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High-temperature and high-pressure liquid pressure and temperature measurement sensor based on ceramic package

A pressure sensor and temperature sensor technology, applied in measurement devices, instruments, etc., can solve problems such as affecting measurement accuracy, damaging measurement circuits, and sensitive components not being able to withstand high temperatures, so as to improve measurement accuracy, expand measurement functions, and increase high-pressure resistance. Effect

Inactive Publication Date: 2017-08-04
NORTHWESTERN POLYTECHNICAL UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional pressure sensors can only measure ordinary low-pressure liquids due to the limitation that sensitive components cannot withstand high-pressure shocks, and cannot meet the measurement requirements for high-pressure liquids.
In addition, there are many restrictions on liquid pressure measurement in a high temperature environment. Sensitive components cannot withstand high temperatures and will also damage the measurement circuit.
Moreover, the measured pressure data will also be affected by high temperature, which will affect the measurement accuracy

Method used

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  • High-temperature and high-pressure liquid pressure and temperature measurement sensor based on ceramic package
  • High-temperature and high-pressure liquid pressure and temperature measurement sensor based on ceramic package
  • High-temperature and high-pressure liquid pressure and temperature measurement sensor based on ceramic package

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Embodiment Construction

[0021] Such as figure 2 , image 3 As shown in , the sensitive element of the pressure sensor and the sensitive element of the temperature sensor wrapped by the ceramic shell are contacted with the measured liquid. During the measurement, the measured liquid impacts the lower part of the ceramic shell, bending the lower part of the ceramic shell, driving the metal lower plate to bend, and the metal upper plate Fixed, the distance between the two polar plates is relatively small, and the capacitance value of the sensitive element of the pressure sensor changes, resulting in a change in the resonant frequency of the resonant circuit connected to the measuring instrument. The internal resonant circuit of the measuring instrument is inductively coupled to a frequency sweeping circuit. The pressure data is measured according to the change of frequency. The temperature signal will also be obtained when the sensitive element of the temperature sensor touches the liquid to be measur...

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Abstract

The invention discloses a high-temperature and high-pressure liquid pressure and temperature measurement sensor based on ceramic package. The sensor is mainly composed of a pressure sensor sensitive element comprising a variable capacitor, a temperature sensor sensitive element, a ceramic shell, sensor signal transmission leads, and a related conditioning circuit in a measurement instrument. The pressure and temperature of liquid can be measured by contacting the pressure and temperature sensor sensitive elements wrapped in the ceramic shell with the measured liquid and transmitting signals measured by the sensor sensitive elements to a measurement circuit inside the measurement instrument through the sensor leads. The sensor not only can measure the pressure of liquid, but also can measure the temperature of liquid. The sensor is conductive to the analysis of the influence of liquid temperature on liquid pressure and temperature compensation. The sensor has great advantages compared with the existing sensors which can only measure a single parameter of liquid, and is of high measurement precision.

Description

technical field [0001] The invention provides a sensor capable of simultaneously measuring the pressure and temperature of high-temperature and high-pressure liquids, and the measured pressure and temperature data can be displayed by a measuring instrument, which belongs to the field of electronic measuring devices. Background technique [0002] Traditional pressure sensors can only measure ordinary low-pressure liquids due to the limitation that sensitive components cannot withstand high-pressure shocks, and cannot meet the measurement requirements for high-pressure liquids. In addition, there are many restrictions on the measurement of liquid pressure in a high-temperature environment. Sensitive components cannot withstand high temperatures, and the measurement circuit will also be damaged. Moreover, the measured pressure data will also be affected by high temperature, affecting the measurement accuracy. Contents of the invention [0003] The invention provides a sens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D21/02
CPCG01D21/02
Inventor 陈文会朱雪凯李靖
Owner NORTHWESTERN POLYTECHNICAL UNIV
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