JPH10171941A - Data carrier system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a communication time by stopping transmission of wasteful data (data having a communication error) from a reader to an external controller. SOLUTION: When an operator inserts a key 19A into a R/W device 31, the device 31 reads running data from a transponder 20 of the key 19A and gives it to a personal computer 30. In the case of this structure, the device 31 decides a communication error from the transponder 20 to the device 31, when an communication error is not detected, the device 31 sends data to the personal computer 30, and when a communication error is detected, the device 31 commands the resending of data to the transponder 20. With this, because the device 31 does not send wasteful data (data having a communication error) to the personal computer 30 any more, a communication time is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data carrier system for transporting vehicle data using a data carrier device such as an IC card.

[0002]

FIG. 23 shows a conventional configuration of the data carrier system. Here, vehicle data (starting date and time of the engine, etc.) is recorded in the memory 1a of the IC card 1, and when the IC card 1 is inserted into the reader device 2 and the personal computer 3 (hereinafter, referred to as the personal computer 3) is operated. Then, the command “Read data” is transmitted from the personal computer 3 to the reader device 2. Addresses 0 to 100 of the memory 1a are vehicle data and 101 to 16383 are initialization data.

[0003] When receiving a command from the personal computer 3, the reader device 2 writes “address 0 (start address S)
A) to send data of 16383 (end address EA) ", and transfer the data received from the IC card 1 to the personal computer 3. Then, PC3
Determines a data communication error, and if there is no communication error, displays vehicle data at addresses 0 to 100 on the display device 3.
Display in a. If there is a communication error, a resend command is transmitted to the IC card 1 through the reader device 2 and the
Data is re-received from the C card 1 through the reader device 2. Communication between the IC card 1 and the reader 2 and communication between the reader 2 and the personal computer 3 are performed serially.

However, in the above-described conventional configuration, unnecessary data (address 101) is not transmitted from the reader device 2 to the personal computer 3.
(Initialized data of デ ー タ 16383, data with a communication error) is transmitted, and the communication time tends to be unnecessarily long. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a data carrier system capable of reducing a communication time.

[0005]

According to a first aspect of the present invention, there is provided a data carrier system comprising: a data carrier device for storing vehicle data; and a data carrier device for reading data from the data carrier device in response to a command signal from an external control device. A reader device for transmitting to an external control device, the reader device has an error detection unit for detecting a communication error from the data carrier device to the reader device, and when no communication error is detected, the data carrier device Is transmitted to the external control device, and when a communication error is detected, the data carrier device is instructed to retransmit the data.

According to the above means, the reader device detects a communication error and transmits only data having no communication error to the external control device. For this reason, useless data (data with a communication error) is not transmitted from the reader device to the external control device, and the communication time is shortened.

In the data carrier system according to the present invention, when a communication error is not detected, the reader device operates to receive data from the data carrier device and transmits data received earlier from the data carrier device to the external control device. The feature is that the operations are performed in parallel. According to the above means, the operation of receiving data from the data carrier device and the operation of transmitting data previously received from the data carrier device to the external control device are performed in parallel. For this reason, the communication time is further reduced as compared with the case where data is received from the data carrier device and then transmitted to the external control device in a lump.

The data carrier system according to the third aspect is characterized in that, when a communication error is detected, the reader device instructs the data carrier device to retransmit data from which the communication error has been detected. According to the above means, the transmission is restarted serially from the data in which the communication error has occurred. For this reason, the communication time is further reduced as compared with the case where transmission is restarted from the initial data at the time of a communication error.

According to a fourth aspect of the present invention, there is provided a data carrier system for storing vehicle data and reading data from the data carrier device in response to a command signal from an external control device and transmitting the data to the external control device. A data determination unit that determines that the data from the data carrier device is the final vehicle data, and when the final vehicle data is detected, the external control device It is characterized in that the transmission of subsequent data to is stopped.

According to the above means, the reader device determines the final vehicle data and stops transmission of the subsequent data to the external control device. For this reason, useless data (initialization data and the like) is not transmitted from the reader device to the external control device, and the communication time is shortened.

According to a fifth aspect of the present invention, in the data carrier system, the data carrier device and the reader device have an antenna coil, and communication between the data carrier device and the reader device is performed in a non-contact manner through the antenna coil. It is characterized in that at the time of communication between devices, operating power is supplied to the data carrier device from the antenna coil of the reader device through the antenna coil of the data carrier device in a non-contact manner. According to the above means, at the time of communication between the data carrier device and the reader device, the data carrier device receives operating power from the reader device in a non-contact manner and performs data communication. For this reason, it is not necessary to incorporate a power source such as a battery in the data carrier device, so that the data carrier device is prevented from being large-sized, and the trouble of replacing the battery is eliminated.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will now be described with reference to FIGS.
This will be described with reference to FIG. First, in FIG. 2, the construction vehicle 11 is equipped with a vehicle-side controller 12 corresponding to a vehicle-side control device. As shown in FIG. 9, the vehicle-side controller 12 includes a control circuit 13 mainly composed of a microcomputer, a power amplifier 14, and a detection circuit 1.
5, an amplifier 16, two antenna coils 17a (only one is shown), and two resonance capacitors 17b (only one is shown). One of the antenna coils 17a is an ignition key cylinder (not shown). ), And the other antenna coil 17a is disposed on a door key cylinder (not shown). Reference numeral 17 denotes a resonance circuit including an antenna coil 17a and a resonance capacitor 17b.

The control circuit 13, power amplifier 14, detection circuit 15, amplifier 16, and two resonance capacitors 17b
It is stored in a box 18 (see FIG. 10). As shown in FIG. 10, mode switches 18a to 18e, a set switch 18f,
Two digital switches 18g, LEDs 18a1 to 18e1, L
The ED 18h is mounted, and the control circuit 13 sets functions according to the operation contents of each of the switches 18a to 18g, as described later, and controls the LEDs 18a1 to 18e1 and 18d.
The function setting state is notified by lighting / flashing h.

Normal key 19A and master key 19B
As shown in FIG. 2, the main body 19a and the key grip 1
9b, and each key grip 19
The transponder 20 is disposed in the area b. This transponder 20 corresponds to a data carrier device, and as shown in FIG.
2, control circuit 23, reset circuit 24, CR oscillation circuit 2
5, a nonvolatile memory 26 composed of an EEPROM, a detection circuit 27, and a modulation circuit 28. The normal key 19
A is a key carried by the driver for driving, and a master key 19B is a dedicated key for registering an ID code or the like.

The resonance circuit 21 includes an antenna coil 21a and a resonance capacitor 21b.
When the main body portion 19a of each of 9A and 19B is inserted into an ignition key cylinder or a door key cylinder, the antenna coil 17a on the vehicle side and the antenna coil 21a of the resonance circuit 21 are electromagnetically connected.

A control program is stored in the control circuit 13 on the vehicle side. The control circuit 13 turns on and off the power amplifier 14 based on the control program.
A power signal (a carrier signal shown in FIG. 11A) whose level decreases at a predetermined timing is transmitted from each antenna coil 17a.

Accordingly, the main body 19 of the keys 19A, 19B
a is inserted into the ignition key cylinder or the door key cylinder, and when the antenna coil 17a on the vehicle side and the antenna coil 21a on the key side are electromagnetically connected, the power signal from the antenna coil 17a on the vehicle side receives the antenna signal on the key side. It is provided to the coil 21a in a non-contact manner.
The resonance frequency of the resonance circuit 21 is set equal to the frequency band of the power signal transmitted from the vehicle.

The power supply circuit 22 includes a rectifying diode 22
a, constant voltage diode 22b, smoothing capacitor 22
c, a constant voltage circuit 22d, etc., which rectifies and smoothes the power signal received by the antenna coil 21a on the key side to create a DC power supply. Control circuit 2
Numeral 3 is mainly composed of a microphone computer. The DC power generated by the power supply circuit 22 is connected to a control circuit 23.
The control circuit 23 is driven by a DC power supply from the power supply circuit 22.

The reset circuit 24 comprises a diode 24a and a capacitor 24b.
The control circuit 23 is kept in the power-on reset state until the DC power supplied to DD reaches a predetermined level. The CR oscillation circuit 25 includes a resistor 25a and a capacitor 25b, and determines a clock frequency of the control circuit 23.

Addresses 0 to 204 of the nonvolatile memory 26
7 (8 bits × 2048 addresses), as shown in FIG.
It is divided into pages 0 to 15 (the leftmost number is the boundary address of pages 0 to 15). And page 0
15 is divided into an operation data area for writing operation data and a user data area for writing user data such as optional mounting data, and addresses 0 to 31 of the operation data area are set as a system area. In the system area, an ID code is recorded in advance.

The operation data and user data correspond to vehicle data. The system area stores the following key information in addition to the ID code (each key information will be described later).

System code, password, operation data area password setting information, user data area password setting information, user data area write protection setting information, area setting information, recording start page, R / W update counter

The detection circuit 27, as shown in FIG. 7, comprises a detection diode 27a, a capacitor 27b, etc., and shapes the power signal received by the key-side antenna coil 21a, and also removes noise from the power signal. Remove,
It is given to the control circuit 23 on the key side. FIG. 11A shows a power signal supplied from the detection circuit 27 to the control circuit 23.

As shown in the figure, the control circuit 23 on the key side
Detects the input of SOM (Start Of Message),
Data reading is started, and the command content of the power signal transmitted from the control circuit 13 on the vehicle side is determined based on the subsequent power signal. Then, based on the determination result, the user data is read from the user data area of the nonvolatile memory 26, and the operation data (corresponding to the operation information) is written in the operation data area.

The time constant of the detection circuit 27 is set smaller than the time constant of the power supply circuit 22 in order to enable shaping of the power signal. Further, ΔT in FIG. 11 corresponds to the off time of the power amplifier 14 by the control circuit 13 on the vehicle side.

As shown in FIG. 7, the modulation circuit 28 includes a transistor 28a and a resistor 28b. The control circuit 23 on the key side turns on and off the transistor 28a to reduce the impedance of the resonance circuit 21. And responds to the command content from the control circuit 13 on the vehicle side. Then, in synchronization with the impedance change of the resonance circuit 21, the amplitude of the response signal (the carrier signal shown in FIG. 11B) received by the vehicle-side antenna coil 17a changes.

The vehicle-side detection circuit 15 shapes the response signal received by the antenna coil 17a and supplies the response signal to the control circuit 13 through the amplifier 16. FIG. 11B shows a response signal provided to the control circuit 13. As shown in the figure, after the frame synchronization, the control circuit 13
When the input is detected, data reading is started, and the response content from the key-side control circuit 23 is determined based on the subsequent response signal.

Next, the operation of the above configuration will be described. First, in communicating data between the vehicle-side controller 12 and the transponder 20, the following preparations are made.

<Registration of key (when using master key 19B)> Insert the master key 19B into the ignition key cylinder. Then, after the starter switch 11a (see FIG. 9) of the vehicle 11 is turned off for more than 10 seconds, the starter switch 11a is turned to ACC. Then, the control circuit 13 on the vehicle side transmits a power signal “send an ID code” to the control circuit 23 on the key side when the power amplifier 14 is turned on and off.

Upon receiving the power signal, the control circuit 23 on the key side is started up, determines the command content of the power signal, and reads the ID code from the system area of the nonvolatile memory 26.
Then, when the transistor 28a of the modulation circuit 28 is turned on and off, the ID code is transmitted to the control circuit 13 on the vehicle side.

The control circuit 13 on the vehicle side has a non-volatile memory 13a (see FIG. 9) composed of an EEPROM, and the non-volatile memory 13a has a master key 19a.
The ID code of B is stored in advance. The control circuit 13 sends the master key 19 from the control circuit 23 on the key side.
When the ID code of B is received, the ID code is read from the nonvolatile memory 13a and compared with the ID code from the key side. In this case, since both match, the LED 18
a1 blinks to notify that the mode has shifted to the key registration mode.

After confirming the blinking of the LED 18a1, the starter switch 11a is turned off, and the normal key 19A is inserted into the ignition key cylinder within 10 seconds.
Turn to ACC. Then, the control circuit 13 of the vehicle reads out the ID code from the normal key 19A according to the above-described procedure and writes the ID code into the nonvolatile memory 13a. And LED18a1 is 5
The normal key 19 </ b> A registration is notified by lighting for two seconds.

When the LED 18a1 is turned off, the starter switch 11a is turned off, and another normal key 19A is inserted into the ignition key cylinder within 10 seconds.
Turn to CC. Then, the control circuit 13 of the vehicle reads out the ID code from the normal key 19A according to the above-described procedure and writes the ID code into the nonvolatile memory 13a. And LED18a1 is 5
By lighting for a second, the registration of the normal key 19A is notified.

When the above-mentioned registration is performed for all the normal keys 19A, after confirming that the LED 18a1 is turned off,
Turn the starter switch 11a to START. Then
The control circuit 13 of the vehicle recognizes that the key registration has been completed, and blinks all the LEDs 18a1 to 18e1 and 18h a plurality of times (for example, twice) to notify the end of the key registration. Note that the maximum number of registered normal keys 19A is three,
Two master keys 19B are prepared.

<Registration of Master Code> The master code is necessary when registering a key without using the master key 19B, and is registered in the following procedure. Insert the normal key 19A into the ignition key cylinder and
Then, the mode switches 18a to 18e are selectively pressed five times. Here, the control circuit 13 on the vehicle side includes:
Numerical values 1 to 5 are stored in correspondence with the mode switches 18a to 18e.
Set the master code according to whether or not is operated. For example, the mode switches 18e, 18d, 18c, 18b,
18a are sequentially operated, the master code is changed to “54”.
321 ”.

When the mode switches 18a to 18e are selectively operated five times, the set switch 18f is continuously pressed for 4 seconds or more. Then, the control circuit 13 on the vehicle side determines that the input of the master code is completed, and registers the master code in “54321”. Then, the LED 18h blinks a plurality of times (for example, five times) to notify the completion of the registration of the master code.

<Registration of key (when the master key 19B is not used)> Insert the normal key 19A into the ignition key cylinder, let the starter switch 11a be OFF for at least 10 seconds, and then turn to ACC to input the master code. I do. The input of the master code is performed in the same procedure as described in the section <Registering the master code>.

Then, the control circuit 13 on the vehicle side uses the LED
18a1 blinks to notify that the mode has shifted to the key registration mode. Then, the ID code is read from the normal key 19A according to the above-described procedure, and is written and registered in the nonvolatile memory.
For key registration after the second key, the master key 1
This is the same as when 9B is used.

<Registration of Security Code> The security code is necessary when the system is stopped due to loss of the registration key, failure, or other reasons, and is registered in the following procedure. The stop of the system will be described later.

Normal key 19A or master key 19
B is inserted into the ignition key cylinder and the following (1)
The operations of (2) and (2) are set as one set, and this is performed four sets. (1) Set the key 19A or 19B to “(OFF) → AC
Turn N (C is an integer from 1 to 9) times to “C → OFF”. (2) Set the key 19A or 19B to “(OFF) → HE
Turn only once from “AT → OFF”. For example, the first set is N = 1, the second set is N = 2,3
When the set is N = 3 and the fourth set is N = 4,
The control circuit 13 on the vehicle side recognizes that the personal identification code is “1234”.

After inputting the password, the key 19A or 19B is held at HEAT for 4 seconds or more. Then, the control circuit 13 of the vehicle ends the registration of the personal identification code “1234”, and notifies the completion of the registration of the personal identification code by blinking the LED 18h a plurality of times (for example, five times).

<Setting of Internal Clock> The internal clock is a reference for detecting operation data such as the engine start date and time, and is set in the following procedure.

The starter switch 11a is operated by the normal key 19A.
Is turned to ACC, and the set switch 18f is continuously pressed for 4 seconds or more. Then, the control circuit 13 on the vehicle side sets L
The EDs 18a1 to 18e1 and 18h are repeated a plurality of times (for example,
Times), after the LED 18h stops blinking,
Only the EDs 18a1 to 18e1 are kept in a blinking state to notify that the mode has shifted to the clock setting mode.

When the set switch 18f is operated, the operation of the digital switch 18g and the operation of the set switch 18f are set as one set, and by performing these five sets,
Enter year, month, day, hour, and minute sequentially. Then, the control circuit 13 on the vehicle side sets the year, month, day, hour, and minute of the internal clock based on the output signal from the digital switch 18g. At the same time, the LEDs 18a1 to 18e1 are sequentially turned off each time the setting of year, month, day, hour, and minute is completed. And
The LEDs 18a1 to 18e1 and 18f are turned a plurality of times (for example,
The completion of the setting of the internal clock is notified in accordance with the flashing.

When the starter switch 11a is turned to ACC in performing <registering the master code>, <registering the password code>, and <setting the internal clock>, the control circuit 13 on the vehicle side reads "ID code Is sent to the control circuit 23 on the key side. Then
The key-side control circuit 23 reads the ID code from the system area of the non-volatile memory 26 and controls the vehicle-side control circuit 1
Send to 3.

When receiving the ID code, the control circuit 13 on the vehicle side receives the ID code registered from the nonvolatile memory 13a.
The code is read and compared with the ID code from the key side.
Here, only when the ID code from the key side exists in the read ID code, <register master code>, <register password>, and <set internal clock> are allowed.

<Assigning the work mode to the mode switch> The mode switches 18a to 18e are for causing the control circuit 13 on the vehicle side to recognize which work is currently being performed (for example, the work in mode 1 is performed). When the mode switch 18a is in operation, the mode switch 18a is operated to inform the control circuit 13 that the operation of the mode 1 is being performed), the work mode assigned near the mode switches 18a to 18e is clearly indicated, and Is preferably prevented.

Next, the operation of the above configuration will be described. <Door Security Function> The normal key 19A is inserted into the door key cylinder, turned to the right (lock side) or left (unlock side), and then returned to the original position. Then, the vehicle-side control circuit 13 transmits a power signal “transmit an ID code” to the key-side control circuit 23 and determines whether the ID code received from the key-side control circuit 23 is registered. I do. For example, when the ID code from the key side is registered, the lever on the back side of the door key cylinder is linked to the door lock mechanism, and the door is unlocked. Therefore, in this state, turning the normal key 19A to the left (unlocked side) unlocks the door.

When the ID code from the key side is not registered, the control circuit 13 on the vehicle side records in the nonvolatile memory 13a that there is an abnormality on the security surface. At the same time, an operation of sounding a horn (not shown) of the vehicle 11 for a predetermined time (for example, 30 seconds) and an operation of blinking a light (not shown) of the vehicle 11 for a predetermined time (for example, 4 minutes) are performed. Notifies that there was an abnormality on the surface. Reference numeral 11b in FIG. 9 denotes a door switch that is turned on in accordance with the rotation of the door key cylinder, and the control circuit 13 on the vehicle side determines that the normal key 19A is turned based on an on signal from the door switch 11b. Is detected.

<Immobilizer Function> Insert the normal key 19A into the ignition key cylinder and turn it to ACC or HEAT. Then, the vehicle-side control circuit 13 transmits a power signal “transmit an ID code” to the key-side control circuit 23 and determines whether the ID code received from the key-side control circuit 23 is registered. I do.

For example, when the ID code from the key side is registered, the control circuit 13 on the vehicle side turns on the main power supply of the vehicle 11 and permits the start of the engine. Also,
If the ID code from the key side is not registered, the non-volatile memory 13a indicates that there is an abnormality on the security surface.
To record. At the same time, the horn sounds and the light flashes to notify that there is an abnormality on the security surface.

The control circuit 13 on the vehicle side has the following (1)
Alternatively, when the operation of (2) is detected, the sounding of the horn and the blinking of the light are stopped. (1) The starter switch 11a is turned to HEAT or ACC by the registered normal key 19A or master key 19B. (2) Turn the door switch 11b with the registered normal key 19A or master key 19B (either right or left).

<Operation Data Recording Function> When the engine is started, the vehicle-side control circuit 13 sends a power signal “record operation data” to the key-side control circuit 23.
A power signal indicating “the engine start date and time” is transmitted. Then, the control circuit 23 on the key side writes the start date and start time of the engine in the operation data area of the nonvolatile memory 26. In this case, since the system area is provided in the first part of the operation data area, the operation data is written with address 32 of page 0 as the start address.

When the engine is started, the control circuit 13 on the vehicle side sets the ON time T of the mode switches 18a to 18e.
1 to T5, and the off time T0 during which none of the mode switches 18a to 18e are turned on.

For example, when the mode switch 18a corresponding to the mode 1 is operated, the control circuit 13 on the vehicle measures the operation time T1 of the mode 1 as the operation time counter 1 is added. In this state, when the mode switch 18b corresponding to the work mode 2 is operated, the work time counter 2 is added, and the work time T2 of the work mode 2 is measured.

The control circuit 13 on the vehicle side determines the on-time T1 to
When T5 and OFF time T0 are measured, the work mode is transmitted to the control circuit 23 on the key side at intervals of 6 minutes, and the work mode for each unit time is recorded (see FIG. 14). This working mode is
The one with the longest working time among the six minutes is transmitted. For example, the ON time of the mode switch 18a is one minute,
If the ON time of the mode switch 18b is 2 minutes and the ON time of the mode switch 18c is 3 minutes, the control circuit 13
Transmits that the work mode for 6 minutes is “mode 3” corresponding to the mode switch 18c. The off time T0
Is the longest, "mode 0" is transmitted.

<Security History Function> As described above, the control circuit 13 on the vehicle side records the security history while the engine is stopped. When the engine is started, the security memory is read from the nonvolatile memory 13a. , And transmits a command signal “record data” and data “security history”. Then, the key-side control circuit 23 writes “security history” in the operation data area of the nonvolatile memory 26.

<System stop function> The normal key 19A or the master key 19B (a key that is not registered) is inserted into the starter switch 11a, and the operation described in the section <Registration of security code> is performed. Enter your PIN code. Then, the control circuit 13 on the vehicle side sets <
Operation data recording function>, <immobilizer function>, <
When the door security function> is stopped, and the LED 18h is turned on and off a plurality of times (for example, five times), a system down is notified.

The system can be stopped by inserting the normal key 19A or the master key 19B (a key that is not registered) into the door key cylinder and inputting a password. In this case, the input of the personal identification code is performed by turning the key 19A or 19B like "(OFF →) right (lock side) → OFF". The input is confirmed as “(OFF) → left (unlocked side) → O
FF ”.

<System Setup> In the system down state, the normal key 19A or the master key 19B
(A key that is not registered can also be used) Starter switch 1
1a, and the user inputs the personal identification code in accordance with the operation described in the section <Registration of personal identification code>. Then
The control circuit 13 on the vehicle sets up the system.

As shown in FIG. 2, a desktop personal computer 30 (hereinafter, referred to as a personal computer 30) corresponding to an external control device is installed in the office 29. A reader / writer device 31 (hereinafter, referred to as an R / W device 31) corresponding to the device is connected. Hereinafter, the R / W device 31 will be described in detail.

In box 32, as shown in FIG.
A power supply circuit 33 and a control circuit 34 mainly composed of a microcomputer are provided. And box 3
2, a jack 32a (see FIG. 6) and a power switch 32b (see FIG. 4) are attached. As shown in FIG.
a, and the outlet 35b of the AC adapter 35 is plugged into a commercial AC power supply (not shown).
2b, the control circuit 34 through the power supply circuit 33
Is supplied with power, and the control circuit 34 is driven. Note that the control circuit 34 corresponds to an error detection unit and a data determination unit.

As shown in FIG. 5, a green indicator lens 32c is attached to the box 32. Then, in the box 32, as shown in FIG.
The control circuit 34 supplies power to the LED 36a when the power switch 32b is turned on. This illuminates the indicator lens 32c,
Notifies that the power is on.

A serial interface 37 is provided in the box 32. In box 32,
As shown in FIG. 6, a connector 32d is attached, and as shown in FIG.
When the connector 30b is inserted, the control circuit 34 and the personal computer 30 are connected via the serial interface 37, and the communication between the personal computer 30 and the control circuit 34 is performed serially.

In the box 32, as shown in FIG.
A cylinder 38 is provided. The cylindrical body 38 has a rectangular cross section in which one end surface is open and the other end surface is closed, and one end surface 38a of the cylindrical body 38 penetrates the upper plate of the box 32 as shown in FIG. It is exposed to the outside.

In the box 32, as shown in FIG.
A key detection switch 39 is provided, and a plunger 39a of the key detection switch 39 is disposed in the cylinder 38. When the main body 19a of the normal key 19A or the main body 19a of the master key 19B is inserted into the cylindrical body 38 from one end surface 38a of the cylindrical body 38 (hereinafter, referred to as a key insertion port 38a), the plunger 39a is moved The key detection switch 39 is turned on by being pressed downward by the portion 19a.

An antenna coil 40 is provided at one end of the cylindrical body 38.
When the main body 19a of the normal key 19A or the main body 19a of the master key 19B is inserted into the key insertion port 38a, the antenna coil 40a and the antenna coil 21a on the key side are electromagnetically connected. Connected.
Reference numeral 40b in FIG. 3 indicates a resonance capacitor that forms the resonance circuit 40 together with the antenna coil 40a.

As shown in FIG. 3, the antenna coil 40a is connected to a control circuit 34 via a power amplifier 41, and the control circuit 34 receives a command signal transmitted from the personal computer 30 through the serial interface 37. A power signal (carrier signal) whose level decreases at a predetermined timing as the power amplifier 41 is turned on and off
From the antenna coil 40a to the antenna coil 2 on the key side.
1a.

This power signal is the same as that supplied from the control circuit 13 on the vehicle side to the control circuit 23 on the key side, and the detection circuit 27 on the key side, as shown in FIG. The power signal received through the coil 21a is shaped and given to the control circuit 23. Then, the control circuit 2
3 starts reading data in response to detecting the input of the SOM, and determines the content of the command based on the subsequent power signal. When the transistor 28a of the modulation circuit 28 is turned on and off, the R / R
A response signal is transmitted to the antenna coil 40a on the W device side.

In the box 32, as shown in FIG.
A detection circuit 42 and an amplifier 43 are provided. The detection circuit 42 shapes the response signal received by the antenna coil 40a, and supplies the response signal to the control circuit 34 through the amplifier 43.
This response signal is similar to the response signal transmitted from the control circuit 23 on the key side to the control circuit 13 on the vehicle side.
As shown in FIG. 11B, the control circuit 34 on the R / W device side starts reading the response signal upon detecting the input of the SOM after the frame synchronization, and based on the subsequent response signal. To determine the response content.

As shown in FIG. 5, a red indicator lens 32d is attached to the box 32. In the box 32, as shown in FIG.
6b, and a control circuit 34 on the R / W device side.
Illuminates the indicator lens 32d when power is supplied to the LED 36b, and the R / W device 31 and the key 19
A is notified that communication is being performed with A (or 19B).

Next, the operation of the above configuration will be described. First, data communication performed between the personal computer 30, the R / W device 31, and the key 19A will be described. As shown in FIG. 1A, when a command signal “Read data (specifically, operation data, user data, etc.)” is output from the personal computer 30, the control circuit 34 on the R / W device side. Receives a command signal from the personal computer (PC) 30 and outputs a power signal “Read data” to the control circuit 23 on the key side when the power amplifier 41 is turned on and off as shown in FIG. After that, it enters the receiving state.

When the control circuit 23 on the key side receives the power signal from the control circuit 34 on the R / W device side, it activates and determines the command content of the power signal as shown in FIG. ). When the contents of the command are determined, a transmission state is established, and data 1, 2,... Are read from the nonvolatile memory 26, and the transistor 28a of the modulation circuit 28 is turned on / off based on the data 1, 2,. .. Are transmitted to the control circuit 34 on the / W device side.

When the control circuit 34 of the R / W device receives the data 1, 2,..., It synchronizes the frames as shown in FIG.
1, CRC1, and EOM are detected. Next, as shown in (d), a communication error of data 1 is detected based on the previously received CRC1 and data1 while detecting SOM, data2, CRC2, and EOM. If there is no error in the data 1, the data 1 is transmitted to the personal computer 30 while receiving the data 2 as shown in FIG.

Note that CRC is one type of error detection code.
Cyclic Redundancy Check. Also, EOM
Is a kind of code indicating the end of data, and End Of Message
ge is an abbreviation for In addition, the control circuit 23 on the key side transmits R /
The transmission bit rate to the control circuit 34 on the W device side is R /
The transmission bit rate from the control circuit 34 of the W device to the personal computer 30 is lower than the transmission bit rate.

The control circuit 34 of the R / W device repeats the operation of detecting an error in the previous data while receiving the data, and the operation of transmitting the previous data to the personal computer 30 while receiving the data. Here, as shown in (d), data m + 1
When the error of the data m is detected while receiving the data, first, the power amplifier 41 is turned off for a predetermined time, (b)
A stop pulse is output as shown in FIG. Next, a command "Read from data m" is transmitted.

When the control circuit 23 on the key side receives the stop pulse, it switches from the transmission state to the reception state as shown in FIG. Then, the power signal command content “Data
Read from m (Resend)]
Data m 1, data m + 1... Are transmitted to the control circuit 34 on the device side.

The control circuit 34 on the R / W device side outputs the data m
, Data m + 1..., As shown in (c), after synchronizing the frame, first, data m 1, CRCm, and EOM are detected in response to SOM detection. next,
As shown in (d), SOM, data m + 1, CRCm + 1
, EOM, while detecting an error in the data m. If there is no error in the data m, the data m is transmitted to the personal computer 30 while receiving the data m + 1, as shown in FIG.

The control circuit 34 on the R / W device side includes SOM,
After receiving data m + 1, CRCm + 1, and EOM,
As shown in (d), SOM, data m + 2, CRCm + 2
, EOM, while detecting an error in the data m + 1, and if there is no error in the data m + 1, the data m + 1 is transmitted to the personal computer 30 as shown in (e). At this time, when the end mark is detected from the data m + 1, the data m + 1 is transmitted to the personal computer 30 and the process is completed. In addition, the output of the power signal to the control circuit 23 on the key side is stopped, and the process ends.

FIG. 1 (a) shows the R / R from the personal computer 30.
(B) shows the content of a command from the R / W device 31 to the transponder 20, and (c) shows the content of a response from the transponder 20 to the R / W device 31. (D) and (e) show the operation of the R / W device 31,
(F) shows the operation of the transponder 20.

Next, the functions of the R / W device 31 will be described. <Operation data read / save function> After the power switch 32b of the R / W device 31 is turned on and the main body 19a of the normal key 19A is inserted into the key insertion slot 38a, the personal computer 30 is activated. 12, an operation data management key 44a, a key information setting key 44b, a user data management key 44c, and an end key 44d are displayed on the display device 30a (see FIG. 2). Here, when the operation data management key 44a is clicked, as shown in FIG.
a, the tabulation processing key 45b, and the end key 45c are displayed.

In this state, the data read key 45a
Is clicked, the personal computer 30 gives a command signal "Detect the presence or absence of a key" to the control circuit 34 on the R / W device side. Then, the control circuit 34 on the R / W device side
Determines the presence or absence of a key based on the output signal from the key detection switch 39, and transmits the determination result to the personal computer 30.

For example, when a determination result indicating that there is no key is given, the personal computer 30 displays a message on the display device 30a to prompt insertion of the normal key 19A. When a determination result indicating that a key is present is given, a command signal "Read ID code" is transmitted to the control circuit 34 on the R / W device side.

Upon receiving the command signal, the control circuit 34 on the R / W device side turns on and off the power amplifier 41, and sends the “ID” to the key-side control circuit 23 from the antenna coil 40a through the key-side antenna coil 21a. Send the code ''.

When the control circuit 23 on the key side receives the power signal, it starts up and determines the command content of the power signal. Then, when the command content “Send ID code” is determined, the ID
The code is read out, and the transistor 28a of the modulation circuit 28 is turned on / off based on the ID code.
The ID code is transmitted to the control circuit 34 on the device side.

When the control circuit 34 of the R / W device receives the ID code, it transmits it to the personal computer 30. Then, the personal computer 30 displays “A12” as shown in FIG.
Read the operation data of 345 (ID code). 』
Message 46a, an OK key 46b, a key change key 46c, and a cancel key 46d are displayed.

When the cancel key 46d is clicked, the personal computer 30 cancels the reading of the operation data and returns the screen to the previous state. When the key change key 46c is clicked, the control circuit 3 on the R / W device side operates.
4 is given a command signal "Read ID code", and by repeating the above-described series of operations, the ID code of the key 19A newly inserted into the key insertion port 38a is read, and this ID code is read. Confirmation message 46 based on
Rewrite a.

When the OK key 46b is clicked, the personal computer 30 gives a command signal "Read operation data" to the control circuit 34 on the R / W device side. Then, the control circuit 34 of the R / W device gives a power signal “send operation data” to the control circuit 23 of the key.

When the control circuit 23 on the key side receives the power signal, it starts up and determines the command content of the power signal. Then, the operation data is read from the operation data area of the nonvolatile memory 26, and the modulation circuit 28 is read out based on the operation data.
Is turned on / off, the R /
The operation data is transmitted to the control circuit 34 of the W device. Then, the control circuit 34 on the R / W device side receives the operation data and transfers it to the personal computer 30.

While communicating the operation data with the control circuit 34 on the R / W device side, the personal computer 30, as shown in FIG. 13 (b), displays a message 47a "Reading data ..." and a graph. 47b, Cancel key 47c
Is displayed, and the progress of the communication is notified as the length H of the graph 47b is changed. In FIG. 13A, when the cancel key 46d is clicked, the personal computer 30 stops reading the operation data,
The screen is returned to the state shown in FIG.

When the communication of the operation data is completed, the personal computer 30 displays the operation data 48a, the save key 48b, and the end key 48c as shown in FIG. 14, and when the end key 48c is clicked here, the processing is performed. finish. The operation data 48a includes date, time, work mode, abnormality record,
It consists of security, "12: July 1st:
The engine was started at 00 ”,“ 1 on July 1
2:06 to 12:24 indicates that the work of the mode 1 has been performed (work content per unit time).

In FIG. 14, when the save key 48b is clicked, the personal computer 30 saves the key data in a file as shown in FIG. Message 49a, an OK key 49b, a cancel key 49c, and a check boss 49d.

Here, check boss 49d, OK key 4
When 9b is clicked sequentially, the personal computer 30 writes the operation data 48a in the external storage medium 30c (floppy disk or hard disk) of FIG. 2 in association with the ID code. At the same time, the control circuit 3 on the R / W device side
4 is given a command signal "command clear of operation data". Then, the control circuit 34 on the R / W device side
Gives a command signal "clear operation data" to the key-side control circuit 23,
Clears (initializes) the operation data written in the operation data area of the nonvolatile memory 26.

In FIG. 15A, when the OK key 49b is directly clicked, the personal computer 30 does not clear the operation data in the non-volatile memory 26 on the key side, but stores the operation data 48a in the external storage medium 30c. Write. When the cancel key 49c is clicked, the personal computer 30
Returns the screen to its previous state.

When the personal computer 30 saves the operation data 48a in the external storage medium 30c, as shown in FIG. Is displayed, an OK key 50b, and a file name 50c are displayed. Here, if the OK key 50b is clicked, the processing is terminated. The file name 50c is created by the personal computer 30, where A is the Christian era (for example, 1996 is represented by A, 1997 is represented by B,..., 2021 is represented by Z),
2 is the month, and A12345 is the ID code of the key.

<Operation Data Aggregation Processing Function> In FIG. 12B, when the aggregation processing key 45b is clicked, the personal computer 30 causes the aggregation processing table 51a and the ID code input section 51b as shown in FIG. , Year input section 51c, month input section 51d, OK key 51e, and end key 51f. Here, when the end key 51f is clicked, the processing ends.

When the OK key 51e is clicked after the ID code, year, and month are input to the ID code input section 51b, the year input section 51c, and the month input section 51d, the personal computer 30 displays the input ID. The operation data corresponding to the code, year, and month is read from the external storage medium 30c. As the operation data is processed based on the totalization processing program, the operation data is totaled for each key (for each ID code), every month, and work content, and as shown in FIG. Write into a predetermined field of 51a. Note that this totaling process is performed by the personal computer 30 alone, and the R / W device 31 may not be connected.

<Key Information Reading Function> FIG.
When the key information setting key 44b is clicked, the personal computer 30 gives a command signal "Read key information" to the control circuit 34 on the R / W device side.
Then, the control circuit 34 of the R / W device transmits a command signal “send key information” to the control circuit 23 of the key.

When the key-side control circuit 23 receives the command signal, it starts up, reads out the key information from the system area of the nonvolatile memory 26, and transmits it to the personal computer 30 through the control circuit 34 on the R / W device side. Then, the personal computer 30
Is an ID code 5 as key information as shown in FIG.
2a, the next recording start page 52b, and the R / W update counter 52c are displayed. At the same time, check boss 52d1
52f2, last page input section 52g, key write key 52h, key information read key 52i, end key 5
2j is displayed.

The next recording start page indicates the page from which the operation data is read from the nonvolatile memory 26 on the key side. If the next recording start page is three pages, the control circuit on the R / W device side Reference numeral 34 reads and writes operation data with three pages as the start page. The last page input section 52g is for changing the boundary between the operation data area and the user data area. In the case of FIG. 8, the boundary is 13 pages. Also, R / W in FIG.
The update counter is incremented when the operation data is read from the key 19A and deleted, and indicates the history of initialization.

<Key Information Change Function 1> The check bosses 52d1 and 52d2 in FIG. 18 are for selecting whether or not to use a password when reading operation data from the operation data area of the nonvolatile memory 26. When the password is used, the check boss 52d1 is clicked, and as shown in FIG. 19, the operation data area password is switched as necessary, and then the write key 52h is clicked.

The check bosses 52e1 and 52e2 in FIG. 18 are used to select whether or not to use a password when reading user data from the user data area of the nonvolatile memory 26. Clicks on the check boss 52e1, switches the user data area password as necessary as shown in FIG. 19, and then clicks the write key 52h.

The check bosses 52f1 and 52f2 in FIG. 18 are for selecting whether or not the user data area is rewritable. When the user data area is not rewritable, the check bosses 52f1 and 52f2 are used. Is clicked, and as shown in FIG. 19, after the user data area write protection is switched as necessary, the write key 52h is clicked.

The personal computer 30 has a write key 52
When h is clicked, as shown in FIG.
"I need a system code. Enter the system code. Message 53a, OK key 53
b, cancel key 53c, system code input unit 53
Display d. Here, when the cancel key 53c is clicked, the screen is returned to the previous state.

After a system code (up to 6 alphanumeric characters) is input to the system code input section 53d,
When the OK key 53b is clicked, the personal computer 30
When a command is given to the control circuit 23 on the key side through the control circuit 34 on the R / W device side, a mode for reading operation data using a password, a mode for reading user data using a password, and a user data area. Switch to the mode that disables rewriting.

When the personal computer 30 switches the mode, as shown in (b) of FIG. 20, the message "The following writing has been completed. 54a, a mode switching content 54b of "area setting, operation data password setting, user data area password setting, write protection setting" and an OK key 54c are displayed. Here, when the OK key 54c is clicked, the processing is terminated.

<Key Information Change Function 2> In FIG. 18, when the number N (1 to 15) is input to the last page input section 52g and the write key 52h is clicked, the personal computer 30 As shown in FIG. 20A, a message 53a, an OK key 53b, a cancel key 53c, and a system code input section 53d are displayed.

Here, when the OK key 53b is clicked after the system code is input to the system code input section 53d, the personal computer 30 is transmitted to the key-side control circuit 23 through the R / W device-side control circuit 34. When the command is given, the input value N is changed to the last page of the operation data area, N
+1 is set as the start page of the user data area, and FIG.
As shown in FIG. 0B, a message 54a, mode switching contents 54b, and an OK key 54c are displayed.

<Key Information Change Function 3> In FIG. 21, when the password change key 55a is clicked,
As shown in FIG. 20A, the personal computer 30 sends a message 53a, an OK key 53b, a cancel key 53c,
The system code input section 53d is displayed. Here, when the OK key 53b is clicked after the system code is input to the system code input section 53d, a password input section 56a is displayed as shown in FIG.
The current password (PASS) is displayed in a.

In this state, after the change password is input to the password input section 56a, the write key 5
When 2h is clicked, the personal computer 30 displays a message 53a and an OK key 53, as shown in FIG.
b, cancel key 53c, system code input unit 53
Display d. Here, when the OK key 53b is clicked after the system code is input to the system code input section 53d, a command is given to the key-side control circuit 23 through the R / W device-side control circuit 34, change the password. Then, as shown in FIG. 20B, a message 54a, mode switching contents 54b, OK
The key 54c is displayed.

<Key Information Change Function 4> FIG.
When the user data management key 44c is clicked, the personal computer 30 reads the ID code from the normal key 19A, and as shown in FIG. 13A, confirms the confirmation message 46a (in this case, "user data of A12345" Is read out.], O
K key 46b, key change key 46c, cancel key 4
6d is displayed. Here, when the OK key 46b is clicked, the user data is read from the user data area of the nonvolatile memory 26 of the key-side control circuit 23 through the control circuit 34 of the R / W device, and is displayed on the screen.

When the mode is switched to a mode for reading user data using a password, the personal computer 30
Display the password input screen. When it is detected that the password has been correctly input, the user data is read from the nonvolatile memory 26 and displayed on the screen.

Here, the ID code, engine number,
When user data (corresponding to user information) such as optional installation data, dealer maintenance data, refueling history, and diagnosis data at the time of use is input, the personal computer 30 returns to FIG.
As shown in the figure, a message 53a, an OK key 53b, a cancel key 53c, and a system code input section 53d are displayed.

When the mode is switched to the mode in which the user data area is not rewritten, the personal computer 30 displays a message on the screen to notify that the user data cannot be written.

In FIG. 20A, after the system code is input to the system code input section 53d and the OK key 53b is clicked, the personal computer 30 sets the R / W
After writing the user data in the user data area of the non-volatile memory 26 or rewriting the user data through the control circuit 34 on the device side, as shown in FIG.
b, OK key 54c is displayed.

According to the above embodiment, the transponder 20
The communication error from the R / W device 31 to the R / W device 31 is determined by the R / W device 31. If no communication error is detected, the data from the transponder 20 is transmitted to the personal computer 30,
If a communication error is detected, the transponder 20
To resend the data. For this reason, the R / W device 31
Since unnecessary data (data with a communication error) is not transmitted to the personal computer 30, communication time is shortened.

It is also determined that the data from the transponder 20 is the final operation data and user data.
When the / W device 31 determines and the last operation data and user data are detected, the transmission of the subsequent data to the personal computer 30 is stopped. For this reason, the R / W device 31
Since unnecessary data (initialization data and the like) is not transmitted to the personal computer 30 from this point, the communication time is shortened from this point as well.

If there is no communication error in the data from the transponder 20, the operation of receiving the data from the transponder 20 and the operation of transmitting the data previously received from the transponder 20 to the personal computer 30 are performed by the R / W device 3.
1 went in parallel. For this reason, the communication time is further reduced as compared with the case where the data is transmitted from the transponder 20 to the personal computer 30 after detecting the error and transmitting the data collectively to the personal computer 30.

If there is a communication error in the data from the transponder 20, the R / W device 31 instructs the transponder 20 to "retransmit from the erroneous data". For this reason, the transmission is restarted serially from the data in which the communication error has occurred, so that the communication time is further reduced as compared with the case where the transmission is restarted from the initial data.

The transponder 20 and the R / W device 3
At the time of communication with No. 1, data communication was performed by supplying operating power from the R / W device 31 to the transponder 20 in a non-contact manner. For this reason, it is not necessary to incorporate a power source such as a battery in the transponder 20, so that the transponder 20 is prevented from being large-sized and troublesome to replace the battery.

Further, operation data was communicated between the vehicle controller 12 and the R / W device 31 using the key 19A as a medium. For this reason, unlike the conventional case where the operation data is communicated using the IC card as a medium, the key 19A
This eliminates the need to carry both the IC card and the IC card, thereby improving usability. In particular, in the case of a special vehicle such as the construction vehicle 11, the inconvenience of carrying both the key 19A and the IC card at the work site is eliminated, which is more advantageous in terms of usability.

Further, the operation data was communicated using the existing hardware configuration for security (immobilizer, door security). This prevents the engine from being started by an unregistered key and prevents the operation data from being copied, which is advantageous in terms of data security.

Also, the personal computer 30 and the R / W device 31
, User data is written to the nonvolatile memory 26 on the key side, and user data is read from the nonvolatile memory 26. For this reason, it is not necessary to write the user data in an IC card or a notebook and carry it with the user, so that usability is further improved.

In the above embodiment, the R / W device 3
1 is driven by an external power supply (commercial AC power supply), but the invention is not limited to this. For example, an internal power supply such as a battery may be incorporated in the R / W device 31 and driven by the internal power supply.

In the above embodiment, the desktop type personal computer 30 is exemplified as the external control device.
The present invention is not limited to this, and may be, for example, a portable notebook personal computer, a sub notebook personal computer, or the like.

In the above embodiment, the personal computer 3
Although the user data is written into the transponder 20 through the R / W device 31 and the R / W device 31, the present invention is not limited to this. For example, the user data writing function may be omitted. In the case of this configuration, the R / W device 31 functions as a dedicated reader for reading operation data from the transponder 20.

In the above embodiment, the key detection switch 39 is provided in the R / W device 31, and the key insertion section 38a
Although it is configured to detect whether the keys 19A and 19B are inserted into the key, the invention is not limited to this. For example, the key detection switch 39 may be omitted. in this case,
Since the R / W device 31 cannot communicate with the transponder 20 even if it tries to communicate with the transponder 20, at this point, the absence of the key is detected,
It can be displayed on the screen of the personal computer 30.

In the above embodiment, the transponder 20 is incorporated in the keys 19A and 19B. However, the present invention is not limited to this. For example, the transponder 20 may be incorporated in a card. Is also good). In the above embodiment, the error of the (N-1) th data is detected while receiving the Nth data from the transponder 20, but the present invention is not limited to this. May be detected, or the error of the (N-3) th data may be detected. In short, the error of the previously received data may be detected.

In the above embodiment, the (N-1) th data is transmitted to the personal computer 30 while the Nth data is received from the transponder 20, but the present invention is not limited to this. While receiving the data, the (N-2) th data may be transmitted. In short, the previously received data may be transmitted.

In the above embodiment, the operation of receiving data from the transponder 20 and the operation of the transponder 2
Although the operation of transmitting data received earlier from 0 to the personal computer 30 was performed in parallel, the present invention is not limited to this. For example, after receiving all data from the transponder 20 and detecting an error, Data of personal computer 3
0 may be transmitted collectively.

In the above embodiment, the present invention is applied to the construction vehicle 11, but is not limited to this, and may be applied to, for example, an automobile. In this case, the password is input by inserting the normal key 19A or the master key 19B into the ignition key cylinder, and performing the following operations (1) and (2) as one set and performing four sets. In detecting an ID code from the keys 19A and 19B, the ID code may be detected by a signal that the starter switch 11a has been turned to ACC, and it may be determined whether the ID code is registered. . (1) Turn the key 19A or 19B to “(ACC) → ON”
→ Turn to ACC only N times. (2) Press the key 19A or 19B from “(ACC) → OF”.
Turn once only to “F → ACC”.

[0132]

As is clear from the above description, the data carrier system of the present invention has the following effects. According to the first aspect, a communication error from the data carrier device to the reader device is determined by the reader device, and if there is no error, the data from the data carrier device is transmitted to the external control device. In some cases, the data carrier device was instructed to retransmit data. For this reason, useless data (data with a communication error) is not transmitted from the reader device to the external control device, and the communication time is shortened.

According to the means of claim 2, when there is no error in the data from the data carrier device, the operation of receiving the data from the data carrier device, and transmitting the previously received data to the external control device. The operation was performed by the reader device in parallel. Therefore, the communication time is further reduced.
According to the third aspect of the present invention, when there is an error in the data from the data carrier device, the reader device instructs the data carrier device to "retransmit from the erroneous data". Therefore, the communication time is further reduced.

According to the fourth aspect of the present invention, the reader device determines that the data from the data carrier device is the last vehicle data, and when the last vehicle data is detected, the data is transmitted to the external control device. Transmission of data has stopped. For this reason, useless data (initialization data and the like) is not transmitted from the reader device to the external control device, and the communication time is shortened.

According to the fifth aspect, at the time of communication between the data carrier device and the reader device, operating power is supplied from the reader device to the data carrier device in a non-contact manner. This eliminates the need to incorporate a power source such as a battery in the data carrier device, thereby preventing the data carrier device from being enlarged. At the same time, the trouble of replacing the battery is eliminated.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention (PC, R / W
Diagram showing data communication status between device and transponder)

FIG. 2 is a diagram schematically showing an entire configuration.

FIG. 3 is a diagram showing an electrical configuration of the R / W device.

FIG. 4 is a side view showing the R / W device with a part cut away.

FIG. 5 is a top view showing the R / W device.

FIG. 6 is a side view showing the R / W device.

FIG. 7 is a diagram showing an electrical configuration of a transponder.

FIG. 8 is a diagram showing a data layout of a nonvolatile memory;

FIG. 9 is a diagram showing an electrical configuration of a vehicle-side controller.

FIG. 10 is a diagram showing an appearance of a vehicle-side controller.

FIG. 11 is a diagram showing communication waveforms of a vehicle controller, a key, and a R / W device.

FIG. 12 is a diagram showing a screen of a personal computer.

FIG. 13 is a diagram showing a screen of a personal computer.

FIG. 14 is a diagram showing a screen of a personal computer.

FIG. 15 is a diagram showing a screen of a personal computer.

FIG. 16 is a diagram showing a screen of a personal computer.

FIG. 17 shows a screen of a personal computer.

FIG. 18 is a diagram showing a screen of a personal computer.

FIG. 19 is a diagram showing a screen of a personal computer.

FIG. 20 is a diagram showing a screen of a personal computer.

FIG. 21 shows a screen of a personal computer.

FIG. 22 is a diagram showing a screen of a personal computer.

FIG. 23 shows a conventional example.

[Explanation of symbols]

20 is a transponder (data carrier device), 21a
Is an antenna coil, 30 is a personal computer (external control device), 31 is a R / W device (reader device), 34
Denotes a control circuit (error detection unit, data judgment unit), and 40a denotes an antenna coil.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Sadao Kokubu 1 Noda, Toyota, Oguchi-machi, Oguchi-machi, Niwa-gun, Aichi Prefecture Tokai Rika Electric Works, Ltd.

Claims (5)

[Claims] 1. A data carrier device for storing vehicle data, and a reader device for reading data from the data carrier device and transmitting the data to an external control device in response to a command signal from an external control device, The reader device includes an error detection unit that detects a communication error from the data carrier device to the reader device. When a communication error is not detected, the reader device transmits data from the data carrier device to the external control device. The data carrier system instructs the data carrier device to retransmit data when is detected. 2. The reader device, when a communication error is not detected, performs an operation of receiving data from the data carrier device and an operation of transmitting data previously received from the data carrier device to an external control device in parallel. The data carrier system according to claim 1, wherein: 3. The data carrier system according to claim 1, wherein when the communication error is detected, the reader device instructs the data carrier device to retransmit from the data in which the communication error is detected. 4. A data carrier device for storing vehicle data, and a reader device for reading data from the data carrier device and transmitting the data to the external control device in response to a command signal from an external control device, The reader device has a data determination unit that determines that the data from the data carrier device is final vehicle data, and when the final vehicle data is detected, transmission of subsequent data to the external control device A data carrier system characterized by stopping. 5. The data carrier device and the reader device have an antenna coil, communication between the data carrier device and the reader device is performed in a non-contact manner through the antenna coil, and at the time of communication between the data carrier device and the reader device,
5. The data carrier system according to claim 1, wherein operating power is supplied from the antenna coil of the reader device to the data carrier device through the antenna coil of the data carrier device in a non-contact manner.