Detection device and detection method thereof

Abstract

The invention provides a detection device. The detection device distinguishes at least two independent detectable blocks from a detection zone; when an object enters the detection zone and reflects a detection medium sent by a signal emission source, a receiving element receives the reflected detection medium and feedback a received signal to an analysis and control circuit, and the analysis and control circuit recognizes and processes signal characteristics and reflection direction of the received signal, and then the received signal is output by an output interface circuit. The detection device has the advantages of simple structure, convenient mounting and wide application scope. As the detection device can examine the signal characteristics, and can analyze and judge information such as size, direction/speed/angle of motion and the like of the object entering the detection zone, the detection accuracy of the detection device is high, false alarm can be avoided when the detection device is used for intrusion detection, and the detection device can also be used in various fields such production process supervision/quality monitoring and the like.

Description

【Technical field】 [0001] The invention relates to a detection device, in particular to a reflective detection device with an acoustic / optical medium as a signal emission source and a detection method thereof. 【Background technique】 [0002] The windows and balconies of buildings are vulnerable to intrusion. There are several electronic protection technologies commonly used at present: one is the reed type magnetoelectric sensor, which is a more reliable anti-intrusion detection device for doors and windows, and the price is relatively low. There is a basis for popular application, but because the intrusion detection function can only be realized when the doors and windows are closed, the practicability is greatly limited, especially in buildings located in tropical and subtropical regions, under the actual application conditions where the windows are often opened, It is difficult to play its preventive role; the second is the passive infrared detector, which can prevent door...

AI Technical Summary

Problems solved by technology

[0002] The windows and balconies of buildings are vulnerable to intrusion. There are several electronic protection technologies commonly used at present: one is the reed type magnetoelectric sensor, which is a more reliable anti-intrusion detection device for doors and windows, and the price is relatively low. There is a basis for popular application, but because the intrusion detection function can only be realized when the doors and windows are closed, the practicability is greatly limited, especially in buildings located in tropical and subtropical regions, under the actual application conditions where the windows are often opened, It is difficult to play its preventive role; the second is the passive infrared detector, which can prevent doors and windows, but due to the thermal working principle, it is not only susceptible to interference from pets, sunlight and other heat sources with the same frequency as the sensitive frequency of the thermal element, The disadvantage of causing false alarms; at the same time, there is also the fatal weakness that it can only be installed and used indoors, which fundamentally restricts the practical value and popularization of this type of product; the third is the traditional active infrared intrusion detector, which has single beam and double beam , four-beam and other types, although the use is more reliable and the price is not too high, but its working principle is that each infrared beam has the same frequency and the same modulation, and it is required to generate an alarm signal when all the infrared beams are blocked, so its The defense surface is narrow, not suitable for intrusion prevention of windows, balconies and other parts

Chinese patent 99117200.0 discloses a (active) infrared anti-theft device that adopts completely different infrared beams with different modulation codes to realize protection. It can be installed on outdoor walls to effectively prevent windows and balconies. There are conflicts in appearance and inconvenient installation and operation, which affect its popularization and application; Chinese patent 00117362.6 discloses another reflective (active) infrared anti-theft device, which includes an infrared receiver located on the same side as the infrared transmitter. When the infrared receiver receives the infrared rays reflected from the surface of the intruding object with the same code as the emission, the detector will send out an alarm signal. It has little effect on the appearance of objects and can provide effective protection against doors, windows, balconies or passages. However, as long as the detector of this structure detects an object reflecting infrared rays with the same code as the emission, it will alarm, so that insects flying in the protection area , Infrared rays reflected by small animals such as mice moving within the defense zone will also cause false alarms, and the use effect is not ideal

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