CN204422616U - There is the electrical energy metering tank of anti-stealing electricity function - Google Patents

Abstract

Have the electrical energy metering tank of anti-stealing electricity function, belong to the anti-electricity-theft field of electric energy, the utility model is for solving Problems existing in existing process of opposing electricity-stealing.The utility model comprises microprocessor, SMS module and unpacking detecting unit; The unpacking signal output part of detecting unit of unpacking is connected with the unpacking signal input part of microprocessor, the instruction output end of microprocessor is connected with the command input of SMS module, and unpacking information is sent to designated mobile phone terminal with note form by antenna by SMS module; + 6V direct supply is powered for microprocessor and unpacking detecting unit simultaneously; When batch meter normally sealed or locked state time, chamber door is closed, and miniature elastic button SN is off state; Once be pried open by improper means by people, chamber door is opened, and miniature elastic button SN changes closure state into, triode ON, and monostalbe trigger upset enters transient state, and export high level, KA coil obtains electric, and its normally opened contact closes, the audible alarm of loudspeaker BL high frequency.

Description

Electric energy metering box with anti-theft function

technical field

The utility model relates to an electric energy metering box, belonging to the electric energy anti-stealing field.

Background technique

The watt-hour meter is an instrument for measuring electric energy and is the basis for charging electricity charges. According to analysis, electricity theft is basically achieved by attacking the watt-hour meter. The main methods of stealing electricity include undervoltage method stealing electricity, undercurrent method stealing electricity, Stealing electricity by phase-shifting method and stealing electricity by differential expansion method, etc., but no matter what kind of electricity stealing method, the electricity thief must contact the primary or secondary equipment of the metering device (watt-hour meter) when committing a crime. Therefore, in order to counter the theft Electricity, the power sector has adopted a variety of protective measures, but the most direct and effective measure is to install metering boxes, seal and lock them, so that users cannot directly touch the watt-hour meters. For this reason, the power department has designed a special tamper-proof lead seal, so that electricity thieves will leave evidence when they open the box door to steal electricity. In order to further prevent such electricity thieves, the extreme measure taken is to weld the door of the metering box. It can be used at one time, and it is not convenient for normal maintenance.

Contents of the invention

The purpose of the utility model is to solve the problems existing in the existing anti-stealing process and provide an electric energy metering box with the function of anti-stealing.

The electric energy metering box with anti-stealing function described in the utility model includes a microprocessor, an SMS module and an unpacking detection unit; the unpacking signal output end of the unpacking detection unit is connected with the unpacking signal input end of the microprocessor , the command output terminal of the microprocessor is connected with the command input terminal of the SMS module, and the SMS module sends the unpacking information to the designated mobile phone terminal through the antenna in the form of a short message; the +6V DC power supply supplies power for the microprocessor and the unpacking detection unit at the same time;

The unpacking detection unit includes NE555 time base integrated circuit, miniature elastic button SN, resistor R1, resistor R2, sliding rheostat Rp1, electrolytic capacitor C1, capacitor C2, diode D1, NPN transistor VT1, intermediate relay KA and horn BL; miniature elastic button SN is set on the door of the metering box. When the door is closed, the micro elastic button SN is in the disconnected state; when the box door is opened, the micro elastic button SN is in the closed state;

The +6V DC power supply is simultaneously connected to a fixed end of the sliding rheostat Rp1 and its movable end, one end of the resistor R1, one end of the resistor R2, pin 4 and pin 8 of the NE555 time base integrated circuit and the positive power supply terminal of the speaker BL;

The other fixed end of the sliding rheostat Rp1 is simultaneously connected to one end of the miniature elastic button SN and the base of the NPN transistor VT1; the collector of the NPN transistor VT1 is simultaneously connected to the other end of the resistor R1 and pin 2 of the NE555 time base integrated circuit; the NE555 time base Pin 7 of the integrated circuit is connected to its own pin 6, the other end of the resistor R2 and the positive pole of the electrolytic capacitor C1; pin 5 of the NE555 time-base integrated circuit is connected to one end of the capacitor C2; pin 3 of the NE555 time-base integrated circuit is connected to the diode D1 at the same time Negative pole, one end of the intermediate relay KA coil and the unpacking signal input end of the microprocessor; one end of the intermediate relay KA normally open contact is connected to the negative power supply terminal of the speaker BL;

The power ground terminal of the microprocessor is simultaneously connected to the other end of the normally open contact of the intermediate relay KA, the other end of the coil of the intermediate relay KA, the positive pole of the diode D1, pin 1 of the NE555 time base integrated circuit, the other end of the capacitor C2, and the electrolytic capacitor The negative pole of C1, the emitter pole of NPN transistor VT1 and the other end of the miniature elastic button SN are grounded.

The utility model has the advantages: the electric energy metering box with the anti-stealing function described in the utility model is improved on the basis of the original equipment, and the structure is simple and reliable. Electrical behavior is nipped in the bud.

Description of drawings

Fig. 1 is a structural schematic diagram of the electric energy metering box with anti-stealing function described in the utility model.

Detailed ways

Specific embodiment one: the present embodiment is described below in conjunction with Fig. 1, and the electric energy metering box with anti-theft function described in the present embodiment includes a microprocessor 1, an SMS module 2 and an unpacking detection unit 3; an unpacking detection unit The unpacking signal output terminal of 3 is connected with the unpacking signal input terminal of microprocessor 1, the command output terminal of microprocessor 1 is connected with the command input terminal of SMS module 2, and SMS module 2 passes the unpacking information in the form of short message through antenna Send to the designated mobile phone terminal; +6V DC power supplies power to the microprocessor 1 and the unpacking detection unit 3 at the same time;

Unpacking detection unit 3 includes NE555 time base integrated circuit, miniature elastic button SN, resistance R1, resistance R2, sliding rheostat Rp1, electrolytic capacitor C1, capacitor C2, diode D1, NPN transistor VT1, intermediate relay KA and speaker BL; miniature elastic The button SN is set on the door of the metering box. When the door is closed, the micro elastic button SN is in the disconnected state; when the door is opened, the micro elastic button SN is in the closed state;

The +6V DC power supply is simultaneously connected to a fixed end of the sliding rheostat Rp1 and its movable end, one end of the resistor R1, one end of the resistor R2, pin 4 and pin 8 of the NE555 time base integrated circuit and the positive power supply terminal of the speaker BL;

The other fixed end of the sliding rheostat Rp1 is simultaneously connected to one end of the miniature elastic button SN and the base of the NPN transistor VT1; the collector of the NPN transistor VT1 is simultaneously connected to the other end of the resistor R1 and pin 2 of the NE555 time base integrated circuit; the NE555 time base Pin 7 of the integrated circuit is connected to its own pin 6, the other end of the resistor R2 and the positive pole of the electrolytic capacitor C1; pin 5 of the NE555 time-base integrated circuit is connected to one end of the capacitor C2; pin 3 of the NE555 time-base integrated circuit is connected to the diode D1 at the same time Negative pole, one end of the coil of the intermediate relay KA and the unpacking signal input end of the microprocessor 1; one end of the normally open contact of the intermediate relay KA is connected to the negative power supply terminal of the speaker BL;

The power ground terminal of the microprocessor 1 is simultaneously connected to the other end of the normally open contact of the intermediate relay KA, the other end of the coil of the intermediate relay KA, the positive pole of the diode D1, pin 1 of the NE555 time base integrated circuit, the other end of the capacitor C2, the electrolytic The negative pole of the capacitor C1, the emitter of the NPN transistor VT1 and the other end of the miniature elastic button SN are grounded.

The SMS module 2 is realized by a chip of the type TC351.

Working principle: When the metering box is normally sealed or locked, the box door is closed, and the miniature elastic button SN is in the off state; at this time, VT1 is cut off, and its collector is connected to pin 2 of the NE555 time base integrated circuit, which is high level, the monostable trigger is in a stable state, pin 3 of the NE555 time base integrated circuit outputs a low level, the KA coil is not powered, the BL does not work, the microprocessor 1 does not receive instructions, and does not drive the SMS module 2 to send text messages.

Once it is pried open by abnormal means, the box door is opened, the miniature elastic button SN changes to the closed state, the +6V DC power supply injects base current into the base of the NPN transistor VT1 through the sliding rheostat Rp1, and the NPN transistor VT1 is quickly turned on , that is, input a low-level trigger signal to pin 2 of the NE555 time-base integrated circuit, the monostable flip-flop enters a transient state, and the 3-pin of the NE555 time-base integrated circuit outputs a high level, the KA coil is energized, and its normally open When the contact is closed, the loudspeaker BL will give a high-frequency sound alarm, and the loudspeaker BL can choose a piezoelectric tweeter. The on-site alarm is used to warn the parties not to continue stealing electricity, and to eliminate the accident in the bud; at the same time, the microprocessor 1 receives a high level as a trigger command, and drives the SMS module 2 to send a text message to the designated mobile terminal, so that the administrator first Know at any time which community user is abnormal, so as to grasp the first-hand information and deal with electricity theft in time.

Utilize microprocessor 1 and SMS module 2 to carry out short message output and relate to hardware and related program all are prior art, can directly buy on the market, is not the focus of protection of the utility model, and the utility model utilizes this prior art to carry out Remote alarm.

Claims (2)

1. have the electrical energy metering tank of anti-stealing electricity function, it is characterized in that, it comprises microprocessor (1), SMS module (2) and unpacking detecting unit (3); The unpacking signal output part of unpacking detecting unit (3) is connected with the unpacking signal input part of microprocessor (1), the instruction output end of microprocessor (1) is connected with the command input of SMS module (2), and unpacking information is sent to designated mobile phone terminal with note form by antenna by SMS module (2); + 6V direct supply is microprocessor (1) and unpacking detecting unit (3) power supply simultaneously;

Detecting unit (3) of unpacking comprises NE555 time-base integrated circuit, miniature elastic button SN, resistance R1, resistance R2, slide rheostat Rp1, electrochemical capacitor C1, electric capacity C2, diode D1, NPN triode VT1, auxiliary reclay KA and loudspeaker BL; Miniature elastic button SN is arranged on the chamber door of batch meter, and when chamber door closes, miniature elastic button SN is off state; When chamber door is opened, miniature elastic button SN is closure state;

+ 6V direct supply connects the positive pole power supply terminal of the stiff end of slide rheostat Rp1 and movable end thereof, one end of resistance R1, one end of resistance R2,4 pin of NE555 time-base integrated circuit, 8 pin and loudspeaker BL simultaneously;

Another stiff end of slide rheostat Rp1 connects one end of miniature elastic button SN and the base stage of NPN triode VT1 simultaneously; The collector other end of contact resistance R1 and 2 pin of NE555 time-base integrated circuit simultaneously of NPN triode VT1; 7 pin of NE555 time-base integrated circuit connect self 6 pin, the other end of resistance R2 and the positive pole of electrochemical capacitor C1 simultaneously; 5 pin of NE555 time-base integrated circuit connect one end of electric capacity C2; 3 pin of NE555 time-base integrated circuit connect the unpacking signal input part of the negative pole of diode D1, one end of auxiliary reclay KA coil and microprocessor (1) simultaneously; One end of auxiliary reclay KA normally opened contact connects the negative pole power supply terminal of loudspeaker BL;

The power supply ground end of microprocessor (1) connects the other end of the other end of auxiliary reclay KA normally opened contact, the other end of auxiliary reclay KA coil, the positive pole of diode D1,1 pin of NE555 time-base integrated circuit, the other end of electric capacity C2, the negative pole of electrochemical capacitor C1, the emitter of NPN triode VT1 and miniature elastic button SN simultaneously, and ground connection.

2. have the electrical energy metering tank of anti-stealing electricity function according to claim 1, it is characterized in that, SMS module (2) employing model is that the chip of TC351 realizes.