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Human body heat source feature extracting and distinguishing method based on infrared pyroelectric information

A technology of feature extraction and discriminant methods, applied in character and pattern recognition, instruments, biological neural network models, etc., can solve problems that cannot be realized at the same time

Inactive Publication Date: 2014-04-16
TIANJIN UNIV
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AI Technical Summary

Problems solved by technology

Although PIR detectors have achieved some results in the detection of human and non-human heat sources, they cannot simultaneously detect large-scale, stationary infrared heat sources and achieve the goal of a high single feature recognition rate.

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  • Human body heat source feature extracting and distinguishing method based on infrared pyroelectric information
  • Human body heat source feature extracting and distinguishing method based on infrared pyroelectric information
  • Human body heat source feature extracting and distinguishing method based on infrared pyroelectric information

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Embodiment Construction

[0053] The present invention can use a single pyroelectric detector to realize a large range of 360 degrees and a relatively long detection distance, and also detect static infrared heat sources, extract the wavelet packet entropy of the PIR signal as a feature, and send it into the BP neural network for human body detection judge. Thereby effectively solving the conflict between comfort and energy saving in intelligent air conditioning and the problem of high false alarm rate in safety monitoring system.

[0054] Since heat sources of different shapes will generate different signals when they pass through the PIR detection range, this provides a theoretical basis for using pyroelectric sensors to detect human and non-human bodies. Accordingly, a single PIR detector with a Fresnel lens is driven by a stepping motor to rotate at a constant speed to realize long-distance, 360-degree wide-range, and stationary object detection. The detection range is a disc with a radius of 7.4 ...

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Abstract

The invention belongs to the technical field of human body distinguishing and discloses a human body heat source feature extracting and distinguishing method based on infrared pyroelectric information. The method aims to achieve 360-degree wide-range and remote detection and detection of static infrared heat sources and effectively solves the problems of confliction between comfort and energy saving of an intelligent air-conditioner and high false alarm rate of a safety supervision system. According to the technical scheme, the method comprises the steps that a stepping motor is adopted to drive a single pyroelectric infrared detector to rotate at a uniform speed, and then remote, 360-degree wide-range and static object detection is achieved; the detection range is a disk shape, wavelet packet analysis is conducted on collected human body heat source samples and non-human-body heat source samples, a signal wavelet entropy is taken as the features of the signal, 5-fold cross-validation is conducted by means of the BP neural network, and then human body heat resources are distinguished from non-human-body heat resources. The method is mainly applied to human body distinguishing.

Description

technical field [0001] The invention belongs to the technical field of human body discrimination. That is, the method of using pyroelectric infrared detectors to distinguish between human and non-human heat sources. Specifically, it involves a feature extraction and discrimination method for human body heat sources based on infrared pyroelectric information. Background technique [0002] Human body discrimination technology research has great application value and research significance. On the one hand: In recent years, people have become more and more interested in smart homes, and some of the control products of smart homes have become household appliances, and some are becoming household appliances. As an indispensable part of home appliances, air conditioners have experienced a stage of rapid development in the past ten years. Both comfort and energy saving have become important indicators of high-end consumer products such as air conditioners. Through the detection ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06N3/02
Inventor 刘永敬明东李佳佳张力新赵欣綦宏志
Owner TIANJIN UNIV
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