One of the best-known driveway alarms is the Dimango door chimes. These alarm systems come in two varieties. Wireless and wired driveway security systems. They all detect visitors at your driveway entrance and signal your door chimes to play your favorite chime.
The wireless systems come in models, which uses a pressure probe to activate a cellular controller, which signals the door chime. It is designed to be placed either 1000 feet or up to 3000 feet distance from your home. These driveway alarm systems need to be used in conjunction with a surveillance camera or optical device and entry control system installed in conjunction with a driveway fence. Just as you would place a lock and a control on the entry into your home; so should you do the same if you had an estate with a large driveway. The next model of the driveway wireless alarm is one, which uses an infrared motion detector to activate a cellular control, which also activates your favorite tune on your doorway chime.
There are driveway alarm systems, which use continuous radar sensors to detect movement up to 1200 feet from the house. These can be used effectively as a perimeter defense for a larger estate but can be used to detect movement at the entry gate to be some distance from the manse. There are more sophisticated ground surveillance radars, which can show individual movement and vehicle traffic. It shows the target's direction and rate of travel. These also are wireless driveway alarms and employ a cellular controller which rings either the front door chime or which can be routed to either a handheld receiver or a security station. Should this be the design requirement, one should also install an optical tracking surveillance system, which can view the entire progress of the visitor onto the estate.
All security systems should have an embedded battery backup should there be failure. These systems should be configured on the lithium mercury batteries, which have gained popularity in laptop computers, camcorders and other electronic devices, including cellular phones. There are other hybrid systems, which use hard wire power to the control devices. The difference in this case, is that battery power is primary and wire is the secondary power supply. These remain wireless in that the means to communicate is wireless or broadband. The wireless devices are unique in that the frequency of each device can determine its unique frequency independent of your neighbors. This sophistication is common among home television sets, which utilize broadband devices to set internal clocks for automatic daylight savings.
Finally, there are wired driveway security alarms, which utilize infrared, continuous wave radar, and pressure sensors to determine when a visitor passes the front gate of your drive. These systems utilize the electrical current to carry the sensor signal to your front door chime. Consider the electrical current as a signal carrier wave for the sensor devices that protect your driveway. They appear to be no different from the wireless except they do not use ultrafrequency radio waves to alert the residents at the house whenever there is a visitor.
Some driveway alarm systems, use continuous radar sensors to detect movement up to 1200 feet from the house