Installed in vehicle for monitoring target section in the vehicle

• US 8,954,219 B2
• Filed: 12/13/2010
• Issued: 02/10/2015
• Est. Priority Date: 12/14/2009
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Kobayashi, Masayuki
• Primary Examiner(s): Chen, Shelley
• Application Number:
  US12/928,530
• Publication Number:
  US 20110144852A1
• Time in Patent Office: 1,520 Days
• Field of Search: 701/29
• US Class Current: 701/29.2
• CPC Class Codes: G07C 5/0808 Diagnosing performance data testing of vehicles G01M17/00; testing of electrical installation on vehicles G01R31/005

Abstract

In a device installed in a vehicle for monitoring a target section in the vehicle, an executing unit executes a specific process for addressing an abnormality in the target section, and an instructing unit instructs the executing unit to execute the specific process when an abnormality occurs in the target section. A determining unit determines when the specific process is required to be checked. A checking unit instructs the executing unit to execute the specific process independently of whether an abnormality occurs in the target section each time it is determined that the specific process is required to be checked, thus checking whether an abnormality occurs in the specific process.

Claims

1. A device installed in a vehicle for monitoring a target section in the vehicle, the device comprising:

an executing unit configured to execute a fail-safe process for addressing an abnormality in the target section;

an instructing unit configured to instruct the executing unit to execute the fail-safe process when an abnormality occurs in the target section;

a determining unit configured to determine when the fail-safe process is required to be checked;

a checking unit configured to instruct the executing unit to execute the fail-safe process independently of whether an abnormality occurs in the target section each time it is determined that the fail-safe process is required to be checked, thus checking whether an abnormality occurs in the fail-safe process;

an obtaining unit configured to obtain, as information indicative of an amount of operation of the device, information indicative of a plurality of types of parameters indicative of the amount of operation of the device,

the determining unit being configured to determine that the fail-safe process is required to be checked each time all of the plurality of types of parameters indicative of the amount of operation of the device respectively meet a plurality of preset conditions, the plurality of preset conditions being previously set respectively for the plurality of types of parameters indicative of the amount of operation of the device; and

a correcting unit configured to correct each of the plurality of preset conditions based on a difference between a first timing at which the fail-safe process is required to be checked upon all of the plurality of types of parameters respectively meeting the plurality of preset conditions and a second timing at which each of the plurality of types of parameters indicative of the amount of operation of the device meets a corresponding one of the plurality of preset conditions.

2. The device according to claim 1, further comprising:

a date and time obtaining unit configured to obtain information indicative of a current date and time,

wherein the determining unit is configured to determine that the fail-safe process is required to be checked each time the current date and time obtained by the date and time obtaining unit meets a preset second condition.

3. The device according to claim 1, wherein the correcting unit is configured to correct each of the plurality of preset conditions so that a time required for each of the plurality of preset conditions to be met approaches a time required for all of the plurality of preset conditions to be met.

4. The device according to claim 1, wherein the determining unit is configured to determine when the fail-safe process is required to be checked for each of the plurality of types of parameters indicative of the amount of operation of the device by determining whether each of the plurality of types of parameters indicative of the amount of operation of the device increases by a corresponding preset amount, the preset amount being preset for each of the plurality of types of parameters indicative of the amount of operation of the device, the device further comprising:

a correcting unit configured to;

obtain an increase in each of the plurality of types of parameters indicative of the amount of operation of the device over a period from a timing when a corresponding one of the plurality of types of parameters of the information meets a corresponding one of the plurality of preset conditions to a timing when all of the plurality of types of parameters indicative of the amount of operation of the device respectively meets the plurality of preset conditions, and

add a preset percentage of the increase in each of the plurality of types of parameters indicative of the amount of operation of the device to the preset amount for a corresponding one of the plurality of types of parameters indicative of the amount of operation of the device to thereby correct the preset amount therefor.

5. The device according to claim 2, wherein the determining unit is configured to determine the first preset condition is met when the amount of operation of the device obtained by the obtaining unit increases by a first preset amount, and determine the second preset condition is met when the current date and time obtained by the date and time obtaining unit increases by a second preset amount, further comprising:

a correcting unit configured to;

obtain, when the second preset condition is met after the first preset condition is met, a first increase in the amount of operation of the device over a period from a timing when the amount of operation of the device meets the first preset condition to a timing when the first and second preset conditions are met;

add a preset percentage of the first increase to the first preset amount to thereby correct the first preset amount;

obtain, when the first preset condition is met after the second preset condition is met, a second increase in an elapsed time from a timing when the second preset condition is met to a timing when the first and second preset conditions are met; and

add a preset percentage of the second increase to the second preset amount to thereby correct the second preset amount.

6. The device according to claim 1, wherein the obtaining unit is configured to obtain, as the information indicative of the amount of operation of the device, a number of starts of the vehicle.

7. The device according to claim 1, wherein the obtaining unit is configured to obtain, as the information indicative of the amount of operation of the device, a travelled distance of the vehicle.

8. The device according to claim 1, wherein the obtaining unit is configured to obtain, as the information indicative of the amount of operation of the device, an accumulated operating time of the vehicle.

9. The device according to claim 1, further comprising:

a date and time obtaining unit configured to obtain information indicative of a current date and time,

wherein the determining unit is configured to determine that the fail-safe process is required to be checked each time the current date and time obtained by the obtaining unit meets a preset condition.

10. The device according to claim 1, further comprising:

an external output unit configured to output information indicative of a result of the check of the fail-safe process externally of the vehicle.

11. The device according to claim 1, wherein the determining unit is configured to determine when the fail-safe process is required to be checked as long as any one of the vehicle is booted up and a drive of the vehicle is terminated.

12. The device according to claim 1, wherein the device comprises a microcomputer incorporating a program area in which a first program for predetermined control of the vehicle is stored, the microcomputer being designed to execute the first program to thereby implement the predetermined control of the vehicle, the program area storing therein a second program that causes the microcomputer to function as each of the executing unit, the instructing unit, the determining unit, and the checking unit, the fail-safe process to reset the microcomputer as the target section.

13. The device according to claim 12, wherein the program area stores therein a third program that causes the microcomputer to execute the fail-safe process, the third program including at a head thereof a non-operation code, the program area having a free space area in which the non-operation code being full of the non-operation code.

14. A device installed in a vehicle for monitoring a target section in the vehicle, the device comprising:

an executing unit configured to execute a fail-safe process for addressing an abnormality in the target section;

an instructing unit configured to instruct the executing unit to execute the fail-safe process when an abnormality occurs in the target section;

a trigger timing generating unit configured to automatically generate a trigger timing for checking whether an abnormality occurs in the fail-safe process;

a checking unit configured to instruct the executing unit to execute the fail-safe process in response to the trigger timing generated by the trigger timing generating unit;

an obtaining unit configured to obtain, as information indicative of an amount of operation of the device, information indicative of a plurality of types of parameters indicative of the amount of operation of the device,

the trigger timing generating unit being configured to automatically generate the trigger timing for checking whether an abnormality occurs in the fail-safe process each time all of the plurality of types of parameters indicative of the amount of operation of the device respectively meet a plurality of preset conditions, the plurality of preset conditions being previously set respectively for the plurality of types of parameters indicative of the amount of operation of the device; and

a correcting unit configured to correct each of the plurality of preset conditions based on a difference between a first timing at which the fail-safe process is required to be checked upon all of the plurality of types of parameters respectively meeting the plurality of preset conditions and a second timing at which each of the plurality of types of parameters indicative of the amount of operation of the device meets a corresponding one of the plurality of preset conditions.

15. The device according to claim 14, wherein the trigger timing generating unit is configured to automatically generate the trigger timing for checking whether an abnormality occurs in the fail-safe process independently of whether an abnormality occurs in the target section.

16. The device according to claim 14, wherein the trigger timing generating unit is configured to automatically generate the trigger timing for checking whether an abnormality occurs in the fail-safe process without the vehicle travelling.