Ultrasonic sensor for flow meter

█ Introduction

Ultrasonic flow meter is a "speed difference method" for the principle to measure the liquid flow in tube. It uses advanced multi-pulse technology, digital signal processing and error correction technology. The flow meter can adapt to the industrial field environments, measurement more convenient, economical and accurate.

█ The principle of ultrasonic flow meter

Ultrasonic flow meter is assembled by the ultrasonic transducer, electronic circuit and flow display and the cumulative system of three parts. Ultrasonic transmitter transducer converts electrical energy into ultrasonic energy, and launched into the measured fluid. Receiver receives the ultrasonic signals. It’s amplified by the electronic circuit and converted to electrical signals representative of the supply flow rate and totalize display instrument for display and totalize. This way is to realize the flow detection and display.

Based detection methods can be divided into velocity difference method, Doppler method, beam offset method, the noise law and related laws, such as different types of ultrasonic flow meter. Over the last decade with the rapid development of integrated circuit technology, ultrasonic flow meter is a kind of started applications.

Measurement of direct propagation time

█ The example of pulse transmitting circuit

The example of pulse transmitting circuit

█ The applications of ultrasonic flow meter

As the ultrasonic flow meter can be used as non-contact measurement, no measurement of flow obstruction, no pressure loss, measurable non-conductive liquid, etc., it’s widely used in plant effluent monitoring, cementing slurry flow measurement, oily waste water flow measurement, oil Note water flow measurement, water flow measurement, industrial circulating water flow measurement, process water consumption measurement, mineral slurry flow measurement, flow measurement ore slurry, sodium aluminate and other process-flow measurement and control, cooling circulating water flow measurement, turbine cooling coil water flow measurement, flow measurement and other aspects of milk etc.