CN203350307U - Antimagnetic device of intelligent electric-energy meter - Google Patents
Antimagnetic device of intelligent electric-energy meter Download PDFInfo
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- CN203350307U CN203350307U CN 201320293502 CN201320293502U CN203350307U CN 203350307 U CN203350307 U CN 203350307U CN 201320293502 CN201320293502 CN 201320293502 CN 201320293502 U CN201320293502 U CN 201320293502U CN 203350307 U CN203350307 U CN 203350307U
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- 230000005611 electricity Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 14
- 230000005389 magnetism Effects 0.000 description 9
- 239000007795 chemical reaction product Substances 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000005314 correlation function Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
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Abstract
The utility model discloses an antimagnetic device of an intelligent electric-energy meter, and relates to the antimagnetic device of an electricity meter. The device comprises an MCU which is served as a core control circuit. A metering circuit is connected with the MCU through an SPI bus. A power supply circuit supplies +12V and +5V direct-current power supplies for the electric-energy meter. A motor-type relay control circuit is connected with the IO pin of the MCU. A motor-type relay detection circuit is directly connected with the IO pin of the MCU. A magnetic-field interference detection circuit is in triangle connection with the AD end of the MCU. A storage circuit is connected with an I2C bus of the MCU. A key circuit is in triangle connection with the MCU through the IO end. An IC card interface circuit is connected with the MCU through an ISO7816 interface. The device aims at the interference of a constant magnetic field on the intelligent electric-energy meter and employs a relay of a motor drive type, and the interior of the relay is provided with a motor and a plastic gear apparatus, and the relay is served as a build-in load switch. An antimagnetic method of the intelligent electric-energy meter and the antimagnetic device of the intelligent electric-energy meter are not interfered by the magnetic field.
Description
Technical field
The utility model relates to the magnetism preventing device of ammeter, particularly relates to a kind of magnetism preventing device of intelligent electric energy meter.
Background technology
At present, intelligent electric energy meter is universal in China, but has found some problems in the process of using in reality, and wherein topmost problem is exactly the interference problem of stationary magnetic field to electric energy meter.
It is the built-in electric energy meter of on-load switch that present state net intelligent electric energy meter has more than 70%, and the intelligent electric energy meter in present market is all used magnetic latching relay as the built-in on-load switch of electric energy meter, when the external world is used 50mm*50mm*50mm magnetic force, for the permanent magnet more than 200mT, electric energy meter is applied to the stationary magnetic field interference, use the outage of can't normally operating a switch of the electric energy meter of magnetic latching relay, cause the illegal user of part to adopt this kind of illegal electricity consumption of section.
More domestic intelligent electric meter manufacturers increase the layer of metal shell outside magnetic latching relay in order to address the above problem, although do like this, can disturb by armoured magnetic field, and also bring a lot of new problems: (1) electric energy meter holistic cost significantly rises; (2) metal shielding can be led away relay protection and be held the magnetic field that the coil in relay produces, the operation voltage of relay significantly improves approximately 60% ~ 70%, increase the electric energy meter extra power consumption, and the large electric current of moment also can make the electric energy meter operating voltage descend in short-term, cause electric energy meter stability significantly to reduce; (3) because relay increases screening can, also can reduce the magnetic force of armature group, the confining force of magnetic latching relay, cause the state of relay easily to change; (4) between contact, pressure is mostly between 200g ~ 400g, and when pressure easily changes (5) high temperature, shell fragment and moving plate bow arm produce STRESS VARIATION, easily cause virtual connection; (6) due to limited space in intelligent electric meter, after the increase metal shell, the interior space of ammeter is more nervous, and the safe electrical appliance gap dwindles.(8) electric energy meter does not possess the magnetic field detection function, can not the recording magnetic field interference incident, can not be in time by the magnetic interference reporting events to main website.
Summary of the invention
The purpose of this utility model is to provide a kind of magnetism preventing device of intelligent electric energy meter, interference for stationary magnetic field to intelligent electric energy meter, use the motor-driven relay, inside is motor and plastic gear device, antimagnetic interference method and device as the intelligent electric energy meter of built-in on-load switch, be not subject to magnetic interference.
The purpose of this utility model is achieved through the following technical solutions:
A kind of magnetism preventing device of intelligent electric energy meter, described device comprises relay, motor and toothed gearing, also comprise the MCU core control circuit, power circuit, electric motor type control relay circuit, electric motor type relay test circuit, the magnetic interference testing circuit, memory circuit, safety certification circuit, IC-card interface circuit; Described relay inside is provided with motor and plastic gear device, has the relay test circuit; Relay contact pressure is formed by the spring structure setting, and contact force is between 450g ~ 600g; Described MCU is core control circuit, and MCU passes through I
2c bus and display circuit join, and metering circuit is connected by spi bus with MCU, power circuit be electric energy meter configuration+12V and+the 5V direct supply; The electric motor type control relay circuit is connected with the IO pin of MCU, and electric motor type relay test circuit directly is connected with the IO pin of MCU, and the magnetic interference testing circuit is connected with the AD end product of MCU, the I of memory circuit and MCU
2the C bus connects, and key circuit is connected by IO end product with MCU, and the safety certification circuit is connected by the ISO7816 interface with MCU, and the IC-card interface circuit is connected by the ISO7816 interface with MCU.
The magnetism preventing device of described a kind of intelligent electric energy meter, this device is made the built-in on-load switch of intelligent electric energy meter by the electric motor type relay.
The magnetism preventing device of described a kind of intelligent electric energy meter, this device electric motor type relay is made the built-in on-load switch of intelligent electric energy meter, comprises that VB is+the 12V power supply, and JAA directly is connected with the IO pin of MCU with JBB.
The magnetism preventing device of described a kind of intelligent electric energy meter, this device relay test circuit comprises that L1 is live wire output, N is zero line output.
The magnetism preventing device of described a kind of intelligent electric energy meter, the magnetic interference testing circuit in this device comprises that U1 is Hall element, the 1 pin VCC connection+5V power supply of U1,2 pin GND connect ground, and 3 pin OUT are Voltage-output.
Advantage of the present utility model and effect are:
1. relay uses motor to drive the actuating of relay, and inside is motor and plastic gear device, is not subject to magnetic interference;
2. relay does not use the metallic shield shell, reduces the electric energy meter cost;
3. drive current is little, during the actuating of relay, to electric energy meter electric source, disturbs little;
4. there is the relay test circuit, detect in real time that relay is operated a switch or "on" position;
5. motor drives relay contact pressure to be provided by spring, and contact force is between 450g ~ 600g, and contact connects reliable;
6. high temperature and low temperature environment spring remain pressure between contact, and contact connects reliable;
7. there is the magnetic interference testing circuit, but external magnetic field detected, disturb the recording magnetic field interference incident, and by the active report of event main website.
The accompanying drawing explanation
Fig. 1 is structured flowchart of the present utility model;
Fig. 2 is electric motor type relay drive circuit of the present utility model;
Fig. 3 is electric motor type relay test circuit of the present utility model;
Fig. 4 is magnetic interference testing circuit of the present utility model;
Fig. 5 is that the hall element output voltage that uses in the utility model is with the magnetic induction density change curve;
Fig. 6 is the program circuit that in the utility model, intelligent electric energy meter is operated a switch and cut off the power supply;
Fig. 7 is the program circuit of intelligent electric energy meter combined floodgate power transmission in the utility model.
Embodiment
Below in conjunction with embodiment, the utility model is elaborated.
The structured flowchart of the utility model device as shown in Figure 1.In figure, MCU is core control circuit of the present utility model, the functions such as the calculating of responsible intelligent electric energy meter and control; MCU passes through I
2the total line traffic control display circuit of C, display circuit is responsible for showing the demonstration human-computer interaction interface of electric energy meter; Metering circuit is connected by spi bus with MCU, is responsible for the electric energy metrical correlation function; Power circuit for provide+12V of electric energy meter and+the 5V direct supply; The electric motor type control relay circuit is connected with the IO pin of MCU, is responsible for drive motor formula relay; Electric motor type relay test circuit directly is connected with the IO pin of MCU, whether correctly is responsible for detecting relay status; The magnetic interference testing circuit is connected with the AD end product of MCU, is responsible for detecting electric energy meter and whether is subject to the stationary magnetic field interference; The I of memory circuit and MCU
2the C bus connects, and is responsible for correlation parameter and the service data of storage of electrical energy table; Key circuit is connected by IO end product with MCU, is responsible for the input information of electric energy meter; The safety certification circuit is connected by the ISO7816 interface with MCU, is responsible for the safety certification operation of electric energy meter; The IC-card interface circuit is connected by the ISO7816 interface with MCU, is responsible for the read-write operation of IC-card.
The utility model is used the electric motor type relay to make the built-in on-load switch of intelligent electric energy meter, and the driving circuit of electric motor type relay as shown in Figure 2.In Fig. 2, VB is+the 12V power supply that JAA directly is connected with the IO pin of MCU with JBB, when electric energy meter need to be carried out when outage of operating a switch, JAA becomes high level, and JBB becomes low level, triode V6, V8 cut-off, V7, V9 conducting, JA is+12V, JB is 0V, but JA, JB port direct-driving motor formula relay motor internal forward rotation drives contact separation, cut off power supply, successfully after the cut-out power supply, JAA, JBB pin become low level again; When electric energy meter need to be carried out the combined floodgate power transmission, JAA becomes low level, JBB becomes high level, triode V6, V8 conducting, V7, V9 cut-off, JA is 0V, JB is+12V, but JA, JB port direct-driving motor formula relay motor internal rotate backward, drive the closing of contact, restore electricity, the rear JAA that successfully restores electricity, JBB pin become low level again.
In order to prevent the relay misoperation work, whether the utility model is used the outage of relay test electric circuit inspection or power supply as shown in Figure 3 normal.In figure, L1 is live wire output, and N is zero line output, after relay is operated a switch outage, and the L1 no-voltage, optocoupler E10 cut-off, check point CHK_User is low level; After circuit breaker closes a floodgate and to restore electricity, L1 is the 50Hz sine wave, when L1 voltage during higher than the half-wave of N voltage, and optocoupler E10 conducting, check point CHK_User output frequency is the square-wave signal that the 50Hz dutycycle is 50%.Check point CHK_User directly is connected with the IO end product of MCU, and MCU judges that by detecting the CHK_User waveform whether relay status is correct.
The utility model is used electric circuit inspection electric energy meter surrounding magnetic field as shown in Figure 4.In figure, U1 is Hall element, the 1 pin VCC connection+5V power supply of U1, and 2 pin GND connect ground, and 3 pin OUT are Voltage-output.When electric energy meter is subject to magnetic interference, the voltage of check point Hell_Chk output is with change of magnetic field strength, output voltage with the magnetic induction density change curve as shown in Figure 5, MCU gathers voltage by AD converter, and calculating magnetic field intensity, after output voltage exceeds magnetic field and rationally encloses model, the inner magnetic field exception record that produces of electric energy meter, to record write storage circuit, by telecommunication circuit by reporting events to main website.
Embodiment:
In the utility model intelligent electric energy meter operate a switch outage program circuit as shown in Figure 6, below accompanying drawing explain the flow process of the outage program of operating a switch of intelligent electric energy meter:
In the utility model the program circuit of intelligent electric energy meter combined floodgate power transmission as shown in Figure 7, below accompanying drawing explain the flow process of the combined floodgate power transmission program of intelligent electric energy meter:
Step 701, it is high level that MCU controls JA, JB is low level, relay motor internal forward rotation, with the mechanical gear rotation of the inner plastic construction of machine relay, relay contact disconnects.Recovering JA, JB after success driving relay is low level state.
Step 702, MCU reads optocoupler E10 signal output waveform by the IO port.
Step 703, the judgement signal waveform, be continue low level signal mean to close a floodgate unsuccessfully if signal is frequency, performs step 704; Otherwise mean to close a floodgate successfully, finish to operate a switch control flow.
Step 704, MCU records the turkey of operating a switch, and attempts again operating a switch.
Claims (5)
1. the magnetism preventing device of an intelligent electric energy meter, it is characterized in that, described device comprises relay, motor and toothed gearing, also comprises the MCU core control circuit, power circuit, the electric motor type control relay circuit, electric motor type relay test circuit, magnetic interference testing circuit, memory circuit, the safety certification circuit, the IC-card interface circuit; Described relay inside is provided with motor and plastic gear device, has the relay test circuit; Relay contact pressure is formed by the spring structure setting, and contact force is between 450g ~ 600g; Described MCU is core control circuit, and MCU passes through I
2c bus and display circuit join, and metering circuit is connected by spi bus with MCU, power circuit be electric energy meter configuration+12V and+the 5V direct supply; The electric motor type control relay circuit is connected with the IO pin of MCU, and electric motor type relay test circuit directly is connected with the IO pin of MCU, and the magnetic interference testing circuit is connected with the AD end product of MCU, the I of memory circuit and MCU
2the C bus connects, and key circuit is connected by IO end product with MCU, and the safety certification circuit is connected by the ISO7816 interface with MCU, and the IC-card interface circuit is connected by the ISO7816 interface with MCU.
2. the magnetism preventing device of a kind of intelligent electric energy meter according to claim 1, is characterized in that, this device is made the built-in on-load switch of intelligent electric energy meter by the electric motor type relay.
3. the magnetism preventing device of a kind of intelligent electric energy meter according to claim 2, is characterized in that, this device electric motor type relay drive circuit comprises that VB is+the 12V power supply, and JAA directly is connected with the IO pin of MCU with JBB.
4. the magnetism preventing device of a kind of intelligent electric energy meter according to claim 1, is characterized in that, this device relay test circuit comprises that L1 is live wire output, and N is zero line output.
5. the magnetism preventing device of a kind of intelligent electric energy meter according to claim 1, is characterized in that, the magnetic interference testing circuit in this device comprises that U1 is Hall element, the 1 pin VCC connection+5V power supply of U1, and 2 pin GND connect ground, and 3 pin OUT are Voltage-output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320293502 CN203350307U (en) | 2013-05-27 | 2013-05-27 | Antimagnetic device of intelligent electric-energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320293502 CN203350307U (en) | 2013-05-27 | 2013-05-27 | Antimagnetic device of intelligent electric-energy meter |
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| Publication Number | Publication Date |
|---|---|
| CN203350307U true CN203350307U (en) | 2013-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320293502 Expired - Fee Related CN203350307U (en) | 2013-05-27 | 2013-05-27 | Antimagnetic device of intelligent electric-energy meter |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245810A (en) * | 2013-05-27 | 2013-08-14 | 沈阳时尚实业有限公司 | Anti-magnetic device and anti-magnetic method of intelligent electric energy meter |
| CN105259800A (en) * | 2015-09-14 | 2016-01-20 | 沈阳时尚实业有限公司 | Gesture-controlled intelligent meter liquid crystal display system |
-
2013
- 2013-05-27 CN CN 201320293502 patent/CN203350307U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245810A (en) * | 2013-05-27 | 2013-08-14 | 沈阳时尚实业有限公司 | Anti-magnetic device and anti-magnetic method of intelligent electric energy meter |
| CN103245810B (en) * | 2013-05-27 | 2015-09-30 | 沈阳时尚实业有限公司 | A kind of magnetism preventing device of intelligent electric energy meter and anti-magnetism method thereof |
| CN105259800A (en) * | 2015-09-14 | 2016-01-20 | 沈阳时尚实业有限公司 | Gesture-controlled intelligent meter liquid crystal display system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: Hunnan New Network street Shenyang city Liaoning province 110179 No. 8 Patentee after: NORTH SMART EQUIPMENT CO.,LTD. Address before: Xinluo Street Hunnan Development Zone in Shenyang City, Liaoning Province, No. 8 110179 Patentee before: SHENYANG FASHION ENTERPRISE Co.,Ltd. |
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| PP01 | Preservation of patent right |
Effective date of registration: 20191014 Granted publication date: 20131218 |
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| PP01 | Preservation of patent right | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20221014 Granted publication date: 20131218 |
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| PD01 | Discharge of preservation of patent | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20221014 Granted publication date: 20131218 |
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| PP01 | Preservation of patent right | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20230527 Granted publication date: 20131218 |
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| PD01 | Discharge of preservation of patent | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131218 |
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| CF01 | Termination of patent right due to non-payment of annual fee |