Timing circuit and timing method for measuring time difference between two paths of pulse signals

Abstract

The invention relates to a timing circuit and a timing method for measuring the time difference between two paths of pulse signals, belongs to the technical field of timing circuits, and solves the problems of complex hardware circuit structure and the like of the existing timing circuit. The timing circuit comprises a first JK trigger, a second JK trigger, an AND gate U1, an AND gate 2, an OR gate U3 and a timing assembly. The CLK end of the first JK trigger receives one path of pulse signals, the J end, the K end and the Q non-end are connected with the second input end of the AND gate U2, and the Q end is connected with the second input end of the AND gate U1; the CLK end of the second JK trigger receives the other path of pulse signals, the J end, the K end and the Q non-end are connected with the first input end of the AND gate U1, and the Q end is connected with the first input end of the AND gate U2; the output end of the AND gate U1 is connected with the first input end of the OR gate U3, the output end of the AND gate U2 is connected with the second input end of the OR gate U3, the output end of the OR gate U3 is connected with the timing assembly, and the timing assembly obtains and outputs a timing result based on the counting control pulse output by the OR gate U3.

Description

technical field [0001] The invention relates to the technical field of timing circuits, in particular to a timing circuit and a timing method for measuring the time difference between two pulse signals. Background technique [0002] In the actual application process, when measuring the movement time of a moving object on a movement track, the measurement method used is: align two laser sensors at the two ends of the movement track of the measured object, and then measure the time difference between the actions of the two sensors , the range is 100ms, and the measurement accuracy must be at least 0.1ms. [0003] At present, the function of most timing circuits on the market is to measure the time difference between the rising edge and falling edge of the same pulse signal, and the measurement accuracy is up to 1ms. At the same time, the existing timing circuits for measuring the time difference between the falling or rising edges of two pulse signals generally have problems ...

AI Technical Summary

Problems solved by technology

[0004] In view of the above analysis, the embodiment of the present invention aims to provide a timing circuit and a timing method for measuring the time difference between two pulse signals, so as to solve the problems of complex hardware circuit structure, complex control logic and measurement accuracy existing in existing timing circuits. Lower problems

Images