Calibrating device and calibrating method thereof capable of providing air medium temperature source
A calibration device and air medium technology, applied in thermometer testing/calibration, thermometers, measuring devices, etc., can solve the problems of limited temperature range and high temperature uniformity, and achieve the effect of wide range temperature source
Inactive Publication Date: 2012-10-17
FIFTH ELECTRONICS RES INST OF MINIST OF IND & INFORMATION TECH
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Problems solved by technology
The temperature uniformity of this constant temperature bath is higher than that of the environmental test equipment. The main reason is that the test chamber of the temperature and humidity generator is completely immersed in the liquid medium constant temperature bath. However, the temperature range of this temperature and humidity generator is very limited. At present The best temperature range is only -10℃~70℃
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[0021] Such as figure 1 As shown, the air medium temperature sensor calibration source of the present invention includes an air source 1, a liquid constant temperature source 2, an air medium temperature source assembly 3 and a temperature monitor 4, and the air medium temperature source assembly 3 is directly placed on the liquid constant temperature source 2, it includes a test cavity 32 and a heat exchange tube 31 communicated with the test cavity 32, the gas source 1 is connected to the heat exchange tube 31 in a sealed manner, preferably through a silicone hose. In this way, relying on the self-sealing of the silicone hose tight connection can be achieved. The temperature monitor 4 usually selects a primary platinum resistance sensor to collect the temperature in the test chamber 32, and the temperature collected by the sensor to be calibrated in the test chamber 32 and the temperature collected by the primary platinum resistance sensor are all sent to the temperature mon...
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Abstract
The invention discloses a calibrating device and a calibrating method thereof capable of providing an air medium temperature source, which are used for calibrating a temperature sensor. The calibrating device comprises an air source, a liquid constant temperature source and an air medium temperature source assembly built in the liquid constant temperature source, wherein the air medium temperature source assembly comprises a testing cavity, a heat exchange tube communicated with the testing cavity, a bracket, a heat shield, an upper cover board and a cotton plug of a temperature testing cavity, an external wall of the testing cavity is provided with a fixed plate fixedly connected with the bracket and distributed along a circumferential direction, and the heat shield is fixedly connected to a top surface of the fixed plate in a manner of sealed connection so as to surround the testing cavity; and an inner cavity formed by the heat shield and the testing cavity is full of thermal insulation material, and the upper cover board seals the thermal insulation material in the inner cavity. The calibrating device provided by the invention can obtain the steady and uniform air medium temperature source relative to the liquid constant temperature source.
Description
technical field [0001] The invention relates to a calibration device for calibrating a temperature sensor, which is characterized in that it provides an air medium temperature source calibration device and a calibration method thereof. Background technique [0002] Different temperature sensors have different requirements for calibration methods. For example, the air medium temperature sensor is only suitable for air temperature measurement, using a non-contact temperature measurement method, which is not suitable for other aspects such as liquid temperature measurement; and temperature In most cases, the sensor is used in combination with other sensors. The temperature and humidity sensor used in the measurement of environmental parameters is a typical one. The temperature measurement object is determined by the nature of the humidity sensor and the measurement object. These The temperature measurement of the temperature and humidity sensor is only suitable for measuring th...
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IPC IPC(8): G01K15/00
Inventor 伍伟雄董德晖
Owner FIFTH ELECTRONICS RES INST OF MINIST OF IND & INFORMATION TECH