CN205450106U - Intelligent liquid crystal three -phase LCD - Google Patents
Intelligent liquid crystal three -phase LCD Download PDFInfo
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- CN205450106U CN205450106U CN201620174173.XU CN201620174173U CN205450106U CN 205450106 U CN205450106 U CN 205450106U CN 201620174173 U CN201620174173 U CN 201620174173U CN 205450106 U CN205450106 U CN 205450106U
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Abstract
The utility model relates to the field of power equipment, especially, it includes high frequency switching power supply circuit to relate to an intelligent liquid crystal three -phase LCD, gather filter circuit, the electric energy collection ware, the microprocesso, iron electrical storage, LCD display screen and communication circuit, high frequency switching power supply circuit is respectively for gathering filter circuit, the electric energy collection ware, the microprocesso, iron electrical storage, LCD display screen and the power supply of communication circuit, the output of gathering filter circuit is connected to the input of electric energy collection ware, microprocessor is connected with the electric energy collection ware, microprocessor respectively with indisputable electrical storage, LCD display screen and communication circuit connect. The utility model discloses a high frequency switching power supply circuit power supply mode and self -resuming fuse function for the spoilage greatly reduced of power increases the stability of product, reduces equipment trouble and rates, through adopting accurate mutual -inductor and dedicated electric energy collection chip to improve the precision and the speed of sampling, it is with low costs, the safety and stability.
Description
Technical field
This utility model relates to field of electrical equipment, particularly relates to a kind of intelligent liquid crystal three-phase Multifunctional network electric power instrument.
Background technology
Electric energy meter is used to measure the instrument of electric energy, also known as kilowatt-hour meter, energy meter, electric energy meter, kilowatt-hour table, refers to measure the instrument of various electrical quantities.The most domestic electric energy meter design master chip has been passed by by 8 MCU to the general dsp even change of special DSP, and the inferior position of the application scheme of general dsp is professional application and the problem that embedding degree is the deepest, the high expensive of DSP；Scheme based on ARM has also occurred, but the ARM7TDMI being suitable for application is unsatisfactory in performance, peripheral hardware inadequate resource simultaneously；And the complexity of more high-end ARM9 system is the highest, cost is the highest.The most displeased electric energy meter going to use this high cost of the most a lot of enterprises, such market is with regard to serious shrink, so to study a kind of high-performance, low cost, the electric energy meter met customer need, fill up this vacancy.
The development of electric energy meter have passed through machinery instrument, simulation electronic instrument, digital and electronic instrument and smart electronics instrument four-stage, and the instrument market of front three phases is the most fewer and feweri, and intelligent electric energy meter is occupying major part industrial market.
General of intelligence instrument on market also exists problems with:
1) power source design is immature, mostly uses the power supply mode of AC transformer, poor anti jamming capability, easily damages, unrepairable；
2) certainty of measurement is the highest, and the voltage current transformer precision of employing is the highest, and ADC conversion accuracy is poor, general 8～10.
3) sample rate is slow, and direct multi-point sampling value, speed less goes up；
4) can not communication, can only offline operation, it is impossible to remotely manage；
5) external interface is few, only pulse output, open into/output, analog quantity, the interface such as communication disappearance；
6) cost is high, uses dsp chip；
7) charactron or segment encode LCD show, it is impossible to display complete character, arrange inconvenience；
Utility model content
The technical problems to be solved in the utility model is to provide a kind of precision height, capacity of resisting disturbance strong and the intelligent liquid crystal three-phase Multifunctional network electric power instrument of low cost.
The technical scheme realizing this utility model purpose is: intelligent liquid crystal three-phase Multifunctional network electric power instrument, including hf switching power supply, gather filter circuit, energy harvester, microprocessor, ferroelectric memory, LCD display and telecommunication circuit, hf switching power supply respectively gathers filter circuit, energy harvester, microprocessor, ferroelectric memory, LCD display and communicating circuit are powered, the input of energy harvester connects the outfan gathering filter circuit, microprocessor is connected with energy harvester, microprocessor respectively with ferroelectric memory, LCD display and telecommunication circuit connect.
As prioritization scheme of the present utility model; hf switching power supply includes resettable fuse, surge protection circuit, ac-dc converter circuit and Multichannel isolating voltage circuit; the outfan of 220V or 380V alternating current power supply connects resettable fuse; the outfan of surge protection circuit connects the input of ac-dc converter circuit; the outfan of ac-dc converter circuit connects the input of Multichannel isolating voltage circuit, the three road voltages that the output of Multichannel isolating voltage circuit is mutually isolated.
As prioritization scheme of the present utility model; gather filter circuit and include accurate voltage or current transformer, RC wave filter and TVS protection circuit; the input of RC wave filter connects the outfan of accurate voltage current transformer, and described TVS protection circuit is separately positioned on input and the outfan gathering filter circuit.
As prioritization scheme of the present utility model, energy harvester is high-precision AD E7880 electric energy acquisition chip.
As prioritization scheme of the present utility model, microprocessor is Cortex-M3 series enhancement mode STM32F103RBT6 chip.
As prioritization scheme of the present utility model, ferroelectric memory passes through I2C communication interface carries out data transmission with microprocessor.
As prioritization scheme of the present utility model, telecommunication circuit is carried out data transmission with microprocessor by UART communication interface, and telecommunication circuit is for carrying out communication with external communication device.
This utility model has a positive effect: (1) hf switching power supply of the present utility model power supply mode and resettable fuse function so that the spoilage of power supply is substantially reduced, and increases stablizing of product, reduces equipment failure rate；
(2) this utility model is by using precision transformer and special electric energy acquisition chip to improve the accuracy and speed of sampling, it is ensured that the high-performance of product.
(3) this utility model uses Cortex-M3 master control scheme so that product improves performance, reduces cost, accelerates development rate.
(4) graphic dot matrix liquid crystal display of the present utility model ensure that the operability of product and the intuitive of display, has beautified the outward appearance of product.
Accompanying drawing explanation
In order to make content of the present utility model be easier to be clearly understood, below according to specific embodiment and combine accompanying drawing, this utility model is described in further detail:
Fig. 1 is structured flowchart of the present utility model；
Fig. 2 is the circuit diagram of hf switching power supply.
Wherein: 1, hf switching power supply, 2, gather filter circuit, 3, energy harvester, 4, microprocessor, 5, ferroelectric memory, 6, LCD display, 7, telecommunication circuit.
Detailed description of the invention
As shown in Figure 1, the utility model discloses intelligent liquid crystal three-phase Multifunctional network electric power instrument, including hf switching power supply 1, gather filter circuit 2, energy harvester 3, microprocessor 4, ferroelectric memory 5, LCD display 6 and telecommunication circuit 7, hf switching power supply 1 is respectively and gathers filter circuit 2, energy harvester 3, microprocessor 4, ferroelectric memory 5, LCD display 6 and communicating circuit 7 are powered, the input of energy harvester 3 connects the outfan gathering filter circuit 2, microprocessor 4 is connected with energy harvester 3, microprocessor 4 respectively with ferroelectric memory 5, LCD display 6 and telecommunication circuit 7 connect.
As shown in Figure 2; hf switching power supply 1 includes resettable fuse, surge protection circuit, ac-dc converter circuit and Multichannel isolating voltage circuit; the outfan of 220V or 380V alternating current power supply connects resettable fuse; the outfan of surge protection circuit connects the input of ac-dc converter circuit; the outfan of ac-dc converter circuit connects the input of Multichannel isolating voltage circuit, the three road voltages that the output of Multichannel isolating voltage circuit is mutually isolated.Hf switching power supply 1 uses high frequency switch power to power, and input mode is flexible, and AC/DC universal, resettable fuse once trouble shooting can restore electricity voluntarily, and surge protection circuit greatly strengthen capacity of resisting disturbance.The employing Multichannel isolating voltage way of output, the main 5V of output, secondary 5V and 12V tri-road voltage. three road voltages are mutually isolated, make the work of intelligent liquid crystal three-phase Multifunctional network electric power instrument safer.
Gathering filter circuit 2 and include accurate voltage or current transformer, RC wave filter and TVS protection circuit, the input of RC wave filter connects the outfan of accurate voltage current transformer, and TVS protection circuit is separately positioned on input and the outfan gathering filter circuit 2.By using 0.1 grade of accurate voltage or current transformer, RC filter circuit and TVS protection circuit, make front-end collection precision higher, safer.
Energy harvester 3 is high-precision AD E7880 electric energy acquisition chip, phase three-wire three and the three-phase and four-line mode of connection, external 13.684MHZ crystal oscillator, tape pulse output function can be measured, interrupt output function and harmonic measurement function, by SPI interface and microprocessor 4 communication.By using high accuracy, high-speed dedicated electric energy acquisition chip, fast operation, acquisition precision is high.
Microprocessor 4 is Cortex-M3 series enhancement mode STM32F103RBT6 chip, maximum speed be 72MHZ, FLASH space be 256M, latest generation ARMv7 kernel, named Cortex, compared with ARM7/9/10/11, architecturally had revolutionary breakthrough.It uses efficient Harvard structure three class pipeline, reaches 1.25DMIPS/MHz, reaches 0.06mW/MHz in power consumption especially.Cortex-M3 uses Thumb-2 instruction set, automatic 16/32 mixing arrangement.Monocyclic 32 multiplication and hardware divider, ensureing that the operational capability of Cortex-M3 is greatly improved, Cortex-M3 comprises nested vector interrupt controller NVIC, Response time the fastest only 6 cycles, it is internally integrated bus matrix, supports that dma operation and position map.The low cost of microprocessor 4, performance is high, and processing speed is fast.
Ferroelectric memory 5 is carried out data transmission with microprocessor 4 by I2C communication interface, use the FM24CL64 ferroelectric memory of RAMTRON company, ensure to arrange parameter and electric energy long-time operation, storage is not lost, can persistently read and write 1,000,000,000 times, holding time, communication speed was up to 400KHZ more than 38 years.
LCD display 6 ensure that the intuitive of operability and display, has beautified the outward appearance of product, and display uses the 190X190 Graphic lattice LCD of long aobvious electronics, and display is clear, and attractive in appearance, by 8 parallel ports and main control chip communication, speed is faster.Using graphic dot matrix liquid crystal display screen, can show complete Chinese and English Chinese character and character, arrange conveniently, display is clear.
Telecommunication circuit 7 is carried out data transmission with microprocessor 4 by UART communication interface; telecommunication circuit 7 is for carrying out communication with external communication device; communicating circuit 7 uses the level conversion RS485ESA communication chip of MAXIM; carry port voltage protection up to positive and negative 15KV; 32 node load abilities, input/output port uses high speed photo coupling isolation.External communication device refers to want Remote or monitor the equipment of intelligent liquid crystal three-phase Multifunctional network electric power instrument.
This intelligent liquid crystal three-phase Multifunctional network electric power instrument also includes expansion module, this expansion module On-off signal uses light-coupled isolation, 12v built-in voltage exports, can external passive dry contact, output switch parameter use optocoupler add the passive output of relay mode, 220v can be accessed, the load of 5A, can also do warning output, analog output uses isolation method, 0-10v or 4-20/0-20MA can be selected to export.
Particular embodiments described above; the purpose of this utility model, technical scheme and beneficial effect are further described; it is it should be understood that; the foregoing is only specific embodiment of the utility model; it is not limited to this utility model; all within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. done, within should be included in protection domain of the present utility model.
Claims (7)
- nullThe most intelligent liquid crystal three-phase Multifunctional network electric power instrument，It is characterized in that: include hf switching power supply (1)、Gather filter circuit (2)、Energy harvester (3)、Microprocessor (4)、Ferroelectric memory (5)、LCD display (6) and telecommunication circuit (7)，Described hf switching power supply (1) respectively gathers filter circuit (2)、Energy harvester (3)、Microprocessor (4)、Ferroelectric memory (5)、LCD display (6) and communicating circuit (7) power supply，The input of described energy harvester (3) connects the outfan gathering filter circuit (2)，Described microprocessor (4) is connected with energy harvester (3)，Described microprocessor (4) respectively with ferroelectric memory (5)、LCD display (6) and telecommunication circuit (7) connect.
- Intelligent liquid crystal three-phase Multifunctional network electric power instrument the most according to claim 1, it is characterized in that: described hf switching power supply (1) includes resettable fuse, surge protection circuit, ac-dc converter circuit and Multichannel isolating voltage circuit, the outfan of 220V or 380V alternating current power supply connects resettable fuse, the outfan of surge protection circuit connects the input of ac-dc converter circuit, the outfan of ac-dc converter circuit connects the input of Multichannel isolating voltage circuit, the three road voltages that described Multichannel isolating voltage circuit output is mutually isolated.
- Intelligent liquid crystal three-phase Multifunctional network electric power instrument the most according to claim 1; it is characterized in that: described collection filter circuit (2) includes accurate voltage or current transformer, RC wave filter and TVS protection circuit; the input of RC wave filter connects the outfan of accurate voltage current transformer, and described TVS protection circuit is separately positioned on input and the outfan gathering filter circuit (2).
- Intelligent liquid crystal three-phase Multifunctional network electric power instrument the most according to claim 1, it is characterised in that: described energy harvester (3) is high-precision AD E7880 electric energy acquisition chip.
- Intelligent liquid crystal three-phase Multifunctional network electric power instrument the most according to claim 1, it is characterised in that: described microprocessor (4) is Cortex-M3 series enhancement mode STM32F103RBT6 chip.
- Intelligent liquid crystal three-phase Multifunctional network electric power instrument the most according to claim 1, it is characterised in that: described ferroelectric memory (5) is carried out data transmission with microprocessor (4) by I2C communication interface.
- Intelligent liquid crystal three-phase Multifunctional network electric power instrument the most according to claim 1, it is characterized in that: described telecommunication circuit (7) is carried out data transmission with microprocessor (4) by UART communication interface, described telecommunication circuit (7) is for carrying out communication with external communication device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620174173.XU CN205450106U (en) | 2016-03-07 | 2016-03-07 | Intelligent liquid crystal three -phase LCD |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620174173.XU CN205450106U (en) | 2016-03-07 | 2016-03-07 | Intelligent liquid crystal three -phase LCD |
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| CN205450106U true CN205450106U (en) | 2016-08-10 |
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| CN201620174173.XU Active CN205450106U (en) | 2016-03-07 | 2016-03-07 | Intelligent liquid crystal three -phase LCD |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114660344A (en) * | 2022-05-20 | 2022-06-24 | 上海红檀智能科技有限公司 | Measurement and control method of network power instrument with voltage and current relay function |
| CN117110667A (en) * | 2023-10-20 | 2023-11-24 | 江苏华鹏智能仪表科技股份有限公司 | Collector suitable for power supply field |
-
2016
- 2016-03-07 CN CN201620174173.XU patent/CN205450106U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114660344A (en) * | 2022-05-20 | 2022-06-24 | 上海红檀智能科技有限公司 | Measurement and control method of network power instrument with voltage and current relay function |
| CN117110667A (en) * | 2023-10-20 | 2023-11-24 | 江苏华鹏智能仪表科技股份有限公司 | Collector suitable for power supply field |
| CN117110667B (en) * | 2023-10-20 | 2023-12-26 | 江苏华鹏智能仪表科技股份有限公司 | Collector suitable for power supply field |
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Address after: 213000 No. 3 sail Road, economic development zone, Wujin District, Jiangsu, Changzhou Patentee after: Su Wen electric energy Polytron Technologies Inc Address before: 213000 No. 3 sail Road, economic development zone, Wujin District, Jiangsu, Changzhou Patentee before: SUWEN ELECTRIC ENERGY SCIENCE AND TECHNOLOGY CO., LTD. |