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A Multifunctional Clamping Device for Calibration of Thin Film Thermocouple Sensors

A technology of thermocouple sensor and clamping device, which is applied to measuring devices, instruments, measuring heat, etc., to achieve the effects of improving reliability, reducing thermoelectric potential loss, and accurate and reliable calibration results

Active Publication Date: 2021-07-23
DALIAN JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The device of the present invention has the advantages of convenient installation, simple structure, separation of hot and cold ends of thermocouples, stable clamping of thermocouple lead wires, etc., and can solve various measurement problems existing in the calibration process of sheet-shaped film thermocouples

Method used

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  • A Multifunctional Clamping Device for Calibration of Thin Film Thermocouple Sensors
  • A Multifunctional Clamping Device for Calibration of Thin Film Thermocouple Sensors
  • A Multifunctional Clamping Device for Calibration of Thin Film Thermocouple Sensors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Clamping and positioning of sheet thin film thermocouple sensor:

[0046] Such as Figure 8 As shown, the sheet-shaped thin-film thermocouple sensor 6 is mainly composed of a hot junction 6-1 (temperature measuring end / hot end), a thin-film thermal electrode 1 6-2, a thin-film thermal electrode 2 6-3, a cold junction (compensation end / cold end ) 6-4, a compensation wire 6-5, a compensation wire 2 6-6 and an insulating base 6-7. When calibrating, put the sheet-shaped thin-film thermocouple sensor 6 into the sensor slot 1-2 at the front end of the inner conical sleeve 1, and use the scale scale 1-1 at the right end of the sensor slot 1-2 for positioning to ensure that the sensor can be used in multiple calibration experiments. The temperature measurement point in the process is the same, or adjust the installation position of the sensor according to the need, so that it can be inserted into the designated position of the furnace for temperature measurement. After the po...

Embodiment 2

[0048] In order to make the temperature measurement of the thin-film thermocouple sensor more accurate, the temperature of the calibration furnace should be kept constant first. The overall diameter of the device is consistent with the inner diameter of the furnace. When calibrating, it is only necessary to insert the assembled fixture device into the furnace mouth so that the outer conical semicircle The outer surface of the sleeve is close to the furnace wall, and the insertion depth is until the outer conical semicircular sleeve snap ring 3-4 fits the furnace mouth, which realizes the heat preservation of the furnace simply and conveniently, making the ambient temperature of the thermocouple temperature measuring end ideal The required measurement temperature reduces experimental errors due to heat loss. In addition, in order to prevent the cold end (compensation end) 6-4 of the thermocouple sensor from being affected by the heat radiation of the furnace, it is necessary to ...

Embodiment 3

[0051] Sensor compensation wire connection:

[0052] Such as Figure 7 As shown, it is a three-dimensional schematic diagram of the sensor lead fixture tooling. The compensation wire of the sheet-shaped film thermocouple sensor 6 is installed and fixed by mechanical clamping method, and the thermocouples are placed in the thermocouple slots 4-5 of the fixture tooling. The short set screw 5 with the same length and diameter passes through the clamp threaded hole 4-4, so that the compensation wire 1 6-5 and the compensation wire 2 6-6 are respectively pressed on the surface of the pin 6-5 corresponding to the thermal electrode, and the completion The lead wires are connected so that the temperature measurement signal can be stably output to the instrument. Subsequently, the outer surface 4-3 of the fixture is inserted into the sleeve along the inner surface 1-8 of the inner conical sleeve. In order to prevent the relative displacement of the two during the calibration process, ...

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Abstract

The invention provides a multi-functional clamping device for calibration of sheet-shaped thin-film thermocouple sensors, comprising: a fixture body, the fixture body is formed by buckling an inner conical sleeve and an outer conical semicircular sleeve, and the inner conical sleeve There is a sensor card slot between the cylinder and the outer conical semicircular sleeve, and a scale scale is set on the right side of the sensor card slot; a threaded hole is opened at the front end of the inner conical sleeve, and the sheet-shaped film thermocouple to be tested is connected by a long set screw. The sensor is compressed. The inner conical sleeve is equipped with a matching lead fixture tooling, which adopts the mechanical clamping method and uses short set screws to press the thermocouple positive compensation wire and the thermocouple negative compensation wire to the corresponding thin film thermal electrodes respectively. . The device of the present invention solves the problem that the lead end of the sheet-shaped film thermocouple is easily broken in a high-temperature environment, and can be installed at the furnace mouth of various dry-type metering furnaces such as vertical and horizontal, which reduces the heat loss of the furnace during the calibration process and improves the accuracy of the experimental results.

Description

technical field [0001] The invention relates to the technical field of thermocouple detection, in particular to a multifunctional clamping device for calibrating sheet-shaped thin-film thermocouple sensors. Background technique [0002] The temperature difference thermocouple (thermocouple for short) sensor is one of the most widely used temperature sensing elements in temperature measurement at present, and it is a temperature measuring instrument based on the thermoelectric effect. It uses a thermocouple as a sensor, converts the measured temperature signal into a potential signal, and then connects the wire with a display instrument for measuring the voltage signal of the millivolt level to realize the temperature measurement. Among them, the sheet-shaped thin-film thermocouple has a small structure, is convenient to manufacture, is low in price, has a wide temperature measurement range, small thermal inertia, and high accuracy. It can be well attached to the surface of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K15/00
CPCG01K15/005
Inventor 崔云先高富来殷俊伟杜鹏黄金鹏
Owner DALIAN JIAOTONG UNIVERSITY
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