Sensor structure used for Doppler flow instrument and assembly method thereof

Abstract

The invention relates to a sensor structure used for a Doppler flow instrument and an assembly method thereof, pertaining to the technical field of flow measurement of industrial fluids. The technical scheme is characterized in that an upper twisted pair (7) at the end part of a signal cable (5) is connected with a Doppler resonance wafer (3); the signal cable (5) and a shielding net (6) are locked into a main housing (1) through a locker (4) such that the shielding net (6) of the signal cable and the main housing (1) form an equipotential metal cavity structure; the cavity structure of the main housing (1) is filled with soft silica gel by pouring through a gluing screw opening hole (9) and filled by 2 / 3; and a Doppler resonance wafer of a transmitting transducer is a piezoelectric ceramic wafer P-8 series and a Doppler resonance wafer of a receiving transducer is a piezoelectric ceramic wafer P-5 series. The sensor structure used for the Doppler flow instrument and the assembly method thereof have following beneficial effects: production cost is low; promotion is easily carried out; a sensor can be used in a complex environment; and by improving sensitivity, stable operation of the sensor is ensured.

Description

technical field [0001] The invention relates to a sensor structure for a Doppler flow meter and an assembly method thereof, which are used for improving sensitivity in fluid measurement of industrial two-phase flow or multiphase flow, and belong to the technical field of flow measurement of industrial fluid. Background technique [0002] In the fluid measurement of industrial two-phase flow or multi-phase flow, such as: power plants, sewage treatment plants, etc., it is often necessary to install ultrasonic flow monitoring systems online without stopping production and water; however, most ultrasonic monitoring systems on the market are Transit-time-difference ultrasonic flowmeters that measure a single pure medium are difficult to meet the requirements due to the multi-phase flow characteristics of the fluid. The Doppler flow meter is suitable for non-stop production and water, and online installation. However, most of the Doppler flow sensors in the background art generall...

AI Technical Summary

Problems solved by technology

Due to the influence of many of the above factors on site, the measurement accuracy of the Doppler flow sensor is affected, and the flow monitoring system often malfunctions during the commissioning and production process.

If the parameters of the Doppler flow sensor are not properly selected, many problems such as pipe blockage and motor stoppage are prone to occur during the transportation of fluid slurry, which will bring certain losses to on-site production.

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