CPU (central processing unit) load testing method for equipment in DCS (distributed control system)

Abstract

The invention discloses a CPU (central processing unit) load testing method for equipment in a DCS (distributed control system), and relates to the field of nuclear power plants. Two continuous voltage values comprising a voltage value V are searched from waveform voltage values of a rising edge and falling edge of each waveform period of the tested equipment respectively, a higher voltage value is taken as a hopping point of the rising edge or falling edge, time at a coordinate point of the higher voltage value is acquired, and the hopping point of the rising edge is subtracted from the hopping point of the falling edge to obtain the CPU load time of the equipment. In the method, waveform period analysis over the whole tested equipment is realized by utilizing a computer, so low error and high efficiency are achieved; the environment of the tested equipment and influence caused by the tested equipment are taken into full account, and waveform hopping is judged based on adjacent data comprising a high level, so accuracy is high; and a final result is represented by percentage so as to be convenient to compare.

Description

technical field [0001] The invention relates to the field of nuclear power plants, in particular to a calculation method for detecting whether the duty cycle between the response time of the DCS system of the nuclear power plant and the CPU operation period is satisfied. Background technique [0002] The CPU operation cycle (Period time) is fixed, and directly affects whether the response time of the safety-level DCS system meets the design requirements. Different system programs have different operating time (Operation time) duty ratio standards for the CPU operating cycle (Period time). Therefore, it is necessary to conduct an operation time test (Operation time measurement) to verify whether the program processing is within a reasonable time range. . [0003] The traditional test method currently used is: first use a waveform recorder to test the data and record the waveform, then manually call out the recorded waveform, select a certain number of waveform cycle data for...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of low response time test efficiency and high manual labor intensity in the DCS system of nuclear power plants in the prior art, the present invention provides a selection method that uses a computer to automatically obtain and automatically distinguish each waveform period, so as to realize the efficiency and accuracy of the entire test process

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