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Tuning fork type sensing device

A sensing device, tuning fork technology, used in measuring devices, test/calibration devices, lubrication indicating devices, etc., can solve problems such as loss of accuracy of sensing points

Active Publication Date: 2015-03-04
上海凡宜科技电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] patent US2006 / 0053863A1 It explains how to use the diagnosis method to judge the vibration part that is suitable for the drive. This design method does not take into account the influence of different material specific gravity except for the diagnosis of the vibration part. This may be when the tank material changes. Easily loses the accuracy of its sensing point

Method used

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  • Tuning fork type sensing device
  • Tuning fork type sensing device
  • Tuning fork type sensing device

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Experimental program
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Embodiment Construction

[0034] Such as figure 1 and 2 As shown, a tuning fork type sensing device includes a piezoelectric conversion unit 6, a sensing unit 5, a user interface unit 4, an arithmetic processing unit 3, an output unit 2, and a power supply unit 1, and it also includes a pair of tuning fork-shaped vibration oscillators . A body accommodates and withstands the above-mentioned units, and the body includes a body tube 97 and a body upper cover 98; the inside of the body tube 97 is injected with semi-solidified colloid or injected with electronic glue for the piezoelectric conversion unit 6 and the user interface unit 4 , the operation processing unit 3, the output unit 2, and the power supply unit 1 provide heat isolation protection and moisture resistance. The objects that the device can be used to measure are powder, block, liquid, solid-liquid mixture, and slurry.

[0035] The arithmetic processing unit 3 calculates the resonant frequency and voltage intensity of the tuning fork-sha...

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PUM

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Abstract

The invention provides a tuning fork type sensing device, which comprises a double-tuning-fork-shaped oscillator, a sensing unit, a piezoelectric conversion unit, an operation processing unit and a power unit, wherein the piezoelectric conversion unit, the sensing unit, the operation processor and the power unit are sequentially connected with one another to form a loop system; the operation processing unit outputs a first frequency signal to regulate and control the power unit so as to drive the piezoelectric conversion unit; the piezoelectric conversion unit generates a feedback signal via the sensing unit, and the feedback signal is transmitted to the operation processing unit so as to generate a second frequency signal; and the second frequency signal is fed back to regulate and control the power unit to output a third frequency voltage to the piezoelectric conversion unit. A device for automatically adjusting the gain of feedback signals is used, so that the sensitivity and the self-detection capacity of the tuning fork type sensing device are high.

Description

technical field [0001] The invention relates to a tuning fork type sensing device with automatic feedback function. Background technique [0002] The signal attenuation of the existing tuning fork sensing field device is abnormal. Under different installation environments, such as the structure of the tank, the installation thread or flange, the natural frequency or voltage signal of the entire tuning fork sensing device will be affected. The drift of the signal often causes the stability problem of the signal. After the actual installation is completed, especially for different process tank environments, there are tanks with frequent material changes; or the material to be measured has variations in physical properties, such as oils and fats, which will have solid / liquid due to temperature changes The mixing of these materials will cause problems such as viscosity, specific gravity, and solid / liquid interface, which will cause differences in signal type definition settings...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F23/296G01F25/00
Inventor 王圣斌
Owner 上海凡宜科技电子有限公司