阅读说明：本技术 一种激光雷达调节装置 (Laser radar adjusting device ) 是由 疏达 李�远 张海武 南景洋 于 2020-03-27 设计创作，主要内容包括：本申请涉及一种激光雷达调节装置,包括发射基座、双发射光纤头、第一夹持件、第二夹持件、调节螺纹组,发射基座上开设有发射孔,所述的第一夹持件、第二夹持件设置在发射基座上,用于夹持双发射光纤头,双发射光纤头经夹持后穿过发射孔并可在孔内旋转,发射基座上还设有第一凸台,第一凸台开设有调节孔,第一夹持件上设有第二凸台,第一、第二凸台相对,调节螺纹组穿过调节孔顶在第二凸台上,旋转调节螺纹组可推动第二凸台转动,进而带动第一夹持件、双发射光纤头旋转,弹簧机构用于连接并拉近第一、第二凸台,保证调节螺纹组顶部始终与第二凸台接触。本申请实施例可对双发射光纤头出射方向进行调节。(The application relates to a laser radar adjusting device, which comprises an emitting base, double emitting optical fiber heads, a first clamping piece, a second clamping piece and an adjusting thread group, wherein an emitting hole is formed in the emitting base, the first clamping piece and the second clamping piece are arranged on the emitting base, is used for clamping double-emission optical fiber heads which pass through the emission hole and can rotate in the emission hole after being clamped, a first boss is also arranged on the emission base, an adjusting hole is arranged on the first boss, a second boss is arranged on the first clamping piece, the first boss and the second boss are opposite, an adjusting thread group passes through the adjusting hole and is propped against the second boss, and the rotating adjusting thread group can push the second boss to rotate, and then drive first holder, the fine head rotation of dual emission, spring mechanism is used for connecting and drawing close first, second boss, guarantees to adjust the screw thread group top and contact with the second boss all the time. The embodiment of the application can adjust the emergent direction of the double-emitting optical fiber head.)

1. A lidar adjustment device, comprising: the dual-emission optical fiber head clamping device comprises an emission base, a dual-emission optical fiber head, a first clamping piece, a second clamping piece, an adjusting thread group and a spring mechanism, wherein an emission hole is formed in the emission base, the first clamping piece and the second clamping piece are arranged on the emission base and used for clamping the dual-emission optical fiber head, the dual-emission optical fiber head passes through the emission hole after being clamped and can rotate in the emission hole, a first boss is further arranged on the emission base, the adjusting hole is formed in the first boss, a second boss is arranged on the first clamping piece, the first boss and the second boss are opposite, the adjusting thread group penetrates through the adjusting hole and abuts against the second boss, the rotating adjusting thread group can push the second boss to rotate so as to drive the first clamping piece and the dual-emission optical fiber head to rotate, and the spring mechanism is used for connecting and drawing the first boss and the second boss close to ensure that the top of the adjusting thread group is always in contact with the second boss.

2. The lidar adjusting apparatus of claim 1, wherein the dual emission fiber head comprises an optical fiber and a circular tube for encapsulating the optical fiber, the circular tube passes through the emission hole after being clamped by the first clamping member and the second clamping member, the optical fiber emits two laser beams from the light exit end, and the two laser beams are axisymmetric with respect to an axis of the circular tube.

3. The lidar adjusting apparatus of claim 2, wherein the outer wall of the circular tube is provided with a linear mark for marking the relative positions of the two laser beams, the rear end surface of the first clamping member is provided with a cross mark, and the linear mark on the circular tube is aligned with the cross mark of the first clamping member before the adjustment screw group rotates.

4. The lidar adjusting apparatus of claim 3, wherein the diameter of the circular tube is the same as the inner diameter of the laser emitting hole, and the portion of the circular tube extending out of the clamping member is inserted into the laser emitting hole to rotate without clearance, and the rotating shaft is a rotating shaft for rotation adjustment.

5. The lidar adjustment device of claim 4, wherein the length of the circular tube extending beyond the first clamping member is 7-8 mm.

6. The lidar adjustment device of claim 5, wherein the adjustment screw head has a hemispherical shape and a pitch of 0.1-0.25 mm.

7. The lidar adjustment device of claim 6, wherein the adjustment screw is adjustable within a range of ± 5 °.

8. The lidar adjustment device of claim 6, wherein the adjustment screw is adjustable within a range of ± 3 °.

9. The lidar adjustment apparatus of claim 8, wherein the first clamping member defines a waist hole, and a screw is inserted through the waist hole to secure the first clamping member to the transmitting base.

10. The lidar adjustment apparatus of claim 9, wherein the range of the arc length of the waist hole is equal to or greater than ± 3 ° of the adjustment range.

Technical Field

The application relates to the technical field of laser radars, in particular to a laser radar adjusting device.

Background

The laser radar is an active distance detection device which adopts an LED or a laser as a transmitting light source and adopts a photoelectric detection technical means. The laser radar mainly comprises a control module, a transmitting module and a receiving module. The control module controls the work of the transmitting module and the receiving module. The emitting module comprises various forms of lasers or LEDs and emitting lenses; the receiving module comprises a receiving lens, various photoelectric detectors, photoelectric chips and the like; the laser radar emits light beams with specified wavelength through an LED or a laser, the light beams irradiate a target object after being adjusted by a transmitting lens, the light beams reflected by the target object are received by a photoelectric sensor after being adjusted by a receiving lens, echo signals reflected by the target are converted into electric signals, and the electric signals are processed by a main control system to obtain a distance value from a measuring system to the target object.

In the existing laser radar system, the field of view of the laser scanning system using a single transmitting module and a single receiving module is not large enough to cover a large-range high-resolution test environment, and in order to enable the laser radar to have higher scanning resolution, a person skilled in the art often uses a dual-transmitting laser scanning module to realize high-resolution scanning in the vertical direction. The dual emission laser corresponds to the dual receiving detector, and the dual emission laser needs to be rotationally adjusted in order that the dual receiving detector can accurately receive the dual emission laser and a received signal reaches an optimal state. In the prior art, no special device for adjusting the double-emitting laser exists.

Disclosure of Invention

The embodiment of the application provides a laser radar adjusting device, which can accurately adjust the emitting laser emitting direction of a double-emitting laser, change the relative position of the emitting laser and a receiving detector, enable the received signal to reach the optimal state, and ensure the smooth and reliable adjusting process.

The following technical scheme is adopted in the application:

in one aspect, a lidar adjustment apparatus includes: the transmission base is provided with a transmission hole, the first clamping piece and the second clamping piece are arranged on the transmission base and used for clamping the double-emission optical fiber heads, the double-emission optical fiber heads penetrate through the transmission hole after being clamped and can rotate in the hole, the transmission base is further provided with a first boss, the first boss is provided with an adjusting hole, the first clamping piece is provided with a second boss, the first boss and the second boss are opposite, the adjusting thread group penetrates through the adjusting hole and abuts against the second boss, the rotating adjusting thread group can push the second boss to rotate, the first clamping piece and the double-emission optical fiber heads are driven to rotate, the spring mechanism is used for connecting and approaching the first boss and the second boss, and the top of the adjusting thread group is guaranteed to be always in contact with the second boss.

In a possible implementation manner, the dual-emission fiber head includes an optical fiber and a circular tube for packaging the optical fiber, the circular tube passes through the emission hole after being clamped by the first clamping member and the second clamping member, the optical fiber emits two laser beams from the circular tube, and the two laser beams are axisymmetric with respect to an axis in the circular tube.

In a possible implementation mode, the outer wall of the circular tube is provided with linear marks for marking the relative positions of the two laser beams, the rear end face of the first clamping piece is provided with a cross mark line, and the linear marks on the circular tube are aligned with the cross mark line of the first clamping piece before the thread group is adjusted to rotate.

In a possible implementation mode, the diameter of the circular tube is the same as the inner diameter of the emitting hole, the part of the circular tube, which extends out of the clamping piece, is inserted into the laser emitting hole and rotates without clearance, and the rotating shaft is the rotating shaft for rotation adjustment.

In a possible realization mode, the length of the circular tube extending out of the first clamping piece is 7-8 mm.

In a possible realization mode, the head of the adjusting screw is in a hemispherical shape, and the thread pitch is 0.1-0.25 mm.

In a possible implementation manner, the adjusting screw is adjusted within a range of ± 5 °.

In a possible implementation manner, the adjusting screw is adjusted within a range of ± 3 °.

In a possible implementation manner, the first clamping piece is provided with a waist hole, and a screw passes through the waist hole to fix the first clamping piece on the emission base.

In a possible implementation manner, the arc length range of the waist hole is more than or equal to the adjusting range +/-3 degrees.

The fixed two optic fibre heads of transmission of holder is passed through to this application embodiment, and through adjusting the screw thread group and promote first holder, the optic fibre head of two transmissions rotatory, and the optic fibre head of two transmissions can be at the emission downthehole internal rotation, consequently can adjust the optic fibre head outgoing direction of two transmissions, and the tight smooth zero clearance of regulation process, the precision is high, and the reliability is high.

Drawings

Fig. 1 is an overall schematic diagram of a laser radar adjusting device according to the present application.

Fig. 2 is a rear view of the present application (without the spring shown).

FIG. 3 is a schematic view of a dual emission fiber head of the present application.

In the figure: 1. an emission base; 2. a dual emission fiber tip; 3. a first clamping member; 4. a second clamping member; 5. adjusting the thread group; 6. an adjustment hole; 7. a first boss; 8. a second boss; 9. an optical fiber; 10. a circular tube; 11. marking a straight line; 12. a cross mark line; 13. a spring mechanism; 14. a waist hole; 15. a screw; 16. and a light emitting end.

Detailed Description

The technical scheme of the application is further explained by the specific implementation mode in combination with the attached drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

As shown in fig. 1 and 2, a lidar adjustment apparatus includes: the device comprises an emission base 1, a double-emission optical fiber head 2, a first clamping piece 3, a second clamping piece 4 and an adjusting thread group 5, wherein an emission hole (not shown in the figure) is formed in the emission base 1, the first clamping piece 3 and the second clamping piece 4 are arranged on the emission base 1, used for clamping the double-emission optical fiber head 2, the double-emission optical fiber head 2 passes through the emission hole after being clamped and can rotate in the hole, the emission base 1 is also provided with a first boss 7, the first boss 7 is provided with an adjusting hole 6, the first clamping piece 3 is provided with a second boss 8, the first boss and the second boss are opposite, as shown in fig. 2, the adjusting screw thread group 5 passes through the adjusting hole and abuts against the second boss 8, the adjusting screw thread group 5 is rotated to push the second boss 8 to rotate, and then drive first holder 3, the fine head 2 rotation of dual emission, spring mechanism 13 is used for connecting and drawing close first, second boss, guarantees to adjust 5 tops of screw group and contact with second boss 8 all the time.

In the embodiment, the first clamping piece 3 is combined with the second clamping piece 4 to fix the position of the double-emission optical fiber head 2, so that the vertical position of the double-emission optical fiber head is unchanged, the double-emission optical fiber head 2 passes through the emission hole and can rotate in the emission hole after being clamped by the first clamping piece 3 and the second clamping piece 4, an operator rotates the adjusting thread group 5 clockwise, the length of the adjusting thread group 5 extending out of the first boss 7 is increased, the second boss 8 is pushed to rotate anticlockwise, and the second boss 8 rotates to drive the first clamping piece 3 and the double-emission optical fiber head 2 to rotate anticlockwise for adjustment; anticlockwise rotation adjusts screw group 5, and the length that first boss 7 was stretched out to adjusting screw group 5 reduces, and under spring mechanism's effect, adjusting screw group 5 contradicts second boss 8 clockwise turning all the time, and the clockwise rotation of two emission fiber head 2 is adjusted. The double-emitting optical fiber head 2 rotates anticlockwise or clockwise, emergent light from the double-emitting optical fiber head 2 is adjusted accordingly, so that adjustment of the relative position between emitting laser and a receiving device of the double-emitting laser is achieved, received signals reach the best state, and the adjusting process is smooth and reliable.

As shown in fig. 3, the dual-emission fiber head includes an optical fiber 9 and a circular tube 10 for packaging the optical fiber, the circular tube 10 passes through the emission hole 6 after being clamped by the first clamping member 3 and the second clamping member 4, the optical fiber 9 emits two laser beams from the light emitting end 16, and the two laser beams are axisymmetric with respect to the central axis of the circular tube.

The number of the optical fibers 9 is two, the optical fibers have a common end, laser enters from the common end and exits from the light ray exiting end 16, the included angle between two beams of light is 10-30 degrees, two different directions can be detected, and therefore a larger range can be detected. Because the optical fiber 9 is inconvenient to fix and needs to rotate in the launching hole 6, for this reason, the optical fiber 9 is packaged in the circular tube 10, the circular tube 10 is in contact with the first clamping piece 3 and the second clamping piece 4, and the circular tube 10 can rotate in the launching hole while being fixed by the first clamping piece 4 and the second clamping piece 4. The circular tube 10 is made of metal, and can be made of copper or stainless steel.

The number of optical fibers 9 can be increased, but not more than 5, as desired.

The outer wall of the circular tube 10 is provided with a linear mark 11 for marking the relative positions of the two laser beams, the rear end face of the first clamping piece 3 is provided with a cross mark 12, and before the adjusting thread group 5 rotates, the linear mark 11 on the circular tube 10 is aligned with the cross mark 12 of the first clamping piece 3.

Set up sharp mark 11 on the pipe 10 outer wall for two bundles of laser relative positions of mark outgoing when carrying out the centre gripping to pipe 10, make the sharp mark on the metal pipe aim at with the cross marking of holder 1, carry out preliminary location to two emission fiber optic heads 2.

The diameter of the circular tube 10 is the same as the inner diameter of the emitting hole, the part of the circular tube 10 extending out of the clamping piece is inserted into the laser emitting hole 6 to rotate without clearance, and the rotating shaft is the rotating shaft for rotation adjustment.

The round tube 10 is in close contact with the emission hole and can rotate in the emission hole without clearance, so that the double-emission optical fiber head 2 is ensured to be adjusted around a rotating shaft all the time, and the rotating shaft is a rotation adjusting shaft.

The length of the circular tube 10 extending out of the first clamping piece 3 is 7-8 mm.

The adjusting thread group 5 is a customized fine-thread screw and comprises an adjusting screw and an adjusting sleeve, the adjusting screw is arranged in the adjusting sleeve and tightly combined with the adjusting sleeve, and the adjusting sleeve is tightly combined with the adjusting hole 6.

The head of the adjusting screw is hemispherical, and the thread pitch is 0.1-0.25 mm.

The adjusting range of the adjusting screw is +/-5 degrees.

The adjusting range of the adjusting screw is +/-3 degrees.

The adjusting screw is a customized fine-tooth screw, and the head of the adjusting screw is designed to be hemispherical, so that the adjustment can be smooth. The inner wall of the adjusting sleeve of the adjusting thread group is provided with the same fine thread which is tightly matched with the screw without clearance. The copper bush is installed and fixed in the round hole of the boss 1 of the emission base. The adjusting screw and the adjusting sleeve are made of copper or stainless steel, and the brass and the stainless steel screw are matched with threads, wear-resistant and smooth.

The adjustment accuracy of the adjusting screw is calculated by the following formula: β ° = arctan (p/L), where p is the pitch of the adjusting screw 14, and L is the distance from the contact point of the hemispherical end of the adjusting screw and the second boss 8 to the rotation axis. It follows that the smaller the pitch p, i.e. the finer the thread, or the greater the distance of the contact point to the axis of rotation, the higher the adjustment accuracy, i.e. the smaller β °. The adjusting screw 14 is adjusted within a range of +/-5 degrees, so that emergent light can be detected within a range of +/-5 degrees of the rotating shaft. The preferred adjustment range is ± 3 °.

The first clamping piece 3 is provided with a waist hole 14, and a screw penetrates through the waist hole 14 to fix the first clamping piece 3 on the emission base 1.

The arc length range of the waist hole 14 is more than or equal to the adjusting range +/-3 degrees.

And a screw 15 for fixing the first clamping piece 3 is arranged at the waist hole 14, and the first clamping piece is fastened after the rotation adjustment is finished. By means of the waist hole 14, the first clamping part 3 can be adjusted in the waist hole 14 in a rotating mode on the one hand, and can be fastened after adjustment is completed on the other hand, and the waist hole 14 is required to be in accordance with the rotating range.

The technical principles of the present application have been described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the present application and is not to be construed in any way as limiting the scope of the application. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present application without inventive effort, which shall fall within the scope of the present application.