JP2003011746A - Erroneous assembly detecting device of on-vehicle electronic component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily detect erroneous assembly of a plurality of electronic components, which are used as a set, without inputting a specific ID code. SOLUTION: An MPU 13 of a slave unit 5 and an MPU 23 of a master unit 7 respectively calculate a power supply time from when an ignition switch 3 turns on to when the ignition switch 3 turns off and store in EEPROMs 15, 25. The slave unit 5 transmits the power supply time stored in the EEPROM 15 to the master unit 7 by a communication circuit 17, and the master unit 7 receives through a communication circuit 27. The MPU 23 of the master unit 7 compares the power supply time received from the slave unit 5 and the power supply time of the master unit 7 stored in the EEPROM 25. When there is a great difference, it is determined that either of the slave unit 5 or the master unit 7 is assembled erroneously and an alarm is outputted from an alarm device 33.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an erroneous assembly detection device for a plurality of vehicle-mounted electronic components which are used in combination with each other.

[0002]

2. Description of the Related Art When a master unit and at least one slave unit, which are electronic components configured to communicate with each other, are mounted on a vehicle, for example, for repairing the vehicle at a vehicle dealership or a service factory, the slave unit is used. If the vehicle is once removed from the vehicle and then reattached, there are various similar parts in the vehicle dealership and service factory, so there is a possibility that other parts may be accidentally installed in place of the removed child device. is there.

A technique for dealing with such an erroneous assembly of parts is described in, for example, Japanese Patent Laid-Open No. 11-115647. For this, a unique ID code is registered in advance in all the slaves, while an ID code of each slave corresponding to this master is also registered in the master. Then, when the system is turned on, the master unit reads the ID code registered in each slave unit and compares it with the ID code of each slave unit registered in the master unit. Assembly is detected.

[0004]

However, in the above-described conventional device, since it is necessary to register the unique ID codes in both the master unit and the slave unit, the master unit and the slave unit are An input circuit for registering the ID code from the outside is required, and external equipment for registering the ID code is also required, resulting in an increase in the cost of the entire system.

Therefore, an object of the present invention is to make it possible to easily detect an erroneous assembly of electronic parts without the need to input a unique ID code.

[0006]

In order to achieve the above object, the invention according to claim 1 provides a first electronic component and a second electronic component which are respectively supplied with power by turning on an ignition switch. Configured to be able to communicate between
In the first electronic component, a first power supply time calculating means for calculating a time until the ignition switch is turned on and then turned off as a first power supply time, and the first power supply time. First time storage means for storing the first power supply time calculated by the calculation means, and the first power supply time stored in the first time storage means are transmitted to the second electronic component. Second power supply time calculating means for calculating, as the second power supply time, a time until the ignition switch is turned on and then turned off, in the second electronic component. And a second memory for storing the second power supply time calculated by the second power supply time calculating means.
Time storing means, receiving means for receiving the first power supply time transmitted from the transmitting means of the first electronic component, the first power supply time and the second power receiving time received by the receiving means. Of the second power supply time stored in the time storage means, and a comparison judgment means for judging whether the difference is within a predetermined value or not, and the judgment result by the comparison judgment means is larger than the predetermined value. In this case, it is configured to have a notifying means for notifying that an erroneous assembly of electronic components has occurred.

According to a second aspect of the present invention, in the configuration of the first aspect of the invention, the first time storage means and the second time storage means have a first power supply time and a first power supply time each time the ignition switch is turned on. Each cumulative time of the two power supply times is stored.

According to a third aspect of the present invention, by turning on an ignition switch, the first electronic component and the second electronic component, to which power is respectively supplied, are communicable with each other, and the first electronic component is provided. Is a first number-of-times storage means for storing the number of times the ignition switch is turned on as a first number of times of ignition, and a first number of times of ignition stored in the first number-of-times storage means for the second number of times. The second electronic component stores the number of times the ignition switch has been turned on as a second number of times the ignition is turned on, and the second number storage means, Receiving means for receiving the first ignition-on count transmitted from the transmitting means of the first electronic component, and before receiving by the receiving means. Comparison judgment means for comparing the first ignition number of times and the second ignition number of times stored in the second number of times storing means, and judging whether or not they are the same value, and the judgment result by this comparison judging means. If the two are not the same, a notification means is provided to notify that an erroneous assembly of electronic components has occurred.

According to a fourth aspect of the present invention, in the configuration according to any one of the first to third aspects, the transmitting means provided in the first electronic component supplies the first power source after the ignition switch is turned on. The time or the first number of times the ignition is turned on is transmitted to the receiving means of the second electronic component a predetermined number of times.

[0010]

According to the first aspect of the present invention, the power supply time to the electronic parts after the ignition switch is turned on is peculiar to the vehicle. Therefore, even if erroneous assembly occurs, it is erroneous. Since the power supply time of the assembled electronic parts is different from other electronic parts of the vehicle, it is easy to erroneously assemble the electronic parts without inputting a unique ID code by comparing the power supply times. Can be detected. Since there is no need to input a unique ID code, it is not necessary to provide an electronic component with an input circuit for inputting an ID code from the outside, and external equipment for registering the ID code is also unnecessary, increasing the overall system cost. Can be prevented.

According to the second aspect of the invention, since the accumulated time of the power supply time each time the ignition switch is turned on is used, the reliability is further improved as the unique information peculiar to the vehicle.

According to the third aspect of the present invention, the number of times the ignition switch is turned on is peculiar to the vehicle. Therefore, even if erroneous assembly occurs, the ignition switch of the erroneously installed electronic component is used. The number of turns on is different from other electronic parts of the vehicle. Therefore, by comparing the number of times the ignition switch is turned on, the unique ID
Erroneous assembly of electronic components can be easily detected without entering a code. Since there is no need to input a unique ID code, it is not necessary to provide an electronic component with an input circuit for inputting an ID code from the outside, and external equipment for registering the ID code is also unnecessary, increasing the overall system cost. Can be prevented.

According to the invention of claim 4, the first electronic component transmits the first power supply time or the first number of times of ignition to the second electronic component a predetermined number of times. Can be reliably detected.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the overall configuration of a vehicle-mounted electronic component misassembly detection apparatus according to the first embodiment of the present invention. Power supply 1 is ignition switch 3
When the power is turned on, the child device 5 as the first electronic component
And electric power is supplied to the base unit 7 as the second electronic component. The slave unit 5 and the master unit 7 are used as a pair with each other and store tuning data set for each vehicle product.

The slave unit 5 includes a power supply circuit 9 and a power supply monitor circuit 1.
1, MPU 13, EEPROM 15, and communication circuit 17
It has each. On the other hand, the main unit 7 has a power supply circuit 19,
Power supply monitor circuit 21, MPU 23, EEPROM 25,
A communication circuit 27 and an alarm device control circuit 29 are provided respectively.

The power supply circuit 9 in the slave unit 5 supplies 5V from the power supplied from the power source 1 to each unit in the slave unit 5.
To generate power. The power supply circuit 9 also has an EEPR when the ignition switch 3 is turned off.
A backup power supply for a short time required for recording on the OM 15 is provided.

The MPU 13 converts the electric power from the power source 1 into digital information by the built-in A / D converter via the power source monitor circuit 11, detects the on / off state of the ignition switch 3, and is turned on. The first power supply time from when the switch is turned off to when the switch is turned off is calculated. Therefore MPU
Reference numeral 13 includes a first power supply time calculation means. The EEPROM 15, which is a non-volatile memory, constitutes a first time storage unit that stores the first power supply time calculated by the MPU 13. The communication circuit 17 uses the communication line 3
The transmission means for transmitting the information of the child device 5, that is, the above-described first power supply time, to the communication circuit 27 of the parent device 7 via 1 is configured.

The power supply circuit 19 in the base unit 7 supplies the electric power supplied from the power source 1 to each unit in the base unit 5
Generate electric power such as V. In addition, the power supply circuit 19
EE when the ignition switch 3 is turned off
A backup power supply for a short time required for recording in the PROM 25 is provided.

Further, the MPU 23 converts the power from the power source 1 into digital information by an A / D converter incorporated through the power source monitor circuit 21, detects the on / off state of the ignition switch 3, and turns it on. A second power supply time from when the power is turned off to when the power is turned off is calculated. Therefore, the MPU 23 includes a second power supply time calculation means.

EEPROM 25 which is a non-volatile memory
Constitutes a second time storage means for storing the second power supply time calculated by the MPU 23. Communication circuit 27
Constitutes a receiving means for receiving the information from the communication circuit 17 of the handset 5 via the communication line 31, that is, the first power supply time.

Further, the MPU 23 of the base unit 7 described above receives the first power supply time of the handset unit 5 received by the communication circuit 27,
It includes a comparison / determination unit that compares and determines the second power supply time stored in the EEPROM 25.

The alarm device control circuit 29 uses the above MPU.
Based on the result of the comparison and determination by 23, when an erroneous assembly of electronic parts occurs, an alarm device 33 as an informing unit for informing the user such as a driver of the abnormality is drive-controlled.

FIG. 2 shows a measurement period when power is supplied to the slave unit 5 and the master unit 7 while the ignition switch 3 is turned on.

Next, the operation of this system will be described with reference to FIGS. 3 and 4. First, the control operation of the MPU 13 in the handset 5 will be described based on the flowchart of FIG. First, it is determined whether or not the ignition voltage VIGN A / D converted by the MPU 13 is equal to or higher than a predetermined voltage (for example, 9V) (step 201).

If VIGN ≧ 9V, the ignition switch 3 is in the ON state, and it is determined whether or not the elapsed time from when the ignition switch 3 is turned ON is being measured (step 203). Here, when the elapsed time is being measured, the process returns to step 201, and it is monitored that the ignition switch 3 is turned off. On the other hand, if the elapsed time has not been measured, the ignition switch 3 is turned on to start measuring the time (step 205), and the time from when the ignition switch 3 was turned on to when it was turned off last time is measured. EEPROM15
Is the first power supply time stored in Time_
S is loaded (step 207). Then, the loaded measurement time Time_S is transmitted to the communication circuit 27 of the master device 7 through the communication circuit 17 as the predetermined number of times, for example, 50 times (step 209).

The above-mentioned processing of step 203 is provided in order to carry out the processing of steps 205 to 209 only once immediately after the ignition switch 3 is turned on.

When VIGN <9V in step 201, it is in a state where the ignition switch 3 is turned off, and it is determined whether or not the elapsed time from when the ignition switch 3 is turned on is being measured (step 21).
1) If the elapsed time is being measured, stop measuring the ON time of the ignition switch 3 (step 21
3), EEPROM with this measurement time as Time_S
15 (step 215). Meanwhile, step 21
If the elapsed time is not measured at 1, the MPU 13 is only operating at a low voltage of less than 9V, so the process returns to step 201 to monitor whether the ignition switch 3 is turned on.

Next, based on the flowchart of FIG.
The control operation of the MPU 23 in the parent device 7 will be described. MP
Ignition voltage VIG A / D converted by U23
It is determined whether N is equal to or higher than a predetermined voltage (for example, 9V) (step 401).

When VIGN ≧ 9V, it is determined whether or not the elapsed time from when the ignition switch 3 is turned on is being measured (step 403). Here, if the elapsed time is being measured, the process returns to step 401 and it is monitored that the ignition switch 3 is turned off. On the other hand, when the elapsed time is not measured, the time measurement from the ignition switch 3 being turned on is started (step 405), and the time from the ignition switch 3 being last turned on to being turned off is measured. EEPROM 25
Is the second power supply time stored in Time_
M is loaded (step 407).

Then, it is judged whether or not the Time_S transmitted from the communication circuit 17 on the handset 5 side is received via the receiving circuit 27 (step 409). 9 ≦ Time_S / Time_M ≦
1.1, that is, Time_S and Tim
It is judged whether or not the difference between e_M is within ± 10% (step 411). If this difference exceeds ± 10%, it is not the part where the slave unit 5 and the master unit 7 are used as a set, but one of the slave unit 5 and the master unit 7 is a vehicle. Assuming that the assembly is wrong, the alarm device 33 is operated through the alarm device control circuit 29 to output an alarm (step 413).

The power supply time to the electronic parts after the ignition switch 3 is turned on is peculiar to the vehicle. Therefore, the power supply time between the slave unit 5 and the master unit 7 should be compared. Therefore, misassembly can be easily detected. In addition, Time_S from the handset 5 to the base unit 7
Is transmitted a predetermined number of times, 50 times, so that the master device 7 can reliably receive Time_S, and the misassembly can be reliably detected.

By outputting the erroneous assembly alarm, a user such as a driver recognizes that one of the slave unit 5 and the master unit 7 is erroneously assembled due to being mistaken for other parts. can do. The detection of this misassembly does not require the registration of the unique ID code in each of the slave unit 5 and the master unit 7, so that the slave unit 5 and the master unit 7 are
An input circuit for registering an ID code from the outside is unnecessary, and external equipment for registering this ID code is also unnecessary, so that it is possible to prevent an increase in cost of the entire system.

The processing of step 403 described above is provided to execute the processing of steps 405 to 413 only once immediately after the ignition switch 3 is turned on.

If VIGN <9V in step 401, it means that the ignition switch 3 is in the off state, and it is determined whether or not the time elapsed since the ignition switch 3 was turned on is being measured (step 41).
5) If the elapsed time is being measured, stop measuring the ON time of the ignition switch 3 (step 41).
7) Then, it is judged whether or not the alarm device 33 is activated (step 419).

If the alarm device is activated at this point, the processing of the present system is terminated, and if not activated, the ON time of the ignition switch 3 is recorded in the EEPROM 25 as Time_M (step 421).

If the elapsed time is not measured in step 415, the MPU 23 is only operating at a low voltage of less than 9V, so the process returns to step 401 and it is monitored that the ignition switch 3 is turned on.

In the first embodiment, after the ignition switch 3 is turned on, the first and second power supply times of the slave unit 5 and the master unit 7 measured last time are compared with each other. However, instead of this, the cumulative values of the first power supply time and the second power supply time measured each time the ignition switch 3 is turned on may be compared. As a result, the reliability is further improved as the unique information peculiar to the vehicle.

Next, a second embodiment of the present invention will be described with reference to FIG.
And it demonstrates based on FIG. The overall configuration of the misassembly / installation device of the second embodiment is similar to that of FIG. However, the MPUs 13 and 23 here calculate the number of times that the ignition switch 3 is turned on, and the calculated number of times the ignition is turned on is stored in the EEPROM 1.
I am trying to memorize in 5 and 25 respectively. Therefore, the EEPROMs 15 and 25 are the first number storage means for storing the number of times the ignition switch 3 is turned on,
Each of the second number storage means is configured. In addition, the MPU 23 in the master unit 7 is the first unit transmitted from the slave unit 5.
It includes a comparison and determination means for making a comparison and determination between the number of times the ignition is turned on and the number of times the second ignition is stored in the EEPROM 25.

First, based on the flowchart of FIG.
The control operation of the MPU 13 in the handset 5 will be described. MP
Ignition voltage VIG A / D converted by U13
It is determined whether N is equal to or higher than a predetermined voltage (for example, 9V) (step 501). Here, when VIGN ≧ 9V, it is determined whether or not the number of times the ignition switch 3 is turned on, that is, the first number of times the ignition is turned on, counted by the MPU 13 has been transmitted to the main device 7 side via the communication circuit 17. (Step 503). If it is transmitting, the process returns to step 501, and it is monitored that the ignition switch 3 is turned off.

On the other hand, if not transmitted, EEPR
The first ignition-on count Count_S stored in the OM 15 is loaded (step 505), and the loaded count_S is counted and added (step 50).
7). The Count_S updated by this addition
Is transmitted to the communication circuit 27 of the parent device 7 through the communication circuit 17 as a predetermined number of times, for example, 50 times (step 50).
9).

The process of step 503 described above is provided to execute the processes of steps 505 to 509 only once immediately after the ignition switch 3 is turned on.

When VIGN <9V in step 501, the ignition switch 3 is in the off state, and the number of times the ignition switch 3 is turned on, that is, the Count_S updated by the addition is EEP.
The data is recorded in the ROM 15 (step 511), and the process ends.

Next, the control operation of the MPU 23 in the base unit 7 will be described with reference to the flowchart of FIG. MPU
Ignition voltage VIGN A / D converted at 23
It is determined whether or not is equal to or higher than a predetermined voltage (for example, 9V) (step 601). Here, when VIGN ≧ 9V, the first ignition-on count Count_S counted by the MPU 13 of the slave unit 5 is set to the communication circuit 27.
Determines whether the message has already been received (step 60)
3). When it is received, the process returns to step 601 and it is monitored that the ignition switch 3 is turned off.

On the other hand, if not received, EEPR
The second ignition-on count Count_M stored in the OM 25 is loaded (step 605), and the loaded count_M is counted and added to the current ON state of the ignition switch 3 (step 60).
7).

Subsequently, the communication line 31 is monitored, and the process waits until the Count_S transmitted from the handset 5 is received (step 609). Here, in order to detect a communication error or the like, the monitoring process is continued for a predetermined time,
If the Count_S cannot be received within the predetermined time, it may be determined to be abnormal.

When Count_S is received, the count number of times the ignition switch 3 of the handset 5 is turned on Count_S,
Number of times the ignition switch 3 of the base unit 7 is turned on Coun
It is compared with t_M and it is judged whether or not they have the same value (step 611). Here, in the case of different values, it is not a part where the slave unit 5 and the master unit 7 are used as a set here, but one of the slave unit 5 and the master unit 7 is erroneously assembled to the vehicle. Then, the alarm device 33 is operated via the alarm device control circuit 29 to output an alarm (step 61).
3).

The number of times the ignition switch 3 is turned on is peculiar to the vehicle. Therefore, the number of times the ignition switch 3 is turned on is set to the slave unit 5 and the master unit 7.
By comparing between and, it is possible to easily detect erroneous assembly.

Count_S of the child device 5 and Cou of the parent device 7
If nt_M has the same value, it is assumed that the slave unit 5 and the master unit here are used as a set, and that no wrong assembly has occurred, and the process returns to step 601 and the same applies thereafter. Perform processing.

The process of step 603 described above is provided in order to perform the processes of steps 605 to 613 only once immediately after the ignition switch 3 is turned on.

When VIGN <9V in step 601, it is determined whether the ignition switch 3 is off and the alarm device 33 is activated (step 615). Terminates system processing. On the other hand, when the alarm device 33 is not operating, the number of times the ignition switch 3 has been turned on Cou
nt_M is recorded in the EEPROM 25 (step 61
7), the process ends.

In each of the above-mentioned embodiments, the slave unit 5
Although the communication method between the device and the base unit 7 is unidirectional communication, bidirectional communication may be used.

Further, for example, when only the slave unit 5 is replaced with a new part due to the malfunction of the slave unit 5, a special power supply pattern, for example, by turning on / off the ignition switch 5 times in 10 seconds, the EEPROM 1
When the stored information in 5, 5 is reset, or when it has a communication means with an external device, the EEPROM 1 is sent by transmitting a reset command from this external device.
It is only necessary to reset the stored information in 5, 25.

[Brief description of drawings]

FIG. 1 is a block diagram showing an overall configuration of an on-vehicle electronic component misassembly detection device according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a measurement period when power is supplied to the child device and the parent device while the ignition switch according to the first embodiment is turned on.

FIG. 3 is a flowchart showing the control operation of the MPU of the child device in the first embodiment.

FIG. 4 is a flowchart showing a control operation of the MPU of the master unit in the first embodiment.

FIG. 5 is a flowchart showing a control operation of an MPU of a child device in the second embodiment.

FIG. 6 is a flowchart showing a control operation of an MPU of a parent device in the second embodiment.

[Explanation of symbols]

3 Ignition switch 5 Slave unit (first electronic component) 7 Master unit (second electronic component) 13 MPU (first power supply time calculation means) 15 EEPROM (first time storage means, first number of times storage) 17) Communication circuit (transmission means) 23 MPU (second power supply time calculation means, comparison determination means) 25 EEPROM (second time storage means, second number storage means) 27 Communication circuit (reception means) 33 Alarm device (informing means)

Claims (4)

[Claims] 1. A first electronic component and a second electronic component, to which power is respectively supplied, are configured to be communicable by turning on an ignition switch, and the first electronic component is connected to the first electronic component.
The electronic component of the first power supply time calculation means for calculating the time until the ignition switch is turned on and then turned off as the first power supply time, and the first power supply time calculation means. The first calculated
And a transmitting means for transmitting the first power supply time stored in the first time storage means to the second electronic component. In the second electronic component, a second power supply time calculating means for calculating a time until the ignition switch is turned on and then turned off as a second power supply time, and the second power supply time. Second time storage means for storing the second power supply time calculated by the calculation means, and reception means for receiving the first power supply time transmitted from the transmission means of the first electronic component , Comparing the first power supply time received by the receiving means with the second power supply time stored in the second time storage means, and judging whether the difference is within a predetermined value or not. Judgment means, The in-vehicle electronic component misassembly detection device, comprising: an informing unit for informing that the misassembly of the electronic component has occurred, when the result of the determination by the comparison and determination means is larger than the predetermined value. . 2. The first time storage means and the second time storage means respectively store respective cumulative times of the first power supply time and the second power supply time each time the ignition switch is turned on. The erroneous assembly detection device for an on-vehicle electronic component according to claim 1, wherein: 3. A first electronic component and a second electronic component, to which power is respectively supplied, are communicable with each other by turning on an ignition switch, and the first electronic component is connected to the first electronic component.
The electronic component of (1) stores the number of times the ignition switch is turned on as a first number of times of ignition, and a first number of times of storing means, and a first number of times of ignition stored in the first number of times of storing means. Transmission means for transmitting to the second electronic component, respectively.
The second electronic component has a second number storage means for storing the number of times the ignition switch is turned on as a second number of times the ignition is turned on, and the first ignition signal transmitted from the transmitting means of the first electronic component. The receiving means for receiving the number of times of ON and the first number of times of ignition received by the receiving means and the second number of times of ignition stored in the second number of times storing means are compared, and the same value is obtained. A vehicle-mounted electronic component characterized by having a comparison determination unit for determining whether or not the determination result by this comparison determination unit is not the same Misassembly detection device. 4. The transmitting means provided in the first electronic component indicates a first power supply time or a first number of times the ignition is turned on after the ignition switch is turned on.
The erroneous assembly detecting device for an on-vehicle electronic component according to any one of claims 1 to 3, wherein the erroneous assembly detecting device transmits the predetermined number of times to the receiving means of the second electronic component.