Antitheft and alarm system of cable
An anti-theft system and anti-theft alarm technology, which is applied in the direction of anti-theft alarm mechanical start-up, alarms, alarms that rely on broken/disturbed straightened ropes/metal wires, etc., can solve the problem of affecting distance measurement accuracy and increasing total impedance. problem, to achieve a strong practical effect
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Embodiment 1
[0024] figure 1 A general diagram of a cable anti-theft alarm system consistent with a specific embodiment of the present invention is shown. As shown in the figure, the system needs to connect two alarm modules (distribution boxes) in series on the original power supply line to be transformed, which are respectively located at the power supply end and the power consumption end. The monitoring center is equipped with a central computer and alarm software to receive alarm information from the alarm box and provide alarm information to relevant personnel. It can also be configured to obtain alarm module information under the control of the monitoring personnel.
[0025] The alarm module on the cable has two working modes, normal mode and detection mode.
[0026] In normal mode, the equipment supplies power normally, and the alarm module detects the voltage on the cable. When the upper or lower alarm module detects that the cable is powered off, it enters the detection mode, and...
Embodiment 2
[0032] figure 2 It is a power supply terminal alarm module consistent with the embodiment of the present invention, image 3 It is an alarm module for power consumers consistent with the embodiment of the present invention.
[0033] The power supply terminal alarm module includes: power supply terminal, cable terminal, contactor, relay, wide temperature DC UPS module, door open sensor and cable detection board; the power consumption terminal alarm module includes: power consumption terminal terminal , Cable terminals, contactors, relays, wide temperature DC UPS modules, door open sensors and cable detection boards. As shown in the figure, the four main wires are neutral wire N, live wire L1, L2, and L3; the contactor is a wire package of a 220V AC contactor, and the contacts controlled by it are connected by a dotted line; the relay is a low-voltage relay, and its controlled normal The closed contacts are connected by dotted lines, the normally closed contacts are represent...
Embodiment 3
[0036] Figure 4 A schematic diagram of a cable sense board system consistent with an embodiment of the invention is shown.
[0037] The cable detection board includes a power-off relay interface, a door opening sensor interface, a voltage detection interface, an A / D acquisition module, a pulse generation module, a signal conditioning module, a broken cable detection interface, CPLD / FPGA, a mobile phone module and a host computer communication module .
[0038] In the normal working mode, the relay is released, the contactor inside the alarm module of the power consumption end and the alarm module of the power supply end is closed, the cable detection port is disconnected, and the cable detection board detects the voltage. When a transfer condition occurs, it switches to the cable detection mode. The relays of the two modules are closed, the contactor is released, the cable detection port is connected to the cable, and the detection signal is sent regularly. If the cable leng...
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