Assembly platform

Abstract

The utility model relates to an assembling platform which is used for an all-round TOF module and comprises an annular target plate, a support, a clamping jaw assembly and a camera, the support is provided with a mounting position used for supporting the all-round TOF module, the mounting position is located on the central axis of the annular target plate, the clamping jaw assembly is used for clamping the transmitting end or the receiving end of the all-round TOF module, and the camera is arranged above the mounting position along the central axis. Before formal calibration, Vcsel-AA and lens AA can be carried out on the surround-view TOF module on the platform, the assembly precision of the surround-view TOF module is improved, the annular target plate can cover all view angles of the 360-degree surround-view TOF module, the problem that the distance between a reflecting surface and a transmitting end is different when the transmitting end transmits towards different angles does not need to be considered, and the assembly precision of the surround-view TOF module is improved. And accurate calibration of the surround-view TOF module is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to TOF module production technical field, especially the assembly platform. BACKGROUND

[0002] The current market appears 360 degree look around TOF (Time-of-Flight) module such as laser radar, solid laser radar product etc., and the pattern projection surface of traditional TOF equipment is a plane when calibrating or AA (Active Alignment) testing, cannot test 360 degree ring completely, for look around TOF equipment, the traditional scheme calibration plane can only calibrate part of field of view angle, and the distance of different field of view angle to module is also different, in addition, the function of traditional TOF calibration equipment is relatively single: for example, calibration equipment can only implement calibration operation, AA equipment can only implement AA operation, leading to TOF equipment production cycle is longer, and time cost is higher. UTILITY MODEL CONTENT

[0003] If the existing 360 degree look around TOF module adopts traditional plane pattern projection surface to calibrate in assembly testing, there is the problem of different distance of different field of view angle to module, leading to unable to obtain the complete data of 360 degree ring, and the equipment for calibration or AA is relatively independent, and the function is single, and it is necessary to provide assembly platform.

[0004] The assembly platform is used for look around TOF module, comprising:

[0005] Ring-shaped calibration plate;

[0006] Support, the support has the installation site for supporting the look around TOF module in the central axis of the ring-shaped calibration plate;

[0007] Clamping jaw assembly, the clamping jaw assembly is located in one side of the support and is used for clamping the transmitting end or receiving end of the look around TOF module;And

[0008] Camera, the camera is located above the installation site along the central axis.

[0009] So setting, before formal calibration, the look around TOF module can also be carried out transmitting end AA and transmitting & receiving AA on the platform, improve the assembly precision of the look around TOF module, and the ring-shaped calibration plate can cover the whole angle of view of 360 degree look around TOF module, need not consider the problem of different distance between reflecting surface and transmitting end when transmitting end is transmitted towards different angle, realizes accurate calibration to look around TOF module.

[0010] In one embodiment, the bracket includes a support column arranged away from the central axis and a first support beam extending from the top of the support column toward the central axis. The mounting position is located on the first support beam and is provided with a sunken groove for clamping the circuit board of the surround-view TOF module.

[0011] With this arrangement, when the clamping claw assembly adjusts the transmitting mirror seat of the transmitting end, the circuit board is not easily affected by the movement of the transmitting mirror seat due to the limiting effect of the sinking groove on the circuit board, so the circuit board is not easy to shake when the transmitting end is AA.

[0012] In one embodiment, an air extraction channel connected to the sinking groove is further opened on the peripheral side of the first support beam, and the bracket further includes a vacuum air nozzle installed at the channel opening of the air extraction channel.

[0013] With this arrangement, the suction force generated by the exhaust firmly fixes the circuit board in the sinking groove, further reducing the shaking of the circuit board.

[0014] In one embodiment, the bracket includes a support column arranged offset from the central axis and a second support beam extending from the top of the support column toward the central axis. The mounting position is located on the second support beam and is provided with a mounting hole that vertically passes through the second support beam. The mounting hole is used to clamp the mounting frame of the surround-view TOF module.

[0015] In this way, the setting of the mounting hole provides a structural basis for subsequent calibration. The transmitting end passes through the mounting hole, thereby being able to emit light toward the annular target plate. In addition, the shaking of the annular TOF module is reduced by clamping the mounting hole.

[0016] In one embodiment, a support step and a spring pin located above the support step are provided in the mounting hole, and the spring pin is used to abut against the mounting frame of the surround-view TOF module.

[0017] With such arrangement, the spring pin extends radially and is used to define the mounting frame of the surround-view TOF module, so that the surround-view TOF module can be quickly positioned to a preset mounting position.

[0018] In one embodiment, the assembly platform also includes a frame, a platform plate fixed to the bottom of the frame, and a support frame fixed to the top of the frame, the annular mark plate is fixedly connected to the frame and surrounds the platform plate, the bracket and the clamping claw assembly are respectively installed on the platform plate, and the camera is installed on the support frame.

[0019] With this arrangement, the positions of the annular target plate, bracket, clamping claw assembly and camera are relatively fixed, which facilitates overall shifting without the need for repeated adjustments.

[0020] In one embodiment, the assembly platform also includes an arc-shaped turntable, which includes a fixed part fixed to the platform plate and a rotating part rotatably installed on the fixed part. The rotating part rotates around the central axis, and the bracket is fixed to the arc-shaped turntable.

[0021] With this setting, the 10° gap in the point cloud image can be filled by rotating the arc turntable, and a complete imaging can be obtained by coordinating the image fitting algorithm, thereby obtaining complete 360° calibration data.

[0022] In one embodiment, the fixing portion is provided with an annular groove, the rotating portion is a load-bearing ring matching the annular groove, the center of the annular groove overlaps with the central axis, and the bracket is fixedly connected to the load-bearing ring.

[0023] With this setting, the cooperation between the bearing ring and the ring groove ensures that the mounting position on the bracket is always on the central axis during rotation, and will not deviate or shake arbitrarily, ensuring that the two images used for fitting can remain highly similar, thereby improving calibration accuracy.

[0024] In one embodiment, the assembly platform further comprises a reducing ring mounted on the frame, the reducing ring is inserted into the annular plate and the inner ring diameter of the reducing ring is variable, and the bracket and the clamping jaw assembly are located within the inner ring of the reducing ring.

[0025] This setting, by adjusting the diameter of the inner ring, facilitates distance testing of the assembled surround-view TOF module on the same assembly platform, without the need to move to other locations for testing. When problems are found during the distance test, timely calibration is convenient, saving the overall time of calibration and testing.

[0026] In one embodiment, the reducing ring includes a plurality of blades inserted into the annular plate, the blades having a connecting end rotatably connected to the frame, an abutting end located inside the annular plate and away from the annular plate, and a guide arc surface located between the connecting end and the abutting end and facing the central axis, the abutting end can slidably abut the guide arc surface of another blade, and the plurality of blades are stacked in sequence along the circumferential direction.

[0027] This setting can test the ranging performance of the calibrated surround-view TOF module under different working conditions, thereby verifying the calibration results. The variable diameter ring can also be used to calibrate different models of surround-view TOF modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a structural diagram of the surround-view TOF module;

[0029] Figure 2 for Figure 1The exploded structure diagram of the surround-view TOF module is shown;

[0030] Figure 3 This is a structural diagram of an assembly platform in one embodiment of the present application;

[0031] Figure 4 Schematic diagram of the structure of the bracket for the transmitting end AA;

[0032] Figure 5 Schematic diagram of the structure of the bracket for transmitting and receiving AA;

[0033] Figure 6 A schematic diagram of the combined structure of an arc-shaped turntable and a bracket in one embodiment provided in this application;

[0034] Figure 7 for Figure 6 A schematic diagram of the structure of the fixed part of the middle arc turntable;

[0035] Figure 8 A schematic structural diagram of an assembly platform in another embodiment provided in this application;

[0036] Figure 9 Schematic diagram of the light wave function involved in the calculation of phase difference during the calibration process.

[0037] Reference numerals:

[0038] 10P, surround view TOF module; 11P, transmitter; 111P, circuit board; 112P, light source; 113P, transmitter lens holder; 114P, transmitter lens; 12P, receiver; 121P, circuit board; 122P, sensor; 123P, receiver lens holder; 124P, receiver lens; 13P, mounting bracket; 10, rack; 20, platform plate; 30, support frame; 40, annular plate; 41, central axis; 50, bracket; 501, mounting position; 51, Support column; 52, first support beam; 521, sinking groove; 522, exhaust channel; 523, vacuum air nozzle; 53, second support beam; 531, mounting hole; 532, support step; 533, spring pin; 60, clamping jaw assembly; 70, camera; 80, arc turntable; 81, fixing part; 811, annular groove; 82, rotating part; 821, load-bearing ring; 90, reducing ring; 91, blade; 911, connecting end; 912, abutting end; 913, guiding arc surface. DETAILED DESCRIPTION

[0039] In order to make the above object, characteristics and advantages of the present application more apparent, concrete embodiments of the present application will be described in detail with reference to the drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different manners without departing from the spirit of the present application. Those skilled in the art will appreciate the scope of the present application and can make similar modifications without departing from the spirit of the present application. Therefore, the present application is not limited by the embodiments disclosed below.

[0040] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0041] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0042] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0044] It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only embodiment.

[0045] At present, 360-degree surround view distance test (TOF) modules such as laser radar, solid-state laser radar products and the like appear in the market, and the pattern projection surface of the traditional TOF device during calibration or AA (Active Alignment) test is a plane, which cannot test the 360-degree ring completely. For the surround view TOF device, the traditional scheme calibration plane can only calibrate part of the field of view angle, and the distance from different field of view angles to the module is also different; in addition, the traditional TOF calibration device has relatively single function: for example, the calibration device can only implement calibration operation, and the AA device can only implement AA operation, which leads to longer production cycle of the TOF device and higher time cost.

[0046] Please refer to Figure 1 and Figure 2 , Figure 1 is a structural schematic view of the surround view TOF module 10P, Figure 2 is Figure 1An exploded structural schematic diagram of the surround view TOF module 10P is shown. The surround view TOF module 10P includes a mounting frame 13P, a transmitting end 11P and a receiving end 12P mounted on opposite sides of the mounting frame 13P. Specifically, the transmitting end 11P includes a circuit board 111P, a light source 112P mounted on the circuit board 111P, a transmitting lens seat 113P covering the light source 112P, and a transmitting lens 114P mounted on the transmitting lens seat 113P and located in the light path of the light source 112P. The receiving end 12P includes a circuit board 121P, a sensor 122P mounted on the circuit board 121P, a receiving lens seat 123P covering the sensor 122P and mounted on the circuit board 121P, and a receiving lens 124P mounted on the receiving lens seat 123P and located in the light path of the sensor 122P. The circuit board 111P is electrically connected to the circuit board 121P. The transmitting end 11P transmits light of a specific phase to an object to be measured, and the receiving end 12P receives light reflected by the object to be measured. According to the phase difference between the transmitted light and the reflected light, the distance between the surround view TOF module 10P and the object to be measured can be inferred. Figure 1 The annular pie-shaped body on the upper side is the field of view angle range of the light emitted from the transmitting lens 114P, and the conical flat body on the lower side is the field of view angle range of the light that can be received by the receiving lens 124P. As can be known from the working principle of the surround view TOF module 10P, the ranging accuracy of the surround view TOF module 10P is related to the installation accuracy and calibration accuracy of the transmitting end 11P and the receiving end 12P.

[0047] Therefore, it is necessary to provide an assembly platform capable of implementing the transmission end AA, the transmission & reception AA, the calibration and the testing of the surround view TOF module 10P. The transmission end AA refers to aligning the transmitting lens 114P with the light source mounted on the circuit board 111P, so that the annular light spot emitted from the transmitting lens 114P meets the requirements. The transmission & reception AA refers to aligning the receiving lens 124P with the transmitting lens 114P.

[0048] Please refer to Figure 2 and Figure 3 , Figure 3 The structure schematic diagram of the assembly platform in an embodiment of the present application is shown. The assembly platform provided by the present application includes an annular calibration plate 40, a bracket 50, a jaw assembly 60, and a camera 70. The bracket 50 has a mounting position 501 for supporting the surround view TOF module 10P, and the mounting position 501 is located on the central axis 41 of the annular calibration plate 40. The jaw assembly 60 is located on one side of the bracket 50 and is used for clamping the transmitting end 11P or the receiving end 12P of the surround view TOF module 10P. The camera 70 is located above the mounting position 501 along the central axis 41.

[0049] The assembly platform provided by the present application can ensure the assembly accuracy of the surround-view TOF module through the transmitting end AA and the transmitting & receiving AA. The transmitting end AA process is as follows: pre-apply curing glue between the transmitting mirror base 113P equipped with the transmitting lens 114P and the circuit board 111P equipped with the light source. At this time, the relative position between the transmitting mirror base 113P and the circuit board 111P can still be adjusted. The light source 112P is lit, and the light of the annular field of view angle is emitted to the annular target plate 40 through the transmitting lens 114P. The image projected by the transmitting lens 114P on the annular target plate 40 is received by the upper camera 70. The transmitting mirror base 113P is fine-tuned by the clamping claw assembly 60 to drive the transmitting lens 114P to move, so that the image on the annular target plate 40 meets the requirements, and then the transmitting mirror base 113P and the circuit board 111P are fixed by irradiating the curing glue with an exposure lamp. Based on this structure, the transmit and receive AA is further implemented. During the transmit and receive AA, the transmitter 11P transmits light to the cylindrical surface of the annular target plate 40, and the receiver 12P receives the light reflected by the cylindrical surface. The clamping jaw assembly 60 adjusts the angle until the image meets the standard, and then the receiving lens base 123P is fixed to the circuit board 121P. At this point, after two AA, the assembly accuracy of the surround-view TOF module 10P is guaranteed, providing a structural foundation for achieving precise calibration in the next step. It is understandable that the receiving lens base 123P and the circuit board 121P can also be fixed with light-curing adhesive. During calibration, the clamping assembly 60 is lowered or removed to avoid obstruction of the light emitted by the transmitting end 11P. The transmitting end 11P transmits light to the annular target plate 40, and the receiving end 12P receives the light reflected by the annular target plate 40, and measures and calculates the phase difference between the two beams of light. The phase difference corresponds to the radius of the annular target plate 40, thereby completing the calibration. One lighting can achieve calibration of most of the 360° range, and the distance between the reflecting surface and the transmitting end 11P is the same when the transmitting end 11P transmits at different angles, thereby achieving accurate calibration of the surround-view TOF module 10P.

[0050] See also Figure 9 , Figure 9 This is a schematic diagram of the signal wave function involved in the calculation of the phase difference during the calibration process. The dotted line in the figure represents the signal at the transmitting end, and the solid line represents the signal at the receiving end. The specific calculation method is as follows:

[0051] Assume that the transmitting end signal is D1=A1cos(x), and the receiving end signal is

[0052] Then the D1, D2, D3, and D4 signals are:

[0053]

[0054] The four-step phase shift method can be obtained:

[0055] Receiver signal amplitude

[0056] Signal difference between the transmitter and receiver

[0057] Distance of the measured object

[0058] Theoretical distance noise

[0059] Where S / N is the signal-to-noise ratio, f mod represents the modulation frequency, k represents the modulation coefficient, N phase Indicates the number of measured sinusoidal signals.

[0060] Calibration can reduce the impact of distance noise on module ranging, thereby improving the accuracy of surround view TOF module 10P ranging.

[0061] See also Figure 1 、 Figure 2 and Figure 4 , Figure 4 The present invention is a structural diagram of a bracket 50 for a transmitting terminal AA. Specifically, the bracket 50 includes a support column 51 and a first support beam 52. The support column 51 is arranged offset from the central axis 41. The first support beam 52 extends from the top of the support column 51 toward the central axis 41. The mounting position 501 is located on the first support beam 52 and is provided with a sinking groove 521 for clamping the circuit board 111P of the surround-view TOF module 10P. Preferably, the shape of the sinking groove 521 matches the shape of the circuit board 111P. When the clamping jaw assembly 60 adjusts the transmitting mirror seat 113P of the transmitting terminal 11P, due to the limiting effect of the sinking groove 521 on the circuit board 111P, the circuit board 111P is not easily affected by the movement of the transmitting mirror seat 113P. Therefore, the circuit board 111P is not easy to shake when the transmitting terminal AA. In order to further reduce the shaking of the circuit board 111P, an exhaust channel 522 connected to the sinking groove 521 is further opened on the peripheral side of the first support beam 52. The bracket 50 also includes a vacuum air nozzle 523 installed at the channel opening of the exhaust channel 522.

[0062] See also Figure 2 and Figure 5 , Figure 5Schematic diagram of the structure of the bracket 50 for transmitting and receiving AA. When the lens is AA, the bracket 50 also includes a second support beam 53 that provides the mounting position 501. The second support beam 53 extends from the top of the support column 51 toward the central axis 41. The mounting position 501 is provided with a mounting hole 531 that vertically passes through the second support beam 53. The mounting hole 531 is used to clamp the mounting bracket 13P of the surround-view TOF module 10P. The first support beam 52 and the second support beam 53 respectively provide mounting positions 501, which realizes the multi-purpose use of the platform and reduces the space occupied by the platform. Specifically, a support step 532 and a spring pin 533 located above the support step 532 are provided in the mounting hole 531. The spring pin 533 extends radially and is used to abut the mounting bracket 13P of the surround-view TOF module 10P, so that the surround-view TOF module 10P can be quickly positioned to a preset mounting position. It is understandable that the spring pin 533 may also be a rubber bump, a snap, a cover with a torsion spring, etc., as long as the surround-view TOF module 10P can be positioned in the mounting hole 531.

[0063] See also Figure 3 The assembly platform provided in the present application also includes a frame 10, a platform plate 20 fixed to the bottom of the frame 10, and a support frame 30 fixed to the top of the frame 10. The annular mark plate 40 is fixedly connected to the frame 10 and surrounds the platform plate 20. The bracket 50 and the clamping claw assembly 60 are installed on the platform plate 20, and the camera 70 is installed on the support frame 30. In this way, the positions of the annular mark plate 40, the bracket 50, the clamping claw assembly 60 and the camera 70 are relatively fixed, which facilitates the overall displacement and does not require repeated adjustment.

[0064] See also Figure 1 、 Figure 3 、 Figure 6 and Figure 7 , Figure 6 This is a schematic diagram of the combined structure of the arc-shaped turntable 80 and the bracket 50 in one embodiment provided in this application. Figure 7 for Figure 6 Schematic diagram of the structure of the fixed portion 81 of the middle arc-shaped turntable 80. During calibration, the light emitted by the transmitting end 11P is partially blocked by the support column 51, resulting in partial loss of the image on the annular target plate 40. This further causes a gap of approximately 10° in the point cloud generated by the light reaching the receiving end 12P. To solve this technical problem, the assembly platform of the present application also includes an arc-shaped turntable 80 rotatably mounted on the platform plate 20 and with the central axis 41 as the rotation center. The bracket 50 is fixed to the arc-shaped turntable 80. By rotating the arc-shaped turntable 80, the 10° gap in the point cloud can be filled, and a complete image can be obtained by cooperating with the image fitting algorithm, thereby obtaining complete 360° calibration data.

[0065] See also Figure 6 and Figure 7 ,Figure 6 Figure 2 shows a schematic view of the combination of the arc-shaped turntable 80 and the support 50 according to one embodiment of the present application, Figure 7 Figure 6 Figure 3 shows a schematic view of the fixed part 81 of the arc-shaped turntable 80 according to one embodiment of the present application. Specifically, the arc-shaped turntable 80 comprises a fixed part 81 and a rotating part 82, the fixed part 81 is fixedly arranged on the platform plate 20, the rotating part 82 is rotatably arranged on the fixed part 81 and the rotating part 82 rotates around the central axis 41, and the support 50 is fixedly arranged on the rotating part 82. Specifically, the fixed part 81 is provided with a circular groove 811, the rotating part 82 is provided with a bearing circular ring 821 matched with the circular groove 811, the center of the circular groove 811 overlaps with the central axis 41, and the support 50 is fixedly connected to the bearing circular ring 821. The cooperation between the bearing circular ring 821 and the circular groove 811 ensures that the mounting position 501 on the support 50 is always on the central axis 41 during rotation, and cannot be randomly deviated and shaken, which ensures that the two images to be fitted can maintain high similarity, thereby improving the calibration accuracy.

[0066] Please refer to Figure 8 , Figure 8 ​A schematic diagram of the structure of an assembly platform in another embodiment provided by the present application. Furthermore, when the surround-view TOF module fails the test, it needs to be recalibrated, which brings a certain amount of time cost. In order to avoid this problem, the assembly platform provided by the present application also includes a reducing ring 90 installed on the frame 10, and the reducing ring 90 is inserted into the annular standard plate 40 and the inner diameter of the reducing ring 90 is variable. The bracket 50 and the clamping jaw assembly 60 are located in the inner ring of the reducing ring 90. By adjusting the diameter of the inner ring, it is convenient to perform distance testing on the assembled surround-view TOF module on the same assembly platform without having to transfer it to other locations for testing. When problems are found in the distance test, it is convenient to calibrate in time, saving the overall time of calibration and testing. Specifically, the reducing ring 90 includes a plurality of blades 91 inserted into the annular reference plate 40. The blades 91 have a connecting end 911, an abutting end 912, and a guide arc surface 913. The connecting end 911 is rotatably connected to the frame 10, the abutting end 912 is located within the annular reference plate 40, and the guide arc surface 913 is located between the connecting end 911 and the abutting end 912 and faces the central axis 41. The abutting end 912 can slidably abut against the guide arc surface 913 of another blade 91. The plurality of blades 91 are stacked sequentially along the circumferential direction. In one embodiment provided herein, the reducing ring 90 includes a total of six blades 91, each shaped to conform to the annular reference plate 40. During calibration, the blades 91 abut against the annular reference plate 40, and the inner ring is a standard circle. During testing, the blades 91 are rotated to cause the abutting end 912 to slide on the guide arc surface 913, and the guide arc surface 913 and the abutting end 912 together form a new approximate circle. This allows the ranging performance of the calibrated surround view TOF module 10P to be tested under different operating conditions, thereby verifying the calibration results. From another perspective, the variable diameter ring 90 is essentially a target plate with a variable inner diameter, and the aforementioned annular target plate 40 is used here to limit the blades 91 of the variable diameter ring 90, preventing the blades 91 from rotating too far and separating from each other.

[0067] See also Figure 3 or Figure 8 The clamping jaw assembly 60 includes a pair of clamping members and a six-axis adjustment device driven by the clamping members. The six-axis adjustment device is mounted on the target plate. The six-axis adjustment device can adjust the six degrees of freedom of the surround-view TOF module, thereby improving the assembly accuracy of the assembly platform.

[0068] In summary, based on the above description, the assembly platform provided by this application has at least the following three advantages:

[0069] 1. This application covers three functions: AA assembly and debugging, calibration and testing;

[0070] 2. The annular target plate 40 designed in this application can cover the entire viewing angle of the 360° surround TOF module calibration. Even if the bracket 50 blocks part of the viewing angle, it can be compensated by rotating the bracket 50 and using the fitting algorithm;

[0071] 3. The design of the reducing ring 90 provides a structural basis for various working condition tests of the calibrated surround view TOF module, saves platform space, and can also adapt to the calibration of different surround view TOF modules.

[0072] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. Assembly platform for surround view TOF module, characterized by: include: Ring sign plate; A bracket having a mounting position located on the central axis of the annular target plate and used to support the surround-view TOF module; a clamping claw assembly, the clamping claw assembly being located on one side of the bracket and being used to clamp the transmitting end or the receiving end of the surround-view TOF module; and A camera is arranged above the installation position along the central axis.

2. The assembly platform according to claim 1, characterized in that: The bracket includes a support column arranged away from the central axis and a first support beam extending from the top of the support column toward the central axis. The mounting position is located on the first support beam and is provided with a sinking groove for clamping the circuit board of the surround-view TOF module.

3. The assembly platform according to claim 2, characterized in that: An air extraction channel connected to the sinking groove is further provided on the peripheral side of the first support beam, and the bracket further includes a vacuum air nozzle installed at the channel opening of the air extraction channel.

4. The assembly platform according to claim 1, characterized in that: The bracket includes a support column arranged away from the central axis and a second support beam extending from the top of the support column toward the central axis. The mounting position is located on the second support beam and is provided with a mounting hole that vertically passes through the second support beam. The mounting hole is used to clamp the mounting frame of the surround-view TOF module.

5. The assembly platform according to claim 4, characterized in that: A support step and a spring pin located above the support step are provided in the mounting hole, and the spring pin is used to abut against the mounting frame of the surround-view TOF module.

6. The assembly platform according to any one of claims 1 to 5, characterized in that: The assembly platform also includes a frame, a platform plate fixed to the bottom of the frame, and a support frame fixed to the top of the frame. The annular mark plate is fixedly connected to the frame and surrounds the platform plate. The bracket and the clamping claw assembly are respectively installed on the platform plate, and the camera is installed on the support frame.

7. The assembly platform according to claim 6, characterized in that: The assembly platform also includes an arc-shaped turntable, which includes a fixed part fixed to the platform plate and a rotating part rotatably installed on the fixed part. The rotating part rotates around the central axis, and the bracket is fixed to the arc-shaped turntable.

8. The assembly platform according to claim 7, characterized in that: The fixing portion is provided with an annular groove, the rotating portion is a load-bearing annular ring matching the annular groove, the center of the annular groove overlaps with the central axis, and the bracket is fixedly connected to the load-bearing annular ring.

9. The assembly platform according to claim 6, characterized in that: The assembly platform further comprises a reducing ring mounted on the frame, the reducing ring is inserted into the annular standard plate and the inner ring diameter of the reducing ring is variable, the bracket and the clamping jaw assembly are located inside the inner ring of the reducing ring.

10. The assembly platform according to claim 9, characterized in that: The reducing ring includes a plurality of blades inserted into the annular scale plate, each blade having a connecting end rotatably connected to the frame, an abutting end located inside the annular scale plate and away from the annular scale plate, and a guide arc surface located between the connecting end and the abutting end and facing the central axis, the abutting end can slidably abut the guide arc surface of another blade, and the plurality of blades are stacked in sequence along the circumferential direction.

Images