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Temperature-sensitive camera temperature compensation method and system

A technology of temperature compensation and sensitive camera, which is applied in the direction of radiation pyrometry, measuring devices, instruments, etc., can solve the problems of low precision of thermal camera and low measurement accuracy, and achieve high reliability, accuracy and precision High and low cost effects

Active Publication Date: 2021-02-23
南通嘉骏信息科技有限公司
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Problems solved by technology

[0006] Aiming at the problems of low precision and low measurement accuracy of thermal cameras in the prior art, the present invention provides a temperature compensation method and system for thermal cameras, which realize real-time monitoring of thermal cameras by using high-precision temperature sensing chips. Calibration to improve measurement accuracy

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  • Temperature-sensitive camera temperature compensation method and system
  • Temperature-sensitive camera temperature compensation method and system
  • Temperature-sensitive camera temperature compensation method and system

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Embodiment

[0040] When the traditional thermal camera 2 measures the temperature of the face, errors are prone to occur due to the influence of temperature or the difference in the measurement environment, which affects the temperature measurement accuracy. In this embodiment, the thermal camera 2 is calibrated in real time while measuring the temperature of the face. Improve the accuracy of temperature measurement.

[0041] The accuracy of the thermal camera is determined by factors such as temperature drift of the thermal camera 2 itself, temperature non-uniformity (Non Uniformity), temperature sensor offset, ambient temperature, and test distance. The thermal camera calibration system of this embodiment includes a thermal camera 2 and a black body, the thermal camera 2 is connected to a high-precision temperature sensor 1, and the temperature sensor is a temperature sensing chip. The high-precision temperature sensing chip used in this embodiment provides 16-bit temperature results, w...

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Abstract

The invention discloses a temperature-sensitive camera temperature compensation method and system, and belongs to the technical field of temperature-sensitive cameras. Aiming at the problems of low precision and low measurement accuracy of a temperature-sensitive camera in the prior art, the invention provides the temperature compensation method and system for a temperature-sensitive camera. A temperature sensor is connected in front of the temperature-sensitive camera, and a black body is arranged, by calculating the functions of the temperature measured by the temperature-sensitive camera, the actual temperature of the temperature sensor, the black body temperature, the environment temperature and the measured entity distance, the influence brought by factors such as the drifting of thecamera, the non-uniformity of the temperature-sensitive camera, the refractive index of the temperature sensor, the environment temperature and the measured distance is calibrated. According to the invention, the temperature compensation of the temperature-sensitive camera is realized in a low-cost and high-precision manner, the corresponding calibration is real-time, the temperature-sensitive camera can be used all the time after leaving a factory and only needs to be calibrated once, a black body does not need to be arranged during measurement, the relatively high measurement precision is obtained in a low-cost manner, and the reliability is good.

Description

technical field [0001] The present invention relates to the technical field of thermal cameras, in particular to a temperature compensation method and system for thermal cameras. Background technique [0002] Thermal cameras are also known as infrared cameras. Any object can radiate infrared rays as long as its temperature is higher than thermodynamic zero, and the infrared rays radiated by different temperatures are also different. Based on this principle, thermal cameras can detect the health status of the body through temperature. Thermal cameras have relatively high requirements on the operating temperature, because the thermal camera itself can only achieve an accuracy of about ±2 degrees Celsius or even ±5 degrees Celsius, and the ambient temperature and the distance between the face and the camera will affect the final reading, so it makes The error is extremely large. [0003] Conventional thermal cameras provide an automatic calibration mechanism (shutter), which c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J5/52
CPCG01J5/53G01J5/80
Inventor 王云龙罗煜
Owner 南通嘉骏信息科技有限公司
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