CN102081153A - Clock system standard source and work method - Google Patents
Clock system standard source and work method Download PDFInfo
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- CN102081153A CN102081153A CN2011100344320A CN201110034432A CN102081153A CN 102081153 A CN102081153 A CN 102081153A CN 2011100344320 A CN2011100344320 A CN 2011100344320A CN 201110034432 A CN201110034432 A CN 201110034432A CN 102081153 A CN102081153 A CN 102081153A
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- clock
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000002955 isolation Methods 0.000 claims abstract description 38
- 238000007493 shaping process Methods 0.000 claims abstract description 4
- 238000009434 installation Methods 0.000 claims description 27
- 238000001514 detection method Methods 0.000 claims description 4
- 238000007689 inspection Methods 0.000 abstract 5
- 239000012141 concentrate Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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Abstract
The invention relates to a clock system standard source and a work method. In the traditional general checkout platform of multi-function watt-hour meters, generally, every device is provided with an independent clock apparatus, the number of the clock apparatuses is large, the cost of the clock apparatuses is high, and the clock apparatuses need submittal for inspection every year, which wastes time and labor. The invention is characterized by comprising a clock apparatus, a driving plate and a plurality of isolation switch plates, wherein the driving plate which is connected with the clock apparatus is used for frequency division and shaping for high frequency pulses; the isolation switch plates which are connected with the driving plate are used for electrical isolation, the output of the isolation switch plates is connected with an error inspection device so that frequency division clock signals are isolated and sent to the error inspection device. The invention has the advantages of convenience of submittal for inspection, low cost, high inspection accuracy and high stability.
Description
Technical field
The present invention relates to a kind of clock system standard source and method of work.
Background technology
The common checking table of existing multifunctional electric energy meter, general each device all is equipped with an independently clock instrument, be used to examine and determine the accuracy of electric energy meter clock internal, and the tester on general each layer of calibrating streamline body is at dozens or even hundreds of cover, the corresponding clock instrument is also in requisition for dozens or even hundreds of cover, and quantity is many, the cost height, and the clock instrument all will inspect by ready samples every year, wastes time and energy.
Summary of the invention
The technical assignment of the technical problem to be solved in the present invention and proposition is that the prior art scheme is improved and improved, and a kind of clock system standard source and method of work are provided, and cost is low, precision is high to reach, inspect purpose easily by ready samples.For this reason, the present invention takes following technical scheme.
It also comprises the drive plate to high-frequency impulse frequency division and shaping of being used for that is connected with the clock instrument, the a plurality of isolation switch boards that are used for electrical isolation that are connected with drive plate, the delivery outlet of isolating switch boards is connected with the error calibrating installation to give the error calibrating installation with sub-frequency clock signal after isolating.Owing to use object (single-chip microcomputer) can't receive high-frequency pulse, and high-frequency signal transmission is disturbed easily and miscellaneous part produced disturb, so set up a drive plate that is used for frequency division between clock instrument and isolation switch boards.A plurality of error calibrating installations use same high precision clock instrument, adopt and concentrate the mode of sharing, and have solved the annual loaded down with trivial details task that the clock instrument of each matched with devices need be inspected by ready samples one by one, and the present invention only need inspect a cover clock instrument and a supporting drive plate thereof by ready samples; In the concentrated electric energy meter calibrating apparatus, owing to only need a clock instrument, equipment cost is low, even adopt the high accuracy clock instrument to improve calibrating accuracy, degree of stability, the corresponding increase of its cost is also few.
As the further of technique scheme improved and replenish, the present invention also comprises following additional technical feature.
The quantity of described isolation switch boards and error calibrating installation matches with detection station number.One detects the detection that station is used for an electric energy meter.
The clock instrument connects a plurality of drive plates, and a drive plate connects a plurality of isolation switch boards.
Wiring between clock instrument and the drive plate adopts bus to add star-like wire laying mode, and jamproof shielding line is adopted in being connected between clock instrument and the drive plate.
Described clock instrument is that accuracy is 1 * 10
-8The high precision clock source, it exports to the shared clock source of drive plate as a plurality of error calibrating installations by shielding line.
Described drive plate and isolate is connected with shielding line being that the 100KHz clock signal is exported to the isolation switch boards with frequency between the switch boards.
The input port of described isolation switch boards is connected with standard electric energy meter after the standard electric energy impulse of standard electric energy meter is isolated gives the error calibrating installation, and described isolation switch boards is provided with the handover module that is used for switching standards electrical energy pulse and standard time clock pulse.
Described handover module is provided with a relay so that clock signal and electric power signal switching are exported to the error calibrating installation.
Clock system standard source method of work is characterized in that it may further comprise the steps:
1) standard time clock frequency division actuation step, the output frequency that drive plate generates the clock instrument are that the sinusoidal waveform of 10MHz carries out frequency division, and output frequency is the square wave of 100KHz, form and share the clock source;
2) isolation step, a plurality of isolation switch boards are carried out light-coupled isolation to the 100KHz square wave of drive plate output, and the time clock after isolating is exported to the error calibrating installation;
Isolate switch boards and receive the electric energy meter pulse in the receive clock pulse, the two-way pulse is exported to the error calibrating installation after a relay through isolating switch boards switches after light-coupled isolation.
Beneficial effect:
1, censorship is convenient, a plurality of error calibrating installations use same high precision clock instrument, adopt and concentrate the mode of sharing, solved the annual loaded down with trivial details task that the clock instrument of each matched with devices need be inspected by ready samples one by one, the present invention only need inspect a cover clock instrument and a supporting drive plate thereof by ready samples.
2, cost is low, and in the concentrated electric energy meter calibrating apparatus, owing to only need a clock instrument, equipment cost is low, and is even adopt the high accuracy clock instrument to improve calibrating accuracy, degree of stability, also few more than the prior art scheme after the corresponding increase of its cost.
Description of drawings
Fig. 1 is a principle of the invention block diagram.
Fig. 2 is a wire structures schematic diagram of the present invention.
Embodiment
Below in conjunction with Figure of description technical scheme of the present invention is described in further detail.
As shown in Figure 2, the present invention includes the clock instrument, what be connected with the clock instrument is used for drive plate to high-frequency impulse frequency division and shaping, the a plurality of isolation switch boards that are used for electrical isolation that are connected with drive plate, the delivery outlet of isolating switch boards is connected with the error calibrating installation to give the error calibrating installation with sub-frequency clock signal after isolating.The quantity of isolating switch boards and error calibrating installation matches with detection station number.The clock instrument connects a plurality of drive plates, and a drive plate connects a plurality of isolation switch boards.Wiring between clock instrument and the drive plate adopts bus to add star-like wire laying mode, and jamproof shielding line is adopted in being connected between clock instrument and the drive plate.The clock instrument is that accuracy is 1 * 10
-8The high precision clock source, it exports to the shared clock source of drive plate as a plurality of error calibrating installations by shielding line.Drive plate and isolate is connected with shielding line being that the 100KHz clock signal is exported to the isolation switch boards with frequency between the switch boards.The input port of described isolation switch boards is connected with standard electric energy meter after the standard electric energy impulse of standard electric energy meter is isolated gives the error calibrating installation, and described isolation switch boards is provided with the handover module that is used for switching standards electrical energy pulse and standard time clock pulse.Handover module is provided with a relay so that clock signal and electric power signal switching are exported to the error calibrating installation.
Clock system standard source method of work is as shown in Figure 1:
1) standard time clock frequency division actuation step, the output frequency that drive plate generates the clock instrument are that the sinusoidal waveform of 10MHz carries out frequency division, and output frequency is the square wave of 100KHz, form and share the clock source;
2) isolation step, a plurality of isolation switch boards are carried out light-coupled isolation to the 100KHz square wave of drive plate output, and the time clock after isolating is exported to the error calibrating installation.
Isolate switch boards and receive the electric energy meter pulse in the receive clock pulse, the two-way pulse is exported to the error calibrating installation after a relay through isolating switch boards switches after light-coupled isolation.
Among the figure, A) standard clock source:
1, output frequency: 1MHz, 5MHz, 10MHz
2, daily fluctuation: 5 * 10-10
3, second level degree of stability: 1 * 10-11/S
4, ageing rate: 2 * 10-10/S
5, output waveform: sine wave
6, output amplitude: 0.5Vrms/50 Ω
7, output impedance: 1K Ω
8, the calibration degree of certainty that dispatches from the factory: 1 * 10-8
B) drive plate:
1, incoming frequency: 10M
2, output frequency: 100KHz
3, output waveform: square wave
3, markers accuracy: 2 * 10-7
C) isolate switch boards:
1, incoming frequency: 100KHz
2, output frequency: 100KHz, light-coupled isolation
3, be used to switch electric energy full sized pules and clock standard pulse
D) calibrating installation error system: be the conventional parts that are equipped with of calibrating stage body.
The intrinsic accuracy of tradition clock instrument employing crystal oscillator is generally-7 powers of 10, the present invention adopts DP-4A precision interval clock source, its accuracy is-8 powers of 10, improved accuracy, degree of stability, reliability, and also cost is also low, with every layer of 50 tester is that example illustrates its cost-benefit situation, the present invention and prior art benefit comparison sheet:
| ? | Single price | Parts price (drive plate, wire rod) | Quantity | Total price |
| Tradition clock instrument | 2000 | -- | 50 | 100,000 |
| New clock instrument | 20,000 | 20,000 | ?1 | 40,000 |
Because the clock instrument all will be inspected by ready samples every year, traditional clock instrument need be pulled down censorship with 50; And the latter only need examine and determine a cover precision interval clock source and its supporting drive plate gets final product, and censorship is convenient.The present invention has embodied outstanding substantive distinguishing features of the present invention and has shown the progress in step, can under enlightenment of the present invention, carry out the equivalent modifications of aspects such as shape, structure to it according to the use needs of reality, all at the row of the protection domain of this programme.
Claims (10)
1. clock system standard source, comprise the clock instrument, it is characterized in that: it also comprises the drive plate to high-frequency impulse frequency division and shaping of being used for that is connected with the clock instrument, the a plurality of isolation switch boards that are used for electrical isolation that are connected with drive plate, the delivery outlet of isolating switch boards is connected with the error calibrating installation to give the error calibrating installation with sub-frequency clock signal after isolating.
2. clock system standard source according to claim 1 is characterized in that: the quantity of described isolation switch boards and error calibrating installation matches with detection station number.
3. clock system standard source according to claim 2 is characterized in that: the clock instrument connects a plurality of drive plates, and a drive plate connects a plurality of isolation switch boards.
4. clock system standard source according to claim 3 is characterized in that: wiring between clock instrument and the drive plate adopts bus to add star-like wire laying mode, and jamproof shielding line is adopted in being connected between clock instrument and the drive plate.
5. clock system standard source according to claim 4 is characterized in that: described clock instrument is that accuracy is 1 * 10
-8The high precision clock source, it exports to the shared clock source of drive plate as a plurality of error calibrating installations by shielding line.
6. clock system standard source according to claim 5 is characterized in that: described drive plate and isolate is connected with shielding line being that the 100KHz clock signal is exported to the isolation switch boards with frequency between the switch boards.
7. clock system standard source according to claim 1, it is characterized in that: the input port of described isolation switch boards is connected with standard electric energy meter after the standard electric energy impulse of standard electric energy meter is isolated gives the error calibrating installation, and described isolation switch boards is provided with the handover module that is used for switching standards electrical energy pulse and standard time clock pulse.
8. clock system standard source according to claim 7 is characterized in that: described handover module is provided with a relay so that clock signal and electric power signal switching are exported to the error calibrating installation.
9. clock system standard source method of work according to claim 1 is characterized in that it may further comprise the steps:
1) standard time clock frequency division actuation step, the output frequency that drive plate generates the clock instrument are that the sinusoidal waveform of 10MHz carries out frequency division, and output frequency is the square wave of 100KHz, form and share the clock source;
2) isolation step, a plurality of isolation switch boards are carried out light-coupled isolation to the 100KHz square wave of drive plate output, and the time clock after isolating is exported to the error calibrating installation.
10. clock system standard source method of work according to claim 9, it is characterized in that: isolate switch boards and in the receive clock pulse, receive the electric energy meter pulse, the two-way pulse is exported to the error calibrating installation after a relay through isolating switch boards switches after light-coupled isolation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100344320A CN102081153B (en) | 2011-01-31 | 2011-01-31 | Clock system standard source and work method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100344320A CN102081153B (en) | 2011-01-31 | 2011-01-31 | Clock system standard source and work method |
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| Publication Number | Publication Date |
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| CN102081153A true CN102081153A (en) | 2011-06-01 |
| CN102081153B CN102081153B (en) | 2013-12-04 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102298135A (en) * | 2011-07-22 | 2011-12-28 | 浙江省电力公司 | Artificial verification system |
| CN102636769A (en) * | 2012-04-18 | 2012-08-15 | 山东电力研究院 | Error counter for electric energy meter and error counting method |
| CN104101857A (en) * | 2014-07-01 | 2014-10-15 | 杭州电子科技大学 | FlexRay bus-based electric energy meter error detection system and method |
| CN109557501A (en) * | 2019-01-31 | 2019-04-02 | 广东电网有限责任公司 | A kind of centralized time dissemination system for electric energy meter automatic calibrator |
Citations (5)
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|---|---|---|---|---|
| US6633825B2 (en) * | 2001-06-29 | 2003-10-14 | Siemens Power Transmission & Distribution, Inc. | Automatic calibration of time keeping for utility meters |
| CN101738593A (en) * | 2009-12-07 | 2010-06-16 | 河南思达高科技股份有限公司 | Standard energy meter and correcting method of sampled signals thereof |
| CN201698018U (en) * | 2010-07-20 | 2011-01-05 | 威胜集团有限公司 | Digitized field electricity meter inspection system |
| CN101957439A (en) * | 2010-02-10 | 2011-01-26 | 江西省电力科学研究院 | Sampling and calculating separated type electric energy meter calibrating method and electric energy meter site parameter recorder |
| CN202025192U (en) * | 2011-01-31 | 2011-11-02 | 浙江省电力公司 | Clock system standard source |
-
2011
- 2011-01-31 CN CN2011100344320A patent/CN102081153B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6633825B2 (en) * | 2001-06-29 | 2003-10-14 | Siemens Power Transmission & Distribution, Inc. | Automatic calibration of time keeping for utility meters |
| CN101738593A (en) * | 2009-12-07 | 2010-06-16 | 河南思达高科技股份有限公司 | Standard energy meter and correcting method of sampled signals thereof |
| CN101957439A (en) * | 2010-02-10 | 2011-01-26 | 江西省电力科学研究院 | Sampling and calculating separated type electric energy meter calibrating method and electric energy meter site parameter recorder |
| CN201698018U (en) * | 2010-07-20 | 2011-01-05 | 威胜集团有限公司 | Digitized field electricity meter inspection system |
| CN202025192U (en) * | 2011-01-31 | 2011-11-02 | 浙江省电力公司 | Clock system standard source |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102298135A (en) * | 2011-07-22 | 2011-12-28 | 浙江省电力公司 | Artificial verification system |
| CN102636769A (en) * | 2012-04-18 | 2012-08-15 | 山东电力研究院 | Error counter for electric energy meter and error counting method |
| CN102636769B (en) * | 2012-04-18 | 2014-08-27 | 山东电力研究院 | Error counter for electric energy meter and error counting method |
| CN104101857A (en) * | 2014-07-01 | 2014-10-15 | 杭州电子科技大学 | FlexRay bus-based electric energy meter error detection system and method |
| CN109557501A (en) * | 2019-01-31 | 2019-04-02 | 广东电网有限责任公司 | A kind of centralized time dissemination system for electric energy meter automatic calibrator |
Also Published As
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|---|---|
| CN102081153B (en) | 2013-12-04 |
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Owner name: STATE GRID CORPORATION OF CHINA Effective date: 20121231 |
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Effective date of registration: 20121231 Address after: 310007 Huanglong Road, Hangzhou, Zhejiang, No. 8, No. Applicant after: Zhejiang Electric Power Company Applicant after: State Grid Corporation of China Address before: 310007 Huanglong Road, Hangzhou, Zhejiang, No. 8, No. Applicant before: Zhejiang Electric Power Company |
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