CN115792269A - Rotating physical quantity measuring sensor - Google Patents
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- CN115792269A CN115792269A CN202211559694.3A CN202211559694A CN115792269A CN 115792269 A CN115792269 A CN 115792269A CN 202211559694 A CN202211559694 A CN 202211559694A CN 115792269 A CN115792269 A CN 115792269A
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Abstract
The invention belongs to the technical field of sensors, and discloses a rotating physical quantity measuring sensor which comprises a signal analysis module, a rotor and a stator, wherein the rotor and the stator are oppositely arranged; a plurality of stator cantilever beams are circumferentially arranged on the stator; a plurality of rotor cantilever beams are circumferentially arranged on the rotor, and a first magnetic part is arranged at one end of each rotor cantilever beam, which is far away from the rotor; a first insulating material, a piezoelectric material unit, a second insulating material and a second magnetic component are sequentially arranged on one end, far away from the stator, of the stator cantilever beam; the piezoelectric material unit is connected with the signal analysis module; the signal analysis module is used for obtaining the rotation physical quantity of the rotor according to the piezoelectric signals output by the piezoelectric material units; the first magnetic member and the second magnetic member repel or attract each other. The invention has the advantages of simple structure, easy processing and manufacturing, strong anti-interference capability, small volume, low cost, high precision and the like, and has important application potential in various fields of national defense industry, aerospace, mechanical equipment and the like.
Description
Technical Field
The invention belongs to the technical field of sensors, and relates to a rotating physical quantity measuring sensor.
Background
The information such as the rotating speed, the angular displacement, the angular velocity, the angular acceleration and the like is common physical quantity of rotation to be measured in mechanical motion. The device measures the rotating speed, the angular displacement, the angular velocity and the angular acceleration of a mechanical rotating part, and has huge requirements and application potentials in the fields of control, monitoring, navigation and the like. At present, common rotating physical quantity measuring sensors, such as rotating speed, angular displacement, angular velocity and angular acceleration measuring sensors, all put high requirements on processing, manufacturing, assembling processes and the like.
For example, in the measurement of the relative rotation of the motor, a high-resolution encoder is commonly used, and the high-resolution encoder puts high requirements on the photoetching process, the signal processing circuit, the photosensitive element and the like. The rotary transformer is another common sensor for measuring physical quantities such as angular displacement, angular velocity and the like of rotating equipment, but the high-precision rotary transformer has high winding requirements and needs high manufacturing, processing and assembling process levels. The electromagnetic angular velocity sensor is widely applied to measurement of angular rotation speed, and utilizes an electromagnetic induction principle to convert an input motion speed into an induced potential in a coil to be output, so as to obtain an angular velocity value result of a measured machine. Since the change of the magnetic flux is related to the rotation speed, if the rotation speed is slow, the change of the corresponding magnetic flux is slow, the induced voltage is small, and the signal cannot be detected at a low rotation speed. Meanwhile, the electromagnetic angular velocity sensor detects the angular velocity by sensing the change of the magnetic flux in the coil, so that the electromagnetic interference resistance is poor.
To sum up, the existing rotating physical quantity measuring sensor has the disadvantages of complex structure, higher processing and manufacturing difficulty, high cost and poor anti-interference capability, and further causes lower measuring precision.
Disclosure of Invention
The invention aims to overcome the defects that the existing rotating physical quantity measuring sensor in the prior art is complex in structure, high in processing and manufacturing difficulty, high in cost and poor in anti-interference capability, and further causes lower measuring precision, and provides a novel efficient rotating physical quantity measuring sensor.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
in a first aspect of the present invention, a rotating physical quantity measuring sensor is provided, which includes a signal analysis module, and a rotor and a stator that are disposed opposite to each other; a plurality of stator cantilever beams are circumferentially arranged on the stator; a plurality of rotor cantilever beams opposite to the stator cantilever beams are circumferentially arranged on the rotor, and a first magnetic part is arranged at one end of each rotor cantilever beam, which is far away from the rotor; a first insulating material, a piezoelectric material unit, a second insulating material and a second magnetic component are sequentially arranged on one end, far away from the stator, of the stator cantilever beam; the piezoelectric material unit is provided with wires, and each wire is connected with the signal analysis module; the signal analysis module is used for obtaining the rotation physical quantity of the rotor according to the piezoelectric signals output by the piezoelectric material units; the first magnetic component and the second magnetic component repel or attract each other.
Optionally, the rotating physical quantity includes one or more of the following: rotational speed, angular displacement, angular velocity, and angular acceleration.
Optionally, the rotor and the stator are both of a circular ring structure.
Optionally, the first magnetic component is a ferromagnetic metal block, a permanent magnet or an electromagnet; the second magnetic part is a ferromagnetic metal block, a permanent magnet or an electromagnet.
Optionally, the piezoelectric material unit includes a piezoelectric material and a metal electrode coated on the surface of the piezoelectric material, and the metal electrode is connected to the signal analysis module through a wire.
Optionally, the stator cantilever beam is provided with a first wire hole, the stator is provided with a plurality of second wire holes, and the wires sequentially penetrate through the first wire hole and the second wire hole to connect the piezoelectric material with the signal analysis module.
Optionally, the rotating physical quantity measuring sensor further includes an auxiliary circuit; each lead is connected with the signal analysis module through an auxiliary circuit; the auxiliary circuit is an amplifying circuit, a noise reduction circuit or an amplifying circuit and a noise reduction circuit which are connected with each other.
Optionally, the rotating physical quantity measuring sensor further includes a display device; and the display device is connected with the signal analysis module and used for receiving the rotation physical quantity of the rotor sent by the signal analysis module and carrying out visual display.
In a second aspect of the present invention, a sensor for measuring a rotation physical quantity is provided, which includes a signal analysis module, a stator, and a plurality of rotor cantilevers; one end of the rotor cantilever beam is provided with a plurality of first magnetic parts, and the other end of the rotor cantilever beam is used for connecting the circumferential surface of an object to be detected; a plurality of stator cantilever beams are circumferentially arranged on the inner wall of the stator, and the stator cantilever beams are arranged along the radial direction of the stator and face the circle center of the stator; a first insulating material, a piezoelectric material unit, a second insulating material and a second magnetic component are sequentially arranged on one end, far away from the stator, of the stator cantilever beam; the piezoelectric material unit is provided with wires, and each wire is connected with the signal analysis module; the signal analysis module is used for obtaining the rotation physical quantity of the rotor according to the piezoelectric signals output by the piezoelectric material units; the first magnetic part and the second magnetic part repel or attract each other; when the stator is in use, the rotor cantilever beam and the stator cantilever beam are oppositely arranged.
Optionally, the plurality of rotor cantilevers and the plurality of first magnetic components are structural components of the object to be detected.
Compared with the prior art, the invention has the following beneficial effects:
according to the rotating physical quantity measuring sensor, the piezoelectric material units are triggered to generate piezoelectric signals through mutual repulsion or mutual attraction between the first magnetic component and the second magnetic component which are arranged oppositely, and then the signal analysis module is used for obtaining the rotating physical quantity of the rotor according to the piezoelectric signals output by the piezoelectric material units. Meanwhile, as for the problem that the sensor based on the electromagnetic induction principle cannot detect signals at low rotating speed, the high piezoelectric constant and the good dynamic response performance of the piezoelectric material enable the rotating physical quantity measuring sensor to have high sensitivity and small hysteresis, and have high signal-to-noise ratio at low rotating speed. Meanwhile, the rotating physical quantity measuring sensor has the advantages of simple structure, small volume and low requirements on the process level in the aspects of manufacturing, processing and assembling, so that the rotating physical quantity measuring sensor is convenient to process, manufacture and assemble and has low manufacturing and using costs.
Drawings
Fig. 1 is a schematic structural view of a rotating physical quantity measuring sensor according to an embodiment of the present invention.
Fig. 2 is a schematic view of a string hole structure according to an embodiment of the present invention.
Fig. 3 is a connection block diagram of a piezoelectric signal portion of a rotating physical quantity measuring sensor according to an embodiment of the present invention.
Fig. 4 is a schematic view of a measurement state of a rotating physical quantity measuring sensor according to an embodiment of the present invention.
Wherein: 1-a rotor; 2-rotor cantilever beam; 3-a second magnetic component; 4-stator cantilever beam; 5-a stator; 6-a piezoelectric material unit; 7-a second insulating material unit; 8-a first magnetic component; a 9-wire hole; 10-auxiliary circuit; 11-a signal analysis module; 12-a display device; 13-first insulating material unit.
Detailed Description
In order to make the technical solutions of the present invention better understood, 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.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1 to 3, in an embodiment of the present invention, a rotating physical quantity measuring sensor is provided, which has the advantages of simple structure, easy processing and manufacturing, strong anti-interference capability, small volume, low cost, high precision, and the like, and has an important application potential in the fields of national defense industry, aerospace, on-line monitoring of mechanical rotating parts, and the like.
Specifically, the rotating physical quantity measuring sensor includes a signal analyzing module 11 and a rotor 1 and a stator 5 which are oppositely arranged. A plurality of stator cantilever beams 4 are circumferentially arranged on the stator 5; a plurality of rotor cantilever beams 2 opposite to the stator cantilever beams 4 are circumferentially arranged on the rotor 1, and a first magnetic part 8 is arranged at one end of each rotor cantilever beam 2 far away from the rotor 1; a first insulating material 13, a piezoelectric material unit 6, a second insulating material 7 and a second magnetic part 3 are sequentially arranged on one end of the stator cantilever beam 4 far away from the stator 5; the piezoelectric material unit 6 is provided with wires, and each wire is connected with the signal analysis module 11; the signal analysis module 11 is configured to obtain a rotation physical quantity of the rotor 1 according to the piezoelectric signal output by each piezoelectric material unit 6; the first magnetic part 8 and the second magnetic part 3 repel or attract each other.
Specifically, a first insulating material unit 13 is arranged between the piezoelectric material unit 6 and the stator cantilever beam 4, and a second insulating material unit 7 is arranged between the piezoelectric material unit 6 and the second magnetic component 3. The first insulating material 13 and the second insulating material 7 are used to ensure that the charge generated on the piezoelectric material unit 6 can only be finally transmitted to the signal analysis module 11 through the wires connected to the piezoelectric material unit 6.
In one possible embodiment, the stator 5 may be a non-rotating component, and the rotor 1 may be a rotating component fixed on the object to be measured and rotating synchronously with the object to be measured. The rotor 1 and the stator 5 are arranged opposite to each other at a distance. When the rotor 1 rotates with the object to be measured, the magnetic field of the first magnetic component 8 at the top end of each rotor cantilever beam 2 of the rotor 1 sequentially sweeps across the top ends of the stator cantilever beams 4. The magnetic field attracts or repels the second magnetic member 3, so that the second magnetic member 3 presses or stretches the piezoelectric material unit 6, and the piezoelectric material unit 6 generates a piezoelectric signal, and the piezoelectric signal is finally transmitted to the signal analysis module 11 through a wire.
The signal analysis module 11 is configured to analyze the piezoelectric signals output by each piezoelectric material unit 6, and perform time-frequency analysis and calculation on the piezoelectric signals output by different piezoelectric material units 6 of the stator 5, so as to accurately obtain the physical rotation quantity of the rotor 1, and when the rotor 1 is mounted on a rotating object, the physical rotation quantity of the rotating object can be accurately obtained. The rotation physical quantity generally includes a rotation speed, an angular displacement, an angular velocity, an angular acceleration, and the like.
In one possible embodiment, the rotor 1 may be used as a non-rotating component, and the stator 5 may be used as a rotating component fixed on the object to be measured and rotating synchronously with the object to be measured. The rotor and stator are only used to distinguish the two components and are not intended to be limited to specific connection locations and movement patterns during use.
It should be noted that the essence of the signal analysis module 11 is to perform time-frequency analysis and calculation on the piezoelectric signal, and the time-frequency analysis and calculation can be implemented by using an existing conventional time-frequency analysis processing device.
In one possible embodiment, the plurality of stator cantilevers 4 and the plurality of rotor cantilevers 2 are arranged circumferentially at equal angles. By adopting the mode of equal-angle circumferential arrangement, the piezoelectric signals output on each subsequent piezoelectric material unit 6 can be analyzed and processed conveniently, and the measurement precision is ensured.
In a possible embodiment, the rotor 1 and the stator 5 are both of hollow annular configuration. By adopting the hollow circular ring structure, the fixing device is convenient to fix on a rotating object and has light weight.
In a possible embodiment, the piezoelectric material unit 6 is a sheet structure, and includes a piezoelectric material and a metal electrode coated on the surface of the piezoelectric material, and the metal electrode is connected to the signal analysis module 11 through a wire.
In a possible embodiment, the first magnetic part 8 is a ferromagnetic metal block, a permanent magnet or an electromagnet; the second magnetic part 3 is a ferromagnetic metal block, a permanent magnet or an electromagnet.
Specifically, the first magnetic member 8 and the second magnetic member 3 are not limited in implementation, and generally, when the first magnetic member 8 is a permanent magnet or an electromagnet, the second magnetic member 3 may be configured as a permanent magnet, an electromagnet or a ferromagnetic metal block.
Similarly, the second magnetic member 3 may be a permanent magnet or an electromagnet, and the first magnetic member 8 may be a permanent magnet, an electromagnet, or a ferromagnetic metal block.
Wherein, when first magnetic part 8 is the electro-magnet, because the electro-magnet needs the circular telegram, can set up the line hole on rotor 1 to the power cord can provide the electric energy for the electro-magnet through the hollow structure of line hole and rotor cantilever beam 2.
In a possible embodiment, the stator cantilevers 4 are provided with first wire holes, the stator 5 is provided with a plurality of second wire holes corresponding to the first wire holes provided on each stator cantilever 4, and the wires sequentially pass through the first wire holes and the second wire holes to be connected with the auxiliary circuit (10) and the signal analysis module 11.
Specifically, the first wire guide hole and the second wire guide hole are communicated to form the wire hole 9, so that the guide and fixing effects of the wire are realized, and the installation and the use of the whole rotating physical quantity measuring sensor are facilitated.
In one possible embodiment, the rotating physical quantity measuring sensor further includes an auxiliary circuit 10; each lead is connected with a signal analysis module 11 through an auxiliary circuit 10; the auxiliary circuit 10 is an amplifying circuit, a noise reduction circuit, or an amplifying circuit and a noise reduction circuit connected to each other.
Specifically, can be so that piezoelectric signal is enlargied through adopting amplifier circuit, can be so that the noise in the piezoelectric signal is reduced through adopting the circuit of making an uproar that falls, further promotes the accuracy that follow-up rotation physical quantity measured. It should be noted that the amplifying circuit and the noise reduction circuit can both adopt the existing conventional circuit structure.
In a possible embodiment, the rotating physical quantity measuring sensor further includes a display device 12; and the display device 12 and the signal analysis module 11 are configured to receive the rotation physical quantity of the rotor 1 sent by the signal analysis module 11 and perform visual display.
Specifically, the display device 12, such as a display screen, may visually display the rotation physical quantity of the rotor 1 sent by the signal analysis module 11, so as to provide direct data information for the user.
In conclusion, the rotating physical quantity measuring sensor has the advantages of simple structure, small volume, low requirements on process level in the aspects of manufacturing, processing and assembling, and easiness in processing, manufacturing and assembling. The hardware parts such as the stator 5 and the rotor 1 are low in cost and easily available, and include only piezoelectric materials and magnets. Through analyzing the piezoelectric signals output by each piezoelectric material unit 6 of the stator 5, the synchronous measurement of rotation physical quantities such as rotating speed, angular displacement, angular velocity and angular acceleration can be realized, the response speed and the anti-interference capability are high, the measurement precision is high, and the method has important application potential in the fields of national defense industry, aerospace, mechanical equipment and the like.
Meanwhile, the piezoelectric material unit 6 is innovatively adopted as a conversion element, so that the problem of poor electromagnetic interference resistance of the electromagnetic sensor is solved. The rotating physical quantity measuring sensor of the present invention has excellent moisture resistance and corrosion resistance due to the excellent mechanical properties and environmental suitability of the piezoelectric material unit 6. Moreover, as for the problem that the sensor based on the electromagnetic induction principle cannot detect signals at low rotation speed, the high piezoelectric constant and the good dynamic response performance of the piezoelectric material unit 6 make the sensor for measuring the rotating physical quantity of the present invention have high sensitivity and small hysteresis, and have high signal-to-noise ratio at low rotation speed.
In addition, the rotating physical quantity measuring sensor can adjust the number of pairs of the stator cantilever beam 4 and the rotor cantilever beam 2, is suitable for measuring occasions with different measuring ranges and precision, has the advantages of small outline size, low installation requirement and the like, and has good application potential in various occasions and different environments.
In one possible embodiment, the present invention is described with respect to a rotating physical quantity measuring sensor, in which a shaft of an automobile engine is a rotating object to be measured. In the present embodiment, the first magnetic member 8 provided at the tip end of the rotor cantilever 2 of the rotor 1 is a permanent magnet, and in this case, the rotor cantilever 2 does not need to be provided with a wire hole. The rotor 1 and the shaft of the automobile engine to be measured are coaxially arranged, the stator 5 is fixed on the shell of the automobile engine, and the rotor 1 and the stator 5 are oppositely arranged at a certain distance without interfering the normal work of the shaft. When the rotor 1 rotates along with the shaft, the magnetic field of each first magnetic part 8 of the rotor 1 sequentially sweeps across the top ends of the stator cantilever beams 4, the magnetic field repels the second magnetic part 3, the second magnetic part 3 adopts a permanent magnet, and the ferromagnetic metal block extrudes the piezoelectric material unit 6, so that the piezoelectric material unit 6 generates a piezoelectric signal. In the present embodiment, the piezoelectric material unit 6 has a piezoelectric effect and is made of a piezoelectric material, a metal thin-film electrode is attached to a surface thereof, and a lead wire is attached to the metal thin-film electrode to output a piezoelectric signal. The data of the rotating speed, the angular displacement, the angular velocity, the angular acceleration and the like of the shaft of the automobile engine to be tested can be accurately obtained by performing time-frequency analysis and the like on the piezoelectric signals output by different piezoelectric material units 6 of the stator 5.
In another embodiment of the present invention, a sensor for measuring a rotating physical quantity is provided, which includes a signal analysis module 11, a stator 5 and a plurality of rotor cantilevers 2; one end of the rotor cantilever beam 2 is provided with a plurality of first magnetic parts 8, and the other end of the rotor cantilever beam is used for connecting the circumferential surface of an object to be detected; a plurality of stator cantilever beams 4 are circumferentially arranged on the inner wall of the stator 5, and the stator cantilever beams 4 are arranged along the radial direction of the stator 5 and face the circle center of the stator 5; a first insulating material 13, a piezoelectric material unit 6, a second insulating material 7 and a second magnetic part 3 are sequentially arranged on one end of the stator cantilever beam 4 far away from the stator 5; the piezoelectric material unit 6 is provided with leads, and each lead is connected with the signal analysis module 11; the signal analysis module 11 is configured to obtain a physical rotation quantity of the rotor 1 according to the piezoelectric signals output by the piezoelectric material units 6; the first magnetic part 8 and the second magnetic part 3 repel or attract each other; in the use state, the rotor cantilever beam 2 and the stator cantilever beam 4 are oppositely arranged.
Optionally, the plurality of rotor cantilevers 2 and the plurality of first magnetic members 8 are structural members of the object to be measured. That is, the rotor cantilever beam 2 and the first magnetic component 8 can be realized by adopting a magnetic structural component arranged in the circumferential direction of the object to be measured, and additional arrangement is not needed.
Specifically, referring to fig. 4, in one possible embodiment, a rotating physical quantity measuring sensor according to the present invention is described by taking as an example a rotating physical quantity measurement of a rotating shaft of a compressor having blades circumferentially provided therein.
In the embodiment, the rotor 1, the rotor cantilever 2 and the first magnetic component 8 are replaced by magnetic blades circumferentially arranged on the rotating shaft to be measured. The stator 5 is fixed on the shell of the compressor, and the stator cantilever beam 4 is arranged along the radial direction of the stator 5 and points to the circle center of the stator 5. When the rotor 1 rotates along with the shaft, the magnetic field of each first magnetic part 8 of the rotor 1 sequentially sweeps across the top end of the stator cantilever beam 4, the magnetic field attracts the second magnetic part 3, the second magnetic part 3 adopts a permanent magnet, the ferromagnetic metal block stretches the piezoelectric material unit 6, and then the piezoelectric material unit 6 generates a piezoelectric signal.
In the present embodiment, the piezoelectric material unit 6 has a piezoelectric effect and is made of a piezoelectric material, and a metal thin-film electrode is attached to a surface thereof, and a lead wire is attached to the metal thin-film electrode to output a piezoelectric signal. The data of the rotating speed, the angular displacement, the angular velocity, the angular acceleration and the like of the rotating shaft of the compressor to be detected can be accurately obtained by performing time-frequency analysis and the like on piezoelectric signals output by different piezoelectric material units 6 of the stator 5.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. A sensor for measuring the rotating physical quantity is characterized by comprising a signal analysis module (11), a rotor (1) and a stator (5) which are oppositely arranged;
a plurality of stator cantilever beams (4) are circumferentially arranged on the stator (5); a plurality of rotor cantilever beams (2) which are arranged opposite to the stator cantilever beams (4) are circumferentially arranged on the rotor (1), and a first magnetic part (8) is arranged at one end of each rotor cantilever beam (2) far away from the rotor (1); a first insulating material (13), a piezoelectric material unit (6), a second insulating material (7) and a second magnetic component (3) are sequentially arranged on one end, far away from the stator (5), of the stator cantilever beam (4); the piezoelectric material unit (6) is provided with leads, and each lead is connected with the signal analysis module (11); the signal analysis module (11) is used for obtaining the rotation physical quantity of the rotor (1) according to the piezoelectric signals output by the piezoelectric material units (6);
the first magnetic part (8) and the second magnetic part (3) repel each other or attract each other.
2. A rotating physical quantity measuring sensor according to claim 1, characterized in that the rotating physical quantity includes one or several of: rotational speed, angular displacement, angular velocity, and angular acceleration.
3. Rotating physical quantity measuring sensor according to claim 1, characterized in that the rotor (1) and the stator (5) are both of circular ring structure.
4. Rotating physical quantity measuring sensor according to claim 1, characterized in that the first magnetic part (8) is a ferromagnetic metal block, a permanent magnet or an electromagnet; the second magnetic part (3) is a ferromagnetic metal block, a permanent magnet or an electromagnet.
5. The rotating physical quantity measuring sensor according to claim 1, wherein the piezoelectric material unit (6) comprises a piezoelectric material and a metal electrode coated on the surface of the piezoelectric material, and the metal electrode is connected with the signal analysis module (11) through a lead.
6. The rotating physical quantity measuring sensor according to claim 1, wherein a first wire hole is formed in the stator cantilever (4), a plurality of second wire holes are formed in the stator (5), and wires sequentially pass through the first wire hole and the second wire holes to connect the piezoelectric material (6) with the signal analysis module (11).
7. The rotating physical quantity measuring sensor according to claim 1, further comprising an auxiliary circuit (10);
each lead is connected with a signal analysis module (11) through an auxiliary circuit (10); the auxiliary circuit (10) is an amplifying circuit, a noise reduction circuit or an amplifying circuit and a noise reduction circuit which are connected with each other.
8. The rotating physical quantity measuring sensor according to claim 1, further comprising a display device (12);
and the display device (12) is connected with the signal analysis module (11) and is used for receiving the rotation physical quantity of the rotor (1) sent by the signal analysis module (11) and carrying out visual display.
9. A sensor for measuring the rotation physical quantity is characterized by comprising a signal analysis module (11), a stator (5) and a plurality of rotor cantilever beams (2);
one end of the rotor cantilever beam (2) is provided with a plurality of first magnetic parts (8), and the other end of the rotor cantilever beam is used for connecting the circumferential surface of an object to be detected;
a plurality of stator cantilever beams (4) are circumferentially arranged on the inner wall of the stator (5), and the stator cantilever beams (4) are arranged along the radial direction of the stator (5) and face the circle center of the stator (5); a first insulating material (13), a piezoelectric material unit (6), a second insulating material (7) and a second magnetic component (3) are sequentially arranged on one end, far away from the stator (5), of the stator cantilever beam (4); the piezoelectric material unit (6) is provided with leads, and each lead is connected with the signal analysis module (11); the signal analysis module (11) is used for obtaining the rotation physical quantity of the rotor (1) according to the piezoelectric signals output by the piezoelectric material units (6);
the first magnetic part (8) and the second magnetic part (3) are mutually repulsive or attractive;
when in use, the rotor cantilever beam (2) and the stator cantilever beam (4) are oppositely arranged.
10. Rotating physical quantity measuring sensor according to claim 9, characterised in that the rotor cantilevers (2) and the first magnetic parts (8) are both structural parts of the object to be measured itself.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211559694.3A CN115792269A (en) | 2022-12-06 | 2022-12-06 | Rotating physical quantity measuring sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211559694.3A CN115792269A (en) | 2022-12-06 | 2022-12-06 | Rotating physical quantity measuring sensor |
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| CN115792269A true CN115792269A (en) | 2023-03-14 |
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| CN202211559694.3A Pending CN115792269A (en) | 2022-12-06 | 2022-12-06 | Rotating physical quantity measuring sensor |
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