JP5776438B2 - Image processing apparatus, power drop detection warning method and program for data transmission apparatus using the same - Google Patents

Description

  The present invention relates to an image processing apparatus capable of receiving a signal output from a data transmission apparatus worn by a user and transmitted through a human body as a communication path and performing user authentication at login, and a data transmission apparatus using the same The present invention relates to a power supply drop detection warning method and a power supply drop detection warning program for a data transmission apparatus.

  As a recent new communication technology, “human body communication” using the human body as a communication path has been proposed. In this technique, the security level of wired communication is ensured by performing communication via a human body.

  An image processing apparatus that can apply such human body communication technology to receive a signal output from a data transmission apparatus worn by a user and transmitted through the human body as a communication path, and perform user authentication at login. Proposed. In this image processing apparatus, when a user is in contact with the image processing apparatus, communication is performed between the data transmission apparatus and the image processing apparatus via a human body.

  The data transmission device worn by the user is equipped with a power source (battery), and communication is realized by generating an electric field with the battery. However, when the remaining capacity of the battery decreases, the data transmission device The signal output becomes small, and a communication error occurs on the image processing apparatus side. In particular, the data transmission apparatus is often left while being worn on the human body, and it is not easy for the user to notice a decrease in the remaining battery capacity.

  For this reason, measures such as providing an indicator to indicate when the battery is low on the data transmission device side are considered, but users often put the data transmission device in their pockets or hang from their necks. There is very little opportunity to look at the device, so you often don't notice the warning sign.

  Patent Document 1 reads whether the signal level extracted from communication data of human body communication is higher or lower than a predetermined reference value, and optimizes the relative relationship between the level of the signal waveform and the reference value. There has been proposed a data communication apparatus that performs human body communication after correcting to a certain state.

JP 2002-111602 A

  However, the technique described in Patent Document 1 secures human body communication by changing the reference value of the signal level, and the remaining capacity of the battery will eventually be lost although the communicable period is extended. However, it has not been able to provide a fundamental solution to the problem that the user is less likely to notice a decrease in the remaining battery capacity.

  The present invention has been made in view of such a technical background, and receives a signal output from a data transmission device worn by a user and transmitted through the user's human body as a communication path, and logs in at the time of login. An image processing apparatus capable of performing user authentication, which can reliably cause a user to recognize a decrease in the remaining capacity of the power source of the data transmission apparatus, and a power source decrease of the data transmission apparatus by the image processing apparatus It is another object of the present invention to provide a detection warning method and to provide a program for causing a computer of the image processing apparatus to execute a power supply lowering detection warning process of the data transmission apparatus.

The above problem is solved by the following means.
(1) Receiving means for receiving a signal output from a data transmitting device worn by the user and transmitted through the user's human body as a communication path; and the data received by the receiving means for each user authentication at login S / N ratio detection means for detecting the S / N ratio, which is the ratio between the level of the signal from the transmitter and the noise level, provided inside or outside the own apparatus, and detected by the S / N ratio detection means A storage means for storing the S / N ratio as a log, and the current S / N ratio is smaller than the previous S / N ratio stored as a log in the storage means. sometimes and S / N ratio is lowered, by determining whether the S / N ratio of the current falls below the preset predetermined value, a prediction means for predicting the timing when communicating with the data transmission device becomes impossible The image processing apparatus characterized by comprising a, a warning informing means for informing a warning when the near timing becomes incommunicable predicted by the prediction means.
(2) Receiving means for receiving a signal output from a data transmitting device worn by the user and transmitted through the user's human body as a communication path; and the data received by the receiving means at every user authentication at login S / N ratio detection means for detecting the S / N ratio, which is the ratio between the level of the signal from the transmitter and the noise level, provided inside or outside the own apparatus, and detected by the S / N ratio detection means A storage unit that stores the S / N ratio as a log; a prediction unit that predicts a timing at which communication with the data transmission device is disabled from a change in the S / N ratio stored as a log in the storage unit; Warning notification means that notifies a warning when the timing when communication is impossible predicted by the prediction means is near, and the S / N ratio detection means transmits the data during one login. The S / N ratio is detected at one or more times with respect to the signal transmitted from the device and received by the receiving means, and the predicting means detects one or more S / N detected during the login. An image processing apparatus that predicts the timing at which communication is disabled using the N ratio, and restricts subsequent access to the data transmission apparatus from the own apparatus when the predicted timing is close.
(3) Receiving means for receiving a signal output from a data transmitting device worn by the user and transmitted through the user's human body as a communication path; and the data received by the receiving means at every user authentication at the time of login S / N ratio detection means for detecting the S / N ratio, which is the ratio between the level of the signal from the transmitter and the noise level, provided inside or outside the own apparatus, and detected by the S / N ratio detection means A storage unit that stores the S / N ratio as a log; a prediction unit that predicts a timing at which communication with the data transmission device is disabled from a change in the S / N ratio stored as a log in the storage unit; Warning notification means that notifies a warning when the timing of communication failure predicted by the prediction means is near, and the S / N ratio detection means is output from the data transmission device and is An S / N ratio is detected for a signal received by the receiving unit via a different communication path, and the storage unit stores an S / N ratio for each of the detected different communication paths, and the prediction unit Predicts the timing at which communication is disabled from the change in the S / N ratio for each different communication path stored in the storage means, and the warning notification means is predicted by the prediction means. An image processing apparatus that issues a warning when the timing at which communication becomes impossible is almost the same for all different communication paths.
(4) Receiving means for receiving a signal output from a data transmitting device worn by the user and transmitted through the user's human body as a communication path; and the data received by the receiving means at every user authentication at login S / N ratio detection means for detecting the S / N ratio, which is the ratio between the level of the signal from the transmitter and the noise level, provided inside or outside the own apparatus, and detected by the S / N ratio detection means A storage unit that stores the S / N ratio as a log; a prediction unit that predicts a timing at which communication with the data transmission device is disabled from a change in the S / N ratio stored as a log in the storage unit; Warning notification means that notifies a warning when the timing at which communication is predicted predicted by the prediction means is near, and communication is disabled by the prediction means when the device is processing a job. That if it timing close to that expected, the warning notification unit image processing device that does not alert notification.
(5) The image processing apparatus according to any one of (1) to (4), wherein the storage unit is provided in an external server to which a plurality of image processing apparatuses including the self apparatus can be connected.
(6) When the S / N ratio at the previous login and the S / N ratio at the current login, which are detected by the S / N ratio detection means, are continuously decreased, the warning notification means 6. The image processing apparatus according to any one of the preceding items 1 to 5, wherein a warning is displayed on the display means in an erasable manner by operation.
(7) When the S / N ratio at the previous login and the S / N ratio at the current login, which are detected by the S / N ratio detection means, are continuously reduced, the warning notification means 7. The image processing apparatus according to any one of the preceding items 1 to 6, wherein a warning notification mail is transmitted to the mail address.
(8) A reception step of receiving a signal output from a data transmission device worn by the user and transmitted through the user's human body as a communication path, and the data received in the reception step at every user authentication at the time of login An S / N ratio detection step for detecting an S / N ratio that is a ratio between a signal level from a transmission device and a noise level, and provided in or outside the own device and detected in the S / N ratio detection step The step of storing the S / N ratio as a log in the storage means, and the current S / N ratio is smaller than the previous S / N ratio stored as a log in the storage means, and the past two or more times including this time It has reduced S / N ratio at the time of login in, by determining whether the S / N ratio of the current falls below the preset predetermined value, becomes impossible to communicate with the data transmission device A power supply for a data transmission device by an image processing device, comprising: a prediction step for predicting imming; and a warning notification step for notifying a warning when the timing of communication failure predicted in the prediction step is near Degradation detection warning method.
(9) A reception step of receiving a signal output from a data transmission device worn by the user and transmitted through the user's human body as a communication path, and the data received in the reception step at every user authentication at the time of login An S / N ratio detection step for detecting an S / N ratio, which is a ratio between the level of the signal from the transmission device and the noise level;
A step of storing the S / N ratio detected in the S / N ratio detection step as a log in a storage unit provided inside or outside the device;
The current S / N ratio is smaller than the previous S / N ratio stored as a log in the storage means, and the S / N ratio has decreased at the time of login in the past two or more times including this time. A prediction step for predicting a timing at which communication with the data transmission device is disabled by determining whether the S / N ratio is less than a predetermined value set in advance ;
A warning notifying step for notifying a warning when the timing at which communication is disabled predicted in the prediction step is near;
Is a power-drop detection warning program for a data transmission apparatus for causing a computer of the image processing apparatus to execute the above-described process.
(10) A reception step of receiving a signal output from a data transmission device worn by the user and transmitted through the user's human body as a communication path; and the data received by the reception step at every user authentication at the time of login An S / N ratio detection step for detecting an S / N ratio, which is a ratio of a signal level to a noise level from a transmission device, and an internal or external device, and detected by the S / N ratio detection step. A step of storing the S / N ratio as a log in a storage unit, and a prediction step of predicting a timing at which communication with the data transmission device is disabled from a change in the S / N ratio stored as a log in the storage unit; A warning notification step for notifying the warning when the timing when the communication is disabled predicted by the prediction step is near, and the S / N ratio detection step In the first step, the S / N ratio is detected at one or more times with respect to the signal transmitted from the data transmission device and received in the reception step during one login, and in the prediction step, One or more S / N ratios detected during the login are used to predict the timing at which communication is impossible. When the predicted timing is close, subsequent access from the own device to the data transmission device A method for warning the detection of a drop in power supply of a data transmission device by an image processing device that restricts the above.
(11) A reception step of receiving a signal output from a data transmission device worn by a user and transmitted through the user's human body as a communication path; and the data received by the reception step at every user authentication at the time of login An S / N ratio detection step for detecting an S / N ratio, which is a ratio of a signal level to a noise level from a transmission device, and an internal or external device, and detected by the S / N ratio detection step. A step of storing the S / N ratio as a log in a storage unit, and a prediction step of predicting a timing at which communication with the data transmission device is disabled from a change in the S / N ratio stored as a log in the storage unit; A warning notification step for notifying the warning when the timing when the communication is disabled predicted by the prediction step is near, and the S / N ratio detection step In the first step, an S / N ratio is detected for the signal output from the data transmission apparatus and received in the reception step via a plurality of different communication paths, and in the storage step, the detected different communication paths The S / N ratio for each communication is stored, and in the prediction step, the timing at which communication is disabled is predicted for each different communication path from the change in the S / N ratio for each different communication path stored in the storage unit, In the warning notification step, the power transmission level drop detection warning method of the data transmission apparatus by the image processing apparatus that notifies the warning when the timing at which communication is impossible is almost reached in all the different communication paths predicted by the prediction step.
(12) A reception step of receiving a signal output from a data transmission device worn by the user and transmitted through the user's human body as a communication path, and the data received by the reception step at every user authentication at the time of login An S / N ratio detection step for detecting an S / N ratio, which is a ratio of a signal level to a noise level from a transmission device, and an internal or external device, and detected by the S / N ratio detection step. A step of storing the S / N ratio as a log in a storage unit, and a prediction step of predicting a timing at which communication with the data transmission device is disabled from a change in the S / N ratio stored as a log in the storage unit; A warning notification step for notifying the warning when the timing at which communication is disabled predicted by the prediction step is near, When, if it timings become incommunicable by the prediction step is closer is predicted, the power drop detection warning method for data transmission device according to an image processing device that does not alert notification at the alert notification step.
(13) A reception step of receiving a signal output from a data transmission device worn by the user and transmitted through the user's human body as a communication path; and the data received by the reception step at every user authentication at the time of login An S / N ratio detection step for detecting an S / N ratio, which is a ratio of a signal level to a noise level from a transmission device, and an internal or external device, and detected by the S / N ratio detection step. A step of storing the S / N ratio as a log in a storage unit, and a prediction step of predicting a timing at which communication with the data transmission device is disabled from a change in the S / N ratio stored as a log in the storage unit; A warning notification step of notifying a warning when the timing of communication failure predicted by the prediction step is near, and a computer of the image processing apparatus. In the S / N ratio detection step, the S / N ratio is detected at one or more times with respect to the signal transmitted from the data transmission device and received in the reception step during one login. In the prediction step, one or a plurality of S / N ratios detected during the log-in are used to predict the timing at which communication is impossible, and when the predicted timing is close, the subsequent data A power supply drop detection warning program for a data transmission apparatus for causing the computer to execute a process of restricting access from the own apparatus to the transmission apparatus.
(14) A reception step of receiving a signal output from a data transmission device worn by the user and transmitted through the user's human body as a communication path, and the data received by the reception step at every user authentication at the time of login An S / N ratio detection step for detecting an S / N ratio, which is a ratio of a signal level to a noise level from a transmission device, and an internal or external device, and detected by the S / N ratio detection step. A step of storing the S / N ratio as a log in a storage unit, and a prediction step of predicting a timing at which communication with the data transmission device is disabled from a change in the S / N ratio stored as a log in the storage unit; A warning notification step of notifying a warning when the timing of communication failure predicted by the prediction step is near, and a computer of the image processing apparatus. In the S / N ratio detection step, an S / N ratio is detected for the signal output from the data transmission device and received in the reception step via a plurality of different communication paths, and the storing step Then, the detected S / N ratio for each different communication path is stored, and in the prediction step, the communication becomes impossible due to the change in the S / N ratio for each different communication path stored in the storage means. For each of the different communication paths, and in the warning notification step, the computer is caused to execute a process of notifying the warning when the timing at which communication is impossible is near in all of the different communication paths predicted by the prediction step. A power supply drop detection warning program for a data transmission apparatus.
(15) A reception step of receiving a signal output from a data transmission device worn by the user and transmitted through the user's human body as a communication path, and the data received by the reception step at every user authentication at the time of login An S / N ratio detection step for detecting an S / N ratio, which is a ratio of a signal level to a noise level from a transmission device, and an internal or external device, and detected by the S / N ratio detection step. A step of storing the S / N ratio as a log in a storage unit, and a prediction step of predicting a timing at which communication with the data transmission device is disabled from a change in the S / N ratio stored as a log in the storage unit; A warning notification step of notifying a warning when the timing of communication failure predicted by the prediction step is near, and a computer of the image processing apparatus. And when it is predicted that the timing at which communication is not possible is predicted by the prediction step when the device is processing a job, the computer executes a process that does not perform the warning notification in the warning notification step. A power supply drop detection warning program for a data transmission apparatus.

According to the invention described in (1) above, the timing at which the image processing apparatus becomes unable to communicate is predicted, and a warning is notified when the timing at which communication is impossible is near. As compared with the case where the notification is made, the user can surely recognize the decrease in the capacity of the power source. Moreover, the current S / N ratio is smaller than the previous S / N ratio that is detected and stored as a log each time user authentication is performed during login, and the S / N ratio during login in the past two or more times including this time By determining whether or not the current S / N ratio has fallen below a predetermined value set in advance , the timing at which communication is disabled is predicted, and a warning is issued when the timing at which communication is disabled is near Therefore, a warning can be notified before the capacity of the power supply is exhausted, and the user can deal with it quickly before a communication error occurs.

According to the invention described in (2) above, when one or a plurality of S / N ratios detected during one login are used to predict when communication is impossible, and when the predicted timing is close Since the subsequent access from the image processing apparatus to the data transmission apparatus is restricted, it is possible to reliably prevent a communication error from occurring during login.

According to the invention described in the above item (3), the S / N ratio is detected for the signal output from the data transmission apparatus and received by the receiving means via a plurality of different communication paths, and for each different communication path. in all, because timing at which the lost communication alarm is when close, the detection accuracy of less supply the remaining capacity of the data transmission device increase can Rukoto.

According to the invention described in item (4), the noise level increases when the device is processing a job, and the S / N ratio may decrease even if the remaining capacity of the power source is sufficient. Such erroneous determination due to an increase in noise level can be prevented .

According to the invention described in item (5) above, since the S / N ratio logs of the data transmission devices detected by a plurality of image processing devices can be collectively managed by the server, By referring to the history of the S / N ratio detected by the image processing apparatus, it is possible to predict the timing at which communication is disabled from the change in the S / N ratio .

According to the invention described in the preceding item (6), when the S / N ratio at the previous login and the S / N ratio at the current login detected by the S / N ratio detecting means continuously decrease Since the warning is displayed on the display means, the user can recognize that the remaining capacity of the power source of the data transmission device is gradually decreasing. In addition, the user can also erase warning display.

According to the invention described in the preceding item (7), when the S / N ratio at the previous login and the S / N ratio at the current login detected by the S / N ratio detecting means continuously decrease Since the warning notification mail is transmitted to the user's mail address, the user can recognize that the remaining capacity of the power source of the data transmission device is gradually decreasing .

  According to the invention described in the preceding item (8), the user can surely recognize the decrease in the capacity of the power supply, can notify the warning before the capacity of the power supply is exhausted, and deal with it quickly before a communication error occurs. can do.

  According to the invention described in item (9) above, the process of predicting the timing at which communication with the data transmitting apparatus is disabled and notifying the computer of the image processing apparatus when the timing at which communication is disabled is near. Can be executed.

It is a figure which shows the structure of the communication system using the image processing apparatus which concerns on one Embodiment of this invention. It is a block diagram which shows the structure of an image processing apparatus. It is an external view which shows the structure of the human body receiving part with which the data transmitter and image processing apparatus which a user wears were equipped. It is a block diagram which shows the structure of a human body receiving part. It is a graph which shows transition of S / N ratio when the same user logs in multiple times. It is a table | surface which shows the log | history of S / N ratio. It is a flowchart which shows operation | movement of the image processing apparatus at the time of login. FIG. 10 is a graph showing another embodiment of the present invention, and shows the transition of the S / N ratio when data is received from the data transmission device during login, in addition to the S / N ratio during login. It is a table | surface which shows the log | history of S / N ratio. FIG. 24 is a view for explaining still another embodiment of the present invention and illustrating a plurality of different human body communication paths. It is a table | surface which shows the log | history of S / N ratio when a several different human body communication path | route is used. It is a graph which shows other embodiment of this invention, and shows transition of S / N ratio when the same user logs in several times. It is a table | surface which shows the log | history of S / N ratio. 14 is a flowchart showing an operation of the image processing apparatus in the embodiment shown in FIGS. 12 and 13. It is a figure which shows the network structural example in the case of preserve | saving the detected S / N ratio in an external server.

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram showing a configuration of a communication system using an image processing apparatus according to an embodiment of the present invention.

  In the communication system of FIG. 1, an image processing apparatus 1 and a user terminal 2 including a personal computer are connected via a network 3. Reference numeral 4 denotes a data transmission apparatus worn by a user who uses the image processing apparatus 1. The data transmission apparatus 4 is loaded with a card 42 on which user information and the like are recorded.

  In this embodiment, an MFP (Multi Function Perirherals) in which a plurality of functions such as a copy function, a printer function, and a facsimile function are integrated is used as the image processing apparatus 1. Hereinafter, the image processing apparatus 1 is also referred to as MFP 1.

  FIG. 2 is a block diagram showing the configuration of the MFP 1.

  As shown in FIG. 2, the MFP 1 includes a CPU 11, a RAM 12, a ROM 13, a scanner unit 14, a storage unit 15, a communication interface (communication I / F) 16, an operation panel 17, an engine unit 18, It has a human body communication receiver 19 and the like.

  The CPU 1 controls the entire MFP 1 in an integrated manner. Specifically, the MFP 1 implements functions such as a copy function, a printer function, a facsimile function, and a scan function, and in this embodiment, in particular, based on user information transmitted from the data transmission device 4 at the time of login. The timing at which communication with the data transmission device 4 becomes impossible due to user authentication, or the remaining capacity of the power supply (battery) mounted on the data transmission device 4 is predicted, or the predicted timing at which communication is disabled is close In some cases, a warning is displayed on the operation panel 17, but detailed processing will be described later.

  The RAM 12 is a memory that provides a work area when the CPU 11 operates, and the ROM 13 is a memory in which an operation program for operating the CPU 11 and other data are recorded.

  The scanner unit 14 reads an image of a document set on a document table (not shown) and converts it into image data that is electronic data.

  The storage unit 15 is composed of, for example, a hard disk device (HDD), and for each user (each data transmission device), log information that is a history of S / N ratio described later, authentication information for user authentication, and mail address corresponding to each user. And various data such as image data of a document read by the scanner unit 14 and print data transmitted from the outside are stored.

  The communication interface 16 functions as a communication unit for transmitting / receiving data to / from an external device such as the user terminal 2 via the network 3.

  The operation panel 17 is used by the user to operate the MFP 1 and displays various messages and operation states to the user. The operation panel 17 includes a hard key unit 171 such as a start key and a stop key, A display unit 172 configured with a liquid crystal touch panel or the like is provided.

  The engine unit 18 functions as a printing unit that prints image data of a document read by the scanner unit 14, print data transmitted from the user terminal 2, and the like on a sheet by an electrophotographic method or the like.

  The human body communication receiving unit 19 receives a signal transmitted from the data transmitting device 4 through the user's human body as a communication path, measures a signal level and a noise level, and detects an S / N ratio of the signal. It is.

  FIG. 3 is a diagram showing an external configuration of the data transmission device 4 worn by the user and the human body communication receiving unit 19 installed in the MFP 1, and FIG. 4 is a block diagram showing an electrical configuration of the human body communication receiving unit 19. .

  In the data transmission device 4, an IC card 42, a card reader / writer 43, a D / A converter 44, an electric field transmission / reception unit 45, and a battery 46 are loaded in a thin case 41.

  The IC card 42 stores, for example, a user ID, a personal certificate, an electronic signature, and other information, which are user information indicating the user who owns the data transmission device 4. When logging into the MFP 1, the IC card 42 is stored. The user information is read out, transmitted to the MFP 1, and compared with the authentication information stored in the storage unit 15 or the like of the MFP 1, user authentication is performed.

  The card reader / writer 43 reads the user information from the IC card 42 and writes information to the IC card 42.

  The D / A converter 44 converts information read from the IC card 42 by the card reader / writer 43 into an analog signal.

  The electric field transmission / reception unit 45 generates the electric field by the battery 46, thereby transmitting the analog-converted information to the MFP 1 through the user's human body, or receiving the signal transmitted from the MFP 1 through the user's human body. .

  The battery 46 supplies power to each unit of the data transmission device 4 such as generating an electric field for communicating with the MFP 1. An LED indicator 47 indicating the remaining capacity of the battery 46 is provided on the side surface of the case body 1. When the remaining capacity decreases, the indicator 47 displays a warning that the remaining capacity has decreased due to blinking or a decrease in luminance. However, the user often places the data transmission device 4 in a pocket or the like and hangs from the neck. There is very little opportunity to see the data transmission device 4, and this warning display is often not noticed.

  On the other hand, the human body communication reception unit 19 includes a reception antenna 191, an electric field transmission / reception unit 192, an A / D converter 193, an S / N ratio detection unit 194, a USB interface 195, and the like.

  The receiving antenna 191 takes in user information and the like transmitted from the data transmission device 4 through the human body when the user contacts the antenna directly or through the outer surface of the MFP 1.

  The electric field transmission / reception unit 192 receives the signal transmitted from the data transmission device 4 through the reception antenna 191 or transmits the signal from the MFP 1 to the data transmission device 4 by generating an electric field.

  The A / D converter 193 converts the analog signal from the data transmission device 4 received by the electric field transmission / reception unit 192 into a digital signal.

  The S / N ratio detection unit 194 detects the S / N ratio for the signal from the data transmission device 4 received by the electric field transmission / reception unit 192.

  The USB interface 195 connects the human body communication reception unit 19 and the main body of the MFP 1, and includes a USB communication data generation unit 195a, a USB communication control unit 195b, and a USB host 195c.

  The USB communication data generation unit 195a generates USB communication data from the signal from the data transmission device 4 converted into a digital signal by the A / D converter 193 and the S / N ratio detected by the S / N ratio detection unit 194. Is to be generated. The USB communication data generation unit 195b controls transmission of the generated USB communication data. The USB host 195c is connected to the main body of the MFP 1 via the USB cable 195d.

  Next, an operation of predicting a decrease in the remaining capacity of the battery of the data transmission device 4 (hereinafter also simply referred to as a decrease in the battery) and notifying the warning, which is performed by the MFP 1 illustrated in FIGS.

  A user who uses the MFP 1 wears the data transmission device 4 loaded with the IC card 42 on his body, goes to the MFP 1, and logs in with a body part such as a hand on the receiving antenna 191 of the human body communication receiving unit 19. Make contact. Then, the user information in the IC card read by the card reader / writer 43 of the data transmission device 4 is converted into an analog signal by the D / A converter 44 of the data transmission device 4, and the electric field transmission / reception unit 45, the user's own human body The electric field transmission / reception unit 192 of the human body communication reception unit 19 receives this signal.

  The received signal (received data) is converted into a digital signal by the A / D converter 193, transmitted to the USB communication data generation unit 195a, converted into USB communication data by the USB communication data generation unit 195a, and then USB communication control Under the control of the unit 195b, the data is transmitted to the main body of the MFP 1 via the USB host 195c and the USB cable 195d.

  The CPU 11 of the MFP 1 performs authentication by comparing the transmitted user information and the like with the authentication information stored in the storage unit 15. If the authentication is successful, the login is permitted, and if the authentication is unsuccessful, the login is rejected. .

  On the other hand, a signal (reception data) received by the electric field transmission / reception unit 192 of the human body communication reception unit 19 is also input to the S / N ratio detection unit 194, and the S / N ratio detection unit 194 receives the level and noise of the input signal. The level is measured, and the S / N ratio that is the ratio of both is detected. The detected S / N ratio is transmitted to the main body of the MFP 1 via the USB communication data generation unit 195a, the USB host 195c, and the USB cable 195d.

  The CPU 11 of the MFP 1 stores the transmitted S / N ratio in the storage unit 15 as log information that is history information, and the previous S / N ratio stored in the storage unit 15 and the current S / N ratio. From the change in the ratio, the timing at which communication with the data transmission device 4 due to the decrease in the battery becomes impossible is predicted.

  FIG. 5 is a graph showing changes in the S / N ratio when the same user logs in to the MFP 1 multiple times.

  Circle numbers 1 to 6 on the horizontal axis indicate the timings of the six logins, and V1 to V6 on the vertical axis indicate the levels of the input signal S at the six logins. A symbol N indicates a noise level.

  The history of the S / N ratio measured at each login indicated by the circle numbers 1 to 6 and recorded as a log in the storage unit 15 is as shown in the table of FIG. 6 in this embodiment. They are 90, 80, 70, 60, 50, and 35 in order from the time.

  The transition line H connecting the S / N ratios at the time of each login gradually decreases as shown in FIG. 5, and the S / N ratio at the sixth login is 35, for example, the S / N ratio. It is below the warning level L1 set to 40.

  For this reason, in this embodiment, the S / N ratio at the past five logins gradually decreases, and the S / N ratio at the current (sixth) login is equal to the preset warning level L1. Since it is lower, the S / N ratio is predicted to be lower than the incommunicable level L2 at the next login, and it is predicted that the timing at which communication is disabled is close.

  Therefore, at the time of the sixth login, a warning is notified to the user by displaying a message indicating that the battery is low on the display unit 172 of the operation panel 17.

  That is, as shown in the table of FIG. 6, the MFP 1 determines that the battery of the data transmission device 4 is not low at the time of the last five logins and is “normal”, in other words, the timing at which communication is disabled due to the low battery is not close. . On the other hand, at the sixth log-in, since it is predicted that the battery of the data transmission device 4 is low, “warning” is determined. The determination content of “normal” or “warning” may be stored in the storage unit 15 in association with the S / N ratio, or may not be stored.

  As described above, when the MFP 1 predicts the timing at which communication is disabled due to the decrease in the battery 46 of the data transmission device 4, and the timing at which communication is disabled is near, this is indicated on the display unit 172 of the operation panel 17. Since the warning is displayed to notify the user, the user can surely recognize the decrease in the capacity of the power supply as compared with the conventional case where the warning is displayed on the data transmission device 4 side possessed by the user. Moreover, the timing at which communication is disabled is predicted from the change in the S / N ratio that is detected and stored as a log each time user authentication is performed at login, and a warning is issued when the timing at which communication is disabled is near. The warning can be notified before the capacity of the battery 46 runs out, and the user can deal with it quickly before a communication error occurs.

  Note that, as described above, the method for predicting the timing at which communication cannot be performed is such that the S / N ratio at the time of past login has decreased, and the S / N ratio at the time of this login has a warning level L1 set in advance. It is not limited to the method of determining that the timing is close when the value is less than. For example, the current S / N ratio is smaller than the previous S / N ratio, and the S / N ratio at the time of login has gradually decreased in the past two or more times including this time. When the N ratio falls below a preset warning level L1, it may be determined that the timing at which communication is disabled is near.

  Also, the warning notification mode is not limited to the display of the warning message on the display unit 172 of the operation panel 17, and the MFP 1 may notify the warning by voice. Also, a warning notification mail may be transmitted to the user's mail address together with the warning display on the operation panel 17 or instead of the warning display on the operation panel 17.

  FIG. 7 is a flowchart showing the operation of the MFP 1 during login. This operation is executed by the CPU 11 of the MFP 1 operating according to an operation program recorded on a recording medium such as the ROM 13.

  In step S01, whether or not it has been detected that the user has stood in front of his / her own device is determined by detecting whether or not the electric field transmitting / receiving unit 192 of the human body communication receiving unit 19 has received a signal from the data transmitting device 4. If not (NO in step S01), it waits until detection. If detected (YES in step S01), communication (human body communication) via the user's human body is started with the data transmission device 4 in step S02.

  Next, in step S03, the user information received from the data transmission device 4 is compared with the authentication information stored in the storage unit 15, and after performing user authentication, in step S04, the S / N of the human body communication reception unit 19 is obtained. The strength of the signal received from the data transmission device 4 and the strength of the noise are measured via the detected unit 194, and the S / N ratio is calculated.

  Next, in step S05, the detected S / N ratio is stored in the storage unit 15 as the S / N ratio history of the authenticated user, and in step S06, past history excluding the current S / N ratio for the user is excluded. Determine whether exists.

  If it does not exist (NO in step S06), the process proceeds to step S10. If it exists (YES in step S06), in step S07, a battery decrease is predicted from the past S / N ratio and the current and S / N ratio changes. For example, if the past S / N ratio is continuously decreasing and the current S / N ratio is below the warning level L1, it is determined that the timing at which communication is disabled due to a battery decrease is near.

  Next, in step S08, it is determined whether or not a warning notification indicating that the timing at which communication becomes impossible due to battery low is close is necessary. If not necessary (NO in step S08), the process proceeds to step S10. If necessary (YES in step S08), a warning message is displayed on the display unit 172 of the operation panel 17 in step S09, and then the process proceeds to step S10.

  The user looks at the warning displayed on the display unit 172 of the operation panel 17 and recognizes that the battery is low. Then, the user deletes the warning display with the delete button or the like, executes a job such as copying, and the like from the MFP 1 after completing the operation. Go away.

  In step S10, it is determined whether or not the user has left the front of the user's own device, for example, based on the fact that the MFP 1 has not been operated for a certain period of time. By requesting the user to perform a log-off operation for canceling the login, it may be determined whether the user has left the front of the device.

  If the user is not away from the front of the device (NO in step S10), the user waits to leave, and if left (YES in step S10), the process returns to step S01 to wait for the next login.

  Next, another embodiment of the present invention will be described.

  When various function settings of the MFP 1 are performed during one login, the MFP may require data in the IC card 42 of the data transmission device 4 in order to operate the functions. In this embodiment, the S / N ratio is detected each time data in the IC card 42 is transmitted, and the timing at which communication is disabled using one or a plurality of S / N ratios detected during login. If the predicted timing is close, the subsequent access from the MFP 1 to the data transmission device 4 is restricted.

  That is, even if it is determined from the history of the S / N ratio measured at the time of login and the past S / N ratio that the communication impossible timing due to the decrease in the battery 47 is not close, the battery 46 being logged in , The remaining capacity of the battery 46 decreases, and the timing at which communication becomes impossible may be close. In this embodiment, a warning is displayed even in such a case.

  FIG. 8 is a graph showing the transition of the S / N ratio when data is received from the data transmission device 4 during login, in addition to the S / N ratio during login. In the figure, the circled number 11 on the horizontal axis represents the login timing (timing for user authentication), and the circled number 12 represents the timing when user information is acquired again from the data transmission device 4 in order to use a predetermined function of the MFP 1. The circled number 13 indicates the timing when the certificate is read from the data transmission device 4 in order to use a predetermined function of the MFP 1, and the circled number 14 indicates the data to use the predetermined function of the MFP 1. The timing when the electronic signature is acquired from the transmission device 4 is shown.

  The value of the S / N ratio at each timing is as shown in the table of FIG.

  The CPU 11 of the MFP 1 stores the S / N ratio detected at each timing as a history in the storage unit 15 and predicts the timing at which communication is disabled due to a decrease in the battery 46 at each detection.

  When the S / N ratio at the time of acquiring the electronic signature indicated by the circled number 14 is detected, the S / N ratio at each timing gradually decreases, and the S / N ratio at the time of acquiring the electronic signature Is below the warning level, the CPU 11 determines that the timing at which the S / N ratio falls below the communication disabled level is near.

  Therefore, at that time, the CPU 11 displays a warning on the display unit 172 of the operation panel 17 and restricts subsequent access to the data transmission device 4 from the own device, thereby interrupting the function setting by the user.

  In the embodiment shown in FIGS. 8 and 9, the S / N ratio at the time of login is measured in addition to the S / N ratio three times during the login, but the S / N ratio during the login is 1 The communication failure timing due to a decrease in the battery 46 may be predicted from the S / N ratio and the S / N ratio at the time of login.

  As described above, in this embodiment, the timing at which communication is disabled is predicted using one or a plurality of S / N ratios detected during one login, and when the predicted timing is close, Since access from the MFP 1 to the data transmission device 4 is restricted, it is possible to reliably prevent a communication error from occurring during login.

  Next, still another embodiment of the present invention will be described.

  In this embodiment, a plurality of different human body communication paths are formed between the data transmission device 4 and the MFP 1, and a warning is notified when it is determined that the timing at which communication is impossible is close in all the different communication paths. It is.

  As a different human body communication path, in this embodiment, as shown in FIG. 10, a first communication path R <b> 1 formed by a user touching or approaching a part of the body to the antenna 191 of the human body communication receiving unit 19 is used. In addition, the following second communication path R2 is formed. That is, the carpet 100 is arranged on the floor surface where the user in front of the MFP 1 stands. The carpet 100 is provided with an iron plate or copper plate for an antenna that is communicably connected to the electric field transmitting / receiving unit 192 of the human body communication receiving unit 19 of the MFP 1. A second communication path R <b> 2 is formed from 4 to the human body communication receiving unit 19 through the user's human body and the carpet 100.

  A user who uses the MFP 1 wears the data transmission device 4 loaded with the IC card 42 on his body and goes to the MFP 1 to stand on the carpet 100. Further, when logging in, a body part such as a hand is brought into contact with the receiving antenna 191 of the human body communication receiving unit 19. Then, the user information in the IC card 42 read by the card reader / writer 43 of the data transmission device 4 is sent to the human body communication reception unit 19 via the first communication path R1 and the second communication path R2. And is received by the electric field transceiver 192.

  Then, the S / N ratio detection unit 194 calculates the S / N ratios of the signals received through the first and second communication paths R1 and R2, and the CPU 11 of the MFP 1 calculates the detected S / N ratios of the user. While being stored in the storage unit 15 as a history, the timing at which communication is disabled due to a battery drop is predicted for each communication path based on the past S / N ratio and the current S / N ratio.

  FIG. 11 shows a history of the S / N ratio for each of the two communication paths R1 and R2 detected at the time of each login stored in the storage unit 15. In FIG. 11, the first communication path R1 is described as “hand”, and the second communication path R2 is described as “floor”. In addition, the item “determination” indicates a determination result when the first and second communication paths are individually evaluated as to whether or not to display a warning when each S / N ratio is detected. The item “determination” indicates a determination result when evaluation is performed in consideration of both determination results for each of the first and second communication paths.

  When the determination is made based on the S / N ratio of the signal obtained through the second communication path R2 as in the fourth and fifth logins shown in the table of FIG. When the determination is made based on the S / N ratio for the signal obtained through the communication path R1, the overall determination is determined as “normal”. That is, when only one of the human body communication paths is “warning”, no warning is given.

  On the other hand, if the determination results based on the signals from both communication paths R1 and R2 are both “warning” as in the sixth login, the overall determination is “warning” and the warning is Done.

  10 and 11, the case where two different human body communication paths R1 and R2 are formed is shown, but three or more human body communication paths are formed and the S / N ratio is detected for each. However, the warning may be performed only when it is determined as “warning” in all human body communication paths.

  As described above, the S / N ratio is detected for the signal output from the data transmission device 4 and received by the human body communication receiver 19 via a plurality of different communication paths, and communication is performed in all the different communication paths. Since the warning is notified when the timing of disabling is close, the detection accuracy of the data transmission device 4 for the low battery can be improved.

  Even in the embodiment in which the S / N ratio is detected and determined for each of a plurality of communication paths, the S / N ratio is detected at one or more times during login, and communication is not possible due to a low battery during login. It is good also as what interrupts | blocks communication in anticipation that the timing of this is near.

  Next, still another embodiment of the present invention will be described.

  When the MFP 1 is processing a job, such as copying or facsimile transmission, for example, the noise level increases and the S / N ratio may decrease even if the signal level from the data transmission device 4 is large. is there.

  In this embodiment, erroneous determination based on the low S / N ratio detected during processing of such a job is prevented.

  FIG. 12 is a graph showing the transition of the S / N ratio when the same user logs in multiple times.

  Circle numbers 1 to 6 on the horizontal axis indicate the timing of six logins, and V1 to V6 on the vertical axis indicate the levels of the input signal S at the time of six logins.

  Also, at the first to fourth and sixth logins, the MFP 1 is in a standby state, and the noise level N of the MFP 1 is low. On the other hand, at the fifth login, the MFP 1 is copying and the noise level N is high.

  For this reason, as shown in the table of FIG. 13, the S / N ratio at the time of the fifth login is extremely small as compared with the first to fourth times. Therefore, the determination at the fifth log-in is “warning” if the MFP 1 is on standby, but it is determined that the noise level N is high because of copying, and “normal” is determined. judge.

  As described above, in this embodiment, even when the remaining capacity of the battery 46 is sufficient, it is possible to avoid erroneously informing a warning due to a high noise level when the MFP 1 is processing a job. it can.

  FIG. 14 is a flowchart showing the operation of the MFP 1 in the embodiment shown in FIGS. This operation is executed by the CPU 11 of the MFP 1 operating according to an operation program recorded on a recording medium such as the ROM 13.

  In step S21, it is determined whether or not it has been detected that the user has stood in front of his / her own device based on whether or not the electric field transmitting / receiving unit 192 of the human body communication receiving unit 19 has received a signal from the data transmitting device 4. If not (NO in step S21), it waits until it is detected. If detected (YES in step S21), communication via the human body (human body communication) is started with the data transmission device 4 in step S22.

  Next, in step S23, the user information received from the data transmission device 4 is compared with the authentication information stored in the storage unit 15, and after performing user authentication, in step S24, the S / N of the human body communication reception unit 19 is obtained. The strength of the signal received from the data transmission device 4 and the strength of the noise are measured via the detected unit 194, and the S / N ratio is calculated.

  Next, in step S25, the detected S / N ratio is stored in the storage unit 15 as a history of the S / N ratio of the authenticated user, and in step S26, past S / N ratios for the user other than the current S / N ratio are excluded. Determine if a history exists.

  If it does not exist (NO in step S26), the process proceeds to step S31. If it exists (YES in step S26), in step S27, a battery decrease is predicted from the past S / N ratio and the current and S / N ratio changes.

  Next, in step S28, it is determined whether or not it is necessary to issue a warning indicating that it is almost time for communication to become impossible due to battery low. If not necessary (NO in step S28), the process proceeds to step S31. If necessary (YES in step S28), in step S29, the apparatus determines whether a job process such as copying is in progress.

  If the job is being processed (YES in step S29), the current decrease in the S / N ratio is presumed to be due to the high noise of the MFP 1, so the process proceeds to step S31 without warning. If the job is not being processed (NO in step S29), a warning message is displayed on the display unit 172 of the operation panel 17 in step S30, and the process proceeds to step S31.

  The user looks at the warning displayed on the display unit 172 of the operation panel 17 and recognizes that the battery is low. Then, the user deletes the warning display with the delete button or the like, executes a job such as copying, and the like from the MFP 1 after completing the operation. Go away.

  In step S31, it is determined whether the user has left the front of the device. If the user is not away from the front of the user's own device (NO in step S31), the user waits to leave. If the user leaves (YES in step S31), the process returns to step S21 to wait for the next login.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. For example, an example in which the detected S / N ratio for each user is stored as a log in the storage unit 15 inside the MFP 1 is shown. However, as shown in FIG. 15, an external server 5 is connected to the network 3 and the server 5 The detected S / N ratio may be stored as a log. By storing in the server 5 in this way, when a plurality of MFPs 1A and 1B are connected to the network 3, there is no need to store the S / N ratio for each MFP 1A and 1B, and the S / N for each user is eliminated. The ratio can be collectively managed by the server 5, and more efficient management can be performed. In this case, each MFP 1A, 1B calls the history of the S / N ratio from the server 5, and predicts the timing at which communication is not possible due to a low battery.

  In addition, a warning is notified when the timing of communication failure due to battery low is near, but even if the timing of communication failure due to battery low is not near, the S / N ratio at the previous login and the S / N at the current login When the N ratio continuously decreases, a warning may be displayed on the operation panel 17 in a manner that can be deleted by a user operation, or a warning mail may be transmitted to the user's mail address. As a result, the user can recognize that the remaining capacity of the battery 46 of the data transmission device 4 is gradually decreasing.

1 MFP
3 Network 4 Data Transmitting Device 42 IC Card 46 Battery 5 Server 11 CPU
13 ROM
DESCRIPTION OF SYMBOLS 15 Memory | storage part 17 Operation panel 172 Display part 19 Human body communication receiving part 192 Electric field transmission / reception part 194 S / N ratio detection part 100 Carpet

Claims (15)

Receiving means for receiving a signal output from the data transmitting device worn by the user and transmitted through the user's human body as a communication path;
S / N ratio detecting means for detecting an S / N ratio, which is a ratio of a signal level received from the data transmitting apparatus and a noise level, at each time of user authentication at the time of login;
A storage unit that is provided inside or outside the own device and stores the S / N ratio detected by the S / N ratio detection unit as a log;
The current S / N ratio is smaller than the previous S / N ratio stored as a log in the storage means, and the S / N ratio has decreased at the time of login in the past two or more times including this time. Predicting means for predicting the timing at which communication with the data transmitting device is disabled by determining whether the S / N ratio is below a predetermined value set in advance ;
Warning notification means for notifying a warning when the timing at which communication is disabled predicted by the prediction means is close;
An image processing apparatus comprising: Receiving means for receiving a signal output from the data transmitting device worn by the user and transmitted through the user's human body as a communication path;
S / N ratio detecting means for detecting an S / N ratio, which is a ratio of a signal level received from the data transmitting apparatus and a noise level, at each time of user authentication at the time of login;
A storage unit that is provided inside or outside the own device and stores the S / N ratio detected by the S / N ratio detection unit as a log;
Prediction means for predicting the timing at which communication with the data transmission device is disabled from the change in the S / N ratio stored as a log in the storage means;
Warning notification means for notifying a warning when the timing at which communication is disabled predicted by the prediction means is close;
With
The S / N ratio detection means detects the S / N ratio at one or more times with respect to a signal transmitted from the data transmission device and received by the receiving means during one login.
The prediction means predicts the timing at which communication is disabled using one or a plurality of S / N ratios detected during the login, and when the predicted timing is close, An image processing device that restricts access from the device itself. Receiving means for receiving a signal output from the data transmitting device worn by the user and transmitted through the user's human body as a communication path;
S / N ratio detecting means for detecting an S / N ratio, which is a ratio of a signal level received from the data transmitting apparatus and a noise level, at each time of user authentication at the time of login;
A storage unit that is provided inside or outside the own device and stores the S / N ratio detected by the S / N ratio detection unit as a log;
Prediction means for predicting the timing at which communication with the data transmission device is disabled from the change in the S / N ratio stored as a log in the storage means;
Warning notification means for notifying a warning when the timing at which communication is disabled predicted by the prediction means is close;
With
The S / N ratio detection means detects an S / N ratio for a signal output from the data transmission apparatus and received by the reception means via a plurality of different communication paths,
The storage unit stores the detected S / N ratio for each different communication path,
The prediction means predicts the timing at which communication is disabled from the change in the S / N ratio for each different communication path stored in the storage means for each different communication path,
The warning notification means is an image processing apparatus that notifies a warning when the timing at which communication is impossible is almost the same for all the different communication paths predicted by the prediction means. Receiving means for receiving a signal output from the data transmitting device worn by the user and transmitted through the user's human body as a communication path;
S / N ratio detecting means for detecting an S / N ratio, which is a ratio of a signal level received from the data transmitting apparatus and a noise level, at each time of user authentication at the time of login;
A storage unit that is provided inside or outside the own device and stores the S / N ratio detected by the S / N ratio detection unit as a log;
Prediction means for predicting the timing at which communication with the data transmission device is disabled from the change in the S / N ratio stored as a log in the storage means;
Warning notification means for notifying a warning when the timing at which communication is disabled predicted by the prediction means is close;
With
An image processing apparatus in which the warning notification unit does not perform warning notification when it is predicted that the timing at which communication is impossible by the prediction unit is close when the apparatus is processing a job. The image processing apparatus according to claim 1, wherein the storage unit is provided in an external server to which a plurality of image processing apparatuses including the self apparatus can be connected. When the S / N ratio at the previous login and the S / N ratio at the current login, which are detected by the S / N ratio detection means, are continuously reduced, the warning notification means is erased by a user operation. The image processing apparatus according to claim 1, wherein a warning is displayed on the display unit in a possible manner. When the S / N ratio at the previous log-in and the S / N ratio at the current log-in detected by the S / N ratio detecting means continuously decrease, the warning notification means The image processing apparatus according to claim 1, wherein a warning notification mail is transmitted to the image processing apparatus. A reception step of receiving a signal output from a data transmission device worn by the user and transmitted through the user's human body as a communication path;
An S / N ratio detection step of detecting an S / N ratio, which is a ratio between the level of the signal received from the data transmission device received in the reception step and the noise level, at each user authentication at the time of login;
A step of storing the S / N ratio detected in the S / N ratio detection step as a log in a storage unit provided inside or outside the device;
The current S / N ratio is smaller than the previous S / N ratio stored as a log in the storage means, and the S / N ratio has decreased at the time of login in the past two or more times including this time. A prediction step for predicting a timing at which communication with the data transmission device is disabled by determining whether the S / N ratio is less than a predetermined value set in advance ;
A warning notifying step for notifying a warning when the timing at which communication is disabled predicted in the prediction step is near;
A power drop detection warning method for a data transmission apparatus by an image processing apparatus. A reception step of receiving a signal output from a data transmission device worn by the user and transmitted through the user's human body as a communication path;
An S / N ratio detection step of detecting an S / N ratio, which is a ratio between the level of the signal received from the data transmission device received in the reception step and the noise level, at each user authentication at the time of login;
A step of storing the S / N ratio detected in the S / N ratio detection step as a log in a storage unit provided inside or outside the device;
The current S / N ratio is smaller than the previous S / N ratio stored as a log in the storage means, and the S / N ratio has decreased at the time of login in the past two or more times including this time. A prediction step for predicting a timing at which communication with the data transmission device is disabled by determining whether the S / N ratio is less than a predetermined value set in advance ;
A warning notifying step for notifying a warning when the timing at which communication is disabled predicted in the prediction step is near;
Is a power-drop detection warning program for a data transmission apparatus for causing a computer of the image processing apparatus to execute the above-described process. A reception step of receiving a signal output from a data transmission device worn by the user and transmitted through the user's human body as a communication path;
An S / N ratio detection step of detecting an S / N ratio, which is a ratio between a level of a signal received from the data transmission device received by the reception step and a noise level, at each time of user authentication at the time of login;
A step of storing the S / N ratio detected in the S / N ratio detection step as a log in a storage unit provided inside or outside the apparatus;
A predicting step of predicting a timing at which communication with the data transmission device is disabled from a change in the S / N ratio stored as a log in the storage unit;
A warning notifying step for notifying a warning when the timing at which communication is disabled predicted by the prediction step is near;
With
In the S / N ratio detection step, the S / N ratio is detected at one or a plurality of times with respect to the signal transmitted from the data transmission device and received in the reception step during one login.
In the prediction step, one or a plurality of S / N ratios detected during the log-in are used to predict the timing at which communication is impossible, and when the predicted timing is near, A power drop detection warning method for a data transmission device by an image processing device that restricts access from the device itself. A reception step of receiving a signal output from a data transmission device worn by the user and transmitted through the user's human body as a communication path;
An S / N ratio detection step of detecting an S / N ratio, which is a ratio between a level of a signal received from the data transmission device received by the reception step and a noise level, at each time of user authentication at the time of login;
A step of storing the S / N ratio detected in the S / N ratio detection step as a log in a storage unit provided inside or outside the apparatus;
A predicting step of predicting a timing at which communication with the data transmission device is disabled from a change in the S / N ratio stored as a log in the storage unit;
A warning notifying step for notifying a warning when the timing at which communication is disabled predicted by the prediction step is near;
With
In the S / N ratio detection step, an S / N ratio is detected for the signal output from the data transmission device and received in the reception step via a plurality of different communication paths,
In the storing step, the detected S / N ratio for each different communication path is stored,
In the predicting step, a timing at which communication is disabled is predicted for each different communication path from a change in S / N ratio for each different communication path stored in the storage unit,
In the warning notification step, the power transmission level drop detection warning method of the data transmission apparatus by the image processing apparatus that notifies the warning when the timing at which communication is impossible is almost reached in all the different communication paths predicted by the prediction step. A reception step of receiving a signal output from a data transmission device worn by the user and transmitted through the user's human body as a communication path;
An S / N ratio detection step of detecting an S / N ratio, which is a ratio between a level of a signal received from the data transmission device received by the reception step and a noise level, at each time of user authentication at the time of login;
A step of storing the S / N ratio detected in the S / N ratio detection step as a log in a storage unit provided inside or outside the apparatus;
A predicting step of predicting a timing at which communication with the data transmission device is disabled from a change in the S / N ratio stored as a log in the storage unit;
A warning notifying step for notifying a warning when the timing at which communication is disabled predicted by the prediction step is near;
With
When it is predicted that communication will be impossible due to the prediction step when the device is processing a job, detection of power drop in the data transmission device by the image processing device that does not issue a warning notification in the warning notification step Warning method. A reception step of receiving a signal output from a data transmission device worn by the user and transmitted through the user's human body as a communication path;
An S / N ratio detection step of detecting an S / N ratio, which is a ratio between a level of a signal received from the data transmission device received by the reception step and a noise level, at each time of user authentication at the time of login;
A step of storing the S / N ratio detected in the S / N ratio detection step as a log in a storage unit provided inside or outside the apparatus;
A predicting step of predicting a timing at which communication with the data transmission device is disabled from a change in the S / N ratio stored as a log in the storage unit;
A warning notifying step for notifying a warning when the timing at which communication is disabled predicted by the prediction step is near;
Is executed by the computer of the image processing apparatus,
In the S / N ratio detection step, the S / N ratio is detected at one or a plurality of times with respect to the signal transmitted from the data transmission device and received in the reception step during one login.
In the prediction step, one or a plurality of S / N ratios detected during the log-in are used to predict the timing at which communication is impossible, and when the predicted timing is near, A power supply lowering detection warning program for a data transmission apparatus for causing the computer to execute a process for restricting access from the own apparatus. A reception step of receiving a signal output from a data transmission device worn by the user and transmitted through the user's human body as a communication path;
An S / N ratio detection step of detecting an S / N ratio, which is a ratio between a level of a signal received from the data transmission device received by the reception step and a noise level, at each time of user authentication at the time of login;
A step of storing the S / N ratio detected in the S / N ratio detection step as a log in a storage unit provided inside or outside the apparatus;
A predicting step of predicting a timing at which communication with the data transmission device is disabled from a change in the S / N ratio stored as a log in the storage unit;
A warning notifying step for notifying a warning when the timing at which communication is disabled predicted by the prediction step is near;
Is executed by the computer of the image processing apparatus,
In the S / N ratio detection step, an S / N ratio is detected for the signal output from the data transmission device and received in the reception step via a plurality of different communication paths,
In the storing step, the detected S / N ratio for each different communication path is stored,
In the predicting step, a timing at which communication is disabled is predicted for each different communication path from a change in S / N ratio for each different communication path stored in the storage unit,
In the warning notification step, in all of the different communication paths predicted in the prediction step, detection of a decrease in power supply of the data transmission apparatus for causing the computer to execute a process of notifying the warning when the timing at which communication is impossible is near Warning program. A reception step of receiving a signal output from a data transmission device worn by the user and transmitted through the user's human body as a communication path;
An S / N ratio detection step of detecting an S / N ratio, which is a ratio between a level of a signal received from the data transmission device received by the reception step and a noise level, at each time of user authentication at the time of login;
A step of storing the S / N ratio detected in the S / N ratio detection step as a log in a storage unit provided inside or outside the apparatus;
A predicting step of predicting a timing at which communication with the data transmission device is disabled from a change in the S / N ratio stored as a log in the storage unit;
A warning notifying step for notifying a warning when the timing at which communication is disabled predicted by the prediction step is near;
Is executed by the computer of the image processing apparatus,
Data transmission for causing the computer to execute a process that does not perform a warning notification in the warning notification step when it is predicted that the timing at which communication is disabled by the prediction step is near when the device is processing a job Device power supply low detection warning program.

Images