CN203101506U - Three-phase digital smart meter - Google Patents
Three-phase digital smart meter Download PDFInfo
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- CN203101506U CN203101506U CN 201220691761 CN201220691761U CN203101506U CN 203101506 U CN203101506 U CN 203101506U CN 201220691761 CN201220691761 CN 201220691761 CN 201220691761 U CN201220691761 U CN 201220691761U CN 203101506 U CN203101506 U CN 203101506U
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Abstract
The utility model provides a three-phase digital smart meter comprising an input and output module, a minimum system module, a human-computer interface module and a communication module; the input output module, the human-computer interface module and the communication module are respectively connected with the minimum system module; the minimum system module comprises a power module, a reset unit, a microprocessor and a storage unit; the power module is provided with a lightning protection circuit and a switch power source; external AC current passes the lightning protection circuit and the switch power source and then generates two separated paths of 5V DC voltage; one path powers up the communication module; and the other path powers up the input output module, the microprocessor, the storage unit and the human-computer interface module. The three-phase digital smart meter is safe, reliable, good in running state, strong in compatibility, can monitor power supply network in real time, and satisfies requirements of a smart grid.
Description
Technical field
The utility model relates to Smart Home, intelligent electric meter and intelligent grid field, relates in particular to a kind of three-phase digital intelligent electric meter.
Background technology
At present, along with national economy increases fast, intelligent grid is put into the strategic decision of future development.Intelligent electric meter is as the important component part of intelligent grid, is one of power department important step of optimizing management of power use process, also is to realize data interactive, the accurate key of metering and intelligent scheduling.Intelligence instrument should have following function in the intelligent grid: more pay attention to information processing, interaction, metering and communicate by letter, and corresponding with the detail record of realizing customer charge information with load.Yet existing intelligent electric meter obviously can't satisfy this requirement.
All trades and professions, especially commercial power is extensive, power consumption is big, power consumption is many, the requirement power supply safety is reliable, can satisfy the user to the electric power networks requirement of monitoring in real time, and according to the result who monitors, control effectively, improve the safe reliability of power supply, help the user to improve power consumption efficiency, energy savings, requirement such as reduce cost.Therefore, design a kind of safe and reliable, running status is good, compatible strong, can monitor in real time supply network, comprise that full electric measurement, the quality of power supply, power down are not lost, the novel intelligent ammeter of functions such as logout, communication, digital quantity input and output and analog quantity input and output seems more urgent and have great importance.
The utility model content
In order to solve the problems of the prior art, it is a kind of safe and reliable that the utility model provides, and running status is good, compatible strong, can monitor in real time supply network, pay attention to information processing, interaction, metering and the three-phase digital intelligent electric meter of communicating by letter, to satisfy the requirement of intelligent grid.
The utility model provides a kind of three-phase digital intelligent electric meter, comprises input/output module, minimum systematic module, human-computer interface module and communication module; Described input/output module, human-computer interface module and communication module are connected with described minimum systematic module respectively; Described minimum systematic module comprises power module, reset unit, microprocessor and storage unit; Described power module is provided with lightning protection circuit and Switching Power Supply, the external communication electricity produces the 5V DC voltage that two-way is isolated after described lightning protection circuit and Switching Power Supply, one the tunnel is described communication module power supply, and another road is input/output module, microprocessor, storage unit and human-computer interface module power supply.
As further improvement of the utility model, described input/output module comprises digital quantity input module, digital quantity output module, analog quantity load module and analog output module; Described digital quantity input module comprises photoelectricity coupled circuit, filtering de-twitter circuit, lightning protection buffer circuit, is used to detect the on off state of power equipment; Described digital quantity output module comprises buffer circuit and driving circuit, is used for being connected with the repeat circuit of electric power networks, and the real-time guard electric power networks; Described analog quantity load module comprises voltage/current mutual inductor, filtering circuit, gain circuitry, A/D sample circuit, according to sampled digital signal, calculates the status information of electric power networks; Described analog output module comprises the magnetic buffer circuit, drives amplifying circuit, signal processing circuit, is used to export 4--20mA electric current or 0--5V voltage, realizes transmitter functions.
As further improvement of the utility model, described power module also is provided with DC/DC converter and low pressure difference linear voltage regulator; It is the two-way DC voltage of 24V and 3.3V that described another road 5V DC voltage produces magnitude of voltage through DC/DC converter, low pressure difference linear voltage regulator respectively; The DC voltage of described 24V is described digital quantity input module power supply, and described 3.3V DC voltage is described microprocessor, storage unit, analog quantity load module and human-computer interface module power supply
As further improvement of the utility model, described communication module is the RS485 communication module of employing standard Modbus-RTU communication protocol.
As further improvement of the utility model, described storage unit comprises EEPROM (Electrically Erasable Programmable Read Only Memo) and ferroelectric memory; What described ferroelectric memory was used to store the three-phase digital intelligent electric meter is provided with parameter and calibration parameter.
As further improvement of the utility model, described human-computer interface module comprise real-time demonstration electric power networks status information lcd screen, check and be provided with the push-button unit of three-phase digital intelligent electric meter operational factor and show the LED electric current rod of electric power networks size of current in real time.
As further improvement of the utility model, described lcd screen shows parameter setting, the quality of power supply, measurement inquiry, parameter query, device maintenance and the logout of electric power networks in real time, and shown menu is taked the tree design.
As further improvement of the utility model, described push-button unit comprises left and right directions key, up and down arrow keys, setting key and four buttons of return key.
As further improvement of the utility model, described LED electric current rod comprises a plurality of LED lamps that are arranged in order, and the real-time current of equipment under test directly determines bright lamp quantity:
When the real-time current of equipment under test greater than zero and when being less than or equal to the rated current of equipment under test, bright lamp quantity is y=[x1*I/In];
When the real-time current of equipment under test greater than the rated current of equipment under test and when being less than or equal to the rated current of 1.2 times of equipment under tests, bright lamp quantity is y=[x1+ (x2*I/ (1.2*In))];
When the real-time current of equipment under test during greater than the rated current of 1.2 times of equipment under tests, bright lamp quantity is y=x1+x2+x3;
Wherein, y is the quantity of bright lamp, and x1 is the quantity of first kind of color LED lamp, and x2 is the quantity of second kind of color LED lamp, and x3 is the quantity of color LED lamp in the 3rd, and I is the real-time current of equipment under test, and In is the rated current of equipment under test.
As further improvement of the utility model, described minimum systematic module also is provided with reserve battery, described reserve battery is connected with described communication module, DC/DC converter and low pressure difference linear voltage regulator respectively, and described reserve battery is this three-phase digital intelligent electric meter power supply when the power down of external communication electricity.
The beneficial effects of the utility model are: the three-phase digital intelligent electric meter that the utility model provides is more safe and reliable, running status is good, compatible strong, can monitor in real time supply network, comprise that full electric measurement, the quality of power supply, power down are not lost, function such as logout, communication, digital quantity input and output and analog quantity input and output, and can be according to the result of monitoring, control effectively, improve the safe reliability of power supply, help the user to improve power consumption efficiency, energy savings, reduce cost, can satisfy the requirement of intelligent grid.
Description of drawings
Fig. 1 is the hardware capability module map of three-phase digital intelligent electric meter among the utility model embodiment;
Fig. 2 is the hardware block diagram of three-phase digital intelligent electric meter among the utility model embodiment;
Fig. 3 is the power supply architecture block diagram of three-phase digital intelligent electric meter among the utility model embodiment;
Fig. 4 is a digital quantity input module structured flowchart among the utility model embodiment;
Fig. 5 is a digital quantity output module structured flowchart among the utility model embodiment;
Fig. 6 is an analog quantity load module structured flowchart among the utility model embodiment;
Fig. 7 is an analog output module structured flowchart among the utility model embodiment;
Fig. 8 is the structured flowchart of human-computer interface module among the utility model embodiment;
Fig. 9 is the tree menu structural drawing that lcd screen shows among the utility model embodiment;
Figure 10 is the structural drawing of push-button unit among the utility model embodiment;
Figure 11 is the master menu that lcd screen shows among the utility model embodiment;
Figure 12 is that the button that lcd screen shows among the utility model embodiment switches display message;
Figure 13 is the constitutional diagram of LED electric current rod among the utility model embodiment;
Figure 14 is three-phase digital intelligent electric meter and other ammeter comparison diagram among the utility model embodiment.
Identify among the figure: the 1-input/output module; 11-digital quantity input module (DI); 111-photoelectricity coupled circuit; 112-filtering de-twitter circuit; 113-lightning protection buffer circuit; 12-digital quantity output module (DO); The 121-buffer circuit; The 122-driving circuit; 13-analog quantity load module (AI); 131-voltage/current mutual inductor; The 132-filtering circuit; The 133-gain circuitry; 134-A/D sample circuit; 14-analog output module (AO); The 141-buffer circuit; 142-drives amplifying circuit; The 143-signal processing circuit; The 2-minimum systematic module; The 21-power module; The 211-lightning protection circuit; The 212-Switching Power Supply; The 213-DC/DC converter; 214-low pressure difference linear voltage regulator (LDO); The 22-reset unit; 23-microprocessor (CORTEX-M3); The 24-storage unit; The 25-reserve battery; The 3-human-computer interface module; The 31-LCD screen; The 32-push-button unit; 321-left and right directions key; The 322-up and down arrow keys; The 323-setting key; The 324-return key; 33-LED electric current rod; The 4-communication module.
Embodiment
Below in conjunction with description of drawings and embodiment the utility model is further specified.
As Fig. 1, Fig. 2, shown in Figure 3, a kind of three-phase digital intelligent electric meter comprises input/output module 1, minimum systematic module 2, human-computer interface module 3 and communication module 4; Described input/output module 1, human-computer interface module 3 and communication module 4 are connected with described minimum systematic module 1 respectively; Described minimum systematic module 2 comprises power module 21, reset unit 22, microprocessor (CORTEX-M3) 23 and storage unit 24; Described input/output module 1 comprises digital quantity input module (DI) 11, digital quantity output module (DO) 12, analog quantity load module (AI) 13 and analog output module (AO) 14; Described human-computer interface module 3 comprise real-time demonstration electric power networks status information lcd screen 31, check and be provided with the push-button unit 32 of three-phase digital intelligent electric meter operational factor and show the LED electric current rod 33 of electric power networks size of current in real time.
Operating voltage (the V of STM32
DD) be 2.0--3.6V, this intelligent electric meter microprocessor (CORTEX-M3) 23 adopts the 3.3V DC power supply.Power quality is playing crucial effects aspect the safety of data communication and the quality, in case the tie line that the fault because of electric system causes and the damage of communication apparatus occur, electric power netting safe running is caused great harm.Therefore, power module 21 of the present utility model is provided with lightning protection circuit 211 and Switching Power Supply 212, outside 220V or 110V alternating current produce the 5V DC voltage that two-way is isolated after described lightning protection circuit 211 and Switching Power Supply 212, one the tunnel is described communication module 4 power supplies, another road 5V power supply produces er two-way DC voltage through DC/DC converter 213, low pressure difference linear voltage regulator (LDO) 214 respectively, is respectively 24V and 3.3V; 3.3V DC voltage is analog quantity load module (AI) 11, microprocessor 23, memory cell 24, lcd screen 31, LED electric current rod 33 and push-button unit 32 power supplies; The 24V DC voltage is digital quantity input module (DI) 11 power supplies.Three-phase digital intelligent electric meter of the present utility model also is provided with reserve battery 25 simultaneously, and described reserve battery 25 is connected with described communication module 4, DC/DC converter 213 and low pressure difference linear voltage regulator 214 respectively; As primary power V
DDDuring power down, by reserve battery 25(V
BAT) for real-time clock (RTC) and back-up registers provide power supply, to guarantee under electrical network badly damaged situation, continuing communication.This not only makes electrical network more safe and reliable, and reduces maintenance cost and staff's workload.
As Fig. 2, Fig. 4, Fig. 5, Fig. 6 and shown in Figure 7, described input/output module 1 comprises digital quantity input module 11, digital quantity output module 12, analog quantity load module 13 and analog output module 14; Described digital quantity input module 11 comprises photoelectricity coupled circuit 111, filtering de-twitter circuit 112, lightning protection buffer circuit (TVS pipe) 113, is used to detect the on off state of power equipment; Described digital quantity output module 12 comprises buffer circuit 121 and driving circuit 122, is used for being connected with the repeat circuit of electric power networks, and the real-time guard electric power networks; Described analog quantity load module 13 comprises voltage/current mutual inductor 131, filtering circuit 132, gain circuitry 133, A/D sample circuit 134, according to sampled digital signal, calculates the status information of electric power networks; Described analog output module 14 comprises buffer circuit 141, drives amplifying circuit 142, signal processing circuit 143, is used to export 4--20mA electric current or 0--5V voltage, realizes transmitter functions.
In the middle of the course of work, the digital quantity input signal detects the on off state of power equipment by lightning protection buffer circuit (TVS pipe) 113, photoelectricity coupled circuit 111 and filtering de-twitter circuit 112; The digital quantity output signal links to each other with the electric power networks repeat circuit through buffer circuit 121 and driving circuit 122, and electric power networks is carried out real-time guard; The analog quantity input comprises the voltage and current signal, respectively through voltage/current mutual inductor 131, filtering circuit 132, gain circuitry 133, A/D sample circuit 134, according to sampled digital signal, adopts computed in software, draws the status information of electric power networks; Analog quantity output signals adopts PWM(pulse-length modulation) technology, through magnetic buffer circuit 141, driving amplifying circuit 142, signal processing circuit 143, output 4--20mA electric current or 0--5V voltage, realize transmitter functions, the user can be configured according to the actual requirements, draws the status information of electric power networks.
As shown in Figure 2, described communication module 4 adopts the RS485 communication module, realize that microprocessor 23 and other hardware modules, equipment and system carry out exchanges data, and the Modbus-RTU communication protocol of the standard of employing realization equipment is communicated by letter with the networking of system with system, system with equipment, equipment.Favorable compatibility is easy to networking, can realize the reliable communicating of multinode, long distance, the convenient intelligent distribution system that inserts, realize the function of remote measurement, remote signalling, remote control, remote regulating " four is distant ", host computer can read the measurement data at each intelligent electric meter node place in a distant place, revise parameter, Long-distance Control realizes the purpose that the consumer Centralized Monitoring is effectively managed.Can also utilize the Modbus-RTU communications protocol to realize realizing by communication interface under the charged situation function of online upgrading, under the situation of the operation power that do not destory the scene, carry out maintenance upgrade, more economical safer.
In three-phase digital intelligent electric meter of the present utility model, reset unit 22 is mainly used in the button reset function of user when finishing the operation of system's power-up initializing and system, and the reset mode of Cortex-M3 kernel comprises system reset, powers on/and power-off reset and backup zone reset three kinds.
System reset will reset reseting mark in clock-control register (CSR) and all registers the register of backup in the zone.Low level (external reset), window house dog counting termination (WWDG resets), independent house dog counting termination (IWDG resets), software reset's (SW resets) and low-power consumption management on the NRST pin (asynchronous multiple pin) reset and can produce system reset, confirm reset source by checking the reset mode zone bit.
Powering on/power-off reset (POR/PDR resets) and returning from standby mode to produce power reset, and reset source finally acts on reseting pin, and keeps low level in reseting procedure.
The backup zone has two special resetting, and they are influence backup zone only.The backup zone resets and can produce by the backup area domain controller is set, and also can be powered on by working power and reserve battery and cause the backup zone and reset.
In three-phase digital intelligent electric meter of the present utility model, described storage unit 24 comprises EEPROM (Electrically Erasable Programmable Read Only Memo) (EEPROM) and ferroelectric memory (FRAM); What described ferroelectric memory was used to store the three-phase digital intelligent electric meter is provided with parameter and calibration parameter, and these parameters are carried out the two-region of primary area and backup area and preserved; Simultaneously storage unit 24 has realized the fault self-checking function on software, in service the two-region data is carried out verification and verification, and whether decision data is correct, lose or destroyed as data, then point out mistake, import default parameters and recover initial setting up, improved the intelligent electric meter reliability of operation greatly.
As Fig. 2, Fig. 8, shown in Figure 9, described human-computer interface module 3 comprise real-time demonstration electric power networks status information lcd screen 31, check and be provided with the push-button unit 32 of three-phase digital intelligent electric meter operational factor and show the LED electric current rod 33 of electric power networks size of current in real time.Described human-computer interface module 3 is taked modularized design method, and lcd screen 31, LED electric current rod 33, push-button unit 32 all are modular structures independently, and the change of module itself does not influence other modules.
Described lcd screen 31 shows parameter setting, the quality of power supply, measurement inquiry, parameter query, device maintenance and the logout of electric power networks in real time; Wherein conventional electric parameter comprises three-phase current and neutral current Ia, Ib, Ic, In, phase voltage and line voltage U a, Ub, Uc, Un, Uab, Ubc, Uca, frequency F, power factor PFa, PFb, PFc, PF, active power and reactive power Pa, Pb, Pc, P, Qa, Qb, Qc, Q, applied power Sa, Sb, Sc, S, active electrical degree Wp, idle electric degree Wq; Logout comprise power down, the phase failure, decompression, cutout, electric current and voltage asymmetric/imbalance, overvoltage, owe status informations such as phase, mains by harmonics.
The menu that described lcd screen 31 shows is taked the tree design, not only adapts to different system requirements, and the page itself also is independently individual, not coupling mutually, in addition, the font and the size of lcd screen 31 type matrixes can be selected, and support Chinese and English subtitles one key to switch.And adopt hierarchical approaches between menu and the menu, and a plurality of submenus can be arranged below the menu, the afterbody menu also can be referred to as the page, and the user shows or parameter is set.The menu and the page be correspondence function independently all, the respectively corresponding function of each menu or the page, and this meets Object Oriented method.The page of identical function may use identical template, for example confirms the page, checks the page etc., the inherited characteristics of the characteristic conforms Object-Oriented Design of this template.
In addition, queue structure's management is adopted in the management of tree type menu, and one-level menu, second-level menu, three-stage menu and the current set of menu or the page of current location preserved in formation.If return the parent menu, queue length reduces; If enter submenu, then the menu that will enter or the page add the formation end to.
As shown in figure 10, described push-button unit 32 comprises left and right directions key 321, up and down arrow keys 322, setting key 323 and 324 4 buttons of return key, and button is taked to disappear and trembled mode of operation, supports long by operation.Push-button unit triggering button enters parameter pattern is set, and carries out checking and being provided with of operational factor by button, and its function declaration is as follows:
Left and right directions key 321, expression page turning, or cursor move left and right;
Up and down arrow keys 322, the expression cursor up down moves, or revises numeral when adjusting;
Setting key 323 can enter master menu, or each submenu, uses when revising parameter or confirming modification, or withdraws from backlight mode;
Return key 324 can return higher level's page or cancellation is revised.
Measuring the interface, pressing setting key 323 can switching display content, but presses return key 324 return measurement interfaces, and master menu shows as shown in figure 11.Cursor can be moved to corresponding submenu by left and right directions key 321 or up and down arrow keys 322, can enter submenu by setting key 323, pressing left and right directions key 321 can switching display content, as shown in figure 12.
As shown in figure 13, described LED electric current rod 33 is used for showing in real time the size of electric power networks electric current, comprises 13 green lights, 4 amber lights and 3 red lights; When the real-time current of equipment under test greater than zero and when being less than or equal to the rated current of equipment under test, LED electric current rod 33 gives a green light; When the real-time current of equipment under test greater than the rated current of equipment under test and when being less than or equal to the rated current of 1.2 times of equipment under tests, LED electric current rod 33 gives a green light and the lamp of two kinds of colors of amber light; When the real-time current of equipment under test during greater than the rated current of 1.2 times of equipment under tests, the lamp of LED electric current rod 33 green, yellow, red three kinds of colors is bright entirely; The quantity of bright lamp is determined by following formula:
y=0,?I=0;
Y=[13*I/In] (rounding), 0＜I＜=In;
Y=[13+ (4*I/ (1.2*In))] (rounding), In＜I＜=1.2*In;
y=20,?I>1.2*In;
Wherein, y is the quantity of bright lamp, and I is the real-time current of equipment under test, and In is the rated current of equipment under test.
During measurement, the quantity of bright lamp and color can demonstrate the size of electric current in real time, and be intuitive and reliable, the accuracy class height.Certainly, the color of lamp also can adopt other color, and the quantity of lamp also can adjust as required again.
The process type programmed method is generally adopted in the liquid crystal interface design of present intelligent electric meter, can not effectively distinguish between the page and the page, the code transplantability is poor, and extendability and compatibility all are difficult to meet the demands, what's new often needs very big workload, and often introduces new problem.
Three-phase digital intelligent electric meter of the present utility model adopts the thought of hierarchical design and Object-Oriented Design aspect software systems, calling between the module adopted unidirectional method of calling, does not have that module is two-way to be called, and reduces the coupling between the module.Object Oriented method is with the actual composition and classification of module according to hardware, and same object provides the interface of standard, increases the portability and the inheritability of software.Wherein, three-phase digital intelligent electric meter liquid crystal interface of the present utility model adopts embedded lattice lcd tree type menu design, use for reference design idea of oriented object, modularization and maintainability all have very large raising, effectively the efficient of the embedded demonstration that improves.Modularization, standardization and the Normalized Design of three-phase digital intelligent electric meter software systems of the present utility model reduce redundant code, improve the maintainability of software systems.
As shown in figure 14, than existing other ammeters, three-phase digital intelligent electric meter of the present utility model is not only more safe and reliable, and running status is good, and is compatible strong, can monitor in real time supply network, also possesses following advantage:
Metering method: adopt A/D sampling and software algorithm,, make things convenient for the function expansion by adopting design idea of oriented object;
Structure: the software modularity design, hardware plug-in structure is expanded flexible;
Electric current shows: LED electric current rod shows size of current in real time, and the accuracy class height is intuitive and reliable;
Host-host protocol: unified host-host protocol (Modbus--RTU), the networked communication of realization equipment and equipment, equipment and system, system and system;
Liquid crystal display: support Chinese and English subtitles one key to switch, the storage of type matrix double copies, reliability is very high.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (10)
1. a three-phase digital intelligent electric meter is characterized in that: comprise input/output module, minimum systematic module, human-computer interface module and communication module; Described input/output module, human-computer interface module and communication module are connected with described minimum systematic module respectively; Described minimum systematic module comprises power module, reset unit, microprocessor and storage unit; Described power module is provided with lightning protection circuit and Switching Power Supply, the external communication electricity produces the 5V DC voltage that two-way is isolated after described lightning protection circuit and Switching Power Supply, one the tunnel is described communication module power supply, and another road is input/output module, microprocessor, storage unit and human-computer interface module power supply.
2. three-phase digital intelligent electric meter according to claim 1 is characterized in that: described input/output module comprises digital quantity input module, digital quantity output module, analog quantity load module and analog output module; Described digital quantity input module comprises photoelectricity coupled circuit, filtering de-twitter circuit, lightning protection buffer circuit, is used to detect the on off state of power equipment; Described digital quantity output module comprises buffer circuit and driving circuit, is used for being connected with the repeat circuit of electric power networks, and the real-time guard electric power networks; Described analog quantity load module comprises voltage/current mutual inductor, filtering circuit, gain circuitry, A/D sample circuit, according to sampled digital signal, calculates the status information of electric power networks; Described analog output module comprises the magnetic buffer circuit, drives amplifying circuit, signal processing circuit, is used to export 4--20mA electric current or 0--5V voltage, realizes transmitter functions.
3. three-phase digital intelligent electric meter according to claim 2 is characterized in that: described power module also is provided with DC/DC converter and low pressure difference linear voltage regulator; It is the two-way DC voltage of 24V and 3.3V that described another road 5V DC voltage produces magnitude of voltage through DC/DC converter, low pressure difference linear voltage regulator respectively; The DC voltage of described 24V is described digital quantity input module power supply, and described 3.3V DC voltage is described microprocessor, storage unit, analog quantity load module and human-computer interface module power supply.
4. three-phase digital intelligent electric meter according to claim 3 is characterized in that: described communication module is the RS485 communication module of employing standard Modbus-RTU communication protocol.
5. three-phase digital intelligent electric meter according to claim 4 is characterized in that: described storage unit comprises EEPROM (Electrically Erasable Programmable Read Only Memo) and ferroelectric memory; What described ferroelectric memory was used to store the three-phase digital intelligent electric meter is provided with parameter and calibration parameter.
6. according to the described three-phase digital intelligent electric meter of arbitrary claim in the claim 1 to 5, it is characterized in that: described human-computer interface module comprise real-time demonstration electric power networks status information lcd screen, check and be provided with the push-button unit of three-phase digital intelligent electric meter operational factor and show the LED electric current rod of electric power networks size of current in real time.
7. three-phase digital intelligent electric meter according to claim 6, it is characterized in that: described lcd screen shows parameter setting, the quality of power supply, measurement inquiry, parameter query, device maintenance and the logout of electric power networks in real time, and shown menu is taked the tree design.
8. three-phase digital intelligent electric meter according to claim 6 is characterized in that: described push-button unit comprises left and right directions key, up and down arrow keys, setting key and four buttons of return key.
9. three-phase digital intelligent electric meter according to claim 6 is characterized in that: described LED electric current rod comprises a plurality of LED lamps that are arranged in order, and the real-time current of equipment under test directly determines bright lamp quantity:
When the real-time current of equipment under test greater than zero and when being less than or equal to the rated current of equipment under test, bright lamp quantity is y=[x1*I/In];
When the real-time current of equipment under test greater than the rated current of equipment under test and when being less than or equal to the rated current of 1.2 times of equipment under tests, bright lamp quantity is y=[x1+ (x2*I/ (1.2*In))];
When the real-time current of equipment under test during greater than the rated current of 1.2 times of equipment under tests, bright lamp quantity is y=x1+x2+x3;
Wherein, y is the quantity of bright lamp, and x1 is the quantity of first kind of color LED lamp, and x2 is the quantity of second kind of color LED lamp, and x3 is the quantity of color LED lamp in the 3rd, and I is the real-time current of equipment under test, and In is the rated current of equipment under test.
10. according to the described three-phase digital intelligent electric meter of arbitrary claim in the claim 1 to 5, it is characterized in that: described minimum systematic module also is provided with reserve battery, described reserve battery is connected with described communication module, DC/DC converter and low pressure difference linear voltage regulator respectively, and described reserve battery is this three-phase digital intelligent electric meter power supply when the power down of external communication electricity.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018552A (en) * | 2012-12-14 | 2013-04-03 | 深圳职业技术学院 | Three-phase digital type intelligent electricity meter |
| CN105096465A (en) * | 2014-11-24 | 2015-11-25 | 芜湖蓝宙电子科技有限公司 | Design method for electric energy metering device with unsafe load recognition function |
| CN108594002A (en) * | 2018-06-19 | 2018-09-28 | 湖南银河电气有限公司 | Current sensor |
| CN109116106A (en) * | 2018-10-31 | 2019-01-01 | 江苏骏龙光电科技股份有限公司 | A kind of intelligent electric meter for smart grid |
-
2012
- 2012-12-14 CN CN 201220691761 patent/CN203101506U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018552A (en) * | 2012-12-14 | 2013-04-03 | 深圳职业技术学院 | Three-phase digital type intelligent electricity meter |
| CN105096465A (en) * | 2014-11-24 | 2015-11-25 | 芜湖蓝宙电子科技有限公司 | Design method for electric energy metering device with unsafe load recognition function |
| CN108594002A (en) * | 2018-06-19 | 2018-09-28 | 湖南银河电气有限公司 | Current sensor |
| CN109116106A (en) * | 2018-10-31 | 2019-01-01 | 江苏骏龙光电科技股份有限公司 | A kind of intelligent electric meter for smart grid |
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