Electromagnetic flowmeter has the characteristics of high measurement accuracy, good repeatability and wide range ratio, and has been widely used in the field of industrial measurement. However, due to the wide measurement range and wide linearity of the electromagnetic flowmeter, the power consumption is relatively large. In the industrial field, some of the electromagnetic flowmeters powered by 220VAC cannot be used when there is no power supply. Jiangsu Jinhu Xudong Instrument Factory produces The XDL-DC-D battery-powered electromagnetic flowmeter is different from the AC-powered electromagnetic flowmeter in hardware and software design. In the hardware design, the high-performance integrated circuits and advanced design ideas are mainly used in the amplifier circuit. The weak signal amplification and A / D conversion methods under strong interference are studied. It adopts high-precision double-integral analog-to-digital conversion, which can effectively eliminate various spikes and AC power frequency interference. The excitation method adopts a three-valued low-frequency rectangular square wave with good zero-point stability and strong resistance to power frequency interference. Since it is a periodic intermittent operation, the excitation power consumption is greatly reduced. For the core component MCU, the PIC16F877 8-bit microprocessor with low power consumption and powerful function produced by MICROCHIP is adopted. In the software design, the single-chip microcomputer works in the power-saving mode. After each signal acquisition, calculation, and display processing, it waits for an interrupt to wake up and then performs the next measurement process. The pulse signal output by the single-chip microcomputer is used to control the analog switch, and the operation of each switch in the power supply and the hardware circuit is switched over time, so that the power consumption of the measurement circuit is minimized. The XDL-DC-D battery-powered electromagnetic flowmeter of Jiangsu Jinhu Xudong Instrument Factory adopts imported circuit boards, which greatly reduces energy consumption and greatly extends the battery life. For customers who are worried about insufficient battery life during use Concern, Jiangsu Jinhu Xudong Instrument Factory promised a battery warranty for three years.
For the application range of battery-powered electromagnetic flowmeters, due to battery-powered electromagnetic flowmeters (XDL-DC-D electromagnetic water meters), the measurement medium requires a Reynolds number RE of less than 2400, and the measurement effect is ideal. At present, Xudong battery-powered electromagnetic flowmeters It has been widely used in the process of industrial water supply. The battery-powered electromagnetic flowmeter is used. Since the battery is encapsulated in the meter body, as long as the customer is not maliciously damaged, the flowmeter will not be powered off, so that you can record more accurately The water consumption status of water-consuming enterprises is far away from the enterprise, and people go to places where it is more difficult to inspect. You can add a source GPRS to monitor and upload the data of this flowmeter in real time, which can effectively prevent the water-using enterprise from stealing water or In the case of intentional power outage, the battery-powered electromagnetic flowmeter produced by Jiangsu Jinhu Xudong Instrument Factory has been well used in many cities in China. Xudong battery-powered electromagnetic flowmeter has been subjected to the operation of the water supply company. A high praise.
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