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Time synchronization triggering device and method

A technology of time synchronization and trigger device, which is applied in the direction of time division multiplexing system, TV, color TV parts, etc., to achieve high-precision time synchronization performance, ensure effectiveness, and ensure the effect of synchronization accuracy

Pending Publication Date: 2022-06-10
ZHIJI AUTOMOTIVE TECH CO LTD
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AI Technical Summary

Problems solved by technology

Because it synchronizes time at the application level, it cannot effectively control the delay between data, and cannot coordinate the time synchronization of more than two industrial computers

Method used

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  • Time synchronization triggering device and method
  • Time synchronization triggering device and method
  • Time synchronization triggering device and method

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Embodiment Construction

[0015] like Figure 1~Figure 2 As shown, the device 10 includes a satellite inertial navigation module 11 , an industrial computer 12 , a time synchronization hardware module 13 and at least one camera 14 .

[0016] Specifically, the satellite inertial navigation module 11 is used to receive the GPS radio frequency signal through the GPS antenna 19, and output an uninterrupted time data frame, and the time data frame has a GPS time stamp. The satellite inertial navigation module 11 can be a small satellite inertial device, which includes a satellite positioning system (GPS (Global Positioning System) / Beidou Satellite Navigation System / GNSS (Global Navigation Satellite System)) and an inertial navigation system (Inertial Navigation System, referred to as INS) directional positioning navigation system. According to the complementary characteristics of INS and satellite navigation functions, the overall navigation accuracy and navigation performance are improved by combining the...

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Abstract

The invention provides a time synchronization triggering device and method. The device comprises a satellite inertial navigation module, an industrial personal computer, a time synchronization hardware module and at least one camera. Time signal fitting is carried out based on the GPS timestamp and the CPU hardware timestamp, the synchronization precision between different types of sensors and the industrial personal computer can be ensured, high-precision time synchronization performance still exists in some occasions where the GPS cannot be applied, and the effectiveness of time data is ensured. According to the invention, a hardware synchronization mode based on a PTP protocol can be provided, a time synchronization mode based on an NTP protocol can be provided, a time synchronization hardware module is adopted to synchronously trigger multiple cameras through a CPLD unit, and meanwhile, PPS and CAN protocol modes are provided to synchronize other sensors.

Description

technical field [0001] The embodiments of the present application relate to the technical field of automatic driving, and in particular to a time-synchronized triggering device and method for a true value test system of an automatic driving vehicle. Background technique [0002] Self-driving vehicles are integrated and intelligent new-age technology products that integrate environmental perception, path planning, pattern state recognition, and vehicle control. In order to realize autonomous driving, information from various sensors must be borrowed and fused to identify the environmental information in which the vehicle is located, and then make planning decisions. Since the system time, processing time and data transmission time of each sensor may be different, the automatic driving system is very sensitive to time, and it also puts forward higher requirements for time synchronization. [0003] Due to the extremely complex and time-consuming development and testing of vehi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06H04N5/04H04L69/28
CPCH04J3/0661H04J3/0676H04N5/04H04L69/28
Inventor 俞剑峰叶枫王远远张春鑫
Owner ZHIJI AUTOMOTIVE TECH CO LTD
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