Flow detection method and system for low energy consumption ultrasonic flowmeter

Abstract

The invention belongs to the technical field of ultrasonic flow meter design, and particularly relates to a flow detection method for a low-energy ultrasonic flow meter and a system for realizing the method. The method includes the following steps: a main control module generates a continuous excitation signal with a period of T, And output to the control circuit of the number of excitation signals; the control circuit of the number of excitation signals processes the excitation signal of the continuous cycle into the excitation signal of the specified number of cycles, and the specified cycle is greater than or equal to 6; the first transducer receives the number of specified cycles After receiving the excitation signal, the second transducer outputs the echo signal to the timing circuit in the echo signal processing module for timing and outputs the result to the main control module. , Countercurrent output timing difference calculation flow. By processing the continuous excitation signal into an excitation signal with a specified number of cycles, the first transducer will not always be in the working state, reducing energy loss and prolonging the service life of the system.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic flow meter design, and in particular relates to a flow detection method and system for a low energy consumption ultrasonic flow meter. Background technique [0002] Ultrasonic flow meter is a device that uses the principle of ultrasonic time difference to measure the flow of liquid or gas. Compared with traditional mechanical meters, ultrasonic flow meters have low starting flow, high measurement accuracy, and small pressure loss. It is precisely because of these excellent characteristics that ultrasonic flowmeters are widely used in petroleum, chemical industry, metallurgy, electric power, water supply and drainage and other fields. [0003] The measurement principle of the ultrasonic flowmeter is: the upstream transducer sends out an ultrasonic signal, which is received by the downstream transducer after time t1; the downstream transducer sends out an ultrasonic signal, which is received by t...

AI Technical Summary

Problems solved by technology

In the prior art, the excitation signal used to excite the transducer is mostly a continuous signal, but since only the time of downstream or upstream is collected, the part after the continuous signal is basically not used, and the continuous excitation wave signal will cause the transducer The continuous vibration of the energy device leads to excessive energy loss of the system, requiring frequent battery replacement of the ultrasonic flowmeter, which is inconvenient to use

In addition, the continuous excitation signal will also generate interference waveforms on the pipe wall or other parts, which will affect the measurement accuracy of the ultrasonic flowmeter

Images