A laser displacement sensing device

Abstract

This utility model provides a laser displacement sensing device, relating to the field of machine vision technology. The laser displacement sensing device includes: a base plate, a laser emitting assembly, an optical lens assembly, an image sensing assembly, and a sensing assembly bracket; the laser emitting assembly, optical lens assembly, and sensing assembly bracket are all mounted on the base plate; the optical lens assembly forms an angle with the laser emitting assembly; the sensing assembly bracket is located at the rear end of the optical lens assembly; the image sensing assembly is mounted on the sensing assembly bracket via an adjustment component; the adjustment component is used to adjust the distance and tilt angle between the image sensing assembly and the sensing assembly bracket. During assembly, the laser displacement sensing device allows for manual adjustment of the adjustment component to change the distance and tilt angle between the image sensing assembly and the sensing assembly bracket. This enables high-precision, multi-dimensional, and accurate adjustment of the image sensing assembly, further improving the accuracy of the laser displacement sensing device.

Description

Technical Field

[0001] This utility model relates to the field of machine vision technology, and in particular to a laser displacement sensing device. Background Technology

[0002] Laser displacement sensing devices are high-precision measurement sensors that utilize laser technology based on the principle of triangulation.

[0003] Laser displacement sensors can accurately measure changes in the position and displacement of a target object without contact. They are used to measure geometric quantities such as displacement, thickness, vibration, distance, and diameter of an object. Laser displacement sensors are characterized by non-contact measurement, high accuracy, and fast response speed.

[0004] Laser displacement sensing devices in related technologies typically include a base plate, a laser, an optical lens, and an image sensor. The laser and optical lens are mounted on the base plate, while the image sensor is mounted at the rear of the optical lens. During measurement, the laser emits a laser beam towards the target object; after being reflected by the target object, the laser beam enters the optical lens, where the image sensor captures the image. The captured image is then processed to obtain the measurement result.

[0005] Currently, some laser displacement sensing devices have optical lenses that can be connected to the base plate via a sliding connection, allowing the position of the optical lens on the base plate to be adjusted, thereby improving the installation error of the optical lens.

[0006] Because laser displacement sensing devices require high measurement accuracy, the alignment and positioning of internal optical components also demand high precision. However, current laser displacement sensing devices only allow adjustment of the optical lens, not other components. Furthermore, installation errors in other components can occur during assembly, affecting the overall measurement accuracy. Utility Model Content

[0007] The purpose of this utility model embodiment is to provide a laser displacement sensing device to reduce the impact of installation errors of other components on the overall measurement accuracy. The specific technical solution is as follows:

[0008] This utility model provides a laser displacement sensing device, including: a base plate, a laser emitting assembly, an optical lens assembly, an image sensing assembly, and a sensing assembly support;

[0009] The laser emitting component, optical lens component, and sensor component bracket are all mounted on the base plate;

[0010] The optical lens assembly and the laser emitting assembly are at an angle, such that the laser beam emitted by the laser emitting assembly toward the target object can be reflected by the target object back to the optical lens assembly.

[0011] The sensor component bracket is located at the rear end of the optical lens assembly;

[0012] The image sensing component is mounted on the sensing component bracket via an adjustment component, enabling the image sensing component to receive the laser beam reflected by the target object and acquire the laser image.

[0013] The adjustment component is used to adjust the distance and tilt angle between the image sensing component and the sensing component support.

[0014] In some embodiments of this utility model, the image sensing component includes: an image sensor and a sensor circuit board; the image sensor is fixed on the side of the sensor circuit board facing the target object; the sensor circuit board is vertically mounted on the side of the sensing component bracket away from the target object via an adjustment component;

[0015] On the sensor component bracket, a sensor through hole is provided at a position corresponding to the image sensor; the laser beam reflected by the target object passes through the sensor through hole and enters the image sensor.

[0016] In some embodiments of this utility model, the adjustment assembly includes: a plurality of adjustment screws and a plurality of first elastic washers; the plurality of first elastic washers are located between the sensor circuit board and the sensing assembly bracket;

[0017] Each of the adjusting screws passes sequentially through the sensor circuit board and a first elastic washer, and is fixedly connected to the sensor component bracket; by adjusting the tightness of different adjusting screws, the distance and tilt angle between the sensor circuit board and the sensor component bracket can be adjusted.

[0018] The plurality of first elastic washers are distributed around the image sensor.

[0019] In some embodiments of this utility model, the sensor component bracket is an L-shaped bracket, including a horizontal fixing plate and a vertical connecting plate connected to each other; the horizontal fixing plate is fixedly connected to the base plate; the sensor circuit board is fixedly mounted on the vertical connecting plate; and the sensor through hole is provided on the vertical connecting plate.

[0020] On the vertical connecting plate, a washer mounting groove is provided at the position corresponding to each of the first elastic washers for installing the first elastic washers; on the vertical connecting plate, an adjusting screw hole is provided at the center position of each washer mounting groove for cooperating with the adjusting screw.

[0021] In some embodiments of this utility model, the image sensing component further includes: a heat sink;

[0022] A heat dissipation hole is provided on the sensor circuit board at a position corresponding to the image sensor; the area of ​​the heat dissipation hole is smaller than the area of ​​the image sensor; the area of ​​the image sensor not covering the heat dissipation hole is fixed to the sensor circuit board.

[0023] The heat sink passes through the heat dissipation hole and abuts against the image sensor.

[0024] In some embodiments of this utility model, the heat sink is Z-shaped; the top of the heat sink passes through the heat dissipation hole and abuts against the image sensor; the bottom of the heat sink is fixed to the base plate; the heat sink can transfer the heat of the image sensor to the base plate; and / or,

[0025] A thermally conductive gel is coated between the heat sink and the image sensor.

[0026] In some embodiments of this utility model, the laser emitting assembly includes: a laser and a laser driver board electrically connected to the laser; the laser driver board is mounted on the base plate;

[0027] The top of the base plate has a first mounting boss and a second mounting boss; the laser is mounted on the first mounting boss; and the sensing component bracket is mounted on the second mounting boss.

[0028] In some embodiments of this utility model, a fixing hole is provided at the bottom of the laser; a positioning post is provided on the base plate at a position corresponding to the fixing hole; the positioning post is embedded in the fixing hole to fix the laser.

[0029] In some embodiments of this utility model, the sensor circuit board is perpendicular to the length direction of the laser of the laser emitting assembly;

[0030] The laser displacement sensing device further includes: a reflector;

[0031] The reflector is mounted at the rear end of the optical lens assembly; the mirror surface of the reflector is positioned facing the laser, and is used to reflect the light received by the optical lens assembly onto the image sensor on the sensor circuit board.

[0032] In some embodiments of this utility model, the optical lens assembly includes: an optical lens; the optical lens is mounted on the base plate by an optical lens bracket fixed on the base plate; the optical axis of the optical lens has the included angle with the optical axis of the laser emission of the laser emission assembly;

[0033] The reflector is vertically mounted on the base plate via a reflector bracket fixed to the base plate;

[0034] The reflector bracket is located between the rear end of the optical lens assembly and the sensor assembly bracket; the side of the reflector bracket on which the reflector is mounted is positioned facing the laser, such that the mirror surface of the reflector faces the laser.

[0035] In some embodiments of this utility model, a light shield is further provided between the optical lens bracket and the sensing component bracket; the light shield is placed on the side of the reflector bracket on which the reflector is mounted, and is used to block ambient light that illuminates the laser light path.

[0036] In some embodiments of this utility model, it also includes: a circuit board assembly, insulated wires, and a complete housing;

[0037] The circuit board assembly is located on top of the laser emitting assembly, the optical lens assembly, and the image sensing assembly, and is electrically connected to the laser emitting assembly and the image sensing assembly.

[0038] The outer casing covers the laser emitting assembly, optical lens assembly, image sensing assembly, and circuit board assembly; the bottom of the outer casing is sealed to the base plate; a laser emission hole is provided on the outer casing at a position corresponding to the front end of the laser emitting assembly; a lens receiving hole is provided on the outer casing at a position corresponding to the front end of the optical lens assembly.

[0039] The insulated wire passes through the outer casing of the machine and is electrically connected to the circuit board assembly.

[0040] In some embodiments of this utility model, the circuit board assembly includes: a motherboard and an interface board; the interface board is electrically connected to the motherboard; the interface board is electrically connected to the laser emitting component, the image sensing component, and the insulated wire, respectively; the motherboard is electrically connected to the insulated wire.

[0041] A thermal pad is provided on the top of the motherboard for heat dissipation.

[0042] In some embodiments of this utility model, the side of the machine housing away from the target object is provided with a wire mounting hole and a wire mounting base protruding from the machine housing; the wire mounting base has a threaded structure.

[0043] The insulated wire passes through the wire mounting base and is installed in the wire mounting hole; a metal nut and a second elastic washer are fitted on the insulated wire; the end of the metal nut facing the wire mounting hole engages with the threaded structure inside the wire mounting base.

[0044] The second elastic washer, under the compression of the metal nut and the machine housing, can be interference-fitted with the insulated wire and the machine housing.

[0045] Beneficial effects:

[0046] This utility model provides a laser displacement sensing device, which includes a laser emitting assembly, an optical lens assembly, and a sensing assembly bracket on a base plate. An image sensing assembly is mounted on the sensing assembly bracket via an adjustment assembly. The adjustment assembly can adjust the distance and tilt angle between the image sensing assembly and the sensing assembly bracket.

[0047] In this way, during assembly, the distance and tilt angle between the image sensing component and its support can be changed by adjusting the adjustment components, ensuring that the image sensing component is aligned with the optical axis of the laser beam. This achieves precise adjustment of the image sensing component, reduces the impact of installation errors on the overall measurement accuracy, and improves the overall measurement accuracy of the laser displacement sensing device.

[0048] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0049] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0050] Figure 1a A schematic diagram of the laser displacement sensing device provided by this utility model without the main housing installed;

[0051] Figure 1b for Figure 1a A schematic diagram of the laser displacement sensing device from another perspective;

[0052] Figure 1c for Figure 1aExploded view of the laser displacement sensing device shown;

[0053] Figure 2a for Figure 1a A schematic diagram of the image sensing component in the laser displacement sensing device shown.

[0054] Figure 2b for Figure 2a A schematic diagram of the image sensing component from another perspective;

[0055] Figure 2c for Figure 2a The diagram shows the structure of the image sensing component mounted on the sensing component bracket.

[0056] Figure 2d for Figure 2c The image sensing component shown is mounted on the sensing component bracket from another perspective.

[0057] Figure 3 for Figure 1a A schematic diagram of the structure of the laser displacement sensing device shown, in which the adjustment component is installed on the sensor component bracket (the image sensing component is not shown);

[0058] Figure 4a for Figure 1a A schematic diagram of the sensor component support structure in the laser displacement sensing device shown.

[0059] Figure 4b for Figure 4a A schematic diagram of the sensor component bracket from another perspective;

[0060] Figure 5 for Figure 1a A partial cross-sectional view of the laser displacement sensing device shown.

[0061] Figure 6a for Figure 1a A bottom view of the laser in the laser displacement sensing device shown.

[0062] Figure 6b for Figure 1a A top view of the first mounting boss of the laser displacement sensing device shown.

[0063] Figure 7a A schematic diagram of the laser displacement sensing device provided by this utility model without a light shield;

[0064] Figure 7b for Figure 7a The diagram shows the top-view optical path of the laser displacement sensing device.

[0065] Figure 8a for Figure 7a A top view of the base plate of the laser displacement sensing device shown;

[0066] Figure 8b for Figure 7a A schematic diagram of the mounting structure of the reflector bracket and optical lens bracket of the laser displacement sensing device shown.

[0067] Figure 8c for Figure 8b A schematic diagram of the mounting structure of the mirror bracket and optical lens bracket shown from another perspective;

[0068] Figure 8d for Figure 7a The diagram shows the structure of the laser displacement sensing device, in which the reflector and optical lens are respectively mounted on the reflector bracket and the optical lens bracket.

[0069] Figure 9a A schematic diagram of the structure of the laser displacement sensing device provided by this utility model with the housing installed;

[0070] Figure 9b for Figure 9a A schematic diagram of the laser displacement sensing device from another perspective;

[0071] Figure 9c for Figure 9a Exploded view of the laser displacement sensing device shown;

[0072] Figure 9d for Figure 9b Exploded view of the laser displacement sensing device shown;

[0073] Figure 10a for Figure 9a The circuit connection diagram of the laser displacement sensing device is shown below.

[0074] Figure 10b for Figure 9a An enlarged view of the motherboard and the motherboard thermal pad of the laser displacement sensing device shown.

[0075] Figure 11a for Figure 9b A partial exploded view of the laser displacement sensing device shown.

[0076] Figure 11b for Figure 9a The rear view of the laser displacement sensing device shown is without insulated wires installed on the overall casing.

[0077] Figure 11c for Figure 9b A cross-sectional view shown in the AA direction.

[0078] Figure label:

[0079] Base plate 1, first mounting boss 11, positioning post 111, second mounting boss 12, reflector bracket 13, light shield 131, horizontal light shield 1311, vertical light shield 1312, reflector fixing plate 132, optical lens bracket 14.

[0080] Laser emitting assembly 2, laser 21, laser driver board 22, fixing hole 23;

[0081] Optical lens assembly 3, optical lens 31, reflector 30;

[0082] Image sensing assembly 4, image sensor 41, sensor fixing part 411, sensor photosensitive part 412, sensor circuit board 42, heat dissipation through hole 421, first electrical connector 422, second electrical connector 423, heat sink 43, top of heat sink 431, bottom of heat sink 432.

[0083] The sensor component bracket 5, sensor through hole 51, horizontal fixing plate 52, vertical connecting plate 53, washer mounting groove 531, and adjusting screw hole 532 are included.

[0084] Adjusting component 6, adjusting screw 61, first elastic washer 62;

[0085] Circuit board assembly 7, interface board 72, motherboard 71, motherboard thermal pad 711;

[0086] 8 insulated wire, 81 metal nut, 82 second elastic washer, 821 nut washer, 822 metal washer;

[0087] The machine casing 9, laser emission port 91, laser filter 911, lens light receiving port 92, lens filter 921, wire mounting hole 93, wire mounting base 94, light guide column 95, and sealing ring 96. Detailed Implementation

[0088] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art based on the present utility model are within the protection scope of the present utility model.

[0089] This utility model provides a laser displacement sensing device, such as Figures 1a to 1c As shown, Figure 1a This is a schematic diagram of the laser displacement sensing device provided by this utility model without the main housing installed. Figure 1b for Figure 1a The diagram shows a structural schematic of the laser displacement sensing device from another perspective. Figure 1c for Figure 1a The exploded view of the laser displacement sensing device shown is shown. The laser displacement sensing device includes: a base plate 1, a laser emitting assembly 2, an optical lens assembly 3, an image sensing assembly 4, and a sensing assembly bracket 5; the laser emitting assembly 2, the optical lens assembly 3, and the sensing assembly bracket 5 are all mounted on the base plate 1; the optical lens assembly 3 forms an angle with the laser emitting assembly 2, allowing the laser beam emitted by the laser emitting assembly 2 towards the target object to be reflected by the target object back to the optical lens assembly 3; the sensing assembly bracket 5 is located at the rear end of the optical lens assembly 3; the image sensing assembly 4 is mounted on the sensing assembly bracket 5 via an adjustment component 6, enabling the image sensing assembly 4 to receive the laser beam reflected by the target object and acquire a laser image; the adjustment component 6 is used to adjust the distance and tilt angle between the image sensing assembly 4 and the sensing assembly bracket 5.

[0090] In this embodiment, a laser emitting assembly 2, an optical lens assembly 3, and a sensor assembly bracket 5 are provided on the base plate 1. The image sensing assembly 4 is mounted on the sensor assembly bracket 5 via an adjustment assembly 6, ensuring the reliability of the entire laser displacement sensing device after assembly. The adjustment assembly 6 can adjust the distance and tilt angle between the image sensing assembly 4 and the sensor assembly bracket 5.

[0091] In this way, during the assembly process, the distance and tilt angle between the image sensing component 4 and the sensing component support 5 can be changed by manually adjusting the adjustment component 6, so that the image sensing component 4 is aligned with the optical axis of the laser beam. This achieves precise adjustment of the image sensing component 4, reduces the impact of the installation error of the image sensing component 4 on the overall measurement accuracy of the device, and improves the overall measurement accuracy of the laser displacement sensing device.

[0092] In some embodiments of this utility model, such as Figures 2a to 2d As shown, Figure 2a for Figure 1a The diagram shows the structure of the image sensing component in the laser displacement sensing device. Figure 2b for Figure 2a The image sensing component shown is illustrated from another perspective. Figure 2c for Figure 2a The diagram shown illustrates the structure of the image sensing component mounted on the sensing component bracket. Figure 2d for Figure 2cThe image sensing assembly shown is a schematic diagram from another perspective of its installation on the sensor assembly bracket. The image sensing assembly 4 includes: an image sensor 41 and a sensor circuit board 42; the image sensor 41 is fixed to the side of the sensor circuit board 42 facing the target object; the sensor circuit board 42 is vertically mounted on the side of the sensor assembly bracket 5 away from the target object via an adjustment component 6; a sensor through-hole 51 is provided on the sensor assembly bracket 5 at a position corresponding to the image sensor 41; a laser beam reflected by the target object passes through the sensor through-hole 51 and enters the image sensor 41.

[0093] In this embodiment, the sensor circuit board 42 is vertically mounted on the side of the sensing component bracket 5 away from the target object via the adjustment component 6. The side of the sensor circuit board 42 away from the sensing component bracket 5 has a first electrical connector 422 and a second electrical connector 423 for signal transmission. Because the adjustment component 6 connects the sensor circuit board 42 of the image sensing component 4 to the sensing component bracket 5, the distance and tilt angle between the sensor circuit board 42 and the sensing component bracket 5 can be changed manually during assembly. This, in turn, adjusts the distance and tilt angle between the image sensor 41 and the laser beam. This achieves high-precision, multi-dimensional, and accurate adjustment of the image sensor 41, further improving the accuracy of the laser displacement sensing device.

[0094] Meanwhile, the sensor through-hole 51 on the sensor component bracket 5 allows the laser beam to pass through the sensor component bracket 5 and be directly incident on the image sensor 41 located on the side of the sensor component bracket 5 away from the target object, thereby realizing image acquisition.

[0095] In some embodiments of this utility model, such as Figure 3 As shown, Figure 3 for Figure 1a The diagram shows a schematic of the adjustment component mounted on the sensor component bracket in the laser displacement sensing device (the image sensing component is not shown). The adjustment component 6 includes: multiple adjustment screws 61 and multiple first elastic washers 62; the multiple first elastic washers 62 are located between the sensor circuit board 42 and the sensor component bracket 5; each adjustment screw 61 passes through the sensor circuit board 42 and one first elastic washer 62 in sequence, and is fixedly connected to the sensor component bracket 5; by adjusting the tightness of different adjustment screws 61, the distance and tilt angle between the sensor circuit board 42 and the sensor component bracket 5 can be adjusted; the multiple first elastic washers 62 are distributed around the image sensor 41.

[0096] In this embodiment, a plurality of first elastic washers 62 are arranged around the image sensor 41 between the sensor circuit board 42 and the sensor component support 5. By adjusting the tightness of the adjusting screw 61, the sensor circuit board 42 and the sensor component support 5 compress the first elastic washers 62, causing the first elastic washers 62 to elastically deform, thereby adjusting the distance and tilt angle between the sensor circuit board 42 and the sensor component support 5, and further adjusting the distance and tilt angle between the image sensor 41 and the laser beam.

[0097] Specifically, there can be three first elastic washers 62, arranged in a triangle around the image sensor 41. When the adjusting screw 61 passing through any of the first elastic washers 62 is tightened, the first elastic washer 62 is compressed, reducing its thickness. This causes the sensor circuit board 42 to tilt towards that position, thereby adjusting the tilt angle of the sensor circuit board 42 relative to the sensor component support 5. When all the adjusting screws 61 are tightened to a consistent tightness, the sensor circuit board 42 can move the image sensor 41 located on it towards or away from the sensor component support 5. This adjusts the distance between the sensor circuit board 42 and the sensor component support 5.

[0098] In actual production, the number of adjusting screws 61 and first elastic washers 62 can be adjusted according to actual needs, as long as the distance and tilt angle between the sensor circuit board 42 and the sensor component bracket 5 can be adjusted.

[0099] In some embodiments of this utility model, such as Figure 4a and Figure 4b As shown, Figure 4a for Figure 1a The diagram shows the structural design of the sensor component support in the laser displacement sensing device. Figure 4b for Figure 4a The diagram shows a structural schematic of the sensor component bracket from another perspective. The sensor component bracket 5 is an L-shaped bracket, including a horizontal fixing plate 52 and a vertical connecting plate 53 connected to each other; the horizontal fixing plate 52 is fixedly connected to the base plate 1; the sensor circuit board 42 is fixedly mounted on the vertical connecting plate 53; a sensor through hole 51 is provided on the vertical connecting plate 53; on the vertical connecting plate 53, at the position corresponding to each first elastic washer 62, a washer mounting groove 531 is provided for mounting the first elastic washer 62; on the vertical connecting plate 53, at the center position of each washer mounting groove 531, an adjusting screw hole 532 is provided for cooperating with the adjusting screw 61.

[0100] In this embodiment, the sensor component bracket 5 is fixedly connected to the base plate 1 via a horizontal fixing plate 52, and a washer mounting groove 531 for mounting the first elastic washer 62 is provided on the vertical connecting plate 53. This allows for positioning of the first elastic washer 62 during installation. An adjusting screw 61 can be inserted into the adjusting screw hole 532 at the center of the washer mounting groove 531 to fix the first elastic washer 62 to the vertical connecting plate 53.

[0101] In some embodiments of this utility model, such as Figure 1a , Figure 2a and Figure 5 As shown, Figure 5 for Figure 1a A partial cross-sectional view of the laser displacement sensing device shown. The image sensing assembly 4 further includes: a heat sink 43; a heat dissipation through-hole 421 on the sensor circuit board 42 at a position corresponding to the image sensor 41; the area of ​​the heat dissipation through-hole 421 is smaller than the area of ​​the image sensor 41; the area of ​​the image sensor 41 not covered by the heat dissipation through-hole 421 is fixed to the sensor circuit board 42; the heat sink 43 passes through the heat dissipation through-hole 421 and abuts against the image sensor 41. The heat sink 43 is Z-shaped; the top of the heat sink 43 passes through the heat dissipation through-hole 421 and abuts against the image sensor 41; the bottom of the heat sink 43 is fixed to the base plate 1; the heat sink 43 can transfer heat from the image sensor 41 to the base plate 1; and / or, a thermally conductive gel is coated between the heat sink 43 and the image sensor 41.

[0102] In this embodiment, the sensor fixing part 411 of the image sensor 41 is fixedly connected to the sensor circuit board 42, and the photosensitive part 412 of the image sensor 41 is covered by the heat dissipation through hole 421. The heat sink 43 passes through the heat dissipation through hole 421 on the sensor circuit board 42 and abuts against the photosensitive part 412 of the image sensor 41. The heat sink 43 can be a Z-shaped heat sink, with the top 431 of the heat sink abutting against the image sensor 41 and the bottom 432 of the heat sink fixedly connected to the base plate 1. This direct contact heat dissipation method can effectively improve heat dissipation efficiency. Thermal conductive gel can also be coated between the heat sink 43 and the image sensor 41 to further enhance heat dissipation efficiency.

[0103] In some embodiments of this utility model, such as Figure 6a , Figure 6b and Figure 8a As shown, Figure 6a for Figure 1a The laser in the laser displacement sensing device shown is viewed from below. Figure 6b for Figure 1a The top view of the first mounting boss of the laser displacement sensing device shown. Figure 8a for Figure 7aThe diagram shows a top view of the base plate of the laser displacement sensing device. The laser emitting assembly 2 includes: a laser 21 and a laser driver plate 22 electrically connected to the laser 21; the laser driver plate 22 is mounted on the base plate 1; the top of the base plate 1 has a first mounting boss 11 and a second mounting boss 12; the laser 21 is mounted on the first mounting boss 11; and the sensing assembly bracket 5 is mounted on the second mounting boss 12. Figure 6a and Figure 6b As shown, a fixing hole 23 is provided at the bottom of the laser 21; a positioning post 111 is provided on the base plate 1 at the position corresponding to the fixing hole 23; the positioning post 111 is embedded in the fixing hole 23 to fix the laser 21.

[0104] In this embodiment, a fixing hole 23 is provided at the bottom of the laser 21, and a positioning post 111 is provided on the base plate 1 at a position corresponding to the fixing hole 23. Through the cooperation of the fixing hole 23 and the positioning post 111, the laser 21 can be positioned during installation, thereby achieving a hole-fitted connection between the laser 21 and the first mounting boss 11. In other embodiments, the positioning post 111 can also be provided on the first mounting boss 11.

[0105] In some embodiments of this utility model, such as Figure 7a and Figure 7b As shown, Figure 7a This is a schematic diagram of the laser displacement sensing device provided by this utility model without a light shield. Figure 7b for Figure 7a The diagram shows a top view of the optical path of the laser displacement sensing device. The sensor circuit board 42 is perpendicular to the length direction of the laser 21 in the laser emitting assembly 2. The laser displacement sensing device also includes a reflector 30; the reflector 30 is mounted at the rear end of the optical lens assembly 3; the mirror surface of the reflector 30 faces the laser 21 and is used to reflect the light received by the optical lens assembly 3 onto the image sensor 41 on the sensor circuit board 42. Figures 8a to 8d As shown, Figure 8b for Figure 7a The diagram shows the installation structure of the reflector bracket and optical lens bracket of the laser displacement sensing device. Figure 8c for Figure 8b This is a schematic diagram of the mounting structure of the mirror bracket and optical lens bracket from another perspective. Figure 8d for Figure 7aThe diagram shows the structure of the laser displacement sensing device, with the reflector and optical lens mounted on the reflector bracket and optical lens bracket, respectively. The optical lens assembly 3 includes: an optical lens 31; the optical lens 31 is mounted on the base plate 1 via an optical lens bracket 14 fixed to the base plate 1; the optical axis of the optical lens 31 forms an angle with the optical axis of the laser emission assembly 2; the reflector 30 is vertically mounted on the base plate 1 via a reflector bracket 13 fixed to the base plate 1; wherein the reflector bracket 13 is located between the rear end of the optical lens assembly 3 and the sensing assembly bracket 5; the side of the reflector bracket 13 on which the reflector 30 is mounted faces the laser 21, such that the mirror surface of the reflector 30 faces the laser 21.

[0106] In this embodiment, as Figure 7b As shown, a reflector 30 is disposed between the optical lens assembly 3 and the image sensing assembly 4, allowing the laser beam emitted from the rear end of the optical lens assembly 3 to be reflected by the reflector 30 to the image sensing assembly 4. The reflection by the reflector 30 achieves optical path deflection, enabling the image sensing assembly 4 to be placed in the cavity between the laser 21 and the optical lens assembly 3, thereby reducing the overall design size. Furthermore, by adjusting the position of the reflector 30, the direction and length of the optical path can be changed, allowing the image sensing assembly 4 to be adjusted to other positions.

[0107] like Figure 8d As shown, when the reflector 30 is installed on the reflector bracket 13, a reflector fixing plate 132 can be installed on the reflector bracket 13 to fix the reflector 30 to the reflector bracket 13, thereby preventing the reflector 30 from falling off the reflector bracket 13.

[0108] The reflector 30 is mounted on the reflector bracket 13, and the optical lens 31 is mounted on the optical lens bracket 14, ensuring the reliability of the laser displacement sensing device after assembly.

[0109] In some embodiments of this utility model, such as Figures 1a to 1c As shown, a light shield 131 is also provided between the optical lens bracket 14 and the sensor component bracket 5; the light shield 131 is placed on the side of the reflector bracket 13 where the reflector 30 is installed, and is used to block the ambient light that shines on the laser light path.

[0110] In this embodiment, a light shield 131 is disposed above the rear end of the reflector 30 and the optical lens 31. The light shield 131 includes a horizontal light shield 1311 and a vertical light shield 1312. The horizontal light shield 1311 is fixedly connected to the top of the reflector bracket 13. The bottom of the vertical light shield 1312 is fixedly connected to the base plate 1. The end of the vertical light shield 1312 near the sensor component bracket 5 is fixedly connected to the sensor component bracket 5. The end of the vertical light shield 1312 away from the sensor component bracket 5 extends towards the optical lens 31. This effectively reduces the influence of internal indicator lights and external ambient light on the laser optical path, thereby improving the accuracy of the laser sensing device.

[0111] In some embodiments of this utility model, such as Figures 9a to 9d As shown, Figure 9a A schematic diagram showing the structure of the laser displacement sensing device provided by this utility model with the main housing installed. Figure 9b for Figure 9a The diagram shows a structural schematic of the laser displacement sensing device from another perspective. Figure 9c for Figure 9a The exploded view of the laser displacement sensing device shown is shown. Figure 9d for Figure 9b The exploded view of the laser displacement sensing device shown is shown. The laser sensing device also includes: a circuit board assembly 7, an insulated wire 8 (power supply SR line), and a housing 9; the circuit board assembly 7 is located on top of the laser emitting assembly 2, the optical lens assembly 3, and the image sensing assembly 4, and is electrically connected to the laser emitting assembly 2 and the image sensing assembly 4; the housing 9 covers the laser emitting assembly 2, the optical lens assembly 3, the image sensing assembly 4, and the circuit board assembly 7; the bottom of the housing 9 is sealed to the base plate 1; a laser emission port 91 is provided on the housing 9 at a position corresponding to the front end of the laser emitting assembly 2; a lens receiving port 92 is provided on the housing 9 at a position corresponding to the front end of the optical lens assembly 3; the insulated wire 8 passes through the housing 9 and is electrically connected to the circuit board assembly 7.

[0112] In this embodiment, as Figure 9a As shown, a triangular recess is provided on the outer casing 9. A lens receiving hole 92 is provided on one side of the triangular recess, corresponding to the front end of the optical lens assembly 3. A laser filter 911 is provided at the laser emission hole 91. A lens filter 921 is provided at the lens receiving hole 92. A light guide post 95 is provided on the side of the outer casing 9 away from the target object to reduce the influence of ambient light on the laser displacement sensing device. A housing sealing ring 96 is provided between the outer casing 9 and the base plate 1 to reduce the influence of ambient light on the laser displacement sensing device.

[0113] In some embodiments of this utility model, such as Figure 10aand Figure 10b As shown, Figure 10a for Figure 9a The circuit connection diagram of the laser displacement sensing device is shown. Figure 10b for Figure 9a An enlarged view of the main board and main board thermal pad of the laser displacement sensing device shown. The circuit board assembly 7 includes: a main board 71 and an interface board 72; the interface board 72 is electrically connected to the main board 71; the interface board 72 is electrically connected to the laser emitting assembly 2, the image sensing assembly 4 and the insulated wire 8 respectively; the main board 71 is electrically connected to the insulated wire 8; a main board thermal pad 711 is provided on the top of the main board 71 for heat dissipation of the main board 71.

[0114] In this embodiment, the laser driver board 22 of the laser emitting assembly 2 and the image sensing circuit board 42 of the image sensing assembly 4 can be electrically connected to the interface board 72 via electronic wires. The motherboard 71 and the interface board 72 are connected via a board-to-board connector. The motherboard 71 is equipped with a SOC module (system-level module), a DDR module (double data rate synchronous dynamic random access memory), a PHY module (physical layer processing module), and a CVOUT module (image output module). Since the above four modules have high power consumption and generate a lot of heat, heat dissipation is required. Therefore, a motherboard thermal pad 711 is provided on the top of the motherboard 71, mainly for heat dissipation of the four modules of the motherboard 71.

[0115] In existing technologies, the insulated wire 8 is fixed to the outer casing 9 using adhesive through internal dispensing. However, this fixing method results in poor maintainability between the insulated wire 8 and the outer casing 9, making disassembly impossible. If a problem occurs, the device must be scrapped, significantly increasing maintenance costs. Furthermore, the adhesive is highly susceptible to environmental influences, potentially expanding and contracting at different temperatures. This can cause displacement of components within the laser sensor, affecting measurement accuracy.

[0116] In some embodiments of this utility model, such as Figures 11a to 11c As shown, Figure 11a for Figure 9b A partial exploded view of the laser displacement sensing device shown. Figure 11b for Figure 9a The image shows a rear view of the laser displacement sensing device without insulated wires installed on the overall casing. Figure 11c for Figure 9bA cross-sectional view shown in the AA direction. On the side of the outer casing 9 furthest from the target object, there is a wire mounting hole 93 and a wire mounting base 94 protruding from the outer casing 9. The wire mounting base 94 has a threaded structure. An insulated wire 8 passes through the wire mounting base 94 and is inserted into the wire mounting hole 93. A metal nut 81 and a second elastic washer 82 are fitted onto the insulated wire 8. The end of the metal nut 81 facing the wire mounting hole 93 engages with the threaded structure within the wire mounting base 94. The second elastic washer 82, under the pressure of the metal nut 81 and the outer casing 9, can achieve an interference fit with the insulated wire 8 and the outer casing 9.

[0117] In this embodiment, the inner diameter of the wire mounting base 94 is larger than the diameter of the wire mounting hole 93, so that the side wall of the second elastic washer 82 can fit against the housing 9 of the whole machine. Under the compression of the metal nut 81 and the housing 9 of the whole machine, elastic deformation occurs, thereby fixing the insulated wire 8 to the housing 9 of the whole machine.

[0118] Specifically, the outer diameter of the second elastic washer 82 is smaller than the inner diameter of the wire mounting base 94 but larger than the diameter of the wire mounting hole 93, so that the second elastic washer 82 can be embedded in the wire mounting hole 93 and abut against the housing 9. Simultaneously, the inner diameter of the second elastic washer 82 is larger than the outer diameter of the insulated wire 8, allowing it to slide axially along the insulated wire 8. Under the pressure of the metal nut 81 and the housing 9, the inner diameter of the second elastic washer 82 decreases while the outer diameter increases, causing the inner diameter of the second elastic washer 82 to tightly grip the insulated wire 8, and the outer diameter to closely fit the wire mounting base 94, thereby securing the insulated wire 8. Furthermore, a nut washer 821 is provided between the second elastic washer 82 and the metal nut 81. A metal washer 822 is provided between the second elastic washer 82 and the housing 9.

[0119] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. A laser displacement sensing device, characterized by, include: The base plate (1), laser emitting assembly (2), optical lens assembly (3), image sensing assembly (4), and sensing assembly bracket (5); The laser emitting assembly (2), the optical lens assembly (3), and the sensor assembly bracket (5) are all mounted on the base plate (1); The optical lens assembly (3) has an angle with the laser emitting assembly (2), so that the laser beam emitted by the laser emitting assembly (2) toward the target object can be reflected by the target object to the optical lens assembly (3). The sensor component bracket (5) is located at the rear end of the optical lens assembly (3); The image sensing component (4) is mounted on the sensing component bracket (5) through the adjustment component (6), so that the image sensing component (4) can receive the laser beam reflected by the target object and acquire the laser image; The adjustment component (6) is used to adjust the distance and tilt angle between the image sensing component (4) and the sensing component support (5).

2. The laser displacement sensing device according to claim 1, characterized in that, The image sensing component (4) includes: an image sensor (41) and a sensor circuit board (42); the image sensor (41) is fixed on the side of the sensor circuit board (42) facing the target object; the sensor circuit board (42) is vertically mounted on the side of the sensing component bracket (5) away from the target object by means of the adjustment component (6); On the sensor component bracket (5), a sensor through hole (51) is provided at a position corresponding to the image sensor (41); the laser beam reflected by the target object passes through the sensor through hole (51) and enters the image sensor (41).

3. The laser displacement sensing device according to claim 2, characterized in that, The adjustment assembly (6) includes: a plurality of adjustment screws (61) and a plurality of first elastic washers (62); the plurality of first elastic washers (62) are located between the sensor circuit board (42) and the sensor assembly bracket (5); Each of the adjusting screws (61) passes through the sensor circuit board (42) and a first elastic washer (62) in sequence and is fixedly connected to the sensor component bracket (5); by adjusting the tightness of different adjusting screws (61), the distance and tilt angle between the sensor circuit board (42) and the sensor component bracket (5) can be adjusted. The plurality of first elastic washers (62) are distributed around the image sensor (41).

4. The laser displacement sensing device according to claim 3, characterized in that, The sensor component bracket (5) is an L-shaped bracket, including a horizontal fixing plate (52) and a vertical connecting plate (53) connected to each other; the horizontal fixing plate (52) is fixedly connected to the base plate (1); the sensor circuit board (42) is fixedly installed on the vertical connecting plate (53); the sensor through hole (51) is provided on the vertical connecting plate (53); On the vertical connecting plate (53), at the position corresponding to each of the first elastic washers (62), there is a washer mounting groove (531) for mounting the first elastic washer (62); on the vertical connecting plate (53), at the center position of each washer mounting groove (531), there is an adjusting screw hole (532) for cooperating with the adjusting screw (61).

5. The laser displacement sensing device according to claim 2, characterized in that, The image sensing component (4) further includes: a heat sink (43); A heat dissipation through hole (421) is provided on the sensor circuit board (42) at a position corresponding to the image sensor (41); the area of ​​the heat dissipation through hole (421) is smaller than the area of ​​the image sensor (41); the area of ​​the image sensor (41) not covered by the heat dissipation through hole (421) is fixed to the sensor circuit board (42). The heat sink (43) passes through the heat dissipation hole (421) and abuts against the image sensor (41).

6. The laser displacement sensing device according to claim 5, characterized in that, The heat sink (43) is Z-shaped; the top of the heat sink (43) passes through the heat dissipation hole (421) and abuts against the image sensor (41); the bottom of the heat sink (43) is fixed to the base plate (1); the heat sink (43) can transfer the heat of the image sensor (41) to the base plate (1); and / or, A thermally conductive gel is coated between the heat sink (43) and the image sensor (41).

7. The laser displacement sensing device according to claim 2, characterized in that, The laser emitting assembly (2) includes: a laser (21) and a laser driver board (22) electrically connected to the laser (21); the laser driver board (22) is mounted on the base plate (1); The top of the base plate (1) has a first mounting boss (11) and a second mounting boss (12); the laser (21) is mounted on the first mounting boss (11); and the sensing component bracket (5) is mounted on the second mounting boss (12).

8. The laser displacement sensing device according to claim 7, characterized in that, The bottom of the laser (21) is provided with a fixing hole (23); on the base plate (1), at the position corresponding to the fixing hole (23), a positioning post (111) is provided; the positioning post (111) is embedded in the fixing hole (23) to fix the laser (21).

9. The laser displacement sensing device according to claim 7, characterized in that, The sensor circuit board (42) is perpendicular to the length direction of the laser (21) of the laser emitting assembly (2); The laser displacement sensing device further includes: a reflector (30); The reflector (30) is mounted at the rear end of the optical lens assembly (3); the mirror surface of the reflector (30) is set facing the laser (21) to reflect the light received by the optical lens assembly (3) onto the image sensor (41) on the sensor circuit board (42).

10. The laser displacement sensing device according to claim 9, characterized in that, The optical lens assembly (3) includes: an optical lens (31); the optical lens (31) is mounted on the base plate (1) by an optical lens bracket (14) fixed on the base plate (1); the optical axis of the optical lens (31) has the angle with the optical axis of the laser emission of the laser emission assembly (2); The reflector (30) is vertically mounted on the base plate (1) by a reflector bracket (13) fixed on the base plate (1); The reflector bracket (13) is located between the rear end of the optical lens assembly (3) and the sensing component bracket (5); the reflector bracket (13) is installed on one side of the reflector (30) and is positioned towards the laser (21), such that the mirror surface of the reflector (30) is positioned towards the laser (21).

11. The laser displacement sensing device according to claim 10, characterized in that, A light shield (131) is also provided between the optical lens bracket (14) and the sensing component bracket (5); the light shield (131) is placed on the side of the reflector bracket (13) where the reflector (30) is installed, and is used to block the ambient light that shines on the laser light path.

12. The laser displacement sensor device of claim 1, wherein, Also includes: Circuit board assembly (7), insulated wires (8), and complete housing (9); The circuit board assembly (7) is located on top of the laser emitting assembly (2), the optical lens assembly (3) and the image sensing assembly (4), and is electrically connected to the laser emitting assembly (2) and the image sensing assembly (4); The outer casing (9) covers the laser emitting assembly (2), the optical lens assembly (3), the image sensing assembly (4), and the circuit board assembly (7); the bottom of the outer casing (9) is sealed to the base plate (1); a laser emission hole (91) is provided on the outer casing (9) at a position corresponding to the front end of the laser emitting assembly (2); a lens light receiving hole (92) is provided on the outer casing (9) at a position corresponding to the front end of the optical lens assembly (3); The insulated wire (8) is threaded through the outer casing (9) and electrically connected to the circuit board assembly (7).

13. The laser displacement sensing device according to claim 12, characterized in that, The circuit board assembly (7) includes: a main board (71) and an interface board (72); the interface board (72) is electrically connected to the main board (71); the interface board (72) is electrically connected to the laser emitting assembly (2), the image sensing assembly (4) and the insulated wire (8) respectively; the main board (71) is electrically connected to the insulated wire (8); A motherboard thermal pad (711) is provided on the top of the motherboard (71) for heat dissipation.

14. The laser displacement sensing device according to claim 12, characterized in that, The outer casing (9) of the machine is provided with a wire mounting hole (93) and a wire mounting seat (94) protruding from the outer casing (9) on the side away from the target object; the wire mounting seat (94) has a threaded structure. The insulated wire (8) passes through the wire mounting base (94) and is installed in the wire mounting hole (93); a metal nut (81) and a second elastic washer (82) are fitted on the insulated wire (8); the end of the metal nut (81) facing the wire mounting hole (93) is engaged with the threaded structure inside the wire mounting base (94); The second elastic washer (82) can be pressurized by the metal nut (81) and the housing (9) to fit the insulated wire (8) and the housing (9).

Images