CN2483731Y - Portable digital double phase clamping volt-amperameter - Google Patents
Portable digital double phase clamping volt-amperameter Download PDFInfo
- Publication number
- CN2483731Y CN2483731Y CN 00226776 CN00226776U CN2483731Y CN 2483731 Y CN2483731 Y CN 2483731Y CN 00226776 CN00226776 CN 00226776 CN 00226776 U CN00226776 U CN 00226776U CN 2483731 Y CN2483731 Y CN 2483731Y
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- CN
- China
- Prior art keywords
- phase
- hand
- measurement instrument
- meter
- voltage
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- Expired - Fee Related
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Abstract
The utility model relates to a hand-held digital double clamp phase VA meter, consisting of a clamp shaped current transformer and a measuring instrument. The measuring instrument uses micro power consumption and high precision transporting discharge comparison to measure the amplification and comparison of the signal and complete the phase measuring. The measuring instrument uses the micro power consumption transporting discharge to realize the AC/DC conversion, and uses the super-scale IC to realize the A/D transform and display. A rotary switch which is arranged on the circuit board completes the conversion of function and range. The utility model can realize the measurement of the voltage, the current and the phase in the condition of line disconnecting for using the hand-held structure, and can also detect the working voltage of the battery.
Description
The utility model belongs to a kind of hand-held electric instrument---hand-held pincers type phase place, voltage, reometer.
In recent years, during the on-the-spot detection of China's power department electric current and voltage phase place, use the patented product of Greatwall Electric Instrument Co., Ltd., Jingyang, Shaanxi's research and development in 1996 mostly, the patent No.: 962364738, SMG-2B type numeral Phase VA Meter with Two Current Sensor and other like product.These products have many good qualities than the pointer instrument that uses for many years, but also have following problem:
1. volume is big, carries inconvenience;
2. the use battery is many, reaches 4-5 joint Voltaic battery, no battery voltage detection function.Owing to can not detect cell voltage, when cell voltage is not enough, can influence measuring accuracy;
3. voltage resolution is low: general voltage resolution is 1V.
The purpose of this utility model is to address the above problem, and designs the portable again handheld digital Phase VA Meter with Two Current Sensor of excellent performance, satisfies the power department needs.
Technical solution of the present utility model is:
1. the handheld digital Phase VA Meter with Two Current Sensor is made up of split core type current transformer and measurement instrument two parts.
2. its measurement instrument partly adopts low-power consumption, high-accuracy amplifier to the measured signal amplification ratio, detect the zero passage moment of I road signal and II road signal respectively, after light-coupled isolation, send S, the R end of rest-set flip-flop, the pulse width of its output terminal Q is directly proportional with phase place, when its amplitude stability, filtered DC component is phase value.Realize the AC/DC conversion with the low-power consumption amplifier.Adopt VLSI (very large scale integrated circuit) to realize the A/D conversion, LCD shows;
3. adopt general handheld digital multimeter shell, the direct design and installation of rotary switch realizes function and the conversion of amount limit in the circuit board, and it is corresponding with the amount limit automatically that radix point and dimension are shown;
4. its function and amount limit set gradually and are BAT
2, BAT
1, I
1(200mA, 2A, 10A), U
1(200V, 500V), φ, φ school, U
2(200V, 200V), I
2(10A, 2A, 200mA);
5. with two joint 9V powered battery, adopt advanced power converting circuit, realize that with amplifier low power consumption voltage distributes with stable;
6. the employing photoelectrical coupler is realized the two-way isolation;
7. during battery voltage detection, two batteries are working power each other;
8. the instrument fundamental quantity is limited to 2V, to guarantee to have stronger anti-interference and reading stability.
By adopting state-of-the-art device and meticulous circuit and switch designs, solved following problem:
1. use handheld structure, under the situation of open-circuit line not, realized the electric current and voltage phase measurement.Volume 165mm * 85mm * 35mm.
2. only save the 9V powered battery, and have the battery voltage detection function with 2;
3. the phase mass limit is 360 °, 1 ° of resolution, and 1.0 grades of precision can be surveyed U-U, U-I, the phase place between the I-I is surveyed phase voltage 3V-500V, surveys phase current 10mA-10A, is surveying phase time without open-circuit line and replacing amount limit, and two-way is isolated;
4. voltage is limit 500V, 200V, resolution 0.1V, 1.0 grades of precision;
5. the magnitude of current is limit 10A, 2A, 200mA, resolution 0.1mA, 2.0 grades of precision;
6. reasonably function and the design of amount limit, rotating switch during use can be read tested voltage, size of current and phase place thereof.
Accompanying drawing has been described a preferred embodiment of the present utility model.
Fig. 1 is the principle of work block scheme of this embodiment.
Fig. 2 is that panel-switch function and the amount limit of this embodiment is provided with figure.
Referring to Fig. 1, E
1: when Measurement Phase φ the amplifier comparator power supply of I road; When measuring voltage, electric current (U, I) is that AC/DC powers as malleation, and produces an efficient negative pressure, and AC/DC is worked in ± 9V, and guaranteeing has good linearty in the 2V.E
2: being A/D and LCD display power supply, is the power supply of phase-detecting circuit and II road amplifier comparator when Measurement Phase φ.E1, E2 working power each other when battery detecting.Referring to Fig. 2, panel-switch function and amount limit design successively have BAT
1, BAT
2, I
1(200mA, 2A, 10A), U
1(200V, 500V), φ, 360 ° of schools, U
2(500V, 200V), I
2(10A, 2A, 200mA) can carry out voltage, electric current and phase measurement and battery operated voltage detecting (BAT easily
1.BAT
2).
In conjunction with above embodiment as can be seen, advantage of the present utility model is: adopt handheld structure, under the situation of open-circuit line not, realized the measurement of electric current and voltage and phase place thereof, reduced the instrument volume greatly; Rotating switch can be read tested voltage, size of current and phase place thereof when rotating switch can be read tested voltage, use during use.Only save the 9V powered battery, and have the battery voltage detection function with 2; The instrument fundamental quantity is limited to 2V, and stronger anti-interference and reading stability are arranged.Survey phase voltage 3V-500V, survey phase current 10mA-10A; Voltage resolution 0.1V, electric current resolution 0.1mA.
Claims (4)
1. handheld digital Phase VA Meter with Two Current Sensor, comprise clamp current transformer and hand-held measurement instrument, it is characterized in that: the output terminal of described clamp current transformer connects the hand-held measurement instrument, contain electric current, voltage, phase measurement circuit in the hand-held measurement instrument, the A/D transducer is by LCD liquid crystal display measurement result.
2. handheld digital Phase VA Meter with Two Current Sensor according to claim 1 is characterized in that: the direct design and installation of the rotary switch of described hand-held measurement instrument in the circuit board.
3. handheld digital Phase VA Meter with Two Current Sensor according to claim 1 and 2 is characterized in that: the function of described hand-held measurement instrument and range set gradually and are BAT
2, BAT
1, I
1(200mA, 2A, 10A), U
1(200V, 500V), Φ, 360 ° of schools, U
2(500V, 200V), I
2(10A, 2A, 200mA).
4. handheld digital Phase VA Meter with Two Current Sensor according to claim 1 is characterized in that: described hand-held measurement instrument adopts 2 joint 9V layer-built battery power supplies, adopts the efficient power translation circuit, realizes that with amplifier low power consumption voltage distributes with stable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00226776 CN2483731Y (en) | 2000-09-07 | 2000-09-07 | Portable digital double phase clamping volt-amperameter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00226776 CN2483731Y (en) | 2000-09-07 | 2000-09-07 | Portable digital double phase clamping volt-amperameter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2483731Y true CN2483731Y (en) | 2002-03-27 |
Family
ID=33590541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00226776 Expired - Fee Related CN2483731Y (en) | 2000-09-07 | 2000-09-07 | Portable digital double phase clamping volt-amperameter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2483731Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012097648A1 (en) * | 2011-01-20 | 2012-07-26 | 安徽省电力公司蚌埠供电公司 | Multifunctional wiring detector for electric energy metering device |
| CN103063895A (en) * | 2013-01-10 | 2013-04-24 | 华北电力科学研究院有限责任公司 | Pliers-shaped anti-interference current transformer and transformer iron core grounding current testing system |
-
2000
- 2000-09-07 CN CN 00226776 patent/CN2483731Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012097648A1 (en) * | 2011-01-20 | 2012-07-26 | 安徽省电力公司蚌埠供电公司 | Multifunctional wiring detector for electric energy metering device |
| CN103063895A (en) * | 2013-01-10 | 2013-04-24 | 华北电力科学研究院有限责任公司 | Pliers-shaped anti-interference current transformer and transformer iron core grounding current testing system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |