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Infrared sensor detection temperature calibration method, system and refrigerator

An infrared sensor and temperature detection technology, which is applied to electric radiation detectors, radiation pyrometry, instruments, etc., can solve the problem of inaccurate temperature sampling of infrared sensors

Active Publication Date: 2020-12-15
QINGDAO HAIER SPECIAL ICEBOX
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] This application provides an infrared sensor detection temperature calibration method, system and refrigerator to solve the technical problem of inaccurate temperature sampling of existing infrared sensors

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  • Infrared sensor detection temperature calibration method, system and refrigerator
  • Infrared sensor detection temperature calibration method, system and refrigerator
  • Infrared sensor detection temperature calibration method, system and refrigerator

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Embodiment Construction

[0019] The specific implementation manners of the present application will be described in further detail below in conjunction with the accompanying drawings.

[0020] Take the whole machine as a freezer as an example. After the food is placed in the freezer for refrigeration, the infrared sensor is used to detect the surface temperature of the food above the food. There is an absolute deviation between the temperatures, and as image 3 As shown, the absolute temperature deviation ΔT has a linear relationship with the ambient temperature Ta, and the lower the ambient temperature Ta, the more obvious the absolute temperature deviation ΔT, and the smaller the absolute temperature deviation with the increase of the ambient temperature.

[0021] Such as Figure 4 As shown, under normal circumstances, when the ambient temperature is constant, the output temperature of the infrared sensor and the actual temperature of the food surface are approximately linear, that is, there is an ...

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Abstract

The invention discloses an infrared sensor detection temperature calibration method, system and refrigerator. When the whole machine is powered on, the start-up ambient temperature value obtained by the auxiliary temperature sensor and the start-up infrared sensor temperature value obtained by the infrared sensor, as well as the set ambient temperature value and set the infrared sensor calibration temperature value, substituting two groups into the infrared sensor calibration output formula P=aT+b, determining the a and b values ​​of the infrared sensor calibration output formula, thus establishing the infrared sensor calibration output formula that conforms to the infrared sensor itself , so that the calibration output value of the infrared sensor can be determined according to the detection temperature output by the infrared sensor, that is, the correct detection temperature of the target to be measured can be determined, and the difference in the individual detection error of the infrared sensor when it leaves the factory is corrected and compensated, which improves the food quality of the refrigerator. The accuracy of temperature detection also improves the accuracy of refrigeration function adjustment.

Description

technical field [0001] The invention belongs to the technical field of refrigeration applications, and in particular relates to an infrared sensor detection temperature calibration method, a system and a refrigerator. Background technique [0002] In freezer products, there are some adjustment functions of the cooling state for the actual temperature of refrigerated food, among which, obtaining the actual temperature of refrigerated food is very important. [0003] In the prior art, a thermistor sensor is usually used to obtain the ambient temperature in the refrigerator, but in fact, there is a difference between the ambient temperature and the actual temperature of the food, which is not conducive to the judgment and adjustment of the refrigeration state. Infrared sensors can detect the surface temperature of food, but when the infrared sensor leaves the factory, the measurement error among individuals is not uniform, resulting in inaccurate temperature sampling of the ref...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J5/00G01J5/20
CPCG01J5/00G01J5/20G01J5/80
Inventor 范志军蒋彬李彦玫李闻天宫春晖
Owner QINGDAO HAIER SPECIAL ICEBOX