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

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 ...

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

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