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Device and method for calibrating infrared image array sensor dust interference

An array sensor and infrared image technology, which is applied in the field of sensors, can solve problems that affect temperature measurement accuracy, misjudgment, and infrared array sensor measurement accuracy, and achieve the effect of overcoming the distortion of measurement accuracy

Active Publication Date: 2020-08-11
SHANTOU UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] Due to the existence of dust, smoke and steam in the time industry and daily environment, the dust will stick to the surface of the infrared array temperature sensor, forming refraction, scattering, interference and absorption of infrared rays, which will affect the measurement accuracy of the infrared array sensor. Influenced, with the passage of time and the increase of attached crops, it will seriously affect the temperature measurement accuracy and cause misjudgment

Method used

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  • Device and method for calibrating infrared image array sensor dust interference
  • Device and method for calibrating infrared image array sensor dust interference
  • Device and method for calibrating infrared image array sensor dust interference

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Embodiment 1

[0024] refer to figure 1 , figure 2 A device for calibrating dust interference of an infrared image array sensor according to an embodiment of the present invention includes a reference voltage source 1 , an error compensation circuit 2 , an infrared alignment mechanism 3 , and an infrared array sensor 4 . The error compensation circuit is used to calculate the difference between the infrared pipe-to-tube mechanism and the reference voltage source, and perform difference compensation to the infrared array sensor according to the difference.

[0025] The infrared tube mechanism is set next to the infrared array sensor. Since the dust sensing sensor is placed near the infrared array sensor (<15CM), it will be affected by environmental dust and other pollution synchronously, and the dust sensing sensor and the infrared array sensor adopt For the same semiconductor infrared material, when the surface of the infrared tube is cleaned, the infrared signal can be sent and received w...

Embodiment 2

[0030] In this embodiment, the error compensation circuit includes a deviation calculator, a multiplier, a unit converter, etc., and the reference voltage source voltage U BASE Set to the full-scale voltage of the infrared dust sensing sensor. Among them, the infrared pair tube output U i with reference voltage U BASE As the input of the calculator, the degree of deviation caused by pollution is calculated by formula 1 After finding the reciprocal, input it into the multiplier as the compensation calculation of the infrared image array sensor. When the deviation is ≥ 20%, the system will alarm. Since the infrared tube of the same material is used, and the infrared dust sensing sensor and the infrared image array sensor are located at the same place, the deviation of the two sensors is the same, and the above compensation circuit can be used to calibrate and compensate for the dust interference of the infrared image array sensor.

[0031] Due to the influence of materials a...

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Abstract

The embodiment of the present invention discloses a device for calibrating dust interference of an infrared image array sensor, including a reference voltage source, an error compensation circuit, an infrared control mechanism, and an infrared array sensor. The infrared control mechanism is arranged on the infrared array Next to the sensor, the error compensation circuit is used to calculate the difference between the infrared tube alignment mechanism and the reference reference voltage source, and perform difference compensation to the infrared array sensor according to the difference. The embodiment of the invention also discloses a method for calibrating the dust interference of the infrared image array sensor. By adopting the present invention, the infrared array sensor is effectively compensated and calibrated for errors through the infrared tube-to-tube mechanism, and the distortion of measurement accuracy caused by the influence of attachments during the use of the infrared array temperature sensor is effectively overcome.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a device and method for calibrating infrared image array sensor dust interference. Background technique [0002] In nature, when the temperature of an object is higher than absolute zero, due to the existence of its internal thermal motion, it will continuously radiate electromagnetic waves to the surroundings, including infrared rays with a wave band of 0.75-100 μm. The infrared temperature sensor is made using this principle. made. Infrared sensing technology has been widely used in the fields of modern science and technology, national defense, industry and agriculture. With the development of microelectronics technology and the continuous expansion of sensor application fields, infrared sensors are changing from small and single-function to large-scale, Development in the direction of multifunctionality. [0003] Infrared temperature sensors are generally processed into a si...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J5/10
CPCG01J5/10G01J5/80
Inventor 庄哲民庄树昕袁野陈敬楠陈柱鹏刘博
Owner SHANTOU UNIV
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