Intelligent piezoelectric vibration temperature composite sensor based on network serial communication

Abstract

The invention discloses an intelligent piezoelectric vibration temperature composite sensor based on network serial communication. The composite sensor comprises a sensor shell, two 8PIN connectors, a main control circuit board assembly, a shielding structure assembly, a vibration sensor assembly, and a temperature sensor assembly. The vibration sensor assembly and the temperature sensor assembly are respectively provided with a digital output module with a Butterworth intelligent low-pass filter. According to the invention, single-line wiring can be realized, wiring is simple, and cables are convenient to install and distinguish; and moreover, the wiring space is small, independent wiring is facilitated, the shielding structure assembly can reduce an external equipment noise and interference of an electromagnetic field, and the Butterworth intelligent low-pass filter can remove high-frequency interference, reduce the noise and prevent high-frequency interference, caused by influence of other circuits or equipment, on output signals of the sensor. Therefore, the accuracy of the sensor is improved.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to an intelligent piezoelectric vibration temperature composite sensor based on network serial communication. Background technique [0002] The sensor 100 is a test instrument for collecting physical characteristics such as vibration and temperature, and converting them into electrical signals for measurement. [0003] In existing applications, the sensors 100 used in domestic rail transit (high-speed rail, bullet train, subway, light rail, etc.) to monitor the vibration state and temperature state of axle boxes, gearboxes, and traction motors are only a single product connected to the back-end acquisition system 200, And the installation cable wiring must be one-to-one, and the 200 terminals of the collection system are scattered in a tree form. The specific wiring method is as follows: figure 1 shown. [0004] In this way, the wiring of the sensor 100 in the car body is very mes...

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Problems solved by technology

[0004] In this way, the wiring of the sensor 100 in the car body is very messy, which causes serious inconvenience to the installation and identification of cables; and, the existing products are all analog signal output, and the output of the sensor 100 is often caused by the influence of other circuits or equipment running on the car body. The signal is subject to high frequency interference, affecting the accuracy of the sensor 100

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