CN203350358U - Single-phase intelligent electric energy meter - Google Patents
Single-phase intelligent electric energy meter Download PDFInfo
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- CN203350358U CN203350358U CN 201320454198 CN201320454198U CN203350358U CN 203350358 U CN203350358 U CN 203350358U CN 201320454198 CN201320454198 CN 201320454198 CN 201320454198 U CN201320454198 U CN 201320454198U CN 203350358 U CN203350358 U CN 203350358U
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Abstract
The utility model discloses a single-phase intelligent electric energy meter. The electric energy meter comprises a power supply module, a voltage sampling module, a current manganin sampling module, a current CT sampling module, a button input module, a carrier-wave communication module, an RS485 communication module, an infrared communication module, a signal alarm light, a liquid-crystal display screen, an ESAM module, an inner card storage module and a SOC chip, wherein the power supply module supplies power for the SOC chip, and the SOC chip is connected with all the above modules and used for management and metering of the electric energy meter, RTC clock verification, LCD liquid-crystal driving, data communication and storage, etc. According to the utility model, a single highly integrated SOC chip is used instead of the management MCU, dedicated metering chip, dedicated clock chip and dedicated liquid crystal driving chip in the conventional electric energy meter, so that the safety performance of the electric energy meter is improved, and the costs in hardware and production and material management of the electric energy meter are reduced, thereby significantly increasing the overall cost performance of the electric energy meter.
Description
Technical field
The utility model relates to a kind of single-phase intelligent electric energy meter.
Background technology
At present, existing single-phase intelligent electric energy meter comprises that management MCU, the special metering IC, special clock chip, special liquid crystal drive chip, power module, voltage sample module, current sample module, keyboard input module, communication module, LCDs, ESAM module and memory module, by management, MCU is managed control to each function element, but this technical scheme device is many, cost is high, also affects system reliability simultaneously.
The utility model content
The purpose of this utility model is to provide the single-phase intelligent electric energy meter that a kind of cost performance is high.
This single-phase intelligent electric energy meter that the utility model provides, comprise power module, voltage sample module, electric current copper-manganese sampling module, electric current CT sampling module, keyboard input module, carrier communication module, RS485 communication module, infrared communication module, signal alarm lamp, LCDs, ESAM module, interior card memory module and SOC chip, for management and metering, RTC clock check and the LCD liquid crystal drive of electric energy meter, power module is to the SOC chip power supply, the AD sample port of SOC chip is connected with the voltage sample module, the AD sample port of this chip is connected with electric current copper-manganese sampling module, the AD sample port of this chip is connected with electric current CT sampling module, the IO port of this chip is connected with keyboard input module, this chip is connected with carrier communication module by serial ports, this chip is connected with the RS485 communication module by serial ports, this chip is connected with infrared communication module by serial ports, the IO port of this chip is connected with the signal alarm lamp, the COM port of this chip is connected with LCDs with the SEG port, the IO port of this chip is connected with the ESAM module, this chip is connected with interior card memory module by the I2C bus.
Described SOC chip adopts the processor chips that TI company model is MSP430F6736.Described keyboard input module comprises three road key circuits, is respectively the normally closed key circuit that detects for uncapping, for the programming key circuit of input of programming, for showing the aobvious key circuit of following of page turning.Described signal alarm lamp comprises three kinds of alarm lamps, is respectively alarm lamp for fault alarm, for the tripping operation pilot lamp of the indication of tripping with for the pulse output indicator of output power signal designation.
The SOC chip of single high integration of the utility model utilization replaces management MCU, the special metering IC, special clock chip, the special liquid crystal in conventional electric energy meter design proposal to drive chip, this design proposal has been broken the design proposal of traditional electric energy meter, further improved the security performance of electric energy meter, reduce the hardware cost of electric energy meter and production, handling of goods and materials cost, thereby significantly improved the cost performance of the whole table of electric energy meter.
The accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model.
Embodiment
As shown in Figure 1, the utility model comprises power module, voltage sample module, electric current copper-manganese sampling module, electric current CT sampling module, keyboard input module, carrier communication module, RS485 communication module, infrared communication module, signal alarm lamp, LCDs, ESAM module, interior card memory module and SOC chip, for management and metering, RTC clock check and the LCD liquid crystal drive of electric energy meter, power module is to the SOC chip power supply, the AD sample port of SOC chip is connected with the voltage sample module, the AD sample port of this chip is connected with electric current copper-manganese sampling module, the AD sample port of this chip is connected with electric current CT sampling module, the IO port of this chip is connected with keyboard input module, this chip is connected with carrier communication module by serial ports, this chip is connected with the RS485 communication module by serial ports, this chip is connected with infrared communication module by serial ports, the IO port of this chip is connected with the signal alarm lamp, the COM port of this chip is connected with LCDs with the SEG port, the IO port of this chip is connected with the ESAM module, this chip is connected with interior card memory module by the I2C bus.
Below according to different functional modules, the utility model is described in further detail.
1. voltage, current analog front end are inputted and the high-precision A/D sampling module
Voltage sample is the voltage of measuring on divider resistance, indirectly extrapolates input voltage value.The sampling of electric current copper-manganese is the sampling to input current, and owing to not being directly easily to current measurement, so circuit adopts round-about way, the voltage on the copper-manganese that input current is flow through is sampled, and finally indirectly calculates to obtain input current value.Electric current CT sampling is the sampling to output current, is by gathering ohmically voltage equally, realizes the indirect measurement to electric current.Electric current CT sampling is used in conjunction with the sampling of electric current copper-manganese, and the electric current in detection of grid, particularly can prevent the illegal stealing of user well.The SOC integrated chip that the utility model adopts 24 sigma-delta ADC of high precision, can obtain all very high digital signals of precision and resolution by sigma-delta ADC sampling, for follow-up metering algorithm provides reliable sampled data.
2. LCD MODULE
Because carrying LCD, SOC chip of the present utility model drives, so only need in the light of actual conditions reasonable distribution COM port and SEG port to get final product when design is used.
During specific works, what the utility model was selected is the liquid crystal display of 8COM, 17SEG, so only need to distribute pin, with the pin of LCDs, is connected and gets final product one to one.
3. communication module
Communication module of the present utility model comprises infrared communication module, RS485 communication module, carrier communication module.The SOC chip is connected the row data communication of going forward side by side respectively with this three classes communication module by serial ports.
Infrared communication module comprises infrared transtation mission circuit and infrared receiving circuit.Infrared receiving circuit mainly is comprised of infrared receiving tube, the infrared signal of the 38kHz that modulated can be resolved to the signal before modulation.
The RS485 communication module is the important module that electric energy meter is communicated by letter with host computer, and what the RS485 communication module was transmitted is differential signal, therefore has the characteristics that signal is difficult for decay, long transmission distance.The RS485 communication module comprises RS485 communications reception unit and RS485 communications transmit unit.
What the utility model adopted is existing carrier communication module, and the SOC chip is connected with carrier communication module by serial ports.
4. data storage and encryption thereof
Interior card module of the present utility model is for the data storage, and the ESAM module is for the data encryption management.Interior card module of the present utility model is actually the EEPROM storage chip that a model is 24LC256.The SOC chip carries out data interaction by I2C bus and interior card module.
5. human-computer interaction module
Human-computer interaction module comprises keyboard input module and alarm lamp.
Keyboard input module of the present utility model comprises three road key circuits, is respectively normally closed key circuit, the key circuit of programming, follows aobvious key circuit.Normally closed key circuit is for uncapping detection, and the programming key circuit, for programming input, follows aobvious key circuit for showing page-turning function.
The utility model comprises three kinds of alarm lamps, is respectively alarm lamp, tripping operation pilot lamp and pulse output indicator.Alarm lamp is for fault alarm, and the tripping operation pilot lamp is for tripping indication, and the pulse output indicator is for the output power signal designation.
6. other module of SOC chip internal
The SOC chip internal also comprises RTC clock module, timer internal module, internal temperature sensor module, builtin voltage sensor assembly etc.The RTC module can realize permanent calendar function by arranging, and in addition, the RTC module can coordinate practicality with internal temperature sensor, voltage sensor, by the soft clock algorithm, realizes the error compensation function to pulse per second (PPS).
Claims (4)
1. a single-phase intelligent electric energy meter, comprise power module, voltage sample module, electric current copper-manganese sampling module, electric current CT sampling module, keyboard input module, carrier communication module, RS485 communication module, infrared communication module, signal alarm lamp, LCDs, ESAM module and Nei Ka memory module, it is characterized in that: also comprise the SOC chip, for management and metering, RTC clock check and the LCD liquid crystal drive of electric energy meter, power module is to the SOC chip power supply, the AD sample port of SOC chip is connected with the voltage sample module, the AD sample port of this chip is connected with electric current copper-manganese sampling module, the AD sample port of this chip is connected with electric current CT sampling module, the IO port of this chip is connected with keyboard input module, this chip is connected with carrier communication module by serial ports, this chip is connected with the RS485 communication module by serial ports, this chip is connected with infrared communication module by serial ports, the IO port of this chip is connected with the signal alarm lamp, the COM port of this chip is connected with LCDs with the SEG port, the IO port of this chip is connected with the ESAM module, this chip is connected with interior card memory module by the I2C bus.
2. single-phase intelligent electric energy meter according to claim 1 is characterized in that: described SOC chip adopts the processor chips that TI company model is MSP430F6736.
3. single-phase intelligent electric energy meter according to claim 1, it is characterized in that: described keyboard input module comprises three road key circuits, is respectively the normally closed key circuit that detects for uncapping, for the programming key circuit of input of programming, for showing the aobvious key circuit of following of page turning.
4. single-phase intelligent electric energy meter according to claim 1, it is characterized in that: described signal alarm lamp comprises three kinds of alarm lamps, is respectively alarm lamp for fault alarm, for the tripping operation pilot lamp of the indication of tripping with for the pulse output indicator of output power signal designation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320454198 CN203350358U (en) | 2013-07-29 | 2013-07-29 | Single-phase intelligent electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320454198 CN203350358U (en) | 2013-07-29 | 2013-07-29 | Single-phase intelligent electric energy meter |
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| Publication Number | Publication Date |
|---|---|
| CN203350358U true CN203350358U (en) | 2013-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320454198 Expired - Lifetime CN203350358U (en) | 2013-07-29 | 2013-07-29 | Single-phase intelligent electric energy meter |
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| Country | Link |
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| CN (1) | CN203350358U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104504129A (en) * | 2014-12-31 | 2015-04-08 | 潍坊五洲浩特电气有限公司 | Information inquiring terminal of household intelligent electric meter |
| CN106154030A (en) * | 2015-03-30 | 2016-11-23 | 杭州力控科技有限公司 | A kind of intelligent electric meter and data encryption and transmission method thereof |
| CN106569029A (en) * | 2016-11-25 | 2017-04-19 | 华立科技股份有限公司 | Single-phase intelligent electric meter |
| CN107356810A (en) * | 2017-07-10 | 2017-11-17 | 天津工业大学 | Digital electricity meter based on MSP430FEX family chips |
| CN113075609A (en) * | 2021-04-13 | 2021-07-06 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Wave recording metering system |
-
2013
- 2013-07-29 CN CN 201320454198 patent/CN203350358U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104504129A (en) * | 2014-12-31 | 2015-04-08 | 潍坊五洲浩特电气有限公司 | Information inquiring terminal of household intelligent electric meter |
| CN106154030A (en) * | 2015-03-30 | 2016-11-23 | 杭州力控科技有限公司 | A kind of intelligent electric meter and data encryption and transmission method thereof |
| CN106154030B (en) * | 2015-03-30 | 2019-08-20 | 杭州力控科技有限公司 | A kind of intelligent electric meter and its data encryption and transmission method |
| CN106569029A (en) * | 2016-11-25 | 2017-04-19 | 华立科技股份有限公司 | Single-phase intelligent electric meter |
| CN107356810A (en) * | 2017-07-10 | 2017-11-17 | 天津工业大学 | Digital electricity meter based on MSP430FEX family chips |
| CN113075609A (en) * | 2021-04-13 | 2021-07-06 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Wave recording metering system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131218 |