CN102749500A - Industrial alternating-current (AC) ampere meter - Google Patents
Industrial alternating-current (AC) ampere meter Download PDFInfo
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- CN102749500A CN102749500A CN2012102634479A CN201210263447A CN102749500A CN 102749500 A CN102749500 A CN 102749500A CN 2012102634479 A CN2012102634479 A CN 2012102634479A CN 201210263447 A CN201210263447 A CN 201210263447A CN 102749500 A CN102749500 A CN 102749500A
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Abstract
The invention discloses an industrial alternating-current (AC) ampere meter which comprises a current transformer, a circuit of current to be tested, a signal amplifier, a microprocessor and a digital display tube, wherein the section of the current transformer is of an annular structure, the circuit of current to be tested passes through a cylindrical hollow structure of the current transformer, an output end of the current transformer is earthed through a circuit, and the other output end of the current transformer is connected with the signal amplifier, the microprocessor and the digital display tube in sequence through circuits. The industrial AC ampere meter disclosed by the invention can reach grade 0.5 in accuracy.
Description
Technical field
The invention belongs to the Power Electronic Technique detection range, specifically, relate to a kind of industrial alternating current detection table.
Background technology
Reometer is the instrument of size of current in the metering circuit.Alternating current ammeter mainly adopt the electromagnetic system ammeter, electronic be the measuring mechanism of ammeter and rectifier type ammeter.The minimum range of electromagnetic system measuring mechanism is about tens milliamperes, for improving range, reduce coil turn in proportion, and add heavy gauge wire.With electronic be measuring mechanism when constituting reometer, moving-coil is parallelly connected with quiet circle, its minimum range is about tens milliamperes.For improving range, reduce the quiet circle number of turn, and add heavy gauge wire, or change two Jing Quan into parallel connection by series connection, then the range of reometer will increase and be twice.During with rectifier type ammeter test cross stream electric current, only when exchanging to sinusoidal waveform, the reometer reading is just correct.Be range extension shunt also capable of using.In addition, also available thermoelectric (al) type ammeter measuring mechanism is measured high-frequency current.Mostly the wide range alternating current ammeter that in electric system, uses is the electromagnetic system reometer with 5A or 1A.
All there is instrument error in every kind of surveying instrument, all can introduce uncertain composition in the time of measure physical quantities, and the available formula of uncertainty size of reometer provides: △=A*a%, and wherein A representes range, a representes class of accuracy.Active electric energy meter commonly used has 0.5,1.0,2.0 3 class of accuracy.0.5 level electric energy meter permissible error is in ± 0.5%; 1.0 level electric energy meter permissible error is in ± 1%; 2.0 level electric energy meter permissible error is in ± 2%.
Present industrial alternating current ammeter, the class of accuracy of its measurement is difficult to reach 0.5 grade.
Summary of the invention
Technical matters to be solved by this invention provides the industrial alternating current detection table that a kind of class of accuracy can reach 0.5 grade.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: industrial alternating current detects table; Comprise current transformer, current circuit to be measured, signal amplifier, microprocessor, digital display tube; The cross section of said current transformer is the structure of annulus; Current circuit to be measured passes the hollow structure of the cylindrical shape of current transformer; An output terminal of current transformer is through line-to-ground, and another output terminal of current transformer is connected with signal amplifier, microprocessor, digital display tube through circuit successively.
Further, also comprise host computer, host computer is connected through circuit and microprocessor.
Said host computer is computing machine or PLC.
Also comprise warning device, warning device is connected through circuit and microprocessor.This warning device can be through importing alarm current on microprocessor, surpass to set upper current limit or measure electric current and be lower than when setting lower current limit when measuring electric current, reports to the police through warning device.Avoid the overvoltage of commercial unit or the operation under the low pressure, cause the damage of commercial unit.In order further to guarantee the safety of commercial unit, can also quit work through computing machine or PLC control this electricity consumption when warning device is reported to the police commercial unit.
Be equipped with wireless transport module on said microprocessor, the host computer, microprocessor, host computer carry out data transmission through wireless transport module.
Compared with prior art, the present invention has the following advantages and beneficial effect: the class of accuracy of industrial alternating current detection table of the present invention can reach 0.5 grade.
Description of drawings
Fig. 1 is a structural representation of the present invention.
The parts title that label is corresponding in the accompanying drawing is: the 1-current transformer; 2-current circuit to be measured; The 3-signal amplifier; The 4-microprocessor; The digital display tube of 5-; The 7-host computer; The 8-wireless transport module; The 9-warning device.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is done to specify further, but embodiment of the present invention is not limited thereto.
Embodiment 1:
As shown in Figure 1; The industrial alternating current detection table of present embodiment comprises current transformer 1, current circuit to be measured 2, signal amplifier 3, microprocessor (MCU) 4, digital display tube 5, host computer 7, warning device 9; Said current transformer 1 is the shape of a cylinder; Hollow structure with cylindrical shape, the cross section of current transformer 1 is the structure of annulus, and current circuit 2 to be measured passes the hollow structure of the cylindrical shape of current transformer 1; An output terminal of current transformer 1 is through line-to-ground, and another output terminal of current transformer 1 is connected with signal amplifier 3, microprocessor 4, digital display tube 5 through circuit successively; Host computer 7, warning device 9 are connected through circuit and microprocessor 4 respectively.
Said host computer 7 is computing machine or PLC.
Embodiment 2:
As shown in Figure 1; The industrial alternating current detection table of present embodiment comprises current transformer 1, current circuit to be measured 2, signal amplifier 3, microprocessor (MCU) 4, digital display tube 5, host computer 7, warning device 9; Said current transformer 1 is the shape of a cylinder; Hollow structure with cylindrical shape, the cross section of current transformer 1 is the structure of annulus, and current circuit 2 to be measured passes the hollow structure of the cylindrical shape of current transformer 1; An output terminal of current transformer 1 is through line-to-ground, and another output terminal of current transformer 1 is connected with signal amplifier 3, microprocessor 4, digital display tube 5 through circuit successively; Warning device 9 is connected through circuit and microprocessor 4.
Said host computer 7 is computing machine or PLC.
Be equipped with wireless transport module 8 on said microprocessor 4, the host computer 7, microprocessor 4, host computer 7 carry out data transmission through wireless transport module 8.
Embodiment 3:
As shown in Figure 1; The industrial alternating current detection table of present embodiment comprises current transformer 1, current circuit to be measured 2, signal amplifier 3, microprocessor (MCU) 4, digital display tube 5, host computer 7, warning device 9; Said current transformer 1 is the shape of a cylinder; Hollow structure with cylindrical shape, the cross section of current transformer 1 is the structure of annulus, and current circuit 2 to be measured passes the hollow structure of the cylindrical shape of current transformer 1; An output terminal of current transformer 1 is through line-to-ground, and another output terminal of current transformer 1 is connected with signal amplifier 3, microprocessor 4, digital display tube 5 through circuit successively; Host computer 7, warning device 9 are connected through circuit and microprocessor 4 respectively.
Be equipped with wireless transport module 8 on said microprocessor 4, the host computer 7, microprocessor 4, host computer 7 carry out data transmission through wireless transport module 8.
Said host computer 7 is computing machine or PLC.
In the foregoing description, embodiment 1 adopts wire transmission mode transmission data, and embodiment 2 adopts the mode of wirelessly transmitting data to transmit data, and the mode that embodiment 3 adopts wire/wireless to combine is transmitted data.The industrial alternating current detection table of employing embodiment 1-3 detects the circuit of a current known, measures the result and shows that the class of accuracy of the industrial alternating current detection table of embodiment 1-3 can reach 0.5 grade.
As stated, just can realize the present invention preferably.
Claims (5)
1. industrial alternating current detects table; It is characterized in that: comprise current transformer (1), current circuit to be measured (2), signal amplifier (3), microprocessor (4), digital display tube (5); The cross section of said current transformer (1) is the structure of annulus; Current circuit to be measured (2) passes the hollow structure of the cylindrical shape of current transformer (1); An output terminal of current transformer (1) is through line-to-ground, and another output terminal of current transformer (1) is connected with signal amplifier (3), microprocessor (4), digital display tube (5) through circuit successively.
2. industrial alternating current according to claim 1 detects table, it is characterized in that: also comprise host computer (7), host computer (7) is connected through circuit and microprocessor (4).
3. industrial alternating current according to claim 2 detects table, and it is characterized in that: said host computer (7) is computing machine or PLC.
4. industrial alternating current according to claim 1 detects table, it is characterized in that: also comprise warning device (9), warning device (9) is connected through circuit and microprocessor (4).
5. industrial alternating current according to claim 2 detects table; It is characterized in that: be equipped with wireless transport module (8) on said microprocessor (4), the host computer (7), microprocessor (4), host computer (7) carry out data transmission through wireless transport module (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102634479A CN102749500A (en) | 2012-07-27 | 2012-07-27 | Industrial alternating-current (AC) ampere meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102634479A CN102749500A (en) | 2012-07-27 | 2012-07-27 | Industrial alternating-current (AC) ampere meter |
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| Publication Number | Publication Date |
|---|---|
| CN102749500A true CN102749500A (en) | 2012-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012102634479A Pending CN102749500A (en) | 2012-07-27 | 2012-07-27 | Industrial alternating-current (AC) ampere meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105588972A (en) * | 2016-01-26 | 2016-05-18 | 中国人民解放军第四军医大学 | Industrial heavy current detection system and method realizing temperature monitoring |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4970459A (en) * | 1988-12-02 | 1990-11-13 | General Electric Company | Electronic meter chopper stabilization |
| JP2003121479A (en) * | 2001-10-17 | 2003-04-23 | Mitsubishi Heavy Ind Ltd | Current detector and photovoltaic power generator |
| CN1547035A (en) * | 2003-12-12 | 2004-11-17 | 华中科技大学 | a current sensor |
| CN1580795A (en) * | 2004-05-17 | 2005-02-16 | 西安交通大学 | Capacitive power equipment medium loss on-line monitoring method and device |
| CN102401855A (en) * | 2011-11-22 | 2012-04-04 | 李云宏 | Electric digital instrument using Rogowski coil current transformer |
| CN202720261U (en) * | 2012-07-27 | 2013-02-06 | 成都生辉电子科技有限公司 | Industrial alternating current detection meter |
-
2012
- 2012-07-27 CN CN2012102634479A patent/CN102749500A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4970459A (en) * | 1988-12-02 | 1990-11-13 | General Electric Company | Electronic meter chopper stabilization |
| JP2003121479A (en) * | 2001-10-17 | 2003-04-23 | Mitsubishi Heavy Ind Ltd | Current detector and photovoltaic power generator |
| CN1547035A (en) * | 2003-12-12 | 2004-11-17 | 华中科技大学 | a current sensor |
| CN1580795A (en) * | 2004-05-17 | 2005-02-16 | 西安交通大学 | Capacitive power equipment medium loss on-line monitoring method and device |
| CN102401855A (en) * | 2011-11-22 | 2012-04-04 | 李云宏 | Electric digital instrument using Rogowski coil current transformer |
| CN202720261U (en) * | 2012-07-27 | 2013-02-06 | 成都生辉电子科技有限公司 | Industrial alternating current detection meter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105588972A (en) * | 2016-01-26 | 2016-05-18 | 中国人民解放军第四军医大学 | Industrial heavy current detection system and method realizing temperature monitoring |
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Application publication date: 20121024 |