| Flowmeter is one of the important instruments in industrial meterage. By the developing of industrial productions, measuring technology of flow is changing with each passing day, and the requisition for accuration and range of flow measurement becomes higher. The portable intelligent flowmeter introduced in this paper has characteristics as follows: Incorporate measure of liquid level, velocity of flow and flow. Big LCD(Liquid Crystal Display) of Chinese. Accurate real-time clock. Non-volatile memory of data. The communication with the master PC by RS-232. Read and write of flash disk as USB host.According to the request of this subject, the system hardware and software for the slave device, and the communication interface to the master PC are developed. Detailed works are as follows: in order to implement the measurement principle in the system, flow-liquid levelmethod is used;velocity of flow is measured through rotor Kinemometer;water level is surveyedvia RS485 interface and pressure sensor;the C8051F060 chip which is in high performance andintegration, produced by Silicon Laboratories Company as master chip is used to capture and measure the width of impulses, so singals of flow velocity are collected and disposed;the 4×4 matrix keyboard and LCD are used in the part of man-machine interface which are easy to input, legible to read, various to display, comfy to be accepted and plain to show measure and inquiry results;FRAM memory FM3164 is used to carry out the non-volatile memory of data and accurate real-time clock.;SL811HST chip is used as USB host which can read and write flash disk,thereby a kind of adscititious mass storage is accomplished .
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