An infrared radiation thermometer for reducing background radiation
A technology of infrared radiation and background radiation, applied in the field of radiation thermometers, can solve problems such as reducing the accuracy of infrared radiation measurement, and achieve the effect of reducing radiation errors
Active Publication Date: 2021-03-30
成都芯铖科技有限公司
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Problems solved by technology
[0003] The device adopts a double-layer structure, plus blowing cold air to keep the internal temperature of the probe from being too high, and the reflector that reflects the radiation from the turbine blades will also reflect the infrared radiation radiated from the probe, which will further reduce the accuracy of infrared radiation measurement
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[0017] Such as figure 1 As shown, the radiation thermometer for measuring the temperature of the turbine blades is installed on the surface of the casing and placed between the two-stage turbine blades. The gas passes through the guide vanes at the front end of the engine and the high-pressure compressor 6 to complete the pressurization process. The high-pressure gas mixes with the fuel ejected from the fuel nozzle 5 to form high-temperature and high-pressure gas. Make it rotate, so that the energy of the airflow can be converted into mechanical energy output, therefore, the working environment of the turbine blade 2 is extremely harsh. The radiation thermometer 3 extends the probe part into the combustion chamber through the preset window of the casing, and the radiation flux emitted by the turbine blade 2 enters the inside of the thermometer through the window 17, and the internal optical system of the radiometer completes the measurement, collection, and processing of optic...
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The invention discloses an infrared radiation thermometer that reduces background radiation, belongs to the technical field of radiation thermometers, and is applied to temperature measurement on the surface of aeroengine turbine blades. The present invention overcomes the influence of the radiation thermometer measuring the background in the radiation temperature measurement process, uses the rotary cylinder to realize the 90° reciprocating rotation of the probe inside the thermometer, and realizes the measurement of the background radiation energy in the combustion chamber of the thermometer, thereby Reducing the effect of radiative background radiometric thermometry in turbine blade temperature measurements. It is very good at reducing the radiation error generated by the background of the radiometer, not only suitable for temperature measurement of turbine blades working under high temperature conditions, but also suitable for temperature measurement of other irregularly moving objects in high temperature environments.
Description
technical field [0001] The invention belongs to the technical field of radiation thermometers and is applied to temperature measurement on the surface of turbine blades of aeroengines. Background technique [0002] Patent application number 201710464605X discloses a device for collecting light on the surface of turbine blades. The device includes: a probe sleeve, a coated mirror, a lens swing control shaft, and a motion control servo motor; the coated mirror includes lenses and The mirror frame and the lens swing control shaft include 3 control rods, one end of which is movably connected to the mirror frame, and the other end is connected to the motion control servo motor; the coated mirror and the lens swing control shaft are located at Inside the probe casing, a light hole is opened at the position corresponding to the probe casing by the coating mirror; the probe casing includes an inner wall and an outer wall, and a gas cooling cavity is formed between the inner and oute...
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IPC IPC(8): G01J5/00
CPCG01J5/0022G01J2005/0033
Inventor 喻培丰王超姜晶张泽展
Owner 成都芯铖科技有限公司