CN102759651A - Industrial voltage measurement structure - Google Patents
Industrial voltage measurement structure Download PDFInfo
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- CN102759651A CN102759651A CN2012102634515A CN201210263451A CN102759651A CN 102759651 A CN102759651 A CN 102759651A CN 2012102634515 A CN2012102634515 A CN 2012102634515A CN 201210263451 A CN201210263451 A CN 201210263451A CN 102759651 A CN102759651 A CN 102759651A
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Abstract
The invention discloses an industrial voltage measurement structure. The structure comprises two voltage connection terminals to be measured, a 200 kilo-ohm precision metal film resistor, a voltage transformer, a sampling resistor, a signal amplifier, a microprocessor and a digital display tube, wherein one voltage connection terminals to be measured is communicated with an input end of the voltage transformer through a circuit, the other voltage connection terminals to be measured is communicated with the 200 kilo-ohm precision metal film resistor and another input end of the voltage transformer through a circuit in sequence; an output end of the voltage transformer is grounded through a circuit, and another output end of the voltage transformer is communicated with the signal amplifier, the microprocessor and the digital display tube through a circuit in sequence; and one end of the sampling resistor is grounded through a circuit, and the other end of the sampling resistor is communicated with the signal amplifier and the voltage transformer through a circuit. The industrial voltage measurement structure has the advantages of high measurement accuracy and precision level of reaching 0.1 level.
Description
Technical field
The invention belongs to the Power Electronic Technique detection range, specifically, relate to a kind of industrial voltage determination structure.
Background technology
Voltage table is a kind of instrument of measuring voltage; Common voltage table-voltage meter symbol: V; In the sensitive galvanometer the inside permanent magnet is arranged; Coil that is made up of lead of series connection between galvanometric two binding posts, coil is placed in the magnetic field of permanent magnet, and links to each other with the pointer of table through gearing.Most of voltage table all is divided into two ranges, and (0-3V) (0-15V), this voltage table only is applicable to the mensuration of small voltage and light current pressure.
Existing A.C. voltmeter mainly adopt rectifier type ammeter, electromagnetic system ammeter, electronic be that ammeter and static are the measuring mechanism of ammeter.Destaticing is outside the voltage table, and other are that voltage table all is to be in series with small range ammeter and voltage divider.The voltage divider that also available several resistance is formed is connected with measuring mechanism and is formed multivoltmeter.These A.C. voltmeters that are are difficult to process lower range, and minimum range lies prostrate between tens volts several, and maximum amount Cheng Ze is about 1～2 kilovolt.Static is that the minimum range of voltage table is about 30 volts, and that maximum amount Cheng Ze can reach is very high.The high-tension voltmeter that uses in the electric system is to be 100 volts electromagnetic system voltage table by the voltagerating range, forms in conjunction with the voltage transformer (VT) of appropriate voltage no-load voltage ratio.Owing to receive the restriction of measuring mechanism coil inductance, the electromagnetic system voltage table, electronic be that the frequency of utilization scope of voltage table is narrower, upper limiting frequency is lower than 1～2 kilo hertz.Electronic system slightly is superior to electromagnetic system.Static system and thermoelectricity are frequency of utilization scope broad all of voltage table.Several kilo hertzs approximately of the upper limit frequencies of utilization of rectifier type voltage table, but only be noted that when alternating voltage was sinusoidal waveform, rectifier type ammeter reading was only correct.
In the Chinese industrial electricity consumption, single-phase is 220V, and three-phase is 380V, and frequency is 50 hertz.It measured that precision is not high as a result when above-mentioned A.C. voltmeter was used for industrial voltage determination.
Summary of the invention
Technical matters to be solved by this invention provides a kind of higher industrial voltage determination structure of precision as a result of measuring.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: industrial voltage determination structure; Comprise two voltage terminal to be measured, 200K Europe precision metallic film resistance, voltage transformer (VT), sample resistance, signal amplifier, microprocessor, digital display tube; One of them voltage terminal to be measured is connected through an input end of circuit and voltage transformer (VT); Another voltage terminal to be measured is connected with another input end of 200K Europe precision metallic film resistance and voltage transformer (VT) through circuit successively; An output terminal of voltage transformer (VT) is through line-to-ground; Another output terminal of voltage transformer (VT) is connected with signal amplifier, microprocessor, digital display tube through circuit successively; Said sample resistance one end is through line-to-ground, and the other end is connected through the circuit between circuit and signal amplifier and the voltage transformer (VT).
Further, also comprise warning device, said warning device and microprocessor are connected through circuit.This warning device can be through importing alarm voltage on microprocessor, surpass the setting voltage upper limit or measure voltage when being lower than setting voltage when measuring voltage, 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.
Also comprise host computer, said host computer and microprocessor are connected through circuit.Can store and handle the magnitude of voltage that is measured to through host computer like this, and mensuration curve that can the formation voltage value, so that understand the variation of voltage in the equipment work process.Perhaps because the change in voltage that other reasons causes.
Said host computer is computing machine or PLC.
Said microprocessor and host computer are equipped with wireless transport module, and microprocessor and host computer carry out data transmission through wireless transport module.
Compared with prior art, the present invention has the following advantages and beneficial effect: industrial voltage determination structure determination precision of the present invention is higher, and accuracy class can reach 0.1 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: 1-200K Europe precision metallic film resistance; 2-voltage terminal to be measured; The 3-voltage transformer (VT); The 4-sample resistance; The 5-signal amplifier; The 6-microprocessor; The 7-host computer; The 8-wireless transport module; The 9-warning device; The digital display tube of 10-.
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; Present embodiment industry voltage determination structure comprises two voltage terminal to be measured 2,200K Europe precision metallic film resistance 1, voltage transformer (VT) 3, sample resistance 4, signal amplifier 5, microprocessor 6, host computer 7 (computing machine or PLC), warning device 9, digital display tube 10; One of them voltage terminal 2 to be measured is connected through an input end of circuit and voltage transformer (VT) 3; Another voltage terminal 2 to be measured is connected with another input end of 200K Europe precision metallic film resistance 1 and voltage transformer (VT) 3 through circuit successively; An output terminal of voltage transformer (VT) 3 is through line-to-ground; Another output terminal of voltage transformer (VT) 3 is connected with signal amplifier 5, microprocessor 6, digital display tube 10 through circuit successively; Said sample resistance 4 (sample resistance 4 is 250 an Europe precision metallic film resistances) end is through line-to-ground, and the other end is connected through the circuit between circuit and signal amplifier 5 and the voltage transformer (VT) 3; Warning device 9, host computer 7 (computing machine or PLC) are connected through circuit with microprocessor 6 respectively.
Embodiment 2:
As shown in Figure 1; Present embodiment industry voltage determination structure comprises two voltage terminal to be measured 2,200K Europe precision metallic film resistance 1, voltage transformer (VT) 3, sample resistance 4, signal amplifier 5, microprocessor 6, host computer 7 (computing machine or PLC), warning device 9, digital display tube 10; One of them voltage terminal 2 to be measured is connected through an input end of circuit and voltage transformer (VT) 3; Another voltage terminal 2 to be measured is connected with another input end of 200K Europe precision metallic film resistance 1 and voltage transformer (VT) 3 through circuit successively; An output terminal of voltage transformer (VT) 3 is through line-to-ground; Another output terminal of voltage transformer (VT) 3 is connected with signal amplifier 5, microprocessor 6, digital display tube 10 through circuit successively; Said sample resistance 4 one ends are through line-to-ground, and the other end is connected through the circuit between circuit and signal amplifier 5 and the voltage transformer (VT) 3; Warning device 9 is connected through circuit with microprocessor 6.Host computer 7 (computing machine or PLC) and microprocessor 6 are equipped with wireless transport module 8, and microprocessor 6 carries out data transmission with host computer 7 through wireless transport module 8.
Embodiment 3:
As shown in Figure 1; Present embodiment industry voltage determination structure comprises two voltage terminal to be measured 2,200K Europe precision metallic film resistance 1, voltage transformer (VT) 3, sample resistance 4, signal amplifier 5, microprocessor 6, host computer 7 (computing machine or PLC), warning device 9, digital display tube 10; One of them voltage terminal 2 to be measured is connected through an input end of circuit and voltage transformer (VT) 3; Another voltage terminal 2 to be measured is connected with another input end of 200K Europe precision metallic film resistance 1 and voltage transformer (VT) 3 through circuit successively; An output terminal of voltage transformer (VT) 3 is through line-to-ground; Another output terminal of voltage transformer (VT) 3 is connected with signal amplifier 5, microprocessor 6, digital display tube 10 through circuit successively; Said sample resistance 4 one ends are through line-to-ground, and the other end is connected through the circuit between circuit and signal amplifier 5 and the voltage transformer (VT) 3; Warning device 9 is connected through circuit with microprocessor 6.Host computer 7 (computing machine or PLC) and microprocessor 6 are equipped with wireless transport module 8, and microprocessor 6 carries out data transmission with host computer 7 through wireless transport module 8; And host computer 7 (computing machine or PLC) and microprocessor 6 are equipped with wireless transport module 8, and microprocessor 6 carries out data transmission with host computer 7 through wireless transport module 8.
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.Adopt the industrial voltage determination structure of embodiment 1-3 respectively the industrial electro of 220V to be compressed into the row detection.Measure the result and be respectively 219.86V, 220.03V, 220.52V, 220.35V, 220.19V for 5 times of embodiment 1; Measure the result and be respectively 219.73V, 219.68V, 219.92V, 220.12V, 219.39V for 5 times of embodiment 2; Measure the result and be respectively 220.16V, 220.08V, 220.32V, 220.15V, 220.16V for 5 times of embodiment 3; Its accuracy class can reach 0.1 grade.
Adopt the industrial voltage determination structure of embodiment 1-3 respectively the industrial electro of 380V to be compressed into the row detection.Measure the result and be respectively 381.06V, 381.31V, 380.89V, 380.35V, 379.90V for 5 times of embodiment 1; Measure the result and be respectively 381.41V, 381.20V, 380.76V, 380.94V, 380.39V for 5 times of embodiment 2; Measure the result and be respectively 380.48V, 380.63V, 379.82V, 381.06V, 380.37V for 5 times of embodiment 3.Its accuracy class can reach 0.1 grade.
The ammeter measurement has the certain precision grade, and 0.1 grade, 0.2 grade, 0.5 grade, 1 grade, 1.5 grades, 2.5 grades, 5 grades, totally 7 grades.0.1 class precision is the highest, 5 class precisions are minimum.For example 5 grades is exactly 5 volts of 100 volts of errors.
As stated, just can realize the present invention preferably.
Claims (5)
1. industrial voltage determination structure; It is characterized in that: comprise two voltage terminal (2), 200K Europe precision metallic film resistances (1) to be measured, voltage transformer (VT) (3), sample resistance (4), signal amplifier (5), microprocessor (6), digital display tube (10); One of them voltage terminal to be measured (2) is connected through an input end of circuit and voltage transformer (VT) (3); Another voltage terminal to be measured (2) is connected with another input end of 200K Europe precision metallic film resistance (1) and voltage transformer (VT) (3) through circuit successively; An output terminal of voltage transformer (VT) (3) is through line-to-ground; Another output terminal of voltage transformer (VT) (3) is connected with signal amplifier (5), microprocessor (6), digital display tube (10) through circuit successively; Said sample resistance (4) one ends are through line-to-ground, and the other end is connected through the circuit between circuit and signal amplifier (5) and the voltage transformer (VT) (3).
2. industrial voltage determination structure according to claim 1 is characterized in that: also comprise warning device (9), said warning device (9) is connected through circuit with microprocessor (6).
3. industrial voltage determination structure according to claim 1 and 2 is characterized in that: also comprise host computer (7), said host computer (7) is connected through circuit with microprocessor (6).
4. industrial voltage determination structure according to claim 3 is characterized in that: said host computer (7) is computing machine or PLC.
5. industrial voltage determination structure according to claim 3; It is characterized in that: said microprocessor (6) is equipped with wireless transport module (8) with host computer (7), and microprocessor (6) carries out data transmission with host computer (7) through wireless transport module (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102634515A CN102759651A (en) | 2012-07-27 | 2012-07-27 | Industrial voltage measurement structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102634515A CN102759651A (en) | 2012-07-27 | 2012-07-27 | Industrial voltage measurement structure |
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| CN102759651A true CN102759651A (en) | 2012-10-31 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2347755A (en) * | 1999-03-11 | 2000-09-13 | Mitsubishi Electric Corp | Protection system with smaller current detection transformer |
| CN200979866Y (en) * | 2006-12-06 | 2007-11-21 | 天津百利特精电气股份有限公司 | An intelligent release of a build-in voltage sensor |
| CN201740849U (en) * | 2010-08-03 | 2011-02-09 | 江西八达电子有限公司 | Safety protective appliance testing device |
| CN102611120A (en) * | 2012-03-27 | 2012-07-25 | 鲁东大学 | Power factor monitoring and compensating system |
| CN202720263U (en) * | 2012-07-27 | 2013-02-06 | 成都生辉电子科技有限公司 | Industrial voltage measurement structure |
-
2012
- 2012-07-27 CN CN2012102634515A patent/CN102759651A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2347755A (en) * | 1999-03-11 | 2000-09-13 | Mitsubishi Electric Corp | Protection system with smaller current detection transformer |
| CN200979866Y (en) * | 2006-12-06 | 2007-11-21 | 天津百利特精电气股份有限公司 | An intelligent release of a build-in voltage sensor |
| CN201740849U (en) * | 2010-08-03 | 2011-02-09 | 江西八达电子有限公司 | Safety protective appliance testing device |
| CN102611120A (en) * | 2012-03-27 | 2012-07-25 | 鲁东大学 | Power factor monitoring and compensating system |
| CN202720263U (en) * | 2012-07-27 | 2013-02-06 | 成都生辉电子科技有限公司 | Industrial voltage measurement structure |
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Application publication date: 20121031 |