Control system

• US 9,969,387 B2
• Filed: 06/28/2016
• Issued: 05/15/2018
• Est. Priority Date: 08/27/2015
• Status: Active Grant

• Current Assignee: Renesas Electronics Corporation
• Original Assignee: Renesas Electronics Corporation
• Inventors: Park, Kwangsoo
• Primary Examiner(s): Beaulieu, Yonel
• Application Number:
  US15/196,005
• Publication Number:
  US 20170057435A1
• Time in Patent Office: 686 Days
• CPC Class Codes: B60W 2050/0075 Automatic parameter input, automatic initialising or calibrating means
• CPC Class Codes: B60W 2420/403 Image sensing, e.g. optical camera
• CPC Class Codes: B60W 2554/4041 Position
• CPC Class Codes: B60W 2554/801 Lateral distance
• CPC Class Codes: B60W 2554/804 Relative longitudinal speed
• CPC Class Codes: B60W 2556/45 External transmission of data to or from the vehicle
• CPC Class Codes: B60W 30/08 Active safety systems predicting or avoiding probable or impending collision or attempting to minimise its consequences
• CPC Class Codes: B60W 30/16 Control of distance between vehicles, e.g. keeping a distance to preceding vehicle
• CPC Class Codes: B60W 50/06 Improving the dynamic response of the control system, e.g. improving the speed of regulation or avoiding hunting or overshoot
• CPC Class Codes: G08G 1/165 for passive traffic, e.g. including static obstacles, trees
• CPC Class Codes: G08G 1/166 for active traffic, e.g. moving vehicles, pedestrians, bikes

Abstract

A control system includes an information obtaining apparatus, a network, and a control apparatus. The information obtaining apparatus includes a distance information obtaining unit configured to obtain a distance information indicating a distance to an object and a transmission unit configured to transmit the distance information obtained by the distance information obtaining unit. The control apparatus includes a reception unit configured to receive the distance information transmitted by the transmission unit via the network, a distance information correction unit configured to correct the distance information received by the reception unit, and a control unit configured to perform control using the distance information corrected by the distance information correction unit. The distance information correction unit corrects the distance information based on a time taken from when the distance information is obtained by the distance information obtaining unit until the distance information is input to the distance information correction unit.

Claims

1. A control system comprising:

an information obtaining apparatus;

a network; and

a control apparatus,

wherein

the information obtaining apparatus comprises;

a distance information obtaining device configured to obtain distance information indicating a distance to an object; and

a transmitter configured to transmit the distance information obtained by the distance information obtaining device,

the control apparatus comprises;

a receiver configured to receive the distance information transmitted by the transmitter via the network;

a distance information correcting circuit configured to correct the distance information received by the receiver; and

a controller configured to perform control using the distance information corrected by the distance information correcting circuit, and

wherein the distance information correcting circuit corrects a first distance information based on a time between a time when the first distance information is obtained by the distance information obtaining device and a time when the first distance information is input to the distance information correcting circuit from the distance information obtaining device via the network.

2. The control system according to claim 1, wherein

the information obtaining apparatus or the control apparatus comprises a processor configured to perform a predetermined process on the distance information obtained by the distance information obtaining device, and

the distance information correcting circuit corrects the distance information, on which the process has been performed by the processor based on an obtained time indicating a time when the distance information is obtained by the distance information obtaining device and an input time indicating a time when the distance information, on which the process has been performed by the processor, is input to the distance information correcting circuit.

3. The control system according to claim 2, wherein the processor performs an encoding process on the distance information obtained by the distance information obtaining device.

4. The control system according to claim 1, wherein

the control system comprises a plurality of information obtaining apparatuses,

the control apparatus further comprises a storage unit,

the storage unit stores the distance information obtained by the distance information obtaining device and an obtained time indicating a time when the distance information is obtained, and

the distance information correcting circuit corrects the distance information based on the obtained time stored in the storage unit and an input time indicating a time when the distance information is input to the distance information correcting circuit from the storage unit.

5. The control system according to claim 1, wherein

the transmitter transmits the distance information and an obtained time indicating a time when the distance information is obtained by the distance information obtaining device,

the receiver receives the distance information and the obtained time, and

the distance information correcting circuit corrects the distance information based on the obtained time received by the receiver and an input time indicating a time when the distance information is input to the distance information correcting circuit.

6. The control system according to claim 1, wherein

the control apparatus comprises a storage unit that previously stores a time taken from when the distance information is obtained by the distance information obtaining device until the distance information is input to the distance information correcting circuit, and

the distance information correcting circuit uses the time stored in the storage unit to correct the distance information.

7. The control system according to claim 1, wherein the distance information correcting circuit uses a relative speed with respect to the object to correct the distance information.

8. The control system according to claim 7, wherein when the object is a stationary object, the distance information correcting circuit uses a speed of the control system as the relative speed.

9. The control system according to claim 7, wherein when the object is a moving object, the distance information correcting circuit uses a speed calculated from a change in the distance information obtained by the distance information obtaining device as the relative speed.

10. The control system according to claim 1, wherein the network is a network compliant with Ethernet.

11. The control system according to claim 1, wherein the controller controls a vehicle using the distance information.

12. A control system comprising:

a camera;

a network; and

a control apparatus,

wherein

the camera comprises;

an imager configured to capture an image of an object; and

a transmitter configured to transmit the image captured by the imager,

the control apparatus comprises;

a receiver configured to receive the image transmitted by the transmitter via the network;

a distance information generating device configured to generate distance information indicating a distance to the object from the image received by the receiver;

a distance information correcting circuit configured to correct the distance information generated by the distance information generating device; and

a controller configured to perform control using the distance information corrected by the distance information correcting circuit, and

wherein the distance information correcting circuit corrects the distance information based on a time between a time when the image is captured by the imager and a time when the distance information is input to the distance information correcting circuit from the imager via the network.

13. A control system comprising:

an information obtaining apparatus;

a network; and

a control apparatus,

wherein

the information obtaining apparatus comprises;

a distance information obtaining device configured to obtain distance information indicating a distance to an object; and

a transmitter configured to transmit the distance information obtained by the distance information obtaining device,

the control apparatus comprises;

a receiver configured to receive the distance information transmitted by the transmitter via the network;

a delay time calculator; and

a controller,

wherein the delay time calculator calculates a time between a time when the distance information is obtained by the distance information obtaining device and a time when the distance information is input to the delay time calculator from the distance information obtaining device via the network, and

wherein the controller performs control using the distance information received by the receiver and the time calculated by the delay time calculator.