CN204028224U - A kind of direct current energy measurement instrument - Google Patents
A kind of direct current energy measurement instrument Download PDFInfo
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- CN204028224U CN204028224U CN201420423886.6U CN201420423886U CN204028224U CN 204028224 U CN204028224 U CN 204028224U CN 201420423886 U CN201420423886 U CN 201420423886U CN 204028224 U CN204028224 U CN 204028224U
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- energy measurement
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Abstract
The utility model discloses a kind of direct current energy measurement instrument, comprise MCU module, display module, key-press module, signal sampling module, power module, input and output module, communication module, pulse output module, it is characterized in that, the signal of conversion is given MCU module by signal sampling module, after MCU module carries out A/D conversion to signal, carry out pulse output via pulse output module, carry out real-time remote transmission by communication module, and carry out the real-time display of data by display module.The utility model realizes the direct measurement of all parameters of direct current power supply loop, comprises voltage, electric current, power, forward electric energy, reverse power; Carry out power or energy calculate without the need to user by mode that is artificial or host computer, the precision of parameter measurement is high, real-time.Overall cost is low, dependable performance.
Description
Technical field
The utility model relates to intelligent electric instrument field, especially for the direct current energy measurement instrument of DC loop.
Background technology
Current intelligent electric power instrument is more and more extensive in the application of industry spot, industry spot DC generation and direct-flow electricity utilization apparatus increasingly universal, especially with photovoltaic industry in recent years develop rapidly and the advantage of DC operation and direct-flow electricity utilization apparatus becomes increasingly conspicuous, industrial occasions is badly in need of a kind of instrument can carrying out measuring for DC loop parameter assessment.And the direct current measurement instrument of industry spot more only independently can be measured for voltage or electric current at present, directly the practical power of DC equipment cannot be measured in real time, more cannot add up direct current power consumption.This is the difficult problem that the monitoring of industry spot DC loop is added up with direct current energy always.
Utility model content
Utility model object: the utility model proposes a kind of direct current energy measurement instrument, directly can be carried out the measurement of electric current and voltage, and be processed by inner MCU module to DC network, calculate realtime power and electric energy and add up.
Technical scheme: a kind of direct current energy measurement instrument, comprise MCU module, display module, key-press module, signal sampling module, power module, input and output module, communication module, pulse output module, it is characterized in that, the signal of conversion is given MCU module by signal sampling module, after MCU module carries out A/D conversion to signal, carry out pulse output via pulse output module, carry out real-time remote transmission by communication module, and carry out the real-time display of data by display module.
Described MCU module adopts MSP430 microprocessor.
Described display module adopts a section-type LCD display mode.
Described key-press module adopts the function of existing four buttons of two I/O causes for gossip.
Described signal sampling module adopts operational amplifier mode to carry out the dividing potential drop sampling of voltage signal and the amplification sampling of current signal.
The Switching Power Supply that described power module adopts TNY286P control chip to build.
Described input and output module comprises four road dry contact intake input and the passive outputs of two-way relay.
Described communication module is RS485 communication module, employing be Modbus-RTU agreement.
Described pulse output module adopts light-coupled isolation to export.
Beneficial effect: compared with prior art, the utility model realizes the direct measurement of all parameters of direct current power supply loop, comprises voltage, electric current, power, forward electric energy, reverse power; Carry out power or energy calculate without the need to user by mode that is artificial or host computer, the precision of parameter measurement is high, real-time.Overall cost is low, dependable performance.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present utility model;
Fig. 2 is circuit diagram of the present utility model.
Embodiment
As shown in Figure 1, 2, a kind of direct current energy measurement instrument described in the utility model, comprise MCU module 1, display module 2, key-press module 3, signal sampling module 4, power module 5, input and output module 6, communication module 7, pulse output module 8, the wherein Switching Power Supply that inputs for wide region of power module 5, the work for whole instrument provides stable working power; Signal sampling module 4 converts the voltage/current signals of DC loop to A/D unit that the acceptable small d. c. voltage signal of single-chip microcomputer gives MCU module 1 by by operational amplifier inverting amplifier mode; MCU module 1 pair of input signal carries out A/D conversion and is quantized into digital pulse signal, give pulse output module 8 to carry out pulse output and by communication module 7, the data after conversion are carried out real-time long-distance transmissions, and carry out the real-time display of local data by display module 2; Key-press module 3 is supplied to the setting that user carries out parameter, as voltage/current no-load voltage ratio, the DC loop parameters such as meter constant, and be supplied to user data and check man-machine operation interface, guarantee the consistance of gauge internal parameter and DC loop nominal parameters, ensure the correctness measuring display.
MCU module 1 uses the microcontroller chip of TI company, and chip provides A/D to sample and liquid crystal drive function, and measured signal is introduced into chip and carries out the control that data processing and chip carry out other and export.Display module 2 uses a section-type LCD data after MCU process to be shown in real time, and can provide to user and can grasp aobvious interface intuitively.Key-press module 3 provides user to arrange instrument parameter, or carries out checking of measurement data by button.Signal sampling module 4, by the voltage and current signal of DC loop, is transformed into the d. c. voltage signal of 0-0.5V by operational amplifier, be supplied to the A/D changing voltage of MCU module stability and safety.Power module 5 provides stable working power for each functional module work, adopts AC/DC wide range input scheme, selects the TNY286P Switching Power Supply control chip of PI Corp. to build.Open function in input and output module 6 and can detect on-off model beyond this instrument, coordinate the control of other equipment of industry spot; Output function and can realize electrical measurement off-limit alarm or the communication remote control amount of outputing carries out outputs control, intake functional realiey coordinated signals can be coordinated equally.Communication module 7 can realize the long-distance transmissions of all measurement data, coordinates user's upper computer software to carry out networking control.The electrical energy pulse isolation and amplifier that MCU module 1 exports by pulse output module 8.
Claims (9)
1. a direct current energy measurement instrument, comprise MCU module (1), display module (2), key-press module (3), signal sampling module (4), power module (5), input and output module (6), communication module (7), pulse output module (8), it is characterized in that, the signal of conversion is given MCU module (1) by signal sampling module (4), after MCU module (1) carries out A/D conversion to signal, pulse output is carried out via pulse output module (8), real-time remote transmission is carried out by communication module (7), and the real-time display of data is carried out by display module (2).
2. direct current energy measurement instrument according to claim 1, is characterized in that, described MCU module (1) adopts MSP430 microprocessor.
3. direct current energy measurement instrument according to claim 1, is characterized in that, described display module (2) adopts a section-type LCD display mode.
4. direct current energy measurement instrument according to claim 1, is characterized in that, described key-press module (3) adopts the function of existing four buttons of two I/O causes for gossip.
5. direct current energy measurement instrument according to claim 1, is characterized in that, described signal sampling module (4) adopts operational amplifier mode to carry out the dividing potential drop sampling of voltage signal and the amplification sampling of current signal.
6. direct current energy measurement instrument according to claim 1, is characterized in that, the Switching Power Supply that described power module (5) adopts TNY286P control chip to build.
7. direct current energy measurement instrument according to claim 1, is characterized in that, described input and output module (6) comprises four road dry contact intake input and the passive outputs of two-way relay.
8. direct current energy measurement instrument according to claim 1, is characterized in that, described communication module (7) is RS485 communication module, employing be Modbus-RTU agreement.
9. direct current energy measurement instrument according to claim 1, is characterized in that, described pulse output module (8) adopts light-coupled isolation to export.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420423886.6U CN204028224U (en) | 2014-07-29 | 2014-07-29 | A kind of direct current energy measurement instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420423886.6U CN204028224U (en) | 2014-07-29 | 2014-07-29 | A kind of direct current energy measurement instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204028224U true CN204028224U (en) | 2014-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420423886.6U Active CN204028224U (en) | 2014-07-29 | 2014-07-29 | A kind of direct current energy measurement instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204028224U (en) |
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2014
- 2014-07-29 CN CN201420423886.6U patent/CN204028224U/en active Active
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