Four-electrode conductivity adjustable temperature sensor

A temperature sensor, four-electrode technology, applied in thermometers, thermometer parts, thermometers using directly heat-sensitive electrical/magnetic components, etc., can solve problems such as measurement deviation of thermal components

Inactive Publication Date: 2020-08-04
德州尧鼎光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the production process of the temperature sensor, the above factors will cause the measurement deviation of the thermal element in the process of sensing the temperature

Method used

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  • Four-electrode conductivity adjustable temperature sensor
  • Four-electrode conductivity adjustable temperature sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] figure 1 It is a structural diagram of the four-electrode conductance adjustable temperature sensor involved in the present invention. The main structure of the temperature sensor involved in this embodiment includes a wire 1, an electrically insulating rubber fixing rod 2, an electrically insulating rubber gasket 3, two current electrodes 4, two threaded housings 5 ​​and 8, with a known conductivity (or resistance) ) Liquid 6, adjustable screw 7, electrically insulated inner wall 9, adjusting rod 10, two voltage electrodes 11.

[0013] The current electrode 4 is fixed on the left side of the housing 5 by an electrically insulating rubber fixing rod 2 and is led out by a wire 1. The right current electrode 4 located in the housing 8 is fixed on the adjusting rod 10 by an electrically insulating rubber fixing rod 2 and is led out of the housing by a wire 1. The housing 5 and the housing 8 are assembled and connected by an adjustable screw 7. There is a voltage electrode 1...

Embodiment 2

[0015] Such as figure 2 It is a schematic diagram of the automatic adjustment of a four-electrode conductance adjustable temperature sensor. The adjusting rod 10 is connected to the linear fine-tuning device 12 and is driven by the fine-tuning device, so that the adjusting rod is translated inside and outside the housing, so as to adjust the thread pitch of the screw 7 to make The resistance value is accurately adjustable. In addition to fixing electrodes and wires, the electrically insulating rubber fixing rod 2 and the electrically insulating rubber gasket 3 also have the function of absorbing external pressure and vibration, and protecting the electrodes from deformation due to external pressure. The conductive liquid 6 and the rubber ring 3 ensure that the liquid conductance between the two electrodes is not affected by external pressure, but is only related to temperature. A constant current source current is applied between the two electrodes, and the voltage drop betwe...

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PUM

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Abstract

The invention discloses a four-electrode conductivity adjustable temperature sensor. A main structure of the four-electrode conductivity adjustable temperature sensor comprises two shells which are detachably assembled, wherein the shells are filled with a liquid with known conductivity (or resistivity), a rubber gasket, an adjusting rod, two pairs of electrodes and a wire. Relative positions of the two shells are adjusted through screws so that a distance between two voltage electrodes is changed, corresponding voltage drop is changed too, conductivity is adjustable, and high consistency between batches of the temperature sensors and high accuracy of a conductivity value are obtained. Compared with an existing temperature sensor, the temperature sensor is not affected by external and selfstresses, avoids temperature measurement errors caused by the stresses, avoids measurement errors caused by electrode polarization, enables temperature measurement to be more accurate, and is simplein structure, small in size, high in precision, good in long-term stability, good in integration, high in batch consistency and so on.

Description

Technical field [0001] The invention specifically relates to the design and manufacture of a four-electrode temperature sensor with adjustable conductance. The temperature measurement is performed by the characteristic that the conductivity of the liquid changes with temperature. The distance between the two voltage electrodes and the current electrode of the conductivity cell is fine-tuned to achieve high-accuracy calibration of the thermometer and achieve high batch consistency. Background technique [0002] In physics, temperature is a basic physical quantity, and its role is both important and special. In the field of metrology, thermometry is an important branch. In people's daily life, medical and health, industrial and agricultural production, scientific research and many other fields, accurate temperature measurement is required. All walks of life are inseparable from accurate temperature measurement, and the accuracy of temperature measurement is related to many facto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K1/12G01K7/28
CPCG01K1/12G01K7/28
Inventor 吴锜刘海玲高莉媛赵珊珊王字旁
Owner 德州尧鼎光电科技有限公司
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