Hall-type power-driven float-bowl liquid level transmitter

Abstract

The invention discloses a Hall-type power-driven float-bowl liquid level transmitter. The Hall-type power-driven float-bowl liquid level transmitter comprises a measurement sensor, a transmitter body and accessory circuits. When a measured liquid level changes, the variable quantity of the liquid level is transformed into a corresponding Hall voltage signal through a float bowl, a torque pipe system and a Hall sensor system in the measurement sensor, the signal is transmitted to the transmitter body so that sampling and data processing can be carried out, and finally the signal is transmitted to an upper computer in bus signal modes like 4-20mA and HART. The accessory circuits can comprise a liquid crystal and key circuit and the like. According to the technical scheme, defects like mechanical wear, low precision and short structural-member service life of a traditional power-driven float-bowl liquid level transmitter are overcome, and defects like non-linear measurement, large power consumption, complex calculation and low precision of a current Hall-type power-driven float-bowl liquid level transmitter are also overcome. Linear, continuous and non-contact measurement of the power-driven float-bowl liquid level transmitter is achieved, and high-precision feedback transmission of liquid level measurement data can also be achieved.

Description

technical field [0001] The invention relates to the fields of electronic technology, sensor technology and detection technology, and more specifically, relates to a Hall-type electric float liquid level transmitter. [0002] Background technique [0003] Level measurement is one of the important contents in the field of detection and control technology. Among them, liquid level measuring devices are widely used in industrial production, especially in the field of process control engineering. The working principle of the liquid level measuring device is mainly: when the liquid level changes, the sensitive element in the liquid level sensor will generate a corresponding electrical signal output, and the real-time sampling and data processing of the signal can obtain the current liquid level change. Altitude value; the processed liquid level data can be transmitted to the host computer through the feedback circuit. An electric displacer level transmitter is a common liquid l...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a linear measuring device for a Hall-type electric float level transmitter, which can not only overcome the large mechanical wear, serious mechanical hysteresis, and easy It is affected by external vibration, low measurement accuracy, and low structural life, and can overcome the excessive power consumption, discontinuous measurement or Due to the use of non-linear measurement principles, the calculation method is complicated, the calculation accuracy is low, the calculation time is too long, and there are system errors; the invention realizes the linear, continuous and non-contact detection of the electric float level transmitter and the displacement data. High precision feedback transmission

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