CN115684633B - Magnetic rotation speed sensor - Google Patents
Magnetic rotation speed sensor Download PDFInfo
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- CN115684633B CN115684633B CN202211712278.2A CN202211712278A CN115684633B CN 115684633 B CN115684633 B CN 115684633B CN 202211712278 A CN202211712278 A CN 202211712278A CN 115684633 B CN115684633 B CN 115684633B
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Abstract
The invention discloses a magnetic rotating speed sensor, which relates to the field of rotating speed sensors and comprises a magnetic steel assembly, a measuring end assembly and a shielding component; the magnetic steel component comprises a structural part and a permanent magnet; the structural part is provided with a rotating shaft mounting hole; the permanent magnet is arranged on the structural part around the rotating shaft mounting hole; the measuring end component is arranged on one radial side of the magnetic steel component; the measuring end assembly comprises a first coil soft magnetic core and a coil assembly; the axis of the coil component is vertical to the end surface of the first coil soft magnetic core, and the coil component is positioned between the first coil soft magnetic core and the magnetic steel component; the coil shielding member is disposed outside the coil assembly; the magnetic steel assembly shielding component comprises an inner shielding component and an outer shielding component; the inner shielding component is arranged on the inner wall of the rotating shaft mounting hole and is in contact connection with the rotating shaft of the measured target; the magnetic steel component is arranged inside the outer shielding component and is in contact connection with the coil shielding component. The invention can improve the signal-to-noise ratio and the adaptability of the product installation environment.
Description
Technical Field
The invention relates to the field of rotating speed sensors, in particular to a magnetic rotating speed sensor.
Background
Fig. 1 is a schematic diagram of the operation principle of a typical magnetic tachometer sensor, as shown in fig. 1, the typical magnetic tachometer sensor is divided into two parts, one of which is a magnetic steel component, and the other is a measuring end component, the measuring end component has a T-shaped soft magnetic core and a coil, and the T-shaped soft magnetic core is made of soft magnetic material. 4 permanent magnets are arranged on the magnetic steel component, the permanent magnets are made of permanent magnet materials, and the magnetic poles N, S are arranged alternately along the circumference. The structural members of the magnetic steel assembly used to support the permanent magnets typically use non-magnetic materials. The mounting hole on the magnetic steel component is connected with a rotating shaft of a measured target, when the rotating shaft rotates, the permanent magnet is driven to synchronously rotate, so that a magnetic field inside the T-shaped soft magnetic core in the measuring end generates synchronous alternate change, a coil wound outside the soft magnetic core generates an alternating voltage signal due to the alternating magnetic field, and the rotating speed of the rotating shaft can be obtained by measuring the period of the alternating voltage signal by a signal collector. The sensor can realize non-contact measurement, has long sensing distance, simple structure and high reliability, and is widely applied to the measurement of the rotating speed of the aeronautical equipment. Especially when high reliability is required, the method has unique advantages.
For any sensor, the signal-to-noise ratio is usually an important measure of performance, and is usually the larger the better. The coil exterior of the magnetic rotation speed sensor shown in fig. 1 is functionally open, and external electromagnetic interference can also sense harmful noise signals in the coil, thereby reducing the detectability of effective signals.
Figure 2 shows a typical installation environment for such a product in two views. Two components of the revolution speed transducer are respectively arranged on the measured rotating shaft and the supporting seat, and the measured equipment determines the geometric corresponding relation. The tested equipment is also provided with a signal collector which is electrically connected with the sensor measuring end component through a signal transmission cable. When the measured rotating shaft rotates, the measuring end component outputs an electric signal related to the rotating speed, and the signal period is measured by the signal collector to obtain the rotating speed. Because the product is based on the electromagnetic field principle, the electric property and the magnetic property of the materials used by the rotating shaft and the supporting seat can influence the magnitude of the output signal, so that the product has different performances on different systems. Compared with the set standard environment, in some installation environments of the same product, the voltage of the output electric signal of the product is increased to obtain positive gain, and in other installation environments, the voltage of the output electric signal of the product is attenuated to obtain negative gain. Although the output signal voltage change caused by the installation environment does not affect the signal period and the rotating speed measurement precision, the change has an influence on the adaptability of using the electric signal collector. Where there is a risk of damaging the signal collector due to an increase in voltage and a risk of not collecting the signal collector when the voltage is reduced. This problem of the output signal voltage being affected by the installation environment reduces product interchangeability, which can drive up usage and maintenance costs.
Disclosure of Invention
The invention aims to provide a magnetic rotating speed sensor which can improve the signal-to-noise ratio and the adaptability of a product installation environment.
In order to achieve the purpose, the invention provides the following scheme:
a magnetic speed sensor comprising: the magnetic steel component, the measuring end component and the shielding component;
the magnetic steel component comprises a structural part and a permanent magnet; the structural part is provided with a rotating shaft mounting hole; the permanent magnets are arranged on the structural part around the rotating shaft mounting hole; the measured target rotating shaft is fixedly connected with the magnetic steel assembly through the rotating shaft mounting hole and is used for driving the magnetic steel assembly and the measured target rotating shaft to synchronously rotate so as to enable the internal magnetic field of the measuring end assembly to synchronously and alternately change;
the measuring end assembly is arranged on one radial side of the magnetic steel assembly; the measuring end assembly comprises a first coil soft magnetic core and a coil assembly; the axis of the coil component is perpendicular to the end face of the first coil soft magnetic core, and the coil component is positioned between the first coil soft magnetic core and the magnetic steel component;
the shielding component is used for blocking electromagnetic interference of an external magnetic field to the coil component and the magnetic steel component and improving the amplitude of voltage output by the coil component under the rotation action of the magnetic steel component; the shielding component comprises a coil shielding component and a magnetic steel assembly shielding component; the coil shielding member is disposed outside the coil assembly;
the magnetic steel assembly shielding component comprises an inner shielding component and an outer shielding component; the inner shielding component is arranged on the inner wall of the rotating shaft mounting hole and is in contact connection with the rotating shaft of the measured target; the outer shielding component is arranged outside the magnetic steel component and is in contact connection with the coil shielding component.
Optionally, the coil assembly comprises a second coil soft magnetic core and a measuring coil wound on the second coil soft magnetic core.
Optionally, the end surface of the first coil soft magnetic core is perpendicularly connected with the axis of the second coil soft magnetic core.
Optionally, an axis of the coil shielding member is perpendicularly connected to an end surface of the first coil soft magnetic core and is parallel to an axis of the second coil soft magnetic core.
Optionally, the structural member is a non-magnetic material.
Optionally, on the cross section of the magnetic speed sensor, the inner shielding member, the outer shielding member, the coil shielding member and the first coil soft magnetic core form a closed magnetic shielding surface, and the magnetic steel assembly and the coil assembly are located in the closed magnetic shielding surface.
Optionally, the material of the shielding member is a soft magnetic material.
Optionally, the number of the permanent magnets is multiple; the permanent magnets are uniformly arranged on the structural member around the rotating shaft mounting hole, and the polarities of the magnetic poles of the adjacent permanent magnets are opposite.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a magnetic rotation speed sensor, comprising: the magnetic steel component, the measuring end component and the shielding component; the magnetic steel component comprises a structural part and a permanent magnet; the structural part is provided with a rotating shaft mounting hole; the permanent magnet is arranged on the structural member around the rotating shaft mounting hole; the rotating shaft of the measured target is fixedly connected with the magnetic steel component through the rotating shaft mounting hole and is used for driving the magnetic steel component and the rotating shaft of the measured target to synchronously rotate so as to enable the internal magnetic field of the measuring end component to synchronously and alternately change; the measuring end component is arranged on one radial side of the magnetic steel component; the measuring end assembly comprises a first coil soft magnetic core and a coil assembly; the axis of the coil component is vertical to the end surface of the first coil soft magnetic core, and the coil component is positioned between the first coil soft magnetic core and the magnetic steel component; the shielding component is used for blocking electromagnetic interference of an external magnetic field to the coil component and the magnetic steel component and improving the amplitude of voltage output by the coil component under the rotation action of the magnetic steel component; the shielding component comprises a coil shielding component and a magnetic steel assembly shielding component; the coil shielding member is disposed outside the coil assembly; the magnetic steel assembly shielding component comprises an inner shielding component and an outer shielding component; the inner shielding component is arranged on the inner wall of the rotating shaft mounting hole and is in contact connection with the rotating shaft of the measured target; the outer shielding component is arranged outside the magnetic steel component and is in contact connection with the coil shielding component. According to the invention, the shielding component is used for blocking the electromagnetic interference of an external magnetic field to the coil component and the magnetic steel component and improving the amplitude of the voltage output by the coil component under the rotation action of the magnetic steel component, so that the aims of improving the signal-to-noise ratio and the product installation environment adaptability are fulfilled.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed 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 it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic diagram of a typical magnetic tachometer sensor;
FIG. 2 is a schematic view of a magnetic tachometer sensor mounted for use;
FIG. 3 is a schematic diagram of a magnetic tachometer sensor according to the present invention;
FIG. 4 is a plan view of one form of construction of a magnetic tachometer sensor provided in accordance with the present invention;
FIG. 5 is a plan view of a simulation model of a conventional magnetic tachometer sensor with an interference coil added to the side of the measuring end assembly;
FIG. 6 is a diagram of the interference signal from the interference coil sensed by a conventional magnetic tachometer sensor;
FIG. 7 is a plan view of a simulation model of the magnetic tachometer sensor with an interference coil added to the side of the measuring end assembly;
FIG. 8 illustrates an interference signal from an interference coil sensed by the magnetic rotation rate sensor of the present invention;
FIG. 9 is a schematic structural view of a magnetic rotation speed sensor provided with a rotating shaft and a supporting seat according to the present invention;
FIG. 10 is a diagram illustrating a coil output voltage curve of a magnetic tachometer sensor without a shield member when the rotating shaft material is ABS and the supporting base material is ABS;
FIG. 11 is a diagram illustrating the output voltage curve of the coil of the magnetic tachometer sensor without the shield when the material of the rotating shaft is ABS and the material of the supporting seat is 1J 50;
FIG. 12 is a graph showing the output voltage curve of the coil of the magnetic tachometer sensor having a partial shield when the material of the shaft is ABS and the material of the support pedestal is ABS;
FIG. 13 is a graph showing the output voltage curve of the coil of the magnetic tachometer sensor having a partial shield when the material of the rotating shaft is ABS and the material of the supporting base is 1J 50;
FIG. 14 is a diagram illustrating a coil output voltage curve of a magnetic tachometer sensor having a shield member when the shaft material is ABS and the support material is ABS;
FIG. 15 is a graph showing the output voltage curve of the coil of the magnetic tachometer sensor with a shield when the shaft material is ABS and the support base material is 1J 50;
FIG. 16 is a schematic view of one form of construction of the soft magnetic core and coil shield member;
FIG. 17 is a schematic view of one configuration of the soft magnetic core and the coil shield member;
fig. 18 is a non-fully enclosed version of the outer shield member provided by the present invention.
Fig. 19 shows a three-pair-pole magnetic ring according to the present invention.
Description of the symbols:
the device comprises a magnetic steel component-1, a measuring end component-2, a shielding component-3, a structural component-11, a permanent magnet-12, a first coil soft magnetic core-21, a coil component-22, a second coil soft magnetic core-221, a measuring coil-222, a coil shielding component-31, a magnetic steel component shielding component-32, an inner shielding component-321, an outer shielding component-322, a rotating shaft mounting hole-4, a closed magnetic shielding surface-5, a supporting seat-6, a measured target rotating shaft-7, a signal collector-8 and a signal transmission cable-9.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a magnetic rotating speed sensor which can reduce the response of external electromagnetic interference, improve the voltage of an output electric signal, and improve the signal-to-noise ratio and the adaptability of a product installation environment.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example one
The invention provides a magnetic rotation speed sensor, comprising: magnet steel subassembly 1, measuring end subassembly 2 and shield member 3.
The magnetic steel assembly 1 comprises a structural part 11 and a plurality of permanent magnets 12; the structural part 11 is provided with a rotating shaft mounting hole 4; the permanent magnets 12 are uniformly arranged on the structural member 11 around the rotating shaft mounting hole 4, and the polarities of the magnetic poles of the adjacent permanent magnets 12 are opposite; the measured target rotating shaft 7 is fixedly connected with the magnetic steel component 1 through the rotating shaft mounting hole 4 and is used for driving the magnetic steel component 1 and the measured target rotating shaft 7 to synchronously rotate, so that the magnetic field in the measuring end component 2 generates synchronous alternate change; specifically, the structural member 11 is a non-magnetic material.
The measuring end assembly 2 is arranged on one radial side of the magnetic steel assembly 1; the measuring end assembly 2 comprises a first coil soft magnetic core 21 and a coil assembly 22; the axis of the coil component 22 is perpendicular to the end face of the first coil soft magnetic core 21, and the coil component 22 is located between the first coil soft magnetic core 21 and the magnetic steel component 1.
The shielding component 3 is used for blocking electromagnetic interference of an external magnetic field to the coil component 22 and the magnetic steel component 1 and improving the amplitude of voltage output by the coil component 22 under the rotation action of the magnetic steel component 1; the shielding component 3 comprises a coil shielding component 31 and a magnetic steel assembly shielding component 32; the coil shielding member 31 is disposed outside the coil block 22; specifically, the material of the shielding member 3 is a soft magnetic material.
The magnetic steel assembly shielding component 32 comprises an inner shielding component 321 and an outer shielding component 322; the inner shielding component 321 is arranged on the inner wall of the rotating shaft mounting hole 4 and is in contact connection with the rotating shaft 7 of the measured object; the outer shielding member 322 is disposed outside the magnetic steel assembly 1 and is in contact with the coil shielding member 31.
Specifically, the coil assembly 22 includes a second coil soft magnetic core 221 and a measuring coil 222 wound around the second coil soft magnetic core 221. Wherein, the second coil soft magnetic core 221 is cylindrical; the end surface of the first coil soft magnetic core 21 is vertically connected with the axis of the second coil soft magnetic core 221. The cross section of the structure formed by the second coil soft magnetic core 221 and the first coil soft magnetic core 21 along the axis of the second coil soft magnetic core 221 is T-shaped; the axis of the coil shielding member 31 is perpendicular to the end surface of the first coil soft magnetic core 21 and parallel to the axis of the second coil soft magnetic core 221. The coil shielding member 31, the first coil soft magnetic core 21, and the second coil soft magnetic core 221 form a structure, and the cross section of the structure along the axis of the coil shielding member 31 and the second coil soft magnetic core 221 is E-shaped. Further, the first coil soft magnetic core 21 is shaped like a disk.
As shown in fig. 3 and 4, in the cross section of the magnetic speed sensor, the inner shielding member 321, the outer shielding member 322, the coil shielding member 31 and the first coil soft magnetic core 21 form a closed magnetic shielding surface 5, and the magnetic steel assembly 1 and the coil assembly 22 are located in the closed magnetic shielding surface 5.
According to the installation of fig. 2, the outlet of the measuring coil 222 transmits the collected electrical signal to the signal collector 8 via the signal transmission cable 9.
As an embodiment, as shown in fig. 3, three shielding members 3 made of soft magnetic materials, namely, a coil shielding member 31, an outer shielding member 322, and an inner shielding member 321, are added to the conventional structure shown in fig. 1. The material of the shielding member 3 is similar or identical to the soft magnetic core. The coil shield 31 is in contact with the outer shield 322 to form a closed loop of soft magnetic material which together with the inner shield 321 forms a relatively closed space, which is completely closed as shown in figure 4. The coil and the permanent magnet 12 for realizing the function of the sensor are positioned in the relatively closed space, and can effectively block external electromagnetic interference. Meanwhile, the magnetic circuit can be optimized by the shielding component 3, so that the magnetic field fluctuation in the soft magnetic core can be enhanced, and the voltage output of the coil can be improved. This improves the useful signal and reduces the interference signal, improving the signal-to-noise ratio of the product from both directions. The shielding component 3 made of soft magnetic material can also isolate the influence of the electromagnetic property change of the external components on the sensor, so that no matter the external matching parts of the product are made of conductive materials, non-conductive materials, magnetic conductive materials and non-magnetic conductive materials, the influence can be isolated by the shielding component 3, and the influence is reduced to the degree meeting the requirement.
FIG. 5 is a plan view of a simulation model of a conventional magnetic tachometer sensor with an interference coil added to the side of the measuring end assembly. The interference coil shown in fig. 5 is connected to an interference signal with a certain intensity, and can be sensed by a nearby magnetic rotation speed sensor through spatial electromagnetic radiation, and fig. 6 is the interference signal sensed by a conventional magnetic rotation speed sensor. An ac noise interference signal with a peak-to-peak value of 426mV can be seen in fig. 6.
Fig. 7 is a plan view of a simulation model of the present invention with an interference coil added beside the measuring end assembly of the magnetic rotation speed sensor. The interference coil shown in fig. 7 is connected to an interference signal with the same intensity, and can be sensed by a nearby magnetic rotation speed sensor through spatial electromagnetic radiation, and fig. 8 is the interference signal sensed by the magnetic rotation speed sensor according to the present invention. An ac noise interference signal with a peak-to-peak value of 201mV can be seen in fig. 8.
Comparing fig. 6 and 8, it can be seen that the response of the magnetic tachometer provided by the present invention to the same disturbance is reduced by half.
According to the installation mode of fig. 2, a plane model calculated by simulation is established as shown in fig. 9, the completely solid filling area in the figure is the supporting seat 6, in order to reduce the simulation computation amount, the space filled by the actual supporting seat 6 is not fully expressed, only a small area is taken out, the material of the small area is changed, and the influence before and after the change is checked. 1J50 is taken as a soft magnetic material with high magnetic permeability and weak conductivity to represent and participate in the calculation. ABS engineering plastics are used as representatives of non-magnetic conductivity and non-conductive structural materials to participate in calculation. Based on this model, 1J50 was used for the soft magnetic core and the three members for shielding. Data for the coil output voltage under various conditions are listed in table 1.
As can be derived from table 1, fig. 10 is a schematic diagram of a coil output voltage curve of the magnetic rotation speed sensor without the shielding member when the material of the rotating shaft is ABS and the material of the supporting seat 6 is ABS; FIG. 11 is a diagram showing the output voltage curve of the coil of the magnetic tachometer sensor without the shield when the material of the rotating shaft is ABS and the material of the supporting base 6 is 1J 50; FIG. 12 is a graph showing the output voltage curve of the coil of the magnetic tachometer sensor having a partial shield when the material of the rotating shaft is ABS and the material of the supporting base 6 is ABS; FIG. 13 is a graph showing the output voltage curve of the coil of the magnetic tachometer sensor having a partial shield when the material of the rotating shaft is ABS and the material of the supporting base 6 is 1J 50; FIG. 14 is a diagram illustrating the output voltage curve of the coil of the magnetic tachometer sensor with a shield when the material of the rotating shaft is ABS and the material of the supporting base 6 is ABS; FIG. 15 is a diagram illustrating the output voltage curve of the coil of the magnetic tachometer sensor with a shield when the material of the rotating shaft is ABS and the material of the supporting base 6 is 1J 50;
fig. 10 to 15 show the output voltage of the coil under different shielding strategies and under the condition that other conditions are not changed in two cases that the mounting seat and the rotating shaft respectively adopt 1J50 and ABS engineering materials, and the horizontal axis parameter and the vertical axis parameter in fig. 10 to 15 are both time T and coil output voltage U. As can be seen from the data of table 1, the shield member application scheme in scheme 3 completely eliminates the influence of the installation environment. The peak-to-peak value of the coil voltage output in the application scheme B in the scheme 3 is 2.56V, the peak-to-peak value of the coil voltage output in the application scheme A in the scheme 1 is 1.451V, and the voltage is improved by 76.4%.
Example two
As shown in fig. 18, in the cross section of the magnetic speed sensor, the inner shielding member 321, the outer shielding member 322, the coil shielding member 31, and the first coil soft magnetic core 21 form an unsealed magnetic shielding surface, and the magnetic steel assembly 1 and the coil assembly 22 are located in the unsealed magnetic shielding surface. Specifically, the outer shielding member 322 itself is disconnected or the outer shielding member 322 is not connected to the coil shielding member 31, that is, only one end or both ends of the outer shielding member 322 are connected to the coil shielding member 31.
Further, the coil shielding member 31 and the inner shielding member 321 may be assembled with two components of the magnetic sensor, and the outer shielding member 322 needs to be designed and assembled with the object detection device.
According to the structural requirement, the cross sections of the second coil soft magnetic core 221 and the first coil soft magnetic core 21 which are included in the T-shaped soft magnetic core can be square or round; the shielding component may be in other shapes, and the soft magnetic shielding ring formed by the coil shielding component 31 may be a complete ring or not, and is adjusted according to the shielding effect requirement and the application of the scene; when the degree of closure is reduced, the effect of performance is reduced, and the design can be flexibly processed. Fig. 16 and 17 show two further forms of soft magnetic core and coil shield member 31. In fig. 16 and 17, the cross sections of the first coil soft magnetic core 21 and the second coil soft magnetic core 221 may form a T-shaped soft magnetic core or an L-shaped soft magnetic core; the coil shielding member 31 may be disposed around the outside of the coil assembly 22, or may surround a partial region of the coil assembly 22.
The permanent magnets are arranged on the structural part around the rotating shaft mounting hole, and the number of the permanent magnets in the magnetic steel assembly can be one or more, and the arrangement can also be non-uniform. In the case of using a permanent magnetic material capable of multi-pole magnetization, a single ring-shaped component can perform the functions that can be performed by a plurality of permanent magnets. Figure 19 shows a magnetic ring made of LNG52 with three pairs of poles.
The magnetic speed sensor provided by the invention uses the shielding component made of soft magnetic materials, and the shielding component and the conventional T-shaped soft magnetic core together form a relatively closed magnetic shielding space to protect the coil and the permanent magnet 12, so that the response of the sensor to external electromagnetic interference is reduced, the induction output voltage of the coil can be improved, the signal-to-noise ratio of the output signal is improved, and the influence of the sensor on the change of the external materials is reduced or eliminated because the coil and the permanent magnet 12 are placed in the magnetic shielding space.
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 principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A magnetic rotation speed sensor, comprising: the magnetic steel component, the measuring end component and the shielding component;
the magnetic steel component comprises a structural part and a permanent magnet; the structural part is provided with a rotating shaft mounting hole; the permanent magnets are arranged on the structural part around the rotating shaft mounting hole; the measured target rotating shaft is fixedly connected with the magnetic steel component through the rotating shaft mounting hole and is used for driving the magnetic steel component and the measured target rotating shaft to synchronously rotate so as to enable the internal magnetic field of the measuring end component to synchronously and alternately change;
the measuring end assembly is arranged on one radial side of the magnetic steel assembly; the measuring end assembly comprises a first coil soft magnetic core and a coil assembly; the axis of the coil component is perpendicular to the end face of the first coil soft magnetic core, and the coil component is positioned between the first coil soft magnetic core and the magnetic steel component;
the shielding component is used for blocking electromagnetic interference of an external magnetic field to the coil component and the magnetic steel component and improving the amplitude of voltage output by the coil component under the rotation action of the magnetic steel component; the shielding component comprises a coil shielding component and a magnetic steel assembly shielding component; the coil shielding member is disposed outside the coil assembly;
the magnetic steel assembly shielding component comprises an inner shielding component and an outer shielding component; the inner shielding component is arranged on the inner wall of the rotating shaft mounting hole and is in contact connection with the rotating shaft of the measured target; the outer shielding component is arranged outside the magnetic steel component and is in contact connection with the coil shielding component.
2. A magnetic speed sensor according to claim 1, wherein the coil assembly comprises a second coil soft magnetic core and a measuring coil wound on the second coil soft magnetic core.
3. A magnetic speed sensor according to claim 2, wherein the end face of the first coil soft magnetic core is perpendicularly connected to the axis of the second coil soft magnetic core.
4. A magnetic speed sensor according to claim 2, wherein the axis of the coil shield member is perpendicularly connected to the end face of the first coil soft magnetic core and is parallel to the axis of the second coil soft magnetic core.
5. A magnetic speed sensor according to claim 1, wherein the structural member is a non-magnetic conductive material.
6. A magnetic speed sensor according to claim 1, wherein, in the magnetic speed sensor cross-section, the inner shield member, the outer shield member, the coil shield member and the first coil soft magnetic core form a closed magnetic shield face and the magnetic steel assembly and the coil assembly are within the closed magnetic shield face.
7. A magnetic rate sensor according to claim 1, wherein the material of the shield member is a soft magnetic material.
8. A magnetic rotation speed sensor according to claim 1, wherein the number of the permanent magnets is plural; the permanent magnets are uniformly arranged on the structural member around the rotating shaft mounting hole, and the magnetic poles of the adjacent permanent magnets are opposite in polarity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211712278.2A CN115684633B (en) | 2022-12-30 | 2022-12-30 | Magnetic rotation speed sensor |
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| CN202211712278.2A CN115684633B (en) | 2022-12-30 | 2022-12-30 | Magnetic rotation speed sensor |
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| CN115684633B true CN115684633B (en) | 2023-03-10 |
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| JPH07333237A (en) * | 1994-06-06 | 1995-12-22 | Furukawa Electric Co Ltd:The | Wheel speed sensor and manufacture thereof |
| JP2013223417A (en) * | 2012-04-17 | 2013-10-28 | Mamoru Hoshi | Fixed permanent magnet generator |
| CN108344878A (en) * | 2018-02-12 | 2018-07-31 | 西安航天动力研究所 | A kind of big signal small size ultralow temperature magnetoelectric tachometric transducer |
| CN108802852A (en) * | 2018-06-15 | 2018-11-13 | 中国科学院地质与地球物理研究所 | A kind of Magnetic Sensor test device |
| CN110441543A (en) * | 2019-07-18 | 2019-11-12 | 浙江大学 | Core inductance formula angular speed sense measuring device and method based on magnetic saturation characteristic |
| CN115060924A (en) * | 2022-08-18 | 2022-09-16 | 四川新川航空仪器有限责任公司 | Magnetic shielding-based rotation speed sensor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007042920A1 (en) * | 2007-09-08 | 2009-03-12 | Schaeffler Kg | Sensor arrangement for a shaft mounted in a magnetic bearing |
| CN106716836B (en) * | 2014-09-09 | 2020-11-20 | 巴鲁夫公司 | Sensor element of an inductive proximity sensor or distance sensor and method for operating the sensor element |
| CN210724172U (en) * | 2019-12-05 | 2020-06-09 | 尹鹏 | Quick-connection type railway signal cable connecting sleeve |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07333237A (en) * | 1994-06-06 | 1995-12-22 | Furukawa Electric Co Ltd:The | Wheel speed sensor and manufacture thereof |
| JP2013223417A (en) * | 2012-04-17 | 2013-10-28 | Mamoru Hoshi | Fixed permanent magnet generator |
| CN108344878A (en) * | 2018-02-12 | 2018-07-31 | 西安航天动力研究所 | A kind of big signal small size ultralow temperature magnetoelectric tachometric transducer |
| CN108802852A (en) * | 2018-06-15 | 2018-11-13 | 中国科学院地质与地球物理研究所 | A kind of Magnetic Sensor test device |
| CN110441543A (en) * | 2019-07-18 | 2019-11-12 | 浙江大学 | Core inductance formula angular speed sense measuring device and method based on magnetic saturation characteristic |
| CN115060924A (en) * | 2022-08-18 | 2022-09-16 | 四川新川航空仪器有限责任公司 | Magnetic shielding-based rotation speed sensor |
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| CN115684633A (en) | 2023-02-03 |
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