Vehicular vision system using image data transmission and power supply via a coaxial cable
A vehicular vision system includes an electronic control unit (ECU) disposed at a vehicle and a camera having a CMOS imaging sensor operable to capture image data. Image data captured by the imaging sensor of the camera is conveyed from the camera to the ECU via a single core coaxial cable. The camera is in bidirectional communication with the ECU over the single core coaxial cable. The single core coaxial cable commonly carries (i) image data captured by the imaging sensor for processing at a data processor of the ECU and (ii) power from a DC power supply of the ECU to the camera. Image data captured by the imaging sensor is serialized at a data serializer of the camera and is conveyed to the ECU via the single core coaxial cable and is deserialized at the ECU by a data deserializer of the ECU.
1. A vehicular vision system, said vehicular vision system comprising:
a front camera disposed at a vehicle equipped with said vehicular vision system, said front camera viewing at least forward of the equipped vehicle;
said front camera comprising a CMOS imaging sensor operable to capture image data;
wherein said front camera is disposed at a windshield of the equipped vehicle and views forward through the windshield of the equipped vehicle;
an electronic control unit (ECU) disposed at the vehicle and comprising (i) a data processor and (ii) a DC power supply;
wherein image data captured by the CMOS imaging sensor of said front camera is conveyed from said front camera to the ECU via a single core coaxial cable;
wherein said front camera is in bidirectional communication with the ECU over the single core coaxial cable;
wherein the single core coaxial cable commonly carries (i) image data captured by the CMOS imaging sensor of said front camera to the ECU for processing at the data processor of the ECU and (ii) power from the DC power supply of the ECU to said front camera;
wherein said front camera comprises a data serializer and the ECU comprises a data deserializer, and wherein image data captured by the CMOS imaging sensor is serialized at the data serializer and is conveyed to the ECU via the single core coaxial cable and is deserialized at the ECU by the data deserializer; and
wherein the vehicular vision system, responsive to processing at the ECU of image data captured by said front camera and conveyed to the ECU via the single core coaxial cable, generates an output for a driving assist system of the equipped vehicle.
2. The vehicular vision system of claim 1 , wherein the driving assist system of the equipped vehicle comprises a headlamp control system.
3. The vehicular vision system of claim 2 , wherein the driving assist system of the equipped vehicle comprises a lane departure warning system.
4. The vehicular vision system of claim 3 , wherein image data captured by the CMOS imaging sensor is transmitted to the ECU via the single core coaxial cable using a Gigabit Multimedia Serial Link (GMSL) protocol.
5. The vehicular vision system of claim 3 , wherein image data captured by the CMOS imaging sensor is transmitted to the ECU via the single core coaxial cable using an FPD-Link III protocol.
6. The vehicular vision system of claim 3 , wherein the driving assist system of the equipped vehicle comprises a traffic sign recognition system.
7. The vehicular vision system of claim 6 , wherein the single core coaxial cable comprises a 50 ohm single core coaxial cable.
8. The vehicular vision system of claim 6 , wherein the single core coaxial cable comprises a 75 ohm single core coaxial cable.
9. The vehicular vision system of claim 6 , wherein the single core coaxial cable comprises (i) an inner metallic core, (ii) a dielectric medium, (iii) a foil screen, (iv) an outer metallic conductor and (v) an outer sheath.
10. The vehicular vision system of claim 2 , wherein signal attenuation by the single core coaxial cable is below 100 dB at a frequency of 1 GHz per 100 m length of the single core coaxial cable.
11. The vehicular vision system of claim 2 , wherein signal attenuation by the single core coaxial cable is below 150 dB at a frequency of 2 GHz per 100 m length of the single core coaxial cable.
12. The vehicular vision system of claim 2 , wherein signal attenuation by the single core coaxial cable is below 180 dB at a frequency of 3 GHz per 100 m length of the single core coaxial cable.
13. The vehicular vision system of claim 1 , wherein image data captured by the CMOS imaging sensor of said front camera is transmitted via the single core coaxial cable at a data transmission rate of at least 1.6 Gbps.
14. The vehicular vision system of claim 1 , wherein power carried by the single core coaxial cable from the DC power supply of the ECU to said front camera is at an electrical current less than or equal to 900 mA.
15. The vehicular vision system of claim 1 , wherein the single core coaxial cable transmits calibration data from said front camera to the ECU.
16. The vehicular vision system of claim 15 , wherein the single core coaxial cable transmits calibration data from said front camera to the ECU responsive to a triggering event.
17. The vehicular vision system of claim 15 , wherein the single core coaxial cable transmits calibration data from said front camera to the ECU at an initial activation of said front camera.
18. The vehicular vision system of claim 1 , wherein the single core coaxial cable transmits initialization data to the ECU at initiation of said front camera.
19. A vehicular vision system, said vehicular vision system comprising:
a rear backup camera disposed at a vehicle equipped with said vehicular vision system, said rear backup camera viewing at least rearward of the equipped vehicle;
said rear backup camera comprising a CMOS imaging sensor operable to capture image data;
an electronic control unit (ECU) disposed at the vehicle and comprising (i) a data processor and (ii) a DC power supply;
wherein image data captured by the CMOS imaging sensor of said rear backup camera is conveyed from said rear backup camera to the ECU via a single core coaxial cable;
wherein said rear backup camera is in bidirectional communication with the ECU over the single core coaxial cable;
wherein the single core coaxial cable commonly carries (i) image data captured by the CMOS imaging sensor of said rear backup camera to the ECU for processing at the data processor of the ECU and (ii) power from the DC power supply of the ECU to said rear backup camera;
wherein said rear backup camera comprises a data serializer and the ECU comprises a data deserializer, and wherein image data captured by the CMOS imaging sensor is serialized at the data serializer and is conveyed to the ECU via the single core coaxial cable and is deserialized at the ECU by the data deserializer;
wherein the vehicular vision system, responsive to processing at the ECU of image data captured by said rear backup camera and conveyed to the ECU via the single core coaxial cable, generates an output provided to a video display device of the equipped vehicle; and
wherein said video display device is operable to display video derived from image data images captured by the rear backup camera of the equipped vehicle during a reversing maneuver of the equipped vehicle to assist a driver of the equipped vehicle in backing up the equipped vehicle.
20. The vehicular vision system of claim 19 , wherein responsive to processing at the ECU of image data captured by said rear backup camera and conveyed to the ECU via the single core coaxial cable, an object present rearward of the equipped vehicle during the reversing maneuver is detected.
21. The vehicular vision system of claim 20 , wherein signal attenuation by the single core coaxial cable is below 100 dB at a frequency of 1 GHz per 100 m length of the single core coaxial cable.
22. The vehicular vision system of claim 20 , wherein signal attenuation by the single core coaxial cable is below 150 dB at a frequency of 2 GHz per 100 m length of the single core coaxial cable.
23. The vehicular vision system of claim 20 , wherein signal attenuation by the single core coaxial cable is below 180 dB at a frequency of 3 GHz per 100 m length of the single core coaxial cable.
24. The vehicular vision system of claim 20 , wherein the detected object is in a path of reverse travel of the equipped vehicle when the equipped vehicle is backing up.
25. The vehicular vision system of claim 24 , wherein the single core coaxial cable comprises (i) an inner metallic core, (ii) a dielectric medium, (iii) a foil screen, (iv) an outer metallic conductor and (v) an outer sheath.
26. The vehicular vision system of claim 19 , wherein the single core coaxial cable comprises a 50 ohm single core coaxial cable.
27. The vehicular vision system of claim 19 , wherein the single core coaxial cable comprises a 75 ohm single core coaxial cable.
28. The vehicular vision system of claim 19 , wherein image data captured by the CMOS imaging sensor of said rear backup camera is transmitted via the single core coaxial cable at a data transmission rate of at least 1.6 Gbps.
29. The vehicular vision system of claim 19 , wherein power carried by the single core coaxial cable from the DC power supply of the ECU to said rear backup camera is at an electrical current less than or equal to 900 mA.
30. The vehicular vision system of claim 19 , wherein the single core coaxial cable transmits calibration data from said rear backup camera to the ECU.
31. The vehicular vision system of claim 30 , wherein the single core coaxial cable transmits calibration data from said rear backup camera to the ECU responsive to a triggering event.
32. The vehicular vision system of claim 30 , wherein the single core coaxial cable transmits calibration data from said rear backup camera to the ECU at an initial activation of said rear backup camera.
33. The vehicular vision system of claim 19 , wherein the single core coaxial cable transmits initialization data to the ECU at initiation of said rear backup camera.
34. The vehicular vision system of claim 19 , wherein image data captured by the CMOS imaging sensor is transmitted to the ECU via the single core coaxial cable using a Gigabit Multimedia Serial Link (GMSL) protocol.
35. The vehicular vision system of claim 19 , wherein image data captured by the CMOS imaging sensor is transmitted to the ECU via the single core coaxial cable using an FPD-Link III protocol.
36. A vehicular vision system, said vehicular vision system comprising:
an internal cabin surveillance camera disposed at a vehicle equipped with said vehicular vision system, said internal cabin surveillance camera viewing interior of the equipped vehicle;
said internal cabin surveillance camera comprising a CMOS imaging sensor operable to capture image data;
an electronic control unit (ECU) disposed at the vehicle and comprising (i) a data processor and (ii) a DC power supply;
wherein image data captured by the CMOS imaging sensor of said internal cabin surveillance camera is conveyed from said internal cabin surveillance camera to the ECU via a single core coaxial cable;
wherein said internal cabin surveillance camera is in bidirectional communication with the ECU over the single core coaxial cable;
wherein the single core coaxial cable commonly carries (i) image data captured by the CMOS imaging sensor of said internal cabin surveillance camera to the ECU for processing at the data processor of the ECU and (ii) power from the DC power supply of the ECU to said internal cabin surveillance camera;
wherein image data captured by the CMOS imaging sensor of said internal cabin surveillance camera is transmitted via the single core coaxial cable at a data transmission rate of at least 1.6 Gbps;
wherein power carried by the single core coaxial cable from the DC power supply of the ECU to said internal cabin surveillance camera is at an electrical current less than or equal to 900 mA;
wherein said internal cabin surveillance camera comprises a data serializer and the ECU comprises a data deserializer, and wherein image data captured by the CMOS imaging sensor is serialized at the data serializer and is conveyed to the ECU via the single core coaxial cable and is deserialized at the ECU by the data deserializer; and
wherein, responsive to processing at the ECU of image data captured by said internal cabin surveillance camera and conveyed to the ECU via the single core coaxial cable, an object present interior of the equipped vehicle is detected.
37. The vehicular vision system of claim 36 , wherein the ECU is incorporated in an interior rearview mirror assembly of the equipped vehicle.
38. The vehicular vision system of claim 37 , wherein the single core coaxial cable comprises a 50 ohm single core coaxial cable.
39. The vehicular vision system of claim 37 , wherein the single core coaxial cable comprises a 75 ohm single core coaxial cable.
40. The vehicular vision system of claim 36 , wherein signal attenuation by the single core coaxial cable is below 100 dB at a frequency of 1 GHz per 100 m length of the single core coaxial cable.
41. The vehicular vision system of claim 40 , wherein the single core coaxial cable comprises (i) an inner metallic core, (ii) a dielectric medium, (iii) a foil screen, (iv) an outer metallic conductor and (v) an outer sheath.
42. The vehicular vision system of claim 36 , wherein signal attenuation by the single core coaxial cable is below 150 dB at a frequency of 2 GHz per 100 m length of the single core coaxial cable.
43. The vehicular vision system of claim 36 , wherein signal attenuation by the single core coaxial cable is below 180 dB at a frequency of 3 GHz per 100 m length of the single core coaxial cable.
44. The vehicular vision system of claim 36 , wherein image data captured by the CMOS imaging sensor of said internal cabin surveillance camera is transmitted via the single core coaxial cable at a data transmission rate of at least 1.6 Gbps.
45. The vehicular vision system of claim 36 , wherein the single core coaxial cable transmits calibration data from said internal cabin surveillance camera to the ECU.
46. The vehicular vision system of claim 45 , wherein the single core coaxial cable transmits calibration data from said internal cabin surveillance camera to the ECU responsive to a triggering event.
47. The vehicular vision system of claim 45 , wherein the single core coaxial cable transmits calibration data from said internal cabin surveillance camera to the ECU at an initial activation of said internal cabin surveillance camera.
48. The vehicular vision system of claim 36 , wherein the single core coaxial cable transmits initialization data to the ECU at initiation of said internal cabin surveillance camera.
49. The vehicular vision system of claim 36 , wherein image data captured by the CMOS imaging sensor is transmitted to the ECU via the single core coaxial cable using a Gigabit Multimedia Serial Link (GMSL) protocol.
50. The vehicular vision system of claim 36 , wherein image data captured by the CMOS imaging sensor is transmitted to the ECU via the single core coaxial cable using an FPD-Link III protocol.