Electromagnetic flow meter scale anti-interference tips

Abstract: the electromagnetic flow meter scale by excellent anti-interference tips information flow meter, flow meter production factory to provide you with quotation. Sensors for converter of the traffic signal electrode, the potential difference between a voltage signal. In actual measurement, such as electromagnetic induction, electrostatic induction and electrochemical potential reasons, the resulting voltage applied to the electrode not only is proportional to the velocity. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the electromagnetic flowmeter scale anti-interference tips article details. Sensors for converter of the traffic signal electrode, the potential difference between a voltage signal. In actual measurement, the electromagnetic induction and electrostatic induction and electrochemical potential, the electrode of voltage is proportional to the velocity of electromotive force, not only also contains elements of all kinds of interference. 1, differential interference, and tend to exist in eliminate power frequency interference signal and power frequency interference signals, differential interference in the signal processing circuit of the low-pass filter it is often difficult to completely filter out the power frequency interference. The company USES the synchronous sampling and power frequency compensation technology, to suppress potential traffic signal in the mixed with power frequency interference and power frequency power frequency wave power frequency interference, and in addition to the differential interference effectively. Synchronous sampling technology, sampling start time lag excitation signal 1/4 cycle, it adopts the pulse width of an even number of times the power frequency cycle, eliminate differential interference average potential zhonggong frequency interference at the same time make the traffic signal is equal to zero, in order to eliminate the influence of power frequency interference; Compensation is to ensure that the frequency of the power frequency power supply fluctuation frequency of the dynamic wave, the excitation power supply and the sampling pulse synchronous adjustment, realize synchronous sampling technology and synchronous excitation technology, synchronous A/D conversion, reduce the influence of differential interference and power frequency interference. 2, remove the so-called zero drift, zero drift is when the input signal of the sensor is zero, the output of the amplifier is not zero. Zero drift signal will pass between the levels of amplification circuit, after multiple amplification, signal on the output side become larger, as a result of the sensor output signal is weak, zero drift can drown the useful signal and make circuit cannot work normally. So in order to suppress zero drift and adopts three op-amp input differential circuit, realize the internal resistance of weak signal acquisition, to suppress the introduction of the common mode signal. Level by blocking capacitor after amplifying circuit, filter the baseline drift, prevent dc signal is too large, is beyond the scope of A/D transformation input. 3, other measures to remove the interference from electromagnetic flowmeter sensors for the & other; The transformer effect & throughout; Produced by the orthogonal interference, using & other; Transmitter zero method & throughout; To get rid of. Software design, the use of digital filtering technology and power-fail protection technology, instruction redundancy, software measures, can effectively improve the reliability of the microprocessor digital input. Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.

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