CN207248978U - Magneto-resistive current sensor - Google Patents
Magneto-resistive current sensor Download PDFInfo
- Publication number
- CN207248978U CN207248978U CN201721340890.6U CN201721340890U CN207248978U CN 207248978 U CN207248978 U CN 207248978U CN 201721340890 U CN201721340890 U CN 201721340890U CN 207248978 U CN207248978 U CN 207248978U
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- processing unit
- signal processing
- magneto
- signal
- bridge
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Abstract
The utility model provides a kind of magneto-resistive current sensor, including connected push-pull type favour stone magnetic resistance full-bridge and signal processing unit；The push-pull type favour stone magnetic resistance full-bridge is used to send the current signal of detection to the signal processing unit；The signal processing unit is used to be digitized processing to the current signal, and is transmitted by radio-cell.The utility model proposes magneto-resistive current sensor, its is simple and reasonable, reliable and stable, small.
Description
Technical field
It the utility model is related to sensor technical field, more particularly to magneto-resistive current sensor.
Background technology
At present, power network current voltage measurement in China's is with electromagnetic type current-voltage transformer or mutual with electronic current voltage
Sensor.
For example, the patent document that notification number is CN203707766U discloses electromagnetic transformer, including a ground terminal
The aluminum pipe being grounded is stretched out from the ground terminal with one, the electromagnetic transformer further includes one and is fixed on the ground terminal
Fixing piece and a plurality of earthing members for being fixed on the fixing piece, contact wherein the earthing member has with what the aluminum pipe contacted
Face.In fact, electromagnetic type current-voltage transformer is easily saturated, and the capacitance on the inductance and power grid of voltage transformer can give birth to
Resonance is produced, operation risk is big, and volume is big.
For another example the patent document that notification number is CN203324347U discloses a kind of electronic mutual inductor, including：Sensing
Head, collector and combining unit, the sensing head, is connected by shielded cable with the collector, is sent out to the collector
Send input signal；The collector, is connected with the combining unit by optical fiber, is installed on the ground of the electronic mutual inductor
Current potential side, the correction factor of the collector are adapted dynamically according to the property of the sensor；By sampling system to described defeated
Enter signal to be acquired to obtain digital signal, by the digital signal by optical fiber output to combining unit；The merging list
Member, is connected by optical fiber with the collector, and the digital signal to come to collector output merges processing, is converted into
Ethernet data, passes through optical fiber output by the Ethernet data.In fact, electronic current voltage mutual inductor volume is also big.
Utility model content
To solve above-mentioned technical problem, the utility model proposes a kind of magneto-resistive current sensor, its is simple and reasonable,
It is reliable and stable, small.
To achieve the above object, the utility model provides following technical solution：
A kind of magneto-resistive current sensor, including connected push-pull type favour stone magnetic resistance full-bridge and signal processing unit；
The push-pull type favour stone magnetic resistance full-bridge is used to send the current signal of detection to the signal processing unit；
The signal processing unit is used to be digitized the current signal processing, and is carried out by radio-cell
Send.
As a kind of embodiment, the push-pull type favour stone magnetic resistance full-bridge uses tunnel magneto resistance.
As a kind of embodiment, the push-pull type favour stone magnetic resistance full-bridge and the signal processing unit pass through epoxy
Resin-encapsulated one.
As a kind of embodiment, the radio-cell is built in the signal processing unit.
As a kind of embodiment, the radio-cell is placed outside the signal processing unit.
The beneficial effects of the utility model compared with the prior art lie in：
The utility model provides a kind of magneto-resistive current sensor, including push-pull type favour stone magnetic resistance full-bridge and signal processing
Unit, wherein, push-pull type favour stone magnetic resistance full-bridge is used to detect electric current；Then current signal is carried out by signal processing unit
Digitized processing, and be wirelessly transmitted.
Brief description of the drawings
Fig. 1 is the block diagram for the magneto-resistive current sensor that one embodiment of the utility model provides；
Fig. 2 is the block diagram for the magneto-resistive current sensor that another embodiment of the utility model provides；
Fig. 3 is the block diagram for the magneto-resistive current sensor that another embodiment of the utility model provides.
In figure：U1, push-pull type favour stone magnetic resistance full-bridge；U2, signal processing unit；U21, radio-cell.
Embodiment
Below in conjunction with attached drawing, and other technical characteristic above-mentioned to the utility model and advantage carry out clearly and completely
Description, it is clear that described embodiment is only the section Example of the utility model, rather than whole embodiments.
With reference to Fig. 1, a kind of magneto-resistive current sensor is present embodiments provided, including connected push-pull type favour stone magnetic resistance is complete
Bridge U1 and signal processing unit U2；Push-pull type favour stone magnetic resistance full-bridge U1 is used to send the current signal of detection to signal processing
Unit U2；Signal processing unit U2 is used to be digitized current signal processing, and is sent out by radio-cell U21
Send.
In the present embodiment, push-pull type favour stone magnetic resistance full-bridge U1 is used to detect electric current, then passes through signal processing unit U2
Processing is digitized to current signal, and is wirelessly transmitted.Generally speaking, its is simple and reasonable, steady
It is fixed reliable, small.In fact, producing magnetic field around the conductor to alive, magnetic field is by push-pull type favour stone magnetic resistance full-bridge U1
Detect, push-pull type favour stone magnetic resistance full-bridge U1 output signals.This signal magnitude is directly proportional to magnetic field size.Namely this
Signal magnitude is directly proportional to electric current.This signal is input to signal processing unit U2, signal processing unit U2 by this signal into
Digitized processing, then wirelessly sends.
In one embodiment, push-pull type favour stone magnetic resistance full-bridge U1 uses tunnel magneto resistance.
In the present embodiment, due to push-pull type favour stone magnetic resistance full-bridge U1, i.e. the operating current of tunnel magneto resistance is very low, only
The microampere order of magnitude, will not generate heat, therefore service life is grown.
In one embodiment, push-pull type favour stone magnetic resistance full-bridge U1 and signal processing unit U2 pass through epoxy encapsulation
One.
In the present embodiment, push-pull type favour stone magnetic resistance full-bridge U1 and signal processing unit U2 play environment environmental protection, dust-proof, anti-
It is damp, shockproof, improve reliability.
With reference to Fig. 2, in one embodiment, radio-cell U21 is built in signal processing unit U2.
In the present embodiment, radio-cell U21 belongs to a part of signal processing unit U2, and signal processing unit U2 passes through nothing
Line unit U21 is transmitted voltage signal.
With reference to Fig. 3, in one embodiment, radio-cell U21 is placed outside signal processing unit U2.
In the present embodiment, radio-cell U21 is not belonging to a part of signal processing unit U2, and signal processing unit U2 passes through
Radio-cell U21 is transmitted voltage signal.
In one embodiment, a kind of magneto-resistive current sensor, further includes external the first signal transceiver and mutual inductor,
First signal transceiver is connected with mutual inductor；Further include secondary signal transceiver, secondary signal transceiver and push-pull type favour stone
Magnetic resistance full-bridge U1 is connected；Also, the first signal transceiver and secondary signal transceiver wireless connection.In use, by the first signal
Transceiver and mutual inductor are installed on line side, then send a control signal by secondary signal transceiver, make mutual inductor will
The signal detected is beamed back by the first signal transceiver, this process realizes wireless and remote detection.Solve at present only
The problem of energy near radio detection.Also, the signal strength of the first signal transceiver and secondary signal transceiver is according to following
Equation is adjusted, Q~L*I (u, n2).Wherein, Q is signal strength, and L receives and dispatches for the first signal transceiver and secondary signal
The distance between device, I are the electric current in line side, u and n2Positive related parameter between Q and L, I.In fact, between Q and L, I
Positive correlation, if the distance between the first signal transceiver and secondary signal transceiver are big, corresponding signal strength is also big；If
The electric current in line side is big, and corresponding signal strength is also big.Above to the adjusting of signal strength, contribute to push-pull type favour stone magnetic resistance
The detection of full-bridge U1, because distorted signals is small.
Particular embodiments described above, has carried out into one the purpose of this utility model, technical solution and beneficial effect
The detailed description of step, it will be appreciated that the foregoing is merely specific embodiment of the utility model, is not used to limit this reality
With new protection domain.Particularly point out, to those skilled in the art, it is all the spirit and principles of the utility model it
Any modification, equivalent substitution, improvement and etc. that are interior, being done, should be included within the scope of protection of this utility model.
Claims (5)
1. a kind of magneto-resistive current sensor, it is characterised in that including connected push-pull type favour stone magnetic resistance full-bridge (U1) and signal
Processing unit (U2)；
The push-pull type favour stone magnetic resistance full-bridge (U1) is used to send the current signal of detection to the signal processing unit
(U2)；
The signal processing unit (U2) is used to be digitized processing to the current signal, and passes through radio-cell
(U21) it is transmitted.
2. magneto-resistive current sensor according to claim 1, it is characterised in that the push-pull type favour stone magnetic resistance full-bridge
(U1) tunnel magneto resistance is used.
3. magneto-resistive current sensor according to claim 1, it is characterised in that the push-pull type favour stone magnetic resistance full-bridge
(U1) and the signal processing unit (U2) passes through epoxy encapsulation one.
4. magneto-resistive current sensor according to claim 1, it is characterised in that the radio-cell (U21) is built in institute
State signal processing unit (U2).
5. magneto-resistive current sensor according to claim 1, it is characterised in that the radio-cell (U21) is placed outside institute
State signal processing unit (U2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721340890.6U CN207248978U (en) | 2017-10-18 | 2017-10-18 | Magneto-resistive current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721340890.6U CN207248978U (en) | 2017-10-18 | 2017-10-18 | Magneto-resistive current sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207248978U true CN207248978U (en) | 2018-04-17 |
Family
ID=61882656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721340890.6U Expired - Fee Related CN207248978U (en) | 2017-10-18 | 2017-10-18 | Magneto-resistive current sensor |
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| Country | Link |
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| CN (1) | CN207248978U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107643439A (en) * | 2017-10-18 | 2018-01-30 | 叶有福 | Magneto-resistive current sensor |
-
2017
- 2017-10-18 CN CN201721340890.6U patent/CN207248978U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107643439A (en) * | 2017-10-18 | 2018-01-30 | 叶有福 | Magneto-resistive current sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180417 Termination date: 20211018 |
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| CF01 | Termination of patent right due to non-payment of annual fee |