CN204740339U - A 0. 02 grade of miniature standard electric energy meter for examineing and determine single -phase intelligent ammeter calibrating installation - Google Patents
A 0. 02 grade of miniature standard electric energy meter for examineing and determine single -phase intelligent ammeter calibrating installation Download PDFInfo
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- CN204740339U CN204740339U CN201520428566.4U CN201520428566U CN204740339U CN 204740339 U CN204740339 U CN 204740339U CN 201520428566 U CN201520428566 U CN 201520428566U CN 204740339 U CN204740339 U CN 204740339U
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Abstract
The utility model relates to a 0.02 grade of miniature standard electric energy meter for examineing and determine single -phase intelligent ammeter calibrating installation, voltage acquisition device connect calibrating installation's voltage output end, and the input of AD converter is connected to the output of voltage acquisition device, and the output of AD converter is connected to DSP's input, current collection device connects calibrating installation's current output terminal, and the input of AD converter is connected to current collection device's output, and the output of AD converter is connected to DSP's input, DSP digital processing technique, accuracy class are 0.02 grade, and frequency generator's input is connected to DSP's output, and the DSP output is connected to the pulse interface. The utility model relates to a science, simple operation, accurate reliable are checied during can realizing going on electric energy metering device or instrument and equipment, and effectively firm energy quantity transmission is accurate, reliable, is showing the detection efficiency and the detection accuracy that promote the detecting system accuracy to effectively promote whole detection achievement efficiency.
Description
Technical field
The utility model belongs to electrical measurement, instrument field, especially a kind of 0.02 grade of miniature standard electric energy meter for examining and determine single-phase intelligent electric energy meter calibrating installation.
Background technology
Electric energy has become that human society depends on for existence and development must indispensable a kind of important energy source, all activities of the mankind nearly all have close relationship with electricity, and electric energy meter detects the direct measuring instrument that electric energy uses standard, how to ensure that accurate, efficient, the effort of electrical energy meter calibration improve the verification efficiency of electric energy meter, just become pendulum needs solution badly problem in gauge check department at different levels.
In order to keep the reliability of electric power meter, testing apparatus, ensure electric energy value traceability and transitivity accurately and reliably, periodically examining and determine instrument and equipment according to relevant regulations stipulate, calibrate is one of effective way.Generally, in the check-verifying period of electric energy meter calibrating apparatus, electric energy metrical instrument equipment can normally work, the continual and steady of metering performance can be kept, but in actual use, due to the impact of the many factors such as method of operating, environmental baseline, frequency of utilization, transport, vibration, the performance of instrument and equipment may be made to change, ND fault and accident even occur.In order to ensure metrological standard unit, measuring equipment in twice calibrating, calibration intervals accurately and reliably, and keep good degree of confidence, correlometer gauge model is proposed verification request during measurement standard and measuring equipment.
Period verifies the confidence level referred to as keeping equipment Alignment state, between adjacent twice calibrating, calibration, and verification standard or measuring equipment carried out by suitable check standard and suitable method.It is the every metering performance index whether keeping when calibrating last time in order to judgment device that period verifies, and ensures that measuring process is controlled, guarantee transmission of quantity value accurately and reliably and degree of confidence.At present, the method that period verifies adopts detection of being reached the standard grade by electric energy meter to be measured, detection line is provided with and tens ofly reaches the standard grade detection demand to meet a large amount of electric energy meter to hundreds checkout equipment, the calibration of the accuracy of detection of this multiple stage checkout equipment itself becomes the another difficult problem ensureing electric energy meter accuracy of detection, because the volume of existing equipment own is large, weight large, it is mobile to be difficult to, need to carry out dismounting, wiring, calibration detection to checkout equipment respectively by manually carrying correcting device, often each calibration cycle time is long, and labor workload is large, inefficiency.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art part, provides a kind of design science, compact, accurately and reliably for examining and determine 0.02 grade of miniature standard electric energy meter of single-phase intelligent electric energy meter calibrating installation.
The utility model solves its technical matters and takes following technical scheme to realize:
A kind of 0.02 grade of miniature standard electric energy meter for examining and determine single-phase intelligent electric energy meter calibrating installation, it is characterized in that: comprise voltage collecting device, current collecting device, A/D converter, DSP, pulse interface and communication interface, voltage collecting device connects the voltage output end of calibrating installation, the output terminal of voltage collecting device connects the input end of A/D converter, and the output terminal of A/D converter is connected to the input end of DSP; Current collecting device connects the current output terminal of calibrating installation, and the output terminal of current collecting device connects the input end of A/D converter, and the output terminal of A/D converter is connected to the input end of DSP; DSP digital processing class of accuracy is 0.02 grade, the input end of the output terminal rate of connections generator of DSP, and DSP output terminal is connected to pulse interface, and this pulse interface gathers terminal for the real power value numerical value connecting calibrating installation; The output terminal of DSP is also connected with a communication interface.
And described voltage collecting device is divider resistance.
And described current collecting device is current transformer.
And described communication interface is 485 communication interfaces, the baud rate of this 485 communication interface is 9600.
Advantage of the present utility model and good effect are:
1, this method can verify electric energy meter calibrating apparatus and automatic calibration of electric energy meter systematic error, the fundamental error of calibrating verification electric energy meter calibrating apparatus and automatic calibration of electric energy meter system.
2, this method possesses dynamic kernel to function, when system calibration electric energy meter, standard electric energy meter is dynamically mixed in tested table as blind table, circulate in systems in which, enter calibrating unit at random, different epi-position error is monitored in real time, ensure calibrating data accurately and reliably.
3, this method adopts multiple-channel output consistency check, by the circulation of standard electric energy meter in the different epi-position of calibrating unit, tests out the error of corresponding epi-position, thus calculates the multiple-channel output consistance of automatic calibration of electric energy meter system.
4, the utility model design science, simple operation, accurately and reliably, can realize carrying out period to electric power meter or instrument and equipment to verify, effectively can ensure that electric flux value transmit accurately, reliably, remarkable lifting to the detection efficiency of detection system accuracy and detection accuracy, thus effectively promotes whole detection work efficiency.
Accompanying drawing explanation
Fig. 1 is structural front view of the present utility model;
Fig. 2 is the right view (broken section) of Fig. 1;
Fig. 3 is the inner structure schematic diagram of Fig. 1;
Fig. 4 be Fig. 1 look up structural representation;
Fig. 5 is circuit theory diagrams of the present utility model;
Fig. 6 is copper post terminal connection diagram;
Fig. 7 is pin terminal wiring diagram.
Embodiment
Below in conjunction with accompanying drawing, also by specific embodiment, the utility model is described in further detail, and following examples are descriptive, are not determinate, can not limit protection domain of the present utility model with this.
A kind of 0.02 grade of miniature standard electric energy meter for examining and determine single-phase intelligent electric energy meter calibrating installation, measure-alike all with Q/GDW 1355-2013 single-phase intelligent electric energy meter shell of the length of the physical dimension of this electric energy meter, length × wide × height=160 × 112 × 58mm, Q/GDW 1355-2013 single-phase intelligent electric energy meter is state's net 2013 electric energy meter general at present, so that can be arranged on the electric energy meter tray of existing verification system electric power meter, be convenient in automatic calibration system, automatically disconnect line and circulate;
Be described with direction shown in accompanying drawing 1, watchcase 1 main body is a cube structure, a reserved viewing area 3 is fixed with in watchcase upper front end, reserved bottom, viewing area is provided with multiple pilot lamp 2, the pilot lamp of the present embodiment is respectively the power light whether display is energized, and for showing the pulse pilot lamp of pulse signal;
Watchcase front center below reserved viewing area is provided with bar code screen 4, this bar code screen is for showing the special bar code of this standard electric energy meter to distinguish with normal electric energy meter, by standard electric energy meter Data Enter verification system, automatically can identify according to blind table bar code when upper table.
The watchcase shielding horizontal side in bar code is provided with one button 5 is set, for arranging the bar code information of this standard electric energy meter.
In the watchcase bottom of bar code screen below, one transparent shroud 7 is installed, the connection terminal of standard electric energy meter can be observed through this transparent shroud.
Flimsy connection terminal is held for the ease of safeguarding to replace, shown in accompanying drawing 2, this transparent shroud upper end is contained in lower housing portion by hinge 10 hinge of a horizontally set, one bolt be connected with housing 9 is installed in the middle part of transparent shroud, tightening this bolt is fixed on housing by transparent shroud, unscrew transparent shell when removing this bolt can rotation open forward, change or adjustment connection terminal.
The connection terminal of this standard electric energy meter is arranged identical with unidirectional intelligent electric energy meter connection terminal, see accompanying drawing 3, accompanying drawing 4, accompanying drawing 6 and accompanying drawing 7,4 copper post sockets 6 are installed in housing lower-end rear portion lateral separation, copper styletable 1,2,3,4 shown in connection respective figure 6 of these 4 copper post sockets, housing lower-end front portion lateral separation is uniform is provided with 8 contact pin jacks 12, these 8 contact pin jacks pin terminal 5 to 12 shown in respective figure 7 respectively.
Copper post socket and contact pin jack are connected respectively to the mainboard 15 be arranged in housing, this mainboard is provided with divider resistance, and mainboard is installed and is connected copper coin, connect copper coin 13 and be communicated with current transformer 14, the mainboard of the horizontal side of current transformer is provided with core/power panel 11, and this core/power panel comprises internal power supply and the digital signal processor DSP of standard electric energy meter.
Be placed on pallet normal place for the ease of stable, be fixed with a spacing draw-in groove 8 on housing rear end top, ensure to detect positional accuracy.
The present embodiment Plays electric energy meter circuit connect and principle of work shown in Figure 1:
The voltage output end of copper post socket connects the input end of divider resistance by wire, the output terminal of divider resistance connects the input end of A/D converter, the output terminal of A/D converter is connected to the input end of DSP, voltage exports and samples through electric resistance partial pressure, after becoming small-signal, do A/D conversion and send DSP process; DSP is digital signal processor.
The current output terminal of copper post socket is connected to current transformer 14 by connecting copper coin 13, the output terminal of this current transformer connects the input end of A/D converter, the output terminal of A/D converter is connected to the input end of DSP, electric current exports after current transformer sampling becomes small-signal, does A/D conversion and send DSP process;
The input end of the output terminal rate of connections generator of DSP, DSP synchronously carries out U, I real-time operation, obtain real power value P, and by frequency division generation high-frequency electrical energy pulse and the low-frequency electrical energy pulse respectively of P controlled frequency generator, the ratio that frequency generator produces exports as electric energy high impulse higher than the high-frequency impulse of P, obtaining ratio lower than the low pulse of low-frequency electrical energy of P by frequency divider frequency division is the low pulse of electric energy, above-mentioned high and low frequency electrical energy pulse outputs to pulse interface, output interface position is pin terminal 7 and 8 position, shown in accompanying drawing 7 pin terminal wiring diagram;
The output terminal of DSP is also connected with 485 communication interfaces, and the baud rate of this 485 communication interface is 9600.While measuring P, DSP also completes the measurement of voltage, current true virtual value phase place, frequency etc., this measured value amount sends robotization calibration streamline to by 485 communication interfaces, and 485 communication interface positions are pin terminal 11 and pin terminal 12, sees shown in accompanying drawing 7 pin terminal wiring diagram.
This standard electric energy meter possesses following functions feature:
1. wide-range: current measuring range: 0.3A ~ 100A or 0.15A ~ 60A;
2. pin-point accuracy: adopt high-precision AD conversion to add DSP digital processing technology, class of accuracy: 0.02 grade;
3. low-power consumption: voltage circuit: <3W (6VA); Current circuit: <1.5VA;
4. wide service area: 45V ~ 460V alternating voltage is powered;
5. standard apparent size: adopt the outward appearance identical with intelligent electric energy meter and size, meets state's net 2013 electric energy meter pattern specification, is convenient in automatic calibration system, automatically disconnect line and circulate.
6. communication interface: RS485, baud rate 9600, can be arranged.
The verifying process flow step of this standard electric energy meter on verification system electric power meter is as follows:
(1) prepare: the standard electric energy meter arranging single-phase intelligent electric energy meter, the precision of this standard electric energy meter is 0.02 grade, and the electric energy meter that general resident uses, normal tasks electric energy meter namely to be detected is 2 grades, and standard electric energy meter precision is far above task electric energy meter;
Special bar code is formulated to standard electric energy meter, to distinguish with normal table; By standard electric energy meter Data Enter verification system, automatically can identify according to blind table bar code when upper table;
(2) fill table: table position place on the streamline run, on the empty pallet manually standard electric energy meter being put into arbitrarily or specifying, then standard electric energy meter pallet is put into bindings bit and normal task electric energy meter and mix at random and flow into automatic calibration line body;
(3) bind: standard electric energy meter is after bindings bit, and streamline server can be bound the information of the bar code number of standard electric energy meter and this pallet according to the scheme pre-set;
(4) test: standard electric energy meter flows through on streamline after each test special machine, and transfer matic can perform according to predetermined testing program, selects to do experiment to standard electric energy meter or do not do experiment;
(5) following table: standard electric energy meter is after test finished by each special plane, streamline enters following table flow process according to the flow process of setting, standard electric energy meter is after flowing through following table flow process, PLC can automatically according to the standard electric energy meter on this pallet of binding information identification, do not perform following table flow process, but standard electric energy meter pallet is let pass automatically, standard electric energy meter pallet can flow through bindings bit automatically, and circulation performs step flow process (3), (4), (5);
(6) data processing: the calibrating data of standard electric energy meter are inquired about in systems in which according to task number and standard electric energy meter bar code, obtains and specifies the data of electric power meter and derive this calibrating data.
Although disclose embodiment of the present utility model and accompanying drawing for the purpose of illustration, but it will be appreciated by those skilled in the art that: in the spirit and scope not departing from the utility model and claims, various replacement, change and amendment are all possible, therefore, scope of the present utility model is not limited to the content disclosed in embodiment and accompanying drawing.
Claims (4)
1., for examining and determine 0.02 grade of miniature standard electric energy meter of single-phase intelligent electric energy meter calibrating installation, it is characterized in that: comprise voltage collecting device, current collecting device, A/D converter, DSP, pulse interface and communication interface,
Voltage collecting device connects the voltage output end of calibrating installation, and the output terminal of voltage collecting device connects the input end of A/D converter, and the output terminal of A/D converter is connected to the input end of DSP;
Current collecting device connects the current output terminal of calibrating installation, and the output terminal of current collecting device connects the input end of A/D converter, and the output terminal of A/D converter is connected to the input end of DSP;
DSP digital processing class of accuracy is 0.02 grade, the input end of the output terminal rate of connections generator of DSP, and DSP output terminal is connected to pulse interface, and this pulse interface gathers terminal for the real power value numerical value connecting calibrating installation; The output terminal of DSP is also connected with a communication interface.
2. 0.02 grade of miniature standard electric energy meter for examining and determine single-phase intelligent electric energy meter calibrating installation according to claim 1, is characterized in that: described voltage collecting device is divider resistance.
3. 0.02 grade of miniature standard electric energy meter for examining and determine single-phase intelligent electric energy meter calibrating installation according to claim 1, is characterized in that: described current collecting device is current transformer.
4. 0.02 grade of miniature standard electric energy meter for examining and determine single-phase intelligent electric energy meter calibrating installation according to claim 1, is characterized in that: described communication interface is 485 communication interfaces, and the baud rate of this 485 communication interface is 9600.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520428566.4U CN204740339U (en) | 2015-06-19 | 2015-06-19 | A 0. 02 grade of miniature standard electric energy meter for examineing and determine single -phase intelligent ammeter calibrating installation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520428566.4U CN204740339U (en) | 2015-06-19 | 2015-06-19 | A 0. 02 grade of miniature standard electric energy meter for examineing and determine single -phase intelligent ammeter calibrating installation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110568396A (en) * | 2019-03-11 | 2019-12-13 | 河南省计量科学研究院 | Installation type standard meter and system and method for calibration by using same |
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- 2015-06-19 CN CN201520428566.4U patent/CN204740339U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110568396A (en) * | 2019-03-11 | 2019-12-13 | 河南省计量科学研究院 | Installation type standard meter and system and method for calibration by using same |
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