A galvanometer motor

Abstract

The utility model relates to the technical fields of galvanometer motor disclose a kind of galvanometer motor, motor rotating shaft, shell, light source piece and first position sensor, motor rotating shaft is connected in shell, and the both ends of motor rotating shaft are respectively connected with first lens and second lens, light source piece, first lens and first position sensor are located at the same end of shell, light source piece and first position sensor are respectively arranged on the both sides of motor rotating shaft, first position sensor is equipped with first signal receiving surface, light source piece is equipped with luminous surface, luminous surface is towards first signal receiving surface setting, light source piece is configured as emission beam, emission beam is incident to first signal receiving surface after passing through first lens.The utility model discloses galvanometer motor, light source piece and first position sensor are located at the same side of shell, optical path structure is simple, beneficial to system miniaturization and modularization integration.

Description

Technical Field

[0001] This utility model relates to the technical field of galvanometer motors, and in particular to a galvanometer motor. Background Technology

[0002] A galvanometer motor is a drive device capable of precisely controlling the deflection angle of a reflector, widely used in laser projection, 3D scanning, medical imaging, and micromachining. To achieve high-precision control, an angle detection component is typically required to provide position feedback. Common detection methods include optical and non-optical types. Optical detection usually employs a structure combining a light source and a position sensor. The deflection angle of the lens is calculated by detecting the displacement of the light spot after the beam is reflected by the reflector. In some solutions, the reflector is integrated into the motor shaft, rotating synchronously with the shaft. The light beam emitted by the light source illuminates the mirror surface and is reflected back to the position sensor, forming a closed-loop feedback circuit. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. It provides a galvanometer motor in which the light source and the first position sensor are located on the same side of the housing, resulting in a simple optical path structure that facilitates system miniaturization and modular integration.

[0004] To achieve the above objectives, this utility model provides a galvanometer motor, comprising a motor shaft, a housing, a light source, and a first position sensor. The motor shaft is connected to the housing, and a first lens and a second lens are respectively connected to both ends of the motor shaft. The light source, the first lens, and the first position sensor are located at the same end of the housing. The light source and the first position sensor are respectively arranged opposite to each other on both sides of the motor shaft. The first position sensor has a first signal receiving surface, and the light source has a light emitting surface facing the first signal receiving surface. The light source is configured to emit a light beam, and the emitted light beam passes through the first lens and then enters the first signal receiving surface.

[0005] As a preferred embodiment, the first lens has a first light-transmitting surface and a second light-transmitting surface that are disposed opposite to each other, and the first light-transmitting surface and the second light-transmitting surface are parallel to each other.

[0006] As a preferred embodiment, the housing includes a main housing and a first cover. The first cover is connected to one end of the main housing and has an assembly cavity. The main housing has an axially extending through groove, one end of which communicates with the assembly cavity. The motor shaft is rotatably connected to the through groove, and one end of the motor shaft extends into the assembly cavity and is connected to the first lens. The first position sensor and the light source are respectively connected to the assembly cavity. The second lens is connected to the end of the main housing away from the first cover.

[0007] As a preferred embodiment, a circuit board is connected between the main housing and the first cover. The circuit board has a first through hole. One end of the motor shaft extends into the assembly cavity through the first through hole and is connected to the first lens. The motor shaft, the first position sensor, and the light source are respectively electrically connected to the circuit board.

[0008] As a preferred embodiment, the edge of the first cover is provided with a first cavity, the first position sensor is connected to the first cavity, the first cavity is provided with a first sensing port and a first connecting hole, the first sensing port and the first connecting hole are respectively connected to the first cavity, the first sensing port is connected to the assembly cavity, the position of the first sensing port is corresponding to the first signal receiving surface, the first sensing port extends circumferentially along the assembly cavity, the first connecting hole is disposed facing the circuit board, and the first position sensor is electrically connected to the circuit board through the first connecting hole.

[0009] As a preferred embodiment, the edge of the first cover is provided with a second cavity, the light source is connected to the second cavity, the second cavity is provided with a light outlet and a second connection hole respectively communicating with the second cavity, the light outlet is communicated with the assembly cavity, the position of the light outlet is corresponding to the position of the light-emitting surface, the second connection hole is arranged facing the circuit board, and the light source is electrically connected to the circuit board through the second connection hole.

[0010] As a preferred embodiment, one end of the motor shaft extending into the assembly cavity is connected to a lens clamp, the lens clamp having a lens clamping groove, and the first lens being connected to the lens clamping groove.

[0011] As a preferred embodiment, the housing further includes a second cover, which is connected to the end of the main housing away from the first cover. The second cover has a second through hole, through which one end of the motor shaft extends out of the housing and is connected to the second lens.

[0012] As a preferred embodiment, the circuit board is connected to a second position sensor, which is connected to the assembly cavity. The light source, the first position sensor, and the second position sensor are arranged sequentially along the circumference of the housing. The second position sensor is provided with a second signal receiving surface, which is positioned facing the first lens.

[0013] As a preferred embodiment, the edge of the first cover is provided with a third cavity, the second position sensor is connected to the third cavity, the third cavity is provided with a second sensing port and a third connecting hole, the second sensing port and the third connecting hole are respectively connected to the third cavity, the second sensing port is connected to the assembly cavity, the position of the second sensing port is corresponding to the second signal receiving surface, the second sensing port extends circumferentially along the assembly cavity, the third connecting hole is set towards the circuit board, and the second position sensor is electrically connected to the circuit board through the third connecting hole.

[0014] Compared with the prior art, the galvanometer motor of this utility model has the following advantages: it includes a housing, a motor, a motor shaft, a light source, a first lens, and a first position sensor. The motor is connected to the housing, and the motor's rotation output end is connected to the motor shaft. The first lens and the second lens are respectively fixed to both ends of the motor shaft, and the first lens and the second lens rotate synchronously with the motor shaft. The light source and the first position sensor are located at the same end of the housing, and the light source and the first position sensor are respectively arranged opposite to each other on both sides of the motor shaft. The first position sensor has a first signal receiving surface, and the light source has a light emitting surface, which faces the first signal receiving surface. The light source is configured to emit a light beam, which passes through the first lens and then enters the first signal receiving surface. Alternatively, the light source can emit a parallel light beam, which is emitted from the light emitting surface. This beam illuminates the first lens at a certain incident angle, is refracted and transmitted through the first lens, and then exits. The exiting light is parallel to the incident light and produces a lateral displacement. This transmitted light beam enters the first signal receiving surface of the first position sensor. When the motor shaft drives the first lens to rotate, the incident angle changes, causing a corresponding change in the offset of the transmitted beam, which in turn moves the position of the light spot on the photosensitive surface of the first position sensor. By pre-calibrating the correspondence between the light spot displacement and the lens deflection angle, an angle detection model is established in the control system to achieve real-time feedback of the motor shaft position and speed. This scheme uses a transmission optical path for angle detection, with the light source and the first position sensor located on the same side of the housing. The optical path structure is simple, which is beneficial for system miniaturization and modular integration. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0016] Figure 2 This is a schematic cross-sectional view of an embodiment of the present invention.

[0017] Figure 3 This is a schematic diagram of the structure after the first cover is opened according to an embodiment of the present invention.

[0018] Figure 4 This is a structural schematic diagram of one side of the first cover body in an embodiment of this utility model.

[0019] Figure 5 This is a schematic diagram of the structure of the other side of the first cover in this embodiment of the utility model.

[0020] In the picture: 10. Motor shaft; 11. First lens; 12. First light-transmitting surface; 13. Second light-transmitting surface; 14. Second lens; 15. Lens clip; 16. Lens clip groove; 20. Housing; 21. Main housing; 22. Shaft through groove; 23. First cover; 24. Assembly cavity; 25. First cavity; 26. First sensing port; 27. First connecting hole; 28. Second cavity; 29. ​​Light outlet; 30. Second connecting hole; 31. Third cavity; 32. Second sensing port; 33. Third connecting hole; 34. Second cover; 35. Second through hole; 40. Light source component; 41. Light-emitting surface; 50. First position sensor; 51. First signal receiving surface; 60. Second position sensor; 61. Second signal receiving surface; 70. Circuit board; 71. First through hole; Detailed Implementation

[0021] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, it should be understood that the terms "connected," "linked," and "fixed," etc., used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or a welded connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] like Figures 1 to 5 As shown, a preferred embodiment of the present invention provides a galvanometer motor, comprising a motor shaft 10, a housing 20, a light source 40, and a first position sensor 50. The motor shaft 10 is connected to the housing 20, and a first lens 11 and a second lens 14 are respectively connected to both ends of the motor shaft 10. The light source 40, the first lens 11, and the first position sensor 50 are located at the same end of the housing 20. The light source 40 and the first position sensor 50 are respectively arranged opposite to each other on both sides of the motor shaft 10. The first position sensor 50 is provided with a first signal receiving surface 51, and the light source 40 is provided with a light emitting surface 41, which is arranged facing the first signal receiving surface 51. The light source 40 is configured to emit a light beam, which passes through the first lens 11 and then enters the first signal receiving surface 51.

[0025] The galvanometer motor of this invention includes a housing 20, a motor, a motor shaft 10, a light source 40, a first lens 11, and a first position sensor 50. The motor is connected to the housing 20, and the motor's rotation output end is connected to the motor shaft 10. The first lens 11 and the second lens 14 are respectively fixed to both ends of the motor shaft 10, and the first lens 11 and the second lens 14 rotate synchronously with the motor shaft 10. The light source 40 and the first position sensor 50 are located at the same end of the housing 20, and are respectively arranged opposite to each other on both sides of the motor shaft 10. The first position sensor 50 is provided with a first signal receiving surface 51, and the light source 40 is provided with a light emitting surface 41, which faces the first signal receiving surface 51. The light source 40 is configured to emit a light beam, which passes through the first lens 11 and then enters the first signal receiving surface 51. The light source 40 is configured to emit a parallel light beam, which is emitted from the light-emitting surface 41. This beam illuminates the first lens 11 at a certain incident angle, and after refraction and transmission by the first lens 11, it exits. The exiting light is parallel to the incident light and produces a lateral displacement. This transmitted beam is incident on the first signal receiving surface 51 of the first position sensor 50. When the motor shaft 10 drives the first lens 11 to rotate, the incident angle changes, causing a corresponding change in the lateral displacement, i.e., the offset, of the transmitted beam, thereby moving the position of the light spot on the photosensitive surface of the first position sensor 50. By pre-calibrating the correspondence between the light spot offset and the lens deflection angle, an angle detection model is established in the control system to achieve real-time feedback of the position and speed of the motor shaft 10. This scheme uses a transmission optical path for angle detection. The light source 40 and the first position sensor 50 are both located on the same side of the housing 20, resulting in a simple optical path structure that is beneficial for system miniaturization and modular integration.

[0026] The formula for calculating the offset is existing technology.

[0027] As one embodiment, such as Figures 1 to 3As shown, the first lens 11 is a beam splitter, and the second lens 14 is a galvanometer.

[0028] Furthermore, such as Figure 3 As shown, the first lens 11 has a first light-transmitting surface 12 and a second light-transmitting surface 13 arranged opposite to each other, and the first light-transmitting surface 12 and the second light-transmitting surface 13 are parallel to each other. Incident light is obliquely incident on the first light-transmitting surface 12 at a certain angle, resulting in a first refraction; after propagating a certain thickness within the first lens 11, the beam exits from the second light-transmitting surface 13, resulting in a second refraction; according to the principles of geometric optics, the direction of the outgoing light is parallel to the direction of the incident light, but a lateral displacement d is generated; this lateral displacement d changes with the incident angle, which is determined by the rotation angle of the first lens 11 with the motor shaft 10. Therefore, by detecting the position change of the transmitted light spot on the first position sensor 50, the deflection angle of the lens can be deduced. Since the first light-transmitting surface 12 and the second light-transmitting surface 13 are parallel to each other, the outgoing beam after transmission through the first lens 11 remains parallel to the incident beam, ensuring that the transmitted light spot stably falls within the photosensitive area of ​​the first signal receiving surface 51 of the first position sensor 50, thus improving the reliability of signal reception.

[0029] Furthermore, such as Figures 1 to 5 As shown, the housing 20 includes a main housing 21 and a first cover 23. The first cover 23 is connected to one end of the main housing 21 and has an assembly cavity 24. The main housing 21 has an axially extending through groove 22. A motor shaft 10 is rotatably connected to the through groove 22, and one end of the motor shaft 10 extends into the assembly cavity 24 and is connected to a first lens 11. A first position sensor 50 and a light source 40 are respectively connected within the assembly cavity 24. A second lens 14 is connected to the end of the main housing 21 away from the first cover 23. The first lens 11 is used for angle feedback detection, and the second lens 14 is used for laser reflection scanning. The second lens 14 is installed at the end of the main housing 21 away from the first lens 11, which facilitates the replacement or adaptation of reflectors with different optical parameters. By placing the light source 40, the first position sensor 50, and the first lens 11 within the assembly cavity 24 formed by the main housing 21 and the first cover 23, modular packaging of the optical detection unit is achieved. The through groove 22 on the main housing 21 provides axial guidance and radial support for the motor shaft 10, ensuring that it rotates smoothly during high-speed deflection, reducing vibration and sway, thereby improving the repeatability of angle detection and the long-term working stability of the system.

[0030] Furthermore, such as Figures 1 to 3As shown, a circuit board 70 connects the main housing 21 and the first cover 23. The circuit board 70 has a first through hole 71. One end of the motor shaft 10 extends into the assembly cavity 24 through the first through hole 71 and connects to the first lens 11. The motor shaft 10, the first position sensor 50, and the light source 40 are electrically connected to the circuit board 70. The circuit board 70 is located at the connection between the main housing 21 and the first cover 23, utilizing the axial clearance originally used for sealing or connection, without occupying additional internal space in the assembly cavity 24. At the same time, the motor shaft 10 extends into the assembly cavity 24 through the first through hole 71 on the circuit board 70, realizing the movement of the moving parts within the stationary parts, improving the overall compactness of the structure. While realizing electrical functions, the circuit board 70 also serves as a reinforcing structure between the main housing 21 and the first cover 23, enhancing the overall rigidity of the housing 20.

[0031] Furthermore, such as Figures 4 to 5 As shown, the edge of the first cover 23 is provided with a first cavity 25, which provides a dedicated installation space for the first position sensor 50, enabling the positioning and protection of the first position sensor 50. The first position sensor 50 is connected to the first cavity 25 to ensure its fixation within the assembly cavity 24. The first cavity 25 is provided with a first sensing port 26 and a first connecting hole 27, which are respectively connected to the first cavity 25. The first sensing port 26 is connected to the assembly cavity 24, allowing a transmitted light beam to enter the first cavity 25 from the assembly cavity 24 and illuminate the first signal receiving surface 51 through the first sensing port 26. The position of the first sensing port 26 corresponds to the first signal receiving surface 51. The first sensing port 26 extends circumferentially along the assembly cavity 24 to increase the range of the light-gathering opening and adapt to the trajectory change of the transmitted light spot when the first lens 11 rotates. The first connecting hole 27 is set facing the circuit board 70 to facilitate docking with the circuit board 70 below. The first position sensor 50 is electrically connected to the circuit board 70 through the first connecting hole 27, so that the first position sensor 50 and the circuit board 70 can be connected at a relatively short distance.

[0032] Furthermore, such as Figures 4 to 5 As shown, the edge of the first cover 23 is provided with a second cavity, and the light source 40 is connected to the second cavity, providing a dedicated installation space for the light source 40 and enabling its positioning and protection. The second cavity has a light-emitting port 29 and a second connecting hole 30 that are respectively connected to the second cavity. The light-emitting port 29 is connected to the assembly cavity 24, and the position of the light-emitting port 29 corresponds to that of the light-emitting surface 41, allowing the light beam emitted from the light source 40 to enter the assembly cavity 24 and illuminate the first lens 11. The second connecting hole 30 is positioned facing the circuit board 70, and the light source 40 is electrically connected to the circuit board 70 through the second connecting hole 30, enabling the power supply and control signal access of the light source 40 with a short path and high reliability.

[0033] Furthermore, such as Figures 2 to 3As shown, one end of the motor shaft 10 that extends into the assembly cavity 24 is connected to a lens clamp 15. The lens clamp 15 is provided with a lens clamping groove 16, which provides a mounting space for limiting the first lens 11, for accommodating and fixing the first lens 11. The first lens 11 is connected to the lens clamping groove 16 to achieve positioning of the first lens 11. The motor shaft 10 drives the first lens 11 to rotate synchronously through the lens clamp 15.

[0034] Furthermore, such as Figures 1 to 3 As shown, the housing 20 also includes a second cover 34, which is connected to the end of the main housing 21 away from the first cover 23. The second cover 34, the main housing 21, and the first cover 23 together constitute a closed housing 20, improving overall rigidity and sealing. The second cover 34 is provided with a second through hole 35, through which one end of the motor shaft 10 extends out of the housing 20 and connects to the second lens 14, allowing the motor shaft 10 to pass through the housing 20 to achieve external functional connection and undertake the task of reflecting the main beam.

[0035] Furthermore, such as Figures 1 to 5 As shown, a second position sensor 60 is connected to the circuit board 70, and the second position sensor 60 is connected to the assembly cavity 24. The light source 40, the first position sensor 50, and the second position sensor 60 are arranged sequentially along the circumference of the housing 20. The first position sensor 50 independently acquires lens angle information through the displacement of the transmitted light spot, and the first position sensor 50 and the second position sensor 60 form a dual-channel angle feedback. When the second position sensor 60 causes data abnormalities due to contamination, failure, or signal interruption, the first position sensor 50 can serve as a backup signal source to maintain the basic operation of the system. At the same time, the assembly alignment of the second position sensor 60 and the motor shaft 10 can be performed based on the feedback from the first position sensor 50.

[0036] As one embodiment, such as Figures 2 to 3 As shown, the first lens 11 is a planar optical glass substrate with a thickness of 0.5–2.0 mm, such as quartz glass. A beam-splitting film is deposited on one of its surfaces. This film achieves 50% reflection and 50% transmission at specific wavelengths, such as 850 nm, 905 nm, and 1550 nm. Of course, it can also be set to 70% reflection and 30% transmission, 30% reflection and 70% transmission, etc., depending on the requirements. When a beam of light is incident on the surface of the film at a certain incident angle, such as 45°, part of it is reflected and the other part is transmitted through.

[0037] The assembly and adjustment methods are as follows: Step 1: Initial installation. Fix the second position sensor 60 in the preset position and initially install the first lens 11 on the motor shaft 10. There may be slight attitude deviations (tilt or eccentricity). Step 2: Turn on the light source and collect the transmitted light spot on the first position sensor 50. The light source 40 emits a parallel beam of light and illuminates the first lens 11. Part of the beam of light is transmitted and received by the first position sensor 50 to form a transmitted light spot. If the lens is not at the ideal zero point, the light spot will deviate from the center. The offset is recorded as d, where the unit of d is mm or pixels. Step 3: Establish the mapping relationship between offset d and lens angle θ; it has been calibrated before leaving the factory: θ=k*d (k is a proportionality coefficient, determined by optical parameters), the system calculates the actual lens deflection angle θ based on the current offset d; Step 4: Control the motor to fine-tune the shaft angle; send a fine-tuning command to the motor to drive the motor shaft 10 to rotate by a compensation angle –θ, and the first lens 11 will return to the center and approach the preset zero point position; Step 5: Simultaneously monitor the direction of the reflected beam. Another part of the beam is reflected by the first lens 11 and projected onto the photosensitive surface of the second position sensor 60. When the first lens 11 approaches the ideal zero point, the reflected beam gradually tends to be perpendicular to the photosensitive surface of the second sensor. At this point, the light spot is centered, the energy is concentrated, and the response linearity is optimal.

[0038] Step 6: Lock the assembly state. When the first position sensor 50 measures d≈0 (i.e., the light spot is located in the center), it is determined that the first lens 11 is at the ideal zero point. At this time, the reflected beam is also perpendicularly incident on the second position sensor 60. Fix the motor shaft 10 or the lens clamp 15 structure to complete the assembly.

[0039] During assembly, the offset d of the transmitted light beam spot is detected by the first position sensor 50, and a feedback signal is generated based on the offset. The control system adjusts the rotation angle of the motor shaft 10 according to the feedback signal until the light spot is located in the center area of ​​the first position sensor 50. At this time, the first lens 11 is at a preset zero point position, and the light beam reflected to the second position sensor 60 is perpendicularly incident on its photosensitive surface, thereby ensuring that the output of the second position sensor 60 has good linearity. The offset d is linearly related to the deflection angle of the first lens 11. This linear relationship is obtained through factory calibration and stored in the control system of the circuit board 70.

[0040] As one embodiment, the second position sensor 60 may be an encoder, a Hall sensor, a reflective PSD, etc.

[0041] In one embodiment, the first position sensor is a silicon photodiode.

[0042] In one embodiment, the first position sensor 50 and the second position sensor 60 are arranged perpendicularly to each other.

[0043] Furthermore, such as Figures 4 to 5As shown, the edge of the first cover 23 is provided with a third cavity 31, which provides a dedicated installation space for the second position sensor 60, enabling the positioning and protection of the second position sensor 60. The second position sensor 60 is connected to the third cavity 31 to ensure its stable posture. The third cavity 31 is provided with a second sensing port 32 and a third connecting hole 33, which are respectively connected to the third cavity 31. The second sensing port 32 is connected to the assembly cavity 24, allowing the reflected light beam to enter the third cavity 31 and illuminate the second signal receiving surface 61. The position of the second sensing port 32 corresponds to the second signal receiving surface 61. The second sensing port 32 extends circumferentially along the assembly cavity 24 to adapt to the trajectory change of the reflected light spot when the first lens 11 rotates. The third connecting hole 33 is set towards the circuit board 70, and the second position sensor 60 is electrically connected to the circuit board 70 through the third connecting hole 33. The setting of the third connecting hole 33 towards the circuit board 70 allows the pins or flexible wires of the second position sensor 60 to directly connect to the pads of the circuit board 70 through the third connecting hole 33, resulting in a short trace path.

[0044] In one embodiment, the third cavity 31 is configured to correspond in shape to the second position sensor 60.

[0045] In one embodiment, the distance between the first position sensor 50 and the second position sensor 60 and the axis of the motor shaft 10 is set to 4mm-8mm.

[0046] In summary, this utility model embodiment provides a galvanometer motor, including a housing 20, a motor, a motor shaft 10, a light source 40, a first lens 11, and a first position sensor 50. The motor is connected to the housing 20, and the motor's rotation output end is connected to the motor shaft 10; the first lens 11 and the second lens 14 are respectively fixed to both ends of the motor shaft 10, and the first lens 11 and the second lens 14 rotate synchronously with the motor shaft 10; the light source 40 and the first position sensor 50 are located at the same end of the housing 20, and the light source 40 and the first position sensor 50 are respectively arranged opposite to each other on both sides of the motor shaft 10; the first position sensor 50 is provided with a first signal receiving surface 51; the light source 40 is provided with a light emitting surface 41, the light emitting surface 41 is arranged facing the first signal receiving surface 51; the light source 40 is configured to emit a light beam, and the emitted light beam passes through the first lens 11 and is incident on the first signal receiving surface 51. The light source 40 is configured to emit a parallel light beam, which is emitted from the light-emitting surface 41. This beam illuminates the first lens 11 at a certain incident angle, and after refraction and transmission by the first lens 11, it exits. The exiting light is parallel to the incident light and produces a lateral displacement. This transmitted beam is incident on the first signal receiving surface 51 of the first position sensor 50. When the motor shaft 10 drives the first lens 11 to rotate, the incident angle changes, causing a corresponding change in the offset of the transmitted beam, thereby moving the position of the light spot on the photosensitive surface of the first position sensor 50. By pre-calibrating the correspondence between the light spot displacement and the lens deflection angle, an angle detection model is established in the control system to achieve real-time feedback of the position and speed of the motor shaft 10. This scheme uses a transmission optical path for angle detection. The light source 40 and the first position sensor 50 are both located on the same side of the housing 20, resulting in a simple optical path structure that is beneficial for system miniaturization and modular integration.

[0047] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this utility model, and these improvements and substitutions should also be considered within the protection scope of this utility model.

Claims

1. A galvanometer motor characterized by: The device comprises a motor shaft, a housing, a light source, and a first position sensor. The motor shaft is connected to the housing. A first lens and a second lens are respectively connected to both ends of the motor shaft. The light source, the first lens, and the first position sensor are located at the same end of the housing. The light source and the first position sensor are respectively arranged opposite to each other on both sides of the motor shaft. The first position sensor has a first signal receiving surface. The light source has a light emitting surface, which faces the first signal receiving surface. The light source is configured to emit a light beam, which passes through the first lens and then enters the first signal receiving surface.

2. The galvanometer motor according to claim 1, characterized by: The first lens has a first light-transmitting surface and a second light-transmitting surface that are arranged opposite to each other, and the first light-transmitting surface and the second light-transmitting surface are parallel to each other.

3. The galvanometer motor according to claim 1, characterized in that: The housing includes a main housing and a first cover. The first cover is connected to one end of the main housing and has an assembly cavity. The main housing has an axially extending through groove. One end of the through groove communicates with the assembly cavity. The motor shaft is rotatably connected to the through groove. One end of the motor shaft extends into the assembly cavity and is connected to the first lens. The first position sensor and the light source are respectively connected to the assembly cavity. The second lens is connected to the end of the main housing away from the first cover.

4. The galvanometer motor according to claim 3, characterized by: A circuit board is connected between the main housing and the first cover. The circuit board has a first through hole. One end of the motor shaft extends into the assembly cavity through the first through hole and is connected to the first lens. The motor shaft, the first position sensor, and the light source are electrically connected to the circuit board.

5. The galvanometer motor according to claim 4, characterized in that: The first cover has a first cavity on its edge. The first position sensor is connected to the first cavity. The first cavity has a first sensing port and a first connecting hole. The first sensing port and the first connecting hole are respectively connected to the first cavity. The first sensing port is connected to the assembly cavity. The position of the first sensing port is corresponding to the first signal receiving surface. The first sensing port extends circumferentially along the assembly cavity. The first connecting hole is facing the circuit board. The first position sensor is electrically connected to the circuit board through the first connecting hole.

6. The galvanometer motor according to claim 4, characterized by: The edge of the first cover is provided with a second cavity, the light source is connected to the second cavity, the second cavity is provided with a light outlet and a second connection hole respectively communicating with the second cavity, the light outlet is communicated with the assembly cavity, the position of the light outlet is corresponding to the position of the light-emitting surface, the second connection hole is arranged facing the circuit board, and the light source is electrically connected to the circuit board through the second connection hole.

7. The galvanometer motor according to claim 3, characterized in that: One end of the motor shaft that extends into the assembly cavity is connected to a lens clamp, which has a lens clamping groove, and the first lens is connected to the lens clamping groove.

8. The galvanometer motor according to claim 3, characterized by: The housing also includes a second cover, which is connected to the end of the main housing away from the first cover. The second cover has a second through hole, through which one end of the motor shaft extends out of the housing and is connected to the second lens.

9. The galvanometer motor according to claim 4, characterized in that: The circuit board is connected to a second position sensor, which is connected to the assembly cavity. The light source, the first position sensor, and the second position sensor are arranged sequentially along the circumference of the housing. The second position sensor is provided with a second signal receiving surface, which is positioned facing the first lens.

10. The galvanometer motor according to claim 9, characterized by: The edge of the first cover is provided with a third cavity, and the second position sensor is connected to the third cavity. The third cavity is provided with a second sensing port and a third connecting hole. The second sensing port and the third connecting hole are respectively connected to the third cavity. The second sensing port is connected to the assembly cavity. The position of the second sensing port is corresponding to the second signal receiving surface. The second sensing port extends circumferentially along the assembly cavity. The third connecting hole is set towards the circuit board. The second position sensor is electrically connected to the circuit board through the third connecting hole.

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