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Parameter measuring circuit and method for vibrating wire sensors

A vibrating wire sensor and parameter measurement technology, which is applied in the direction of using electric/magnetic devices to transmit sensing components, etc., can solve problems such as data jitter and affect data accuracy, achieve low power consumption, improve measurement accuracy, and prevent measurement errors Effect

Inactive Publication Date: 2019-02-15
SHANGHAI CONSTRUCTION GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the monitoring process, there is a lot of noise in the frequency data, and the conventional method is used for filtering, and the data has jitter, which affects the data accuracy

Method used

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  • Parameter measuring circuit and method for vibrating wire sensors
  • Parameter measuring circuit and method for vibrating wire sensors
  • Parameter measuring circuit and method for vibrating wire sensors

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Embodiment 1

[0031] Please refer to figure 1 The present embodiment 1 provides a resistance measurement circuit of a vibrating wire sensor, including an operational amplifier 110, and an exciting coil L of a vibrating wire sensor is connected between the output terminal of the operational amplifier 110 and the non-inverting input terminal, wherein the excitation The resistance of the vibrating coil L is R L It means that the first resistor R1 is connected between the non-inverting input terminal of the operational amplifier 110 and the ground GND, the inverting input terminal of the operational amplifier 110 is connected with the first reference voltage signal Vr1, and the output terminal of the operational amplifier 110 A microprocessor 130 is also connected via an analog-to-digital converter 120 . The microprocessor 130 may be a single chip microcomputer (MCU), a digital signal processor (DSP), a complex programmable logic device (CPLD) or a field programmable gate array (FPGA). Where...

Embodiment 2

[0040] Please refer to figure 2 , the second embodiment provides a frequency measurement circuit for a vibrating wire sensor, including a second reference voltage signal Vr2, a low-noise operational amplifier 210 and a comparator 230, the second reference voltage signal Vr2 and the low-noise operational amplifier 210 The exciting coil L of the vibrating wire sensor is connected between the non-inverting input ends, the inverting input end of the low-noise operational amplifier 210 is connected with the third reference voltage signal Vr3, the output end of the low-noise operational amplifier 210 is connected to the A bandpass filter 220 is connected between the non-inverting input terminals of the comparator 230, the fourth reference voltage signal Vr4 is connected to the inverting input terminal of the comparator 230, and the output terminal of the comparator 230 is a vibrating wire sensor The digital level signal of the exciting coil L of the vibrating wire sensor is calcula...

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Abstract

The invention provides a parameter measuring circuit and method for vibrating wire sensors. The parameter measuring circuit includes a resistance measuring circuit. The resistance measuring circuit includes an operational amplifier. An exciting coil of a vibrating wire sensor is connected between the output end and the in-phase input end of the operational amplifier. A first resistor is connectedbetween the in-phase input end of the operational amplifier and the ground GND. The out-of-phase input end of the operational amplifier is connected with a first reference voltage signal. The output end of the operational amplifier is also connected with a microprocessor through an analog-to-digital converter. The measurement accuracy can be improved.

Description

technical field [0001] The invention relates to the technical field of signal acquisition, in particular to a vibrating wire sensor parameter measurement circuit and method. Background technique [0002] With the development of technology, the trend of large-scale and complex buildings is becoming more and more obvious. In order to ensure the rapid development of infrastructure construction and ensure safe production, it is necessary to continuously improve and perfect the safety monitoring technology in the engineering field. At present, vibrating wire sensors are mainly used in engineering to monitor relevant data related to system safety such as pressure, stress, seepage pressure, settlement, and tension. In the known technology in this field, the main parameters collected by the vibrating wire sensor signal are the resistance signal and the frequency signal, and the pressure, stress, osmotic pressure, settlement, tension, etc. that are related to the safety of the system...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/16
CPCG01D5/16
Inventor 沈志勇程廷果况中华李鑫奎
Owner SHANGHAI CONSTRUCTION GROUP
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