Fiber-fence-based intrusion detection system

The invention discloses a fiber-fence-based intrusion detection system comprising an induction module (100) and a feedback module (200). One end of a pulse light laser light source (101) is connected with one end of an optical coupler (103); the other end of the optical coupler (103) is connected with a dual-core cable (106); the other end of the dual-core cable (106) is connected with a photoelectric conversion plate (102); and the other end of the photoelectric conversion plate (102) is connected with a data processing part (201). A fence (104) and a door magnetic switch (105) coat the outside of the dual-core cable (106); two ends of the fence (104) are connected with one end of the door magnetic switch (105); and the other end of the door magnetic switch (105) is connected with a fixed medium. The feedback module (200) consists of a data processing part (201), a data storage part (202), a three-dimensional imaging part (203), an alarm device (204) and a feedback interface part (205). The system has advantages of high stability and low failed reporting rate and misstatement rate and is suitable for intrusion detection of various security accesses.