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Automatic testing platform and testing method for electromagnetic flow meter circuit boards

A technology of automated testing and electromagnetic flowmeter, applied in the field of testing, can solve problems such as the inability to guarantee the quality of products leaving the factory, the large differences in manual recorded data, and the inability to find hidden problems well, so as to reduce labor costs, ensure factory quality, and operate Convenient and simple effect

Pending Publication Date: 2018-06-12
青天伟业仪器仪表有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional aging is to power on the circuit board, connect it to a fixed flow signal source, and record it manually. This method requires a lot of manpower in a large number of batches of aging tests, and can only detect a single flow point and record the data manually. Large differences cannot find hidden problems very well, and cannot guarantee the factory quality of products

Method used

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  • Automatic testing platform and testing method for electromagnetic flow meter circuit boards
  • Automatic testing platform and testing method for electromagnetic flow meter circuit boards
  • Automatic testing platform and testing method for electromagnetic flow meter circuit boards

Examples

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Embodiment 1

[0032] Embodiment 1: as Figure 1~Figure 2 As shown, the present invention provides an electromagnetic flowmeter circuit board automated testing platform, comprising: an analog signal generator 1, a signal acquisition module 3 and an industrial computer 4;

[0033] One end of the analog signal generator 1 is connected to the circuit board 2 to be tested, and the other end of the circuit board 2 to be tested is connected to the signal acquisition module 3; the analog signal generator 1 includes an excitation signal input port 101, a signal conversion circuit 102 and Differential mode signal output port 103; described circuit board 2 to be tested comprises excitation signal output port 201, differential mode signal input port 202, signal processing and conversion module 203 and current signal output port 204; Described signal acquisition module 3 comprises current signal Input port 301, data acquisition and conversion unit 302 and RS485 bus interface 303; Described signal acquis...

Embodiment 2

[0042] Example 2: Please refer to image 3 , image 3 It is a schematic flowchart of an automatic testing method for an electromagnetic flowmeter circuit board provided by an embodiment of the present invention; this embodiment provides an automatic testing method for an electromagnetic flowmeter circuit board, which specifically includes the following steps:

[0043] Step S201: Set the burn-in test time, the fluctuation determination range and the data sampling frequency of the current signal of the signal acquisition module 3 on the industrial computer 4 .

[0044] Step S202: Connect one end of the circuit board 2 to be tested to the analog signal generator 1, and the EXT+ and EXT- ports of the excitation signal input port 101 and the excitation signal output port 201 are connected respectively; the differential mode signal output port 103 and the differential mode The SGND, SING+ and SING- ports in the signal input port 202 are respectively connected correspondingly; the c...

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Abstract

The invention discloses an automatic testing platform for electromagnetic flow meter circuit boards. The automatic testing platform comprises an analog signal generator, a signal acquisition module and an industrial personal computer. One end of the analog signal generator is connected to a to-be-tested circuit board, and the other end of the to-be-tested circuit board is connected with the signalacquisition module. The signal acquisition module is connected with the industrial personal computer through a RS485 bus. The invention further provides an automatic testing method for the electromagnetic flow meter circuit boards. The method includes steps: the to-be-tested circuit board sends a constant-current excitation signal to the analog signal generator, and a signal conversion circuit inthe analog signal generator converts the constant-current excitation signal into a different-mode signal; after the to-be-tested circuit board receives the different-mode signal, the different-mode signal is converted into a current signal through a signal processing and converting module; the current signal of the to-be-tested circuit board is converted into a RS485 signal which is then transmitted to the industrial personal computer; the industrial personal computer receives the RS485 signal and processes the RS485 signal prior to storage, analysis or displaying. By the automatic testing platform and method for the electromagnetic flow meter circuit boards, the to-be-tested circuit board in abnormal operation can be quickly detected out.

Description

technical field [0001] The invention relates to the technical field of testing, in particular to an automatic testing platform and testing method for an electromagnetic flowmeter circuit board. Background technique [0002] At present, electromagnetic flowmeters are widely used in petroleum, chemical, steel, food, electric power, papermaking, metallurgy, water supply and drainage, petrochemical, pharmaceutical and other industries for flow measurement and control in production processes. Because the flowmeter is mainly used for industrial flow measurement, it is necessary to ensure the stability of long-term work. The circuit boards used must undergo long-term aging tests before leaving the factory to ensure stable work. Conventional aging is to power on the circuit board, connect it to a fixed flow signal source, and record it manually. This method requires a lot of manpower in a large number of batches of aging tests, and can only detect a single flow point and record the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/28G01F25/00
CPCG01F25/00G01R31/28
Inventor 赵贺刘玲黄田辉张盛海马鹏飞
Owner 青天伟业仪器仪表有限公司
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