Obstacle detecting apparatus with error detection and recovery

• US 7,689,360 B2
• Filed: 07/26/2005
• Issued: 03/30/2010
• Est. Priority Date: 07/28/2004
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Ide, Hideyuki, Horikawa, Kenichiro
• Primary Examiner(s): Tran; Khoi
• Assistant Examiner(s): Broadhead; Brian J
• Application Number:
  US11/189,085
• Publication Number:
  US 20060025913A1
• Time in Patent Office: 1,708 Days
• Field of Search: 701/301, 701/96, 701/34, 340/435, 342/70, 735/79, 736/28, 307/10.1
• US Class Current: 701/301
• CPC Class Codes: B60R 2021/01068 between different sensors and airbag control unit
• CPC Class Codes: B60R 2021/01184 Fault detection or diagnostic circuits in power circuits B60R2021/01129
• CPC Class Codes: B60R 21/0134 responsive to imminent contact with an obstacle , e.g. using radar systems

Abstract

An obstacle detecting apparatus includes sensors and a processing unit. Each of the sensors are rendered operational by predetermined parameters. The processing unit transmits the parameters to the sensors and includes a vehicle state detector, a condition determiner, a communication controller, and a parameter setting processor. The vehicle state detector detects a running state of the vehicle. The condition determiner determines that the running state of the vehicle is one of an operating condition indicating that the sensors should be operated and a forbidding condition indicating that the operation of the sensors should be forbidden. The communication controller performs communication with the sensors. The parameter setting processor transmits the parameters to the sensors and receives a response indicating completion of the process. The parameter setting processor repeats the process upon either a parameter of one sensor not being set, or communication being terminated while the forbidding condition is identified.

Claims

1. An obstacle detecting apparatus for detecting the presence of an obstacle in the vicinity of a vehicle, comprising:

plural sensors, each rendered operational by one of plural predetermined parameters; and

a processing unit for transmitting the plural predetermined parameters to the plural sensors, the processing unit comprising;

vehicle state detector configured to detect a running state of the vehicle,

condition determiner configured to determine that the running state of the vehicle corresponds to one of an operating condition that indicates that the plural sensors should be operated and a forbidding condition that indicates that the operation of the plural sensors should be forbidden,

communication controller configured to communicate with the plural sensors, and

parameter setting processor configured to implement a parameter setting process for transmitting the plural predetermined parameters to the plural sensors and receiving a response from each of the plural sensors that indicates completion of the parameter setting process, wherein

the parameter setting processor repeats the parameter setting process for all of the plural sensors upon at least one of the following occurring;

the parameter of at least one sensor of the plural sensors is not set, and

communication by the communication controller is impossible,

when the condition determiner determines that the running state of the vehicle corresponds to the forbidding condition.

2. The obstacle detecting apparatus according to claim 1, wherein

the parameter setting processor implements the parameter setting process after the processing unit is powered ON.

3. The obstacle detecting apparatus according to claim 1, further comprising error identifier configured to identify the occurrence of an error if the communication with the at least one sensor by the communication controller is impossible for a predetermined time or longer

4. The obstacle detecting apparatus according to claim 3, further comprising error warning means for warning that the occurrence of an error has been identified in any one of the cases where the occurrence of an error is identified by the error identifier and the case where a response indicating completion of the parameter setting process cannot be received by the parameter setting processor.

5. The obstacle detecting apparatus according to claim 4, wherein

the error warning means includes at least one of display means having a display screen and sound output means for outputting a sound.

6. The obstacle detecting apparatus according to claim 1, wherein:

the vehicle state detector detects a speed of the vehicle and a shift position of a transmission of the vehicle; and

the condition determiner determines that the running state of the vehicle corresponds to the operating condition when the vehicle speed is equal to or lower than a predetermined speed and the transmission is at a shift position for driving the vehicle forward or reverse.

7. The obstacle detecting apparatus according to claim 1, wherein

the plural sensors implement the detection of an obstacle if the condition determiner determines that the running state of the vehicle corresponds to the operating condition and stops the detection of an obstacle if the condition determiner determines that the running state of the vehicle corresponds to the forbidding condition.

8. The obstacle detecting apparatus according to claim 1, wherein

the plural sensors are provided in any one of a front bumper and a rear bumper of the vehicle.

9. An obstacle detecting apparatus for detecting the presence of an obstacle in the vicinity of a vehicle, comprising:

a sensor rendered operational by a predetermined parameter; and

a processing unit for transmitting the predetermined parameter to the sensor, the processing unit comprising;

a vehicle state detector for detecting a running state of the vehicle,

a condition determiner for determining that the running state of the vehicle corresponds to one of an operating condition that indicates that the sensor should be operated and a forbidding condition that indicates that the operation of the sensor should be forbidden,

a communication controller for communicating with the sensor, and

a parameter setting processor for implementing a parameter setting process for transmitting the predetermined parameter to the sensor and receiving a response from the sensor that indicates completion of the parameter setting process, wherein

the parameter setting processor repeats the parameter setting process for the sensor upon at least one of the following occurring;

the predetermined parameter of the sensor is not set, and

communication by the communication controller is impossible,

when the condition determiner determines that the running state of the vehicle corresponds to the forbidding condition.

10. The obstacle detecting apparatus according to claim 9, wherein

the parameter setting processor implements the parameter setting process after the processing unit is powered ON.

11. The obstacle detecting apparatus according to claim 9, further comprising an error identifier for identifying the occurrence of an error if the communication with the sensor by the communication controller is impossible for a predetermined time or longer.

12. The obstacle detecting apparatus according to claim 11, further comprising an error warning device for warning that the occurrence of an error has been identified in any one of the cases where the occurrence of an error is identified by the error identifier and the case where a response indicating completion of the parameter setting process cannot be received by the parameter setting processor.

13. The obstacle detecting apparatus according to claim 12, wherein the error warning device includes at least one of a display having a display screen and speaker for outputting a sound.

14. The obstacle detecting apparatus according to claim 9, wherein:

the vehicle state detector detects a speed of the vehicle and a shift position of a transmission of the vehicle; and

the condition determiner determines that the running state of the vehicle corresponds to the operating condition when the vehicle speed is equal to or lower than a predetermined speed and the transmission is at a shift position for driving the vehicle forward or reverse.

15. The obstacle detecting apparatus according to claim 9, wherein

the sensor implements the detection of an obstacle if the condition determiner determines that the running state of the vehicle corresponds to the operating condition and stops the detection of an obstacle if the condition determiner determines that the running state of the vehicle corresponds to the forbidding condition.

16. The obstacle detecting apparatus according to claim 9, wherein

the sensor one of a plurality of sensors provided in any one of a front bumper and a rear bumper of the vehicle.