CN210051885U - Electric energy data lossless digital direct current electric energy meter and field calibration system - Google Patents
Electric energy data lossless digital direct current electric energy meter and field calibration system Download PDFInfo
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- CN210051885U CN210051885U CN201920256091.3U CN201920256091U CN210051885U CN 210051885 U CN210051885 U CN 210051885U CN 201920256091 U CN201920256091 U CN 201920256091U CN 210051885 U CN210051885 U CN 210051885U
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Abstract
The utility model discloses a satisfy online check-up process electric energy data harmless digital direct current electric energy meter and on-the-spot check-up system, be equipped with the data forwarding device switch on the digital direct current electric energy meter, the signal processing unit, the data forwarding device switch includes the sampling data receiving terminal, signal processing unit output and on-the-spot check-up appearance output, the signal processing unit output is connected with the signal processing unit, the system is still including the on-the-spot school appearance of examining, on-the-spot school appearance of examining one end and data forwarding device switch connection, the other end is used for detecting the pulse indicator lamp on the digital direct current electric energy meter. According to the method and the device, the digital direct current electric energy meter is transformed, so that the digital direct current electric energy meter can supply the minimum output power for the field calibrator while performing detection work, further, the sampling signal received by the tested digital electric energy meter is not required to be interrupted in the field calibration process, the electric energy data loss caused by short shutdown of the tested digital electric energy meter in the field calibration process is prevented, and the accuracy of electric energy metering and equipment loss energy efficiency analysis is improved.
Description
Technical Field
The utility model relates to a testing technique field, concretely relates to satisfy online check-up process electric energy data harmless digital direct current electric energy meter and on-the-spot check-up system.
Background
The digital electric energy meter is essentially a data processing or calculator, any computing equipment endowed with a metering unit is a metering appliance, and the digital electric energy calculator is an electric energy metering appliance after being endowed with a kWh unit, so that the problem of 'tracing' exists. According to the traceability concept, the digital electric energy meter should have comparability with the superior electric energy standard.
The digital electric energy meter directly receives the sampling data of the electronic transformer uploaded by the merging unit, the measured electric energy meter calculates a measured value through an internal module of the electric energy meter after receiving a data frame sent by the merging unit sending module, the measured value is sent to the pulse acquisition module to be compared and analyzed with the data of the standard electric energy meter for multiple times, and a more accurate measurement error is obtained through an accumulation and averaging method.
The digital electric energy meter is required to be periodically tested on site after being installed on site, and the site test is different from the traditional analog electric energy meter in that signals received by the digital electric energy meter are digital quantity, and sampling signals received by the tested digital electric energy meter need to be interrupted for comparison with a standard electric energy meter in the site test process, so that the tested electric energy meter is temporarily stopped in the site test process to lose part of electric energy data, and the accuracy of electric energy measurement and the analysis of equipment loss energy efficiency are seriously influenced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a not enough to prior art, the utility model provides a satisfy online check-up process electric energy data harmless digit direct current electric energy meter and on-the-spot check-up system.
In order to achieve the above purpose, the technical scheme of the utility model is that:
the utility model provides a satisfy on-line check-up process electric energy data lossless digital direct current electric energy meter, is equipped with data forwarding device switch, signal processing unit and pulse indicator lamp on the digital direct current electric energy meter, the data forwarding device switch is opened so that digital direct current electric energy meter gets into on-the-spot check mode of operation, be equipped with current and voltage sampling data receiving terminal, current and voltage sampling data signal processing unit output and current and voltage sampling data on-the-spot check-up appearance output in the data forwarding device switch, current and voltage sampling data signal processing unit output is connected with signal processing unit.
The utility model provides a satisfy on-line verification process electric energy data harmless on-the-spot calibration system, includes foretell digital direct current electric energy meter, still including the on-the-spot appearance of checking, be equipped with on-the-spot appearance current voltage sampling data receiving terminal of checking and the pulse receiving terminal of being examined on the on-the-spot appearance of checking, current voltage sampling data on-the-spot check appearance output is connected with on-the-spot appearance current voltage sampling data receiving terminal of checking, the pulse receiving terminal of being examined is used for detecting the pulse pilot lamp on the digital direct current electric energy meter.
Further, the output energy of the output end of the current and voltage sampling data signal processing unit is not less than the minimum receiving energy of the signal processing unit.
Further, the output energy of the output end of the current-voltage sampling data field calibrator is not less than the minimum receiving energy of the field calibrator.
Further, the output energy of the output end of the current and voltage sampling data signal processing unit is 60% of the input energy of the current and voltage sampling data receiving end, and the output energy of the output end of the current and voltage sampling data on-site calibrator is 40% of the input energy of the current and voltage sampling data receiving end.
Compared with the prior art, the utility model, have following advantage:
according to the method and the device, the digital direct current electric energy meter is transformed, so that the digital direct current electric energy meter can supply the minimum output power for the field calibrator while performing detection work, further, the sampling signal received by the tested digital electric energy meter is not required to be interrupted in the field calibration process, partial electric energy data loss caused by short outage of the tested digital electric energy meter in the field calibration process is prevented, and the accuracy of electric energy metering and equipment loss energy efficiency analysis is effectively improved.
Drawings
FIG. 1 is a schematic structural diagram of a digital direct current electric energy meter which satisfies the condition that electric energy data in an online verification process are lossless;
FIG. 2 is a schematic structural diagram of the present on-site calibration system for on-line calibration process without loss of power data;
description of reference numerals: 1. a digital direct current electric energy meter; 2. a field calibrator; 21. a current and voltage sampling data receiving end of the field calibration instrument; 22. a tested pulse receiving end; 3. a signal processing unit; 4. a data forwarding device switch; 41. the output end of the current and voltage sampling data signal processing unit; 42. a current and voltage sampling data receiving end; 43. the current and voltage sampling data field calibrator output end; 5. a pulse indicator light; 6. and a merging unit.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
Examples
As shown in fig. 1, a digital dc power meter satisfying the condition of no loss of power data in the online verification process is provided, a data forwarding device switch 4, a signal processing unit 3 and a pulse indicator lamp 5 are provided on the digital dc power meter 1, the data forwarding device switch 4 is turned on to enable the digital dc power meter 1 to enter a field verification working mode, the data forwarding device switch 4 is turned off to enable the digital dc power meter 1 to enter a conventional working mode, a current and voltage sampling data receiving terminal 42, a current and voltage sampling data signal processing unit output terminal 41 and a current and voltage sampling data field verifier output terminal 43 are provided in the data forwarding device switch 4, and the current and voltage sampling data signal processing unit output terminal 41 is connected with the signal processing unit 3.
As shown in fig. 2, an on-site calibration system satisfying the lossless of the electric energy data in the on-line calibration process includes the above-mentioned digital dc electric energy meter 1, and further includes an on-site calibration instrument, the on-site calibration instrument is provided with an on-site calibration instrument current and voltage sampling data receiving end 21 and a tested pulse receiving end 22, the current and voltage sampling data on-site calibration instrument output end 43 is connected with the on-site calibration instrument current and voltage sampling data receiving end 21, the tested pulse receiving end 22 is used for detecting the pulse indicator lamp 5 on the digital dc electric energy meter 1, and the current and voltage sampling data receiving end 42 is used for receiving the output capability of the merging unit 6, so as to detect the value of the merging unit 6 by using the digital dc electric energy meter 1.
The parameters of the digital dc electric energy meter 1 adopted in the embodiment are as follows: the minimum receiving power of a sampling value signal is 1.6dBm, the light energy forwarding efficiency of the data forwarding device in a conventional working mode is 100%, the light energy forwarding efficiency of the data forwarding device in a checking working mode is 60%, and the light energy forwarding efficiency of the data forwarding device in the checking working mode is 40%; the parameters of the on-site calibrator 2 are: the minimum receiving power of the sampling value signal is 1.45dBm, the minimum output power of the standard signal is 30dBm, and the pulse receiving mode is optical pulse.
In order to satisfy the minimum received power of the digital dc power meter 1 and the minimum received power of the field check meter 2, the output energy of the output terminal 41 of the current-voltage sampling data signal processing unit is not less than the minimum received energy of the signal processing unit 3 and the output energy of the output terminal 43 of the current-voltage sampling data field check meter is not less than the minimum received energy of the field check meter 2, wherein the conversion formula of power and energy is XmW dblgxm.
In summary, the output energy of the output terminal 41 of the current-voltage sampling data signal processing unit is set to be 60% of the input energy of the current-voltage sampling data receiving terminal 42, and the output energy of the output terminal 43 of the current-voltage sampling data on-site calibrator is set to be 40% of the input energy of the current-voltage sampling data receiving terminal 42.
Taking a common merging unit with the lowest actual output power at the output end of 20dBm as an example (energy is 100mW, energy is 100%, the calculation mode is that 100mW is 10 × lg100 is 20dBm), the digital direct current electric energy meter 1 is in the field check operating mode, the power which can be output by the output end 41 of the current-voltage sampling data signal processing unit is 17.8dBm (energy is 60mW, i.e. energy loss is 40%, the calculation mode is that 60mW is 10 × lg60 is 17.8dBm), the signal received by the signal processing unit 3 is greater than the minimum receiving power value 16dBm of the digital direct current electric energy meter 1 (energy is 40mW, i.e. the digital direct current electric energy meter can operate by receiving 40% of energy at the minimum, and the calculation mode is that 40mW is 10 × lg40 is 16dBm), and the requirement of the signal processing unit 3 of the digital direct current electric energy meter 1 can be met; the current-voltage sampling data field check meter output end 43 can output a signal with power of about 16dBm (energy is 40mW, i.e. energy loss is 60%, the calculation mode: 40mW is 10 × lg40 is 16dBm), the signal received by the field check meter current-voltage sampling data receiving end 21 is greater than the minimum receiving power value 14.5dBm of the field check meter 2 (energy is 30mW, i.e. the field check meter can work by receiving 30% of energy at the minimum, the calculation mode: 30mW is 10 × lg30 is 14.78dBm), and the requirement of normal work of the field check meter 2 can be met.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (5)
1. The utility model provides a satisfy on-line verification process electric energy data lossless digital direct current electric energy meter which characterized in that: be equipped with data forwarding device switch (4), signal processing unit (3) and pulse indicator lamp (5) on digital direct current electric energy meter (1), data forwarding device switch (4) are opened so that digital direct current electric energy meter (1) gets into on-the-spot check work pattern, be equipped with current and voltage sampling data receiving terminal (42), current and voltage sampling data signal processing unit output (41) and current and voltage sampling data on-the-spot check gauge output (43) in data forwarding device switch (4), current and voltage sampling data signal processing unit output (41) are connected with signal processing unit (3).
2. An on-site verification system for satisfying the condition of no damage to electric energy data in an on-line verification process, comprising the digital direct current electric energy meter (1) as set forth in claim 1, wherein: the device is characterized by further comprising a field calibration instrument, wherein the field calibration instrument is provided with a field calibration instrument current and voltage sampling data receiving end (21) and a tested pulse receiving end (22), the current and voltage sampling data field calibration instrument output end (43) is connected with the field calibration instrument current and voltage sampling data receiving end (21), and the tested pulse receiving end (22) is used for detecting a pulse indicator lamp (5) on the digital direct current electric energy meter (1).
3. The on-site verification system for satisfying on-line verification process electric energy data loss requirement of claim 2, characterized in that: the output energy of the output end (41) of the current and voltage sampling data signal processing unit is not less than the minimum receiving energy of the signal processing unit (3).
4. The on-site verification system for satisfying on-line verification process electric energy data loss requirement of claim 2, characterized in that: the output energy of the output end (43) of the current and voltage sampling data field calibrator is not less than the minimum received energy of the field calibrator (2).
5. The on-site verification system for on-line verification of process power data non-loss according to any one of claims 3 or 4, wherein: the output energy of the output end (41) of the current and voltage sampling data signal processing unit is 60% of the input energy of the current and voltage sampling data receiving end (42), and the output energy of the output end (43) of the current and voltage sampling data on-site calibrator is 40% of the input energy of the current and voltage sampling data receiving end (42).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109856588A (en) * | 2019-02-28 | 2019-06-07 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | It is a kind of to meet on-line testing process energy data lossless digital DC electric energy meter and field calibration system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109856588A (en) * | 2019-02-28 | 2019-06-07 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | It is a kind of to meet on-line testing process energy data lossless digital DC electric energy meter and field calibration system |
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