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Method for measuring response time of pyroelectric infrared detector

A pyroelectric infrared, response time technology, applied in the field of infrared detectors, can solve the problems of difficult frequency control, low efficiency, unstable measurement data, etc., to achieve the effect of improving accuracy and reducing errors

Inactive Publication Date: 2016-09-07
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

In the existing equipment for measuring the response time of pyroelectric detectors, there are problems such as difficult frequency control, unstable measurement data, and low efficiency.

Method used

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  • Method for measuring response time of pyroelectric infrared detector
  • Method for measuring response time of pyroelectric infrared detector
  • Method for measuring response time of pyroelectric infrared detector

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Experimental program
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Embodiment

[0023] Embodiment: a kind of method for measuring the response time of pyroelectric infrared detector, its sequential steps are as follows:

[0024] Step 1: Establish a three-dimensional simulation model of the pyroelectric infrared detector, such as figure 2 As shown, the three-dimensional simulation model includes a bottom supporting layer structure, a bottom metal layer, a sensitive material layer and a top metal absorption layer stacked sequentially from bottom to top;

[0025] Step 2: Import the parameters of the pyroelectric infrared detector to be tested into the three-dimensional simulation model;

[0026] Step 3: Load the environmental boundary conditions on the 3D simulation model, set the temperature at the bottom of the support structure of the 3D simulation model to 27°C, and after loading the environmental boundary conditions on the 3D simulation model for 10 milliseconds, define the three-dimensional The stable temperature of the simulation model is T 0 , the...

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Abstract

The invention discloses a method for measuring the response time of a pyroelectric infrared detector, and belongs to the technical field of infrared detectors. The method includes: firstly, establishing a three-dimensional simulation model of the pyroelectric infrared detector; then importing a parameter of the pyroelectric infrared detector to be measured into the three-dimensional simulation model; loading an environment boundary condition, and continuously loading simulation dynamic heat radiation pulses on the three-dimensional simulation model till a dynamic balance temperature is achieved after the temperature of the three-dimensional simulation model is stable; acquiring a curve of the three-dimensional simulation model through the transient heat transmission finite element simulation analysis method, wherein the curve uses temperature rise as a vertical coordinate, and uses time as a horizontal coordinate; and using the corresponding time duration from a stable temperature to a dynamic balance temperature in the cure as the response time of the pyroelectric infrared detector. The method can truly simulate the working state of a device, greatly reduce errors due to approximate calculation, and improves the accuracy of measurement.

Description

technical field [0001] The invention relates to the technical field of infrared detectors, in particular to a method for measuring the response time of a pyroelectric infrared detector. Background technique [0002] The pyroelectric detector is a detection device for infrared radiation, which is made by utilizing the characteristic that the spontaneous polarization of the pyroelectric body changes with temperature. This device operates at room temperature and has a wide spectral range and high detectivity. Among thermal detectors working at room temperature, its low-frequency characteristics are comparable to those of high-frequency tubes and vacuum thermocouples, while its high-frequency characteristics are superior to any other thermal detectors. It is widely used in military, industrial, medical and health , scientific research and environmental monitoring and other fields. [0003] Current methods for determining the response time of pyroelectric infrared detectors are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/367
Inventor 刘子骥梁志清马振东伍浏权王涛蒋亚东
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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