JP5207773B2 - Access control system - Google Patents

Description

  The present invention relates to an entrance / exit management system for managing a person who enters and exits a building or a specific room.

The entrance / exit management system for managing entrance / exit of a person is provided with an input device at the entrance / exit of a building and a camera separately from the input device. Note that this camera always operates as long as it is connected to the power source, and captures the situation within the range of the angle of view of the camera.
When the input key of the input device is operated, the video before and after the input key is operated is stored as a trigger, and the stored video can be confirmed afterwards.
Therefore, if the number of times the input key is operated increases, the amount of images to be stored increases accordingly. That is, if there are many visitors and the input key is operated many times, the amount of images stored increases.
JP 2002-213123 A JP 2007-231571 A

  In the conventional entrance / exit management system as described above, the image is stored when the input key is pressed. For example, when the system is used for a password input using the numeric keypad, the password is not stored. Images corresponding to the number of operations of the input key for inputting are stored. If the images corresponding to the number of operations of the input key are stored in this way, the storage capacity becomes enormous, and there is a problem that the access control system becomes expensive.

In addition, when a password is input using a numeric keypad, a dummy key may be input in addition to the password to prevent unauthorized acquisition of the password by peeping. In such a case, if the concept of the conventional access control system is used as it is, the amount of images to be stored corresponding to the number of operations of the input keys also increases rapidly. Therefore, in this case, there arises a problem that a larger storage capacity is required and the cost becomes higher.
An object of the present invention is to realize an access control system that can reduce the capacity of a storage unit that stores image data captured by a camera.

  According to a first aspect of the present invention, there is provided an input unit having an input key for inputting a password, a camera, a temporary storage unit for temporarily storing a specific image captured by the camera as image data of a still image, and temporary storage A main storage unit that stores the specified main image data among the image data stored in the unit, and a processing unit. When the signal is input from the input unit, the processing unit captures the image with the camera at the time of input. A function to store the image data in the temporary storage unit in association with the input order of the signals and the image data stored in the temporary storage unit, It is characterized in that it has a function of storing main image data in the input order specified in a range that goes back by a preset signal input order from the time when the password input end signal is input from

  The second invention is based on the first invention, and the processing unit specifies, as a password, an input signal that goes back by a preset number of digits of the password from the input time of the password input end signal, Of the password input signals, the image data captured by the camera when a preset signal is input is stored as main image data in the main storage unit.

In the first and second inventions, when the password input end signal is input among the image data stored in the temporary storage unit, it is sufficient to store only one determined image data in the main storage unit. . Therefore, unlike the conventional case where image data is stored in the storage unit by the number of signal inputs, the storage capacity of the main storage unit can be reduced.
As described above, since it is sufficient to select only one specific image data from the temporary storage unit and store it in the main storage unit, the temporary storage unit temporarily stores at least image data for a preset number of digits. You just have to remember. In this way, image data of a predetermined number of digits or more may be deleted in order. Accordingly, the storage capacity of the temporary storage unit can be reduced, and the storage capacity of the entire system can be reduced.

  In particular, in the second invention, the main image data to be stored in the main storage unit is specified from the image data corresponding to the signal input for inputting the password among the signal inputs from the input unit. Therefore, it is sufficient to store image data for the number of digits of the password in the temporary storage unit, so that the storage capacity of the temporary storage unit can be further reduced.

The entrance / exit management system of the embodiment shown in FIGS. 1 to 4 attaches the entrance / exit management unit 1 shown in FIG. 1 to a wall beside the entrance / exit. The access control unit 1 includes a casing 2 and a transparent slide-type cover 3 that covers the front surface of the casing 2, and includes a touch panel 4 and a lens 5a of a camera 5 provided on the upper surface of the casing 2. .
The touch panel 4 constitutes an input unit of the present invention for a person to input a password, and the number 0 to 9 for forming the password and a password input end signal are input on the surface thereof. An enter key “E” is displayed. When each key displayed on the touch panel 4 is pressed, a signal corresponding to the key is input to the processing unit 6a (see FIG. 2).
Moreover, although the said cover 3 is for covering the front of the casing 2 and protecting the touch panel 4 from dust etc. normally, it is not essential. As shown by a two-dot chain line in FIG. 1, the cover 3 is configured such that the touch panel 4 can be exposed by shifting upward with respect to the casing 2.

As shown in FIG. 2, the casing 2 includes a camera 5 having the lens 5a, a CPU 6 connected to the camera 5 and the touch panel 4, a main storage unit 7 connected to the CPU 6, and a signal output. A unit 8, a battery 9, and a power supply circuit 10 are provided. The CPU 6 comprises a processing unit 6a and a temporary storage unit 6b according to the present invention.
The power supply circuit 10 is connected to an external power supply so that power is supplied to each element of the access control unit 1. However, when a power failure occurs or the power supply circuit 10 cannot be connected to an external power supply, the battery 9 functions as a power source for each of the above components.
The signal output unit 8 has a function of transmitting data stored in the main storage unit 7 to a computer of a management center (not shown).

Furthermore, an electric lock 12 provided at the door of the entrance / exit is connected to the processing unit 6 a via the electric lock control unit 11.
When the password is input from the touch panel 4, the processing unit 6a determines whether the password is correct. When the processing unit 6a determines that the input password is correct, the processing unit 6a unlocks the electric lock control unit 11. A command signal is output and the electric lock 12 is unlocked.
On the other hand, the camera 5 is activated when the access control unit 1 is connected to a power source, and continues to operate thereafter.

  On the other hand, when a signal is input from the touch panel 4, the processing unit 6a has a function of capturing an image taken by the camera 5 when the signal is input and storing the captured image data in the temporary storage unit 6b. Yes. The signal input from the touch panel 4 is a signal input by pressing a specific key displayed on the touch panel 4. In this embodiment, a number is input to input a password from the key on the touch panel 4. It includes all signals that are input when a key such as is pressed. Therefore, each time a signal is input from the touch panel 4, the processing unit 6a captures an image captured by the camera 5 in operation as a still image, and stores the captured image data in the temporary storage unit 6b each time. Remember.

Further, when a password input end signal is input from the touch panel 4, the processing unit 6a selects specific image data from the image data stored in the temporary storage unit 6b so far and uses it as main image data. In addition, it has a function of storing only the main image data in the main storage unit 7. A procedure for selecting the main image data from the image data stored in the temporary storage unit 6b will be described later.
The password input end signal is a signal that is input when a predetermined key is pressed on the touch panel. In this embodiment, the specified key is assumed to be an enter key. That is, when the enter key is pressed, the processing unit 6a determines that a password input end signal has been input. Therefore, the password input end signal is different from a signal input when a key for specifying a password is operated or a signal input when a dummy key is operated.

When the password input end signal is input, the processing unit 6a first starts from the time when the password input end signal is input, at a time point that is back by a predetermined number of digits based on the order of signal input. Identify the input signal. When the input signal is specified in this way, image data corresponding to the input of the specified signal is specified and used as main image data, and the main image data is stored in the main storage unit 7.
When the main image data is stored in the main storage unit 7 as described above, the image data stored in the temporary storage unit 6b becomes unnecessary. Therefore, the temporary storage unit 6b only needs to temporarily store a plurality of image data until the main image data is stored in the main storage unit 7 as described above.

The operation of the access control system of this embodiment will be described below with reference to FIGS. FIG. 3 is a flowchart showing a processing procedure of the processing unit 6a, and the table of FIG. 4 shows an example of data temporarily stored in the temporary storage unit 6b. In this embodiment, it is assumed that a four-digit password is used.
Also, here, when the password input end signal is input, the processing unit 6a identifies the first digit of the password by going back in the input order by the number of digits of the password from the input signal input immediately before the end signal. To do. When the first digit of the password is specified in this way, the processing unit 6a uses the image data input at the time of the key operation of the first digit as the main image data. In the following, this main image data is specified. The process of storing it in the main storage unit 7 will be described in detail.

  First, when the power of the access control unit 1 is turned on, the camera 5 is activated, and the processing unit 6a enters a standby state in which n = 1 and receives an input signal from the touch panel 4 in step S1. In step S2, the processing unit 6a determines whether or not the input signal P (n) is input from the key on the touch panel 4, and repeats step S2 until the signal is input. If there is an input of the input signal P (n), the processing unit 6a uses it as a trigger and proceeds to step S3. Here, the input signal P (n) is the nth input signal input through the keys of the touch panel 4. That is, “n” is the input order of the signal of the present invention.

In step S3, the processing unit 6a captures an image captured by the camera 5 when the signal is input as image data G (n) of a still image.
In step S4, the processing unit 6a associates the input signal P (n) input in step S2 with the image data G (n) input in step S3, and the data input order is n. Are associated and stored in the temporary storage unit 6b.
In step S5, the processing unit 6a determines whether a password input end signal has been input. If the password input end signal is input, the process proceeds to step S7. If the password input end signal is not input, the process proceeds to step S6 and returns to step S2. That is, the processing unit 6a repeats the processing from step S2 to step S6 until a password input end signal is input from the key on the touch panel 4.

If it is determined in step S5 that the password input end signal has been input, in step S7, the processing unit 6a selects the latest signal from the time when the password input end signal is input from the data stored in the temporary storage unit 6b. With the input as the first digit, the number of digits a of the password, in this case, the input signals P (n−a + 1) to P (n) for four digits retroactive to four are specified as the password.
This process will be specifically described as follows. For example, it is assumed that six signals including dummy keys have been input from the touch panel 4 until step S7. Each time the signal is input, the processing unit 6a takes the image data captured by the camera 5 at that time as a still image, captures the image data, associates it with the input signal P (n), and temporarily stores the image data. 6b. Therefore, as shown in the table of FIG. 4, the temporary storage unit 6b has six sets of correspondence data in which the input signals P (1) to P (6) are associated with the image data G (1) to G (6). Is remembered. After the input signal P (6) and the image data G (6) are input, if a password input end signal is input by the enter key, the processing unit 6a determines that in step S5, and goes back from that point. Thus, the input signals P (3), P (4), P (5), and P (6) for four digits that are the number of digits of the password are specified as the password.

Further, in step S8, the processing unit 6a, from the image data stored in the temporary storage unit 6b, the first digit input signal P (n−a + 1) of the specified password, that is, the input signal P (3 ), The image data G (3) enclosed by a square in FIG. 4 is specified as main image data, and is stored in the main storage unit 7.
Next, in step S9, the processing unit 6a collates the specified passwords P (3) to P (6) with reference data stored in advance. The reference data is a correct password and is stored in advance in the processing unit 6a or stored in a storage unit other than the processing unit 6a connected to the processing unit 6a.

In step S10, the processing unit 6a determines whether the password specified in step S7 matches the reference data. If the processing unit 6a determines that they match, the process proceeds to step S11, and the processing unit 6a Outputs an unlock command signal for unlocking the electric lock 12 via the electric lock control unit 11.
In step S12, the processing unit 6a causes the main storage unit 7 to store the password verification result and the verification time in association with the image data G (3) stored in the main storage unit 7 in step S8.

On the other hand, if the password input from the touch panel 4 does not match the reference data in step S10, the process of the processing unit 6a skips step S11 and proceeds to step S12.
The electric lock 12 normally maintains a locked state, and is unlocked only for a fixed time only when the unlock command signal is output in step S11.
Also, in the flowchart shown in FIG. 3, whichever of steps S8 and S12 for storing data in the main storage unit 7 and steps S9 to S11 for collating passwords and outputting an unlock signal may be first.

By the processing of the processing unit 6a described above, only one main image data is stored in the main storage unit 7 for each password input, and the storage capacity of the main storage unit 7 can be reduced. .
In this embodiment, in step S12, the main image data is stored in association with the password verification result and verification time. However, the main storage unit 7 stores only the main image data. The collation result and the collation time may not be associated. Even when only the main image data is stored in the main storage unit 7, it is possible to know what kind of person has entered or exited by checking it later.
However, as described above, if the password verification result and the verification time are stored in association with the main image data, it is possible to distinguish the person who entered and exited and the person who could not enter and exit according to the result of the verification, The time can also be specified.

If the touch panel 4 is simply pressed with mischief, and the password input end signal is pressed in a state where the number of input signals that have been input is less than the number of digits of the password, the processing unit 6a performs the step of FIG. Even if it goes back by the number of digits of the password in S7, there is no corresponding input signal and the password cannot be specified. In such a case, what image data is to be used as the main image data among the data stored in the temporary storage unit 6b may be set in the processing unit 6a in advance.
In the above embodiment, the CPU 6 includes the processing unit 6a and the temporary storage unit 6b. However, the processing unit 6a and the temporary storage unit 6b may be provided separately.

Further, in this embodiment, the image data corresponding to the input signal of the first digit of the password is used as the main image data when the password input end signal is input by the number of digits of the password. The method of determining data is not limited to this.
Among the image data stored in the temporary storage unit 6b, the image data in the input order specified in a range that is traced back from the password input end signal by a preset signal input order is specified as main image data, and By storing only the main image data in the main storage unit 7, the point that the storage capacity of the main storage unit 7 can be reduced is the same as in the above embodiment.

In the system of this embodiment, the main image data is determined retrospectively with reference to the input time point of the password input end signal. Therefore, the number of data temporarily stored in the temporary storage unit 6b is also determined. The range of the number of digits going back to specify the main image data is sufficient. For example, as described in the above embodiment, when the image data copied when the first digit of the 4-digit password is input is set as the main image data, the data temporarily stored in the temporary storage unit 6b 4 digits are enough. When a new signal is input, the oldest data in the temporary storage unit 6b is overwritten with the data in which the latest input signal and the image data at the time of input are associated with each other, so that only the data for four digits is always displayed. As a result, the storage capacity of the temporary storage unit can be reduced. In this way, the storage capacity of the entire system can be reduced.
In particular, when the CPU 6 is responsible for the function of the temporary storage unit 6b as in the above embodiment, if the amount of data stored in the temporary storage unit 6b can be reduced, the CPU 6 can have a margin, and the processing unit 6a. The processing speed can be increased.

  In the above-described embodiment, an example in which the processing unit 6a specifies a password and collates it to control the electric lock has been described. However, password collation is not an essential process. When the processing unit 6a does not perform the process of specifying the password, it is not necessary to store the input signal itself input from the touch panel 4 in the temporary storage unit 6b. In such a case, the processing unit 6a needs to store only the input order of the input signals in the temporary storage unit 6b in association with the image data, so that the storage capacity of the temporary storage unit 6b is further reduced. be able to.

Further, as in the above embodiment, when the number of digits for specifying the main image data retroactively from the input of the password input end signal is within the range of the number of digits of the password, it is stored in the main storage unit 7. There is a high possibility that the face image of the user is included in the main image data.
This is because, in the system that allows the dummy key to be entered before the password is entered as described above, the user may press the dummy key to watch out for others from behind. This is because, when the password is input, it is more likely that the user is looking at the touch panel 4 so that there is no input error compared to when the key is pressed. Therefore, as shown in FIG. 1, when the access control unit 1 having the lens 5 a provided on the upper part of the touch panel 4 is used, the image data captured while entering the password is not a dummy, The possibility that an image is included increases. That is, when the image data copied at the time of inputting a preset signal among the input signals of the password is used as the main image data, the possibility that the main storage unit 7 stores the face image increases. Makes it easier to manage access. That is, if the image data corresponding to any one of the four input signals P (3) to P (6) shown in FIG. 4, which are signals constituting the password, is the main image data. There is a high possibility that a face image is included in the data.

  By specifying the main image data from the image data captured when inputting the signal corresponding to each digit of the password, it becomes easier to store the image data including the face image in the main storage unit 7. As described above, if the image data corresponding to the input of the first digit of the password is the main image data as in the above embodiment, there is a possibility of storing the face image in the main storage unit 7. It gets even higher. When entering the first digit of the password, the user is particularly conscious of the possibility of checking the key layout displayed on the touch panel 4, so that the face image is clearly copied at that time. More likely. Therefore, if the image data corresponding to the input of the first digit of the password is used as the main image data as in the above-described embodiment, there is a higher possibility that a face image is included in the image data. It becomes easy to specify the person who entered and exited based on the image data stored.

Furthermore, if the processing unit 6a randomizes the arrangement of the numeric keys displayed on the touch panel 4 and changes the arrangement periodically or every time the key is input, the user can use the touch panel 4 to enter the password. It may be easier to focus attention and more easily capture a face image.
In addition, the password is not limited to an arrangement of numbers only, and may be a combination of English letters and other symbols. In this case, the processing unit 6a displays keys necessary for inputting the password on the touch panel 4. To.
The input unit of the present invention is not limited to the touch panel 4 but may be a button displaying numbers, for example.

In this embodiment, the signal output unit 8 is provided so that the data stored in the main storage unit 7 can be appropriately transmitted to an external management computer, and the received data can be managed by the management computer that has received the data. ing. Thus, when transmitting the data stored in the main storage unit 7, if the image data to be transmitted is small and the amount of data is small, the transmission speed is increased accordingly, and the transmission cost can be reduced. is there.
However, the data stored in the main storage unit 7 can be directly read out from the access control unit 1, and in this case, the signal output unit 8 is not necessary.
Furthermore, in the above embodiment, all the components necessary for this system are provided in the casing 2 of the access control unit 1, but all the components may not necessarily be provided in the same casing 2. When the casing 2 is installed in the vicinity of the entrance / exit, the casing 2 only needs to include the touch panel 4 and the camera 5.

In the above-described embodiment, the system in which the camera 5 is always operating has been described. However, the present invention is normally inactive and the camera 5 operates every time a signal is input to capture a still image. It can also be applied to the system.
Therefore, in the present invention, the specific image captured by the camera includes an image captured by the camera operating constantly and a still image captured by the camera operating each time a signal is input from the touch panel. And are included.

It is an outline perspective view of the access control unit of an embodiment. It is a block diagram which shows the internal structure of an access control unit. It is a flowchart which shows the process sequence of a process part. It is the table which showed the example of the data which the temporary memory part has memorize | stored.

Explanation of symbols

1 In / Out Management Unit 4 Touch Panel 5 Camera 6 CPU
6a Processing unit 6b Temporary storage unit 7 Main storage unit

Claims (2)

  An input unit having an input key for inputting a password, a camera, a temporary storage unit that temporarily stores a specific image captured by the camera as image data of a still image, and an image stored in the temporary storage unit A main storage unit for storing main image data identified among the data and a processing unit. When a signal is input from the input unit, the processing unit displays an image captured by the camera at the time of input as a still image. A function for storing the image data in the temporary storage unit in association with the input order of the signals, and a password input end signal from the input unit among the image data stored in the temporary storage unit. An entry / exit management system having a function of storing main image data in an input order specified in a range that is traced back in advance by a preset signal input order from the time of input.   The processing unit specifies, as a password, an input signal that is traced by the number of digits of a preset password from the input time of the password input end signal, and at the time of a preset signal input among the input signals of the password The entrance / exit management system according to claim 1, further comprising a function of storing image data captured by a camera as main image data in a main storage unit.

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