CN105116278B - A kind of electric energy meter is visited one house after another wire searcher - Google Patents

A kind of electric energy meter is visited one house after another wire searcher Download PDF

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Publication number
CN105116278B
CN105116278B CN201510625812.XA CN201510625812A CN105116278B CN 105116278 B CN105116278 B CN 105116278B CN 201510625812 A CN201510625812 A CN 201510625812A CN 105116278 B CN105116278 B CN 105116278B
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module
housing
power
input
current
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CN105116278A (en
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罗敏
田斌
雷彦彪
罗文琦
李莉
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罗敏
田斌
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Abstract

Visited one house after another wire searcher, including housing the invention discloses a kind of electric energy meter, its housing appearance is provided with capacitor switching indicator lamp, display screen, control source interface and current sensor interface;CPU processing centers, metering module, power module are provided with housing;The fling-cut switch being further connected between the live wire and zero line of 220V alternating currents in capacitor switching module, capacitor switching module is arranged on outside housing, and electric capacity and relay are arranged in housing.The present invention is in the case where that need not power off, so that it may calculate current voltage, electric current, frequency, active power, power factor equivalence, then manual switching switch, change the capacitance in input loop, so that on-site verification inlet wire and the loop correctness of outlet;And amperometry, the impedance analysis of operating loop can also be carried out, leaky is detected whether, improves operating efficiency.

Description

A kind of electric energy meter is visited one house after another wire searcher
Technical field
Field of tool is detected the present invention relates to electric power, and in particular to a kind of electric energy meter is visited one house after another wire searcher.
Background technology
Resident concentrate electric energy meter traditional line inspection method, will all electric energy meters incoming power disconnect, then use general-purpose Table measures whether the inlet wire of every piece of electric energy meter and outlet are the same circuit.This line inspection method needs deenergization, can be to The resident of electricity consumption causes the trouble powered off suddenly, influences the service quality of power supply, and is unable to on-site verification inlet wire and outlet Current compliance, it is impossible to check whether there is the generation of tax evasion electrical phenomena.
The content of the invention
The deficiency existed for above-mentioned prior art, power-off is not required to and vdiverse in function it is an object of the invention to provide a kind of Electric energy metrical is visited one house after another wire searcher.
The technical scheme is that:A kind of electric energy meter is visited one house after another wire searcher, including housing, it is characterised in that housing Appearance is provided with capacitor switching indicator lamp, display screen, control source interface and current sensor interface;CPU is provided with housing Processing center, metering module, power module;The signal input part connection metering module of the CPU processing centers, in CPU processing The signal output part connection display screen of the heart;The metering module includes metering module CPU, A/D converter, buffer amplifier, taken The signal input part of sample circuit, wherein metering module CPU connects the output end of A/D converter, and the input of A/D converter is divided to two Road connects the output end of two buffer amplifiers;Sample circuit is divided into current sampling circuit and voltage sample circuit, two bufferings The input of amplifier connects the output end of current sampling circuit and voltage sample circuit respectively, and wherein current sampling circuit is defeated Enter end connection current sensor interface, the input connection control source interface of voltage sample circuit;The input of power module 220V alternating currents are connect, the output end of power module connects CPU processing centers, metering module, display screen respectively;In 220V alternating currents Capacitor switching module is further connected between live wire and zero line, capacitor switching module includes fling-cut switch, electric capacity, relay, wherein throwing Cut pass to be arranged on outside housing, electric capacity and relay are arranged in housing.
Above-mentioned CPU processing centers are the core components of whole wire searcher, its act on be will be being transmitted from metering module, Handled, and shown on a display screen by signals such as the voltage of computing, electric current, power, power factors.
It is real-time display voltage, electric current, active power, power factor value and change curve that above-mentioned display screen, which is acted on, real-time Impedance.
Above-mentioned buffer amplifier, plays drive amplification, has increase antijamming capability concurrently.
Above-mentioned current sampling circuit and voltage sample circuit are routine sampling circuit, and wherein voltage sampling is using resistance point Input a/d converter again after platen press, buffered amplifier;Current sampling is buffered to put using first through current-voltage conversion circuit Input a/d converter again after big device.
Above-mentioned power module is AC-DC isolating converter, and specifications and models are FAD5-0505-WFCI.Its effect is Direct-current working volts are provided for CPU processing centers, display screen, metering module etc..
It is an advantage of the invention that:The present invention in the case where that need not power off, by metering module calculate current voltage, Electric current, frequency, active power, power factor are equivalent, then are switched by manual switching, change the capacitance in input loop, from And on-site verification inlet wire and the loop correctness of outlet;And amperometry, the impedance analysis of operating loop can also be carried out, is detected Whether there is leaky, improve operating efficiency.
Brief description of the drawings
Fig. 1 is external structure schematic diagram of the invention;
Fig. 2 is internal structure schematic diagram of the invention;
Fig. 3 is operation principle module map of the present invention;
Fig. 4 is the fundamental diagram of current sampling circuit of the present invention;
Fig. 5 is the fundamental diagram of voltage sample circuit of the present invention;
Fig. 6 is operation principle circuit diagram of the present invention;
In figure:1st, housing, 2, capacitor switching indicator lamp, 3, display screen, 4, CPU processing centers, 5, metering module, 5.1, meter Measure module CPU, 5.2, A/D converter, 5.3, buffer amplifier, 5.4, current sampling circuit, 5.5, voltage sample circuit, 6, electricity Flow sensor interface, 7, control source interface, 8, power module, 9, capacitor switching module, 9.1, fling-cut switch, 9.2, relay Device, 9.3, electric capacity.
Embodiment
In conjunction with accompanying drawing, the invention will be further described.
Referring to Fig. 1-Fig. 3, the appearance of housing 1 is provided with capacitor switching indicator lamp 2, display screen 3, control source interface 7 and electricity CPU processing centers 4, metering module 5, power module 8 are provided with flow sensor interface 6, housing 1;The CPU processing centers 4 Signal input part connection metering module 5, CPU processing centers 4 signal output part connection display screen 3;The metering module 5 is wrapped Include metering module CPU5.1, A/D converter 5.2, buffer amplifier 5.3, the signal of sample circuit, wherein metering module CPU5.1 Input connects the output end of A/D converter 5.2, and the input of A/D converter 5.2 is divided to two-way to connect two buffer amplifiers 5.3 output end;Sample circuit is divided into current sampling circuit 5.4 and voltage sample circuit 5.5, two buffer amplifier circuits 5.3 Input connect the output end of current sampling circuit 5.4 and voltage sample circuit 5.5, wherein current sampling circuit 5.4 respectively Input termination current sensor interface 6, the input termination control source interface 7 of voltage sample circuit 5.5;Power module 8 Input termination 220V alternating currents, the output end of power module 8 connects CPU processing centers 4, metering module 5, display screen 3 respectively; Capacitor switching module 9 is further connected between the live wire and zero line of 220V alternating currents, capacitor switching module 9 includes fling-cut switch 9.1, electricity Hold 9.3, relay 9.2, wherein fling-cut switch 9.1 is arranged on outside housing 1, and electric capacity 9.3 and relay 9.2 are arranged in housing 1. The model LJQX-13F-2Z-220VAC of relay 9.2, contact capacity is 10A, has opened the effect of protection button switch.
Wherein display screen 3, CPU processing centers 4, metering module CPU5.1, A/D converter 5.2, buffer amplifier 5.3, electricity The equal buyable of source module 8.
Metering module 5 is the important component of whole instrument, energy metered voltage, electric current, power, power factor (PF), frequency etc..Meter When measuring the work of module 5, control source interface 7 of the voltage signal through wire searcher between the live wire and zero line of 220V alternating currents accesses electricity Press the input of sample circuit 5.5;And current signal is then connect by current sensor of the current sensor output through wire searcher The input of current sampling circuit 5.4 is accessed at mouth 6, after voltage, electric current are separately sampled, the buffering of buffer amplifier 5.3 are delivered to and puts Greatly, then by 24 A/D converters 5.2 become data signal, be sent to metering module CPU 5.1 and carry out calculation process, then convey To CPU processing centers 4.
Referring to Fig. 4, Fig. 5, current sampling circuit 5.4 and voltage sample circuit 5.5 are routine sampling circuit.Wherein electric current Sampling uses current-voltage conversion circuit, then input a/d converter 5.2 again after buffered amplifier 5.3;Because to measure several peaces Train to tens amperes of alternating current, it is necessary to be transformed into equivalent small-signal alternating current, otherwise can not measure, therefore Using through over-current sensor(Current sensor uses clamp on amperemeter, 2000:1 no-load voltage ratio, with 0.5 class precision), by one Secondary side high current is changed into secondary side low current signal, figure,, wherein ui (t) The current equivalence voltage exported for sample circuit, RL is load resistance, and Ki is the no-load voltage ratio of current transformer.And voltage sampling is used Input a/d converter 5.2 again after electric resistance partial pressure method, buffered amplifier 5.3, because tested voltage is 220V, it is necessary to pass through partial pressure Device is changed into equivalent small voltage signal, and divider selects resistor network, with good linearity, low cost and other advantages.
Referring to Fig. 6, when not by fling-cut switch 8.1, the contact of relay 8.2 is disconnected, and electric capacity 8.3 is not accessed in circuit, and I= I1, when pressing fling-cut switch 8.1, just by the closing of contact of relay 8.2, electric capacity 8.3 is switched to current circuit, I=I1+IC , ICFor capacity current, voltage U and electric current I phase angle change, and power factor (PF) COS Ф then undergo mutation.It is former using this Reason, realizes the function of the line inspection, power factor (PF) mutation is looked into, and connections are correct, and power factor (PF) is not undergone mutation, then by the line inspection Road wiring error.
" electric energy meter visit one house after another wire searcher " of the present invention when in use, need to use the accessories such as current sensor, jointing clamp. During normal work, by nucleus module CPU processing centers 4 by voltage transmitted from metering module 5, to pass through computing, electric current, The signals such as power, power factor are handled, and show that corresponding data are checked for user on display screen 3, when user presses electricity When holding fling-cut switch 8.1, just by the closing of contact of relay 8.2, electric capacity 8.3 is switched to current circuit, CPU processing centers 4 are remembered The operation power factor before electric capacity 8.3 is put into is recorded, within 3 seconds, the power factor value after input electric capacity 8.3 is re-recorded, If the power factor change value of front and rear record is less than 0.1, buzzing 2 seconds points out the current test result of user's current loop to go out Mistake, expression is not belonging to the same circuit, can again test and be confirmed.
Because the current sensor precision of the wire searcher is high(For 0.5 grade), whether the electric power meter of user accurate(It is few Metering, many meterings), using the live live testing of the wire searcher, what the performance number and electric energy meter tested by wire searcher were shown Performance number, which compares, to be judged.The former is more than the latter, and then electric energy meter is measured less(Stealing), the former counts more less than the latter then electric energy meter Amount(Failure).

Claims (2)

  1. Wire searcher, including housing 1. a kind of electric energy meter is visited one house after another, it is characterised in that housing appearance is provided with capacitor switching instruction Lamp, display screen, control source interface and current sensor interface;CPU processing centers, metering module, power supply are provided with housing Module;The signal input part connection metering module of the CPU processing centers, the signal output part connection display of CPU processing centers Screen;The metering module includes metering module CPU, A/D converter, buffer amplifier, sample circuit, wherein metering module CPU Signal input part connect the output end of A/D converter, the input of A/D converter be divided to two-way two buffer amplifiers of connection Output end;Sample circuit is divided into current sampling circuit and voltage sample circuit, and the input of two buffer amplifiers is connected respectively The input connection current sensor of the output end of current sampling circuit and voltage sample circuit, wherein current sampling circuit connects Mouthful, the input connection control source interface of voltage sample circuit;The input termination 220V alternating currents of power module, power module Output end connect CPU processing centers, metering module, display screen respectively;It is further connected between the live wire and zero line of 220V alternating currents Capacitor switching module, capacitor switching module includes fling-cut switch, electric capacity, relay, and wherein fling-cut switch is arranged on outside housing, electricity Hold and relay is arranged in housing.
  2. The wire searcher 2. electric energy meter according to claim 1 is visited one house after another, it is characterised in that the power module becomes for exchange DC-isolation converter.
CN201510625812.XA 2015-09-28 2015-09-28 A kind of electric energy meter is visited one house after another wire searcher Active CN105116278B (en)

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CN105116278B true CN105116278B (en) 2017-10-24

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106093692A (en) * 2016-05-27 2016-11-09 国家电网公司 The method and device that detection electric energy meter is visited one house after another
CN106199318B (en) * 2016-06-23 2018-12-25 潍坊五洲浩特电气有限公司 A kind of Intelligent line inspection instrument applied to ammeter box
CN109375043A (en) * 2018-09-30 2019-02-22 国网福建省电力有限公司南平供电公司 One kind is visited one house after another detection system and its application method
CN109444789A (en) * 2018-10-09 2019-03-08 国网湖北省电力有限公司宜昌供电公司 A kind of Electricity customers and electric energy meter relation recognition device and method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7974794B2 (en) * 2007-12-06 2011-07-05 Toshiba Toko Meter Systems Co., Ltd. Electric energy meter
CN201955466U (en) * 2011-01-20 2011-08-31 安徽省电力公司蚌埠供电公司 Multifunctional electric apparatus parameter test instrument
CN203773002U (en) * 2014-03-21 2014-08-13 国家电网公司 Wire connection correctness detector for electric energy metering device
CN103869210B (en) * 2014-03-21 2017-05-10 国家电网公司 Wiring right and wrong detector for electric energy metering device in power-off state
CN204964670U (en) * 2015-09-28 2016-01-13 罗敏 Electric energy strapping table inspection of a line appearance of visiting one house after another

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