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Temperature field measurement system and method based on single camera

A measurement system and temperature field technology, which is applied in the field of temperature field measurement system based on single camera, can solve the problems of high cost and low temperature field measurement accuracy

Active Publication Date: 2018-11-23
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problems of low measurement accuracy and high cost of the temperature field of the test piece in the prior art

Method used

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  • Temperature field measurement system and method based on single camera
  • Temperature field measurement system and method based on single camera
  • Temperature field measurement system and method based on single camera

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0102] This embodiment provides a temperature field measurement system based on a single camera, which is used to measure the temperature field on the surface of the object to be tested, such as figure 1 Shown is a schematic structural diagram of a temperature field measurement system based on a single camera, including a measuring device 2 and a computing device 3;

[0103] Measuring device 2 comprises entrance window 4, plate beam splitter 5, first mirror group, second mirror group, narrow-band filter group and camera 11, and according to figure 1 Installed at the position shown; when measuring the temperature field on the surface of the DUT 1, the DUT 1 is first subjected to thermal loading, and then the DUT 1 is placed at the position facing the incident window 4, since the DUT 1 itself Infrared rays can be emitted, and after passing through the flat beam splitter 5, they are divided into exactly the same beam one and beam two, and the beam one and the beam two enter the c...

Embodiment 2

[0113] On the basis of Embodiment 1, this embodiment provides a preferred temperature field measurement system based on a single camera. For relevant parts, please refer to the description of Embodiment 1. positional relationship.

[0114] Please continue to refer figure 1, the angle between the flat beam splitter 5 and the incident window 4 is preferably 45 °, so that the light rays that are horizontally incident on the flat beam splitter 5 from the test piece 1 are converted into a horizontal beam one, and the other part is a vertical beam. Direction of beam II. The included angles between the first reflecting mirror 7 and the second reflecting mirror 6 and the flat beam splitter 5 are respectively θ, and the opening direction of the included angle θ is toward the incident window side, and 0°<θ<20°. The angle between the third reflecting mirror 81 and the fourth reflecting mirror 82 is an acute angle, which can be adjusted according to the distance between the second refle...

Embodiment 3

[0116] On the basis of Embodiment 1 and Embodiment 2, this embodiment provides a single-camera-based temperature field measurement system. For related details, reference may be made to the descriptions of Embodiment 1 and Embodiment 2. The computing device is further described in this embodiment.

[0117] figure 2 is a schematic block diagram of a computing device, combined with figure 1 and figure 2 , the computing device 3 includes:

[0118] The temperature reservation module 301 is used to receive the target temperature value of the heated object 1, and determine the calibration coefficient K according to the target temperature value and the calibration coefficient curve, wherein the calibration coefficient curve is a correlation curve between temperature and calibration coefficient; K is the colorimetric A calibrated coefficient in the temperature measurement formula, the value of K changes with the temperature of the test piece 1. The coefficient K can be used to cor...

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Abstract

The invention discloses a temperature field measurement system and method based on a single camera, and the system comprises a measurement device and a computing device. The measurement device comprises an entrance window, a plate beam splitter, a first reflector group, a second reflector group, a narrow band filter group and a camera. The computing device comprises a temperature reservation module, an image receiving module, a matching module and a temperature calculation module. During measurement, the measurement window is aligned with a to-be-tested object, and the light is split into a first beam and a second beam after entering the plate beam splitter through the entrance window, wherein the first and second beams are reflected by the first and second mirror reflector groups into thecamera, so that two images exist in an image captured by the camera, and thus the temperature field of the to-be-tested object can be calculated by a colorimetric temperature measurement formula. Thesystem can capture the image with two target images through only one camera, and is suitable for the measurement of an ultra-high temperature field and a high-speed temperature field, and is high inmeasurement precision.

Description

technical field [0001] The invention belongs to the technical field of infrared pyrometry, and more specifically relates to a temperature field measurement system and method based on a single camera. Background technique [0002] Measuring the high-temperature temperature field on the surface of materials is of great significance in aerospace, machinery manufacturing, vehicle engineering and other fields. The development of engines used in aviation, automobiles, ships and other projects is characterized by high temperature. The engine turbine blades are the key components to be heated. Accurately measuring the surface temperature field distribution is an important part of evaluating its performance and predicting its life. The necessary prerequisites for reasonable selection of turbine blade materials, cooling design, and thermal barrier coating protection design. However, at present, the measurement of the temperature field on the surface of the engine turbine blade is res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J5/00
CPCG01J5/00G01J5/485
Inventor 刘战伟郝策谢惠民刘胜
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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