CN2755617Y - Electricity steel detector - Google Patents

Abstract

The utility model relates to a portable electricity stealing detector, which is mainly characterized in that the utility model is composed of a casing and a controlling circuit which is arranged in the casing, wherein the controlling circuit is composed of a monolithic computer, a circuit of a function indicating light, a selecting circuit for function keys, a pulse counting chip and a liquid-crystal display device, wherein the pulse counting chip is connected with an A/D converting chip through a special interface of the pulse counting chip; a pin of the pulse counting chip can be spliced with a pulse hand-hold device; the pin of the A/D converting chip can be spliced with a current calorimeter. The portable electricity stealing detector has the advantages of simple structure, simple operation and portability; the utility model tests, calculates and compares the electric energy of a power supply line and a line using electricity of a user to predicate that if the user steals electricity in the process of electricity use.

Description

Portable robber's electro-detection instrument

Technical field

The utility model relates to a kind of electricity consumption detecting instrument, particularly a kind of portable robber's electro-detection instrument.

Background technology

Often find that in electric power system individual customer has the phenomenon of stealing electricity in electric process, means are various, common some simple pilferage electrical phenomenas and method are easy to be examined out, but raising along with operating personnel's technical merit, the phenomenon of stealing electricity with high-tech approach is more and more, the electric weight of annual power supply department loss is very big, makes us the boring order and is tongue-tied and brings the loss of huge property to country, and management of power use environment is caused extremely bad influence.Because it is foundation with the watt-hour meter that power department is collected user's the electricity charge, and the user who steals electric behavior being arranged, all is to juggle things aspect the metering of watt-hour meter.As remove the short circuit hook of watt-hour meter, from ground wire, directly make means such as walking around watt-hour meter with electric line the record of watt-hour meter not conform to, thereby reach the purpose of stealing electricity with actual power consumption.

Detecting the method for stealing electricity at present is to detect with various means, as experienced electric power supervisor by loading condition and historical power consumption to user's consumer, factors such as wire installation situation, detect with a lot of equipment, must find reliable evidence can determine whether to stealing electric behavior.So not only consume the great amount of manpower financial resources, and consume a lot of times, cause increasing economic loss to country.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of simple in structure, easy and simple to handle, portable portable robber's electro-detection instrument, by testing and calculate comparison, conclude whether the user has the behavior of stealing electricity in electric process to user supply line with the electric flux of electric line.

The utility model solves its technical matters and takes following technical scheme to realize:

This portable robber's electro-detection instrument, constitute by the control circuit of installing in housing and the housing, it is characterized in that: control circuit is by single-chip microcomputer, and the functional indicator light circuit that links to each other with the corresponding special purpose interface of single-chip microcomputer, function key is selected circuit, the step-by-step counting chip, LCD is formed, the step-by-step counting chip is connected with an A/D conversion chip by its special purpose interface, this step-by-step counting pin of chip pulse hander of can pegging graft, the pin of this A/D conversion chip electric current card table of can pegging graft, single-chip microcomputer gives state and shows by being installed in functional indicator light circuit on the case panel via the result of calculation of the function input of function selecting key and number of pulses certificate and current data, give the numerical value demonstration by the LCD that is installed on the case panel.

And, be shaped on one on the described case panel and can insert the pulse input hole of pulse hander to the step-by-step counting chip.

And, be shaped on one on the described case panel and can insert the electric current input hole of electric current card table to the A/D conversion chip.

And described single-chip microcomputer is the HD4818 chip, and described functional indicator light circuit is made up of 9 light emitting diodes parallel with one another, and described function key selects circuit to be made up of 16 current-limiting resistances parallel with one another and corresponding 16 function key switch.

And described step-by-step counting chip is the 89C51 chip.

And described A/D conversion chip is the ADC0809 chip.

The utility model compared with prior art has significant advantage and beneficial effect, this detector is simple in structure, easy and simple to handle, adopt LCD, can specifically show electric current, voltage, COS Φ and performance number, the ratio of the performance number that calculate on the performance number of calculating when this road of pulse hander (electricity consumption side) and this road of electric current card table (supply side) can produce difference, the precision of the ratio of two values exceeds at 5% o'clock, and during the performance number that the performance number that calculate on this road of electric current card table calculates greater than this road of pulse hander, there is the electric behavior of stealing in the circuit that draws this electricity consumption user that can affirm.This detector cost is low simultaneously, volume is little, in light weight, easy to carry.

Description of drawings

Fig. 1 is a profile synoptic diagram of the present utility model;

Fig. 2 is the control circuit theory diagram;

Fig. 3 is control circuit figure;

Fig. 4 tester case panel synoptic diagram.

Embodiment

Below in conjunction with accompanying drawing and preferred embodiment, embodiment, structure, feature and effect thereof that foundation the utility model is provided, describe in detail as after.

See also Fig. 1 to Fig. 4, portable robber's electro-detection instrument comprises housing 1, and control circuit is installed in the housing.The supply socket 6 that is electrically connected with control circuit is installed on the case panel 12, power switch 4, function key 7, functional indicator light 3 and LCD 2, wherein control circuit comprises single-chip microcomputer, functional indicator light circuit, function key selection circuit, A/D conversion chip and step-by-step counting chip; Single-chip microcomputer comprises a HD4818 chip; The functional indicator light circuit is made up of 9 light emitting diodes parallel with one another, and the termination direct supply of light emitting diode LD1 to LD9, the other end connect the pin 1 of chip HD4818 successively to pin 9; Function key selects circuit to comprise that 16 branch roads that are in series by current-limiting resistance and function key switch parallel with one another form, the termination direct supply of current-limiting resistance R1 to R16, one tunnel connection function bond switching K1 to K16 successively of the other end, another road connects the pin 10 of chip HD4818 successively to pin 25, the pin 29 of chip HD4818 connects direct supply, and pin 30 to pin 37 connects the pin 1 of LCD successively to pin 8; The electric current input hole 9 that places the outer electric current card table 11 of housing to install on case panel connects pin 1, the pin 2 of A/D conversion chip ADC0809, current signal is converted to digital signal, chip ADC0809 pin 3 connects direct supply, pin 4 to pin 6 connects the pin 1 of step-by-step counting chip 89C51 successively to pin 3, the pin 4 of chip 89C51 connects direct supply, pin 5 to the pin 26 of pin 7 order sheet machine chip HD4818 successively to pin 28; Place case panel pulse hander 10 outer and the pulse input hole 8 of can pegging graft to comprise a circuit that is in series by resistance R and outer manually K switch, its resistance R one termination direct supply, a road of the other end connects outer manually K switch, another road is equipped with the pin 8 that a pulse input hole meets step-by-step counting chip 89C51 on case panel, press hand switch, to pulse signal of step-by-step counting chip input.

The tester magnitude of voltage has 100V, 220V and three shelves of 400V and can " subtract " " adding slowly " soon by " adding soon " according to on-the-spot actual voltage value and " subtracts " the key adjusting slowly; COS Φ value is that Standard Selection is calculated with " 0.85,0.90,0.95 " three definite values; Input current is gone into by electric current card table direct " card ", and tester is used electric energy according to magnitude of voltage, COS Φ, the range of current of user's input $\mathrm{KWh}1=\sqrt{3}\mathrm{UICOS\Φ}$ Calculate actual power consumption figures (U: line voltage, I; Line current);

Tester changes than being accepted values such as 300 commentaries on classics, 325 commentaries on classics, 450 commentaries on classics, 600 commentaries on classics, 720 commentaries on classics, 800 commentaries on classics, 900 commentaries on classics, 1000 commentaries on classics, select input by " changeing ratio " key, as reality change than and tester is commonly used changes than different, " subtract " " adding slowly " soon with " adding soon " and " subtract " the key adjusting slowly; Manually pulse is imported both field check personnel and is held " underworld " that the pulse hander observes the watt-hour meter dial plate by eyes and forward positive center to, hand is by pulse hander switch, grade in an imperial examination five " underworlds " turns over then, press pulse hander switch once more when forwarding the center to, (change ratio * t by changeing electric flux KWh2=3600 * 1000/ of comparing and calculating the subscriber's meter meter interpulse period _i) t _iBe (unit: second) interpulse period.

The electric current that tester is measured electric current Ka Biaoka, the actual measurement electric energy KWh1 that calculates compares than the watt-hour meter that calculates electric weight KWh2 at this moment with manual pulse hander input commentaries on classics, many as KWh1＞KWh2 or KWh1＜KWh2, being judged to be electricity consumption has problem, has the caution red light bright on the tester; As KWh1 ≌ KWh2, the difference precision illustrates that electricity consumption is normal in 5%, and green light is bright on the tester.

Measuring method: with the pulse input end on the shielding line insertion tester case panel of tape pulse hander, take out electric current card table, regulate measurement range, tester choosing two current gears of 5A, 250A wherein, another root shielding line inserts current input terminal on the tester case panel after connecting electric current card table, electric current card table is stuck on the table buttock line of watt-hour meter to be measured, turn on the power switch 4 then, press " resetting " key, liquid crystal display displays " 00000.00 " is according to the numerical value of field condition input voltage, electric current, commentaries on classics ratio, COS Φ; Hold the pulse hander and watch the interval time that the watt-hour meter dial plate calculates 5 pulses attentively, begin to clock and press switch key, tester sends long and shows the beginning of clocking, when arrive in 5 interpulse periods, press switch key once more, tester sends three minors and shows the end of clocking, and presses " result " key at last, draws measurement result.When the test result pilot lamp is green, illustrate that the electricity consumption situation is normal, when the test result pilot lamp is red, illustrate that multiplexing electric abnormality promptly has the electric behavior of robber.

The power supply of tester is 6 volts of rechargeable nickel-hydrogen batteries, is full of the electricity sustainable work in back 30 hours, and each duration of charging can be 8～24 hours, when needs charge, with power lead the 220V power supply is connected to supply socket 6 on the case panel, charging indicator light 5 is bright, shows charging.

Principle of work is: portable robber's electro-detection instrument, is linked to each other with housing with signal wire as the signals collecting sensor by pulse hander and electric current card table, and singlechip chip is arranged in housing, and the outer A/D conversion chip that is with at chip has the step-by-step counting chip.Because the commentaries on classics of every kind of watt-hour meter is than different, so in the middle of singlechip chip, set in advance the commentaries on classics ratio of all watt-hour meter, if the commentaries on classics that does not have in chip ratio, this instrument can on-the-spot input will be surveyed the commentaries on classics ratio of watt-hour meter, pulse signal is the number of turns of being changeed in the regular hour according to watt-hour meter by a pulse hander, when watt-hour meter whenever turns around, the pulse hander just clicks, whenever click switch, just be dealt into pulse of chip, chip finished up to the pulse input according to the umber of pulse and the corresponding time (promptly when pressing first pulse, chip is the opening entry time) of record.After the pulse input finished, singlechip chip just began to calculate the watt-hour meter power of this moment, electric current, voltage.

Other one group of electric current card table is received a certain of circuit and is gone up mutually, current signal is input on the A/D conversion chip, conversion becomes digital signal through A/D, read in and calculate by single-chip microcomputer again, according to measured current, voltage, COS Φ value, calculate a performance number, and then compare with performance number that the pulse hander calculates, when the performance number that calculate on this road of pulse hander is compared with the value that calculate on this road of electric current card table, the ratio of the calculated value of two-way can produce difference, the precision of the ratio of two values is considered as normal electricity consumption within 5%.

When the ratio of two values exceeds 5%, and the performance number calculated of this road of electric current card table calculate greater than this road of pulse hander performance number the time, there is the electric behavior of stealing in the circuit that draws this electricity consumption user that can affirm.

Because the performance number representative that calculate on this road of pulse hander is the energy value that reflects on watt-hour meter, the electric flux that the user who is the user by the watt-hour meter record was consumed in the unit interval, and the performance number that calculate on this road of electric current card table reflection is the actual electrical energy that consumes at this moment in the supply line.The user has when stealing electric behavior, and it is mainly taken measures at the record of watt-hour meter, so the value in the supply line during greater than the value that reflects on the watt-hour meter, this just shows that the user has the suspicion of robber's electricity.Again through confirming, just can draw whether to steal the conclusion of electricity repeatedly.

Claims (6)

1. portable robber's electro-detection instrument, constitute by the control circuit of installing in housing and the housing, it is characterized in that: control circuit is by single-chip microcomputer, and the functional indicator light circuit that links to each other with the corresponding special purpose interface of single-chip microcomputer, function key is selected circuit, the step-by-step counting chip, LCD is formed, the step-by-step counting chip is connected with an A/D conversion chip by its special purpose interface, this step-by-step counting pin of chip pulse hander of can pegging graft, the pin of this A/D conversion chip electric current card table of can pegging graft, single-chip microcomputer gives state and shows by being installed in functional indicator light circuit on the case panel via the result of calculation of the function input of function selecting key and number of pulses certificate and current data, give the numerical value demonstration by the LCD that is installed on the case panel.

2. portable robber's electro-detection instrument according to claim 1 is characterized in that: be shaped on one on the described case panel and can insert the pulse input hole of pulse hander to the step-by-step counting chip.

3. portable robber's electro-detection instrument according to claim 1 is characterized in that: be shaped on one on the described case panel and can insert the electric current input hole of electric current card table to the A/D conversion chip.

4. portable robber's electro-detection instrument according to claim 1, it is characterized in that: described single-chip microcomputer is the HD4818 chip, described functional indicator light circuit is made up of 9 light emitting diodes parallel with one another, and described function key selects circuit to be made up of 16 current-limiting resistances parallel with one another and corresponding 16 function key switch.

5. portable robber's electro-detection instrument according to claim 1 and 2, it is characterized in that: described step-by-step counting chip is the 89C51 chip.

6. according to claim 1 or 3 described portable robber's electro-detection instrument, it is characterized in that: described A/D conversion chip is the ADC0809 chip.

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