CN217787577U - Motor device and projection equipment - Google Patents
Motor device and projection equipment Download PDFInfo
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- CN217787577U CN217787577U CN202221348671.3U CN202221348671U CN217787577U CN 217787577 U CN217787577 U CN 217787577U CN 202221348671 U CN202221348671 U CN 202221348671U CN 217787577 U CN217787577 U CN 217787577U
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Abstract
The application discloses provide a motor device and projection equipment, this motor device include the motor and with the detection device that the motor is connected, detection device includes: a first electrode mounted on a rotor of the motor; a second electrode fixed at a position opposite to the first electrode, the first electrode and the second electrode forming a capacitance, wherein an overlapping area of the first electrode and the second electrode or a distance between the first electrode and the second electrode is changed as the rotor rotates; and the control element is connected with the first electrode, the second electrode and the motor and is used for judging and adjusting the step number of the motor in real time according to the capacitance value and controlling the motor to rotate. A projection device comprises a lens, and the lens comprises the motor device. Through the technical means, the running step number of the motor can be effectively and accurately measured, and the control precision of the running step number of the motor can be effectively improved.
Description
Technical Field
The present disclosure relates to motor step detection, and more particularly to a motor device and a projection apparatus.
Background
The method is applied to automatic focusing in projection, whether a focusing scheme of a time of flight (TOF) method or a camera is used, the control relation between the lens step number and the focusing distance is required to be accurate, and the focusing step can be quickly and accurately completed.
SUMMERY OF THE UTILITY MODEL
The application provides a motor device, this motor device has the function of accurate measurement and calculation motor step number and control motor.
In order to solve the technical problem, the technical scheme adopted by the application is as follows: there is provided a motor device including a motor and a detection device connected to the motor, the detection device including: the first electrode is arranged on a rotor of the motor; the second electrode is fixed on a position opposite to the first electrode, and the first electrode and the second electrode form a capacitor, wherein the overlapping area of the first electrode and the second electrode or the distance between the first electrode and the second electrode changes along with the rotation of the rotor, so that the capacitance value of the capacitor changes along with the rotation of the rotor; and the control element is connected with the first electrode, the second electrode and the motor and is used for judging and adjusting the step number of the motor in real time according to the capacitance value and controlling the motor to rotate.
The detection device comprises a capacitance sensor, the control element is connected with the first electrode and the second electrode through the capacitance sensor, and the capacitance sensor is used for acquiring the capacitance value of the capacitor.
Wherein the first electrode comprises a first sheet electrode and the second electrode comprises a second sheet electrode; the first sheet electrode rotates following the rotor to change the overlapping area of the first electrode and the second electrode.
The first sheet electrode and the second sheet electrode are semicircular, and the circle center of the first sheet electrode and the circle center of the second sheet electrode are coaxial with the rotor.
The first sheet electrode rotates along with the rotor to enable the overlapping area of the first sheet electrode and the second sheet electrode to change or the overlapping area of the first sheet electrode and the third sheet electrode to change.
The first sheet electrode, the second sheet electrode and the third sheet electrode are semicircular, the second sheet electrode and the third sheet electrode are arranged circumferentially, and the first sheet electrode, the second sheet electrode and the third sheet electrode are arranged coaxially with the rotor.
The first electrode comprises a sheet electrode arranged along the axial direction of the rotor and around the rotating shaft of the rotor, and the first electrode rotates along with the rotor so that the distance between the first electrode and the second electrode is changed.
The second electrode is deviated from the axis of the sheet electrode and is arranged opposite to the sheet electrode.
The detection device comprises a driving chip which is connected with the control element and used for driving the motor.
In order to solve the technical problem, the technical scheme adopted by the application is as follows: a projection device is provided, which comprises a lens, wherein the lens comprises the motor device.
The beneficial effects of the embodiment of the application are that: the detection device comprises a first electrode and a second electrode, the first electrode is arranged on a rotor of the motor, the second electrode is fixed at a position opposite to the first electrode, the first electrode and the second electrode form a capacitor, one of the overlapping area of the first electrode and the second electrode or the distance between the first electrode and the second electrode changes along with the first electrode and the second electrode when the first electrode rotates along with the rotor, so that the capacitance value of the capacitor changes, each different capacitance value corresponds to the relative rotation position of the rotor, the relative rotation position of the rotor is determined according to the different capacitance values, and the running steps of the motor are effectively and accurately measured. The detection device also comprises a control element, wherein the control element is respectively connected with the first electrode, the second electrode and the motor, on one hand, the capacitance value of the capacitor can be constantly transmitted into the control element, the control element can record and process the change condition of the capacitance values and obtain accurate motor step number, and on the other hand, the control element controls the motor to correct the operation step number or control the motor to normally operate according to the operation step number condition of the motor. Through the motor device, the step number of the motor can be more accurately counted, and meanwhile, the control precision of the running step number of the motor is effectively improved.
Drawings
FIG. 1 is a schematic structural diagram of a first embodiment of the detecting device of the present application;
FIG. 2 is a schematic structural diagram of a second embodiment of the detecting device of the present application;
FIG. 3 is a schematic structural diagram of a third embodiment of the detecting unit of the present application;
FIG. 4 is a schematic diagram showing the relative positions of a first electrode and a second electrode in a third embodiment of the detecting unit of the present application;
fig. 5 is a schematic structural diagram of an embodiment of a first electrode of a detection device in a third embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
The terms "first", "second" and "first" in this application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover an exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
The present application provides a motor device, as shown in fig. 1, fig. 1 is a schematic structural diagram of a first embodiment of a detection device of the present application; wherein, this motor means includes the motor and with the detection device 600 that the motor is connected, detection device 600 includes: a first electrode 100, a second electrode 200 and a control element 300.
Wherein the first electrode 100 is mounted on the rotor of the motor; the second electrode 200 is fixed at a position opposite to the first electrode 100, and the first electrode 100 and the second electrode 200 form a capacitance, wherein the overlapping area of the first electrode 100 and the second electrode 200 or the distance between the first electrode 100 and the second electrode 200 changes with the rotation of the rotor; and a control element 300 connected to the first electrode 100, the second electrode 200 and the motor for controlling the motor.
Specifically, for example, as shown in fig. 1, the first electrode 100 is coaxially disposed on the motor rotor, the second electrode 200 is disposed on the motor stator (the fixed position of the second electrode 200 is not necessarily on the motor stator, and it may be a part of the motor other than the rotor, such as a casing of the motor, which is fixed relative to the stator), and is disposed opposite to the first electrode 100, so that the areas of the projections of the first electrode 100 and the second electrode 200 along the motor rotor axial direction coincide with each other, and the first electrode 100 and the second electrode 200 have a certain distance along the motor rotor axial direction, so as to form a capacitor. The motor rotor rotates and drives the first electrode 100 to rotate along with the motor rotor, so as to change one of the technical characteristics of the overlapping area of the first electrode 100 and the second electrode 200 or the distance between the first electrode 100 and the second electrode 200, so that the capacitance value of the capacitor corresponds to each rotation angle (rotation angle relative to the stator) of the motor rotor. The control unit 300 obtains the above capacitance value by signal connection with the first electrode 100 and the second electrode 200, so as to determine the rotation condition of the motor rotor (i.e. the angle of the motor rotor rotating relative to the stator, i.e. the number of operating steps of the motor), and the control unit 300 records and compares the capacitance value, so as to record the number of steps of the motor and send out a control signal to control the operation of the motor.
For example, assuming that the first electrode 100 rotates with the rotor, so that the capacitance value changes and gradually increases, before the motor starts to operate, the number of steps of the motor is Y and is recorded by the control element 300, the capacitance value of the capacitor is X1 and is recorded by the control element 300, after the motor starts to operate, the number of steps of the motor is Y +1 and is recorded by the control element 300, and the capacitance value is X2 and is recorded by the control element 300, the detection device 600 of the first electrode 100, the second electrode 200 and the control element 300 continuously operate. The control element 300 records the capacitance values X1 and X2 and compares the magnitudes of X1 and X2, if X1 is equal to X2 or X2 is smaller than X1, the control element 300 may determine that the rotor and the stator do not rotate relatively, i.e., the motor is in an out-of-step state or an out-of-step state (i.e., the rotor does not rotate relative to the stator or the rotor rotates in reverse direction relative to the rotor), and then the control element 300 corrects the step number Y record of the motor (e.g., corrects the step number Y +1 to Y or Y-1), and generates a control signal to control the motor to operate according to the correct step number (e.g., if the step number that the user needs to rotate the motor is Y +1, the control element 300 controls the motor to operate to rotate the rotor to a position corresponding to Y +1, but not to a position corresponding to Y or Y-1). The above description is merely for illustration and does not limit the detection and control method of the detection apparatus 600 of the present application.
Different from the prior art, the present application provides a motor apparatus 10, which includes a motor and a detection apparatus 600 connected to the motor, where the detection apparatus 600 includes a first electrode 100 and a second electrode 200, the first electrode 100 is installed on a rotor of the motor, and the second electrode 200 is fixed at a position opposite to the first electrode 100, where the first electrode 100 and the second electrode 200 form a capacitor, and when the first electrode 100 rotates along with the rotor, one of an overlapping area of the first electrode 100 and the second electrode 200 or a distance between the first electrode 100 and the second electrode 200 changes accordingly, so as to change a capacitance value of the capacitor, where each different capacitance value corresponds to a relative rotation position of the rotor, thereby determining the relative rotation position of the rotor in real time, and effectively and accurately measuring the number of operation steps of the motor. The detecting device 600 further includes a control element 300, the control element 300 is respectively connected to the first electrode 100, the second electrode 200 and the motor, on one hand, the capacitance of the capacitor is constantly transmitted to the control element 300, the control element 300 records and processes the change of the capacitance and obtains the accurate motor operation steps, on the other hand, the control element 300 controls the motor to correct the steps or control the motor to normally operate according to the motor operation steps. Through the motor device, the step number of the motor can be more accurately counted, and meanwhile, the control precision of the running step number of the motor is effectively improved.
Optionally, as shown in fig. 1, the detecting device 600 includes a capacitance sensor 400, the control element 300 is connected to the first electrode 100 and the second electrode 200 through the capacitance sensor 400, and the capacitance sensor 400 is used for acquiring a capacitance value of the capacitance.
Alternatively, as shown in fig. 1, the first electrode 100 includes a first sheet electrode 110, and the second electrode 200 includes a second sheet electrode 210; the first sheet electrode 110 rotates following the rotor to vary the overlapping area of the first electrode 100 and the second electrode 200.
Alternatively, as shown in fig. 1, the first sheet electrode 110 and the second sheet electrode 210 are semicircular, and the center of the first sheet electrode 110 and the center of the second sheet electrode 210 are coaxial with the rotor.
The first electrode 100 and the second electrode 200 are arranged according to the arrangement method set forth in the above description, wherein the first electrode 100 and the second electrode 200 may be embodied as a semicircular first laminar electrode 110 and a semicircular second laminar electrode 210. The sheet surfaces of the first sheet electrode 110 and the second sheet electrode 210 are perpendicular to the axial direction of the rotor, the first sheet electrode 110 rotates synchronously with the rotor, the overlapping area of the projections of the first sheet electrode 110 and the second sheet electrode 210 along the axial direction of the rotor periodically changes, that is, the overlapping area of the projections of the first sheet electrode 110 and the second sheet electrode 210 along the axial direction of the rotor gradually increases until the maximum value and then gradually decreases to zero (or gradually decreases until the maximum value and then gradually increases) along with the rotation of the rotor, so that the capacitance value of the capacitor is always uniquely corresponding to the number of steps of the motor. The capacitance of the capacitor is collected by the capacitive sensor 400 and transmitted to the control element 300, so as to implement the function of the detection device 600.
Different from the prior art, while the detection apparatus 600 in the first embodiment of the present application includes the technical features set forth above, the detection apparatus 600 further includes the semicircular first sheet electrode 110 and the semicircular second sheet electrode 210, the first sheet electrode 110 rotates synchronously with the rotor, the overlapping area of the projections of the first sheet electrode 110 and the second sheet electrode 210 along the axial direction of the rotor changes periodically, and the areas of the projections of the semicircular first sheet electrode 110 and the semicircular second sheet electrode 210 along the axial direction of the rotor have mutual circumferential properties, so that the capacitance value of the capacitor always uniquely corresponds to the step number of the motor, thereby ensuring the integrity of the detection apparatus 600 detecting the step number of the motor. In this embodiment, the detection device 600 is further provided with the capacitance sensor 400, so that the detection precision of the capacitance value is greatly improved, and the precision of detecting the number of steps of the motor by the detection device 600 is effectively improved.
Optionally, as shown in fig. 2, fig. 2 is a schematic structural diagram of a second embodiment of the detection apparatus of the present application; the first electrode 100 includes a first sheet electrode 110, the second electrode 200 includes a second sheet electrode 210 and a third sheet electrode 220, the first sheet electrode 110 and the second sheet electrode 210 form a first capacitance, the first sheet electrode 110 and the third sheet electrode 220 form a second capacitance, and the first sheet electrode 110 rotates along with the rotor to change the overlapping area of the first sheet electrode 110 and the second sheet electrode 210 or the overlapping area of the first sheet electrode 110 and the third sheet electrode 220.
Alternatively, as shown in fig. 2, the first sheet electrode 110, the second sheet electrode 210, and the third sheet electrode 220 are semicircular, the second sheet electrode 210 and the third sheet electrode 220 are circumferentially disposed with each other, and the first sheet electrode 110, the second sheet electrode 210, and the third sheet electrode 220 are coaxially disposed with the rotor.
Unlike the first embodiment of the motor apparatus of the present application, the second electrode 200 of the detecting apparatus 600 in the second embodiment of the motor apparatus of the present application includes two semicircular second and third sheet electrodes 210 and 220. The second sheet electrode 210 and the third sheet electrode 220 are arranged coaxially and circumferentially with the rotor on the stator, and the first sheet electrode 110 is arranged to face each other, so that the first sheet electrode 110 and the second sheet electrode 210 form a first capacitance, and the first sheet electrode 110 and the third sheet electrode 220 form a second capacitance.
The first capacitor and the second capacitor are respectively connected to the capacitive sensor 400, and the capacitive sensor transmits the capacitance value of the first capacitor and the capacitance value of the second capacitor to the control element 300 for recording. It should be noted that, in the embodiment, as the first sheet electrode 110 rotates along with the rotor, the first capacitance and the second capacitance change periodically, and the changes of the first capacitance and the second capacitance are opposite in synchronization, for example, as the rotor rotates, the first capacitance gradually increases until the maximum value and then gradually decreases to zero, and the second capacitance gradually decreases until the maximum value and then gradually increases until the maximum value. The control element 300 determines the number of steps of the motor according to the variation of the first capacitance and the second capacitance, and generates a corresponding control signal to control the motor to operate. The control unit 300 can determine the relative position relationship between the rotor and the stator by using any one of the two capacitance values and adopting the method. Meanwhile, the detection device 600 with two capacitance values also reduces the accuracy requirement of the capacitance sensor 400 to a certain extent, and simultaneously greatly improves the accuracy of the control element 300 in recording and controlling the number of steps of the motor to a certain extent.
While the second embodiment of the motor apparatus of the present application has the above-mentioned functional features of the first embodiment of the motor apparatus of the present application, the second electrode 200 includes the second sheet electrode 210 and the third sheet electrode 220 to form the first capacitor and the second capacitor. Under the combined action of the first capacitor and the second capacitor, the accuracy requirement of the capacitive sensor 400 is reduced to a certain extent, and the accuracy of the control element 300 for recording and controlling the number of steps of the motor is greatly improved to a certain extent.
Alternatively, as shown in fig. 3 and fig. 4, fig. 3 is a schematic structural diagram of a third embodiment of the detection apparatus of the present application; FIG. 4 is a schematic view of the relative positions of a first electrode and a second electrode in a third embodiment of the motor apparatus of the present application; the first electrode 100 includes a sheet electrode 130 disposed along the axial direction of the rotor and around the rotational axis of the rotor, and the first electrode 100 rotates with the rotor so that the distance between the first electrode 100 and the second electrode 200 varies.
Optionally, as shown in fig. 5, fig. 5 is a schematic structural diagram of an embodiment of a first electrode of a detection apparatus in a third embodiment of the present application; the sheet electrode 130 is spiral, the sheet electrode 130 is arranged coaxially with the rotor, and the second electrode 200 is arranged opposite to the sheet electrode 130 with an offset from the axis of the sheet electrode 130.
As shown in fig. 3, 4 and 5, in some embodiments, the first electrode 100 specifically includes a sheet-like electrode 130 and a positioning pillar 140, and the sheet-like electrode 130 is spirally wound around the positioning pillar 140 to form the first electrode 100. The first electrode 100 and the rotor are coaxially arranged on the rotor, the second electrode 200 deviates from the axis of the first electrode 100 so that the second electrode 200 is always opposite to the sheet-shaped electrode 130, so that the projection area of the second sheet-shaped electrode 130 and the first electrode 100 along the axial direction of the rotor is not changed, and along with the rotation of the rotor, the regions of the sheet-shaped electrode 130 with different distances along the axial direction of the rotor are opposite to the second electrode 200, so as to form a capacitor with a capacitance value changing along with the distance. The changed capacitance is transmitted to the control element 300 through the capacitance sensor 400, and the control element 300 records and controls the step number of the motor according to the capacitance, and the specific recording and controlling method refers to the above contents, which are not described herein again.
Optionally, the detection device 600 includes a driving chip 500, which is connected to the control unit 300 for driving the motor.
The control unit 300 generates a control signal and transmits the control signal to the driving chip 500, and the driving chip 500 drives the motor to operate and adjusts the number of steps of the motor according to the control signal and a built-in program.
In summary, different from the prior art, the motor apparatus of the present application includes a motor and a detection apparatus 600 connected to the motor, where the detection apparatus 600 includes a first electrode 100 and a second electrode 200, the first electrode 100 is mounted on a rotor of the motor, and the second electrode 200 is fixed at a position opposite to the first electrode 100, where the first electrode 100 and the second electrode 200 form a capacitor, and when the first electrode 100 rotates along with the rotor, one of an overlapping area of the first electrode 100 and the second electrode 200 or a distance between the first electrode 100 and the second electrode 200 changes accordingly, so as to change a capacitance value of the capacitor, where each different capacitance value corresponds to a relative rotation position of the rotor, thereby determining the relative rotation position of the rotor according to the different capacitance values, and effectively and accurately calculating the number of operation steps of the motor. The detecting device 600 further includes a control element 300, the control element 300 is respectively connected to the first electrode 100, the second electrode 200 and the motor, on one hand, the capacitance value of the capacitor is constantly transmitted to the control element 300, the control element 300 records and processes the variation of the capacitance value and obtains the accurate running steps of the motor, on the other hand, the control element 300 controls the motor to correct the steps or control the motor to normally run according to the running steps of the motor. Through the motor device, the step number of the motor can be more accurately counted, and meanwhile, the control precision of the running step number of the motor is effectively improved. And in some embodiments, the second electrode 200 includes a second tab electrode 210 and a third tab electrode 220 to form a first capacitance and a second capacitance. Under the combined action of the first capacitor and the second capacitor, the accuracy requirement of the capacitive sensor 400 is reduced to a certain extent, and the accuracy of the control element 300 for recording and controlling the number of steps of the motor is greatly improved to a certain extent.
The application provides a projection device, and this projection device includes the camera lens, and the camera lens includes above-mentioned detection device 600.
It should be noted that the drawings are only for illustrating the structural relationship and the connection relationship of the product of the present invention, and do not limit the specific structural dimensions of the product of the present invention.
The above-mentioned embodiment of the present invention is only, and not the scope of the patent of the present invention is limited, all the equivalent structures or equivalent processes made by the contents of the specification and the drawings are utilized, or directly or indirectly applied to other related technical fields, and all the same principles are included in the patent protection scope of the present invention.
Claims (10)
1. A motor apparatus, comprising a motor and a detection apparatus connected to the motor, the detection apparatus comprising:
a first electrode mounted on a rotor of the motor;
a second electrode fixed at a position opposite to the first electrode, the first electrode and the second electrode forming a capacitor, wherein an overlapping area of the first electrode and the second electrode or a distance between the first electrode and the second electrode is changed with the rotation of the rotor, so that a capacitance value of the capacitor is changed with the rotation of the rotor;
and the control element is connected with the first electrode, the second electrode and the motor, and is used for judging and adjusting the step number of the motor in real time according to the capacitance value and controlling the motor to rotate.
2. The motor device according to claim 1, wherein the detection device comprises a capacitance sensor, and the control element is connected to the first electrode and the second electrode through the capacitance sensor, and the capacitance sensor is configured to obtain a capacitance value of the capacitance.
3. The motor apparatus of claim 2, wherein the first electrode comprises a first sheet electrode and the second electrode comprises a second sheet electrode;
the first sheet electrode rotates following the rotor to change the overlapping area of the first electrode and the second electrode.
4. The motor device according to claim 3, wherein the first sheet electrode and the second sheet electrode are semicircular, and the center of the first sheet electrode and the center of the second sheet electrode are coaxially arranged with the rotor.
5. The motor device according to claim 2, wherein the first electrode includes a first sheet electrode, the second electrode includes a second sheet electrode and a third sheet electrode, the first sheet electrode and the second sheet electrode form a first capacitance, the first sheet electrode and the third sheet electrode form a second capacitance, and the first sheet electrode rotates with the rotor to change an overlapping area of the first sheet electrode and the second sheet electrode or change an overlapping area of the first sheet electrode and the third sheet electrode.
6. The motor device according to claim 5, wherein the first, second and third sheet electrodes are semicircular, the second and third sheet electrodes are circumferentially arranged with each other, and the first, second and third sheet electrodes are coaxially arranged with the rotor.
7. The motor apparatus according to claim 2, wherein the first electrode includes a sheet electrode disposed along an axial direction of the rotor and around a rotational axis of the rotor, and the first electrode rotates with the rotor to vary a distance between the first electrode and the second electrode.
8. The motor device according to claim 7, wherein the sheet electrode has a spiral shape, the sheet electrode is arranged coaxially with the rotor, and the second electrode is disposed opposite to the sheet electrode with an offset from an axial center of the sheet electrode.
9. The motor apparatus of any one of claims 1-8, wherein the detection device comprises a driving chip connected to the control element for driving the motor.
10. A projection device comprising a lens, said lens comprising the motor apparatus of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221348671.3U CN217787577U (en) | 2022-05-30 | 2022-05-30 | Motor device and projection equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221348671.3U CN217787577U (en) | 2022-05-30 | 2022-05-30 | Motor device and projection equipment |
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| Publication Number | Publication Date |
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| CN217787577U true CN217787577U (en) | 2022-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221348671.3U Active CN217787577U (en) | 2022-05-30 | 2022-05-30 | Motor device and projection equipment |
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| CN (1) | CN217787577U (en) |
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2022
- 2022-05-30 CN CN202221348671.3U patent/CN217787577U/en active Active
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