CN201014996Y

CN201014996Y - Anti-theft device of power apparatus

Info

Publication number: CN201014996Y
Application number: CNU2007200626434U
Authority: CN
Inventors: 邓加慧
Original assignee: LINWU JINYANG ELECTRICAL APPLIANCE TECHNOLOGY Co Ltd
Current assignee: LINWU JINYANG ELECTRICAL APPLIANCE TECHNOLOGY Co Ltd
Priority date: 2007-03-06
Filing date: 2007-03-06
Publication date: 2008-01-30
Anticipated expiration: 2017-03-06

Abstract

This utility model relates to an anti-theft device of power equipment which can differentiate system power off and phase-by-phase power off by independently dismantling the power equipment. This device is composed of a sampling circuit (1), a detection and identification circuit (2), a warning circuit (3) and a power supply circuit (4) through electric connection in the case body, and the detection and identification circuit (2) is provided with a tripping voltage comparator, a phase loss detection voltage comparator and two not-and gate circuit, thus this utility model can automatically differentiate system (D) power off and phase-by-phase power off by dismantling power equipment, and only the anti-theft alarm signal useful for the power equipment is given, to prevent losing power equipment owing to carelessness of users.

Description

The power equipment anti-theft device

Affiliated technical field

The utility model relates to the whether split device of stealing of a kind of power equipment, especially can compartment system has a power failure and removes the power equipment anti-theft device that power equipment pursues the behavior that has a power failure mutually separately.

Background technology

At present, the well-known patent No. 002290448 multifunction power transformer and circuit power-off alarm are a kind of devices that is specifically designed to power transformer and circuit burglar alarm, the characteristics that it utilizes every theft power transformer and circuit all will have a power failure are implemented antitheft, so long as have a power failure, it is just reported to the police.This illustrates that on the one hand it is antitheft highly sensitive, and it is also reported to the police to system blackout but then, and this just causes a kind of illusion to the user.Can not distinguish the system blackout or the defect of theft power transformer or line outage well because it exists, judge that to the user power transformer or circuit whether just in the stolen difficulty that increased, cause the user to benumb easily, power equipment is lost.

Summary of the invention

Can not distinguish the deficiency of system blackout or theft power transformer or line outage behavior in order to overcome existing multifunction power transformer and circuit power-off alarm, the utility model provides a kind of power equipment anti-theft device, whether this power equipment anti-theft device can not only detect power equipment and be had a power failure, and can automatic distinguishing system blackout and remove power equipment separately and pursue the behavior that has a power failure mutually, thereby send the antitheft valuable alerting signal of power equipment.

The technical scheme that its technical matters that solves the utility model adopts is: in the case shell, by sample circuit (I), detect discriminator circuit (II), warning circuit (III) and power circuit (IV) are electrically connected to be formed, the negative electricity of the diode (D5) in the in-phase input end of operational amplifier (IC1-1) and the sample circuit (I) is connected, the inverting input of operational amplifier (IC1-1) and resistance (R9, R10) the end tripping voltage comparer that is electrically connected to form, the positive electrical of the diode (D12) in the inverting input of operational amplifier (IC1-2) and the sample circuit (I) is connected, the in-phase input end of operational amplifier (IC1-2) and resistance (R11, R13) phase failure that is electrically connected to form of a end detects voltage comparator, the output terminal of operational amplifier (IC1-1) is connected with the negative electricity of diode (D14), the output terminal of operational amplifier (IC1-2) is connected with the negative electricity of diode (D16), diode (D14, D16) positive pole is electrically connected with an end of electric capacity (C7) with an end of resistance (R14), the inverting input of operational amplifier (IC1-3) is connected with the positive electrical of diode (D14), the in-phase input end of operational amplifier (IC1-3) and resistance (R12, R15) a end two NAND gate circuit that are electrically connected to form, resistance (R9, R13, R14, R15) the other end is connected with the positive electrical of power circuit (IV), resistance (R10, R11, R12) the other end is connected the tripping voltage comparer with the other end of electric capacity (C7) with the negative electricity of power circuit (IV), the phase failure detects voltage comparator and is electrically connected composition detection discriminator circuit (II) with two NAND gate circuit; Integrated circuit (IC2) is 555 time base circuits, and the negative pole of diode (D15) is electrically connected with the output terminal that detects the middle operational amplifier (IC1-3) of discriminator circuit (II), the positive pole of diode (D15) is electrically connected with an end of electric capacity (C9) with an end of resistance (R16), the other end of electric capacity (C9) is electrically connected with an end of resistance (R26) with the 2nd pin of integrated circuit (IC2), the 3rd pin of integrated circuit (IC2) is connected with the negative electricity of diode (D22) with an end of relay (J2) coil, the 4th pin of integrated circuit (IC2) is electrically connected with an end of resistance (R23) with the positive pole of electric capacity (C8) with the collector of triode (T1), the two ends of button (ANz) are electrically connected with electric capacity (C8) two ends respectively, the base stage of triode (T1) is electrically connected with an end of resistance (R27) with the negative pole of electric capacity (C10), the 6th pin the 7th pin of integrated circuit (IC2) is electrically connected with an end of resistance (R17) with the positive pole of electric capacity (C6), one end of relay (J2) normally opened contact (J2-1) is electrically connected with an end of alarm (BJ), the 1st pin of integrated circuit (IC2) is connected with the positive electrical of diode (D22) with the other end of relay (J2) coil, electric capacity (C6, C8) negative pole is connected with the positive electrical of diode (D22) with the other end of alarm (BJ) with the emitter of triode (T1), the 8th pin the 1st pin of integrated circuit (IC2) is connected with the anodal negative electricity of power circuit (IV) respectively, the 8th pin of integrated circuit (IC2) and resistance (R16, R17, R23, R26) the other end is electrically connected with the other end of relay (J2) normally opened contact (J2-1) forms warning circuit (III).Power circuit (IV) contains battery (DC), has power supply to supply with the usefulness of warning in order to continuing after AC transformer (B1) AC dump.Because the benchmark comparative voltage Ut on the tripping voltage comparer will be higher than the benchmark comparative voltage Ud on the phase failure detection voltage comparator, when outside three-phase voltage just often, being input to tripping voltage comparer and the phase failure from sample circuit (I) detects the voltage comparator signal voltage and all is higher than Ut, Ud, thereby tripping voltage comparer output high level, the phase failure detects the voltage comparator output low level, operational amplifier in two NAND gate circuit (IC1-3) output high level, integrated circuit (IC2) in the warning circuit (III) is that negative edge triggers, not adhesive of relay (J2), alarm (BJ) does not send chimes of doom; When system (D) has a power failure, be high pressure three-phase (A, B, C) or low pressure three-phase (a, b, c) outage simultaneously, electric capacity (C3, C4, C5) electric charge on is through identical load discharge, electric capacity (C3, C4, C5) terminal voltage all descends by the discharge index law simultaneously, the output voltage of sample circuit (I) also descends, when the terminal voltage on the resistance (R8) is brought down below Ut, tripping voltage comparer output low level, operational amplifier in two NAND gate circuit (IC1-3) output high level, the 3rd pin output low level of the integrated circuit (IC2) in the warning circuit (III), not adhesive of relay (J2), alarm (BJ) does not send chimes of doom; As high pressure three-phase (A, B, C) or low pressure three-phase (a, b, c) begin to stop first by having a power failure mutually mutually during inner certain open coil of electricity or power transformer (B2), electric capacity (C3, C4, C5) terminal voltage on certain electric capacity in will descend a lot, though the terminal voltage on the resistance (R8) is kept high level, the tripping voltage comparer continues the output high level, but the anodal terminal voltage of diode (D10) is lower than Ud, the phase failure detects voltage comparator output high level, this moment operational amplifier (IC1-3) output low level in two NAND gate circuit, the 3rd pin output high level of the integrated circuit (IC2) in the warning circuit (III), relay (J2) adhesive, alarm (BJ) sends chimes of doom; When system (D) when sending electricity, the tripping voltage comparer is exported by low transition to high level, make the electric capacity (C10) in the warning circuit (III) obtain a charging process, triode (T1) is in the full state that closes in this initial charge process, the 4th pin of integrated circuit (IC2) is a low level, integrated circuit (IC2) is reset, the 3rd pin output low level of integrated circuit (IC2), not adhesive of relay (J2), alarm (BJ) does not send chimes of doom, thereby automatic distinguishing system (D) has a power failure and removes power equipment separately by the behavior that has a power failure mutually, reaches the purpose of only sending the antitheft valuable alerting signal of power equipment.

The beneficial effects of the utility model are, automatic distinguishing system (D) has a power failure and removes power equipment separately by the behavior of power failure mutually, only sends the antitheft valuable alerting signal of power equipment, prevent from that the user from benumbing to cause power equipment to lose.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is a circuit block diagram of the present utility model.

Fig. 2 is circuit theory diagrams of the present utility model.

I. sample circuit among the figure, II. detects discriminator circuit, III. warning circuit, IV. power circuit, D. system, B2. power transformer.

Embodiment

In the drawings, resistance (R1, R2, R3) a end respectively with light emitting diode (LED1, LED2, LED3) negative pole and commutation diode (D9, D8, D7) positive electrical connects, resistance (R4, R5, R6) a end respectively with electric capacity (C3, C4, C5) positive electrical connects, diode (D10, D11, D12) positive pole is electrically connected with an end of resistance (R7), diode (D5, D6, D13) negative pole is electrically connected with an end of resistance (R8), commutation diode (D9, D8, D7) negative pole respectively with electric capacity (C3, C4, C5) positive pole and diode (D12, D11, D10) negative pole and diode (D5, D6, D13) positive electrical connects, light emitting diode (LED1, LED2, LED3) positive pole and resistance (R4, R5, R6) the other end and electric capacity (C3, C4, C5) negative pole is electrically connected with the other end of resistance (R8), the other end of resistance (R7) is connected with the positive electrical of power circuit (IV), the two ends of button (ANd) are electrically connected with light emitting diode (LED1) both positive and negative polarity respectively, and the negative electricity of the positive pole of light emitting diode (LED1) and power circuit (IV) connects to form sample circuit (I); Main coil (L1) two ends of AC transformer (B1) respectively with sample circuit (I) in resistance (R1, R2) other end is electrically connected, secondary coil (L2) end of AC transformer (B1) is connected with diode (D3) positive electrical with diode (D1) negative pole, secondary coil (L2) other end of AC transformer (B1) is connected with diode (D4) positive electrical with diode (D2) negative pole, diode (D3, D4) negative pole is electrically connected with resistance (R22) end, anodal and the electric capacity (C2 of resistance (R22) other end and battery (DC), C12) positive electrical connects, diode (D1, D2) anodal and battery (DC) negative pole and electric capacity (C2, C12) negative electricity connects to form power circuit (IV); In the case shell, sample circuit (I), detection discriminator circuit (II), warning circuit (III) and power circuit (IV) are electrically connected.Button (ANd) is the phase shortage checkout button in the sample circuit (I), after the utility model installs, press the button (ANd), electric capacity (C3) two ends decompression, the anodal output low level of diode (D10) detects discriminator circuit (II) output and jumps to low level by high level, integrated circuit (IC2) in the warning circuit (III) is triggered, the 3rd pin output high level of integrated circuit (IC2), relay (J2) adhesive, alarm (BJ) sends chimes of doom; Button (ANz) is a reset button in the warning circuit (III), integrated circuit (IC2) in warning circuit (III) is triggered, the 3rd pin output high level of integrated circuit (IC2), relay (J2) adhesive, alarm (BJ) is when sending chimes of doom, press the button (ANz), the 4th pin of integrated circuit (IC2) is in low level, and integrated circuit (IC2) is reset, the 3rd pin output low level of integrated circuit (IC2), relay (J2) discharges, and alarm (BJ) chimes of doom stops.

Claims

1. power equipment anti-theft device, in the case shell, by sample circuit (I), detect discriminator circuit (II), warning circuit (III) and power circuit (IV) are electrically connected, it is characterized in that: the negative electricity of the diode (D5) in the in-phase input end of operational amplifier (IC1-1) and the sample circuit (I) is connected, the inverting input of operational amplifier (IC1-1) and resistance (R9, R10) the end tripping voltage comparer that is electrically connected to form, the positive electrical of the diode (D12) in the inverting input of operational amplifier (IC1-2) and the sample circuit (I) is connected, the in-phase input end of operational amplifier (IC1-2) and resistance (R11, R13) phase failure that is electrically connected to form of a end detects voltage comparator, the output terminal of operational amplifier (IC1-1) is connected with the negative electricity of diode (D14), the output terminal of operational amplifier (IC1-2) is connected with the negative electricity of diode (D16), diode (D14, D16) positive pole is electrically connected with an end of electric capacity (C7) with an end of resistance (R14), the inverting input of operational amplifier (IC1-3) is connected with the positive electrical of diode (D14), the in-phase input end of operational amplifier (IC1-3) and resistance (R12, R15) a end two NAND gate circuit that are electrically connected to form, resistance (R9, R13, R14, R15) the other end is connected with the positive electrical of power circuit (IV), resistance (R10, R11, R12) the other end is connected with the negative electricity of power circuit (IV) with the other end of electric capacity (C7), and they are electrically connected to form detects discriminator circuit (II).