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Switch type instrument calibration method and device

A calibration method, switch-type technology, applied in the direction of instruments, etc., can solve problems such as system errors

Active Publication Date: 2021-09-14
BEIJING CONST INSTR TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result of the above two aspects, there are systematic errors in the calibration of existing switch-type instruments

Method used

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  • Switch type instrument calibration method and device
  • Switch type instrument calibration method and device
  • Switch type instrument calibration method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] see figure 1 , a pressure (instrument) calibrator, which can be used to calibrate the pressure switch 200 (i.e., a switch-type pressure instrument). Here, the processing module is the MCU main board 110, the second data acquisition part is the switch detection module 120, and the first data acquisition The part is the pressure detection module 130, and the switch detection module 120 and the pressure detection module 130 are respectively connected to the MCU main board 110 for signals.

[0065] The MCU motherboard 110 includes a main control chip 111 and a system clock module 112. The main control chip 111, as the central processing unit of the pressure calibrator, is responsible for the control and management of the pressure calibration process and the processing of the pressure calibration data. The system clock module 112 can be other The module provides a time base.

[0066] The switch detection module 120 includes a switch signal processing unit 121 and a switch d...

Embodiment 2

[0089] like figure 2 Shown is the second embodiment of the pressure calibration system for calibrating switch-type pressure instruments. The difference between this embodiment and the first embodiment is that the pressure calibration system includes a plurality of switch detection modules 120, and each switch detection module 120 can be used for To detect one pressure switch 200, a plurality of switch-type pressure switches 200 share a pressure source module 140 and a pressure detection module 130, that is, a plurality of switch detection modules 120 are respectively connected to the MCU main board 110, and a plurality of pressure switches 200 communicate with each other through pressure pipelines. The pressure source modules 140 communicate with each other, and the pressure sensor 133 of the pressure detection module 130 is connected in series with the pressure pipeline of the pressure source module 140 . The structure and function of each module are the same as those in Emb...

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Abstract

The invention provides a switch type instrument calibration method and device, and the method comprises the steps: separating corresponding physical quantity detection during the switching of a switch state of a switch type instrument into independent detection channels, recording a physical quantity and a timestamp corresponding to the physical quantity, and recording a switch signal and a timestamp corresponding to the switch signal; and with the timestamp during switching of the switch state of the switch type instrument as a medium, determining the switch action value. Therefore, the time delay deviation caused by signal transmission and judgment can be eliminated, and the requirement on the real-time performance of signal transmission of a detection / calibration system is reduced.

Description

technical field [0001] The invention relates to a calibration technology for a switch-type instrument, in particular to a calibration method and device for a switch-type instrument. Background technique [0002] Switching instruments are common control devices in the field of temperature and pressure control. For example, temperature switches and pressure switches (switching instruments used in the field of temperature and pressure) are components that generate switching actions when the temperature / pressure reaches a specific value or The device is mainly composed of temperature sensitive elements / pressure sensing elements and action switches, which play the role of control, protection and limitation, and are widely used in motors, household appliances, etc.; the switch action value is its key indicator, especially for high-precision control In some occasions, the switch action value is the key factor affecting the control effect. Therefore, switching instruments need to c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D18/00
CPCG01D18/00
Inventor 罗靖豪万春辉崔明涛
Owner BEIJING CONST INSTR TECH INC
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