CN203249954U - Electric energy meter with function of detecting alternating magnetic fields and constant magnetic fields - Google Patents
Electric energy meter with function of detecting alternating magnetic fields and constant magnetic fields Download PDFInfo
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- CN203249954U CN203249954U CN 201320143589 CN201320143589U CN203249954U CN 203249954 U CN203249954 U CN 203249954U CN 201320143589 CN201320143589 CN 201320143589 CN 201320143589 U CN201320143589 U CN 201320143589U CN 203249954 U CN203249954 U CN 203249954U
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Abstract
The utility model provides an electric energy meter with function of detecting alternating magnetic fields and constant magnetic fields. The electric energy meter includes an electric-power sampling terminal, a working power supply and a processing chip; the electric energy meter is connected between a power lead of a power grid and a load of a user via the electric-power sampling terminal; the power supply is connected with the processing chip to supply an operating voltage for the processing chip, and the electric-power sampling terminal acquires electric-power sampling signals and transmits the signals to the processing chip; and a triaxial magnetic sensor which is connected with the power supply and the processing chip is further included, and the triaxial magnetic sensor obtains an operating voltage from the power supply, converts obtained magnetic field variables into data signals, and transmits the data signals to the processing chip. The triaxial magnetic sensor is employed, and there is no need for the detected triaxial magnetic sensor to face an axis, so detection can be carried out when the sensor is placed in any direction; the sensor is a high-sensitivity magnetic sensor which can detect small magnetic elements; and by detecting the triaxial magnetic sensor, alternating magnetic fields and constant magnetic fields can be detected well.
Description
Technical field
The utility model relates to the electric system electrical measuring device, more particular words it, the utility model embodiment relates to a kind of by to the detection of device external alternation or stationary magnetic field intensity, in addition the effective electric energy meter equipment of electricity theft prevention.
Background technology
Electric energy meter calculates with kilowatt hour electrical network user's power consumption, and electric power data is gathered.By the data acquisition analysis, the electric power facility construction of electrical network is improved.Yet, in the normal operation of electric energy meter, the problem that often runs into is the interference that is subject to outside sources his-and-hers watches meter precision, overcome problems although install additional element (such as iron ring or radome etc.) additional by his-and-hers watches meter outside in the prior art, but this solution after all effect is limited, (for example high temperature, high-intensity magnetic field) still can't avoid the generation of problem under some specific environment.For example, well known to those skilled in the art, the current transformer that often uses in the conventional electrical formula electric energy meter is very responsive to high-intensity magnetic field, and high-intensity magnetic field can affect the running parameter of current transformer, again for example by utilizing strong magnet adhesive ammeter relay, cause the work loop to disconnect, thereby can't carry out correct collection to electrical network user's power consumption, this also is current a kind of more common electricity filching means.
The utility model content
The technical solution of the utility model can solve above technological deficiency, overcome by a kind of electrical measuring device (being preferably a kind of electric energy meter) with mensuration changes of magnetic field, utilize 3-axis magnetic sensor, and do not require tested 3-axis magnetic sensor aiming axis, therefore place sensor in either direction, can test.This sensor is a high sensitivity Magnetic Sensor, can survey little magnetic element, by 3-axis magnetic sensor is tested, and can fine mensuration alternation and stationary magnetic field.
Experimental result shows, obtains satisfied application in intelligent electric meter is used.Because 3-axis magnetic sensor is exported x simultaneously, y, z axle magnetic field intensity is so can detect the locus in magnetic field.
Magnetic sensor is a kind of for detection of magnetic field and obtain the integrating device of field strength values.Magnetic sensor is measured the size in magnetic field for detection of the existence in magnetic field, determines whether the direction in magnetic field or size or the direction in mensuration magnetic field change.Magnetic sensor can be used for detecting static or such as the ferromagnetic object of the motions such as automobile, truck or train; Closing of door or breech lock is such as the aircraft cargo door; The position of an object is such as the button on the keyboard; Such as rotatablely moving of engine axis; The position of an object is such as valve shaft or mechanical arm; Perhaps be used for following the tracks of the application such as virtual reality and motion control.
Technical solutions of the utility model: have the electric energy meter that detects alternation and stationary magnetic field function, comprised the electric power sampling end, working power and process chip, wherein be arranged between electric network power line and the user load by the electric power sampling end, described power supply is connected in process chip and operating voltage is provided for it, described electric power sampling end obtains power sampling signal and is transferred to process chip, its improvements are: further be provided with 3-axis magnetic sensor, it is connected in described power supply and process chip, obtains operating voltage and the magnetic field variable that obtains is converted to digital signal to send to process chip by power supply.
In an embodiment who the utlity model has the electric energy meter that detects alternation and stationary magnetic field function, described 3-axis magnetic sensor comprises a sensor module and the ASIC assembly that is attached thereto, and described ASIC assembly further accesses process chip.
In an embodiment who the utlity model has the electric energy meter that detects alternation and stationary magnetic field function, described sensor module comprises the X-axis bridge type magnetic field sensor that obtains the X-direction sensitivity, the Y-axis bridge type magnetic field sensor of Y direction sensitivity, and the Z axis bridge type magnetic field sensor of Z-direction sensitivity, wherein X, Y, Z axis pairwise orthogonal.
Further, between described sensor module and the ASIC assembly be in addition optics or electricity coupling.
Further, described X-axis bridge type magnetic field sensor, Y-axis bridge type magnetic field sensor and Z axis bridge type magnetic field sensor are respectively the MTJ magnetic field sensor.
In an embodiment who the utlity model has the electric energy meter that detects alternation and stationary magnetic field function, further comprise an EEPROM storage medium that is connected in described process chip, be used for storage from the data of process chip.
In an embodiment who the utlity model has the electric energy meter that detects alternation and stationary magnetic field function, design described processor to obtain magnetic field strength date; And the error of described 3-axis magnetic sensor being carried out the collection of three-dimensional magnetic axis is returned benefit.
The beneficial effects of the utility model are apparent, and detection sensitivity was high, low in energy consumption after the utility model intelligent electric meter adopted this technology, good linearity, and wide dynamic range, good temp characteristic, antijamming capability is strong.
Description of drawings
Fig. 1 is the structural principle block diagram of the utility model electric energy meter.
Embodiment
With reference to Fig. 1, have the electric energy meter that detects alternation and stationary magnetic field function and comprised electric power sampling end 1, working power 2 and process chip, wherein be arranged between electric network power line and the user load by electric power sampling end 1, described power supply 2 is connected in process chip 3, described electric power sampling end 1 obtains power sampling signal voltage U and electric current I and is transferred to process chip 3, further comprise 3-axis magnetic sensor 4, it is connected in power supply 2 and process chip 3, obtains the 3.3V operating voltage and the magnetic field variable that obtains is converted to digital signal to send to process chip 3 by power supply 2.
Further, 3-axis magnetic sensor 4 specifically comprises a sensor module and the ASIC assembly that is attached thereto, and this ASIC assembly is electricity access process chip 3 further.
Wherein, sensor module comprises the X-axis bridge type magnetic field sensor that obtains the X-direction sensitivity, the Y-axis bridge type magnetic field sensor of Y direction sensitivity, and the Z axis bridge type magnetic field sensor of Z-direction sensitivity, wherein X, Y, Z axis pairwise orthogonal.
Further, between sensor module and the ASIC assembly be in addition optics or electricity coupling.
Further, described X-axis bridge type magnetic field sensor, Y-axis bridge type magnetic field sensor and Z axis bridge type magnetic field sensor are respectively the MTJ magnetic field sensor.
Specifically, have among the embodiment of the electric energy meter that detects alternation and stationary magnetic field function and further comprise an EEPROM storage medium that is connected in described process chip, be used for storage from the data of process chip.
In an embodiment who the utlity model has the electric energy meter that detects alternation and stationary magnetic field function, described magnetic field detection scope is 0 to 2.4 mT.
Claims (6)
1. has the electric energy meter that detects alternation and stationary magnetic field function, comprised the electric power sampling end, working power and process chip, wherein be arranged between electric network power line and the user load by the electric power sampling end, described power supply is connected in process chip and operating voltage is provided for it, described electric power sampling end obtains power sampling signal and is transferred to process chip, it is characterized in that: further be provided with 3-axis magnetic sensor, it is connected in described power supply and process chip, obtains operating voltage and the magnetic field variable that obtains is converted to digital signal to send to process chip by power supply.
2. according to claim 1 have an electric energy meter that detects alternation and stationary magnetic field function, and it is characterized in that: described 3-axis magnetic sensor comprises a sensor module and the ASIC assembly that is attached thereto, and described ASIC assembly further accesses process chip.
3. according to claim 2 have an electric energy meter that detects alternation and stationary magnetic field function, it is characterized in that: described sensor module comprises the X-axis bridge type magnetic field sensor that obtains the X-direction sensitivity, the Y-axis bridge type magnetic field sensor of Y direction sensitivity, and the Z axis bridge type magnetic field sensor of Z-direction sensitivity, wherein X, Y, Z axis pairwise orthogonal.
4. according to claim 2 have an electric energy meter that detects alternation and stationary magnetic field function, it is characterized in that: be that in addition optics or electricity are coupled between described sensor module and the ASIC assembly.
5. according to claim 3 have an electric energy meter that detects alternation and stationary magnetic field function, and it is characterized in that: described X-axis bridge type magnetic field sensor, Y-axis bridge type magnetic field sensor and Z axis bridge type magnetic field sensor are respectively the MTJ magnetic field sensor.
6. the electric energy meter with detection alternation and stationary magnetic field function according to claim 1 is characterized in that: further comprise an EEPROM storage medium that is connected in described process chip, be used for storage from the magnetic field detection data of process chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320143589 CN203249954U (en) | 2013-03-27 | 2013-03-27 | Electric energy meter with function of detecting alternating magnetic fields and constant magnetic fields |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320143589 CN203249954U (en) | 2013-03-27 | 2013-03-27 | Electric energy meter with function of detecting alternating magnetic fields and constant magnetic fields |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203249954U true CN203249954U (en) | 2013-10-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320143589 Expired - Fee Related CN203249954U (en) | 2013-03-27 | 2013-03-27 | Electric energy meter with function of detecting alternating magnetic fields and constant magnetic fields |
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| CN (1) | CN203249954U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108169552A (en) * | 2018-01-02 | 2018-06-15 | 华立科技股份有限公司 | Direct current energy meter and direct current energy metering device based on tunnel type magneto-resistor |
| CN109901092A (en) * | 2019-03-05 | 2019-06-18 | 国网重庆市电力公司电力科学研究院 | A kind of circuit design method for the detection of mutual inductor stationary magnetic field |
-
2013
- 2013-03-27 CN CN 201320143589 patent/CN203249954U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108169552A (en) * | 2018-01-02 | 2018-06-15 | 华立科技股份有限公司 | Direct current energy meter and direct current energy metering device based on tunnel type magneto-resistor |
| CN109901092A (en) * | 2019-03-05 | 2019-06-18 | 国网重庆市电力公司电力科学研究院 | A kind of circuit design method for the detection of mutual inductor stationary magnetic field |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131023 Termination date: 20200327 |
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| CF01 | Termination of patent right due to non-payment of annual fee |