CN201021932Y - Power meter based on USB host technology - Google Patents
Power meter based on USB host technology Download PDFInfo
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- CN201021932Y CN201021932Y CNU200720062459XU CN200720062459U CN201021932Y CN 201021932 Y CN201021932 Y CN 201021932Y CN U200720062459X U CNU200720062459X U CN U200720062459XU CN 200720062459 U CN200720062459 U CN 200720062459U CN 201021932 Y CN201021932 Y CN 201021932Y
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- energy meter
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Abstract
The utility model discloses an electric energy meter based on the technology of USB host machines, which comprises a measuring module, a power module, a management module, a communication module, a display module and a USB host machine interface unit, wherein the management module comprises an MCU chipset, an EEPROM memory, a FLASH memory and an RTC real-time clock, the USB host machine interface unit comprises a USB master control chipset, a USB adapter, a protective circuit for power wires and signal wires, the MCU chipset is connected with the USB master control chipset by a parallel port. The utility model applies the technology of USB host machines, and users can store the data of the electric energy meter into a USB disc. Cooperating with the software of an upper computer, the utility model can rapidly produce a daily report, a monthly report, a curve diagram, and the like, for an electrical system, and users can achieve visual and accurate data of the electric energy meter in a short time. With the guarantee of a reasonable and reliable encryption algorithm, users can setup the parameters of the electric energy meter by the USB disc to make the management of electric power simple and quick.
Description
Technical field
The utility model relates to a kind of monitoring device of electric power, is specifically related to a kind of electric energy meter.
Background technology
Along with power system development, for reflecting the running status of electrical network truly, accurately and timely, not only require electric energy meter can real time record electric network state, electric load curve, incident occurrence record, user to the mass data such as various operations of electric energy meter, and requirement higher, that upgrade has been proposed also the corresponding electricity meter-reading technology of taking on the electric energy meter.Present meter reading method is a lot, flourishing, developed regions gradually adopt RS-485 communication, absorption type is infrared and modes such as far infrared interface, power line carrier, GPRS check meter, replace manual metering in the past, but aforesaid way ubiquity or speed is slow, it is poor to be subject to interference reliability, or shortcoming such as operation cost height, can't meet consumers' demand fully.
The utility model content
The purpose of this utility model is to provide a kind of and realizes convenient, easy expansion, lowly disturbs, speed soon, cheaply based on the electric energy meter of usb host technology.
The utility model mainly is made up of metering module, power module, administration module, communication module, display module and usb host interface unit; wherein administration module comprises MCU chip, EEPROM and FLASH storer, RTC real-time clock; the usb host interface unit comprises that by USB main control chip, USB socket, power supply and signal wire holding circuit, described MCU chip is connected with the USB main control chip by the parallel port.
The utility model is the dual-core architecture design of DSP+MCU, the function of measuring of instrument is finished in the DSP unit of metering module, be responsible for data acquisition, power calculation and fft analysis, administration module is mainly finished the management function of instrument such as demonstration, data statistics, storage, communication, electric energy meter function selecting and initialization data setting.The usb host interface unit makes electric energy meter discern the insertion of USB flash disk automatically and withdraws from the USB flash disk of support FAT16 and FAT32 file system.After USB flash disk inserted electric energy meter, electric energy meter carried out a piece certificate (checking the function and the setting of USB device) to USB flash disk, and piece according to after the success, the electric energy meter display screen ejects the USB flash disk actions menu.The user is the selection operation option as required, can realize from EEPROM or FLASH sense data and is stored in automatically in the USB flash disk with file layout, also can search relevant parameters in USB flash disk file is set, and carries out the setting of electric energy meter parameter after opening file.
Use the utility model, the user can use USB flash disk copy reading electric energy meter data, cooperates upper computer software, can generate electric system daily paper, monthly magazine, pattern curve etc. fast, and the user obtains intuitive and accurate electric energy meter data at short notice.Under rationally cryptographic algorithm guaranteed reliably, the user also can be provided with the electric energy meter operational factor by USB flash disk, makes electrical management simple and efficient simultaneously.
Description of drawings
Fig. 1 is the structured flowchart of the utility model one embodiment;
Fig. 2 is the circuit diagram of usb host unit among Fig. 1.
Embodiment
With reference to Fig. 1.Major function of the present utility model unit comprises metering module, power module, administration module, communication module, display module and usb host unit.Wherein, metering module carries out 256 DFT conversion process in real time to electric current and voltage signal, and the result of calculation of DSP is carried out exchanges data by the MCU of high asynchronous serial port and administration module.Administration module is made up of 16 MCU chips, EEPROM and FLASH storer, RTC real-time clock etc., and EEPROM is used for storing electricity data, electric energy meter parameter, logout and important data backup, and FLASH is used to store load curve; The display module of electric energy meter adopts lattice lcd display, realizes the demonstration of electric weight and ammeter parameter; Communication module adopts the SPI interface with being connected of administration module, supports communication Protocol Conversion; Power module for each module for power supply, the input and output power supply is provided.The usb host unit is made up of USB main control chip, USB socket, power supply and signal wire holding circuit.
With reference to Fig. 2.In the usb host unit, USB main control chip U1 adopts CH375A, CH375A selects parallel port signal wires such as input pin 27, interruption output pin 1 to be connected with the MCU chip by data bus D7～D0, address input pin 8, read gate input pin 4, write gate input pin 3, sheet, simultaneously the light emitting diode D7 of the state indication pin 24 external current-limiting resistances of having connected among the CH375A.
For guaranteeing the USB flash disk operate as normal, between CH375A and USB socket, be provided with power supply and signal wire holding circuit.The 5V power Vcc has been connected and has been inserted the pin 1 of USB socket behind diode D5 and the current limliting thermistor F1, prevents the impact of dispatch from foreign news agency to circuit; Pin 4 ground connection of USB socket meet the electrochemical capacitor C1 of 100 μ F/16V between power lead and ground wire, insert the influence of moment to system power supply stability with the filtering USB device; Ground connection after the diode D5 negative pole on the power lead is connected two-way transient suppressor D6, the damage that anti-locking system may cause because of thunderbolt, static; The pin 2,3 of USB socket is connected on UD-and the UD+ data line of CH375A respectively, form the signal wire of the differential signal of transmitting-receiving transmission data, with two signal lines that pin 2,3 is connected on insert current limliting thermistor F2 and F3 respectively, disturb to eliminate line surge, wherein data line UD+ connects power supply and ground connection respectively by D1, D2, data line UD-connects power supply and ground connection respectively by D3, D4, D1～D4 selects fast recovery rectifier diode for use, differential signal is mated, can weaken reflected signal rapidly, reach the purpose of improving signal quality.
Claims (2)
1. electric energy meter based on the usb host technology; mainly form by metering module, power module, administration module, communication module, display module and usb host interface unit; it is characterized in that described administration module comprises MCU chip, EEPROM and FLASH storer, RTC real-time clock; the usb host interface unit comprises that by USB main control chip, USB socket, power supply and signal wire holding circuit, described MCU chip is connected with the USB main control chip by the parallel port.
2. the electric energy meter based on the usb host technology according to claim 1, it is characterized in that: described power supply and signal wire holding circuit are arranged between CH375A and the USB socket, comprise: between power lead and ground wire, meet the electrochemical capacitor C1 of 100 μ F/16V, serially add the pin 1 that inserts USB socket behind the diode D5 serial connection current limliting thermistor F1 on the power lead; Insert two-way transient suppressor D6 at power lead and ground wire; Insert current limliting thermistor F2 and F3 on signal wire respectively, wherein data line UD+ connects power supply and ground connection respectively by D1, D2, and data line UD-connects power supply and ground connection respectively by D3, D4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720062459XU CN201021932Y (en) | 2007-02-08 | 2007-02-08 | Power meter based on USB host technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720062459XU CN201021932Y (en) | 2007-02-08 | 2007-02-08 | Power meter based on USB host technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201021932Y true CN201021932Y (en) | 2008-02-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720062459XU Expired - Lifetime CN201021932Y (en) | 2007-02-08 | 2007-02-08 | Power meter based on USB host technology |
Country Status (1)
| Country | Link |
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| CN (1) | CN201021932Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2407923A3 (en) * | 2010-07-16 | 2012-05-30 | Powertech Industrial Co. Ltd. | Carbon emission tracker and tracking system |
| CN102651150A (en) * | 2011-02-24 | 2012-08-29 | 胜德国际研发股份有限公司 | Carbon emission tracker, carbon emission tracking system and carbon emission tracking method |
| CN103346448A (en) * | 2013-07-20 | 2013-10-09 | 青岛歌尔声学科技有限公司 | Universal serial bus (USB) line system |
| CN104680639B (en) * | 2011-01-28 | 2018-12-14 | 胜德国际研发股份有限公司 | carbon emission tracker |
| CN110244253A (en) * | 2019-06-05 | 2019-09-17 | 辽宁省电能计量器具检定站有限公司 | Provincial measurement centre's standard volume passes online management-control method |
-
2007
- 2007-02-08 CN CNU200720062459XU patent/CN201021932Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2407923A3 (en) * | 2010-07-16 | 2012-05-30 | Powertech Industrial Co. Ltd. | Carbon emission tracker and tracking system |
| US8965717B2 (en) | 2010-07-16 | 2015-02-24 | Powertech Industrial Co., Ltd. | Carbon emission tracker and tracking system |
| CN104680639B (en) * | 2011-01-28 | 2018-12-14 | 胜德国际研发股份有限公司 | carbon emission tracker |
| CN102651150A (en) * | 2011-02-24 | 2012-08-29 | 胜德国际研发股份有限公司 | Carbon emission tracker, carbon emission tracking system and carbon emission tracking method |
| CN102651150B (en) * | 2011-02-24 | 2015-07-15 | 胜德国际研发股份有限公司 | Carbon emission tracker, carbon emission tracking system and carbon emission tracking method |
| CN103346448A (en) * | 2013-07-20 | 2013-10-09 | 青岛歌尔声学科技有限公司 | Universal serial bus (USB) line system |
| CN110244253A (en) * | 2019-06-05 | 2019-09-17 | 辽宁省电能计量器具检定站有限公司 | Provincial measurement centre's standard volume passes online management-control method |
| CN110244253B (en) * | 2019-06-05 | 2021-05-07 | 辽宁省电能计量器具检定站有限公司 | Provincial metering center standard quantity transmission online control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: WEISHENG GROUP CO.,LTD. Free format text: FORMER NAME: CHANGSHA WEISHENG ELECTRONICS CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: No. 359, South Bank Road, Changsha hi tech Industrial Development Zone, Hunan, China: 410013 Patentee after: Wasion Group Co., Ltd. Address before: No. 359, South Bank Road, Changsha hi tech Industrial Development Zone, Hunan, China: 410013 Patentee before: Changsha Weisheng Electronics Co., Ltd. |
|
| C56 | Change in the name or address of the patentee |
Owner name: WEISHENG GROUP CO.,LTD. Free format text: NEW ADDRESS: NO.468, TONGZIPO XI ROAD, CHANGSHA CITY HIGH-TECH INDUSTRIES DEVELOPMENT AREA, HUNAN PROVINCE, ZIP CODE:410013 |
|
| CP02 | Change in the address of a patent holder |
Address after: No. 468 west slope, Tongzi hi tech Industrial Development Zone, Hunan, Changsha 410013, China Patentee after: Wasion Group Co., Ltd. Address before: No. 359, South Bank Road, Changsha hi tech Industrial Development Zone, Hunan, China: 410013 Patentee before: Wasion Group Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20080213 |
|
| CX01 | Expiry of patent term |