An intelligent burglar alarm system typically consists of various front-end detectors and a central receiving unit. The front-end detector identifies unauthorized entry and sends a signal to the alarm control unit. These systems are designed to protect different areas, such as specific points, lines, surfaces, or entire spaces. Among the most commonly used devices are infrared detectors, which come in various types depending on the environment and specific requirements.
One popular type is the dual-technology infrared detector, often referred to as an infrared dual detector. As the name suggests, this device combines two detection methods to trigger an alarm. An alert is only issued when both sensors detect a target either simultaneously or within a short time frame. This reduces false alarms and increases accuracy.
Common combinations include microwave and passive infrared detectors, as well as ultrasonic and passive infrared detectors. In terms of reliability, microwave and passive infrared dual detectors are considered the most effective. They have a significantly lower false alarm rate—421 times less than single-technology detectors and 270 times less than other dual-technology models. Because of their high performance, these detectors are widely used in many security projects.
It's also important to note that in certain special applications, different types of infrared detectors may be required to meet specific needs. Whether it's for residential, commercial, or industrial use, choosing the right technology can make a big difference in the effectiveness of the security system.
Source: http://Info424.html
Submitted by: http://news.chinawj.com.cn
Frequency Meter,Digital Frequency Meter,Frequency Meter Application,Frequency Meter Android
Yuyao Gongyi Meter Co.,Ltd. , https://www.yycj.com