Low-power-consumption gas ultrasonic flowmeter system based on STM32
An ultrasonic flowmeter, low power consumption technology, applied in the direction of liquid/fluid solid measurement, measurement flow/mass flow, measurement devices, etc., can solve the problems of poor echo signal quality, achieve low power consumption, good stability, The effect of high measurement accuracy
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[0054] Below in conjunction with accompanying drawing, system of the present invention is described in further detail:
[0055] figure 1 It is a schematic diagram of the diameter reduction design of the flow tube of the system of the present invention. The flow tube of the primary instrument of the system of the present invention adopts a reduced-diameter design, the purpose of which is to reduce the length of the straight section of the flow tube and enhance the stability of the flow field. Under the same flow rate, the ratio of the flow velocity of the flow tube after the diameter reduction to that of the flow tube before the diameter reduction is calculated as follows:
[0056] Before diameter reduction, flow tube cross-sectional area S 1 for:
[0057]
[0058] After the diameter is reduced, the cross-sectional area of the flow tube S 2 It consists of 4 parts, namely ① and ③ two sectors, ② and ④ two triangles. Since the two sectors are symmetrical to each other, t...
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