Low cost intelligent vortex shedding flowmeter signal processing system based on DSP

Abstract

This invention relates to one whorl flowmeter signal process system based on DSP intelligent and low cost, which is characterized by the following: analogue signal adjusting module, DSP chip and expanding RAM, EEPROM, low voltage monitor circuit, LCD display, keyboard input, analogue output, impulse output and power management module. The system adopts circle spectrum analysis and digital filter combination method to process the output signals of the flowmeter sensor.

Description

Technical field: [0001] The invention relates to a flow measuring instrument, in particular to a low-cost vortex flowmeter signal processing system with a digital signal processor (DSP) as the core and a combination of periodic graph analysis and digital filtering. Background technique: [0002] The vortex flowmeter is widely used in the field of fluid flow measurement because it has no moving parts in the measurement part, has small wear and pressure loss, has a large ideal range ratio, and can measure many fluid media. However, the vortex flow sensor is easily affected by fluid pulsation, pipeline or other vibration sources. Traditional signal processing methods, namely amplification, shaping, filtering and counting, cannot effectively suppress noise, so the measurement accuracy is not high; The threshold level will affect the turndown ratio, resulting in the inability to measure small flows; for different ranges and different measured fluids, the traditional signal proces...

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Problems solved by technology

However, the calculation results of the algorithm, the specific implementation scheme of the system, the experimental test results and the performance indicators of the system are not given in the paper.

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