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Infrared detection system

An infrared detection and infrared reception technology, applied in the field of infrared detection, can solve the problems of low integration, large volume, and lack of applicability, and achieve the effects of low cost, energy saving, good anti-interference ability and fault tolerance

Inactive Publication Date: 2013-06-12
RFDOT MICROELECTRONICS
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Problems solved by technology

The final product is relatively large in size and low in integration, so it does not have good applicability for some occasions with narrow application environments or high integration requirements

Method used

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Embodiment Construction

[0027] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] Please refer to figure 1 , which shows a structural block diagram of the infrared detection system 100 in an embodiment of the present invention. The infrared detection system 100 includes a signal generating module 110 , an infrared emitting module 120 , an infrared receiving module 130 , a receiving and amplifying module 140 and a signal identifying module 150 .

[0029] The signal generating module 110 generates a reference signal for modulating infrared rays, and the reference signal includes a pulse signal with a fixed duty ratio of a predetermined working time at intervals of a predetermined idle time. That is to say, the reference signal includes several sections of idle signals and working signals, the idle signals...

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Abstract

The invention discloses an infrared detection system. The system comprises the following modules: a signal generation module, which is used for generating a reference signal and a section of predetermined free time includes a pulse signal of a fixed duty ratio of the predetermined free time; an infrared transmission module, which is used for exciting an infrared light emitting diode to emit an infrared ray by utilizing the reference signal; an infrared receiving module, which is used for receiving the infrared ray to obtain a target signal by utilizing an infrared receiving diode; a receptionamplification module, which is used for amplifying the target signal; and a signal identification module; according to the signal identification module, each section of the predetermined free time carried out sampling on the target signal in the predetermined working time to obtain a series of sampling points; a sampling point corresponding to a positive pulse within each period in the pulse signal and a sampling point corresponding to a negative pulse within each period in the pulse signal are respectively input into integrating circuits; and then it is determined whether output voltage values of the integrating circuits exceed a predetermined threshold value; if so, it is determined that an object is detected and a determination result is output.

Description

【Technical field】 [0001] The invention relates to the field of infrared detection, in particular to an infrared detection system with high integration and low power consumption. 【Background technique】 [0002] Active infrared detection equipment is an infrared detection equipment that detects by actively emitting infrared rays and then receiving infrared rays reflected back from objects. The disadvantage of traditional active infrared detection equipment is that the anti-interference ability is very weak. In the case of changes in the detection or working environment, such as the detection environment being affected by light, different temperature differences in the working environment, etc., the detection ability of the active infrared detection equipment will be affected. The situation is greatly reduced, because at this time the infrared rays received by the active infrared detection device include not only the actively emitted infrared rays, but also the external infrare...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V8/10
Inventor 冯向光孙海顾奇龙
Owner RFDOT MICROELECTRONICS
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