Intelligent electromagnetic flowmeter scale hardware anti-jamming technology

Abstract: the intelligent electromagnetic flowmeter scale hardware anti-jamming technology information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. 1, new excitation technology is important means to improve the anti-jamming ability of the intelligent electromagnetic flowmeter development of electromagnetic flowmeter excitation technology, not only weaken the electrode polarization potential, mud interference, the effects of flow noise, and can change the shape of the power frequency interference, facilitate the synchronization. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the intelligent electromagnetic flowmeter scale hardware anti-jamming technology article details. 1, new excitation technology is important means to improve the anti-jamming ability of the intelligent electromagnetic flowmeter development of electromagnetic flowmeter excitation technology, not only weaken the electrode polarization potential, mud interference, the effects of flow noise, and can change the shape of the power frequency interference, facilitate synchronous sampling technology institute of frequency interference noise, in order to avoid the influence of power frequency interference. Current electromagnetic flow sensor using low frequency rectangle excitation frequency synchronization three values and double frequency rectangular wave excitation, the anti-interference ability to improve the electromagnetic flowmeter, improving the measuring accuracy and reliability of electromagnetic flowmeter. 2, preamplifier, the first step of the design is to improve the anti-interference ability of electromagnetic flow sensor output current signal is very weak, the impedance is higher, so the high input impedance, low drift, low noise, high CRMM preamplifier can meet the requirements of in-phase common-mode interference. Preamplifier using jfets high input impedance, voltage buffer subtracter low drift, low noise, precise resistance carefully matching of instrument amplifier, and USES the input protection technology, common mode voltage bootstrap technology and grounding technology greatly improve the ability of common mode interference, inhibit the effect of zero drift. 3, synchronous sampling frequency compensation technology of synchronous sampling and monitoring of power frequency power frequency compensation technology, is to improve the resistance to flow into signal voltage of power frequency interference and power frequency power frequency fluctuations of the effective methods to generate power frequency interference ability. Synchronous sampling technology, the sampling pulse width for the integer times of power frequency cycle, make the average potential zhonggong frequency interference 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 source and sampling pulse synchronous adjustment, realize synchronous sampling technology and synchronous excitation technology, synchronous A/D conversion, in order to reduce the influence of power frequency interference. 4, using new HCMOS series chip technology USES 74 hc series chip technology is relatively low noise by using the 74 ls series chip tolerance improve 2. 4 times, tolerance to improve 2 high and dry. 1 times, the intelligent electromagnetic flowmeter hardware adopts 74 hc series chips, not only reduce the power consumption of the whole, and improve the anti-jamming ability of the component itself, which laid a foundation for the power meter small lightweight integration. 5, the microprocessor system supply voltage monitoring technology in intelligent electromagnetic flowmeter microprocessor system when power transient voltage, pulse excitation switch action will cause the microprocessor misoperation, the phenomenon such as loss of data, so must use reliable reset circuit and power supply voltage monitoring technology. Zui is simple and practical method with low cost power supply voltage monitor with high sensitivity, improve the microprocessor system and anti-jamming ability. As shown in figure 4 microprocessor voltage monitor, which USES TL7705CP supply voltage monitor chip, a power supply, electric, power supply instantaneous undervoltage can produce reliable reset signal. Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.

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