作为一个安全系统的前端,侵入检测器是十分关键的。随着传感器件及技术的发展,侵入检测技术先后经历了断线、磁簧、主动红外、高频感应、微波、超声波、人体红外及复合技术等阶段。目前,由于热释电人体红外技术的先进性和稳定性,已成为侵入检测设计的主流,而其他类型技术已被挤到窄小范围之内,但这个窄小范围是其他不同类型报警技术所难以 As a safety system front-end, intrusion detectors are crucial. With the development of sensor devices and technologies, intrusion detection technology has experienced such phases as breakage, magnetic reed, active infrared, high frequency induction, microwave, ultrasonic, human infrared and compound technology. At present, due to the advanced nature and stability of pyroelectric infrared technology, it has become the mainstream of intrusion detection design, and other types of technology have been squeezed into the narrow range, but this narrow range is the other different types of alarm technology difficult