CN108548546B - Back magnetic Hall device combined support, magnetic steel mounting device and mounting method - Google Patents
Back magnetic Hall device combined support, magnetic steel mounting device and mounting method Download PDFInfo
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- CN108548546B CN108548546B CN201810332650.4A CN201810332650A CN108548546B CN 108548546 B CN108548546 B CN 108548546B CN 201810332650 A CN201810332650 A CN 201810332650A CN 108548546 B CN108548546 B CN 108548546B
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- magnetic steel
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- clamp
- upper cover
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
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- Engineering & Computer Science (AREA)
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- Measuring Magnetic Variables (AREA)
- Hall/Mr Elements (AREA)
Abstract
The invention discloses a back magnetic Hall device combined bracket, a magnetic steel mounting device and a mounting method, and relates to the technical field of sensors. The method comprises the following steps: the fixing device comprises a fixing frame, a fixing device and a control device, wherein a fixing cavity is arranged on one side of the fixing frame and used for mounting a Hall device; a groove with an opening at one end is formed between the fixing cavity and the body of the fixing frame, the groove is used for mounting permanent magnet steel, and a hook for preventing the permanent magnet steel from falling off is arranged in the groove; the fixing frame is used for fixing the electronic circuit, and the Hall device is fixedly connected with the electronic circuit. The Hall device and the magnetic steel are effectively fixed and are located at respective positions, so that reliable connection is realized, separation and falling are avoided, and the precision of the sensor is ensured. And this application adopts sectional shelf direct mount hall device, electronic circuit and magnet steel, is different from traditional injection structure, simple structure, occupation space are little, convenient to use.
Description
Technical Field
The invention relates to the technical field of sensors, in particular to a back magnetic Hall device combined support, a magnetic steel mounting device and a magnetic steel mounting method.
Background
Hall chip is independent separately with the magnet steel when using in the existing market, mainly by following two kinds of modes during production: firstly, hall chip moulds plastics in an organic whole with the magnet steel, and this scheme main defect is in the actual production of moulding plastics, because of not fixed between hall device and injection mold, so hall device can take place the displacement along with the plastics of injecting into, and then influences the precision of the sensor of producing. And the process control difficulty is high, and the production efficiency is low. Secondly, the Hall device and the magnetic steel are bonded into a whole by strong glue. The main defects of the scheme are that the magnetic steel and the Hall device are difficult to paste in the middle, the magnetic steel and the Hall device are easy to generate gaps, the magnetic steel and the Hall device have low vibration resistance grade and are easy to separate from each other, and then the phenomenon that output signals of produced products are unstable is caused, and the product performance is seriously influenced.
In view of this, the present application is presented.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a back magnetic type Hall device combined support, a magnetic steel mounting device and a mounting method, wherein the Hall chip and the magnetic steel are accurately mounted and are not easy to fall off in connection.
In a first aspect, the present invention provides a back magnetic hall device assembly, including: a fixed frame is arranged on the upper portion of the frame,
one side of the fixed frame is provided with a fixed cavity, and the fixed cavity is used for mounting a Hall device;
a groove with an opening at one end is formed between the fixing cavity and the body of the fixing frame, the groove is used for mounting permanent magnet steel, and a hook for preventing the permanent magnet steel from falling off is arranged in the groove;
the fixing frame is used for fixing the electronic circuit, and the Hall device is fixedly connected with the electronic circuit.
According to the back magnetic type Hall device combined support, the Hall device, the electronic circuit and the magnetic steel are fixed together in order by arranging the fixing frame, and the Hall device and the magnetic steel are both provided with specific fixing positions such as the fixing cavity and the groove, so that the Hall device cannot be displaced along with injected plastic, and the relative accuracy is high. The Hall device is positioned in the specific fixing cavity, and a hook is also arranged in the groove where the magnetic steel is positioned, so that the magnetic steel is not easy to fall off; the Hall device and the magnetic steel are effectively fixed and are located at respective positions, so that reliable connection is realized, separation and falling are avoided, and the precision of the sensor is ensured. And this application adopts sectional shelf direct mount hall device, electronic circuit and magnet steel, is different from traditional injection structure, simple structure, occupation space are little, convenient to use.
Furthermore, a caliper is arranged on the bracket at the other side of the fixing frame,
a step structure is arranged on one side of the inner cavity of the fixing frame close to the groove,
one side of the electronic circuit is located at the step structure, and the other side of the electronic circuit is fixed on the fixing frame through the calipers.
Furthermore, a positioning column is arranged in the inner cavity of the fixing frame, a positioning hole is formed in the electronic circuit, and the positioning hole is used for being tightly matched with the positioning column.
Furthermore, the electronic circuit is provided with a welding hole, and one end of the Hall device is welded at the welding hole.
Further, the fixing frame is made of 70% of PA66 material and 30% of fibers.
In a second aspect, the present invention provides a magnetic steel mounting apparatus for a back magnetic hall device assembly bracket, including:
the clamp upper cover is provided with a clamp ejector rod;
the enclosing frame is used for connecting the clamp base and the clamp upper cover, and the clamp upper cover can be opened upwards along the axial direction of the enclosing frame;
the loading device is arranged on the clamp base and is positioned between the clamp base and the clamp upper cover;
the loading device comprises a magnetic steel loading device and a mounting hole, the magnetic steel loading device is used for storing magnetic steel to be installed, and the mounting hole is used for storing any one of the combined supports.
Further, enclose the frame and constitute by four linear parallel guide rails, linear parallel guide rail's bottom is fixed in on the anchor clamps base, linear parallel guide rail's upper end is worn out by the anchor clamps upper cover.
Further, still include: the error-proof device is arranged on the loading device and positioned on the back of the magnetic steel loading device, and an error-correcting magnetic steel is arranged in the error-proof device.
In a third aspect, the present invention provides a magnetic steel mounting method, including the following steps:
s1, magnetic steel to be installed is installed in the magnetic steel installation device for standby;
s2 opening the clamp upper cover, fitting the combination bracket into the mounting hole such that the opening direction of the groove faces the clamp upper cover;
s3, closing the upper cover of the clamp, and pressing the magnetic steel to be installed into the groove by the clamp ejector rod;
s4, opening the upper cover of the clamp, and taking out the combined bracket with the magnetic steel installed.
Further, step S1 further includes:
an error correction magnetic steel with the same polarity as that of the magnetic steel to be installed is installed in the error-proof device,
and the magnetic steel is arranged in the magnetic steel arranging device to be arranged, and if the magnetic steel to be arranged is popped up, the direction of the magnetic steel to be arranged is changed, and the magnetic steel is arranged for standby again.
The invention provides a magnetic steel mounting device and a magnetic steel mounting method of a back magnetic Hall device combined support, which are matched with the combined support for use, are convenient for the stable mounting of the magnetic steel in the combined support, can mount the magnetic steel quickly, conveniently and efficiently, and ensure the specific mounting positions of a Hall device and the magnetic steel, thereby ensuring the precision of a sensor. Meanwhile, the matching device has the advantages of less relative production processes, extremely high consistency and high production efficiency; the two devices have simple structure, easy manufacture and low cost, and are suitable for mass production.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a schematic structural diagram of a hall device assembly bracket according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a magnetic steel mounting device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another side surface of the magnetic steel mounting device according to an embodiment of the present invention;
reference numerals:
1-Hall device
2-permanent magnet steel
3-combined support
31-fixed mount
32-fixed chamber
33-groove
34-step structure
35-caliper
36-positioning column
4-electronic circuit
10-Linear parallel guide
20-Clamp Upper cover
30-magnetic steel loading device
40-clamp base
50-clamp ejector rod
60-error proofing device
70-mounting hole
Detailed Description
The technical solution of the present invention will be described in detail with reference to specific embodiments. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
An embodiment of the present invention provides a back magnetic hall device assembly support, including: the fixing device comprises a fixing frame 31, wherein a fixing cavity 32 is formed in one side of the fixing frame 31, and the fixing cavity 32 is used for mounting the Hall device 1; a groove 33 with an opening at one end is formed between the fixing cavity 32 and the body of the fixing frame 31, the groove 33 is used for installing the permanent magnet steel 2, and a hook for preventing the permanent magnet steel 2 from falling off is arranged in the groove 33; the fixing frame 31 is used for fixing the electronic circuit 4, and the hall device 1 is fixedly connected with the electronic circuit 4. According to the back magnetic type Hall device 1 combined bracket 3 provided by the invention, the Hall device 1, the electronic circuit 4 and the magnetic steel are sequentially fixed together by arranging the fixing frame 31, and the Hall device 1 and the magnetic steel are both provided with specific fixing positions such as the fixing cavity 32 and the groove 33, so that the Hall device 1 cannot be displaced along with injected plastics, and the relative precision is high. The Hall device 1 is positioned in the specific fixed cavity 32, a hook is further arranged in the groove 33 where the magnetic steel is positioned, and the hook hooks the magnetic steel, so that the magnetic steel is not easy to fall off; hall device 1, magnet steel are all effectively fixed, and the two all are located position separately, and reliable connection does not separate and does not drop, guarantees sensor precision. And this application adopts sectional shelf 3 direct mount hall device 1, electronic circuit 4 and magnet steel, is different from traditional injection structure, simple structure, occupation space are little, convenient to use. The permanent magnet steel 2 is used for providing a static magnetic field.
In order to more stably fix the electronic circuit 4, as shown in fig. 1, in the back magnetic hall device assembly bracket according to an embodiment of the present invention, a caliper 35 is disposed on the bracket on the other side of the fixing frame 31, a step structure 34 is disposed on one side of the inner cavity of the fixing frame 31 close to the groove 33, one side of the electronic circuit 4 is located at the step structure 34, and the other side of the electronic circuit 4 is fixed on the fixing frame 31 through the caliper 35.
In addition to the fastening by the caliper 35, in the back magnetic hall device 1 assembly 3 according to an embodiment of the present invention, as shown in fig. 1, a positioning column 36 is disposed in an inner cavity of the fixing frame 31, and a positioning hole is disposed on the electronic circuit 4, and the positioning hole is used for tightly fitting with the positioning column 36. The double fixation of the caliper 35 and the positioning column 36 can firmly and reliably fix the electronic circuit 4 fixed with the hall device 1 on the combined bracket 3.
In order to match the structure of the combined bracket 3, as shown in fig. 1, in the back magnetic hall device combined bracket according to an embodiment of the present invention, a welding hole is formed in the electronic circuit 4, and one end of the hall device 1 is welded to the welding hole. In this embodiment, in order to facilitate the installation, the hall element is first inserted into the welding hole of the electronic circuit 4, and after welding, the hall element is put into a forming tool, and is folded into the shape shown in fig. 1, so as to effectively fit the structure of the combined bracket 3.
According to the back magnetic Hall device combined support provided by the embodiment of the invention, the fixing frame 31 is formed by injection molding of 70% of PA66 material and 30% of fiber, and has the advantages of high temperature resistance, strong toughness, high consistency and the like; meanwhile, reliable connection among the Hall device 1, the magnetic steel and the electronic circuit 4 board is guaranteed, and the Hall device, the magnetic steel and the electronic circuit are not easy to fall off.
Another embodiment of the present invention provides a magnetic steel mounting apparatus for a back magnetic hall device assembly bracket, including: the clamp comprises a clamp upper cover 20, wherein a clamp ejector rod 50 is arranged on the clamp upper cover 20; a surrounding frame for connecting the clamp base 40 and the clamp upper cover 20, wherein the clamp upper cover 20 can be opened upwards along the axial direction of the surrounding frame; the loading device is arranged on the clamp base 40 and is positioned between the clamp base 40 and the clamp upper cover 20; the loading device comprises a magnetic steel loading device 30 and a mounting hole 70, the magnetic steel loading device 30 is used for storing magnetic steel to be installed, and the mounting hole 70 is used for storing any one of the combined supports 3. The upper clamp cover 20 is lifted upwards to place the combined support 3 into the mounting hole 70, the upper clamp cover 20 is pressed downwards to press the magnetic steel into the groove 33 through the clamp ejector rod 50, then the upper clamp cover 20 is lifted upwards to take out the combined support 3, the permanent magnet magnetic steel 2 and the Hall device 1 are centered and have no gap between the permanent magnet magnetic steel and the Hall device 1 through the combined support 3, and the Hall element, the magnetic steel and the electronic circuit 4(PCB) are effectively and reliably connected without falling off.
As shown in fig. 2 to 3, in the magnetic steel mounting device of the back magnetic hall device assembly bracket according to an embodiment of the present invention, the enclosure frame is composed of four linear parallel guide rails 10, the bottom ends of the linear parallel guide rails 10 are fixed on the fixture base 40, and the upper ends of the linear parallel guide rails 10 are penetrated out by the fixture upper cover 20. Fixing the clamp base 40 on the workbench, lifting the clamp upper cover 20 upwards along the vertical direction of the linear parallel guide rail 10, putting the combined support 3 into the mounting hole 70, pressing down the clamp ejector rod 50 to press the magnetic steel into the combined support 3, upwards opening the clamp upper cover 20, taking out the combined support 3, and finishing the magnetic steel loading process.
In order to ensure the correctness of the polarity when the magnetic steel is installed, the magnetic steel installation device of the back magnetic hall device combination bracket provided by an embodiment of the invention further comprises: the error-proof device 60 is arranged on the loading device and is positioned on the back surface of the magnetic steel loading device 30, and an error-correcting magnetic steel is arranged in the error-proof device 60. The error correction magnetic steel is used for being the same with the polarity of one side that waits to install the magnetic steel and the certain end polarity of waiting to install the magnetic steel, is convenient for judge whether the installation is correct. When the magnetic steel to be installed is installed, if the magnetic steel is bounced off, the installation direction is proved to be incorrect; and (5) converting the direction, and starting to install from the other end of the magnetic steel to be installed. The magnetic steel mounting device is provided with an error-proofing function, and the correctness of the polarity of the mounted magnetic steel is guaranteed.
Another embodiment of the present invention provides a magnetic steel mounting method, including the following steps:
s1, magnetic steel to be installed is installed in the magnetic steel installation device 30 for standby;
s2 opening the clip upper cover 20, fitting the assembly bracket 3 into the mounting hole 70 so that the opening direction of the recess 33 faces the clip upper cover 20;
s3, closing the clamp upper cover 20, and pressing the magnetic steel to be installed into the groove 33 by the clamp ejector rod 50;
s4, opening the clamp upper cover 20, and taking out the combined bracket 3 with the magnetic steel installed.
Further, step S1 further includes: the error correction magnetic steel with the same polarity as that of the magnetic steel to be installed is installed into the error prevention device 60, the magnetic steel to be installed is installed into the magnetic steel installation device 30, and if the magnetic steel to be installed is popped up, the direction of the magnetic steel to be installed is changed, and the magnetic steel to be installed is installed again for later use.
The invention provides a magnetic steel mounting device and a magnetic steel mounting method of a back magnetic Hall device combined bracket, which are matched with a combined bracket 3 for use, so that the magnetic steel in the combined bracket 3 can be conveniently and stably mounted, the specific mounting positions of a Hall device 1 and the magnetic steel are ensured, and the precision of a sensor is further ensured. Meanwhile, the matching device has the advantages of less relative production processes, extremely high consistency and high production efficiency; the two devices have simple structure, easy manufacture and low cost, and are suitable for mass production.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description of the present invention, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some embodiments, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (9)
1. Magnet steel installation device, its characterized in that includes:
a clamp upper cover, a clamp ejector rod is arranged on the clamp upper cover,
the enclosing frame is used for connecting the clamp base and the clamp upper cover, and the clamp upper cover can be opened upwards along the axial direction of the enclosing frame;
the loading device is arranged on the clamp base and is positioned between the clamp base and the clamp upper cover;
the mounting device comprises a magnetic steel mounting device and a mounting hole, the magnetic steel mounting device is used for storing magnetic steel to be mounted, and the mounting hole is used for storing the combined support;
the sectional shelf-unit includes: a fixed frame is arranged on the upper portion of the frame,
one side of the fixed frame is provided with a fixed cavity, and the fixed cavity is used for mounting a Hall device;
a groove with an opening at one end is formed between the fixing cavity and the body of the fixing frame, the groove is used for mounting permanent magnet steel, and a hook for preventing the permanent magnet steel from falling off is arranged in the groove;
the fixing frame is used for fixing the electronic circuit, and the Hall device is fixedly connected with the electronic circuit.
2. A magnetic steel mounting device according to claim 1,
the bracket at the other side of the fixed frame is provided with calipers,
a step structure is arranged on one side of the inner cavity of the fixing frame close to the groove,
one side of the electronic circuit is located at the step structure, and the other side of the electronic circuit is fixed on the fixing frame through the calipers.
3. A magnetic steel mounting device according to claim 2, wherein the fixing frame has a positioning column disposed in an inner cavity thereof, and the electronic circuit has a positioning hole disposed therein, the positioning hole being adapted to be tightly fitted with the positioning column.
4. A magnetic steel mounting device according to claim 1, wherein the electronic circuit is provided with a welding hole, and one end of the hall device is welded to the welding hole.
5. A magnetic steel mounting arrangement as claimed in claim 1, in which the mounting is made from 70% PA66 material and 30% fibre.
6. A magnetic steel mounting device according to claim 1, wherein the enclosure frame is composed of four linear parallel guide rails, bottom ends of the linear parallel guide rails are fixed on the clamp base, and upper ends of the linear parallel guide rails are penetrated out by the clamp upper cover.
7. A magnetic steel mounting device according to claim 1, further comprising: the error-proof device is arranged on the loading device and positioned on the back of the magnetic steel loading device, and an error-correcting magnetic steel is arranged in the error-proof device.
8. A magnetic steel mounting method, characterized in that the method employs the magnetic steel mounting apparatus of claim 1, comprising the steps of:
s1, magnetic steel to be installed is installed in the magnetic steel installation device for standby;
s2 opening the clamp upper cover, fitting the combination bracket into the mounting hole such that the opening direction of the groove faces the clamp upper cover;
s3, closing the upper cover of the clamp, and pressing the magnetic steel to be installed into the groove by the clamp ejector rod;
s4, opening the upper cover of the clamp, and taking out the combined bracket with the magnetic steel installed.
9. A magnetic steel mounting method according to claim 8, wherein the magnetic steel mounting device further comprises: the error-proof device is arranged on the loading device and is positioned on the back of the magnetic steel loading device, and an error-correcting magnetic steel is arranged in the error-proof device;
step S1 further includes:
the error correction magnetic steel is arranged in the error-proof device,
the magnetic steel is installed in the magnetic steel installation device to be installed with the magnetic steel, and if the magnetic steel to be installed is popped up, the direction of the magnetic steel to be installed is changed, and the magnetic steel is installed again for standby.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810332650.4A CN108548546B (en) | 2018-04-13 | 2018-04-13 | Back magnetic Hall device combined support, magnetic steel mounting device and mounting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810332650.4A CN108548546B (en) | 2018-04-13 | 2018-04-13 | Back magnetic Hall device combined support, magnetic steel mounting device and mounting method |
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| CN108548546A CN108548546A (en) | 2018-09-18 |
| CN108548546B true CN108548546B (en) | 2020-08-28 |
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| CN109973785B (en) * | 2019-04-12 | 2020-05-15 | 中国科学院长春光学精密机械与物理研究所 | Hall device positioning device |
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| CN108548546A (en) | 2018-09-18 |
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