CN204287268U - Anti-error intelligent electric meter of checking meter - Google Patents
Anti-error intelligent electric meter of checking meter Download PDFInfo
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- CN204287268U CN204287268U CN201420774115.1U CN201420774115U CN204287268U CN 204287268 U CN204287268 U CN 204287268U CN 201420774115 U CN201420774115 U CN 201420774115U CN 204287268 U CN204287268 U CN 204287268U
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- intelligent electric
- power supply
- wiring board
- meter
- shell
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- 101100489717 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) GND2 gene Proteins 0.000 claims abstract description 18
- 238000001914 filtration Methods 0.000 claims abstract description 13
- 101100489713 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) GND1 gene Proteins 0.000 claims abstract description 11
- 238000007667 floating Methods 0.000 claims abstract description 9
- 230000035699 permeability Effects 0.000 claims abstract description 8
- 239000000696 magnetic material Substances 0.000 claims abstract description 6
- 239000011324 bead Substances 0.000 claims abstract description 5
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- HPDFFVBPXCTEDN-UHFFFAOYSA-N copper manganese Chemical compound [Mn].[Cu] HPDFFVBPXCTEDN-UHFFFAOYSA-N 0.000 description 11
- 238000005070 sampling Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000739 chaotic effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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Abstract
The utility model provides a kind of anti-error intelligent electric meter of checking meter, and comprises shell, is located at the isolating transformer T1 in shell and wiring board; The input end of isolating transformer T1 taps into line terminals, output end wiring road plate; Shell adopts permeability magnetic material, and outer casing inner wall scribbles conductive film; Conductive film on outer casing inner wall is for connecting on-the-spot ground wire; The equal connection line plate of the earth terminal of digit chip digitally GND2 on wiring board, digit chip is all located in electrostatic shielding cover, described electrostatic shielding cover connection line plate digitally GND2; The power supply unit that circuit on wiring board also comprises power supply decoupling filtering circuit and powers for wiring board; The output terminal of isolating transformer T1 connects power supply unit input end by power supply decoupling filtering circuit, the earth terminal connection line plate GND1 in analog of power supply unit; Wiring board in analog GND1 and wiring board digitally GND2 magnetic bead be connected; The inlet wire of this intelligent electric meter adopts Floating ground shield structure.The stable reading of the feedback of this intelligent electric meter is accurate.
Description
Technical field
The utility model relates to electric system, and especially one can jamming-proof intelligent electric meter.
Background technology
Intelligent electric meter is power marketing department instrumentation, time platform district concentrator is checked meter in the past, often can copy the ammeter information in other districts, causes data statistics chaotic.In same switchgear building Nei Tai district close together, same frequency carrier signal by transformer and high-voltage power line each interval crosstalk, cause platform district success ratio of checking meter very low. there is carrier wave island phenomenon in part platform district simultaneously, and namely concentrator cannot be checked meter, and thus needs by repeater transmission of signal.
Intelligent electric meter is just among transformation like a raging fire, and " all standing, entirely gather " of low-voltage customer all will realize in 4-5, along with progressively realizing of automatically gathering of low pressure to be checked meter greatly reducing power supply department the input of human and material resources.But find in actual use, due to the three-phase equipment that low-voltage platform area is run for some 24 hours, as: high frequency water pump etc., meter reading efficiency will decline to some extent, and in order to tackle interference, concentrator constantly can mend trick, change route, namely utilize different intelligent table relaying to check meter, have certain improvement.But because the strong jamming equipment interference strengths such as high frequency water pump are large, and 24 hours hot standby, detrimental effects can be produced to carrier communication, intelligent electric meters all under existing kilowatt meter reading-out system concentrator at zero point every night copies and accepts concentrator by low-tension supply wire transmission, general about 300 intelligent electric meters, concentrator can constantly be checked meter in circulation, and the data of copying are issued main website by GPRS channel and also can be issued main website by wired by 4:00 AM concentrator timing every day.Data store by main website, can log in main website, browse related data, operate by LAN (Local Area Network) log-on webpage.Because institute's carrying device in circuit exists interference in uploading data, the benefit of concentrator is recruited and trunking mechanism can not play good effect, the rate of copying greatly will decline and generally only have about 60%, through inspection information, find that problems is at low pressure carrier wave field ubiquity, traditional administering method mainly increases concentrator and repeater, not only increase additional funding to drop into, and only there is certain effect to there is Qing Raoyuantai district, to existing, Chong Raoyuantai district is helpless, there is no effective solution at home at present.
Traditional ammeter Anti-interference Design, as Chinese patent literature CN201120473990 has the automatic meter reading system of intelligent ammeter of anti-carrier-in-interference, this patent adopts and install three-phase ac contactor additional on the cable of three-phase intelligent ammeter and power consumer terminal, this three-phase ac contactor is connected with three-phase intelligent ammeter by space-time switch, need during use and power consumer terminal signing time sharing power supply agreement, this technology stopping at fixed time is adopted to power to emphasis jamming equipment, by the power failure to this kind equipment not use time, to eliminate the interference of time period of checking meter, thus improve platform district copy rate.This patent is not analyzed the origin cause of formation of interference and takes specific aim measure, when implementing, the have a power failure signature of agreement of user is the thing being difficult to realize, because time-of-use tariffs are carried out by Utilities Electric Co., night, electricity price was lower than daytime, so large scale electrical power unit is all being worked at night, significantly the electricity charge can saved like this.Having a power failure at nighttime users also can the normal operation of interference user.
The anti-interference method of the jamproof intelligent electric meter of Chinese patent literature CN201310008166 and intelligent electric meter, comprise relay, shunt and ammeter wiring board, shunt comprises conducting strip and the copper-manganese sampling sheet of both sides, the conducting strip of side connects relay, the two ends of copper-manganese sampling sheet are connected with the conducting strip of both sides respectively, the two ends of copper-manganese sampling sheet are respectively equipped with binding post, the binding post at two ends connects ammeter wiring board respectively by the sample line of two strands, copper-manganese sampling sheet has in space in three perpendicular between two reference fields, copper-manganese sampling sheet two ends are in the symmetria bilateralis distribution centered by a reference field, the projected area of copper-manganese sampling sheet on this center reference face is greater than the projected area of copper-manganese sampling sheet on another two reference fields.This invention provides the technical conceive reducing magnetic interference, three reference fields in space are virtual concepts, be intended to express the virtual plane that three of existing in space are vertical between any two, and these three planes are mutually vertical with the magnetic field of the change coming from three directions all respectively, like this by arranging a reference field perpendicular to it facing maximum direction, variation magnetic field, and copper-manganese sampling sheet is arranged its symmetrical two ends centered by this reference field, and these symmetrical two ends often to hold relative copper-manganese sampling sheet to extend area be in space maximum, the induction electromotive force so produced at its two ends due to maximum variation magnetic field can be cancelled out each other, thus reduce the magnetic interference that direction, maximum variation magnetic field is brought, and then the annoyance level reduced its entirety, compare existing intelligent electric meter, at sectional area, under the prerequisite that the basic parameter such as volume and resistance value is constant, only by changing the configuration of copper-manganese sampling sheet, just the interference to manganese copper diverter can be reduced, intelligent electric meter is made to be measured numerical value accurately.This invention just solves a kind of method of anti-external disturbance, but has no way of suppressing for the crosstalk signal that ammeter self produces, and cannot solve signal cross-talk problem; Direction, maximum variation magnetic field is also often change simultaneously, and this depends on in-site installation environment, and adjusting gear reference field is more difficult.
The EMC Design of intelligent electric meter in the past, only common electromagnetic compatibility index such as Clusters immunity to interference etc. is designed, think that these common electromagnetic compatibility test indexs of solution are just enough by type approval test, so after there is signal cross-talk problem, all do not have to go to consider analyze and solve problem from the angle of electromagnetic compatibility again, the electromagnetic interference (EMI) that intelligent electric meter runs into is polytype, there is extraneous radiation, there is the impulse disturbances from power supply, also the undesired signal that ammeter self produces is had, for dissimilar interference, need to adopt different specific aim measures, thoroughly could solve the electromagnetic interference problem that intelligent electric meter runs into.Signal cross-talk problem long-term existence in power marketing class instrument, as intelligent electric meter, reading meter collection machine, concentrator etc., occur that the crosstalk of platform district is serious at the scene, a concentrator may report the table being several times as much as local area, cause data corruption, visible signal crosstalk is a long-term pendent technical matters.Thus anti-extraneous strong electromagnetic and solution signal cross-talk is the same problem needing to solve.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of intelligent electric meter that can suppress extraneous strong electromagnetic function, thus avoids external interference and signal cross-talk for the impact of ammeter, intelligent electric meter is checked meter more accurate.The technical solution adopted in the utility model is:
An anti-error intelligent electric meter of checking meter, comprises shell, is located at the isolating transformer T1 in shell and wiring board; The input end of isolating transformer T1 taps into line terminals, output end wiring road plate;
Shell adopts permeability magnetic material, and outer casing inner wall scribbles conductive film; Conductive film on outer casing inner wall is for connecting on-the-spot ground wire;
The equal connection line plate of the earth terminal of digit chip digitally GND2 on wiring board, digit chip is all located in electrostatic shielding cover, described electrostatic shielding cover connection line plate digitally GND2;
The power supply unit that circuit on wiring board also comprises power supply decoupling filtering circuit and powers for wiring board; The output terminal of isolating transformer T1 connects power supply unit input end by power supply decoupling filtering circuit, the earth terminal connection line plate GND1 in analog of power supply unit;
Wiring board in analog GND1 and wiring board digitally GND2 magnetic bead be connected;
The inlet wire of this intelligent electric meter adopts Floating ground shield structure.
Further, uncap in the outside of shell gap place, input terminal periphery gap place filling have conductive rubber mud.
Further, the permeability magnetic material of shell is iron-nickel alloy 1J76.
Further, isolating transformer T1 primary coil outside is surrounded with the electrostatic screening layer of link plate GND1 in analog.
Power supply decoupling filtering circuit comprises resistance R1, R2, R3, R4, electric capacity C1 and C2; Resistance R1 and R2 is connected into the first branch road, and resistance R3 and R4 is connected into the second branch road, and one end of the first branch road and the second branch road connects two output terminals of isolating transformer T1 respectively, and the other end of the first branch road and the second branch road connects power supply unit respectively; Electric capacity C1 is connected on resistance R1 and R2 connected node and between resistance R3 and R4 connected node; Electric capacity C2 is connected between the first branch road other end and the second branch road other end.
The Floating ground shield structure of inlet wire comprises: the signal ground of signal source connects inlet wire cable shield, inlet wire cable shield connection line plate digitally GND2; Digitally GND2 is as the internal shield of intelligent electric meter for electrostatic shielding cover link plate, and the conductive film on outer casing inner wall connects the external shielding layer of on-the-spot ground wire as intelligent electric meter.
The utility model has the advantage of: adopt multiple anti-interference method, the antijamming capability of this intelligent electric meter is strong, and the stable reading of feedback is accurate, effectively avoids the situation of by mistake checking meter to occur.
Accompanying drawing explanation
Fig. 1 is outside schematic diagram of the present utility model.
Fig. 2 is internal electrical schematic diagram of the present utility model.
Fig. 3 is power supply decoupling filter circuit construction schematic diagram of the present utility model.
Fig. 4 is the Floating ground shield structural representation of inlet wire of the present utility model.
Embodiment
Below in conjunction with concrete drawings and Examples, the utility model is described in further detail.
The anti-error intelligent electric meter of checking meter that the utility model proposes, the shell first for intelligent electric meter has done good electromagnetic screen process.As shown in Figure 1, anti-error intelligent electric meter of checking meter comprises shell 1, display screen 2, input terminal 3, various function key 4, LED 5 etc.;
Shell 1 adopts high permeability material to form low magnetic circuits, the low-frequency disturbance magnetic line of force is allowed to pass through from the magnetic masking layer that magnetic resistance is very little, make ammeter internal circuit from the impact of low frequency magnetic field coupled interference, high permeability material makes magnetic circuit close, and can reduce the electromagnetic interference (EMI) of the magnetic field interference sources such as heavy motor, reactor, magnetic switch and big current current carrying conductor.The permeability magnetic material of shell 1 is the iron-nickel alloy 1J76 of high nickel content.
Shell 1 inwall scribbles conductive film, makes the circuit component of ammeter inside be in closed full-shield space, the shielding design that shell 1 is dual, make extraneous electromagnetic interference (EMI) be difficult to enter in it.
In order to increase the effectiveness of shell 1 further, gap 101 place that can also uncap in the outside of shell 1 further, input terminal 3 periphery gap 301 place filling conductive rubber mud; Conductive rubber mud is with high resiliency body rubber for base-material, and what adopt macromolecular material to make does not solidify self-adhering-type conducting resin throughout one's life, and conductive particle is uniformly distributed in resin binder.
The circuit of intelligent electric meter inside as shown in Figure 2, comprises isolating transformer T1 and wiring board; The input end of isolating transformer T1 taps into line terminals 3, output end wiring road plate; The elementary secondary coil ratio of isolating transformer T1 is 1:1, and block the DC influence in AC signal, common mode disturbance voltage is inhibited owing to not forming loop.In order to suppress common mode interference, harmonic carcellation, isolating transformer T1 primary coil outside is surrounded with the electrostatic screening layer of link plate GND1 in analog.
Element on wiring board comprises the digit chips such as carrier chip, computation chip, main control MCU, and wherein carrier chip is used for communicating with host computer; The equal connection line plate of the earth terminal digitally GND2 of digit chip; All electrostatic shielding cover is covered with outside these digit chips; For preventing extraneous forceful electric power from disturbing, the digit chip electrostatic shielding cover be easily disturbed is sealed; Electrostatic shielding cover bottom welding covers on copper cabling in the circuit board, thus connection line plate digitally GND2;
The power supply unit (including step-down, rectification, voltage stabilizing etc.) that circuit on wiring board also comprises power supply decoupling filtering circuit and powers for wiring board; The output terminal of isolating transformer T1 connects power supply unit input end by power supply decoupling filtering circuit, the earth terminal connection line plate GND1 in analog of power supply unit.When multiple ammeter uses same incoming power, the internal resistance of source can become the common resistance of multiple meter circuit, and when in a certain circuit, electric current changes, the voltage that common impedance produces just has become the interference source to other circuit.Power supply decoupling filtering circuit is with regard to the coupled interference of filtering from incoming power internal impedance.
Power supply decoupling filtering circuit as shown in Figure 3, comprises resistance R1, R2, R3, R4, electric capacity C1 and C2; Resistance R1 and R2 is connected into the first branch road, and resistance R3 and R4 is connected into the second branch road, and one end of the first branch road and the second branch road connects two output terminals of isolating transformer T1 respectively, and the other end of the first branch road and the second branch road connects power supply unit respectively; Electric capacity C1 is connected on resistance R1 and R2 connected node and between resistance R3 and R4 connected node; Electric capacity C2 is connected between the first branch road other end and the second branch road other end.
Wiring board in analog GND1 and wiring board digitally GND2 magnetic bead be connected, magnetic bead adopts the Ferrite Material sintered surface one-tenth at high band with good resistance characteristic, be exclusively used in and suppress the high frequency noise on signal wire, power lead and spike to disturb, also there is the ability absorbing electrostatic pulse.
Finally contrast Fig. 4, analyze the Floating ground shield structure of the utility model inlet wire.The signal ground of signal source Us connects inlet wire cable shield, inlet wire cable shield connection line plate digitally GND2; Digitally GND2 is as the internal shield of intelligent electric meter for electrostatic shielding cover link plate on digit chip, and the conductive film on shell 1 inwall connects the external shielding layer of on-the-spot ground wire as intelligent electric meter; On-the-spot ground wire is the ground wire that ammeter erecting stage is directly connected with the earth.In said structure, the signal ground floating of input signal, does not connect on-the-spot ground wire, and common mode input impedance is greatly improved, and the common mode current that common mode voltage causes in input circuit greatly reduces, thus inhibits the source of common mode interference, common mode interference is down to minimum.Electrostatic shielding cover welding digitally covering on copper cash in the circuit board, and the cable shield of inlet wire also weld in the circuit board digitally cover on copper cash, define floating ground, can 55DB be reached to magnetic interference decay.
Ground structure of the present utility model can suppress to disturb commonly, then substantially solve carrier signal cross-interference issue; Good shielding construction can play the effect suppressing radiation interference, then solve extraneous strong electromagnetic problem.
Claims (6)
1. an anti-error intelligent electric meter of checking meter, comprises shell (1), it is characterized in that, also comprises and is located at isolating transformer T1 in shell (1) and wiring board; The input end of isolating transformer T1 taps into line terminals (3), output end wiring road plate;
Shell (1) adopts permeability magnetic material, and shell (1) inwall scribbles conductive film; Conductive film on shell (1) inwall is for connecting on-the-spot ground wire;
The equal connection line plate of the earth terminal of digit chip digitally GND2 on wiring board, digit chip is all located in electrostatic shielding cover, described electrostatic shielding cover connection line plate digitally GND2;
The power supply unit that circuit on wiring board also comprises power supply decoupling filtering circuit and powers for wiring board; The output terminal of isolating transformer T1 connects power supply unit input end by power supply decoupling filtering circuit, the earth terminal connection line plate GND1 in analog of power supply unit;
Wiring board in analog GND1 and wiring board digitally GND2 magnetic bead be connected;
The inlet wire of this intelligent electric meter adopts Floating ground shield structure.
2. anti-error intelligent electric meter of checking meter as claimed in claim 1, is characterized in that:
Uncap in the outside of shell (1) gap (101) place, input terminal (3) periphery gap (301) place filling have conductive rubber mud.
3. anti-error intelligent electric meter of checking meter as claimed in claim 1, is characterized in that:
The permeability magnetic material of shell (1) is iron-nickel alloy 1J76.
4. anti-error intelligent electric meter of checking meter as claimed in claim 1, is characterized in that:
Isolating transformer T1 primary coil outside is surrounded with the electrostatic screening layer of link plate GND1 in analog.
5. anti-error intelligent electric meter of checking meter as claimed in claim 1, is characterized in that:
Power supply decoupling filtering circuit comprises resistance R1, R2, R3, R4, electric capacity C1 and C2; Resistance R1 and R2 is connected into the first branch road, and resistance R3 and R4 is connected into the second branch road, and one end of the first branch road and the second branch road connects two output terminals of isolating transformer T1 respectively, and the other end of the first branch road and the second branch road connects power supply unit respectively; Electric capacity C1 is connected on resistance R1 and R2 connected node and between resistance R3 and R4 connected node; Electric capacity C2 is connected between the first branch road other end and the second branch road other end.
6. anti-error intelligent electric meter of checking meter as claimed in claim 1, is characterized in that:
The Floating ground shield structure of inlet wire comprises: the signal ground of signal source connects inlet wire cable shield, inlet wire cable shield connection line plate digitally GND2; Digitally GND2 is as the internal shield of intelligent electric meter for electrostatic shielding cover link plate, and the conductive film on shell (1) inwall connects the external shielding layer of on-the-spot ground wire as intelligent electric meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420774115.1U CN204287268U (en) | 2014-12-10 | 2014-12-10 | Anti-error intelligent electric meter of checking meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420774115.1U CN204287268U (en) | 2014-12-10 | 2014-12-10 | Anti-error intelligent electric meter of checking meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204287268U true CN204287268U (en) | 2015-04-22 |
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ID=52870417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420774115.1U Withdrawn - After Issue CN204287268U (en) | 2014-12-10 | 2014-12-10 | Anti-error intelligent electric meter of checking meter |
Country Status (1)
| Country | Link |
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| CN (1) | CN204287268U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459241A (en) * | 2014-12-10 | 2015-03-25 | 国家电网公司 | Intelligent electric meter with mistaken meter reading preventing function |
| CN105161366A (en) * | 2015-09-30 | 2015-12-16 | 成都恒力达科技有限公司 | Safe high-efficiency solid-state relay |
| CN105182023A (en) * | 2015-08-20 | 2015-12-23 | 国网天津静海供电有限公司 | Electricity theftproof ammeter cover |
-
2014
- 2014-12-10 CN CN201420774115.1U patent/CN204287268U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459241A (en) * | 2014-12-10 | 2015-03-25 | 国家电网公司 | Intelligent electric meter with mistaken meter reading preventing function |
| CN104459241B (en) * | 2014-12-10 | 2017-07-07 | 国家电网公司 | The anti-error intelligent electric meter checked meter |
| CN105182023A (en) * | 2015-08-20 | 2015-12-23 | 国网天津静海供电有限公司 | Electricity theftproof ammeter cover |
| CN105161366A (en) * | 2015-09-30 | 2015-12-16 | 成都恒力达科技有限公司 | Safe high-efficiency solid-state relay |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150422 Effective date of abandoning: 20170707 |
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| AV01 | Patent right actively abandoned |