CN2840061Y - Electronic type electric energy meter with collecting function - Google Patents
Electronic type electric energy meter with collecting function Download PDFInfo
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- CN2840061Y CN2840061Y CN 200520046211 CN200520046211U CN2840061Y CN 2840061 Y CN2840061 Y CN 2840061Y CN 200520046211 CN200520046211 CN 200520046211 CN 200520046211 U CN200520046211 U CN 200520046211U CN 2840061 Y CN2840061 Y CN 2840061Y
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Abstract
The utility model discloses an electronic type electric energy meter with a collecting function, which is mainly composed of an electric energy meter body. The utility model is characterized in that the inside of the meter body is provided with a data acquisition unit and a single chip computer, and a data display device is arranged on the outer part of the meter body, wherein the lower end of which is provided with a multi-meter signal accessing port and a communication part. The utility model has the advantage of reasonable structure and can save improvement cost from traditional states with no collecting and copying functions to collecting and copying systems, and the utility model effectively takes advantage of energy sources and improves the work efficiency of each department, favorable for people.
Description
Technical field
The utility model relates to the electronic electric energy meter with acquisition function that a kind of function with electric energy meter and data acquisition unit is integrated.
Background technology
Along with the improvement of the people's living standard, to the requirement of quality of life also in continuous raising.The sort of early stage one-storey house groups of building are replaced by flickering high buildings and large mansions.Table counting according to from house to house become more and more difficult by manually copying and accepting.Therefore, need a kind of data acquisition unit,, data conversion is become pulse signal output by metering such as table meter equipment such as electric energy meter, water meter, gas meter, calorimeters with electromechanical or all-electronic three tables.Data acquisition unit is gathered the pulse signal of each table equipment by the constant of every kind of table, by internal calculation, is shown to count certificate accordingly then, is stored in the data acquisition unit.By data concentrator,,, copy and accept host computer (as the PC main website) at last with the data in the each household data acquisition unit by certain means of communication (as RS485 etc.).Yet existing biography electric meter case does not have the space of installation data collector.So need to use this cover system, must change existing biography electric meter case, cost is higher, and has increased mounting hardness.
Summary of the invention
The purpose of this utility model is, provides a kind of and can effectively overcome above-mentioned defective, and can save does not greatly have collection from tradition and copy the improvement cost of state to centralized meter-reading system, and effective use of energy sources improves the work efficiency of all departments.The technical solution of the utility model is, a kind of electronic electric energy meter with acquisition function, mainly form by electric energy meter table body, it is characterized in that: be provided with the external data display equipment that is provided with of a data acquisition unit and scm table in this table body, table body lower end then is provided with multilist signal access port and communications portion.Owing to adopt such scheme, be not difficult to draw and the utlity model has following beneficial effect, the utility model is rational in infrastructure, be skillfully constructed, can save does not greatly have collection from tradition and copies the improvement cost of state to centralized meter-reading system, and effective use of energy sources improves the work efficiency of all departments, be a heroic undertaking of benefiting the nation and the people, have promotional value.
Description of drawings
Below in conjunction with drawings and Examples the present invention is described in further detail.
Figure is a structural representation of the present utility model.
Embodiment
Among the figure, be provided with data acquisition unit 2 and single-chip microcomputer in the electric energy meter table body 1, show the external data display equipment 3 that is provided with, table body lower end then is provided with multilist signal access port 4 and communications portion 5.
Table such as water meter, gas meter, calorimeter meter equipment becomes pulse signal output to data conversion by metering.Electronic electric energy meter with acquisition function is gathered the pulse signal of each table equipment by the constant of every kind of table, by internal calculation, is shown to count certificate accordingly then, is stored in the electric energy meter.By data concentrator,,, copy and accept host computer (as the PC main website) at last with the data in the each household data acquisition unit by certain means of communication (as RS485 etc.).In this electronic electric energy meter of realizing electric energy meter and data acquisition unit are integrated in one with acquisition function.
This utility model can apply to civilian single-phase electric energy meter widely, civilian single-phase multi-rate electric energy meter, and civilian three-phase electric energy meter, civilian three-phase multi-rate electric energy meter, and various industrial high-end electric energy meter, practicality is very extensive.
At this, we illustrate as an example with the simplest civilian single-phase electric energy meter.
This electric energy meter mainly is made up of four parts: power supply, metering, numeral, RS485 communications portion.
Power unit provides power supply for other three parts.Power frequency 220V exchanges and obtains three groups of low-voltage alternating-currents through the transformer step-down, wherein one group is non-isolation output, is formed by the primary tap, and this group output is through diode rectification, capacitance voltage stabilizing obtains the 5V direct current through the step-down of 78L05 stabilivolt again, supplies with metering section work.Other two groups is to isolate output, and by two groups of secondary formation of transformer, the process through overcommutation, voltage stabilizing, step-down obtains two groups of 5V direct currents equally, supplies with numerical portion work for one group, and another organizes the RS485 communications portion work of supplying with.
Metering section adopts the ADE7751 electric energy computation chip of ADI company, and this chip has 3 tunnel 16 A/D ALT-CH alternate channel, and one the tunnel is voltage channel, and two-way is 2 current channels in addition, can take zero respectively, the current signal on the phase line, realizes anti-stealing electricity function.When the electric energy meter operate as normal, zero, the electric current on the phase line is respectively through mutual inductor and corresponding sampling resistor, produce the voltage signal of two-way millivolt level, be input to 2 current channels of chip as the sampled signal of current return, ADE7751 comparison two paths of signals is got wherein, and the greater reaches anti-partial earth stealing pattern as metering usefulness; Simultaneously, the phase piezoelectric voltage is through resistor voltage divider circuit, produce hundreds of millivolts voltage signal, input to the voltage channel of chip as the sampled signal in phase voltage loop, the voltage and current signal becomes digital signal through operational amplifier and A/D conversion, the two is multiplied each other by multiplier and obtains instantaneous power, through low-pass filtering, again by the output of numerical frequency converter conversion becoming pulse signal.
The pulse signal that is produced by ADE7751 is input to numerical portion through light every isolation.Numerical portion can be divided into several parts such as single-chip microprocessor MCU, data storage element EEPROM, data indication, real-time clock, communication module and lithium battery again.Wherein single-chip microcomputer is main, and it realizes functions such as calculating, collection, indication, communication by all the other several parts of control.Single-chip microcomputer has adopted the PIC16LC926 of MICROCHIP.This chip has characteristics such as liquid crystal drive and low-power consumption.It is as follows that it mainly finishes function:
1. electric weight calculates.Every the middle fracture that is input to chip, each pulse produces an interruption to the electric pulse that ADE7751 sends, and enters interrupt service routine through light, and (how many degree electricity of each pulse or what pulses of every degree electricity) calculate electric weight according to the ammeter constant again.
2. multilist pulse collection and calculating.The output pulse of tables such as water meter, gas meter, calorimeter is input to the middle fracture of chip equally, calculates similarly to electric weight, obtains corresponding data according to the constant of each table.Different with fracture in the electric pulse is that fracture also has the interruption arousal function in these.During power failure, transformer is stopped power supply, and supports MCU to enter dormant state by lithium battery, and when water meter etc. had pulse to produce, the signal transformation meeting of middle fracture woke MCU up, makes it enter interrupt routine and finishes metering.
3. data indication.MCU drives the LCD liquid crystal display, and circulation shows the data of current time, date and various tables.As ammeter, it also has the indication of electric pulse lamp.
4. data storing.Adopt the EEPROM 24LC64 of MICROCHIP.This chip has adopted 1
2C interface is communicated by letter with MCU.Storage area with 64Kbits has stored the real time data (7*24=168 data of each table write down) of each table 7 day.Because its non-volatile characteristic, following when electric, the data of storage can not lost.
5. real-time clock.Adopt the RX8025 of EPSON, this chip has adopted 1 equally
2C interface is communicated by letter with MCU.For chip provides clock information, realized regularly storing data function.Provide clock required power supply by standby lithium battery during power down.
6. communication.Finish far infrared and two kinds of communication modes of RS485 by MCU.Far-infrared communication is convenient to that the staff is on-the-spot to read ammeter information by handheld device (PDA).RS485 communication supports the upper level data concentrator that its data are copied and accepted.
7. lithium battery provides power supply for MCU and real-time clock when having a power failure.Gather the function of all the other multilist pulses when realizing having a power failure.Because the low-power consumption characteristic of chip, the lithium current drain has only tens microamperes, and the life-span can reach the more than ten years.
The RS485 communications portion adopts the SN65HVD3082E chip of TI, has 256 nodes.According to the electrical specification of RS485, utilization is one group of power supply power supply independently, and uses up every itself and MCU are partly isolated.This part has mainly realized and the linking to each other of upper level data concentrator, and forms collection diddle-net network.
Claims (1)
1, a kind of electronic electric energy meter with acquisition function, mainly form by electric energy meter table body, it is characterized in that: be provided with the external data display equipment that is provided with of a data acquisition unit and scm table in this table body, table body lower end then is provided with multilist signal access port and communications portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520046211 CN2840061Y (en) | 2005-11-02 | 2005-11-02 | Electronic type electric energy meter with collecting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520046211 CN2840061Y (en) | 2005-11-02 | 2005-11-02 | Electronic type electric energy meter with collecting function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2840061Y true CN2840061Y (en) | 2006-11-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520046211 Expired - Fee Related CN2840061Y (en) | 2005-11-02 | 2005-11-02 | Electronic type electric energy meter with collecting function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2840061Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105807105A (en) * | 2014-12-29 | 2016-07-27 | 施耐德电气工业公司 | Electric power metering device and method thereof |
-
2005
- 2005-11-02 CN CN 200520046211 patent/CN2840061Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105807105A (en) * | 2014-12-29 | 2016-07-27 | 施耐德电气工业公司 | Electric power metering device and method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061122 Termination date: 20101102 |