Key points for the installation of anti-theft detectors burglar alarm

1. Vibration intrusion detector

1. Scope of application

Vibration detectors are basically surface controlled detectors. It can be used indoors or outdoors for perimeter alarms. The advantage is that early alarm can be achieved before the artificial protective barrier is broken.

The vibration detector can be applied indoors with open or dark compresses; Usually installed on walls, ceiling panels, floors or safes that may invade. When installed on the wall, the height of 2~2.4m from the ground is appropriate. The sensor is perpendicular to the wall. When it is applied outdoors, it is usually buried in the ground at a depth of about 10cm, and it is not suitable for burying in soft soil.

2. Installation points

(1) When the vibration detector is installed on the wall or ceiling panel, it must be firmly fixed with these objects, otherwise it will not be easy to feel the vibration. When used to detect ground vibration, the soil around the sensor should be compacted, otherwise the vibration wave is not easy to transmit to the sensor, and the detection sensitivity will decrease. The use of electric vibration detectors outdoors, especially on dirt, in the rainy season and winter, the sensitivity of the detector is significantly reduced, and the user should take other alarm measures.

(2) The installation position of the vibration detector should be far away from the vibration source. For outdoor applications, the vibration detector buried underground should be kept at an appropriate distance from other buried objects; Otherwise, the vibration of the surface layer caused by the shaking of these objects caused by wind blowing will also cause false alarms. Therefore, the distance between the vibration sensor and these objects should generally be maintained at a distance of more than 1~3m.

(3) Electric vibration detector is mainly used in outdoor buried perimeter alarm system. Its detection sensitivity is higher than that of piezoelectric crystal vibration detectors. The electrodynamic vibration detector magnet and the coil are prone to wear, usually checked once every six months, and the inspection interval when used in wet places is shortened.

Second, glass break intrusion detector

The installation position of the glass breaking detector is mounted on a hard wall or ceiling inlaid with glass, such as A.B.C. shown in Figure 7-15. The distance between the detector and the protected glass should not exceed the detection distance of the detector, and it should be noted that obstacles should not be placed between the detector and the protected glass to avoid affecting the propagation of sound waves; It should also not be installed in environments with excessive vibration.

1. Scope of application

Glass break detector is suitable for all places that need to guard glass shatterproof; In addition to protecting general doors and window glass, it can effectively control large areas of glass windows, display cabinets, kiosks, etc.

2. Installation points

(1) When installing, the acoustic and electrical sensor should be directly facing the main direction of vigilance. The sensor part can be properly concealed, but there should be no obstruction on the front of it. That is to say, the detector must have a clear line of sight on the protective glass surface, so as not to affect the propagation of sound waves and reduce the sensitivity of detection.

(2) When installing, it should be as close as possible to the glass to be protected, and as far away as possible from the noise interference source to reduce false alarms. In practice, the sensitivity of the detector should be adjusted to a suitable value, usually to detect the protected glass farthest from the detector, the sensitivity is too high or too low, it may produce false alarms or false negatives.

(3) Different kinds of glass break detector, according to their different working principles, some need to be installed next to the window frame (usually about 5cm away from the window frame), and some can be installed on the wall or ceiling near the glass, but the angle between the glass and the wall or ceiling should not be greater than 90, so as not to reduce its detection power.

Tags: anti-theft, detectors, burglar alarm