Self-testing method and testing method for synchronization precision of time synchronization system

Abstract

The invention provides a self-testing method for synchronization precision of a time synchronization system, and the method comprises the steps: starting a synchronization function of the time synchronization system, and enabling the time synchronization system to generate a PPS pulse and / or an output synchronization pulse; connecting the PPS pulse and / or the output synchronization pulse to a synchronization pulse input interface of the time synchronization system; and calling computing resources provided by the time synchronization system, and sampling and computing the PPS pulse and / or the output synchronization pulse to judge whether the PPS pulse and / or the output synchronization pulse meet / meets preset synchronization precision or not. In addition, the invention also provides a testing method for synchronization precision of the time synchronization system. By implementing the self-testing method or the testing method provided by the invention, the test cost for the precision testof the time synchronization system can be reduced, and the test efficiency can be improved.

Description

technical field [0001] The invention relates to the field of clock synchronization of computer equipment, in particular to a method for self-testing the synchronization accuracy of a time synchronization system, and also to a method for testing the synchronization accuracy of the time synchronization system. Background technique [0002] In specific applications such as automatic driving, real-time positioning, and map construction, sensor data from multiple sensors (cameras, lidars, and inertial measurement units) need to be fused, and the fusion is usually achieved by a time synchronization system. The synchronization system can solve the data fusion error caused by the delay of sensor data transmission, so as to achieve better fusion effect. [0003] For the time synchronization system, the accuracy of time synchronization is an important evaluation index, and the evaluation of the accuracy involves the pulse per second (Pulse Per Second, PPS) timing accuracy of the time ...

AI Technical Summary

Problems solved by technology

Based on the above method, the disadvantages of the existing technology are: on the one hand, when measuring the precise time interval between two pulses, it is necessary to set the time scale of the oscilloscope to the microsecond or nanosecond level, and then manually move the cursor by the operator The time interval is tested, and a single measurement cannot obtain accurate results. It is more common to perform statistical calculations after multiple measurements to obtain statistical statistical results for evaluation. The entire process requires a lot of manual participation , not only the operation steps are repeated and cumbersome, but also the efficiency is low, and it is greatly affected by human factors; GHz level, this type of oscilloscope is very expensive, resulting in a high cost for the test of the high-precision time synchronization system

In addition, the accuracy test for some specific items in the time synchronization system in the prior art cannot be obtained through the oscilloscope test, for example, whether the generation time of the PPS pulse is an entire second in the system time cannot be tested through the oscilloscope

Due to the existence of the above defects, the accuracy test for the time synchronization system has been difficult to achieve the expected ideal accuracy

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