CN2364467Y - High-accuracy digital power and KWH meter - Google Patents
High-accuracy digital power and KWH meter Download PDFInfo
- Publication number
- CN2364467Y CN2364467Y CN 99219680 CN99219680U CN2364467Y CN 2364467 Y CN2364467 Y CN 2364467Y CN 99219680 CN99219680 CN 99219680 CN 99219680 U CN99219680 U CN 99219680U CN 2364467 Y CN2364467 Y CN 2364467Y
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Abstract
The utility model relates to a high-accuracy digital power and KWH meter, which is composed of an outer shell, a handle, an indicating lamp, a power display screen, a counter for electrical degree, transparent sheets, an alternating current-direct current selective switch, a double-range selective switch, a power supply switch, a positive and a negative electrode terminals for voltage input, a positive and a negative electrode terminals for current input, circuit boards, a back cover, etc. The utility model is mainly characterized in that the upper circuit board in a shell body is provided with an analogue multiplier; the lower circuit board is provided with a frequency-pressing converter. The high-accuracy digital power and KWH meter can use the alternating current and the direct current, and can carry out synchronous measurement to the power and the electrical degree. The utility model has the advantages of high precision, good safety performance and double-range selection.
Description
The utility model belongs to a kind of power electric degree synchronous measuring instrument.
Power, watt-hour meter before this instrument, it is power, electric degree independent measurement separately, can not be by a kind of instrument synchro measure, and measuring accuracy is low, most under 1.0 grades (common engineering be 2.0 grades) degree of precision power measurement be the digital power meter that constitutes by modern P/v converter.It is also higher that the electronics of electric degree is measured precision, but cost is all higher.And measure only for interchange, a kind of instrument measurement of DC power, electric degree is not also found.Scientific research, teaching, instrument check etc., electric industry department a kind of precision height that just waits in expectation, convenient and practical electrical instrument can power, the electric degree synchro measure, and AC and DC is general.
Task of the present utility model is: a kind of novel high accuracy number power, watt-hour meter are provided, and AC/DC universal, reach the measurement synchronization that on an instrument, collects power, electric degree and carry out.
The method that the utility model task solves is: high accuracy number power watt-hour meter is imported positive and negative extreme knob, electric current input both positive and negative polarity terminal, wiring board, bonnet etc. by shell, portable handle, pilot lamp, power display screen, electric degree counter, slide, alternating current-direct current selector switch, double-range selector switch, power switch, voltage and is formed.
The principle of work of this instrument is: after (exchange and be example) turns on the electricity, by electric resistance partial pressure, obtain voltage signal.Shunt resistance obtains current signal.By voltage AC/DC (AC and DC converter,linear), electric current AC/DC (alternating current-direct current converter,linear) sends voltage, current signal into analog multiplier respectively through selector switch respectively.Because of P=VI (power equals the product of voltage and electric current).The analog multiplier output signal is a power signal, and this signal earlier by voltage divider, is selected to be divided into two parts behind the range (take advantage of one or take advantage of ten), and a part, a part are sent into digital base table, and driving display (LCD) shows the instantaneous value of power.Another part signal send voltage-to-frequency converter (UFC) to drive stepping motor through phase shift after homophase amplifies, and degree of making value adds up in counter, DC power, and the electric degree measuring circuit is basic identical, and just input signal is by the AC/DC converter.
Device adopts the layer cloth part in the meter housing, and upper and lower two-layer wiring board adopts traditional mechanical formula counter can preserve data after outage to make full use of the space.Shell upper casing and bottom end cover are an ABS plastic compacting and form.Connect the line by the off-balancesheet wiring diagram earlier during installation, obtain voltage signal by voltage divider, shunt obtains current signal respectively by voltage AC and DC converter,linear, through the alternating current-direct current selector switch.With voltage signal, send into " X " end respectively, current signal is sent into " Y " end.By analog multiplier " O " end output power signal.With 9: 1 dividing potential drop of this power signal, select range to take advantage of 1 or take advantage of 10.This signal is divided into two parts, and a part is sent into digital base table, display digit performance number on display screen.Another part by voltage-to-frequency converter, carries out the voltage to frequency conversion after in-phase voltage amplifies, behind phase shift network, drive stepping motor, makes counter accumulative total electric degree.On counter, show.
Stabilized voltage supply is the supply of complete machine each several part power supply.
Wiring board is arranged: voltage AC/DC, electric current AC/DC, analog multiplier are installed on the top wiring board, stabilized voltage supply, in-phase voltage amplification, voltage-to-frequency converter, phase shift network, be installed on the lower line plate, link with electric wire between two plates.
LCDs is installed on display window, and counter is installed on the number window position, fixes screw.The transformer element plate is installed in the shell, notes light emitting diode in the element board, and each switch and shell align (guaranteeing during design) and insert power supply and external connection, adjust by basic parameter.Mix up the fastening good bonnet screw in back, the main frame assembling is finished.
This instrument one is the problem that has solved power, electric degree synchro measure, the 2nd, and AC and DC is measured with machine.The 3rd, precision height (0.1 grade of power, 0.2 grade of electric degree).The 4th, double-range is selected.The 5th, the external influence circuit of input circuit atomic little (voltage 10M, electric current 0.02 Ω).The 6th, Overall Power Consumption is low.The characteristics of this instrument are: 1, measuring accuracy height.2, power, electric degree are synchronous, measure with table.3, AC and DC is general.4, instrument is minimum to the metering circuit influence.5, the direct current electric degree is measured intuitive display.6, full-electronic design, long service life.7, antijamming capability is strong.8, AC and DC easy-to-connect.9, security performance is good.10, double-range is selected.
Accompanying drawing is an embodiment of the present utility model.
Accompanying drawing 1 is the front view of high accuracy number power, watt-hour meter.
Accompanying drawing 2 is the right view of high accuracy number power, watt-hour meter
Accompanying drawing 3 is the rear view of high accuracy number power, watt-hour meter
Accompanying drawing 4 is the vertical view of high accuracy number power, watt-hour meter
Accompanying drawing 5 is the wiring diagram of high accuracy number power, watt-hour meter
Accompanying drawing 6 is the circuit block diagram of high accuracy number power, watt-hour meter
Accompanying drawing 7 is the external line chart of high accuracy number power, watt-hour meter
As shown in Figure 1, 2, 3: 1 voltage input "+" end knob, 2 voltages inputs "-" hold knob, 3 electric currents inputs "+" end knob, 4 electric currents inputs "-" end knob, 5 pilot lamp, 6 to fix portable screw, 7 fixed screws, 8 slidies, 9 portable handles, 10 power display screens, 11 electric degree counters, 12 alternating current-direct current selector switch, 13 double-range selector switch, 14 power switches, 15 shells, 16 wiring boards, 17 wiring boards, 18 bonnets, 19 fixed screws.
Embodiment: at first perform plastic casing 15 with mould, bonnet 16, on the shell outer panels, install slide 8 again with fixed screw 7, power display screen 10, electric degree counter 11, voltage input "+" end knob 1 by good pilot lamp 5 and shell below, voltage input "-" end knob 2, electric current input "+" end knob 3, electric current input "-" end knob 4, totally four end knobs, install alternating current-direct current selector switch 12 on the right side of shell, double-range selector switch 13, power switch 14, two ends, shell top with fix portable screw 6 is installed portable 9, adorn two layers of wiring board 16 in the housing, 17, bonnet 18 usefulness screws 19 install.Press good circuit by external line chart earlier during installation, obtain voltage signal by voltage divider, shunt obtains current signal, then by voltage AC and DC converter,linear, through the alternating current-direct current selector switch, respectively voltage signal is sent into " X " end, current signal is sent into " Y " end.By analog multiplier " O " end output power signal, this power signal is carried out 9: 1 dividing potential drop, select range to take advantage of 1 or take advantage of 10, this signal is divided into two parts, a part is sent into digital base table, display digit performance number on display screen.Another part carries out the voltage to frequency conversion by voltage-to-frequency converter after in-phase voltage amplifies, through phase shift network rear drive stepping motor, make counter accumulative total electric degree, shows on counter.
Voltage AC/DC (alternating current-direct current converter,linear), electric current AC/DC (alternating current-direct current converter,linear), stabilized voltage supply, analog multiplier is installed on the top wiring board, in-phase voltage amplification, voltage-to-frequency converter, phase shift network are installed on the lower line plate, connect with electric wire between two wiring boards.
This high accuracy number power, watt-hour meter collection power, electric degree measurement synchronization receive praises from customers.
Claims (2)
1, high accuracy number power watt-hour meter, import positive and negative extreme knob, electric current input positive and negative electrode terminal, wiring board, bonnet etc. by shell, portable handle, pilot lamp, power display screen, electric degree counter, slide, alternating current-direct current selector switch, double-range selector switch, power switch, voltage and form, it is characterized in that on the wiring board analog multiplier being housed in the shell.
2, high accuracy number power watt-hour meter according to claim 1 is equipped with a voltage-to-frequency converter on the wiring board in it is characterized in that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99219680 CN2364467Y (en) | 1999-01-25 | 1999-01-25 | High-accuracy digital power and KWH meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99219680 CN2364467Y (en) | 1999-01-25 | 1999-01-25 | High-accuracy digital power and KWH meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2364467Y true CN2364467Y (en) | 2000-02-16 |
Family
ID=34010557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99219680 Expired - Fee Related CN2364467Y (en) | 1999-01-25 | 1999-01-25 | High-accuracy digital power and KWH meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2364467Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288800A (en) * | 2010-06-17 | 2011-12-21 | 錞镱科技股份有限公司 | Clamp meter capable of simultaneously measuring voltage and current and method thereof |
| CN104502654A (en) * | 2014-12-30 | 2015-04-08 | 江苏斯菲尔电气股份有限公司 | High-protection level electric meter |
| CN109490594A (en) * | 2018-11-05 | 2019-03-19 | 河南朗博校准检测有限公司 | A kind of DC power supply power meter |
| CN110907698A (en) * | 2019-11-22 | 2020-03-24 | 国网浙江省电力有限公司电力科学研究院 | Electric energy metering device for direct current distribution network |
-
1999
- 1999-01-25 CN CN 99219680 patent/CN2364467Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288800A (en) * | 2010-06-17 | 2011-12-21 | 錞镱科技股份有限公司 | Clamp meter capable of simultaneously measuring voltage and current and method thereof |
| CN102288800B (en) * | 2010-06-17 | 2013-11-13 | 錞镱科技股份有限公司 | Clamp meter capable of simultaneously measuring voltage and current and method thereof |
| CN104502654A (en) * | 2014-12-30 | 2015-04-08 | 江苏斯菲尔电气股份有限公司 | High-protection level electric meter |
| CN109490594A (en) * | 2018-11-05 | 2019-03-19 | 河南朗博校准检测有限公司 | A kind of DC power supply power meter |
| CN110907698A (en) * | 2019-11-22 | 2020-03-24 | 国网浙江省电力有限公司电力科学研究院 | Electric energy metering device for direct current distribution network |
| CN110907698B (en) * | 2019-11-22 | 2021-11-09 | 国网浙江省电力有限公司营销服务中心 | Electric energy metering device for direct current distribution network |
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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 |