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Biological recognition method based on infrared sensor array algorithm

An infrared sensor, array algorithm technology, applied in the field of biometrics, can solve the problem of inability to detect the movement of small moving objects

Inactive Publication Date: 2014-08-13
常州果联科技有限公司
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Problems solved by technology

[0007] However, the disadvantages of these two infrared detection technologies are that they cannot detect the movement of small moving objects (such as within 10cm), and they are affected by high temperature and high humidity environments.

Method used

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  • Biological recognition method based on infrared sensor array algorithm
  • Biological recognition method based on infrared sensor array algorithm

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] figure 1 It is a schematic diagram of the structure of the infrared sensor array.

[0025] figure 2 Schematic diagram of biological recognition for an infrared sensor array.

[0026] Such as figure 1 As shown, in this embodiment, the controller simultaneously controls and collects an array composed of three infrared sensors Sa, Sb, and Sc. Of course, the number of infrared sensors can be increased according to actual needs, and the more the number, the more accurate. The main function of each infrared sensor is to emit a fixed wavelength of infrared rays and collect the reflected infrared intensity of this wavelength.

[0027] In this embodiment, the test time interval is set to 1 second.

[0028] 1) The controller activates the three infrared sensors Sa, Sb,

[0029] Sc emits and detects infrared rays and records the intensity d...

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Abstract

The invention provides a biological recognition method based on an infrared sensor array algorithm. The method comprises the steps that a controller controls a plurality of infrared sensors to emit infrared rays, the infrared sensors receive returned infrared ray intensity, and the controller obtains an infrared ray intensity effective value of each infrared sensor at a testing time interval; the difference value of the infrared ray intensity effective values of adjacent testing time intervals of each infrared sensor is computed; whether the difference value of the infrared ray intensity effective values of each infrared sensor is smaller than the preset reflecting intensity limiting quantity Dth is judged; and according to comparison of N continuous difference values and the Dth, whether a living body is in front of the infrared sensors is determined. The method has the advantages that the application range is very wide, compared with other moving detecting and infrared sensors technologies, especially in a monitoring range within 5 meters, moving changing of any object within 1 mm can be detected, and accurate displacement monitoring is matched for achieving living body existing recognition and living body entering-leaving recognition.

Description

technical field [0001] The invention relates to a biological identification method, in particular to a biological identification method based on an infrared sensor array algorithm. Background technique [0002] At present, the main methods for monitoring sports at home and abroad include: sound, vibration, and image data analysis after image capture to realize sports monitoring. Among them, image capture in the monitoring industry and data analysis of the screen are the main detection methods. The images collected by the camera according to different frame rates will be calculated and compared by the CPU according to a certain algorithm. When the screen changes, if someone walks by , the lens is moved, and the number obtained by calculating the comparison result will exceed the threshold and indicate that the system can automatically make corresponding processing. Now it has been widely used in network cameras, car monitoring locks, digital treasure guardians, baby monitors...

Claims

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Application Information

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IPC IPC(8): G01V8/20
Inventor 刘达唐克良胡舟燕
Owner 常州果联科技有限公司
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