CN111999541A - Anti-magnetic disturbance integrated nondestructive current detection high-precision intelligent sensor probe - Google Patents
Anti-magnetic disturbance integrated nondestructive current detection high-precision intelligent sensor probe Download PDFInfo
- Publication number
- CN111999541A CN111999541A CN202010863755.XA CN202010863755A CN111999541A CN 111999541 A CN111999541 A CN 111999541A CN 202010863755 A CN202010863755 A CN 202010863755A CN 111999541 A CN111999541 A CN 111999541A
- Authority
- CN
- China
- Prior art keywords
- magnetic core
- signal
- magnetic
- current
- hall sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 43
- 239000000523 sample Substances 0.000 title claims abstract description 33
- 230000005291 magnetic effect Effects 0.000 claims abstract description 117
- 230000005284 excitation Effects 0.000 claims abstract description 40
- 238000004804 winding Methods 0.000 claims abstract description 30
- 239000004020 conductor Substances 0.000 claims abstract description 29
- 230000005347 demagnetization Effects 0.000 claims abstract description 10
- 230000002238 attenuated effect Effects 0.000 claims description 11
- 230000010355 oscillation Effects 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 230000003247 decreasing effect Effects 0.000 claims description 6
- 230000035945 sensitivity Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 230000002349 favourable effect Effects 0.000 abstract description 4
- 230000000295 complement effect Effects 0.000 abstract description 2
- 230000008030 elimination Effects 0.000 abstract description 2
- 238000003379 elimination reaction Methods 0.000 abstract description 2
- 230000009977 dual effect Effects 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 description 20
- 238000010586 diagram Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 241000446313 Lamella Species 0.000 description 5
- 230000005389 magnetism Effects 0.000 description 5
- 230000006698 induction Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004043 responsiveness Effects 0.000 description 2
- 238000013473 artificial intelligence Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
- G01R15/183—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using transformers with a magnetic core
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
Abstract
An anti-magnetic interference integrated nondestructive current detection high-precision intelligent sensor probe is used for detecting the current of a conductor to be detected and comprises a Hall sensor, an attenuation excitation driver, an excitation winding and a magnetic core; the attenuation excitation driver generates a degressive bipolar pulsating current which is demagnetized by taking the excitation winding as a magnetic core; still set up singlechip MCU to command the demagnetization of magnetic core and go on through the magnetic core pickup response alternating signal timesharing, be favorable to improving signal accuracy, so the alternating frequency of two kinds of states, the timesharing proportion is optimized by MCU and is implemented, have hall perceptron (300) and excitation winding (410) dual signal structure, accurately judge real-time tracking current curve through its signal relation, the sensor advantage of two kinds of principles is complementary and carried out organic combination with elimination remanence interference, be favorable to the failure protection, have higher innovation type and practicality, satisfy and satisfy high-precision high reliability control demands in fields such as industry intelligent control and car electric drive.
Description
Technical Field
The invention belongs to the technical field of intelligent manufacturing and electronic sensors, and particularly relates to an anti-magnetic interference integrated nondestructive current detection high-precision intelligent sensor probe.
Background
With the development of artificial intelligence control technology, various electronic sensors have been developed from single index monitoring to comprehensive intelligent detection, and various intelligent devices require high-precision sensors.
The current monitoring in electromechanical equipment becomes an important technology in the technical field of intelligent equipment, the current monitoring is divided into alternating current monitoring and direct current detection, and the alternating current monitoring and the direct current detection cannot be taken into consideration for practicality. Among numerous current monitoring technologies, the Hall detection mode of contactless indirect detection has unique technical advantages, can be in indirect contact with a wire to be detected, does not need to be provided with a large-current sampling resistor, and is very convenient to detect. However, some devices often contain ferromagnetic devices, and the residual magnetism on the ferromagnetic devices interferes with the detection accuracy of the hall sensing element, so that the signal accuracy is affected.
The technology is not only adopted in industries such as industry, mining industry, aerospace, medical electronics, household appliances and the like, but also has a considerable application prospect in automobiles, particularly in new energy electric drive systems, and the technical problems also exist.
Therefore, in the technical field, advanced technologies are innovated, which are more required for high-precision detection or monitoring of the current of the cable and the conductor and can be more accurately used in application scenes such as feedback control, standard exceeding monitoring, overcurrent protection, surge impact monitoring, phase monitoring and protection, identification of the relation between the current and the torque, position detection and the like.
Disclosure of Invention
In order to meet the technical requirements of high-precision contactless current monitoring and enable an intelligent detection and control system to more accurately realize the functional indexes of feedback control, overproof monitoring, overcurrent protection, surge impact monitoring, phase monitoring and protection, identification of the relation between current and torque, position detection and the like, the technical scheme of the invention provides an anti-magnetic disturbance integrated nondestructive current detection high-precision intelligent sensor probe for detecting the current of a conductor to be detected, which is characterized by comprising the following steps: the magnetic field sensor comprises a Hall sensor, an attenuation excitation driver, an excitation winding and a magnetic core;
the attenuating excitation driver comprises an electronic signal generator, the electronic signal generator generates a gradually decreased bipolar pulsating current, the gradually decreased bipolar pulsating current is used for driving the excitation winding, and the excitation winding is wound on the magnetic core and is used for generating a gradually attenuated demagnetization magnetic field at the gradually decreased bipolar pulsating current to demagnetize the magnetic core;
the cross section of the magnetic core is annular or polygonal or elliptical, or the magnetic core is a split magnetic core, when the cross section of the magnetic core is annular or polygonal or elliptical, the magnetic core is arranged in a mode of surrounding the outside of a conductor of current to be measured, a gap is formed in the magnetic core, and the Hall sensor is installed in the gap; when the magnetic core is the split type magnetic core, the split type magnetic core is mutually buckled and surrounds the conductor of the current to be measured, and the Hall sensor detects the magnetic field on the magnetic core and converts the magnetic field into an electric signal to be output.
Furthermore, the anti-magnetic interference integrated nondestructive current detection high-precision intelligent sensor probe is characterized in that the Hall sensor is a linear active sensing device and is provided with a power reference ground, a power reference anode and a signal output end.
Furthermore, the anti-magnetic interference integrated nondestructive current detection high-precision intelligent sensor probe is characterized by further comprising an AD conversion unit, wherein the AD conversion unit receives an analog signal output by the Hall sensor signal, converts the analog signal into a digital pulse and outputs the digital pulse.
The high-precision intelligent sensor probe is characterized by further comprising an MCU unit, wherein the MCU unit receives the Hall sensor signals and converts the Hall sensor signals into Lin signals to be output, and the Lin signals are used for carrying out data communication with an external control system.
The magnetic core is of an openable annular structure with a rotating shaft on the circumference, the rotating shaft part of the magnetic core and the opening of the magnetic core divide the magnetic core into two petals, a shaft hole is formed in one side of the rotating shaft of each petal, the shaft holes of the two petals are overlapped to enable the rotating shaft to pass through, the upper end face of the circumferential direction of one side of the upper opening of each petal is neat, the two petals are tightly clamped and attached to the outer portion of a conductor of current to be detected, the Hall sensor is installed at the position of an opening gap, the sensing surface of the Hall sensor is aligned with one end face of the magnetic core and enables the direction of the magnetic field detected by the Hall sensor to be matched with the direction of the current to be detected, and even if the magnetic field sensitivity of the Hall sensor in the direction of the current to be detected is strongest.
The anti-magnetic interference integrated nondestructive current detection high-precision intelligent sensor probe is characterized in that the attenuation excitation driver comprises an oscillating circuit and a decay circuit, and a pulse signal with a certain frequency output by the oscillating circuit is changed into an electric signal which is attenuated gradually by the decay circuit and is output to the excitation winding.
Furthermore, the anti-magnetic interference integrated nondestructive current detection high-precision intelligent sensor probe is characterized in that the oscillation frequency of the oscillation circuit is 50-300 Hz.
Further, still provide an integrated nondestructive current detection high accuracy intelligent sensor probe of preventing magnetic disturbance, its special character lies in, still includes the lead terminal plug, the terminal of lead terminal plug includes power reference ground, power reference positive pole, signal output part, signal input part, the power reference ground with power reference positive pole does hall perceptron, decay excitation driver provide the power, signal input part is used for receiving the control command of host computer, signal output part is used for exporting the analog signal that hall perceptron obtained or the digital signal that obtains after AD changes.
Further, the anti-magnetic interference integrated nondestructive current detection high-precision intelligent sensor probe is characterized by further comprising an MCU unit, wherein the signal configuration relationship between the MCU unit and the excitation winding is as follows: the first state and the second state are alternately carried out, and the first state is as follows: the MCU outputs a gradually attenuated electrical signal for demagnetizing the magnetic core, and the first state is as follows: stopping providing the gradually attenuated electrical signal to the excitation winding, and receiving the electrical signal sensed by the excitation winding wound on the magnetic core for detecting the varying current in the conductor to be tested.
The invention has the beneficial effects that: the sensing surface of the Hall sensing element is in opposite contact with the circumferential end surface of the demagnetizable magnetic core, so that the magnetic core enhances the conductor magnetic field to enable the detection to be more sensitive and accurate, and the demagnetizing coil (winding) is arranged on the magnetic core to eliminate the residual magnetic field according to the degressive demagnetizing current sent by the control circuit, so that the detection of the Hall sensor is enabled to be less influenced by external remanence. Meanwhile, the double-state signal configuration can be carried out through the MCU and the excitation winding: demagnetization and receiving are carried out in a time-sharing manner, residual magnetism influence can be avoided, current change on a conductor to be detected can be sensed, responsiveness is improved, double detection of alternating current and direct current signals can be realized by combining the demagnetization sensor and the Hall sensor, sensitivity and precision of the sensor can be improved to a large extent, and the demagnetization sensor is favorable for being more accurately applied to technical scenes such as feedback control, standard exceeding monitoring, overcurrent protection, surge impact monitoring, phase monitoring and protection, identification of current and torque relation, position detection and the like. The technical requirements of high-precision control systems in the fields of industrial intelligent control, automobile electric drive and the like are met.
Drawings
FIG. 1 is a schematic view of the installation relationship between a conductor (100) to be tested and a magnetic core (200),
FIG. 2 is a schematic diagram of a circuit system of an integrated nondestructive current testing high-precision intelligent sensor probe for preventing magnetic disturbance according to an embodiment of the present invention,
figure 3 is a cross-sectional schematic view of a toroidal core structure with an opening according to an embodiment of the present invention,
figure 4 is a cross-sectional schematic view of a toroidal core structure with a rotating shaft according to an embodiment of the present invention,
figure 5 is an exploded view of a two-piece magnetic core of the magnetic core structure shown in figure 4,
figure 6 is an exploded view of a two-piece magnetic core of another magnetic core configuration provided by embodiments of the present invention,
figure 7 is a schematic diagram of a hall sensor (300),
FIG. 8 is a schematic diagram of a circuit system of an anti-magnetic disturbance integrated nondestructive current testing high-precision intelligent sensor probe with an MCU (data processing single chip microcomputer) unit according to an embodiment of the present invention,
FIG. 9 is a schematic diagram of output waveforms of an oscillation circuit (401) and a decay circuit (402) according to an embodiment of the present invention,
fig. 10 is a schematic diagram of a signal configuration relationship between the MCU unit (500) and the excitation winding (410) of the high-precision intelligent sensor probe according to the embodiment of the present invention.
Detailed Description
The invention realizes that the sensing surface of the Hall sensing element is oppositely contacted with the circumferential end surface of the demagnetizable magnetic core by a simpler structure, on one hand, the magnetic core enhances the conductor magnetic field, so that the detection is more sensitive and accurate, and on the other hand, because the demagnetizing coil (winding) is arranged on the magnetic core, the residual magnetic field can be eliminated according to the degressive demagnetizing current sent by the control circuit, so that the detection of the Hall sensor is less influenced by external residual magnetism. Meanwhile, the double-state signal configuration can be carried out through the MCU and the excitation winding: demagnetization and receiving are carried out in a time-sharing manner, residual magnetism influence can be avoided, current change on a conductor to be detected can be sensed, responsiveness is improved, double detection of alternating current and direct current signals can be realized by combining the demagnetization sensor and the Hall sensor, sensitivity and precision of the sensor can be improved to a large extent, and the demagnetization sensor is favorable for being more accurately applied to technical scenes such as feedback control, standard exceeding monitoring, overcurrent protection, surge impact monitoring, phase monitoring and protection, identification of current and torque relation, position detection and the like. The technical requirements of high-precision control systems in the fields of industrial intelligent control, automobile electric drive and the like are met, and the invention is explained in more detail by combining specific embodiments.
Example 1
The present embodiment is an anti-magnetic interference integrated nondestructive current detection high-precision intelligent sensor probe, as shown in fig. 1, which is used for detecting the current of a conductor 100 to be detected, in fig. 1, the conductor 100 passes through an annular magnetic core 200, and fig. 2 is an assembly structure schematic diagram of the sensor probe, and the structure includes: hall sensor 300, attenuated field driver 400, field winding 410, and magnetic core 200. The attenuating excitation driver comprises an electronic signal generator, the electronic signal generator generates a descending bipolar pulsating current, the descending bipolar pulsating current is used for driving an excitation winding, the excitation winding 410 is wound on the magnetic core 200 and is used for generating a gradually attenuating demagnetizing magnetic field for demagnetizing the magnetic core when the descending bipolar pulsating current generates, so that the influence of residual magnetism generated on the annular magnetic core by conductor current and a surrounding magnetic field can be greatly eliminated, and the actual detection accuracy of the Hall tends to be real.
The magnetic core can be designed into various structural forms with the cross section being annular or polygonal or elliptical, or the magnetic core can also be designed into a split type magnetic core, for example, when the cross section of the magnetic core is annular or polygonal or elliptical, the arrangement mode of the magnetic core is that the magnetic core surrounds the outer part of a conductor of current to be measured, a gap is arranged on the magnetic core, and a Hall sensor is arranged in the gap; when the magnetic core is the split type magnetic core, the split type magnetic core is buckled with each other and surrounds the outside of the conductor of the current to be measured, and the Hall sensor detects the magnetic field on the magnetic core and converts the magnetic field into an electric signal to be output. Fig. 3 shows a schematic representation of a magnetic core 200 with a circular cross section, the recess 201 being provided for mounting a hall sensor. Fig. 4 and 5 show a structural schematic of a split magnetic core 202, where two half-ring magnetic cores 202 and 203 are provided with shaft holes 204 and 205 at their uniform ends, the shaft holes are connected by a rotating shaft 206 to enable the two half magnetic cores to rotate around the rotating shaft, so as to be convenient for installation and matching with a lead-test conductor, and after the two half magnetic cores are buckled on the conductor to be tested, and after a hall sensor is installed at its middle opening, the two half magnetic cores can be fastened by a heat-shrinkable sleeve.
Fig. 6 shows a two-piece magnetic core structure, where the half- ring cores 207 and 208 are fastened to the conductor to be tested at appropriate positions, and the hall sensor is installed in the opening gap at one end, which can then be fastened by using a heat-shrinkable sleeve.
As an active sensing device, the hall sensor 300 can be made into a two-wire type or a three-wire type according to needs, and when the hall sensor 300 is a three-wire type as shown in fig. 7, the hall sensor has a power reference ground VG, a power reference positive electrode VC, and a signal output terminal S. As in the two-wire configuration, the hall sensor has only a power reference ground and signal outputs. Fig. 7 is a side view of the hall sensor at the upper part and a top view at the lower part.
Example 2
As shown in fig. 2, the anti-magnetic disturbance integrated nondestructive current detection high-precision intelligent sensor probe further includes an AD conversion unit 420, and the AD conversion unit 420 receives an analog signal output by the hall sensor 300, converts the analog signal into a digital pulse, and outputs the digital pulse.
Example 3
As shown in fig. 8, the anti-magnetic interference integrated nondestructive current detection high-precision intelligent sensor probe further includes an MCU unit 500, which is used as a data signal processor to receive the signal of the hall sensor 200 and convert it into an Lin signal for output, and is used for data communication with an external control system.
Example 4
As shown in fig. 4, the magnetic core of this kind of prevent magnetic disturbance integration nondestructive current detection high accuracy intelligent sensor probe is the open-close type loop configuration that has the pivot on the circumference, the pivot position of magnetic core and the opening of magnetic core divide into two lamellas with the magnetic core, pivot one side has the shaft hole on each lamella, the shaft hole stack of two lamellas is used for making the pivot pass, the circumferencial direction up end of each lamella upper shed one side is neat, two lamellas press from both sides the tight conductor that pastes the electric current that awaits measuring outside, opening gap position installation hall perceptron, hall perceptron's perception face is aimed at an terminal surface in the magnetic core and is made the direction that hall perceptron detected the magnetic field cooperate with the direction of the electric current that awaits measuring, even hall perceptron is.
Example 5
As shown in fig. 2 and fig. 3, the attenuation excitation driver 400 of the high-precision intelligent sensor probe includes an oscillation circuit 401 and a decay circuit 402, wherein the oscillation circuit 401 outputs a pulse signal with a certain frequency, and the pulse signal is changed into an electric signal which is attenuated gradually by the decay circuit and is output to the excitation winding. As shown in FIG. 9, for the waveform schematic diagram of the oscillation circuit and the decay-delaying circuit, the oscillation frequency of the oscillation circuit may preferably be 50-300 Hz.
Example 6
As shown in fig. 2, the terminal of the lead terminal plug of the high-precision intelligent sensor probe includes a power reference ground, a power reference anode, a signal output end and a signal input end, the power reference ground and the power reference anode provide power for the hall sensor and the attenuation excitation driver, the signal input end is used for receiving a control instruction of an upper computer, and the signal output end is used for outputting an analog signal obtained by the hall sensor or a digital signal obtained after AD conversion.
Example 7
As shown in fig. 8 and 10, the signal configuration relationship between the MCU unit 500 and the excitation winding 410 of the high-precision intelligent sensor probe is as follows: the first state and the second state are alternately performed, and the first state is as follows: the MCU outputs an electrical signal for providing a gradual decay to the core degaussing by the decay excitation driver 400, and the second state is: stopping providing the gradually attenuated electric signal to the excitation winding, and receiving the electric signal sensed by the excitation winding wound on the magnetic core for detecting the changed current in the conductor to be detected. The design has the advantages that the demagnetization of the magnetic core and the picking up of the induction alternating signal by the magnetic core are carried out in a time sharing way, which is beneficial to improving the signal precision, because the operation is controlled by the MCU, the alternating frequency and the time sharing proportion of the two states can be optimized and implemented by the MCU, or the magnetic core can be demagnetized once or several times when the machine is started, and then the induction signal can be picked up all the time, at the moment, the demagnetizing coil on the magnetic core is converted into the induction coil to be used as the variable current magnetic sensor of the conductor to be measured, thus, the high-precision intelligent sensor probe of the embodiment has the double signal structure of the Hall sensor 300 and the exciting winding 410, can more accurately judge the current change condition of the conductor to be measured through the signal relationship, track the current curve in real time, achieve the optimization control function of the intelligent sensor, and also has the failure protection function, namely, when one signal, the operating reliability of the system is improved, because the temperature resistance of the Hall element is not as good as that of the magnetic pulse sensor with the coil structure, but the direct current or the direct current with slow change is superior to Hull, the advantages of the sensors of the two principles are complementary and are organically combined with the elimination of residual magnetic interference, so that the technical scheme of the invention has higher innovation and practicability, and the requirements of high-precision control system technology upgrading and intelligent manufacturing high-precision and high-reliability control in the fields of industrial intelligent control, automobile electric drive and the like are met.
The embodiments of the present invention are only used for illustrating the technical solutions of the present invention, and are not limited to the present invention, and other embodiments or other combinations obtained by equivalent substitution and non-inventive work fall within the scope of the present invention, which is defined by the appended claims.
Claims (9)
1. An anti-magnetic interference integrated nondestructive current detection high-precision intelligent sensor probe is used for detecting the current of a conductor to be detected and is characterized by comprising a Hall sensor, an attenuation excitation driver, an excitation winding and a magnetic core;
the attenuating excitation driver comprises an electronic signal generator, the electronic signal generator generates a gradually decreased bipolar pulsating current, the gradually decreased bipolar pulsating current is used for driving the excitation winding, and the excitation winding is wound on the magnetic core and is used for generating a gradually attenuated demagnetization magnetic field at the gradually decreased bipolar pulsating current to demagnetize the magnetic core;
the cross section of the magnetic core is annular or polygonal or elliptical, or the magnetic core is a split magnetic core, when the cross section of the magnetic core is annular or polygonal or elliptical, the magnetic core is arranged in a mode of surrounding the outside of a conductor of current to be measured, a gap is formed in the magnetic core, and the Hall sensor is installed in the gap; when the magnetic core is the split type magnetic core, the split type magnetic core is mutually buckled and surrounds the conductor of the current to be measured, and the Hall sensor detects the magnetic field on the magnetic core and converts the magnetic field into an electric signal to be output.
2. The integrated nondestructive current detection high-precision intelligent sensor probe for preventing magnetic disturbance according to claim 1, wherein the Hall sensor is a linear active sensing device and is provided with a power reference ground, a power reference positive pole and a signal output end.
3. The integrated nondestructive current detection high-precision intelligent sensor probe for preventing magnetic disturbance according to claim 1, characterized by further comprising an AD conversion unit, wherein the AD conversion circuit unit receives the Hall sensor signal output analog signal, converts the Hall sensor signal output analog signal into a digital pulse and outputs the digital pulse.
4. The anti-magnetic interference integrated nondestructive current detection high-precision intelligent sensor probe according to claim 3, characterized by further comprising an MCU unit, wherein the MCU unit receives the Hall sensor signal and converts the Hall sensor signal into an Lin signal for output, and the Lin signal is used for data communication with an external control system.
5. The anti-magnetic interference integrated nondestructive current detection high-precision intelligent sensor probe according to claim 1, wherein the magnetic core is an openable ring structure with a rotating shaft on the circumference, the rotating shaft part of the magnetic core and the opening of the magnetic core divide the magnetic core into two petals, one side of the rotating shaft on each petal is provided with a shaft hole, the shaft holes of the two petals are overlapped for the rotating shaft to pass through, the upper end surface of one side of the opening on each petal in the circumferential direction is neat, the two petals are clamped and attached to the outside of a conductor of a current to be detected, the hall sensor is installed at the opening gap part, the sensing surface of the hall sensor is aligned with one end surface of the magnetic core, and the direction of the magnetic field detected by the hall sensor is matched with the direction of the current to be detected, even if the magnetic field sensitivity of the hall sensor in the direction of the.
6. The integrated anti-magnetic interference nondestructive current detection high-precision intelligent sensor probe according to claim 1, wherein the attenuation excitation driver comprises an oscillating circuit and a decay circuit, and the oscillating circuit outputs a pulse signal with a certain frequency, and the pulse signal is changed into an electric signal which is gradually attenuated by the decay circuit and then is output to the excitation winding.
7. The integrated nondestructive current detection high-precision intelligent sensor probe for preventing magnetic disturbance according to claim 6, wherein the oscillation frequency of the oscillation circuit is 50-300 Hz.
8. The anti-magnetic interference integrated nondestructive current detection high-precision intelligent sensor probe according to claim 1 is characterized by further comprising a lead terminal plug, wherein a terminal of the lead terminal plug comprises a power reference ground, a power reference anode, a signal output end and a signal input end, the power reference ground and the power reference anode provide power for the Hall sensor and the attenuation excitation driver, the signal input end is used for receiving a control instruction of an upper computer, and the signal output end is used for outputting an analog signal obtained by the Hall sensor or a digital signal obtained after AD conversion.
9. The anti-magnetic interference integrated nondestructive current detection high-precision intelligent sensor probe according to claim 1 is characterized by further comprising an MCU unit, wherein the signal configuration relationship between the MCU unit and the excitation winding is as follows: the first state and the second state are alternately carried out, and the first state is as follows: the MCU outputs a gradually attenuated electric signal for demagnetizing the magnetic core, and the second state is as follows: stopping providing the gradually attenuated electrical signal to the excitation winding, and receiving the electrical signal sensed by the excitation winding wound on the magnetic core for detecting the varying current in the conductor to be tested.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010863755.XA CN111999541A (en) | 2020-09-10 | 2020-09-10 | Anti-magnetic disturbance integrated nondestructive current detection high-precision intelligent sensor probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010863755.XA CN111999541A (en) | 2020-09-10 | 2020-09-10 | Anti-magnetic disturbance integrated nondestructive current detection high-precision intelligent sensor probe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111999541A true CN111999541A (en) | 2020-11-27 |
Family
ID=73471877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010863755.XA Pending CN111999541A (en) | 2020-09-10 | 2020-09-10 | Anti-magnetic disturbance integrated nondestructive current detection high-precision intelligent sensor probe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111999541A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11372028B2 (en) * | 2019-12-03 | 2022-06-28 | Bombardier Transportation Gmbh | Remote sensor arrangement |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03235065A (en) * | 1990-02-09 | 1991-10-21 | Yaskawa Electric Mfg Co Ltd | Electromagnetic type digital current detector |
| CN105738685A (en) * | 2016-02-23 | 2016-07-06 | 南京中旭电子科技有限公司 | Hall current sensor of digital signal output |
| CN105785095A (en) * | 2016-04-21 | 2016-07-20 | 中车青岛四方机车车辆股份有限公司 | Constant-amplitude DC pulse signal measurement circuit and degaussing method thereof |
| CN106018915A (en) * | 2015-03-30 | 2016-10-12 | 株式会社田村制作所 | Current detector |
| CN110446933A (en) * | 2016-12-14 | 2019-11-12 | 韩国标准科学研究院 | More clamp current measuring devices and current measurement system |
-
2020
- 2020-09-10 CN CN202010863755.XA patent/CN111999541A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03235065A (en) * | 1990-02-09 | 1991-10-21 | Yaskawa Electric Mfg Co Ltd | Electromagnetic type digital current detector |
| CN106018915A (en) * | 2015-03-30 | 2016-10-12 | 株式会社田村制作所 | Current detector |
| CN105738685A (en) * | 2016-02-23 | 2016-07-06 | 南京中旭电子科技有限公司 | Hall current sensor of digital signal output |
| CN105785095A (en) * | 2016-04-21 | 2016-07-20 | 中车青岛四方机车车辆股份有限公司 | Constant-amplitude DC pulse signal measurement circuit and degaussing method thereof |
| CN110446933A (en) * | 2016-12-14 | 2019-11-12 | 韩国标准科学研究院 | More clamp current measuring devices and current measurement system |
Non-Patent Citations (1)
| Title |
|---|
| 余愿等, 华中科技大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11372028B2 (en) * | 2019-12-03 | 2022-06-28 | Bombardier Transportation Gmbh | Remote sensor arrangement |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5109223A (en) | Apparatus for inductive signal transfer in sensing heads | |
| CN110007133B (en) | Digital AC/DC current sensor and current detection method | |
| WO2002093121A1 (en) | Magnetoelastic torque sensor | |
| KR850000268B1 (en) | Rotor measurement system using reflected load transmission | |
| CN111999541A (en) | Anti-magnetic disturbance integrated nondestructive current detection high-precision intelligent sensor probe | |
| EP0620647A2 (en) | Magnetically activated proximity switch | |
| CN112327225A (en) | Magnetic field detection method based on magneto-dielectric effect, test device and working method thereof | |
| KR102493154B1 (en) | Foreign Object Detector and wireless charging system | |
| US7148679B2 (en) | Transformer probe | |
| JPH10232259A (en) | Current leakage sensor | |
| CN207798899U (en) | A kind of current sensor and monitoring system | |
| CN208224351U (en) | One kind being based on Hall magnetic balance type voltage sensor | |
| CA2593553C (en) | Aerospace movement probe | |
| US5483156A (en) | Magnetic field alternation detecting apparatus | |
| CN108414798A (en) | A kind of current sensor, monitoring system and monitoring method | |
| US5136241A (en) | Device for sensing unwanted electric and magnetic fields in a remote sensor electrical lead | |
| EP0431935B1 (en) | High pressure proximity sensor | |
| CN112612062B (en) | Gold inspection machine and gold inspection machine transmitting module | |
| CN201508411U (en) | On-line detection device with by-pass magnetic circuit for iron core bias magnet of transformer | |
| CN115792333B (en) | Charging current detection method and device for charging equipment | |
| CN115684701B (en) | High-resolution wide-range magnetic modulation type direct current sensor based on differential demodulation | |
| CN204116443U (en) | Square electric current is bored a hole the AC current transducer of anti-strong electromagnetic | |
| Huang et al. | Test and Analysis of Electromagnetic Sensitive Effects in Resolver System | |
| CN216310107U (en) | Digital quantity Hall current sensor and sensor debugging circuit | |
| EP0416225A2 (en) | Magnetic field pickup for automotive ignition diagnostics |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201127 |