Vibration type flow meter characteristic signal extraction method
A technology of characteristic signal and extraction method, which is applied in the direction of volume/mass flow generated by mechanical effects, and through the detection of dynamic effects of fluid flow, etc., and can solve problems such as large amount of calculation, modal confusion, and white noise residue
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[0062] attached figure 2 Middle: 1. DH-131E acceleration sensor 2. Fluid flow direction 3. Vortex generator 4. DH-131E acceleration sensor.
[0063] 1. Signal collection: use the acceleration sensor to collect the flow signal of the vibrating flowmeter. The acceleration sensor used in this application is a DH-131E IEPE piezoelectric acceleration sensor with a sensitivity of , the range is , frequency range 0.5 ~ 10KHz. The acceleration sensors are distributed on two symmetrical positions to better reflect the vibration characteristics of the flow signal of the fluid vibrating flowmeter.
[0064] 2. Use the adaptive endpoint continuation method of waveform matching to extend the two ends of the signal. The continuation of the signal includes left continuation and right continuation. The following only takes the left continuation as an example, and the original signal is ;
[0065] 1) OK The maximum and minimum points at the left endpoint are denoted as , , remembe...
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