Temperature measuring system based on image sensor

Abstract

The invention discloses a temperature measurement system based on an image sensor, which is characterized in that: it includes an imaging system, an image sensing system and an image processing system; the imaging system includes a filter and a lens, and the lens includes a lens and an aperture for The thermal radiation signal of the measured object is gathered on the photosensitive surface of the CCD, and the passing luminous flux is controlled at the same time; the image sensing system includes a color CCD camera and a USB extender, and the color CCD camera is used for photoelectric conversion, outputting temperature information RGB signal and USB extension are used to realize remote control and remote high-speed transmission of data; the image processing system is used for temperature calculation, temperature field display and analysis and processing data. The three-primary-color temperature measurement method of the invention reduces the temperature measurement error caused by factors such as the gray scale change of the heat radiator and the non-ideality of the CCD response wavelength bandwidth, and the image segmentation method can quickly and accurately segment the target image.

Description

technical field [0001] The invention relates to the field of temperature measurement, in particular to a non-contact temperature measurement system based on an image sensor. Background technique [0002] The non-contact temperature measurement method is to use the functional relationship between the radiation intensity of the object and the temperature to realize the temperature measurement. advantage. [0003] However, the emissivity of an object is affected by the optical system, site environment, surface characteristics and material properties, and is also affected by the measured temperature, CCD spectral response, integration time and aperture size, and the measured results have large errors. . Processing the temperature measurement image requires fast and effective recognition of the image target in order to accurately measure the temperature of the image. In terms of rapid image segmentation, the general method is to improve the existing traditional algorithm. Alth...

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Problems solved by technology

[0004] Now commonly used temperature measurement methods include monochromatic temperature measurement method and colorimetric temperature measurement method, but the monochromatic temperature measurement method needs to select a very narrow band to eliminate the interference radiation of other wavelength light waves, but the bandwidth is too narrow, which will make the detection The energy received by the detector becomes very small, unable to produce enough response, and will bring a large error; use the colorimetric method to measure temperature, only when the actual object is a black body or gray body, the measured temperature is the actual object Temperature, colorimetric temperature measurement ignores the influence of changes in the spectral emissivity of the actual object on the temperature measurement results. The spectral emissivity is related to factors such as materials, temperature and wavelength, and cannot be accurately known, so there are still large errors

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