CN208984788U - A kind of digital magnetic field scanned imagery device - Google Patents
A kind of digital magnetic field scanned imagery device Download PDFInfo
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- CN208984788U CN208984788U CN201821728528.0U CN201821728528U CN208984788U CN 208984788 U CN208984788 U CN 208984788U CN 201821728528 U CN201821728528 U CN 201821728528U CN 208984788 U CN208984788 U CN 208984788U
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- pedestal
- sliding rail
- direction sliding
- magnetic field
- objective table
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Abstract
The utility model discloses a kind of digital magnetic field scanned imagery devices, including pedestal, kinematic mount frame, three-dimension sensor probe, Y direction sliding rail is equipped in pedestal, pedestal is equipped with objective table, objective table is arranged on Y direction sliding rail, kinematic mount frame bottom is fixed on the base, Z-direction sliding rail is arranged in kinematic mount frame two sides, X-direction sliding rail is equipped with above objective table, the both ends of X-direction sliding rail are slidably arranged on Z-direction sliding rail, pedestal I is slidably set on X-direction sliding rail, three-dimension sensor probe is fixedly mounted on pedestal I, kinematic mount frame is equipped with slave computer, three-dimension sensor probe is connected with slave computer.The utility model is using differential generator probe as field scan device, host computer realizes the motion control to slave computer by Bluetooth wireless communication, field scan system is enabled to complete high-precision, quick field scan on the surface of tested sample, and can be in LCD and host computer real-time display field waveform figure.
Description
Technical field
The utility model relates to a kind of digital magnetic field scanned imagery devices.
Background technique
With electronic technology high frequency development and the products electronic product such as mobile phone, computer it is prevailing, they are brought
Electromagnetic field radiation problem have been to be concerned by more and more people, civilian electromagnetic field detection instrument becomes a kind of market demand.
It is all external import that existing electromagnetic field detection equipment is most of, and general electromagnetic field detection equipment is passed using optical fiber as signal
Defeated medium.But since the photoelectric conversion device of optical fiber transmission design is more expensive, it is unfavorable for the city of electromagnetic field detection equipment
Fieldization.On the other hand, electromagnetic field detection equipment can also be communicated using conducting wire with computer, but the signal on cable is easy
By the interference of electromagnetic field, so that measurement inaccuracy.
The patent of application number 201110061791.5 discloses a kind of three-dimensional magnetic field scanning system, and main includes that acquisition is single
Member, signal conversion unit, processing unit and display unit；Acquisition unit constitutes spherical sensors acquisition using three magnetic induction loops
Current signal；Signal conversion unit completes signal amplification, filtering and analog-to-digital conversion；Processing unit is the processing mould of computer system
Block；Display unit is computer screen, signal conversion unit is connected with processing unit with conducting wire complete data processing and
Data are shown；The invention can calculate distribution situation of the space magnetic field in space in (X, Y, Z) three durection components,
It is handled by computer graphics techniques displaying.
The patent of application number 201611160572.1 discloses a kind of multi-model field scan system, and main includes that probe moves
Dynamic sliding rail, magnet field probe, objective table, motion module support frame and Induced magnetic field model；Magnet field probe be single Hall chip architecture or
Three Hall chip architecture of person；Induced magnetic field model can be permanent magnet, electric magnetisation unit etc.；The invention may be implemented magnet field probe with
The relative dimensional of objective table moves, and carries out magnetic field detection to Induced magnetic field module, and shown by computer.
The patent of application number 201410669474.5 discloses a kind of flat magnetic field scanning imagery based on Hall sensor
System, main includes displacement platform, the next machine controller based on STM32, Hall sensor principle, difference of three-dimensional machinery system
Amplifying circuit, data collecting card, host computer and constant-current source etc.；Component to be measured connection constant-current source is placed in three-dimensional machinery by the invention
On exemplar platform on platform, starts three-dimensional machinery platform and Hall sensor module, set the parameter of motion platform, pass through data
The data that sensor acquires are sent to host computer by capture card, and the scanning of tested sample Surface field distribution is shown by host computer
Image.
There are two the prior art is main the shortcomings that aspect: 1, three-dimension sensor probe is popped one's head in using three Magnetic Sensors
Design, three Magnetic Sensors are respectively arranged in X, Y, Z-direction, for acquiring the magnetic-field component on three directions.Three sensings
The asymmetric arrangement of device will cause that output signal drift is big, lead to the measurement accuracy decline of probe；2, slave computer and host computer it
Between communication using conducting wire connect, due to conducting wire be placed directly within tested sample generation magnetic field environment in so that the letter on conducting wire
Interference number vulnerable to electromagnetic field, reduces the accuracy of measurement.
Summary of the invention
In order to solve the above-mentioned technical problem, the utility model provides the digital magnetic that a kind of structure is simple, measurement accuracy is high
Field scan imaging device.
The technical solution that the utility model solves the above problems is: a kind of digital magnetic field scanned imagery device, including bottom
Seat, objective table, kinematic mount frame, three-dimension sensor probe, power module, Y direction sliding rail, X-direction sliding rail, Z-direction
Sliding rail, the pedestal is interior to be equipped with Y direction sliding rail and power module, and power module provides working power, pedestal for whole device
It is equipped with objective table, objective table is slidably arranged on Y direction sliding rail, and the kinematic mount frame is located above objective table, fortune
Dynamic support frame bottom is fixed on the base, and kinematic mount frame two sides are symmetrical arranged two Z-direction sliding rails, the objective table top
Level is equipped with X-direction sliding rail, and the both ends of X-direction sliding rail are equipped with pedestal II, and two Z-directions are slidably arranged in pedestal II
On sliding rail, pedestal I is slidably set, and the three-dimension sensor probe is fixedly mounted on pedestal I, described on X-direction sliding rail
Kinematic mount frame is equipped with slave computer, and the signal output end of three-dimension sensor probe is connected with slave computer.
Above-mentioned digital magnetic field scanned imagery device, the three-dimension sensor probe are used for the acquisition of three-dimensional magnetic field data,
Using A3515 Surface Mount linear hall sensor as Magnetic Sensor, the matrix of three-dimension sensor probe is regular hexahedron, on matrix
6 Surface Mount linear hall sensors are arranged symmetrically using differential, every two Surface Mount linear hall sensor is one group, a positive and a negative
It is affixed on the opposite face of regular hexahedron respectively, the Surface Mount linear hall sensor of each dimension mutually arrangement in 90 °, in three-dimensional sensing
It is symmetrical on the X, Y, Z axis line of device probe, it is equidistant with O point；The Surface Mount linear hall sensor being in pair back to placement, and
Reversed up and down, to guarantee that two Surface Mount linear hall sensors export just reversed, differential output, i.e. sensor measurement exports
For the sum of two Surface Mount linear hall sensors.
Above-mentioned digital magnetic field scanned imagery device, the objective table are made of upper layer and lower layer, pass through bullet between upper and lower level
Spring screw is fixed；Objective table upper layer is that aluminum is used to place tested sample without magnetic sheet；Objective table lower layer is that aluminum without magnetic sheet and fills
Equipped with sliding block and Y direction servo drive motor, under the driving of Y direction servo motor, objective table is on Y direction sliding rail
Movement.
Above-mentioned digital magnetic field scanned imagery device, the slave computer include signal conditioning circuit, A/D conversion circuit, control
Device, watchdog circuit, bluetooth module and buffer area processed, input terminal and the three-dimension sensor of the signal conditioning circuit are popped one's head in defeated
Outlet be connected, the output end of signal conditioning circuit is connected with the input terminal of A/D conversion circuit, the output end of A/D conversion circuit and
Controller is connected, and controller is connect with watchdog circuit, bluetooth module, buffer area respectively, improves amplifying circuit to three-dimensional sensing
The electric signal of device probe output is sent into A/D conversion circuit after being filtered, amplifying, and A/D conversion circuit converts the electrical signal to number
Signal is transported in host computer by input controller after word signal, controller by bluetooth module.
Above-mentioned digital magnetic field scanned imagery device, the controller use ST Microelectronics ARM chip
STM32F103, STM32F103 are realized using variable static storage controller and A/D conversion circuit interactive information to digital signal
Processing；Information is sent to buffer area by direct memory access mode by STM32F103, passes through serial line interface and house dog electricity
Road, memory communication.
Above-mentioned digital magnetic field scanned imagery device, tested sample are permanent magnet or conductive material, are waited for when being permanent magnet
Test sample part is placed in objective table and directly carries out magnetic-field measurement, at the both ends of tested sample when being the conductive material material of non-permanent magnet
In addition constant-current source.
Above-mentioned digital magnetic field scanned imagery device, the pedestal I are equipped with for driving pedestal I in X-direction sliding rail
The X-direction servo motor of upper sliding, the pedestal II are equipped with for driving the pedestal II at X-direction sliding rail both ends in Z axis
The Z-direction servo motor slided on the sliding rail of direction.
Above-mentioned digital magnetic field scanned imagery device, the bluetooth module use HC-05 wireless blue tooth module, are used for short distance
From with point-to-point wireless data transmission and reception, communication distance be 10 meters, between the bluetooth module and slave computer using string
Port communications, the VCC pin of bluetooth module connect 3.3V power supply, GND pin ground connection, TXD pin and RXD the pin difference of bluetooth module
The serial input pin and serial input pin of controller are connected, the KEY pin and LED pipe foot configured on bluetooth module is all connected with
LED pipe foot to the parallel I/O pin of controller, bluetooth module is connected to the parallel I/O pin of controller, for monitoring bluetooth module
Pairing state, when input be high level when LED it is bright, illustrate successful matching, when input be low level when LED do not work, explanation is matched
To failure.
Above-mentioned digital magnetic field scanned imagery device, pedestal use all aluminium alloy structure.
Above-mentioned digital magnetic field scanned imagery device, the pedestal are equipped with LCD display, LCD display and slave computer
Connection.
The utility model has the beneficial effects that:
1, the utility model is using the three-dimensional machinery motion platform of three-dimensional magnetic field scanning means as carrier, with differential generator
Probe is field scan device, and host computer realizes the motion control to slave computer by Bluetooth wireless communication, so that field scan
System can complete high-precision, quick field scan on the surface of tested sample, and can be in LCD and host computer real-time display
Field waveform figure.
2, the utility model uses differential arrangement Hall sensor, and main there are two advantages: (1) differential output mode can be with
The reference voltage of offset sensor zero point, so that being quite 0V to zero point, measurement result is more accurate.(2) differential fashion is arranged
Hall sensor makes the drift of output signal small, simultaneously effective reduces because of temperature brought by test variation of ambient temperature
Error.
3, the slave computer of the utility model and between computer or mobile phone use blue tooth wireless communication, avoid electromagnetic interference
Bring measurement error effectively increases the accuracy of systematic survey.
4, the utility model is matched using ARM microcontroller and host computer, have stronger data-handling capacity and compared with
Good real-time characteristic, is capable of the measurement result in instant playback magnetic field.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the structural schematic diagram of three-dimension sensor probe in Fig. 1.
Fig. 3 is the circuit diagram of the utility model.
Fig. 4 is the circuit diagram of controller ARM in Fig. 3.
Fig. 5 is the circuit diagram of bluetooth module in Fig. 3.
Specific embodiment
The utility model is further described with reference to the accompanying drawings and examples.
As shown in Figure 1, a kind of digital magnetic field scanned imagery device, including pedestal 6, objective table 3, kinematic mount frame 10,
Three-dimension sensor probe 1, power module 4, LCD display 5, Y direction sliding rail 7, X-direction sliding rail 8, Z-direction sliding rail 9,
Slave computer 2, the pedestal 6 use all aluminium alloy structure, are equipped with Y direction sliding rail 7 and power module 4, power module in pedestal 6
4 provide working power for whole device, and pedestal 6 is equipped with objective table 3, and objective table 3 is slidably arranged on Y direction sliding rail 7,
The kinematic mount frame 10 is located at 3 top of objective table, and 10 bottom of kinematic mount frame is fixed on pedestal 6, and 10 liang of kinematic mount frame
Side is symmetrical arranged two Z-direction sliding rails 9, and 3 upper horizontal of objective table is equipped with X-direction sliding rail 8, X-direction sliding rail 8
Both ends are equipped with pedestal II 12, and pedestal II 12 is slidably arranged on two Z-direction sliding rails 9, on X-direction sliding rail 8 slidably
Pedestal I 11 is set, and the three-dimension sensor probe 1 is fixedly mounted on pedestal I 11, detects tested sample in tri- sides X, Y, Z
To magnetic field strength；The kinematic mount frame 10 is equipped with slave computer 2, the signal output end of three-dimension sensor probe 1 and bottom
Machine 2 is connected.The pedestal I 11 is equipped with the X-direction servo electricity for driving pedestal I 11 to slide on X-direction sliding rail 8
Machine, the pedestal II 12 are equipped with the Z-direction servo motor for driving pedestal II 12 to slide on Z-direction sliding rail 9.
As shown in Fig. 2, the three-dimension sensor probe 1 is used for the acquisition of three-dimensional magnetic field data, it is linear using A3515 Surface Mount
Hall sensor 13 is used as Magnetic Sensor, and the matrix of three-dimension sensor probe 1 is 6mm × 6mm × 6mm regular hexahedron, matrix
Upper to be arranged symmetrically 6 Surface Mount linear hall sensors 13 using differential, every two Surface Mount linear hall sensor 13 is one group, one
Forward one-reverse is affixed on respectively on the opposite face of regular hexahedron, the mutually arrangement in 90 ° of Surface Mount linear hall sensor 13 of each dimension,
It is symmetrical on the X, Y, Z axis line of three-dimension sensor probe 1, it is equidistant with O point；The Surface Mount linear hall sensor 13 being in pair
It is reversed back to placement, and up and down, to guarantee that two Surface Mount linear hall sensors 13 export just reversed, differential output, i.e.,
Sensor measurement output is the sum of two Surface Mount linear hall sensors 13.
The objective table 3 is made of upper layer and lower layer, is fixed between upper and lower level by Spring screws；3 upper layer of objective table is aluminium
System is permanent magnet or conductive material for placing tested sample, tested sample without magnetic sheet, and tested sample is placed when being permanent magnet
Magnetic-field measurement is directly carried out in objective table 3, adds constant current at the both ends of tested sample when being the conductive material material of non-permanent magnet
Source；3 lower layer of objective table is that aluminum without magnetic sheet and is equipped with sliding block and Y direction servo drive motor, in Y direction servo motor
Driving under, objective table 3 moves on Y direction sliding rail 7.
As shown in figure 3, the slave computer 2 include signal conditioning circuit, A/D conversion circuit, controller, watchdog circuit,
The input terminal of bluetooth module and buffer area, the signal conditioning circuit is connected with the output end of three-dimension sensor probe 1, signal tune
The output end of reason circuit is connected with the input terminal of A/D conversion circuit, and the output end of A/D conversion circuit is connected with controller, pedestal 6
It is equipped with LCD display 5, controller connects with watchdog circuit, bluetooth module, buffer area, LCD display 5, EEPROM respectively
It connects, conditioning amplifying circuit is sent into A/D conversion circuit, A/ after the electric signal of 1 output of three-dimension sensor probe is filtered, is amplified
D conversion circuit converts the electrical signal to input controller after digital signal, and signal is transported to by controller by bluetooth module
In the machine of position.
As shown in figure 4, the controller uses ST Microelectronics ARM chip STM32F103, STM32F103 to use
Variable static storage controller (FSMC) and A/D conversion circuit interactive information realize the processing to digital signal；STM32F103
Information is sent to buffer area by direct memory access mode (DMA), by serial line interface (SPI) and watchdog circuit, is deposited
Reservoir EEPROM communication.STM32F103 shows magnetic field data by LCD display 5, and using bluetooth module and host computer into
Row wireless telecommunications.
As shown in figure 5, the bluetooth module uses HC-05 wireless blue tooth module, for short distance and point-to-point wireless
Data transmission and reception, communication distance are 10 meters, and bluetooth module can realize blue tooth wireless communication with computer or mobile phone, by magnetic
Field measurement data are transferred on computer or mobile phone, and real-time monitoring is tested magnetic field strength.Between the bluetooth module and slave computer 2
Using serial communication, the VCC pin of bluetooth module connects 3.3V power supply, GND pin ground connection, TXD pin and the RXD pipe of bluetooth module
Foot is separately connected the serial input pin and serial input pin of controller, the KEY pin and LED pipe foot configured on bluetooth module
It is all connected to the parallel I/O pin of controller, the LED pipe foot of bluetooth module is connected to the parallel I/O pin of controller, for monitoring indigo plant
The pairing state of tooth module, when input is high level, LED is bright, illustrates successful matching, and when input is low level, LED does not work,
Illustrate pairing failure.
It should be noted that content described in specific embodiment is one embodiment of the application, do not departing from
The modification that is carried out all should belong to the protection range of the utility model under the premise of the utility model in essence spirit, such as by Hall
The magnetoresistive sensor of sensor 13, electromagnetic sensor and magneto-optical sensor replace；By the other short-distance wireless of bluetooth module
The communication technology replaces, such as ZigBee technology, WLAN (Wi-Fi) technology and GPS technology etc..
Claims (10)
1. a kind of digital magnetic field scanned imagery device, it is characterised in that: including pedestal, objective table, kinematic mount frame, three-dimensional biography
Sensor probe, power module, Y direction sliding rail, X-direction sliding rail, Z-direction sliding rail, the interior Y direction that is equipped with of the pedestal are slided
Rail and power module, power module provide working power for whole device, and pedestal is equipped with objective table, and objective table is slidably arranged
On Y direction sliding rail, the kinematic mount frame is located above objective table, and kinematic mount frame bottom is fixed on the base, and moves
Support frame two sides are symmetrical arranged two Z-direction sliding rails, and the objective table upper horizontal is equipped with X-direction sliding rail, and X-direction is sliding
The both ends of rail are equipped with pedestal II, and pedestal II is slidably arranged on two Z-direction sliding rails, slidably sets on X-direction sliding rail
Pedestal I is set, the three-dimension sensor probe is fixedly mounted on pedestal I, and the kinematic mount frame is equipped with slave computer, and three-dimensional passes
The signal output end of sensor probe is connected with slave computer.
2. digital magnetic field scanned imagery device according to claim 1, it is characterised in that: the three-dimension sensor probe
For the acquisition of three-dimensional magnetic field data, using A3515 Surface Mount linear hall sensor as Magnetic Sensor, three-dimension sensor probe
Matrix be regular hexahedron, be arranged symmetrically 6 Surface Mount linear hall sensors using differential on matrix, every two Surface Mount is linearly suddenly
Your sensor is one group, and a positive and a negative is affixed on respectively on the opposite face of regular hexahedron, the Surface Mount linear Hall sensing of each dimension
Device mutually arrangement in 90 °, it is symmetrical on the X, Y, Z axis line of three-dimension sensor probe, it is equidistant with O point；The Surface Mount being in pair
Linear hall sensor is reversed back to placement, and up and down, thus guarantee that two Surface Mount linear hall sensor outputs are just reversed,
The output of differential output, i.e. sensor measurement is the sum of two Surface Mount linear hall sensors.
3. digital magnetic field scanned imagery device according to claim 1, it is characterised in that: the objective table is by upper and lower two
Layer is constituted, and is fixed between upper and lower level by Spring screws；Objective table upper layer is that aluminum is used to place tested sample without magnetic sheet；Loading
Platform lower layer is that aluminum without magnetic sheet and is equipped with sliding block and Y direction servo drive motor, in the driving of Y direction servo motor
Under, objective table moves on Y direction sliding rail.
4. digital magnetic field scanned imagery device according to claim 1, it is characterised in that: the slave computer includes signal
Conditioning circuit, A/D conversion circuit, controller, watchdog circuit, bluetooth module and buffer area, the signal conditioning circuit it is defeated
Enter end and is connected with the output end that three-dimension sensor is popped one's head in, the input terminal phase of the output end and A/D conversion circuit of signal conditioning circuit
Even, the output end of A/D conversion circuit is connected with controller, and controller connects with watchdog circuit, bluetooth module, buffer area respectively
It connects, conditioning amplifying circuit is sent into A/D conversion circuit, A/D after the electric signal of three-dimension sensor probe output is filtered, is amplified
Conversion circuit converts the electrical signal to input controller after digital signal, and signal is transported to upper by controller by bluetooth module
In machine.
5. digital magnetic field scanned imagery device according to claim 4, it is characterised in that: the controller uses meaning method
Semiconductor company ARM chip STM32F103, STM32F103 interact letter with A/D conversion circuit using variable static storage controller
Breath realizes the processing to digital signal；Information is sent to buffer area by direct memory access mode by STM32F103, is passed through
Serial line interface is communicated with watchdog circuit, memory.
6. digital magnetic field scanned imagery device according to claim 3, it is characterised in that: tested sample be permanent magnet or
Person's conductive material, tested sample is placed in objective table and directly carries out magnetic-field measurement when being permanent magnet, is the conduction material of non-permanent magnet
Expect to add constant-current source at the both ends of tested sample when material.
7. digital magnetic field scanned imagery device according to claim 3, it is characterised in that: the pedestal I, which is equipped with, to be used
In the X-direction servo motor that driving pedestal I slides on X-direction sliding rail, the pedestal II is equipped with for driving X-axis side
The Z-direction servo motor slided on Z-direction sliding rail to the pedestal II at sliding rail both ends.
8. digital magnetic field scanned imagery device according to claim 5, it is characterised in that: the bluetooth module uses
HC-05 wireless blue tooth module, for short distance and point-to-point wireless data transmission and reception, communication distance is 10 meters, described
Serial communication is used between bluetooth module and slave computer, the VCC pin of bluetooth module connects 3.3V power supply, GND pin ground connection, bluetooth
The TXD pin and RXD pin of module are separately connected the serial input pin and serial input pin of controller, match on bluetooth module
The KEY pin and LED pipe foot set are all connected to the parallel I/O pin of controller, and the LED pipe foot of bluetooth module is connected to controller
Parallel I/O pin, for monitoring the pairing state of bluetooth module, when input is high level, LED is bright, illustrates successful matching, when defeated
LED does not work when entering for low level, illustrates pairing failure.
9. digital magnetic field scanned imagery device according to claim 5, it is characterised in that: the pedestal is closed using full aluminium
Golden structure.
10. digital magnetic field scanned imagery device according to claim 5, it is characterised in that: the pedestal is equipped with LCD
Display screen, LCD display are connect with slave computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821728528.0U CN208984788U (en) | 2018-10-24 | 2018-10-24 | A kind of digital magnetic field scanned imagery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821728528.0U CN208984788U (en) | 2018-10-24 | 2018-10-24 | A kind of digital magnetic field scanned imagery device |
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| Publication Number | Publication Date |
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| CN208984788U true CN208984788U (en) | 2019-06-14 |
Family
ID=66788768
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821728528.0U Expired - Fee Related CN208984788U (en) | 2018-10-24 | 2018-10-24 | A kind of digital magnetic field scanned imagery device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111537926A (en) * | 2020-05-20 | 2020-08-14 | 河北工业大学 | Measuring system and measuring method suitable for multi-scene space magnetic field |
| CN112698111A (en) * | 2020-12-14 | 2021-04-23 | 佛山科学技术学院 | Movable three-dimensional electromagnetic field measuring device |
| CN113030594A (en) * | 2021-03-24 | 2021-06-25 | 中国舰船研究设计中心 | Electromagnetic field two-dimensional distribution measuring device |
| CN113805126A (en) * | 2021-10-09 | 2021-12-17 | 深圳市资福医疗技术有限公司 | Magnetic field measuring device |
| CN113805126B (en) * | 2021-10-09 | 2024-06-28 | 深圳市资福医疗技术有限公司 | Magnetic field measuring device |
-
2018
- 2018-10-24 CN CN201821728528.0U patent/CN208984788U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111537926A (en) * | 2020-05-20 | 2020-08-14 | 河北工业大学 | Measuring system and measuring method suitable for multi-scene space magnetic field |
| CN111537926B (en) * | 2020-05-20 | 2022-05-17 | 河北工业大学 | Measuring system and measuring method suitable for multi-scene space magnetic field |
| CN112698111A (en) * | 2020-12-14 | 2021-04-23 | 佛山科学技术学院 | Movable three-dimensional electromagnetic field measuring device |
| CN112698111B (en) * | 2020-12-14 | 2023-09-26 | 佛山科学技术学院 | Movable three-dimensional electromagnetic field measuring device |
| CN113030594A (en) * | 2021-03-24 | 2021-06-25 | 中国舰船研究设计中心 | Electromagnetic field two-dimensional distribution measuring device |
| CN113805126A (en) * | 2021-10-09 | 2021-12-17 | 深圳市资福医疗技术有限公司 | Magnetic field measuring device |
| CN113805126B (en) * | 2021-10-09 | 2024-06-28 | 深圳市资福医疗技术有限公司 | Magnetic field measuring device |
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| CF01 | Termination of patent right due to non-payment of annual fee |