CN206505111U - A kind of contactless circuit of uncapping of intelligent electric energy meter - Google Patents
A kind of contactless circuit of uncapping of intelligent electric energy meter Download PDFInfo
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- CN206505111U CN206505111U CN201720062888.0U CN201720062888U CN206505111U CN 206505111 U CN206505111 U CN 206505111U CN 201720062888 U CN201720062888 U CN 201720062888U CN 206505111 U CN206505111 U CN 206505111U
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- field detection
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Abstract
The utility model discloses a kind of contactless circuit of uncapping of intelligent electric energy meter, including electric energy metering box, magnetic sheet and magnetic field detection circuit, the magnetic field detection circuit includes structure identical the first magnetic field detection circuit and the second magnetic field detection circuit, magnetic sheet is installed on the depression bar, first magnetic field detection circuit is installed on the watchcase base immediately below the depression bar, the second magnetic field detection circuit is installed in the first magnetic field detection circuit side, 5 10mT magnetic field intensity is produced between the first magnetic field detection circuit and the magnetic sheet, 5 mT magnetic field intensity is generated less than between the second magnetic field detection circuit and the magnetic sheet.The utility model coordinates small-sized magnetic sheet by using common hall device, realize contactless circuit design of uncapping, design is very simple, big change is not needed substantially to former meter casing structure, device used is general-purpose device, very convenient high-volume buying and production, and realize very simple and reliable.
Description
Technical field
The utility model is related to a kind of detection circuit, specifically a kind of contactless circuit of uncapping of intelligent electric energy meter.
Background technology
As country carries forward vigorously to intelligent grid, the intelligent electric meter for being currently installed in scene is existing more than 400,000,000, intelligence
Energy ammeter has accurate measurement, and low current measuring accuracy is high, communication interactive function, the function such as multinomial event recording function.But mesh
Preceding stealing electricity phenomenon still generally existing, stealing processing is easy to observe and collected evidence outside meter, if but being done surreptitiously inside meter
Electric treatment, such as：Voltage circuit sample resistance or modification current loop sample resistance are changed, is difficult observation from meter outside, only
Meter can be changed, is analyzed after pulling down.Certain risk so can be carried out to analytic band, have erroneous judgement possible, if can accurately know meter
Improper record of uncapping was produced in operation, can be carried out great aucillary document to stealing analytic band, can be greatly improved stealing thing
The success rate that part is investigated and prosecuted.But there is a certain proportion of misdescription record in the mechanical record of uncapping that current intelligent electric energy meter is used, significantly
Reduce the confidence level of this logout.
Utility model content
Technical problem to be solved in the utility model is to overcome the shortcoming of prior art there is provided a kind of intelligent electric energy meter
Contactless circuit of uncapping, coordinates small-sized magnetic sheet by using common hall device, realizes contactless circuit design of uncapping,
Effectively the former intelligent electric energy meter of solution, which is mechanically uncapped, detects shake, the problem of producing error detection.
In order to solve the above technical problems, the utility model provides a kind of contactless circuit of uncapping of intelligent electric energy meter, bag
Electric energy metering box, magnetic sheet and magnetic field detection circuit are included, the electric energy metering box is included on watchcase on lid and watchcase base, the watchcase
Sealed between lid and watchcase base using mechanical pressure rod structure, depression bar, the magnetic field inspection are covered with the watchcase
Slowdown monitoring circuit includes structure identical the first magnetic field detection circuit and the second magnetic field detection circuit, and magnetic sheet is installed on the depression bar,
First magnetic field detection circuit is installed on the watchcase base immediately below the depression bar, installed in the first magnetic field detection circuit side
Second magnetic field detection circuit, produces 5-10mT magnetic field intensity between the first magnetic field detection circuit and the magnetic sheet, described
5 mT magnetic field intensity is generated less than between second magnetic field detection circuit and the magnetic sheet.
The technical scheme that the utility model is further limited is：The contactless circuit of uncapping of foregoing intelligent electric energy meter, institute
The detection unit for stating the first magnetic field detection circuit or the second magnetic field detection circuit uses three pin magnetic field detection chips, the three pin magnetic
The VDD pins of field detection chip are connected with processor VDD pins, and are grounded provided with branch road by electric capacity C5；Three pin magnetic field detections
The OUT pins of chip are connected by resistance R4 with processor CHK pins, the GND pin ground connection of the three pin magnetic field detection chip.
The contactless circuit of uncapping of foregoing intelligent electric energy meter, the diameter of the magnetic sheet is identical with the diameter of depression bar；It is described
Three pin magnetic field detection chips are HAL95A or HAL49E Hall elements.
The beneficial effects of the utility model are：The utility model coordinates small-sized magnetic sheet by using common hall device,
Contactless circuit design of uncapping is realized, design is very simple, do not need big change substantially to former meter casing structure, it is used
Device is general-purpose device, very convenient high-volume buying and production, and realizes very simple and reliable, effective former intelligent electricity of solution
Energy table, which is mechanically uncapped, detects shake, the problem of producing error detection.
Brief description of the drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the utility model magnetic field detection circuit diagram.
Embodiment
Embodiment 1
The present embodiment provides a kind of contactless circuit of uncapping of intelligent electric energy meter, structure as depicted in figs. 1 and 2, including electricity
Energy electricity box, magnetic sheet and magnetic field detection circuit, electric energy metering box include lid and watchcase bottom on lid 5 and watchcase base 6 on watchcase, watchcase
Sealed between seat using mechanical pressure rod structure, depression bar 1 is covered with watchcase, it is identical that magnetic field detection circuit includes structure
The first magnetic field detection circuit 3 and the second magnetic field detection circuit 4, magnetic sheet 2 is installed on depression bar, the watchcase base immediately below depression bar
The first magnetic field detection circuit of upper installation, the second magnetic field detection circuit, the inspection of the first magnetic field are installed in the first magnetic field detection circuit side
5-10mT magnetic field intensity is produced between slowdown monitoring circuit and magnetic sheet, generates less than 5 mT's between the second magnetic field detection circuit and magnetic sheet
Magnetic field intensity.
The first magnetic field detection circuit of the present embodiment or the detection unit of the second magnetic field detection circuit are examined using three pin magnetic fields
Chip is surveyed, the VDD pins of three pin magnetic field detection chips are connected with processor VDD pins, and are grounded provided with branch road by electric capacity C5；
The OUT pins of three pin magnetic field detection chips are connected by resistance R4 with processor CHK pins, the GND of three pin magnetic field detection chips
Pin is grounded；In magnetic field detection circuit, 3 pin HAL49E Hall elements of market high volume applications have been used to be examined as magnetic field
Chip is surveyed, chip sensitivity selection 5-10mT values, circuit is very simple, convenient production and test.
The electric energy metering box of the present embodiment is still using former mechanical depression bar, the difference is that small magnetic is fixedly mounted on depression bar
Piece, magnetic sheet size is suitable with depression bar diameter, and magnetic sheet to underface the first magnetic field detection circuit produces 5 ~ 10mT magnetic field intensity, adjusts
Whole side the second magnetic field detection circuit makes magnetic field intensity at the second magnetic field detection circuit be less than 5mT apart from the distance of depression bar magnetic sheet,
The magnetic field detection chip of the same sensitive intensity of selection, when lid normal mounting on watchcase, the first magnetic field detection electric circuit inspection to magnetic
Exist, and the second magnetic field detection electric circuit inspection is less than can now confirm it is closing lid state.When upper lid is opened, the first magnetic field
Detection circuit and the second magnetic field detection circuit can't detect magnetic field, now it is believed that uncap event, record of uncapping.Adopt
It can effectively be prevented from using magnetic interference with this scheme, when there is strong magnetic outside, due to the first magnetic field detection circuit and the second magnetic field
Circuit is detected apart from close, the distance of two detection circuits is compared with shell dimension, it is believed that substantially in same point, the first magnetic
Field detection circuit and the second magnetic field detection circuit have detected magnetic field, and now meter, which may determine that, there occurs magnetic disturbance event,
Do magnetic disturbance logout.
Above example is only explanation technological thought of the present utility model, it is impossible to limit protection model of the present utility model with this
Enclose, it is every according to the utility model proposes technological thought, any change done on the basis of technical scheme each falls within this reality
Within the scope of novel protected.
Claims (4)
1. a kind of contactless circuit of uncapping of intelligent electric energy meter, including electric energy metering box, magnetic sheet and magnetic field detection circuit, the electricity
Energy electricity box include using mechanical pressure rod structure to carry out between lid and watchcase base on lid and watchcase base, the watchcase on watchcase
Sealing, is covered with depression bar on the watchcase, the magnetic field detection circuit include structure identical the first magnetic field detection circuit and
Second magnetic field detection circuit, it is characterised in that：Install and pacify on the watchcase base immediately below magnetic sheet, the depression bar on the depression bar
The first magnetic field detection circuit is filled, the second magnetic field detection circuit, first magnetic are installed in the first magnetic field detection circuit side
Produce 5-10mT magnetic field intensity between detection circuit and the magnetic sheet, the second magnetic field detection circuit and the magnetic sheet it
Between generate less than 5 mT magnetic field intensity.
2. the contactless circuit of uncapping of intelligent electric energy meter according to claim 1, it is characterised in that：The first magnetic field inspection
The detection unit of slowdown monitoring circuit or the second magnetic field detection circuit uses three pin magnetic field detection chips, the three pin magnetic field detection chip
VDD pins are connected with processor VDD pins, and are grounded provided with branch road by electric capacity C5；The OUT pins of three pin magnetic field detection chips
It is connected by resistance R4 with processor CHK pins, the GND pin ground connection of the three pin magnetic field detection chip.
3. the contactless circuit of uncapping of intelligent electric energy meter according to claim 1, it is characterised in that：The diameter of the magnetic sheet
It is identical with the diameter of depression bar.
4. the contactless circuit of uncapping of intelligent electric energy meter according to claim 2, it is characterised in that：The three pin magnetic field inspection
Survey chip is HAL95A or HAL49E Hall elements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720062888.0U CN206505111U (en) | 2017-01-19 | 2017-01-19 | A kind of contactless circuit of uncapping of intelligent electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720062888.0U CN206505111U (en) | 2017-01-19 | 2017-01-19 | A kind of contactless circuit of uncapping of intelligent electric energy meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206505111U true CN206505111U (en) | 2017-09-19 |
Family
ID=59837237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720062888.0U Active CN206505111U (en) | 2017-01-19 | 2017-01-19 | A kind of contactless circuit of uncapping of intelligent electric energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206505111U (en) |
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2017
- 2017-01-19 CN CN201720062888.0U patent/CN206505111U/en active Active
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