Bandstop filter-type digital strain-type torque sensor based on signal conversion

A torque sensor and band-stop filtering technology, applied in the sensor field, can solve the problems of electrostatic interference, difficult operation, unfavorable long-distance transmission, etc., and achieve the effects of good applicability, convenient calibration, and signal processing time saving.

Inactive Publication Date: 2015-12-02
CHENGDU CHENGBANG POWER TEST INSTR
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the use of analog signals has the following defects, one: it is not conducive to the environment of strong electromagnetic interference and long-distance transmission, and it will bring static interference when the human body is in contact, making it difficult to operate

Method used

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  • Bandstop filter-type digital strain-type torque sensor based on signal conversion
  • Bandstop filter-type digital strain-type torque sensor based on signal conversion
  • Bandstop filter-type digital strain-type torque sensor based on signal conversion

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Embodiment

[0023] Such as figure 1 As shown, the digital strain gauge torque sensor based on the band-stop filter circuit of the present invention is composed of a gear plate U, a photoelectric switch S, a stator system, a resolver T1, a resolver T2, and a rotor system. The toothed disk U is fixed on the rotor of the sensor, and one end of the photoelectric switch S is connected with the toothed disk U, and the other end is connected with the stator system. At the same time, the primary side of the resolver T1 is connected to the stator system, and its secondary side is connected to the rotor system. The primary side of the resolver T2 is connected to the rotor system, and its secondary side is connected to the stator system. The photoelectric switch S cooperates with the gear plate U to detect the speed of the rotor rotation, and outputs a corresponding frequency pulse signal to the stator system.

[0024] In order to better process the frequency pulse signal sent by the photoelectric ...

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Abstract

The invention discloses a bandstop filter-type digital strain-type torque sensor based on signal conversion, which is characterized by comprising a dentate disc U, a photoelectric switch S, a stator system, a rotating transformer T1, a rotating transformer T2 and a rotor system, wherein the rotor system comprises a rectifier K, a strain resistance bridge, a signal conversion unit, a bandstop filter unit and a signal amplifier P2; and the stator system comprises a DC/DC unit, a power amplifier P1, an ARM microcontroller, an RS485 communication interface, a signal conversion circuit, and a rotation speed signal conditioning unit. Through effects of the bandstop filter unit, interference signals can be filtered, and the interference signals can be prevented from influencing pulse signals. In addition, the signal conversion efficiency is high, and the signal processing time can be saved by 20% than that of the traditional strain-type torque sensor.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a band-stop filtering digital strain gauge torque sensor based on signal conversion. Background technique [0002] In the existing strain gauge torque sensor technology, an analog circuit is usually used to process the electrical signal output by the strain gauge, and convert it into a proportional linear analog output signal, such as voltage, current or frequency pulse signal. However, the use of analog signals has the following defects. First, it is not conducive to the environment of strong electromagnetic interference and long-distance transmission, and it will bring static interference when the human body is in contact, making it difficult to operate. Second: It is necessary to adjust the parameters of the circuit during calibration, calibration and parameter adjustment. Third: The analog signal needs to be processed by a secondary instrument before it can be connected to a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L3/00
Inventor 程社林刘陈程振寰杨忠敏
Owner CHENGDU CHENGBANG POWER TEST INSTR
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