Human body recognition method, apparatus and device based on infrared sensor

An infrared sensor and human body recognition technology, which is applied in the field of human body recognition, can solve problems such as false alarms, decreased detection sensitivity, susceptibility to air flow, white light, electromagnetic radiation, ambient temperature and other factors, so as to improve recognition accuracy, The effect of improving the anti-interference ability

Inactive Publication Date: 2019-08-02
SHENZHEN PILOT GUARDS SAFETY TECH CO LTD
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  • Abstract
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Problems solved by technology

[0003] The main principle of infrared sensing for human body movement is to detect changes in the infrared spectrum emitted by the human body. It belongs to micro-signal detection and is easily affected by air flow, white light, electromagnetic radiation, ambient temperature and other factors. When the human body temperature is close to the ambient temperature, The detection sensitivity is significantly reduced, leading to the problem of false positives

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  • Human body recognition method, apparatus and device based on infrared sensor
  • Human body recognition method, apparatus and device based on infrared sensor

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Embodiment 1

[0028] The invention provides a human body recognition method based on an infrared sensor, comprising:

[0029] Step 1, read the output level of the infrared sensor in real time;

[0030] The surface temperature of the human body is about 34°C, and the peak value of infrared rays is about 10 μm. The signal generated by the movement of the human body corresponds to a frequency of 0.1-10 Hz. In this embodiment, the infrared sensor converts the frequency signal into a pulse level signal of the corresponding frequency.

[0031] Step 2, obtain the ambient temperature, obtain the temperature compensation value according to the ambient temperature and the ambient temperature compensation table, subtract the preset alarm threshold from the temperature compensation value to obtain an effective alarm threshold, and calculate the difference between the output level and the static level , judging whether the difference is greater than or equal to the effective alarm threshold, if so, judg...

Embodiment 2

[0035] The invention provides a human body recognition method based on an infrared sensor, comprising:

[0036] Step 1, read the output level of the infrared sensor in real time;

[0037] Step 2, obtain the ambient temperature, obtain the temperature compensation value according to the ambient temperature and the ambient temperature compensation table, subtract the preset alarm threshold from the temperature compensation value to obtain an effective alarm threshold,

[0038] Step 3, judging whether the level is within the effective alarm threshold range, if the output level is not within the effective alarm threshold range, it is determined that a human body has intruded into the measurement range of the infrared sensor,

[0039] If the output level is within the effective alarm threshold range, calculate the difference between the output level and the static level, calculate the average value of the difference, and update the static level to the average value. Due to the in...

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Abstract

The invention discloses a human body recognition method, apparatus and device based on an infrared sensor. The method comprises the steps of: reading an output level of the infrared sensor in real time; and obtaining an environment temperature, obtaining a temperature compensation value according to the environment temperature and an environment temperature compensation table, subtracting a presetalarm threshold from the temperature compensation value to obtain an effective alarm threshold, judging whether the level is within the range of the effective alarm threshold, and if the outlet levelis not within the range of the effective alarm threshold, judging that a human body invades the measurement range of the infrared sensor. According to the human body recognition method, apparatus anddevice disclosed by the invention, by obtaining the environment temperature and obtaining the temperature compensation value according to the environment temperature and the environment temperature compensation table, intelligent temperature compensation is performed on a sensitivity threshold, thereby improving the anti-interference ability of the infrared sensor to the external environment, andimproving the recognition precision.

Description

technical field [0001] The invention relates to the technical field of human body recognition, in particular to a human body recognition method, device and equipment based on an infrared sensor. Background technique [0002] Human body movement infrared sensing technology is widely used in people's lives, common such as human body induction switches are often used in stairs, walkways, toilets, elevators and many other general public living places. When the human body enters the sensing range of the switch, the microcomputer system of the switch can sense the infrared heat release changes of the human body movement, and at the same time automatically turn on the lighting until it senses that the person leaves and delays the preset time before automatically turning off. [0003] The main principle of human body movement infrared sensing is to detect changes in the infrared spectrum emitted by the human body. It belongs to micro-signal detection and is easily affected by air fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V9/00G01J5/00G01J5/52
CPCG01V9/005G01J5/0025G01J5/52G01J5/80
Inventor 邓先付
Owner SHENZHEN PILOT GUARDS SAFETY TECH CO LTD
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