Accurate trigger signal producing method and producing circuit

Abstract

The present invention provides an accurate trigger signal generating method and a generating circuit thereof. The steps are as follows: Step 1, an external basic pulsing signal and a standard clock signal are accessed; the first pulse of a standard clock after the basic pulsing signal rising edge abstracted and a measuring pulse A is exported outward; Step 2, a clock counting unit counts a 10MHz clock taking the pulse A as the starting point; the time interval T1 of the measuring pulse A and a 10MHz frequency standard signal is measured; Step 3, a calculation and treatment unit works out a delay time difference T2 according to an external basic 1PPS time code t< 1PPS >, a trigger time t< trig >, a counting value N and the time interval T1 and generates a reference pulse signal; Step 4,the first pulse B of a standard clock after the reference pulsing signal rising edge abstracted; Step 5 the pulse B is delayed by the time difference T2 and export outward, which generates an accurate trigger pulsing signal. Based on the accurate delay treatment to the basic pulsing signal, the present invention is connected with time frequency standard and realizes that multiple nodes generates the accurate trigger pulsing signal under the uniform time frequency standard.

Description

technical field [0001] The present invention mainly relates to the application field of wide-area measurement and control technology, in particular to a precise trigger signal generation method and a generation circuit for synchronous measurement and collaborative testing in wide-area measurement and control applications, especially suitable for different locations and nodes at the same time Triggering for synchronous measurement and occasions where different nodes conduct collaborative testing according to strict timing relationships, such as distributed data acquisition systems, directional blasting systems, industrial automation systems, and circuits and methods for measuring and controlling each node at a specific time. Background technique [0002] With the rapid development and wide application of distributed wide-area measurement and control technology, in order to realize synchronous testing of different nodes and collaborative testing in accordance with strict timing...

AI Technical Summary

Problems solved by technology

However, there is a quantization error in the method of querying the local time of the detection node, which is determined by the execution time of the process of querying the local time twice in a row. When a trigger signal with higher accuracy is required, this quantization error cannot be ignored.

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