Mr. Ming Huang Profile

Ming Huang

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Proceedings Article | 14 October 2021 Paper

Intelligent industrial vortex flowmeter based on MSP430

Zheming Xu, Bin Ma, Xiaotian Fu, Ming Huang

Proceedings Volume 11930, 119303P (2021) https://doi.org/10.1117/12.2611091

KEYWORDS: Microcontrollers, Digital signal processing, LCDs, Signal processing, Signal detection, Power supplies, Digital electronics, Sensors, Filtering (signal processing), Capacitors

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At present, vortex flowmeter still commonly exists two problems that the signal cannot be detected in the low flow rate so that the range ratio is limited, and high-power consumption cannot be applied to the harsh environment of the industrial site. With the design principles of low power consumption and integration, this paper designed a low-power vortex signal processing system based on the MSP430. The low-power operational amplifier TLV2254 is used to implement the preamplifier circuit to complete the charge/voltage conversion, amplification, filtering, shaping and other pre-processing of the signal output from the eddy street sensor. The low-cost and low-power-consumption MSP430F149 is selected as the control core for the signal acquisition and calculation circuit to complete the acquisition, analysis, and calculation of the signal, and control the LCD display of the calculation results. The software part mainly completes the acquisition of vortex signal, spectrum analysis, frequency calculation and display functions. In the laboratory flow test results show that the vortex flowmeter effectively extends the lower limit of the flow signal measurement, expand the range ratio at 5Hz, reduce power consumption makes the instrument work longer about 213 days in FFT mode. Through the combination of software and hardware design such as power supply monitoring, watchdog and software filtering, the anti-interference and safety of the system have also been greatly improved, which can be well applied to the field of industrial instrumentation.

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