CN218727948U - Magnetic force value detection device - Google Patents
Magnetic force value detection device Download PDFInfo
- Publication number
- CN218727948U CN218727948U CN202223030620.9U CN202223030620U CN218727948U CN 218727948 U CN218727948 U CN 218727948U CN 202223030620 U CN202223030620 U CN 202223030620U CN 218727948 U CN218727948 U CN 218727948U
- Authority
- CN
- China
- Prior art keywords
- magnetic
- ring
- magnetic force
- force value
- magnetic ring
- 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.)
- Active
Links
Images
Landscapes
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The utility model discloses a magnetic force value detection device relates to magnetic field detection technical field. The magnetic force value detection device is installed on the rotating shaft and comprises: a vertical magnetic circuit unit and a magnetic force measuring unit; the vertical magnetic loop unit comprises a first magnetic ring and a second magnetic ring; the first magnetic ring and the second magnetic ring are sleeved on the rotating shaft from top to bottom; a space is arranged between the first magnetic ring and the second magnetic ring; the S pole of the first magnetic ring is opposite to the N pole of the second magnetic ring; the magnetic force measuring unit is used for measuring the magnetic force value generated by the vertical magnetic loop unit. The utility model discloses a two magnetic ring designs from top to bottom, changes original magnetic field return circuit, makes the plane magnetic circuit among the prior art become perpendicular magnetic circuit to the magnetic circuit that makes to detect is more stable, and upper and lower magnetic ring sets up the position nearer, and upper and lower magnetic ring magnetism is felt the line and can be preferred to form closed magnetic circuit, avoids magnetism to be felt the line by a wide margin and leaks, has reduced the influence to other magnetic encoder of group, has improved magnetic encoder to the stability and the accuracy that magnetic force value detected.
Description
Technical Field
The utility model relates to a magnetic field detects technical field, especially relates to a magnetic force value detection device.
Background
The magnetic sensor is a device for detecting a corresponding physical quantity by converting a change in magnetic property of a sensitive element caused by an external factor such as a magnetic field, a current, a stress strain, a temperature, a light, etc. into an electric signal. The magnetic sensor has wide application, plays an important role in the fields of national economy, national defense construction, scientific technology, medical treatment and health and the like, and becomes a main branch of the modern sensor industry. Plays an increasingly important role in various aspects such as traditional industrial application and modification, resource exploration and comprehensive utilization, environmental protection, bioengineering, traffic intelligent control and the like.
In order to measure as high an angle precision value as possible, a magnetic ring-magnetic encoder combination which is magnetized in the radial direction is mostly used in automation, and the basic principle is as follows: because the magnetic force values at the periphery of the magnetic ring are inconsistent, when the magnetic ring rotates, the magnetic force values obtained by the magnetic encoder are inconsistent, the angle is calibrated and calculated according to the magnitude and the direction of the magnetic force values, and the corresponding relation or the corresponding curve of the rotating shaft angle and the magnetic encoder is obtained, so that the corresponding rotating shaft angle is obtained according to the value of the magnetic encoder when the magnetic encoder is used, and the angle measurement precision is influenced by the minimum value of the Hall sensing precision and the angle rotation precision during calibration.
However, the magnetic encoder in the prior art is easy to cause the change of the magnetic field, so that the step of the magnetic force value occurs, and the correct angle cannot be calculated through the numerical value measured by the magnetic encoder. When a plurality of non-fixed magnetic ring-magnetic encoder combinations are combined in one set of equipment, sometimes, due to compact structural design and mutual interference of the combinations, the magnetic encoder hall acquires the magnetic force value of the magnetic ring combined by the magnetic encoder hall and the magnetic force values of the magnetic rings combined by other combinations, and because the angles of the other magnetic rings are also changed, even if the relative angle between the magnetic ring (shaft) of the set and the magnetic encoder hall is not changed, the magnetic force value output by the hall is changed, so that the angle measurement is inaccurate, and the angle output precision is influenced. In addition, due to the influence of an external environment magnetic field, the magnetic values acquired by all the Hall sensors are subjected to overall offset, when the equipment is changed in a use place, the magnetic encoder needs to be calibrated again, and meanwhile, the magnetic encoder is required to be noticed not to have large-scale magnetic conductor displacement (such as a vehicle and a three-wheel iron sheet) within a certain distance range during use and is required to be far away from an electromagnetic or permanent magnetic scene as far as possible. Therefore, the stability and accuracy of the magnetic force values detected by the magnetic encoder in the related art are not high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a magnetic force value detection device can improve magnetic encoder and to the stability and the accuracy that magnetic force value detected.
In order to achieve the above object, the utility model provides a magnetic force value detection device installs on the rotation axis, magnetic force value detection device includes: a vertical magnetic circuit unit and a magnetic force measuring unit; the vertical magnetic loop unit comprises a first magnetic loop and a second magnetic loop;
the first magnetic ring and the second magnetic ring are sleeved on the rotating shaft from top to bottom; a space is arranged between the first magnetic ring and the second magnetic ring; the S pole of the first magnetic ring is opposite to the N pole of the second magnetic ring; the magnetic force measuring unit is used for measuring the magnetic force value generated by the vertical magnetic loop unit.
Optionally, the method further comprises: a non-conductive magnet spacer ring; the non-magnetic-conductive spacer ring is sleeved on the rotating shaft and is positioned at the interval between the first magnetic ring and the second magnetic ring.
Optionally, the magnetic force measuring unit comprises at least one pair of magnetic encoders; each pair of the magnetic encoders includes: a first magnetic encoder and a second magnetic encoder;
the first magnetic encoder is used for measuring a magnetic force value of the first magnetic circuit; the second magnetic encoder is used for measuring a magnetic force value of the second magnetic loop; the magnetic induction line direction of the first magnetic loop is from bottom to top; the magnetic induction line direction of the second magnetic loop is from top to bottom.
Optionally, the magnetic force measuring unit is disposed at a space between the first magnetic ring and the second magnetic ring.
Optionally, the magnetic force measuring unit is arranged on a side of the non-magnetic conducting body spacer ring away from the rotating shaft.
Optionally, the magnetic force measuring unit is arranged on one side of the non-magnetic conductive spacer ring close to the rotating shaft.
According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect:
the utility model discloses a magnetic force value detection device installs on the rotation axis, magnetic force value detection device includes: a vertical magnetic circuit unit and a magnetic force measuring unit; the vertical magnetic loop unit comprises a first magnetic loop and a second magnetic loop; the first magnetic ring and the second magnetic ring are sleeved on the rotating shaft from top to bottom; a space is arranged between the first magnetic ring and the second magnetic ring; the S pole of the first magnetic ring is opposite to the N pole of the second magnetic ring; the magnetic force measuring unit is used for measuring the magnetic force value generated by the vertical magnetic loop unit. The utility model discloses a two magnetic ring designs from top to bottom, can change original magnetic field return circuit, and the plane magnetic circuit that makes among the prior art becomes perpendicular magnetic circuit to the magnetic circuit that makes to detect is more stable, and the upper and lower magnetic ring sets up the position nearer, so the magnetic ring magnetic induction line can be preferred to form closed magnetic circuit from top to bottom, has avoided magnetic induction line to leak by a wide margin, thereby reduces the influence to other magnetic encoder of group, and then improves magnetic encoder and to the stability and the accuracy that magnetic force value detected.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural view of the magnetic force value detection device of the present invention;
FIG. 2 is a schematic view of the magnetic field state of the magnetic force value detecting device in this embodiment;
FIG. 3 is a schematic configuration diagram of a second application form of the first embodiment in the present embodiment;
FIG. 4 is a schematic configuration diagram of a third application form of the second embodiment in the present embodiment;
fig. 5 is a schematic diagram of a symmetrical dual hall structure in this embodiment.
Description of the symbols:
1-a first magnetic ring; 2-a second magnetic ring; 3-a rotating shaft; 4-a magnetic force measuring unit; 5-non-conductive magnet spacer ring; 6-sensor circuit board.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a magnetic force value detection device can improve the stability and the accuracy of magnetic force measuring unit to the detection of magnetic force value.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the following detailed description.
As shown in fig. 1-2, an embodiment of the present invention provides a magnetic force value detection device, which is installed on a rotating shaft 3, and includes: a vertical magnetic circuit unit and a magnetic force measuring unit 4; the vertical magnetic loop unit comprises a first magnetic ring 1 and a second magnetic ring 2.
The first magnetic ring 1 and the second magnetic ring 2 are sleeved on the rotating shaft 3 from top to bottom; a gap is arranged between the first magnetic ring 1 and the second magnetic ring 2; the S pole of the first magnetic ring 1 is opposite to the N pole of the second magnetic ring 2; the magnetic force measuring unit 4 is used for measuring the magnetic force value generated by the vertical magnetic loop unit. The first magnetic ring 1 and the second magnetic ring 2 can be sleeved outside or inside the rotating shaft 3, and the rotating shaft 3 can be selected according to the sleeving mode.
In addition to the above structure, the apparatus further comprises: a non-conductive magnet spacer ring; the non-magnetic-conductive spacer ring is sleeved on the rotating shaft and is positioned at the interval between the first magnetic ring and the second magnetic ring.
In the present embodiment, the magnetic force measuring unit 4 includes at least one pair of magnetic encoders; each pair of the magnetic encoders includes: a first magnetic encoder and a second magnetic encoder. The first magnetic encoder is used for measuring a magnetic force value of the first magnetic circuit; the second magnetic encoder is used for measuring a magnetic force value of the second magnetic loop; the direction of the magnetic induction line of the first magnetic loop is from bottom to top; the magnetic induction line direction of the second magnetic loop is from top to bottom. The magnetic force measuring unit 4 adopts a hall sensor which is arranged on a sensor circuit board 6.
As a specific embodiment, on the basis of the above structure, when the first magnetic ring 1 and the second magnetic ring 2 are sleeved outside the rotating shaft 3, the following application forms are included in the positional relationship with the magnetic force measuring unit 4.
The first application form is as follows: the first magnetic ring 1 and the second magnetic ring 2 are separated by a non-magnetic-conductive-body spacing ring 5, the magnetic force measuring unit 4 is arranged on one side of the non-magnetic-conductive-body spacing ring 5, which is far away from the rotating shaft, and the device comprises the magnetic force measuring unit 4, a vertical magnetic loop unit and the rotating shaft 3 from outside to inside.
The second application form is as follows: as shown in fig. 3, the magnetic force measuring unit 4 is disposed at the space between the first magnetic ring 1 and the second magnetic ring 2, and a non-magnetic-conductive spacer ring with a spacer ring outer diameter smaller than the first application form and the third application form may be disposed at the space, where the first magnetic ring 1, the magnetic force measuring unit 4, and the second magnetic ring 2 are disposed outside the rotating shaft 3 in sequence from top to bottom.
The third application form is as follows: the first magnetic ring 1 and the second magnetic ring 2 are separated by a non-magnetic-conductive-body spacing ring 5, the magnetic force measuring unit 4 is arranged on one side, close to the rotating shaft, of the non-magnetic-conductive-body spacing ring 5, and the device comprises a vertical magnetic loop unit, a magnetic force measuring unit 4 and the rotating shaft 3 from outside to inside.
As another specific embodiment, on the basis of the above structure, when the first magnetic ring 1 and the second magnetic ring 2 are sleeved inside the rotating shaft 3, the following application forms are included in the positional relationship with the magnetic force measuring unit 4.
The first application form is as follows: the first magnetic ring 1 and the second magnetic ring 2 are separated by a non-magnetic-conductive spacer ring 5, the magnetic force measuring unit 4 is arranged on one side of the non-magnetic-conductive spacer ring 5, which is far away from the rotating shaft, namely the excircle side of the vertical magnetic loop unit, and the device comprises the rotating shaft 3, the magnetic force measuring unit 4 and the vertical magnetic loop unit from outside to inside in sequence.
The second application form is as follows: the magnetic force measuring unit 4 is arranged at the interval between the first magnetic ring 1 and the second magnetic ring 2, a non-magnetic-conductive spacer ring with the spacer ring excircle diameter smaller than that of the first application form and the third application form can be arranged at the interval, and the first magnetic ring 1, the magnetic force measuring unit 4 and the second magnetic ring 2 are arranged outside the rotating shaft 3 in sequence from top to bottom.
The third application form is as follows: as shown in fig. 4, the first magnetic ring 1 and the second magnetic ring 2 are separated by a non-magnetic conductive body spacer ring 5, and the magnetic force measuring unit 4 is disposed on one side of the non-magnetic conductive body spacer ring 5 close to the rotating shaft, that is, the inner circle side of the vertical magnetic loop unit, at this time, the device is composed of the rotating shaft 3, the vertical magnetic loop unit and the magnetic force measuring unit 4 in sequence from outside to inside.
According to the two specific embodiments, the vertical magnetic circuit unit and the magnetic force measuring unit can exchange the stator and rotor identity on the rotating shaft.
Through the structure of the above embodiment, the utility model discloses following beneficial effect has:
the design scheme of upper and lower double magnetic rings is used, the original magnetic field loop can be changed, the planar magnetic loop is changed into a vertical magnetic loop, and the distance is shortened due to the correspondence of the N level and the S level, so that the magnetic loop is more stable.
By adopting the design of double magnetic rings, the upper magnetic ring and the lower magnetic ring are close to each other, so that the magnetic induction lines of the upper magnetic ring and the lower magnetic ring can preferentially form a closed magnetic loop, the leakage of the magnetic induction lines is avoided greatly, the influence on other groups of magnetic encoders is reduced, and the problem of mutual interference of a plurality of groups of magnetic encoding sensors in one device is solved.
Because the magnetic ring is strong magnet and strong magnetizer itself, the same level magnetic field of coming from the outside like this can be repelled by the same level to keep away from the magnetic encoder, the different level magnetic field can be attracted by both sides magnetic ring, thereby can not influence its inductance value through being located the magnetic encoder, thereby improved the anti external disturbance ability in magnetic field.
As shown in fig. 5, on the basis of above-mentioned structure, the utility model discloses original magnetic force value through hall measurement than the tradition possess higher stability and accuracy, and then can realize more accurate angle operation. In the angle operation, the device does not directly use a single Hall original value as an angle calibration magnetic value, uses the difference value of two symmetrical Hall magnetic values as a calibration magnetic value, and can eliminate Hall magnetic interference caused by an external magnetic field due to difference value operation; in practical application, any angle obtained by calibrating the opposite Hall sensor has a corresponding relation with a magnetic value, and Hall magnetic interference caused by an external magnetic field is eliminated by adopting difference value operation, so that any angle obtained by calibrating the opposite Hall sensor corresponding to the magnetic value is not influenced by the external magnetic field, and the device can obtain an actual angle value.
Specifically, assuming that the hall magnetic interference of the external magnetic field to the axis is Δ θ, each hall senses the magnetic value of the magnetic ring of the group of magnetic rings to be θ without being interfered by the external magnetic field 1 ，θ 2 ，θ 3 ，θ 4 Any actual angle value and theta obtained by calibrating relative Hall sensors 1 -θ 3 Or theta 4 -θ 2 The method has a corresponding relation, and after being interfered by the outside, the actual magnetic values obtained by the four Hall sensors are respectively as follows: theta 1 ’＝θ 1 +Δθ,θ 2 ’＝θ 2 +Δθ,θ 3 ’＝θ 3 +Δθ，θ 4 ’＝θ 4 + delta theta, and the device can eliminate the interference delta theta of the external magnetic field, namely theta 1 ’-θ 3 ’＝θ 1 -θ 3 Or theta 4 ’-θ 2 ’＝θ 4 -θ 2 。
The method does not directly use a single Hall original value as an angle calibration magnetic value, uses the difference value of two symmetrical Hall magnetic values as a calibration magnetic value, eliminates delta theta caused by an external magnetic field due to difference operation, and calibrates an angle and a magnetic value pair by a relative Hall sensor at any angleThe relationship is that the angle alpha i Corresponds to theta 1 ’-θ 3 ’＝θ 1 -θ 3 Eliminating the external magnetic field inductance value.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principle and the implementation of the present invention are explained herein by using specific examples, and the above description of the embodiments is only used to help understand the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (6)
1. A magnetic force value detection device, characterized in that, install on the rotation axis, magnetic force value detection device includes: a vertical magnetic circuit unit and a magnetic force measuring unit; the vertical magnetic loop unit comprises a first magnetic loop and a second magnetic loop;
the first magnetic ring and the second magnetic ring are sleeved on the rotating shaft from top to bottom; a space is arranged between the first magnetic ring and the second magnetic ring; the S pole of the first magnetic ring is opposite to the N pole of the second magnetic ring; the magnetic force measuring unit is used for measuring the magnetic force value generated by the vertical magnetic loop unit.
2. The magnetometric value detection device of claim 1, further comprising: a non-conductive magnet spacer ring; the non-magnetic-conductive spacer ring is sleeved on the rotating shaft and is positioned at the interval between the first magnetic ring and the second magnetic ring.
3. The magnetometric device of claim 1, wherein the magnetometric unit comprises at least one pair of magnetic encoders; each pair of the magnetic encoders includes: a first magnetic encoder and a second magnetic encoder;
the first magnetic encoder is used for measuring a magnetic force value of the first magnetic circuit; the second magnetic encoder is used for measuring a magnetic force value of the second magnetic loop; the direction of the magnetic induction line of the first magnetic loop is from bottom to top; the magnetic induction line direction of the second magnetic loop is from top to bottom.
4. The magnetic force value detection device according to claim 1, wherein the magnetic force measurement unit is provided at a space between the first magnetic ring and the second magnetic ring.
5. The magnetic force value detecting device according to claim 2, wherein the magnetic force measuring unit is provided on a side of the non-magnetic conductive spacer ring away from the rotation axis.
6. The magnetic force value detecting device according to claim 2, wherein the magnetic force measuring unit is provided on a side of the non-magnetic conductive spacer ring close to the rotation axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223030620.9U CN218727948U (en) | 2022-11-15 | 2022-11-15 | Magnetic force value detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223030620.9U CN218727948U (en) | 2022-11-15 | 2022-11-15 | Magnetic force value detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218727948U true CN218727948U (en) | 2023-03-24 |
Family
ID=85616713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223030620.9U Active CN218727948U (en) | 2022-11-15 | 2022-11-15 | Magnetic force value detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218727948U (en) |
-
2022
- 2022-11-15 CN CN202223030620.9U patent/CN218727948U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101253389B (en) | Rotation angle detection apparatus | |
| JP6549676B2 (en) | Measurement of absolute angular position | |
| CN101929834B (en) | Rotational angle-measurement apparatus and rotational speed-measurement apparatus | |
| CN112113585B (en) | Encoder and method for detecting absolute angle of encoder | |
| US10240961B2 (en) | Electronic water meter | |
| CN110645882B (en) | Position sensor system and method robust against interference fields | |
| JP6412014B2 (en) | Magnetic angle encoder and electronic water meter | |
| CN206339246U (en) | A kind of high-precision rotating speed and rotation absolute angular position measurement sensor | |
| US10168184B2 (en) | Angle sensing in an off-axis configuration | |
| CN111682706B (en) | Hall sensing device, permanent magnet motor and FOC control angle detection method | |
| JP2015526730A (en) | Apparatus, method, and sensor for measuring absolute angular position using multipolar magnet | |
| CN102868279B (en) | Magnetic rotary encoder of low speed electromotor | |
| US9587963B2 (en) | Brushless linear rotary transformer | |
| CN110595349B (en) | Multipole magnet, method of manufacturing a multipole magnet and sensor system comprising the same | |
| JP2016505215A (en) | Permanent magnet suitable for magnetic angle encoder | |
| US20210255003A1 (en) | A magnetic encoder | |
| CN218727948U (en) | Magnetic force value detection device | |
| CN113093068A (en) | Magnetic field direction detection method and system | |
| CN210922654U (en) | Magnetoelectric encoder based on giant magnetoresistance effect | |
| Guyol | AMR Angle Sensors | |
| CN210041574U (en) | Motor rotor angle measuring device | |
| CN110388944A (en) | Encoder | |
| CN214372241U (en) | Angle measuring device | |
| CN117007086B (en) | High-precision magnetoelectric encoder and method for detecting absolute angle of magnetoelectric encoder | |
| CN217786211U (en) | Encoder for encoding a video signal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |