JPH0831144B2 - Digital operation data recorder - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a digital operation data recording device for recording on a recording medium digital operation data indicating an operation state such as a traveling speed and a traveling distance of a vehicle. .

[Conventional technology]

Conventionally, this kind of digital operation data recording device monitors the operation status of the vehicle, which changes moment by moment, and creates digital operation data indicating the operation status of the vehicle, and sets the created digital operation data to a predetermined set value. It is mounted on a vehicle and used for compression processing based on the above and recording on a recording medium.
The recording medium is composed of an IC memory card or the like that is detachably attached to the recording device, and the digital operation data recorded on this recording medium is read by an analysis device installed in an office that manages vehicle operation. It is decompressed and then analyzed.

More specifically, the recording device samples and inputs an electric signal having a cycle corresponding to the rotation of an axle generated by a rotation sensor connected to a transmission of a vehicle by a connecting means, and calculates a speed and a traveled distance. With
It is composed of a microcomputer (CPU) that performs data compression processing for shortening the data length when recording the speed and traveling speed obtained by this calculation as digital data on a recording medium.

The digital operation data recorded on the recording medium in the above-described recording device is extremely effective in managing the operation state of the vehicle, and especially after checking what speed the vehicle was traveling, it is possible to detect an abnormal speed. It is effectively used to instruct the driver about safe driving while traveling in the car, and to check the driving condition immediately before the accident when an accident occurs. Is equipped with a device to record some kind of operation.

As described above, when recording the digital operation data on the recording medium, the number of the sales office to which the vehicle belongs and the number of the sales office to which the vehicle belongs so that the digital operation data can be known later. It is also necessary to record the vehicle number and the like together with the recording medium. So, in the recording device,
It has a built-in non-volatile memory that can continue to retain preset unique data indicating a business office number and a vehicle number without power supply.

Conventionally, as one configuration for storing the unique data in the storage means, a dedicated writing machine is prepared, and a connector and an interface circuit for connecting the dedicated writing machine to the recording device are provided. When a recording device is mounted on a vehicle, a vehicle manager or a service person connects the recording device to the recording device and uses the writing device to write the specific data in the nonvolatile memory.

Further, as another configuration, there is a configuration in which a dedicated switch is provided in advance in the recording device and the unique data is written by operating this switch.

[Problems to be Solved by the Invention]

However, as described above, the former type of conventional digital operation data recording device is not economical because it requires a dedicated writer, connector, interface circuit, etc., and the recording device must be removed from the vehicle when the unique data is changed. It has to be troublesome because it must be done.

Further, in the latter recording device, anyone can change the unique data if the switch is provided in a place where it is easy to operate, and if the switch is hidden to prevent such a situation. The operation becomes troublesome.
Moreover, in this configuration, since a switch must be provided, there is a problem that it is not economical.

Therefore, in view of the above-mentioned problems, it is an object of the present invention to provide a digital operation data recording device that allows a specific person to easily and economically write data unique to each vehicle. I am trying.

[Means for solving the problem]

As shown in the basic configuration diagram of FIG. 1, a recording device for digital operation data, which is made according to the present invention to solve the above-mentioned problems, creates a digital operation data by monitoring an operation state of a vehicle and creating digital operation data. Means 111, the internal recording medium 14 rewritably recorded unique data unique to the vehicle, the external recording medium 17 which is detachably mounted, the digital operation data created by the digital operation data creating means 111, In the recording device of the digital operation data including the recording means 112 for recording the unique data recorded in the internal recording medium 14, the identification code recorded inside is included, and the external recording medium 17 is replaced. When the identification recording means 3 is configured to be attachable and the identification code is read from the identification recording means 3, the operation is performed by the operation means 16 to the internal recording medium 14. It said specific data recording, is characterized in that it comprises a unique data writing unit 113 to make changes of the specific data of the internal recording medium 14.

In order to solve the above problems, the digital operation data recording device according to the present invention also has a digital operation data for monitoring the operation state of a vehicle and creating digital operation data as shown in the basic configuration diagram of FIG. and creating means 111, a clock unit 11b ₁ for forming the time data, the operation means 16 for correcting the time of said time meter unit 11b _1, internal recording medium is recorded freely rewritten inherent specific data to the vehicle 14 The digital operation data created by the digital operation data creating means 111, the time data formed by the clock means 11b ₁ and the internal recording medium 14 are recorded on the external recording medium 17 which is detachably attached. In the recording device of the digital operation data, which is provided with a recording means 112 for recording the unique data stored therein, it has an identification code recorded inside, and can be mounted in place of the external recording medium 17. When the identification code is read from the identification recording means 3 formed, and the identification code is read from the identification recording means 3, the recording of the unique data in the internal recording medium 14 according to the operation of the operation means 16, the internal recording It is characterized by comprising a unique data writing means 113 for changing the unique data in the medium 14.

[Action]

In the configuration of FIG. 1 described above, the digital operation data created by the digital operation data creating means 111 by monitoring the operation status of the vehicle and the unique data unique to the vehicle rewritably recorded in the internal recording medium 14 are provided. Recording means 112
When the identification code stored in the external recording medium 17 is read by the identification recording means 3 which is configured to be mounted instead of the external recording medium 17, the operation means 16 is operated. Depending on the specific data writing means
The 113 can write unique data in the internal recording medium 14 and change the unique data in the internal recording medium 14.

Therefore, it suffices to simply prepare the recording means 3 for identification, and it is not bothersome to remove the recording device from the vehicle when the unique data is changed. Further, since the unique data can be recorded by using the operating means 16 only when the identification code is read from the identification recording means 3, it is possible to change the recording of the unique data only by a specific person.

Further, in the configuration of FIG. 1 described above, the clock means 11b ₁
The time data formed by the recording means 112 is also recorded in the external recording medium 17 and, moreover, the unique data is written according to the operation of the operating means 16 for correcting the time of the clock means 11b _1. , Can be changed.

Therefore, it is more economical because it is not necessary to provide a separate operating means.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 shows an embodiment of a digital operation data recording apparatus according to the present invention. The recording apparatus has a microcomputer (CPU) 11 which operates according to a predetermined program. The CPU 11 has a ROM 11a that is a read-only memory that stores a control program that defines its operation, and a RAM 11b that stores various data that is formed during the data processing operation of the CPU 11. The CPU 11 has a rotation sensor 12,
Connector 13, non-volatile memory 14 as an internal recording medium,
Operation unit consisting of display driver 15 and switches SW _{1 to} SW ₃
16 are connected. The connector 13 has an IC memory card as an external recording medium that is detachably attached to the recording device.
A display device 18 is connected to the display driver 15 so that the display driver 15 can display and drive the display device 18. Reference numeral 19 is a pull-up resistor.

The rotation sensor 12 is connected to the transmission of the vehicle by connecting means (not shown), generates a pulse-shaped electric signal having a cycle corresponding to the traveling speed according to the traveling of the vehicle, and supplies this to the CPU 11.

The CPU 11 inputs the electric signal from the rotation sensor 12 by sampling, calculates speed and mileage by calculation, and creates digital operation data consisting of speed and mileage calculated by this calculation. The operation data is recorded in the IC memory card 17 serving as a recording medium. At the time of this recording, work such as data compression processing is performed. When the IC memory card 17 is attached to the recording device and connected to the connector 13, the IC memory card 17
Various data of the card recorded in this is read from 17 or the digital operation data compressed above is stored in the IC.
It is written on the memory card 17.

In the RAM 11b in the CPU 11, as shown in FIG.
Data is incremented per unit time, clear timepiece region 11b _1, IC memory card 17 to form a time data composed of YearMonthDayHHMM is when worn, i.e. have been to "0", IC memory operation start time after installation First time flag area 11 that is set after recording on the card 17, that is, set to "1"
b _2, are set by turning on the switch SW ₁ of the operation portion 16, that is, "1", by +1 address clear, i.e. S flag area 11b ₃ is "0", the operation unit 16 of the switch SW ₂ The U flag area 11b ₄ is set by the ON operation, that is, is set to “1” and is cleared by +1 of the data, that is, is set to “0”. The U flag area 11b ₄ is set by the ON operation of the switch SW ₃ of the operation unit 16, that is, is set to “1”. It is, cleared by writing data to the nonvolatile memory 14, i.e., such as R flag area 11b ₅ which is in the "0" is formed.

In the non-volatile memory 14, in addition to the sales office number and vehicle number to which the vehicle equipped with the recording device belongs, data such as sampling time and speed tolerance used when compressing the digital operation data in the recording device. Unique data unique to the recording device is recorded, and this recording is specific to the vehicle manager or service person who records / changes the unique data in place of the IC memory card 17 as a recording medium. This is performed at any time when the identification card 3 having the code recorded therein is mounted and connected to the connector 13, for example, when the recording device is mounted on the vehicle or when the unique data is changed.

The display 18 is a 4-digit segment display section 18a to 18d.
And two dots 18 between the 2nd and 3rd digits
e, which usually indicates the year, month, day, or hour by switching, and the above-mentioned unique data is stored in a non-volatile memory.
When recording in 14, the address is displayed on the two 7-segment display portions 18a and 18b in the upper digit, and the data is displayed on the two 7-segment display portions 18c and 18d in the lower digit.

The operating section 16 is usually a display 18 as shown in FIG.
The switch SW ₁ is used to change the time normally displayed on the display or to correct the time.When the display of the display 18 is changed to year, month, day or hour,
SW ₂ is operated to raise the display switched by switch SW ₁ , and switch SW ₃ is operated to fix the time set by switch SW ₂ and adjust to the hour. As shown in FIG. 5, the operation section 16 is also used when the unique data is recorded in the non-volatile memory 14, and the switch SW ₁ is the two 7-segment display sections 18a of the upper digit of the display 18. Switch SW ₂ is used to increase the address displayed on and 18b, and switch SW ₃ is used to increase the data to be displayed on the two 7-segment display units 18c and 18d in the lower digit of the display 18. Data set by ₁ and SW ₂ is non-volatile memory
Each is operated when writing and recording at 14 predetermined addresses.

As shown in FIG. 6, the IC memory card 17 has a built-in memory 17a in which one word has 8 bits (1 byte),
The memory 17a is provided with an ID data recording area 17a ₁ for recording ID data and a digital operation data recording area 17a ₂ for recording digital operation data such as speed and mileage. In the ID data recording area 17a ₁ , the business office number, vehicle number, speed sampling time, speed tolerance, operation start time, operation end time, speed record end address, distance record end address, etc. are recorded for each operation. . On the other hand, the digital operation data recording area 17a _2, the speed data recording area 17a ₂₁ and the distance data recording area 17a ₂₂ for recording speed and distance traveled for each operation are recorded.

Note that the above-mentioned speed tolerance indicates an error range allowed at the time of recording, and is related to the accuracy of the speed data collected together with the speed sampling time, and the accuracy of the data obtained by the compression process depends on these. Data will be essential for decompression and analysis on the analysis side.

In addition, the time information consisting of the operation start time and operation end time of each operation is assigned digital operation data during this time by analysis so that the speed and mileage at each point can be known. It's important.

Further, one operation is defined as a period from when the IC memory card 17 is mounted in the recording device and becomes recordable until it is removed and becomes unrecordable.

The CPU 11 inputs the electric signal generated by the rotation sensor 12 when the vehicle is traveling and counts this, and calculates the speed by calculating the difference between the count values at intervals according to the sampling time in the nonvolatile memory 14. Then, digital speed data is created based on the calculated speed, and the created digital speed data is compressed by the speed tolerance in the same nonvolatile memory 14 and recorded in the IC memory card 17. The CPU 11 also monitors whether or not the vehicle has traveled a predetermined distance for each unit of time, creates digital distance data, compresses the created digital distance data, and records it in the IC memory card 17.

When recording the above digital operation data, the CPU 12c records the time data of the clock area 11b _{1 in} the IC memory card 17 if this data is the first data at the start of operation.

By the way, the speed compression process is performed based on the following concept. That is, when an allowable error range (tolerance) for each sampling speed value is set in advance and a straight line that crosses the allowable difference is considered, the straight line represents vehicle speed information within the allowable difference. If the length of the straight line is represented by the number of samples and recorded and the value of the end point of the straight line is also recorded, the vehicle speed during the period covered by the straight line can be regularly managed. In this way, if the vehicle speed is stored only by the length of the straight line and the final data, a large amount of information can be stored with a small amount of data and data compression can be realized.

FIG. 7 shows the vehicle speed V ₀ at the time of sampling from t ₀ to t ₁₁ .
~ V ₁₁ shows the relationship, the dotted line is the vehicle speed error range. At each sampling time, it is checked whether or not there is a straight line that crosses the error range of the data before that time. t ₀ ~ t ₉
The line exists up to, but it does not exist at t ₁₀ . At this time, of the straight lines that include the starting point V ₀ and cross the error range, a straight line L ₂ that passes the upper limit and a straight line L ₁ that passes the lower limit are drawn, and the straight lines L ₁ and L ₂ of the tolerance of the final sampling data V ₉ are drawn.
The midpoint V in the range sandwiched by is the end point data, and the length is "9". The end point becomes the start point of the next straight line, and so on, and so on. The compression speed data recorded in the IC memory card 17 by the above compression processing is recorded in the number of samples and the speed.

IC with digital operation data recorded by recording device
The memory card 17 is taken out and mounted in an analysis device (not shown) in order to analyze the digital operation data therein.

The operation of the printing apparatus outlined above will be described in detail below with reference to the flowchart of FIG. 8 showing the work executed by the CPU 11 according to the control program.

The CPU 11 starts its operation when its power is turned on, initializes it in the first step S1, and clears the initial flag to "0", that is, clears it. Next, in step S2, it is determined whether or not the card write condition is OK. In this determination, the vehicle ignition (IG
N) Whether the switch is on or the card is installed in a recordable state is determined. This step
When the determination in S2 is YES, the process proceeds to step S3, the data is read from the card attached here, and the subsequent step S4
In step S3, it is determined whether or not there is a predetermined specific code in a specific address (address) of the data read in step S3. When the determination in step S4 is NO, the mounted card is an IC as an external recording medium.
When it is determined that the memory card 17 is present, the process proceeds to step S5, and when the determination is YES, the attached card is the recognition card 3
Then, the process proceeds to step S15 described later.

In step S5, it is determined whether the initial flag region 11b ₂ in RAM11b is "1", the flow proceeds to step S6 when this determination is NO, the watch area here in RAM11b
After recording the time data of 11b ₁ as the operation start time in the ID data recording area 17a ₁ , the process proceeds to step S7, and “1” is set in the initial flag area 11b ₂ . After that, the process proceeds to step S8, where speed processing, that is, speed calculation, creation of digital speed data, compression of the data, recording in the digital speed data recording area 17a _{21 of} the IC memory card 17, and the like are performed. After that, the process proceeds to step S9, where the tasks such as distance calculation, creation of digital distance data, compression of the data, recording in the digital distance data recording area 17a _{22 of} the IC memory card 17 are performed. Then the process proceeds to step S10, where clock processing, namely the process proceeds to step S11 after performing increment watches constituted by the clock region 11b ₁ in the RAM 11b, the work of such modification, the display here time display After performing step 18, the process returns to step S2.

Incidentally, if "1" is set in the first flag area 11b ₂ in step S7 as described above, followed by step S5
Becomes YES, and after execution of step S5, steps S6 to S7 are skipped and the process proceeds to step S8.

Further, when the determination in step S2 is NO,
That is, when the card writing condition is not is OK, "1" in the first flag area 11b ₂ proceeds to step S12
It is determined whether or not is set. This step S1
When the determination result in 2 is NO, the process returns to step S2 and the determination result is Y.
If ES, proceed to step S13. In step S13, the end processing, that is, the time data of the clock area 11b ₁ is set as the operation end time, and the ID data recording area of the IC memory card 17 is set.
The first flag area 11b ₂ proceeds after performing work such as recording the 17a ₁ to step S14 after the "0" returns to the step S2.

The above operation is performed as an IC as an external recording medium as a card.
When the recognition card 3 other than the IC memory card 17 is mounted as the card when the memory card 17 is mounted, the determination in step S4 is YES and the process proceeds to step S15. In step S15, the unique data recorded in the non-volatile memory 14 as an internal recording medium is read and stored in a work area (not shown) in the RAM 11b. Then, in the following step S16, as shown in FIG. 5, the first address of the read unique data is set to the two upper display digits 18a and 18b of the display unit 18.
Then, the data of the address is displayed on the two lower display digits 18c and 18d of the display 18, respectively.

After that, the process proceeds to step S17, and the switch input process is performed with the input by operating the switches SW _{1 to} SW ₃ of the operation unit 16. In this switch input process, the switch is switched to the S flag area 11b ₃ in the RAM 11b in response to turning on of the switch SW _1.
“1” is set in the U flag area 11b ₄ in response to the turning on of SW _{2 and in} the R flag area 11b ₅ in response to the turning on of the switch SW ₃ .

It determines whether "1" to the S flag area 11b ₃ proceeds to step S18 after the switch input process of step S17 has been set. Now, in step S17, when the switch SW ₁ is turned on, the process proceeds to step S19 becomes YES determination at step S18, where displayed in the upper digit two display portions 18a and 18b of the current display 18 Incrementing the address that is By this increment of the address, the incremented address is displayed on the display units 18a and 18b, and the data corresponding to the address is displayed on the display units 18c and 18d of the lower two digits. Then the process proceeds to step S20, where the card write condition proceeds from the S flag area 11b ₃ to "0" in step 21 is equal to or OK, the this determination
If YES, the process returns to step S16, and if NO, the process returns to step S2.

Further, in step S17, when the switch SW ₂ is turned on, the process proceeds to step S22 and determination in step S18 becomes NO, and "1" where the U flag area 11b ₄
Is set, but this step
The determination in S22 is YES and the process proceeds to step S23, where the data currently displayed on the display 18 is incremented by one. By this increment of the data, the incremented data is displayed on the display units 18c and 18d of the lower two digits of the display unit 18. Then the process proceeds to step S24, the process proceeds where after the U flag area 11b ₄ to "0" in step S21.

Further, in step S17, when the switch SW ₃ is turned on, the process proceeds to step S25 determination in step S18 and S22 becomes NO, and wherein either a "1" to R flag area 11b ₅ is set not If YES in step S25, the process proceeds to step S26, in which the unique data currently stored in the work area of the RAM 11b is written and recorded in the nonvolatile memory 14 as an internal recording medium. To do. Then proceed to step S27, where R
It proceeds flag area 11b ₅ after the "0" in step 21.

Note that steps S16 to S28 described above are repeatedly executed until the determination in step S21 becomes NO, that is, until the identification card 3 is removed, and when no switch is operated in step S17, step S1
8, S22 and S25 are all NO, and the determination in step S21 is NO.
Repeat these steps until.

By the way, in the above-mentioned embodiment, the office number, the vehicle number, the sampling time and the speed tolerance are recorded as the unique data, but other than this, for example, the pulse per rotation of the rotation sensor 11 mounted on the vehicle. Number (4,
8, 10, 16, 20, 25) settings are possible.

Further, in the above-mentioned embodiment, the switch of the operation section for correcting the clock time is used as the operation means, but a switch dedicated to this is provided, or the display 18 can be switched between odd and trip. In this case, the odd / trip changeover switch and the drip reset switch provided in this case may also be used as operating means.

〔effect〕

As described above, according to the present invention, the unique data unique to the vehicle, which is recorded together with the digital operation data created by monitoring the operation state of the vehicle on the external recording medium, can be mounted instead of the external recording medium. When the identification code recorded in the configured recording means for identification is read, the recording can be changed in accordance with the operation of the operating means. Vehicle specific data can be written easily and economically by a specific person.

Further, according to the present invention, the unique data unique to the vehicle, which is recorded together with the time data on the external recording medium, can be recorded and changed in accordance with the operation of the operation means for performing the time adjustment, and the data can be separately provided. It is more economical because it does not require any operating means.

[Brief description of drawings]

FIG. 1 is a block diagram showing a basic configuration of a digital operation data recording device according to the present invention, FIG. 2 is a diagram showing an embodiment of a digital operation data recording device according to the present invention, and FIG. 3 is in FIG. FIG. 4 is a diagram showing the internal configuration of the RAM, FIG. 4 and FIG. 5 are explanatory diagrams for explaining how to use the operation unit 16 and the display unit in FIG. 2, and FIG. 6 is a recording area of the IC memory card. FIG. 7 is a diagram for explaining an example of a method of compressing digital speed data, and FIG. 8 is a flow chart showing the work performed by the CPU in FIG. 111 …… CPU (means for creating digital operation data), 112 …… C
PU (recording means), 113 ... CPU (unique data writing means),
12b ₁ …… Clock area (clock means), 14 ・ ・ ・ Non-volatile memory (internal recording means), 16 …… Operation part (operation means), 17 ……
IC memory card (external recording medium), 3 ... Identification card (identification recording means).

Claims (2)

[Claims] 1. A digital operation data creating means for monitoring operation status of a vehicle and creating digital operation data, an internal recording medium in which rewriting specific data unique to the vehicle is rewritably mounted, and detachably mounted. In a recording device for digital operation data, which comprises an external recording medium for recording the digital operation data created by the digital operation data creating means and the unique data recorded in the internal recording medium, the internal operation data is recorded internally. The identification recording means having the identified identification code and configured to be mounted in place of the external recording medium; and when the identification code is read from the identification recording means, the identification recording means is operated in response to the operation of the operating means. A unique data writing unit for recording the unique data in an internal recording medium and changing the unique data in the internal recording medium. Recording device of digital navigation data. 2. A digital operation data creation means for monitoring the operation status of a vehicle and creating digital operation data, a clock means for forming time data, an operation means for adjusting the time of the clock means, and a vehicle. To the internal recording medium rewritably recording the unique data unique to the, and the external recording medium that is detachably mounted, the digital operation data created by the digital operation data creating means, and the time data formed by the clock means. And a recording device for recording the unique data recorded on the internal recording medium, wherein the recording device has a discrimination code recorded inside, and can be mounted in place of the external recording medium. And an internal recording medium according to an operation of the operating means when the identification code is read from the identifying recording means. It said specific data recording, and a unique data writing means for performing a change of the specific data in the internal recording medium, a recording apparatus for digital operational data, characterized in that to.