Two-wire contact electronic material level meter

Abstract

The invention discloses a two-wire system contact type electronic level meter. Two inlet wires J1 and J2 are respectively connected to a bridge rectifier BD1, an output of the bridge rectifier BD1 is connected to an electric energy storage electronic module (2), the electric energy storage electronic module outputs a stabilized power supply VCC1, and the stabilized power supply VCC1 supplies a central controller electronic module (1) and a high frequency generator electronic module (3) with power. The central controller electronic module is connected with the high frequency generator electronic module, output signals of a sensor electronic module (4) are received by the central controller electronic module, the electric energy storage electronic module is controlled by an output of the central controller electronic module via an operating mode converter (5), and signals are output to a remote central control room via the two inlet wires. An output of the high frequency generator electronic module is connected to an input terminal of an isolation transformer, and an output voltage V2 of the isolation transformer is connected with the sensor electronic module. The sensor electronic module comprises a detection sensor, the detection sensor detects the material level or liquid level and then outputs signals, and the signals are processed by the sensor electronic module and then output to the central controller electronic module.

Description

technical field [0001] The invention relates to an electronic material level gauge, in particular to a two-wire contact type electronic material level gauge. Background technique [0002] There are two types of level gauges currently on the market, contact and non-contact. Contact level gauges are divided into mercury type, resistance rotation type, capacitive type, permanent magnet type, hammer type and other types; non-contact level gauges are further divided into ultrasonic, radar, laser and other types. Various level meters have their own advantages and disadvantages according to different application environments and different substances to be measured. When the mercury-type material level gauge is used in fine ore materials, there are failures such as the buried hammer not alarming and the hammer breaking. The resistance-rotary level gauge has poor accuracy and is not durable. Capacitive level sensors have poor reliability. Heavy hammer type has broken hammer, buri...

AI Technical Summary

Problems solved by technology

[0003] Due to the harsh use environment, the shape, temperature, dust, medium concentration, signal interference and other factors of the measured substance will affect the accuracy and effect of the detection, and even production accidents will affect the normal production order.

Therefore, it is particularly important for the user to select a suitable level sensor according to the environment and occasion of use, so as to improve the detection accuracy and effect, otherwise it will affect production and increase costs

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