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An excitation circuit and measurement circuit of a single-coil vibrating wire sensor

A technology of vibrating wire sensor and exciting circuit, which is applied in the direction of measuring the frequency change force of the stressed vibrating element, etc., can solve the problems of single coil vibrating wire sensor, such as the reduction of oscillation amplitude and the inability to continuously oscillate, and achieve continuous Measuring, Improving Accuracy, and Timeliness Effects

Active Publication Date: 2021-03-26
常州兴启电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to aim at the technical problem that the vibration amplitude of the single-coil vibrating wire sensor in the prior art mentioned in the background technology will gradually decrease with the discharge of the capacitor, and cannot continuously oscillate

Method used

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  • An excitation circuit and measurement circuit of a single-coil vibrating wire sensor
  • An excitation circuit and measurement circuit of a single-coil vibrating wire sensor
  • An excitation circuit and measurement circuit of a single-coil vibrating wire sensor

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Embodiment 1

[0038] Such as figure 1 as shown, figure 1 It shows a functional block diagram of an excitation circuit of a single-coil vibrating wire sensor provided by an embodiment of the present invention, including a single-coil vibrating wire sensor, an oscillating circuit and a feedback circuit, wherein the oscillating circuit is connected to the single-coil vibrating wire sensor, The initiating circuit provides an initiating signal for the single-coil vibrating wire sensor, the feedback circuit is connected to the initiating circuit, the feedback circuit amplifies the output signal of the initiating circuit, the feedback circuit is connected to the single-coil vibrating wire sensor, and the output signal of the initiating circuit is amplified and then output For the single-coil vibrating wire sensor, when the initiating circuit is not working, the feedback circuit continues to provide an oscillation signal for the single-coil vibrating wire sensor, ensuring that the oscillation ampli...

Embodiment 2

[0049] Such as Figure 4 as shown, Figure 4 It shows a functional block diagram of a measurement circuit of a single-coil vibrating wire sensor provided by an embodiment of the present invention, including an excitation circuit and a signal processing circuit of a single-coil vibrating wire sensor in Embodiment 1, and the signal processing circuit is connected to the single coil For the vibrating wire sensor, the signal processing circuit is used to detect the output signal of the single-coil vibrating wire sensor, rectify and filter, amplify and output to the processor.

[0050] Such as Figure 4 As shown, the signal processing circuit includes a rectification filter circuit and an amplification circuit. The rectifying and filtering circuit is connected with the single-coil vibrating wire sensor, and the input end of the amplifying circuit is connected with the output end of the rectifying and filtering circuit.

[0051] Such as Figure 5 As shown, the rectification and ...

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Abstract

The invention discloses a shock excitation circuit of a unicoil vibration wire sensor. The shock excitation circuit comprises the unicoil vibration wire sensor, a vibration starting circuit and a feedback circuit. The invention discloses a measurement circuit of the unicoil vibration wire sensor. The measurement circuit comprises the shock excitation circuit of the unicoil vibration wire sensor and a signal processing circuit. Advantages are provided that by using the shock excitation circuit of the unicoil vibration wire sensor and the measurement circuit thereof, the vibration amplitude of the unicoil vibration wire sensor is invariable and can be continuously measured, and the accuracy and timeliness of the test result are improved.

Description

technical field [0001] The invention relates to the measurement field of a vibrating wire sensor, in particular to an excitation circuit of a single-coil vibrating wire sensor. Background technique [0002] The vibrating wire sensor is based on the working principle that the natural frequency of the steel string changes with the change of the tension. According to the electromagnetic induction principle of the current and voltage generated by the wire cutting magnetic force line, the output frequency measurement signal is obtained. It has a simple structure, high precision, and strong anti-interference ability. It is suitable for long-term The characteristics of distance transmission are widely used in safety monitoring of dams, bridges, subways, coal mines, foundation pits and other projects. [0003] Vibrating wire sensors are generally divided into single-coil vibrating wire sensors and double-coil vibrating wire sensors. The present invention relates primarily to single...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/10
CPCG01L1/10
Inventor 李芳苑
Owner 常州兴启电子科技有限公司