CN202256453U - Combined meter used for measuring single-phase voltage and current - Google Patents
Combined meter used for measuring single-phase voltage and current Download PDFInfo
- Publication number
- CN202256453U CN202256453U CN2011203796359U CN201120379635U CN202256453U CN 202256453 U CN202256453 U CN 202256453U CN 2011203796359 U CN2011203796359 U CN 2011203796359U CN 201120379635 U CN201120379635 U CN 201120379635U CN 202256453 U CN202256453 U CN 202256453U
- Authority
- CN
- China
- Prior art keywords
- circuit
- voltage
- current
- microprocessor
- phase voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model discloses a combined meter used for measuring single-phase voltage and current, which includes a power source connected with circuits and consists of a signal collecting circuit, a data processing circuit, a microprocessor and a display circuit, wherein the signal collecting circuit is sequentially connected with the display circuit through the data processing circuit and the microprocessor. The functions of the circuits are achieved through software programming, the software part controls the nixie tube drive chip mainly through the single chip, the calculated and externally collected voltage and current values are read through a measuring chip and correctly displayed on the face plate after calculating and processing. The combined meter solves the problem that the single-phase voltage and current signals can only be simultaneously measured through two meters, adopts the nixie tube to display the voltage and the current signals, the current value of the voltage and the current can be read without the need of entering the menu, and the software is used for calibration, as a result, the production cost of the meter can be greatly reduced, the circuit design is simplified, the product performance is stable and reliable, and the combined meter is easy to produce and has wide application range.
Description
Technical field
The utility model relates to power measure meters, relates in particular to a kind of combination instrument that is used to measure single-phase voltage and electric current.
Background technology
The supply of electric power normally has an important effect to the production of society, work, and the reliability of the measure and control instrument on the power switchgear and measure precision has played important effect to the normal operation of power switchgear.Traditional single-phase current, voltage table are separately measured and are shown, exist the measurement parameter error big, unstable properties, problems such as the Master Cost height of product.
The utility model content
The utility model technical matters to be solved is the deficiency to prior art; A kind of combination instrument and measuring method thereof that is used to measure single-phase voltage and electric current is provided; Reach and to measure single-phase current and voltage simultaneously, voltage, current value are concentrated on the display screen show.
For solving the problems of the technologies described above; The utility model technical scheme is a kind of combination instrument that is used to measure single-phase voltage and electric current; Comprise the power supply that is connected with each circuit; Described combination instrument is made up of signal acquisition circuit, data processing circuit, microprocessor, display circuit, and described signal acquisition circuit is connected with display circuit through data processing circuit, microprocessor successively.
Described signal acquisition circuit is gathered input signal through current transformer or voltage transformer (VT); Through the dividing potential drop and the divert shunt resistor of series and parallel on the line; Computation chip carries out filtering to voltage signal and the current signal from the resistor up-sampling; The delta sigma modulator sends data to microprocessor to the analog quantity sampling processing through the SPI serial line interface.
The serial data that chip for driving in the described display circuit sends over microprocessor converts parallel signal output to, drives charactron display voltage and current value.
Described microprocessor is a single-chip microcomputer, and model is AT89C51.
A kind of combination instrument that is used to measure single-phase voltage and electric current; Because adopt above-mentioned structure, instrument can be measured single-phase voltage and electric current simultaneously, electric current and voltage is concentrated on the display screen show; And adopted high-performance microprocessor to combine the method for designing of electric energy computation chip; Implemented by Using Single-chip Processor technology and designing with modular mode can be selected electric current and voltage measurement parameter arbitrarily, and the user can be as required arbitrarily makes up the functional module of instrument.The realization of this application circuit has solved and can only use two instrument could measure single-phase voltage and current signal simultaneously in the past, and what this instrument adopted is charactron display voltage and current signal; Need not get into the currency that menu just can read voltage and current; Calibrate with software, reduced the production cost of instrument significantly, simplified circuit design; Properties of product are reliable and stable, produce easily.Applied widely.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation;
Fig. 1 is a kind of combination instrument circuit structure block diagram that is used to measure single-phase voltage and electric current of the utility model;
Fig. 2 is a signal acquisition circuit structural representation shown in Figure 1;
Fig. 3 is a microcontroller circuit structural representation shown in Figure 1;
In Fig. 1, Fig. 2, Fig. 3,1, signal acquisition circuit; 2, data processing circuit; 3, microprocessor; 4, display circuit; 5, computation chip.
Embodiment
As shown in Figure 1; A kind of combination instrument that is used to measure single-phase voltage and electric current; Comprise the power supply that is connected with each circuit; Described combination instrument is made up of signal acquisition circuit 1, data processing circuit 2, microprocessor 3,4 of display circuits, and described signal acquisition circuit 1 is connected with display circuit 4 through data processing circuit 2, microprocessor 3 successively.
Like Fig. 2, shown in Figure 3, gather input signal, the dividing potential drop of the suitable resistance of series and parallel and divert shunt resistor on the line through current transformer or voltage transformer (VT); 5 pairs of voltage signal and current signals from the resistor up-sampling of measured chip carry out filtering; The delta sigma modulator sends data to microprocessor 3 to the analog quantity sampling processing through the SPI serial line interface, and microprocessor 3 is a single-chip microcomputer; Model is AT89C51, adopts crystal oscillator 4.096MHz.
Single chip computer AT 89C51 pin XTAL1, the external 12M crystal oscillator of XTAL2 and 2 s' electric capacity constitutes parallel oscillatory circuit; The 8 bit serial data-switching that chip for driving 74HC595 in the display circuit sends over the P2.0-P2.6 delivery outlet of single chip computer AT 89C51 become the output of 8 bit parallel signals; External current-limiting resistance shows in order to drive charactron.Realize the circuit of each function through software programming; Software section mainly passes through the control of single chip computer AT 89C51 logarithmic code pipe driving chip 74HC595; From computation chip CS5463, read good collection outside voltage, current value, computing correctly is presented on the panel.
Combine accompanying drawing that the utility model has been carried out exemplary description above; Obviously the concrete realization of the utility model does not receive the restriction of aforesaid way; As long as adopted method design of the utility model and the various improvement that technical scheme is carried out; Or directly apply to other occasion without improvement, all within the protection domain of the utility model.
Claims (4)
1. a combination instrument that is used to measure single-phase voltage and electric current comprises the power supply that is connected with each circuit, it is characterized in that; Described combination instrument is made up of signal acquisition circuit (1), data processing circuit (2), microprocessor (3), display circuit (4), and described signal acquisition circuit (1) is connected with display circuit (4) through data processing circuit (2), microprocessor (3) successively.
2. the combination instrument that is used to measure single-phase voltage and electric current according to claim 1 is characterized in that; Described signal acquisition circuit is gathered input signal through current transformer or voltage transformer (VT); Through the dividing potential drop and the divert shunt resistor of series and parallel on the line; Computation chip (5) carries out filtering to voltage signal and the current signal from the resistor up-sampling; The delta sigma modulator sends data to microprocessor (3) to the analog quantity sampling processing through the SPI serial line interface.
3. the combination instrument that is used to measure single-phase voltage and electric current according to claim 1 is characterized in that; The serial data that chip for driving in the described display circuit (4) sends over microprocessor (3) converts parallel signal output to, drives charactron display voltage and current value.
4. according to claim 1 or the 2 or 3 described combination instruments that are used to measure single-phase voltage and electric current, it is characterized in that; Described microprocessor (3) is a single-chip microcomputer, and model is AT89C51.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203796359U CN202256453U (en) | 2011-09-29 | 2011-09-29 | Combined meter used for measuring single-phase voltage and current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203796359U CN202256453U (en) | 2011-09-29 | 2011-09-29 | Combined meter used for measuring single-phase voltage and current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202256453U true CN202256453U (en) | 2012-05-30 |
Family
ID=46117672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203796359U Expired - Fee Related CN202256453U (en) | 2011-09-29 | 2011-09-29 | Combined meter used for measuring single-phase voltage and current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202256453U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353828A (en) * | 2011-09-29 | 2012-02-15 | 安徽鑫龙电器股份有限公司 | Combination instrument for measuring single-phase voltage and single-phase current as well as measuring method thereof |
| CN103487623A (en) * | 2012-06-11 | 2014-01-01 | 特克特朗尼克公司 | Serial data link measurement and simulation system |
-
2011
- 2011-09-29 CN CN2011203796359U patent/CN202256453U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353828A (en) * | 2011-09-29 | 2012-02-15 | 安徽鑫龙电器股份有限公司 | Combination instrument for measuring single-phase voltage and single-phase current as well as measuring method thereof |
| CN103487623A (en) * | 2012-06-11 | 2014-01-01 | 特克特朗尼克公司 | Serial data link measurement and simulation system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202093092U (en) | All-round power metering chip | |
| CN103852637B (en) | Intelligent electric meter with fundamental wave metering function and measurement method thereof | |
| CN201489356U (en) | Servo driver of alternating current asynchronous motor | |
| CN2261029Y (en) | Comprehensive calibrator for electric measuring device | |
| CN201909811U (en) | Three-phase watt-hour meter based on MSP430 singlechip | |
| CN102353828A (en) | Combination instrument for measuring single-phase voltage and single-phase current as well as measuring method thereof | |
| CN202256453U (en) | Combined meter used for measuring single-phase voltage and current | |
| CN206863116U (en) | Direct current multifunctional electric energy meter | |
| CN110514912A (en) | A kind of secondary voltage kernel phase system | |
| CN205643688U (en) | Single -phase electric energy meter detection device | |
| CN101285890A (en) | Wireless connection multichannel pulse scope-analyzer | |
| CN102628882A (en) | Multifunctional meter with voice broadcasting and digital/analog dual displaying functions | |
| CN203433041U (en) | An electric energy meter provided with a communication function | |
| CN106531269A (en) | Modular digital nuclear measuring apparatus | |
| CN102721565B (en) | Braking performance comprehensive testing device of brake and testing method thereof | |
| CN206363452U (en) | A kind of separating type radio-frequency intellectual water meter | |
| CN2687684Y (en) | Digital capacitive-inductance measuring instrument | |
| CN202058089U (en) | Digital power supply and external displaying device connected with same | |
| CN206440783U (en) | A kind of speed adjusting module test device of many gears of low-voltage | |
| CN205139911U (en) | Timer conter based on PXI bus | |
| CN103580654A (en) | Reactor period signal generator, implementation method thereof and use method thereof | |
| CN203909178U (en) | Multifunctional digital electric power meter | |
| CN204347146U (en) | Capacitance meter | |
| CN203117413U (en) | Verification device for single-phase voltage detector | |
| CN106020070B (en) | A kind of novel analog signal amplifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20140929 |
|
| EXPY | Termination of patent right or utility model |