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A short-type temperature sensor ultra-high temperature calibration device and method

A temperature sensor and ultra-high temperature technology, applied in thermometer testing/calibration, thermometers, measuring devices, etc., can solve difficult application problems and achieve the effect of lowering the temperature

Active Publication Date: 2021-07-13
BEIJING RES INST OF TELEMETRY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods are mainly used for the calibration of short-type temperature sensors at 300-1300 °C, and it is difficult to apply them at higher temperatures

Method used

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  • A short-type temperature sensor ultra-high temperature calibration device and method
  • A short-type temperature sensor ultra-high temperature calibration device and method
  • A short-type temperature sensor ultra-high temperature calibration device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] For a short type temperature sensor such as figure 1 shown) to carry out the calibration work at 400-1100°C. The sensor has two important lengths, which are the length of the high temperature zone and the length of the water cooling zone. The length of the high temperature zone is the maximum length that the sensor can withstand the high temperature of the test environment. Water cooling The zone length is the maximum length over which the sensor can accept good water cooling. The sensor used in this embodiment has a length of 20 mm in the high temperature zone and a length of 10 mm in the water cooling zone. Select the appropriate conversion tooling according to the size of the sensor (see figure 2 ), so that the sensor can be fully water-cooled, and the length of the front end extending into the small graphite cavity is reasonable. In order to ensure the calibration accuracy, a W526 tungsten-rhenium thermocouple is assembled into the calibration device together wit...

Embodiment 2

[0053] For a short type temperature sensor such as Figure 4 Shown) Carry out the calibration work at 600-1800°C, the length of the high temperature zone of the sensor is 40mm, and the length of the water cooling zone is 25mm. The assembly process is similar to that of Example 1. After the installation is completed, the vacuum pump is turned on to draw a vacuum. Since this example needs to raise the temperature to 1800°C, in order to prevent high-power breakdown, the furnace body is filled with high-purity argon after the vacuum is drawn. slightly greater than atmospheric pressure.

[0054] Such as Figure 5 As shown, in this embodiment, the temperature rises from room temperature to 1800° C., starting from 600° C. at every 200° C., and maintaining each temperature point for 30 minutes.

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Abstract

The invention discloses a short-type temperature sensor ultra-high temperature calibration device and method. The device forms a uniform ultra-high temperature field in a small-diameter graphite cavity through electromagnetic induction heating, and adopts a front-end heating and a rear-end water cooling method to simulate The large temperature gradient of the sensing probe under actual working conditions. In order to achieve precise temperature control in the graphite chamber, the calibration device adopts a symmetrically placed double graphite chamber design, one graphite chamber is used for heating the probe to be calibrated, and the other graphite chamber is used for infrared temperature control. In order to avoid the influence of the temperature difference between the two graphite chambers on the calibration work and perform high-precision calibration, this calibration device can realize the calibration of the probe to be marked and the thermocouple in the graphite chamber.

Description

technical field [0001] The invention belongs to the field of calibration of temperature sensors, in particular to a short-type temperature sensor ultra-high temperature calibration device. Background technique [0002] Temperature is an important physical quantity in environmental monitoring, so temperature sensors are widely used in scientific research and industrial production. In recent years, with the wide application of short temperature sensors in aerospace, iron and steel smelting, petrochemical and other industries, the measurement of target temperature parameters under extremely high temperature and severe working conditions has become an important technical requirement. Calibration conditions, as a key technology in the development of ultra-high temperature temperature sensors, are an important reason restricting its development. After long-term development in foreign countries, a fairly complete system has been formed in ultra-high temperature calibration. In Chi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K15/00
CPCG01K15/002G01K15/005
Inventor 毛国培李金洋史青何文涛
Owner BEIJING RES INST OF TELEMETRY