Ultra Sonic Burglar Alarms
Ultra Sonic Burglar Alarm System
Burglar alarms that use ultrasonic waves are generally created in the following manner. The main unit will generate a high frequency oscillating signal that will then be relayed to each specific remote unit that consists of an amplifier,transmitting oscillator, and a receiving oscillator. The wave oscillator will transmit an ultrasonic wave to the basic entry points where an intruder will likely try to break in through, such as the doors , windows, balcony etc. When a break in attempt occurs and the intruder enters an area radiated by ultra sonic waves, this will cause a disruption of the ultrasonic waves being emitted in that particular area. The variation then becomes an input signal to sound the alarm.
If there are two or more remotes units installed in close proximity, interference may occur due to interference by the different oscillating 
frequencies created by the main units and the remote units. This can occur if the main unit and other remote units are connected to the same power source lines and transmitting signal lines. For example , if the main unit is installed in the kitchen, and all other small remote units are installed on windows and doors throughout your home , it may be a good idea to use separate wiring for power source lines and for signal transmitting lines to prevent oscillating “beating” or interference. This however may require
burglar alarm system
additional wiring which may make the system hook up much more complex .
However most newer systems have been designed to eliminate this type of interference. The solution is that all main units will connected using a single power line sent from the main unit to all other remote units eliminating the need for a separate signal transmitting line. In other words the employment of insulated “shielded” wires are used to replace the separate wire configurations of the previous generation of ultrasonic burglar alarm systems. These shielded wiring configurations also help to reduce electrical noise which can create problems with an alarm systems detection signal because of disturbance in the wave transmissions to the remote units.
All in all with the advancement in technology today most of these issues have been resolved, resulting in systems that no longer create conflicting frequencies by the way the ultrasonic waves are transmitted.
If you enjoyed this post, make sure you subscribe to my RSS feed!
Leave a comment