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本文介绍一种新的信号处理方法,用于小激磁功率、宽量程、动态响应好、高精度、智能化的高性能电磁流量计。该方法可以充分提高激磁频率来改善动态响应和保证零点稳定,并可对微小流量进行测试。一、电磁流量计的整体关系分析对于电磁流量计的整体性能,如果从其输入输出的信号考虑,主要是激磁与信号处理以及电功率的关系。目前,新一代的电磁流量计普遍使用正负方波激磁的形式。正负方波激磁的主要参数为激磁频率和激磁电流。在一般电磁流量计技术中,若激磁频率高,能使其动态响应快和流体噪声影响减小,但零点不稳定。反之,激磁频率低时,零点较稳定,而响应迟钝和对流体噪声敏感。
This article describes a new signal processing method for small excitation power, wide range, good dynamic response, high precision, intelligent high performance electromagnetic flowmeter. The method can fully improve the excitation frequency to improve the dynamic response and to ensure zero stability, and can test the small flow. First, the overall relationship between electromagnetic flowmeter analysis For the overall performance of the electromagnetic flowmeter, if the input and output signals from its consideration, the main excitation and signal processing and electric power relationship. At present, a new generation of electromagnetic flowmeter commonly used in the form of positive and negative square wave excitation. The main parameters of positive and negative square wave excitation are excitation frequency and excitation current. In general electromagnetic flowmeter technology, if the excitation frequency is high, it can make the dynamic response fast and reduce the influence of fluid noise, but the zero point is not stable. Conversely, when the excitation frequency is low, the zero is more stable, and the response is slow and sensitive to fluid noise.