CN203909178U - Multifunctional digital electric power meter - Google Patents
Multifunctional digital electric power meter Download PDFInfo
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- CN203909178U CN203909178U CN201420285493.3U CN201420285493U CN203909178U CN 203909178 U CN203909178 U CN 203909178U CN 201420285493 U CN201420285493 U CN 201420285493U CN 203909178 U CN203909178 U CN 203909178U
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Abstract
The utility model relates to the technical field of electric power meters, and in particular relates to a multifunctional digital electric power meter which comprises a SoC module circuit, a current signal acquisition circuit, a voltage signal acquisition circuit, an LCD display circuit, a data communication circuit, a measurement pulse output circuit and a power supply module. The multifunctional digital electric power meter provided by the utility model has the advantages of reliable performance, high data acquisition accuracy, complete functions and stable system, can replace a conventional electric power transmitter, a measuring and indicating meter, an electric energy measurement meter and related auxiliary units, and is suitable for wide popularization and application.
Description
(1) technical field
The utility model relates to electric instrument field, particularly a kind of multifunctional digital electric instrument.
(2) background technology
In electric instrument industry, the induction type pointer electric parameter measurement table falling behind because its function singleness and the shortcoming such as measuring accuracy is lower progressively eliminated by high-precision electronic insertion Multi-functional digital display electric instrument.The electronic type multifunction power table of comparative maturity has been widely used in various electric system in the market, along with the development of power industry and improving constantly of market demands, digital display electric instrument table is also towards high precision, intelligent, multi-functional future development, for electric system, industrial and mining enterprises, the power monitorings such as intelligent building, Based Intelligent Control, the application scenario of metering examination, high performance-price ratio, high precision, the multifunctional electric meter of high reliability replaces conventional electric power transmitter, measure indicating instrument, electric energy measurement instrument becomes inevitable, the demand of multifunctional electric meter also can be more and more higher, but the scheme of present multifunctional electric meter adopts external import computation chip mostly, high expensive, cause the price of multifunction instrument relatively higher, make troubles to the popularization on a large scale of multifunctional electric meter.
(3) summary of the invention
The utility model is in order to make up the deficiencies in the prior art, provides that a kind of measurement parameter precision is high, multiple functional, the multifunctional digital electric instrument of system stability, greatly reduces the cost of multifunctional electric meter, reduces the use financial cost of multifunction instrument.
The utility model is achieved by the following technical solution:
A kind of multifunctional digital electric instrument, comprise SoC module, current signal Acquisition Circuit, voltage signal acquisition circuit, LCD display circuit, datel circuit, metrical pulse output circuit and power module circuitry, it is characterized in that: described SoC module is connected and controls and data transmission with current signal Acquisition Circuit, voltage signal acquisition circuit, LCD display circuit, datel circuit, metrical pulse output circuit respectively by data bus, power module circuitry provides power supply energy for whole system.
Described SoC module adopts V9003 SoC chip.
Described current signal Acquisition Circuit is by current transformer, high precision load resistance, RC the electric circuit constitute, and current transformer, high precision load resistance, RC the electric circuit constitute are connected successively, and RC circuit is connected with SoC module.Current signal is changed high-precision difference voltage signal input SoC module by current signal Acquisition Circuit.
Described voltage signal acquisition circuit is made up of current mode voltage transformer (VT), current-limiting resistance, high precision load resistance, and current mode voltage transformer (VT), current-limiting resistance, high precision load resistance are connected successively, and high precision load resistance is connected with SoC module.Voltage signal is converted into current signal input SoC module by voltage signal acquisition circuit.
The circuit of described energy pulse output arranges the equipment such as promising PLC realizes the interface of the function such as energy measuring and metering.Impulse output circuit can be according to the requirement of energy meter, exports satisfactory energy count pulse, uses for external unit acquisition counter.
Described LCD display circuit is directly connected with SoC module pin, does not need to add the driving chip of any LCD again.
Described datel circuit has adopted the general MODBUS-RTU communication protocol of electric instrument, can realize all remote data monitoring, and can carry out the setting of far distance instrument parameter.On same circuit, can connect many electric instruments, each electric instrument all can be set its address simultaneously.
The beneficial effects of the utility model are: the utility model dependable performance, image data precision is high, multiple functional, system stability, can replace conventional electric power transmitter, measure indicating instrument, electric energy measurement instrument and relevant auxiliary unit, be suitable for wide popularization and application.
(4) brief description of the drawings
Below in conjunction with accompanying drawing, the utility model is further described.
Fig. 1 is system chart of the present utility model.
Fig. 2 is SoC module circuit diagram of the present utility model.
Fig. 3 is current signal Acquisition Circuit figure of the present utility model.
Fig. 4 is voltage signal acquisition circuit diagram of the present utility model.
Fig. 5 is metrical pulse output circuit circuit diagram of the present utility model.
Fig. 6 is LCD display circuit figure of the present utility model.
In figure, 1 current signal Acquisition Circuit, 2 voltage signal acquisition circuit, 3 power module circuitry, 4 datel circuits, 5 LCD display circuits, 6 metrical pulse output circuits, 7SoC module.
(5) embodiment
Below with reference to accompanying drawing, the specific embodiment of utility model is described in further detail.
As shown in Figure 1, this embodiment comprises SoC module 7, current signal Acquisition Circuit 1, voltage signal acquisition circuit 2, LCD display circuit 5, datel circuit 4, metrical pulse output circuit 6 and power module circuitry 3, it is characterized in that: described SoC module 7 is connected and controls and data transmission with current signal Acquisition Circuit 1, voltage signal acquisition circuit 2, LCD display circuit 5, datel circuit 4, metrical pulse output circuit respectively by data bus, power module circuitry 3 provides power supply energy for whole system.
As shown in Figure 2, described SoC module 7 adopts V9003 SoC chip.V9003 SoC integrated chip electric energy metrical and management function are in one, reliable operation, superior performance, with low cost, it is as the core of electric instrument, because its functional module is abundant, only need only a few external component can apply to electric energy metrical, its measuring accuracy is high, and peripheral circuit is simple, has greatly improved the reliability of system.
Current signal Acquisition Circuit 1 is by current transformer, high precision load resistance, RC the electric circuit constitute, and current transformer, high precision load resistance, RC the electric circuit constitute are connected successively, and RC circuit is connected with SoC module.As shown in Figure 3, CTA, CTB, CTC are that no-load voltage ratio is 1000 current transformer, the A phase of metering circuit, B phase, C Xiang tri-road current signals, be converted to the three little current signals in tunnel through CTA, CTB, tri-current transformers of CTC, be converted to voltage signal through high precision load resistance, pass through again RC circuit, produce high-precision difference voltage signal, send into the internal current signal processing unit of V9003 through V9003 pin 89 ~ 94.
Voltage signal acquisition circuit 2 is made up of current mode voltage transformer (VT), current-limiting resistance, high precision load resistance, and current mode voltage transformer (VT), current-limiting resistance, high precision load resistance are connected successively, and high precision load resistance is connected with SoC module.As shown in Figure 4, PTA, PTB, PTC are current mode voltage transformer (VT), the A phase of metering circuit, B phase, C Xiang San road voltage signal, every road is through 5 current-limiting resistance current limlitings, the electric current producing is passed through to PTA, PTB, tri-current mode voltage transformer (VT) of PTC, voltage signal is converted into three road current signals, then passes through high precision load resistance, enter V9003 internal voltage signal processing unit through V9003 pin 98 ~ 100.
As shown in Figure 5, metrical pulse output circuit 6 arranges the equipment such as promising PLC and realizes the interface of the function such as energy measuring and metering.According to system setting, this impulse output circuit can be according to the requirement of energy meter, exports satisfactory energy count pulse, uses for external unit acquisition counter, has so greatly improved the range of application of this multifunction instrument.
As shown in Figure 6, LCD display circuit 5 is directly connected with SoC module 7 pins, does not need to add the driving chip of any LCD again.Due to V9003 integrated LCD driver, so can directly drive LCD screen, without external lcd driver, so greatly simplify LCD circuit, improve system stability, reduce cost.
Described datel circuit has adopted the general MODBUS-RTU communication protocol of electric instrument, can realize all remote data monitoring, and can carry out the setting of far distance instrument parameter.On same circuit, can connect many electric instruments, each electric instrument all can be set its address simultaneously.
The beneficial effects of the utility model are: the utility model dependable performance, image data precision is high, multiple functional, system stability, can replace conventional electric power transmitter, measure indicating instrument, electric energy measurement instrument and relevant auxiliary unit, be suitable for wide popularization and application.
Claims (6)
1. a multifunctional digital electric instrument, comprise SoC module, current signal Acquisition Circuit, voltage signal acquisition circuit, LCD display circuit, datel circuit, metrical pulse output circuit and power module, it is characterized in that: described SoC module is connected and controls and data transmission with current signal Acquisition Circuit, voltage signal acquisition circuit, LCD display circuit, datel circuit, metrical pulse output circuit respectively by data bus, power module provides power supply energy for whole system.
2. multifunctional digital electric instrument according to claim 1, is characterized in that: above-mentioned SoC module adopts V9003 SoC chip.
3. multifunctional digital electric instrument according to claim 1 and 2, it is characterized in that: above-mentioned current signal Acquisition Circuit is by current transformer, high precision load resistance, RC the electric circuit constitute, current transformer, high precision load resistance, RC the electric circuit constitute are connected successively, and RC circuit is connected with SoC module.
4. multifunctional digital electric instrument according to claim 3, it is characterized in that: above-mentioned voltage signal acquisition circuit is made up of current mode voltage transformer (VT), current-limiting resistance, high precision load resistance, current mode voltage transformer (VT), current-limiting resistance, high precision load resistance are connected successively, and high precision load resistance is connected with SoC module.
5. according to the multifunctional digital electric instrument described in claim 1 or 2 or 4, it is characterized in that: above-mentioned metrical pulse output circuit arranges the equipment such as promising PLC realizes the interface of the function such as energy measuring and metering.
6. according to the multifunctional digital electric instrument described in claim 1 or 2 or 4, it is characterized in that: above-mentioned LCD display circuit is directly connected with SoC module pin, do not need to add again the driving chip of any LCD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420285493.3U CN203909178U (en) | 2014-05-30 | 2014-05-30 | Multifunctional digital electric power meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420285493.3U CN203909178U (en) | 2014-05-30 | 2014-05-30 | Multifunctional digital electric power meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203909178U true CN203909178U (en) | 2014-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420285493.3U Expired - Fee Related CN203909178U (en) | 2014-05-30 | 2014-05-30 | Multifunctional digital electric power meter |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106558991A (en) * | 2015-09-30 | 2017-04-05 | 佳能株式会社 | Power supply device and image processing system |
| CN110154830A (en) * | 2019-04-11 | 2019-08-23 | 汉腾汽车有限公司 | A kind of power battery instrument SOC display control strategy |
-
2014
- 2014-05-30 CN CN201420285493.3U patent/CN203909178U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106558991A (en) * | 2015-09-30 | 2017-04-05 | 佳能株式会社 | Power supply device and image processing system |
| CN110154830A (en) * | 2019-04-11 | 2019-08-23 | 汉腾汽车有限公司 | A kind of power battery instrument SOC display control strategy |
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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: 20141029 Termination date: 20180530 |
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| CF01 | Termination of patent right due to non-payment of annual fee |