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

An array sensor and infrared image technology, applied in the field of sensors, can solve the problems of affecting temperature measurement accuracy, infrared array sensor measurement accuracy, misjudgment, etc., and achieve the effect of overcoming the distortion of measurement accuracy

Active Publication Date: 2019-01-18
SHANTOU UNIV
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  • Abstract
  • Description
  • Claims
  • 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

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

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Embodiment 1

[0024] Reference figure 1 , figure 2 , An infrared image array sensor dust interference calibration device in an embodiment of the present invention includes a reference reference voltage source 1, an error compensation circuit 2, an infrared pairing mechanism 3, and an infrared array sensor 4. The error compensation circuit is used to calculate the difference between the infrared pair tube mechanism and the reference reference voltage source, and perform difference compensation on the infrared array sensor according to the difference.

[0025] The infrared pair tube mechanism is set next to the infrared array sensor. Because the dust sensor is placed near the infrared image array sensor (<15CM), it will be simultaneously affected by environmental dust and other pollution, and the dust sensor sensor and the infrared image array sensor are used The same semiconductor infrared material, when the infrared is cleaning the surface of the tube, the infrared signal can be sent and rece...

Embodiment 2

[0030] In this embodiment, the error compensation circuit includes a deviation calculator, a multiplier, a unit converter, etc. The reference reference voltage source voltage U BASE Set to the full-scale voltage of the infrared dust sensor sensor. The infrared pair tube output U i With reference voltage U BASE As the input of the arithmetic unit, the deviation caused by pollution is calculated by formula 1. After calculating the reciprocal, input it into the multiplier as the compensation calculation of the infrared image array sensor. When the deviation ≥ 20%, the system will alarm. Since infrared tubes of the same material are used, and the infrared dust sensor sensor and the infrared image array sensor are in one place, the deviation of the two sensors is the same, and the dust interference of the infrared image array sensor can be calibrated and compensated through the compensation circuit.

[0031] Due to the influence of material and related non-linear errors, when the outp...

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Abstract

The embodiment of the invention discloses a device for calibrating dust interference of an infrared image array sensor, which comprises a datum reference voltage source, an error compensation circuit,an infrared pair tube mechanism and an infrared array sensor. The infrared pair tube mechanism is disposed aside the infrared array sensor; the error compensation circuit is used for calculating a difference value between the infrared pair tube mechanism and the datum reference voltage source and performing difference value compensation on the infrared array sensor according to the difference value. The embodiment of the invention further discloses a method for calibrating dust interference of the infrared image array sensor. By adoption of the device and the method in the invention, the infrared array sensor is effectively subjected to error compensation calibration through the infrared pair tube mechanism, thereby effectively overcoming distortion of the measuring precision caused by influence of the infrared array temperature sensor affected by attachments in the use process.

Description

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

Claims

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Application Information

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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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