Target detection system and method based on dynamic utilization of pyroelectric infrared sensor

Abstract

The invention discloses a target detection system and method based on dynamic utilization of a pyroelectric infrared sensor. The target detection system comprises a pyroelectric infrared sensor, a main controller connected with the pyroelectric infrared sensor, and an infrared collecting hardware processing unite respectively connected with the pyroelectric infrared sensor and the main controller. The target detection system also comprises a rotary table module and a signal processing module, wherein the rotary table module is arranged on the lower end of the pyroelectric infrared sensor, and is matched with the pyroelectric infrared sensor, and the signal processing module is arranged in the main controller. The target detection system and method based on the dynamic utilization of the pyroelectric infrared sensor in the invention can be used for realizing the detection of target signals by virtue of a larger vision angle and a positive working mode, and have high detection sensitivity and better application prospect in the detection field of the target signals.

Description

technical field [0001] The invention relates to a system and method for target detection using a pyroelectric infrared sensor, in particular to a target detection system and method based on a dynamic pyroelectric infrared sensor. Background technique [0002] Infrared radiation is very common in nature. As long as any object has a temperature higher than absolute zero (-273°C), it will radiate infrared rays to the surrounding space. Because the properties of different objects are different, the infrared radiation emitted by them is also different. The difference: the hotter the surface of an object, the more energy it radiates. The pyroelectric infrared sensor is mainly a detection element made of a material with a high pyroelectric coefficient, such as lead zirconate titanate, lithium tantalate, triglyceride titanium sulfate, etc. When the temperature changes, there will be structural changes in these detection elements. The relative displacement of the charge center cause...

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Problems solved by technology

[0009] The disadvantage of the above scheme is that the detector cannot be used in dynamic conditions, because once the detector moves, it means that the environment within its detection range is doing relative motion, so that all objects in the environment will have temperature changes and will If the pyroelectric output signal is caused, the detection result will be wrong; in addition, the main detection direction of motion is the lateral motion direction, and the ability to detect objects moving in the radial direction is relatively poor. These shortcomings greatly limit its scope of use.

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