Intelligent bus eddy current displacement sensor with integrated structure

Abstract

The invention discloses an intelligent bus eddy current displacement sensor with an integrated structure. The intelligent bus eddy current displacement sensor with integrated structure is characterized in that an intelligent bus module and a signal conditioning circuit board are arranged in a housing; two sides of the housing are each provided with an electric connector which is in network connection with a bus; a conductive rubber electromagnetic shielding cover with a built-in sensor probe is arranged between the housing and a detection board; the sensor probe is connected with the signal conditioning circuit board; a power supply module installed on the intelligent bus module in an integrated way is in tapping connection with the signal conditioning circuit board, an A / D conversion chip, the sensor probe, a temperature sensor, a DSP operation module and a CAN bus transceiver; the signal conditioning circuit board is connected with the sensor probe and the A / D conversion chip; the CAN bus transceiver is connected with the DSP operation module and the electric connectors; and the DSP operation module is connected with the temperature sensor. The intelligent bus eddy current displacement sensor with an integrated structure has functions of on-line temperature drift compensation, non-linear error correction, electromagnetic shielding protection, outputting of digital signals, fault self diagnosis and the like, and has the advantages of being high in the integration degree, the measuring accuracy, the intelligent degree, the anti-interference capability and the adaptability.

Description

technical field [0001] The invention relates to the technical field of sensor measurement, in particular to an integrated structure intelligent bus eddy current displacement sensor. Background technique [0002] The displacement signal is mainly used to reflect the displacement change of the measured object relative to the reference datum plane, and can also be used to reflect the low-frequency vibration of mechanical equipment. Displacement measurement is widely used in industrial and civil fields, and it is a relatively common measurement method. [0003] Displacement sensors can usually be divided into two types: contact type and non-contact type according to different working methods. Contact displacement sensors include inductive displacement sensors, pull rope displacement sensors, etc., which have the advantages of simple structure and high cost performance, but the disadvantages are short working life and measurement accuracy easily affected by factors such as oil p...

AI Technical Summary

Problems solved by technology

[0004] General commercial eddy current displacement sensors are usually mainly composed of probes, front-end devices, radio frequency connection cables and other components. There is a lack of interchangeability between them; the use process is relatively cumbersome, and it is usually necessary to set the characteristic slope and intercept parameters of the sensor to perform displacement measurement. The sensor does not have intelligent functions such as online nonlinear error correction and fault self-diagnosis; due to the analog output of the probe The signal is relatively weak, and the length of the RF connection cable between the measurement site probe and the front-end device is usually required to be less than 15m, and the measurement signal is susceptible to interference during long-distance transmission; the separate sensor structure is not conducive to the impact protection of the sensor, and cannot be applied to The harsh working environment also makes the installation and maintenance more complicated in engineering applications

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