Using physical means and electronic technology, automatic detection occurs in a defense monitoring of intrusions, generate alarm signals and auxiliary prompt on duty regional alarming, shows the possible responses, the burglar intrusion detection and alarm system.
«Ò» ¡ ¢ anti-theft detector class
Depending on the venue and to prevent regional select different alarm sensors.
In General, the doors and Windows can install door sensor switch, bedroom, living room, the installation of infrared and microwave probe and emergency button, the Windows install glass break sensor, kitchen installed smoke detectors, alarm control host installed in a room where to watch the subtle and removed immediately. Alarm host can be programmed to alert unit normally open, normally closed to distinguish the output signal to confirm that the corresponding area alarm occurred. For community security and financial units, you also need to install the phone dialer, when accidents occur, via the telephone line transmission of alarm information to the police, fire department or housing master.Thermal-infrared detector
Any objects from different surface heat, radiation intensity of infrared radiation.
Because the different object, the radiation of the infrared wavelength is different. Thermal infrared detector which uses this method to detect human body. Infrared detection is mainly used to detect human body and other invasion of mobile objects, when the body enters the detection range, stability of thermal radiation is destroyed, result in a change of heat radiation, infrared sensor receiving treatment, after enlargement, a beep signal. Due to the heating, air conditioning, electrical, infrared sensor can produce false positives, so the device and add a microwave detector.Microwave objects move Perceptron
Use of high-frequency radio waves Doppler frequency shift as a reconnaissance means that fit and open space or Plaza.
Microwave is a very high frequency radio waves, wavelength is short, easy to be objects reflection, on the basis of the incident wave and reflected wave frequency drift, you can detect intrusions.Infrared and microwave probe is alarm system commonly used device that prices are normally between 300 ~ $ 900.
It works Gallery infrared and microwave. When the infrared and microwave detector with alarm signal, the probe will alarm output, reducing false positives. Infrared and microwave probe there are many models that correspond to different detection range, some detecting a fan-shaped area, there is a long narrow area of detection (corridor), 360-degree detection, make sure to select the appropriate according to the specific needs of the model in order to achieve the desired effect. Detector sensitivity typically can be adjusted.Door contact switch is a widely used, low cost, easy to install and does not require adjustment and maintenance of the detector.
Door contact switch into removable parts and output part. Removable part installed in the active window and door; export parts installed in the Windows and doors, both installation distance not exceeding 10 mm. Output part has two lines, the normal status is normally closed doors and Windows open, the output exceeds 10 mm, output conversion as always.Glass break sensor
It uses piezoelectric micro-damper installed in the face of the glass, only on high-frequency sound of glass breaking through effective detection and therefore will not be affected by the shock of the glass itself caused the reaction.
Ultrasonic object movement detectors
Ultrasonic objects move Perceptron need a send ultrasonic and the other for receiving transducer, receiving and transmitting transducer has an ontology.
Usual emission of the transducer sending out a fixed frequency of ultrasonic, scattered in the detection of space, if you have an object reflected ultrasonic, its frequency offset arise, to detect whether there is a moving object. The detector is vulnerable to the effects of vibration and airflow.[1] [2] [3] [4]
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