CN209372940U - Hall sensing formula current detection means - Google Patents
Hall sensing formula current detection means Download PDFInfo
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- CN209372940U CN209372940U CN201822168185.3U CN201822168185U CN209372940U CN 209372940 U CN209372940 U CN 209372940U CN 201822168185 U CN201822168185 U CN 201822168185U CN 209372940 U CN209372940 U CN 209372940U
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- 238000001514 detection method Methods 0.000 title claims abstract description 104
- 230000003321 amplification Effects 0.000 claims description 17
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 17
- 230000001681 protective effect Effects 0.000 claims description 6
- 238000005538 encapsulation Methods 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000012795 verification Methods 0.000 abstract description 2
- 239000004020 conductor Substances 0.000 description 7
- 230000005611 electricity Effects 0.000 description 5
- 230000004907 flux Effects 0.000 description 4
- 230000005355 Hall effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005426 magnetic field effect Effects 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model relates to a kind of hall sensing formula current detection means, belong to current detection means technical field, the main points of its technical scheme are that current detection module includes the switching circuit of open loop Hall current detection unit, closed loop Hall current detection unit and divided ring Hall current detection unit and closed loop Hall current detection unit switched conductive including magnet ring and the current detection module being arranged on magnet ring；It solves existing when testing the electric current in cable, needs to be selected according to the measurement condition of electric current and use open loop Hall current sensor or Closed Loop Hall, inconvenient problem；It can select to carry out detection to electric current by open loop Hall detection unit or closed loop Hall verification unit detects according to applying working condition, it is easy to operate.
Description
Technical field
The utility model relates to current detection means technical fields, fill more particularly, to a kind of hall sensing formula current detecting
It sets.
Background technique
Hall current sensor is according to Hall effect principle, for a kind of device detect in cable.Hall electricity
The output voltage detection dress that flow sensor generally comprises a magnetic core, is set to the coil of magnetic core primary side and is set to magnetic core pair side
It sets.When coil passes through electric current, magnetic field is generated around coil, the size in magnetic field is directly proportional to the size for the electric current for flowing through coil.
This magnetic field is assembled by magnetic core, is then detected with the hall device on magnetic core pair side, variation and Hall device due to magnetic field
The output voltage signal of part has good linear relationship, and therefore, the output signal that secondary side output voltage detection device measures can be with
The size of electric current in direct reactor coil.
Hall current sensor is generally divided into two kinds, including open loop Hall current sensor and closed path sensor.It opens
Ring Hall sensor utilizes magnetic field effect, and when primary current flows through a root long conducting wire, a magnetic field will be generated around conducting wire, this
The size in one magnetic field is directly proportional to the electric current for flowing through conducting wire, and the magnetic field of generation is gathered in magnet ring, passes through Hall in magnet ring air gap
Element measures and amplifies output, and output voltage accurately reflects primary current.Closed loop Hall current sensor is based on
Magnetic balance type hall principle, i.e. closed loop principle, when primary current IP generate magnetic flux concentrated in magnetic circuit by high-quality magnetic core,
Hall element, which is fixed in air gap, detects magnetic flux, and reversed compensation electric current is exported by the multiturn coil being wound on magnetic core, is used for
The magnetic flux that primary side IP is generated is offset, so that magnetic flux remains zero in magnetic circuit.By the processing of special circuit, sensor it is defeated
Outlet can export the curent change of accurate reflection primary current.
At present when testing the electric current in cable, needs to be selected according to the measurement condition of electric current and use open loop Hall
Current sensor or Closed Loop Hall, therefore staff generally requires to carry two kinds of Hall current sensors, right
It is inconvenient when current detecting in cable.
Utility model content
The purpose of the utility model is to provide a kind of hall sensing formula current detection means, can be selected according to applying working condition
It selects and detection is carried out to electric current by open loop Hall detection unit or closed loop Hall verification unit detects, it is easy to operate fast
It is prompt.
The above-mentioned purpose of utility model of the utility model has the technical scheme that a kind of hall sensing
Formula current detection means, including magnet ring and the current detection module being arranged on magnet ring, the current detection module includes open loop
Hall current detection unit, closed loop Hall current detection unit and divided ring Hall current detection unit and closed loop Hall current
The switching circuit of detection unit switched conductive.
By using above-mentioned technical proposal, hall sensing formula current detection means including magnet ring and is arranged on magnet ring
Current detection module, current detection module include open loop Hall current detection unit, closed loop Hall current detection unit and right
The switching circuit of open loop Hall current detection unit and closed loop Hall current detection unit switched conductive；Switched by switching circuit
The on state of open loop Hall current detection unit and closed loop Hall current detection unit, and then examined according to hall sensing formula electric current
Survey device application operating condition, select to use open loop Hall current detection unit or closed loop Hall current detection unit in cable
Current value detected, keep the testing result to electric current in cable more accurate.
The utility model is further arranged to: detection opening being arranged on the magnet ring, is provided between the detection opening
Hall element；The open loop Hall current detection unit includes amplifier, the positive input and Hall element of the amplifier
Positive output end be connected, the negative input of the amplifier is connected with the negative sense output end of Hall element；The amplifier
Potential difference between output end and Earth Surface is output voltage.
By using above-mentioned technical proposal, detection opening is set on magnet ring, is provided with Hall element between detection opening；It opens
Ring Hall current detection unit includes amplifier, and the positive input of amplifier is connected with the positive output end of Hall element, puts
The big negative input of device is connected with the negative sense output end of Hall element；Amplifier out and Earth Surface are output voltage；
According to Hall effect, when tested electric current flows through conductor, the magnetic field proportional to electric current is generated around conductor, and then pass through Hall
Element measures the magnetic field of generation, and generates output voltage by Hall sensor；By amplifier to hall sensing
The voltage of device output amplifies, and is that output voltage detects to the potential difference between amplifier out and Earth Surface,
And then obtain the size of tested electric current.
The utility model is further arranged to: the closed loop Hall current detection unit includes amplification secondary coil and output
Secondary coil；The amplification secondary coil and output secondary coil are respectively wound around the both ends of detection opening, the secondary side of the amplification
One end of coil is connected with output secondary coil, and the other end of the amplification secondary coil is connected with the output end of amplifier；Institute
It states output secondary coil and is in series with output resistance, the output resistance ground connection setting.
By using above-mentioned technical proposal, closed loop Hall current detection unit includes amplification secondary coil and the secondary sideline of output
Circle；It amplification secondary coil and exports secondary coil and is respectively wound around the both ends of detection opening, amplify one end of secondary coil and defeated
Secondary coil is connected out, and the other end for amplifying secondary coil is connected with the output end of amplifier；Output secondary coil is in series with defeated
Resistance out, output resistance ground connection setting；And then when electricity passes through measured conductor, the magnetic field generated by conductor is to Hall element
Effect generates output voltage；And then it is amplified by the voltage that amplifier exports Hall sensor, and then in output resistance
Compensation electric current is generated in the circuit at place, by measuring to compensation electric current, to obtain the size of measurement electric current.
The utility model is further arranged to: the switching circuit include the first normal open switch, the second normal open switch and
Control the switch unit that the first normal open switch and the second normal open switch are closed at and disconnect；First normal open switch is connected on
Amplifier out and amplification secondary coil between, second normal open switch be connected on output resistance and output secondary coil it
Between.
By using above-mentioned technical proposal, switching circuit includes the first normal open switch, the second normal open switch and control the
The switch unit that one normal open switch and the second normal open switch are closed at and disconnect；First normal open switch is connected on amplifier output
Between end and amplification secondary coil, the second normal open switch is connected between output resistance and output secondary coil；Logical switch unit
The first normal open switch and the second normal open switch are disconnected, and then disconnects closed loop Hall current detection unit, and then suddenly by open loop
You detect the size of electric current current detecting unit；It is opened by the way that switch unit the first normal open switch of closure and second are normally opened
It closes, and then by conducting closed loop Hall current detection unit, thus by closed loop Hall current detection unit to the size of electric current
It is tested.
The utility model is further arranged to: first normal open switch, the second normal open switch use electromagnetic switch, described
Switch unit includes electromagnetic relay and starts switch, and first normal open switch and the second normal open switch are by electromagnetic relay control
System, the electromagnetic relay connects with starting switch, and the electromagnetic relay, which is grounded, to be arranged, described to start switch access power supply.
By using above-mentioned technical proposal, the first normal open switch, the second normal open switch use electromagnetic switch, switch unit packet
It includes electromagnetic relay and starts switch, the first normal open switch and the second normal open switch are controlled by electromagnetic relay, electromagnetic relay
It connects with starting switch, electromagnetic relay ground connection setting starts switch access power supply, and disconnection starts switch, and electromagnetic relay loses
Electricity, the first normal open switch and the second normal open switch are in an off state；Closure starting folding, electromagnetic relay conducting, first often
Switch and the second normal open switch closure, to conveniently be examined to closed loop Hall current detection unit and open loop Hall current
The conducting for surveying unit switches over.
The utility model is further arranged to: the forward direction of the amplifier in and negative input and amplifier is defeated
Enter end and negative input is in series with protective resistance respectively.
By using above-mentioned technical proposal, by the setting of protective resistance, prevents tested electric current from increasing suddenly, in turn result in
Hall element exports the increase of electric current, to cause the damage to amplifier.
The utility model is further arranged to: the Hall element uses paster type encapsulation.
By using above-mentioned technical proposal, using paster type encapsulation, when being welded, it does not need via hole, welding surface and device
Part is fixed together, small in size, saves space.
The utility model is further arranged to: the magnet ring is made using permanent magnet.
By using above-mentioned technical proposal, magnet ring is made using permanent magnet, and permanent magnet magnetism is stablized, not vulnerable to surrounding
Magnetic field influences and changes its magnetic field effect, is the preferred material for making magnet ring.
In conclusion the advantageous effects of the utility model are as follows:
1. hall sensing formula current detection means, including magnet ring and the current detection module being arranged on magnet ring, electric current inspection
Surveying module includes open loop Hall current detection unit, closed loop Hall current detection unit and divided ring Hall current detection unit
With the switching circuit of closed loop Hall current detection unit switched conductive；Switch open loop Hall current detection unit by switching circuit
With the on state of closed loop Hall current detection unit, and then according to the application operating condition of hall sensing formula current detection means, choosing
It selects to using open loop Hall current detection unit or closed loop Hall current detection unit to detect the current value in cable, makes
It is more accurate to the testing result of electric current in cable；
2. switching circuit includes the first normal open switch, the second normal open switch；First normal open switch, the second normal open switch use
Electromagnetic switch, the first normal open switch and the second normal open switch are controlled by electromagnetic relay, and electromagnetic relay is connected with starting switch,
Electromagnetic relay ground connection setting, starts switch access power supply, disconnection starts switch, electromagnetic relay power loss, the first normal open switch
It is in an off state with the second normal open switch；Closure starting folding, electromagnetic relay conducting, the first normal open switch and second normally opened
It closes the switch, to conveniently be carried out to the conducting of closed loop Hall current detection unit and open loop Hall current detection unit
Switching.
Detailed description of the invention
Fig. 1 is the circuit diagram of hall sensing formula current detection means；
Fig. 2 is the circuit diagram of switch unit.
In figure, 1, magnet ring；11, detection opening；2, Hall element；3, current detection module；31, open loop Hall current detects
Unit；311, amplifier；32, closed loop Hall current detection unit；321, amplify secondary coil；322, secondary coil is exported；
323, output resistance；33, switching circuit；331, the first normal open switch；332, the second normal open switch；333, switch unit；3331,
Electromagnetic relay；3332, it starts switch；34, protective resistance.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
Referring to Fig.1, a kind of hall sensing formula current detection means, including magnet ring 1 and the current detecting being arranged on magnet ring 1
Module 3.Detection opening 11 is set on magnet ring 1, and the open surfaces of detection opening 11 are parallel to each other, are provided between detection opening 11
For detecting the Hall element 2 in magnetic field.The end face of Hall element 2 is parallel with the open surfaces of detection opening 11.Magnet ring 1 uses
Permanent magnet is made, and Hall element 2 uses paster type encapsulation.Magnet ring 1 is made using permanent magnet, and magnetic stability is not easy
The magnetism of itself is influenced and changed by surrounding magnetic field, is the preferred embodiment for making magnet ring 1.Hall element 2 is sealed using patch type
Dress, integrated level is high, small in size, saves space.
Referring to figure, current detection module 3 includes open loop Hall current detection unit 31, closed loop Hall current detection unit 32
And the switching circuit 33 of 32 switched conductive of divided ring Hall current detection unit 31 and closed loop Hall current detection unit.Open loop
Hall current detection unit 31 includes amplifier 311, the positive input of amplifier 311 and the positive output end of Hall element 2
It is connected, the negative input of amplifier 311 is connected with the negative sense output end of Hall element 2；311 output end of amplifier and big earth's surface
Face potential difference is output voltage V1.When tested electric current I passes through conductor, the magnetic field proportional to electric current is generated around conductor, because
This output voltage V1 is proportional to tested electric current, and output voltage V1 can accurately react the size of tested electric current I.
Closed loop Hall current detection unit 32 includes amplification secondary coil 321 and output secondary coil 322.Amplify secondary sideline
Circle 321 and output secondary coil 322 are respectively wound around the both ends of detection opening 11, amplify one end and the output of secondary coil 321
Secondary coil 322 is connected, and the other end of amplification secondary coil 321 is connected with the output end of amplifier 311.Export secondary coil
322 are in series with output resistance 323, and the ground connection setting of output resistance 323 is defeated by Hall element 2 when tested electric current I passes through conductor
The compensation electric current I2 of signal control flows through the field compensation of secondary coil generation out, when the magnetic field of primary and secondary side reaches balance
When, compensation electric current I2 can accurately react the value of tested electric current I.311 input terminal of amplifier and negative input and amplifier
311 positive input and negative input is in series with protective resistance 34 respectively.By the setting of protective resistance 34, prevent right
When tested electric current is detected, it is tested the unexpected increase of electric current and causes the damage to amplifier 311.
Referring to figure, switching circuit 33 includes that the first normal open switch 331, the second normal open switch 332 and control first are normally opened
The switch unit 333 that switch 331 and the second normal open switch 332 are closed at and disconnect.First normal open switch 331 is connected on amplification
Between 311 output end of device and amplification secondary coil 321, the second normal open switch 332 is connected on output resistance 323 and exports secondary sideline
Between circle 322.First normal open switch 331, the second normal open switch 332 use electromagnetic switch, and switch unit 333 includes electromagnetism relay
Device 3331 and start switch 3332, the first normal open switch 331 and the second normal open switch 332 are controlled by electromagnetic relay 3331, electricity
Magnetic relay 3331 is connected with starting switch 3332, and the ground connection setting of electromagnetic relay 3331 starts switch 3332 access power supplys.When
When detecting using open loop Hall current detection unit 31 to electric current, 3332 disconnections will be started switch, first normally opened are opened at this time
Pass 331 and the second normal open switch 332 are in an off state, and then are that output is electric by 311 output end of amplifier and Earth Surface
V1 is pressed, obtains the size of tested electric current I.When being detected using closed loop Hall current detection unit 32 to electric current, closure is opened
Dynamic switch 3332, electromagnetic relay 3331 must conduct, and then the first normal open switch 331 of control and the second normal open switch 332 close
It closes, and then obtains the size of tested electric current I by compensating electric current I2.
The implementation principle of the present embodiment are as follows:
According to hall sensing formula current detection means application operating condition, selection uses 31 pairs of electricity of open loop Hall current detection unit
Stream detect or is detected using closed loop Hall current detection unit 32 to electric current.When selection uses open loop Hall current
When detection unit 31 detects electric current, 3332 disconnections will be started switch, and then first switch and the second switch is in and disconnects
State, at this point, by, as output voltage V1, passing through output voltage to the potential difference between 311 output end of amplifier and the earth
V1, and then obtain the size of tested electric current.When selection detects electric current using closed loop current detection unit, starting is opened
3332 closures are closed, and then are closed first switch and the second switch, and then closure Hall current detection unit is in the conductive state,
And then the compensation electric current I2 passed through by output resistance 323, obtain the size of tested electric current.
The embodiment of present embodiment is the preferred embodiment of the utility model, and not limitation is originally practical new according to this
The protection scope of type, therefore: the equivalence changes that all structures, shape, principle according to the utility model are done should all be covered by practical
Within novel protection scope.
Claims (7)
1. a kind of hall sensing formula current detection means, including magnet ring (1) and the current detection module being arranged on magnet ring (1)
(3), it is characterised in that: the current detection module (3) includes open loop Hall current detection unit (31), the inspection of closed loop Hall current
Survey unit (32) and divided ring Hall current detection unit (31) and closed loop Hall current detection unit (32) switched conductive
Switching circuit (33)；Detection opening (11) are set on the magnet ring (1), are provided with Hall element between the detection opening (11)
(2)；The open loop Hall current detection unit (31) includes amplifier (311), the positive input of the amplifier (311) with
The positive output end of Hall element (2) is connected, and the negative sense of the negative input and Hall element (2) of the amplifier (311) is defeated
Outlet is connected；Potential difference of the amplifier (311) between output end and Earth Surface is output voltage.
2. hall sensing formula current detection means according to claim 1, it is characterised in that: the closed loop Hall current inspection
Surveying unit (32) includes amplification secondary coil (321) and output secondary coil (322)；The amplification secondary coil (321) and defeated
Secondary coil (322) is respectively wound around the both ends of detection opening (11), one end of amplification secondary coil (321) and output out
Secondary coil (322) is connected, and the other end of amplification secondary coil (321) is connected with the output end of amplifier (311)；It is described
Output secondary coil (322) is in series with output resistance (323), output resistance (323) the ground connection setting.
3. hall sensing formula current detection means according to claim 2, it is characterised in that: switching circuit (33) packet
Include the first normal open switch (331), the second normal open switch (332) and control the first normal open switch (331) and the second normal open switch
(332) switch unit (333) for being closed at and disconnecting；First normal open switch (331) is connected on amplifier (311) output
Between end and amplification secondary coil (321), second normal open switch (332) is connected on output resistance (323) and exports secondary side
Between coil (322).
4. hall sensing formula current detection means according to claim 3, it is characterised in that: first normal open switch
(331), the second normal open switch (332) uses electromagnetic switch, and the switch unit (333) includes electromagnetic relay (3331) and opens
Dynamic switch (3332), first normal open switch (331) and the second normal open switch (332) are controlled by electromagnetic relay (3331),
The electromagnetic relay (3331) is connected with (3332) are started switch, electromagnetic relay (3331) the ground connection setting, described to open
Dynamic switch (3332) accesses power supply.
5. hall sensing formula current detection means according to claim 4, it is characterised in that: the amplifier (311) is defeated
The positive input and negative input for entering end and negative input and amplifier (311) are in series with protective resistance respectively
(34)。
6. hall sensing formula current detection means according to claim 1, it is characterised in that: the Hall element (2) is adopted
Use paster type encapsulation.
7. hall sensing formula current detection means according to claim 1, it is characterised in that: the magnet ring (1) is using forever
Magnet is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822168185.3U CN209372940U (en) | 2018-12-21 | 2018-12-21 | Hall sensing formula current detection means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822168185.3U CN209372940U (en) | 2018-12-21 | 2018-12-21 | Hall sensing formula current detection means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209372940U true CN209372940U (en) | 2019-09-10 |
Family
ID=67830347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822168185.3U Expired - Fee Related CN209372940U (en) | 2018-12-21 | 2018-12-21 | Hall sensing formula current detection means |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209372940U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112290605A (en) * | 2020-10-16 | 2021-01-29 | 上海无线电设备研究所 | Universal multi-channel power-up device for radio equipment test system |
| WO2021208135A1 (en) * | 2020-04-13 | 2021-10-21 | 深圳市知用电子有限公司 | Closed-loop current transformer |
-
2018
- 2018-12-21 CN CN201822168185.3U patent/CN209372940U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021208135A1 (en) * | 2020-04-13 | 2021-10-21 | 深圳市知用电子有限公司 | Closed-loop current transformer |
| US12013417B2 (en) | 2020-04-13 | 2024-06-18 | Shenzhen Zhiyong Electronics Co., Ltd. | Closed loop current transformer |
| CN112290605A (en) * | 2020-10-16 | 2021-01-29 | 上海无线电设备研究所 | Universal multi-channel power-up device for radio equipment test system |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190910 |