CN2177244Y

CN2177244Y - Anti-theft, shock-proof alarm

Info

Publication number: CN2177244Y
Application number: CN 93243054
Authority: CN
Inventors: 李元新
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-10-26
Filing date: 1993-10-26
Publication date: 1994-09-14
Anticipated expiration: 2003-10-26

Abstract

The utility model relates to an anti-theft, shock-proof alarm, comprising a shell, a power supply, an induction voltage comparing unit 1, a current amplification unit 2 and an optical acoustic alarm 3. The two ends of the resistor R[1] of the induction voltage unit 1 are respectively connected with an induction plate A, a diode D[1] and a positive pole. The positive input foot of the integrated operational amplifier IC[1] of the current amplification unit 2 is connected with the induction plate, the inverse input foot is connected with the center tap of the adjustable resistor R[2], and the output foot is connected with the alarm 3. The utility model can remotely sense and measure the alarm voltage of a space electric field and can be used for circuit repair and measuring the break site of the wires in wall, and the utility model also has an anti-theft alarm function.

Description

Anti-theft, shock-proof alarm

The utility model relates to antitheft, protection against electric shock warning field.

At present, protection against electric shock test pencil used in everyday is that nib is inserted power supply, and whether just can measure as the loop with human body has.The weak point of this test pencil is: one when being to use, and the people is got shocked, and the 2nd, under the strong situation of illumination, light shows and do not see, the 3rd, the electric wire of cloth opens circuit within the walls, is difficult to find.

The purpose of this utility model is exactly the deficiency at above-mentioned test pencil, and provide a kind of power supply that need not directly contact just can measure power supply at a distance and whether have, can measure position underground or that break within the walls, hidden danger faults such as the local ground connection of lead, and under moisture conditions, use the people's that do not shock by electricity protection against electric shock alarm, also have anti-theft feature simultaneously.

The utility model comprises that housing, power supply, induced voltage unit (1), electric current amplify comparing unit (2) and optoacoustic alarm (3), and induced voltage unit (1) is by diode D ₁, resistance R ₁And sensing chip (A) is formed resistance R ₁One termination sensing chip (A), another terminating diode D ₁Positive pole, diode D ₁Minus earth, electric current amplifies comparing unit (2) by integrated operational amplifier IC ₁With adjustable resistance R ₂Form integrated operational amplifier IC ₂The forward input pin connect sensing chip (A), oppositely input pin meets adjustable resistance R ₂Center tap, output pin connects optoacoustic alarm (3), its anodal pin and negative pole pin connect the positive pole and the negative pole of power supply respectively.

Advantage of the present utility model is: the one, need not directly contact power supply, and just can remote sensing whether chargedly measure.If any electricity, just send light indication and acoustic alarm.The 2nd, the remote sensing distance, distance is adjustable, and alarm voltage is adjustable, about city voltage 0.5M, about high pressure (10 kilovolts) 3-7M; The 3rd, but line maintenance is convenient under the geodetic or the position of breaking within the walls; The 4th, can report to the police to harmful electric field, volume is little, but integrated modular.Production cost is low.

Accompanying drawing is a circuit diagram of the present utility model.

Embodiment:

Resistance R ₁Selecting resistance for use is 3.2 million, one termination sensing chip (A), another terminating diode D ₁Positive pole, diode D ₁Select the ZCP type for use, its minus earth, sensing chip (A) is a metal material, the sensing chip area is 3.5-4.0cm ², integrated operational amplifier IC ₁Select the CA3140 of U.S. RCA Corp. type for use, R ₂Select accurate adjustable resistance, R ₂Effect be to IC ₁Comparative voltage is provided, and its resistance is 30K Ω, and K switch is selected three function switchs for use, and CA1340 type (forward input) 2 pin connect sensing chip, and 3 pin (oppositely input) meet adjustable resistance R ₂Center tap, resistance R ₃One termination negative pole, another termination positive pole, 4 pin connect power cathode, and 7 pin connect positive pole, the light emitting diode D of 6 pin device taking alarm ₂Positive pole, the minus earth of light emitting diode, the photoresistance R of alarm (3) ₃One termination power positive pole, another termination language set becomes IC circuit ₂The triggering pin, R ₃Static resistance be more than 3,000,000, resistance R ₄One termination power positive pole, another termination language set becomes IC circuit ₂The vibration pin, resistance 240K Ω, triode BG ₁The b utmost point meets IC ₂Output pin, E utmost point ground connection, the C utmost point meets Microspeaker BL, BG ₁Select 9013 types for use, electrochemical capacitor C ₁One termination power positive pole, another termination loudspeaker BL, C ₁=1 μ F in order to make the entire circuit working stability, is provided with a stabilivolt DW on power supply, model is 2CW55.The operating voltage of entire circuit is 9V.

Its principle of work is: sense the space when having electric field to exist when sensing chip, sensing chip produces induced voltage over the ground, by diode D ₁, resistance R ₁And form bigger alternating signal electric current in the circuit of sensing chip (A) composition, through diode D ₁Rectification, resistance R ₁Voltage is promoted, and formed electric signal is input to integrated operational amplifier IC ₁, through amplification ratio after, driven for emitting lights diode D ₂Luminous warning.Photoresistance R ₃Receive D ₂Light signal, conducting triggers IC ₂, produce sound signal, through BG ₁Amplify, promote loudspeaker and send chimes of doom.Alarm voltage and distance are by regulating R ₂Realize.Anti-theft feature passes through at R ₂Earth terminal is provided with plug switch K ₁With at R ₃To IC ₂Trigger end is provided with function switch K ₂, K ₁Plug form by wire loop, work as K ₂When being transformed into antitheft contact, plug inserts K ₁, be in antitheft user mode, transferred to or plug wires circuit breaking, then R as plug ₂Provide comparative voltage destroyed, promptly realize stolen warning.

Claims

1, a kind of antitheft protection against electric shock alarm comprises that housing, power supply, induced voltage unit (1), electric current amplify comparing unit (2) and optoacoustic alarm (3), is characterized in that induced voltage unit (1) is by diode D ₁, resistance R ₁And sensing chip (A) is formed resistance R ₁One termination sensing chip (A), another terminating diode D ₁Positive pole, diode D ₁Minus earth; Current amplification unit (2) is by integrated operational amplifier IC ₁With adjustable resistance R ₂Form, the forward input pin of integrated operational amplifier connects sensing chip (A), and oppositely input pin meets adjustable resistance R ₂Center tap, output pin connects optoacoustic alarm (3), its anodal pin and negative pole pin connect the positive pole and the negative pole of power supply respectively.