Automatic calibration system and method for analog input module of nuclear-safety DCS

An input module and automatic calibration technology, applied in the general control system, control/regulation system, test/monitoring control system, etc., can solve the problems of low efficiency, complicated calibration, safety, reliability and accuracy that cannot meet the nuclear safety level, etc. problems, to achieve the effect of high efficiency, simple and convenient use, and wide coverage

Active Publication Date: 2019-07-16
CHINA NUCLEAR CONTROL SYST ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problems of safety, reliability and precision in the above-mentioned prior art that cannot meet the nuclear safety level, as well as complex calibration and low efficiency, the present invention provides an automatic calibration system and method for an analog input module of a nuclear safety DCS

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  • Automatic calibration system and method for analog input module of nuclear-safety DCS
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  • Automatic calibration system and method for analog input module of nuclear-safety DCS

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Embodiment 1

[0030] The embodiment of the present invention provides an automatic calibration system for an analog input module of a nuclear safety level DCS, the system includes a calibration device for a programmable instrument; wherein, the calibration device for a programmable instrument includes a host computer, a high-precision signal generator and a multi- switch; the host computer sends a command to the high-precision signal generator to control it to generate a current signal, and the current signal is selected and output to the acquisition channel of the analog input module through a multi-way switch to calibrate the data acquisition channel and self-diagnosis channel .

[0031] In this embodiment, only by setting up a set of calibration equipment for programmable instruments, the data acquisition channel calibration, self-diagnosis calibration and multi-channel calibration of the nuclear safety level DCS analog input module can be automatically realized without other additional a...

Embodiment 2

[0038] Based on the above-mentioned embodiment 1, the embodiment of the present invention provides an automatic calibration system for an analog input module of a nuclear safety level DCS, such as figure 1 As shown, the system includes calibration equipment for programmable instruments. In this embodiment, the calibration equipment for programmable instruments includes: a host computer (PC computer), a high-precision signal generator connected to the PC through a serial port, and a multi-way switch ,Such as figure 2 As shown, the shown host computer sends commands to the high-precision signal generator through the serial port, let it output the specified standard current signal, and select the output channel through the multi-way switch (that is, the acquisition channel 0 to 15 of the analog input module); The current signal is selected and output to the acquisition channel of the analog input module through the multi-way switch to calibrate the data acquisition channel and t...

Embodiment 3

[0052] Based on the calibration system proposed in the above-mentioned embodiment 1 and embodiment 2, the actual calibration verification is carried out, and the specific process is as follows:

[0053] 1. Enter calibration mode

[0054] according to figure 1 Wiring equipment, after the analog input module (AI module) downloads the program, power on again, and the programmable instrument uses the calibration equipment to enter the calibration mode according to the command.

[0055] 2. Channel calibration

[0056] Such as image 3 As shown, the acquisition channel (AC) is calibrated first, and then the self-diagnosis channel (BC) is calibrated.

[0057] (1) Acquisition channel (AC) calibration

[0058] Taking the 4mA calibration of channel 0 as an example, the calibration equipment for programmable instruments outputs a standard current signal of 4mA (with an accuracy of 0.02%) to channel 0, and the code value collected by the MCU through the acquisition channel is sent bac...

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Abstract

The invention discloses an automatic calibration system and method for an analog input module of a nuclear-safety DCS. The automatic calibration system and method are implemented by the adoption of programmable instrument calibration equipment, wherein the programmable instrument calibration equipment comprises an upper computer, a high-precision signal generator and a multi-way switch; and the upper computer sends a command to the high-precision signal generator and controls the high-precision signal generator to generate a current signal, and the current signal is selected by the multi-way switch and output to a collection channel of the analog input module for calibration of a data collection channel and a self-diagnosis channel. According to the automatic calibration system and method,data collection channel calibration, self-diagnosis calibration and multichannel calibration of the analog input module of the nuclear-safety DCS are automatically realized only through arrangement of the programmable instrument calibration equipment; the coverage is wide, calibration of the data collection channel and the self-diagnosis channel can be realized simultaneously, and reliability andsafety are improved; and beside, the whole calibration process is automatically implemented through software, manual intervention is not needed, calibration of multiple channels can be realized simultaneously, and efficiency is high.

Description

technical field [0001] The invention relates to the technical field of nuclear safety level DCS module calibration, in particular to an automatic calibration system and method for an analog quantity input module of a nuclear safety level DCS. Background technique [0002] The safety-level DCS platform is a digital control system for nuclear power plant control, and the analog input module of the safety-level DCS platform is a special module for collecting analog signals in the system. [0003] The analog input module in the safety-level DCS system of a nuclear power plant needs to have the acquisition function of high-precision analog signals, and at the same time, it must have the diagnosis function of the acquisition channel. That is to say, the analog input module of the safety-level DCS system of the nuclear power plant is required to have high safety, high reliability, high precision, high stability and other performances. [0004] Therefore, in the actual production a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B23/02
CPCG05B23/0208G05B23/0213
Inventor 马权罗琦钟科韩文兴杨斌蒋维董长龙余波马宇潘智力张文帅孙福海魏荣超黄俊李晓龙赵洋宋小明李昆
Owner CHINA NUCLEAR CONTROL SYST ENG
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