CN101865957B - Method and device for detecting electric discharge interference and electric energy meter provided with the device - Google Patents
Method and device for detecting electric discharge interference and electric energy meter provided with the device Download PDFInfo
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- CN101865957B CN101865957B CN 200910133546 CN200910133546A CN101865957B CN 101865957 B CN101865957 B CN 101865957B CN 200910133546 CN200910133546 CN 200910133546 CN 200910133546 A CN200910133546 A CN 200910133546A CN 101865957 B CN101865957 B CN 101865957B
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Abstract
The invention relates to a method for detecting electric discharge interference and a device thereof and an electric energy meter provided with the device. The method includes the following steps: a signal acquirer is arranged to capture the electric discharge signal conducted by air; a signal converter is arranged to convert the electric discharge signal into a measuring signal the frequency and amplitude of which are limited in certain range; and a signal processor is arranged to analyze the measuring signal, namely the pulse number of the measuring signal is counted in the preset time period, if the accumulated count in unit time is in the preset range, the measuring signal is judged to be an electric discharge interference. The invention can accurately detect the man-made electric discharge interference event.
Description
Technical field
The present invention relates to a kind of gauging instrument, especially electric energy meter.
Background technology
At gauging instrument, in the use such as electric energy meter, run into artificial interference and destruction sometimes.Wherein, a kind of novel interference and means of destruction are to adopt strong high-pressure generation equipment to disturb electric energy meter to reach the purpose that influences the electric energy meter operate as normal even damage electric energy meter through the mode of air transmitted discharge.The mode that this artificial discharge is disturbed, discharge disturb the signal frequency that produces high and irregular, and pulse width is little and instantaneous voltage is high, owing to there is not tangible depredation, normally are difficult to find.And this interference and failure mode can make the electron device in the electric energy meter lose normal function, and metering is caused the loss that is difficult to retrieve, and its influence is quite abominable.
Summary of the invention
One object of the present invention is, provides a kind of and can accurately detect the method for the generation of artificial discharge interference incident, the electric energy meter that installs and have this device.
In order to realize above-mentioned purpose, the present invention provides a kind of method that discharge is disturbed that detects, and comprises the following steps: to be provided with a signal picker, in order to catch the discharge signal through air transmitted; One signal converter is set, becomes frequency and amplitude to be limited to the measuring-signal in the setting range in order to the said discharge signal of conversion; One signal processor is set; In order to said measuring-signal is analyzed and judged, just, the umber of pulse to said measuring-signal in the time period of setting adds up; If the accumulative total in the unit interval is in the scope of a setting, then said measuring-signal is judged as a discharge and disturbs.
Further, in order to realize above-mentioned purpose, the present invention provides a kind of device that discharge is disturbed that detects, and comprising: a signal picker, in order to catch discharge signal through air transmitted; One signal converter; Comprise an input end and an output terminal; This input end links to each other with said signal picker, and this signal converter becomes frequency and amplitude to be limited to the measuring-signal in the setting range in order to the said discharge signal of conversion, and via this output terminal this measuring-signal is seen off; An and signal processor; Comprise a timer, a counter, an input end and a state indication end; This input end links to each other with the output terminal of said signal converter; This signal processor added up through the umber of pulse of said counter to said measuring-signal in the time period that said timer is set; If in the time of setting, the accumulative total of said counter is in the scope set, then said measuring-signal is judged as a discharge and disturbs, and this state indication end is arranged to one detects the state that discharge is disturbed.
Again further, in order to realize above-mentioned purpose, the present invention also provides a kind of electric energy meter, is equiped with the device that above-mentioned detection discharge is disturbed on it.
Compared with prior art, the present invention has following beneficial effect:
Through signal converter signal pickup assembly is collected, frequency is high and irregular; Little and the instantaneous voltage of pulse width is high-leveled and difficult to discharge and changes into low-frequency low-voltage signal effectively with the excess energy as the discharge signal of useful signal; Again the counting through signal processor with judge the digital filtering that is constituted; Can the incidents such as thunderbolt that physical environment possibly truly occur down be got rid of; Correctly detect artificial discharge undesired signal, according to this testing result, the microprocessor system on the electric energy meter can also write down the time of origin and the number of times of undesired signal according to the needs of different user; And produce alerting signal or close metering outfit automatically, play the effect of caution and protection equipment.
Description of drawings
Fig. 1 is the theory diagram of the device of detection discharge interference of the present invention.
Fig. 2 is the signal processor process flow diagram that Interference Detection judges that discharges in the device that disturbs of detection of the present invention discharge.
Fig. 3 is the schematic diagram of signal converter embodiment one in the device that disturbs of detection of the present invention discharge.
Fig. 4 is the schematic diagram of signal converter embodiment two in the device that disturbs of detection of the present invention discharge.
Fig. 5 is the schematic diagram of signal converter embodiment three in the device that disturbs of detection of the present invention discharge.
Fig. 6 is the schematic diagram of signal converter embodiment four in the device that disturbs of detection of the present invention discharge.
Fig. 7 is the schematic diagram of signal converter embodiment five in the device that disturbs of detection of the present invention discharge.
Embodiment
In order to further specify principle of the present invention and structure, combine accompanying drawing to a preferred embodiment of the present invention will be described in detail at present.
Fig. 1 is the structure composition frame chart of the device of detection discharge interference of the present invention.The device that detection discharge of the present invention is disturbed is mainly by signal picker, and signal converter and signal processor three parts are formed.
First is a signal picker, and it is responsible for gathering the discharge undesired signal that external unit produces.This signal picker is mounted in the metallic object on the electric energy meter, and metallic object can adopt compositions such as various ways such as sheet metal, wire netting, metal wire.
Second portion is a signal converter, because the discharge signal frequency that signal picker collects is high and irregular, pulse width is little and instantaneous voltage is high-leveled and difficult handles directly to offer signal processor as useful signal.The effect of this part is exactly that electric energy with this discharge signal discharges through other forms of energy, simultaneously the reluctant signal of sort processor is changed into the low-frequency low-voltage signal that can supply processor processes.
Third part is a signal processor, and it can be accomplished through the central processing unit in the electric energy meter (MCU), also can realize through special microprocessor.
Confirm process flow diagram referring to interference incident shown in Figure 2, signal processor is judged the signal from signal converter confirm whether be the discharge undesired signal through the events corresponding decision logic.After detecting this interference, signal processor can also write down the time of origin and the number of times of undesired signal according to the needs of different user, and produces alerting signal or close metering outfit automatically, plays the effect of caution and protection equipment.
Wherein, The undesired signal incident confirms that logic can be: after detecting similar undesired signal; Signal processor starts inner register and timer and detects; Similar undesired signal just confirms to have this moment the discharge interference incident that the time of generation takes place and notes in case find there are 5 times in 1 minute more than (containing 5 times), if the undesired signal number of times is less than 5 times then do not think interference incident in 1 minute, refuses record.The interference incident erroneous judgement of adopting this decision logic can effectively prevent incidents such as similar thunderbolt (frequency of the generation of undesired signal when the frequency that takes place in the incident unit interval will be far smaller than the interference incident generation) generation and causing is disconnected.
Fig. 3 is the schematic diagram of signal converter embodiment one.Signal converter is made up of discharge tube D1 and change-over circuit R1, R2.Discharge tube D1 can select gas-discharge tube or solid discharging tube for use, and R1, R2 constitute the branch voltage conversion circuit.Electric energy meter does not receive under the situation of discharge interference, and D1 is in off-state, and what signal processor was received is a high level signal.Electric energy meter receives under the situation that discharge disturbs, and signal picker offers discharge tube D1 with the discharge signal of collecting, and D1 can be converted into other forms of energy with the discharge signal electric energy and discharged this moment.In the dispose procedure of energy; Discharge tube type of being in conducting state; The receiving end that branch through R1 and R2 is pressed in signal processor produces a useful signal that can supply processor to judge, signal processor can be judged the generation of discharge interference incident and handles accordingly according to concrete decision logic.
Need to prove that because there is the response time in discharge tube D1, combine the signal handling capacity of microprocessor again, the frequency of said measuring-signal generally is limited to and is not higher than 200KHZ.
Can realize by different ways for signaling conversion circuit.Conversion portion can adopt forms such as photoelectrical coupler, triode or diode to replace, and power supply can adopt the internal electric source or the powered battery of electric energy meter, and the ground that discharge tube connects can be the internally perhaps outside zero line ground of instrument.
Fig. 4 is the schematic diagram of signal converter embodiment two.Wherein, Z1 is a voltage stabilizing diode, plays the effect of holding circuit, and U1 is a photoelectrical coupler.Do not receive under the situation that discharge disturbs at electric energy meter, D1 is in off-state, and photoelectrical coupler U1 can conducting, is low level all the time on its pin 4.Receive under the situation that discharge disturbs at electric energy meter, D1 is converted into the electric energy of discharge signal that other forms of energy discharges and type of being in conducting state.Photoelectrical coupler U1 conducting in this state, its pin 3 can produce a high level signal and be input to signal processor, and signal processor can require to judge the generation of discharge interference incident and handle accordingly according to concrete logic.
Fig. 5 is the schematic diagram of signal converter embodiment three, adopts triode Q1 to realize.Do not receive under the situation that discharge disturbs at electric energy meter, D1 is in off-state, and triode Q1 can conducting, and what the voltage division signal processor through R1 and R3 obtained is high level signal.Receive under the situation that discharge disturbs at electric energy meter, D1 is converted into the electric energy of discharge signal that other forms of energy discharges and type of being in conducting state, Q1 conducting in this state, and what signal processor obtained is low level signal.Signal processor can require to judge the generation of discharge interference incident and handle accordingly according to concrete logic.
Fig. 6 is the schematic diagram of signal converter embodiment four, adopts diode D2 to realize.Do not receive at electric energy meter under the situation of discharge interference, D1 is in off-state, and what signal processor obtained is high level signal.Receive under the situation that discharge disturbs at electric energy meter, D1 is converted into the electric energy of discharge signal that other forms of energy discharges and type of being in conducting state, and what signal processor obtained in this state is low level signal.Signal processor can require to judge the generation of discharge interference incident and handle accordingly according to concrete logic.
Fig. 7 is the schematic diagram of signal converter embodiment five, and itself and signal converter embodiment two shown in Figure 4 are similar, and the difference part is that in the present embodiment, photoelectrical coupler U1 adopts battery BAT1 power supply.
The above is merely preferable possible embodiments of the present invention, and unrestricted protection scope of the present invention, so the equivalent structure that all utilizations instructions of the present invention and accompanying drawing content have been done changes, all is included in protection scope of the present invention.
Claims (8)
1. one kind is detected the method that discharge is disturbed, and it is characterized in that, comprises the following steps:
One signal picker is set, in order to catch discharge signal through air transmitted;
One signal converter is set, in order to the said discharge signal of conversion become frequency not to be higher than 200KHZ, amplitude is limited to the measuring-signal in the setting range;
One signal processor is set; In order to said measuring-signal is analyzed and judged, just, the umber of pulse to said measuring-signal in the time period of setting adds up; If the accumulative total in the unit interval is that per minute is not less than 5, then said measuring-signal is judged as a discharge and disturbs.
2. one kind is detected the device that discharge is disturbed, and it is characterized in that, comprising:
One signal picker is in order to catch the discharge signal through air transmitted;
One signal converter; Comprise an input end and an output terminal; This input end links to each other with said signal picker; This signal converter in order to the said discharge signal of conversion become frequency not to be higher than 200KHZ, amplitude is limited to the measuring-signal in the setting range, and this measuring-signal is seen off via this output terminal;
One signal processor; Comprise a timer, a counter, an input end and a state indication end; The input end of this signal processor links to each other with the output terminal of said signal converter; This signal processor added up through the umber of pulse of said counter to said measuring-signal in the time period that said timer is set; If in the time of setting, the accumulative total of said counter is that per minute is not less than 5, then said measuring-signal is judged as a discharge and disturbs, and this state indication end is arranged to one detects the state that discharge is disturbed.
3. device as claimed in claim 2 is characterized in that, said signal picker is a metallic object.
4. device as claimed in claim 2 is characterized in that, said signal converter comprises a discharge tube and the change-over circuit that links to each other with this discharge tube.
5. device as claimed in claim 4 is characterized in that, said change-over circuit is a resistor voltage divider circuit.
6. device as claimed in claim 4 is characterized in that, said change-over circuit is the active circuit that is made up of diode, triode or photoelectrical coupler.
7. device as claimed in claim 6 is characterized in that said active circuit is battery-powered.
8. an electric energy meter is characterized in that, has the device that arbitrary described detection discharge is disturbed like claim 2 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910133546 CN101865957B (en) | 2009-04-14 | 2009-04-14 | Method and device for detecting electric discharge interference and electric energy meter provided with the device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910133546 CN101865957B (en) | 2009-04-14 | 2009-04-14 | Method and device for detecting electric discharge interference and electric energy meter provided with the device |
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| CN101865957A CN101865957A (en) | 2010-10-20 |
| CN101865957B true CN101865957B (en) | 2012-06-27 |
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| CN 200910133546 Active CN101865957B (en) | 2009-04-14 | 2009-04-14 | Method and device for detecting electric discharge interference and electric energy meter provided with the device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2247346Y (en) * | 1995-09-22 | 1997-02-12 | 西安供电局 | Device for on-line monitoring transformer inner discharge |
| CN2476891Y (en) * | 2001-04-05 | 2002-02-13 | 中国科学院安徽光学精密机械研究所 | On-off circuit for reducing Pukel box discharge interference |
| WO2003065055A2 (en) * | 2002-01-31 | 2003-08-07 | Iskraemeco, Merjenje In Upravljanje Energije, D.D. | Magnetic field detection system for an electricity meter |
| CN2616911Y (en) * | 2003-03-21 | 2004-05-19 | 南海市浩迪创新科技有限公司 | Data acquisition device for pulse electric energy meter |
| CN200972682Y (en) * | 2006-10-30 | 2007-11-07 | 杭州海兴电器有限公司 | Keyboard multifunction prepayment electric energy meter |
-
2009
- 2009-04-14 CN CN 200910133546 patent/CN101865957B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2247346Y (en) * | 1995-09-22 | 1997-02-12 | 西安供电局 | Device for on-line monitoring transformer inner discharge |
| CN2476891Y (en) * | 2001-04-05 | 2002-02-13 | 中国科学院安徽光学精密机械研究所 | On-off circuit for reducing Pukel box discharge interference |
| WO2003065055A2 (en) * | 2002-01-31 | 2003-08-07 | Iskraemeco, Merjenje In Upravljanje Energije, D.D. | Magnetic field detection system for an electricity meter |
| CN2616911Y (en) * | 2003-03-21 | 2004-05-19 | 南海市浩迪创新科技有限公司 | Data acquisition device for pulse electric energy meter |
| CN200972682Y (en) * | 2006-10-30 | 2007-11-07 | 杭州海兴电器有限公司 | Keyboard multifunction prepayment electric energy meter |
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| CN101865957A (en) | 2010-10-20 |
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Effective date of registration: 20191022 Address after: 1218 Hezuo Road, Chengdu high tech Zone (West Zone), Chengdu, Sichuan Patentee after: CHENGDU GREAT WALL DEVELOPMENT TECHNOLOGY Co.,Ltd. Address before: 7006 CaiTian Road, Futian District, Shenzhen, Guangdong Province Patentee before: SHENZHEN KAIFA TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20191223 Address after: Futian District Shenzhen City, Guangdong province 518000 CaiTian Road No. 7006 Patentee after: SHENZHEN KAIFA TECHNOLOGY Co.,Ltd. Address before: 611000 no.1218, Hezuo Road, Chengdu high tech Zone (West Zone), Chengdu, Sichuan Province Patentee before: CHENGDU GREAT WALL DEVELOPMENT TECHNOLOGY Co.,Ltd. |
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Address after: 611731 No. 99, Tianquan Road, high tech Zone, Chengdu, Sichuan Patentee after: Chengdu Great Wall Development Technology Co.,Ltd. Address before: 611731 no.1218, Hezuo Road, high tech Zone (West District), Chengdu, Sichuan Province Patentee before: CHENGDU GREAT WALL DEVELOPMENT TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20220825 Address after: Futian District Shenzhen City, Guangdong province 518000 CaiTian Road No. 7006 Patentee after: SHENZHEN KAIFA TECHNOLOGY Co.,Ltd. Address before: 611731 No. 99, Tianquan Road, high tech Zone, Chengdu, Sichuan Patentee before: Chengdu Great Wall Development Technology Co.,Ltd. |
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Effective date of registration: 20221221 Address after: 611731 No. 99, Tianquan Road, high tech Zone, Chengdu, Sichuan Patentee after: Chengdu Great Wall Development Technology Co.,Ltd. Address before: Futian District Shenzhen City, Guangdong province 518000 CaiTian Road No. 7006 Patentee before: SHENZHEN KAIFA TECHNOLOGY Co.,Ltd. |