CN218601470U - Laser measuring system and laser radar - Google Patents
Laser measuring system and laser radar Download PDFInfo
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- CN218601470U CN218601470U CN202223047935.4U CN202223047935U CN218601470U CN 218601470 U CN218601470 U CN 218601470U CN 202223047935 U CN202223047935 U CN 202223047935U CN 218601470 U CN218601470 U CN 218601470U
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Abstract
The utility model belongs to the technical field of laser rangefinder, concretely relates to laser measurement system and laser radar, laser measurement system includes: a bracket including a first end and a second end; an emitting module disposed within the first end for generating first emitted light; the reflecting element is rotatably arranged on one side of the bracket and is used for converting the first emitting light into second emitting light, and the second emitting light forms reflecting light after being reflected by the detected object; a receiving module disposed within the second end for receiving the reflected light; wherein the optical axis of the emitting module is on a first vertical plane, and the rotation central axis of the reflecting element is at the rear side of the first vertical plane; the utility model can adjust the deflection angle of the second emitted light only by rotating the reflection element, and the emitting module and the receiving module do not need to rotate integrally; and preventing the reflective element from reflecting the first emission light source path back to the emission module, thereby protecting the emission module.
Description
Technical Field
The utility model belongs to the technical field of laser surveying, concretely relates to laser surveying system and laser radar.
Background
As described in chinese patent document CN206892339U, CN108318886a, the laser radar is a radar system that detects a characteristic quantity such as a position of a target by emitting a laser beam. The photosensitive sensor of the laser radar can convert the acquired optical pulse signal into an electric signal, and the time information corresponding to the electric signal is acquired based on the comparator, so that the distance information between the laser radar and the target object is obtained.
However, in the conventional laser radar, when scanning, the entire laser measurement system needs to be rotated by the rotating motor, which causes a large burden on the rotating motor.
SUMMERY OF THE UTILITY MODEL
In order to overcome the not enough of prior art, the utility model provides a laser measuring system and laser radar to solve the laser radar that prior art is current when scanning, need drive laser measuring system by the rotating electrical machines and wholly rotate, the great problem of burden of rotating electrical machines.
The utility model discloses one of them scheme provides a laser surveying system, include: a bracket including a first end and a second end;
an emitting module disposed within the first end for generating first emitted light;
the reflecting element is rotatably arranged on one side of the bracket and is used for converting the first emitting light into second emitting light, and the second emitting light forms reflecting light after being reflected by the detected object;
a receiving module disposed within the second end for receiving the reflected light;
the optical axis of the emitting module is on a first vertical surface, the reflecting element is a rotatable polygon, the reflecting element rotates along a first rotation central axis, the first rotation central axis is on the rear side of the first vertical surface, and the first rotation central axis is perpendicular to a horizontal plane.
In one preferred embodiment of the present invention, the side surface of the polygon is a reflection surface, and the reflection surface is used for converting the first emission light into the second emission light.
In one preferred embodiment of the present invention, the reflective element is a hexahedral prism, and the reflective element includes an upper surface, a lower surface, and six side surfaces;
and/or each of the sides is perpendicular to the horizontal plane.
In one preferred embodiment of the present invention, the first end is connected to the second end and forms a predetermined angle;
the first end is provided with a first mounting hole, the second end is provided with a second mounting hole, and the central axis of the first mounting hole is intersected with the central axis of the second mounting hole and is positioned on the same horizontal plane.
In one of the preferable schemes of the present invention, the included angle formed by the reflecting surface and the optical axis of the emitting module is α, and the numerical range of the included angle α is 15 to 45 degrees.
In one of the preferable embodiments of the present invention, the laser measurement system further includes:
the first circuit board is arranged along the vertical direction, arranged at the second end of the bracket and connected with the transmitting module and the receiving module;
and the second circuit board is arranged along the horizontal direction, and the bracket is arranged on the second circuit board.
In one preferred embodiment of the present invention, the transmitting module includes:
a light source having an optical axis parallel to the horizontal plane
The optical axis of the first lens is arranged in parallel with the horizontal plane, the optical axis of the first lens is coaxially arranged with the optical axis of the light source, and light rays emitted by the light source form first emitting light after passing through the first lens;
wherein the optical axis of the first lens and the first emitted light are both on the first vertical surface.
In one preferred embodiment of the present invention, the receiving module includes:
a second lens for condensing the reflected light;
the receiving end is arranged on the optical axis of the second lens and used for receiving the reflected light converged by the second lens;
wherein, the light paths of the first emitted light, the second emitted light and the reflected light are on the same horizontal plane.
In one preferred embodiment of the present invention, the first circuit board is at least provided with a laser emitting circuit and a laser receiving circuit; the second circuit board is at least provided with one or more of an optical communication receiving circuit, a wireless power supply transmitting circuit, a rotating speed and position measuring circuit and a received optical signal processing circuit.
The utility model discloses in one of them preferred scheme, still point out a laser radar, laser radar is provided with any one of above preferred scheme laser measurement system.
The utility model discloses a laser measuring system and laser radar that above scheme provided has following beneficial effect:
1. the utility model converts the first emitting light generated by the emitting module into the second emitting light through the reflecting element, thereby realizing that the second emitting light is emitted at a preset deflection angle; when the laser radar scans, the deflection angle of the second emitted light can be adjusted only by rotating the reflecting element, and the emitting module and the receiving module do not need to rotate integrally, so that the working time of a rotating motor for driving the laser measuring system to rotate integrally can be shortened, and the service life of the rotating motor can be prolonged; and the rotation central axis of the reflecting element is arranged at the rear side of the first vertical surface, so that the reflecting element is prevented from reflecting the first emission light source path back to the emission module, and the emission module is protected.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of a prior art laser measurement system;
fig. 2 is a schematic perspective view of a laser measurement system according to an embodiment of the present invention;
fig. 3 is a schematic diagram showing the positions of the first vertical plane and the first central axis of rotation according to an embodiment of the present invention;
fig. 4 is a schematic diagram of an application of a laser measurement system according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an application of a laser measurement system according to another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture, and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" and/or "appears throughout, the meaning includes three parallel schemes, for example," A and/or B "includes scheme A, or scheme B, or a scheme satisfying both schemes A and B. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
As shown in fig. 1, the position of the transmitting module or the receiving module of the conventional laser radar is fixed and cannot be adjusted, and when the conventional laser radar scans, the whole laser measurement system needs to be driven by the rotating motor to rotate, so that the burden on the rotating motor is large.
Referring to fig. 1 and fig. 2, one aspect of the present invention provides a laser measurement system 100, including: a bracket 110, the bracket 110 including a first end 111 and a second end 112;
an emitting module 120 disposed within the first end 111 for generating a first emitting light;
a reflection element 130 rotatably disposed on one side of the support 110 for converting the first emitting light L1 into a second emitting light L2, wherein the second emitting light L2 is reflected by the detected object to form a reflected light L3;
a receiving module 140 disposed in the second end 112 for receiving the reflected light L3;
wherein the optical axis of the emitting module 120 is onbase:Sub>A first vertical plane A-A, the reflecting element rotates alongbase:Sub>A first central axis of rotation O1, and the first central axis of rotation O1 is behind the first vertical plane A-A.
In this embodiment, the first emitting light L1 emitted by the emitting module 120 is laser light, and specifically, the emitting module 120 includes an Edge Emitting Laser (EEL), and after the edge emitting laser generates laser light, the laser light generated by the edge emitting laser is converted into collimated light by a collimating element.
The reflecting element 130 is configured to convert the first emitting light L1 into a second emitting light L2, an optical path of the first emitting light L1 intersects with an optical path of the second emitting light L2 to form an included angle, the second emitting light L2 is reflected by the detected object to form a reflected light L3, and the receiving module 140 is configured to receive the reflected light L3. In this embodiment, the receiving module 140 includes a photosensitive element. When the photosensitive element receives the optical signal, the distance between the object to be detected and the laser measurement system 100 can be calculated by detecting the time when the emitting module 120 starts emitting the optical signal and the time when the receiving module 140 receives the optical signal. Specifically, the light sensing element is an APD (Avalanche photodiode) element.
In the laser measurement system 100 provided in the above embodiment, the first emitting light L1 is converted into the second emitting light L2 by the reflection element 130, the second emitting light L2 is reflected by the detection object to form the reflected light L3, and the reflected light L3 is received by the receiving module 140. Since the second emitted light L2 is converted by the reflective element 130, the emitting direction of the second reflected light L3 can be adjusted by adjusting the deflection angle of the reflective element 130. That is to say, when the technical scheme of this embodiment is applied to laser radar, when only needing to measure the detected object in front of laser measurement system 100, compare with current technical scheme, this embodiment only needs rotatory reflection component 130 can realize adjusting second transmission light L2 deflection angle, and emission module 120 and receiving module 140 need not the bulk rotation, can be so that the rotating electrical machines operating time who is used for driving laser measurement system 100 bulk rotation shortens to the life of rotating electrical machines.
In this embodiment, the optical axis of the emitting module 120 is on the first vertical planebase:Sub>A-base:Sub>A, the reflecting element 130 rotates along the first central axis of rotation O1, and the first central axis of rotation O1 is on the rear side of the first vertical planebase:Sub>A-base:Sub>A, so that the reflecting surface of the reflecting element 130 always forms an angle with the first emitting light L1, and the first emitting light L1 is prevented from being reflected back to the emitting module 120 by the reflecting element 130, thereby protecting the emitting module 120.
Referring to fig. 2, in one preferred embodiment of the present invention, the reflecting element 130 is a rotatable polygon, and the first central axis of rotation O1 is perpendicular to the horizontal plane.
Since the reflection element 130 is a rotatable polygon, in this embodiment, a driving module may be connected to the reflection element 130 to rotate the reflection element 130 along the first rotation central axis O1, so as to adjust the periodic variation of the deflection angle of the second emitted light L2, and the scanning function of the laser measurement system 100 can be realized without the support 110, the emitting module 120, and the receiving module 130 being rotated integrally.
Referring to fig. 2 and 3, in a preferred embodiment of the present invention, the reflective element 130 is a hexahedral prism, and the reflective element includes an upper surface, a lower surface and six side surfaces;
and/or each side surface is perpendicular to the horizontal plane, and each side surface is a reflecting surface used for converting the first emitting light into the second emitting light.
In this embodiment, the reflection element 130 isbase:Sub>A hexahedral prism, and the reflection element 130 is preferablybase:Sub>A regular hexahedral prism, the side surface of the reflection element 130 perpendicular to the horizontal plane isbase:Sub>A reflection surface, the lower surface isbase:Sub>A plane parallel to the horizontal plane, because the reflection element 130 rotates along the first rotation central axis O1, the first rotation central axis O1 is at the rear side of the first vertical planebase:Sub>A-base:Sub>A, and the side surface of the reflection element 130 for reflecting the first emission light L1 is always inclined to the first vertical planebase:Sub>A-base:Sub>A, so as to prevent the first emission light L1 from being reflected back to the emission module 120 by the reflection element 130, and avoid damaging the emission module 120.
In one application scene, a reflecting film is arranged on the reflecting surface, and the reflecting film is a total reflecting film; since the reflective surface is provided with a total reflection film, when the first emission light L1 is incident on the reflective surface, the first emission light L1 is totally reflected by the reflective element 130 to form a second emission light L2. Since the reflection surface is disposed perpendicular to the horizontal plane, the reflection surface 131 is located in the optical axis direction of the emission module 120 and is always disposed obliquely tobase:Sub>A first vertical planebase:Sub>A-base:Sub>A passing through the first emission light L1; in this embodiment, the reflection element 130 can change the angle of the first emitting light L1 into the second emitting light L2, so that the reflected light L3 of the second emitting light L2 reflected by the object to be detected can be effectively received by the receiving module 140.
In one embodiment of the present invention, the first end 111 is connected to the second end 112 and forms a predetermined angle;
the first end 111 is provided with the first mounting hole, the second end 112 is provided with the second mounting hole, and a central axis of the first mounting hole is intersected with a central axis of the second mounting hole and is located on the same horizontal plane.
Since the first end 111 and the second end 112 of the bracket 110 are manufactured by integral molding, so that a predetermined angle is formed between the first end 111 and the second end 112, and the first mounting hole provided in the first end 111 and the second mounting hole provided in the second end 112 also form a predetermined angle, the transmitting module 120 is installed in the first mounting hole, and the receiving module 140 is installed in the second mounting hole, so that the predetermined angle setting of the transmitting module 120 and the receiving module 140 can be realized.
In this embodiment, since the central axis of the first mounting hole intersects with the central axis of the second mounting hole and is located on the same horizontal plane, the transmitting module 120 is coaxially installed in the first mounting hole, and the receiving module 140 is coaxially installed in the second mounting hole, since the optical axis of the transmitting module 120 coincides with the central axis of the first mounting hole, and the optical axis of the receiving module 140 coincides with the central axis of the second mounting hole, the optical axes of the transmitting module 120 and the receiving module 140 are also located on the same horizontal plane, so as to satisfy the design requirements of the first transmitting light L1 and the reflected light L3 on the same horizontal plane, and it is not necessary to calibrate the transmitting module 120 and the receiving module 140, thereby simplifying the assembly process and improving the assembly efficiency.
Referring to fig. 5, in one preferred embodiment of the present invention, an included angle formed between the reflecting surface and the optical axis of the emitting module 120 is α, and a numerical range of the included angle α is 15 to 45 degrees.
In one application scenario of this embodiment, the laser measurement system measures a distance of an object to be detected within a range of 360 degrees, the laser measurement system 100 is driven by a rotating motor, the laser measurement system 100 rotates along a second rotation central axis O2, and a degree of an included angle α formed by the reflection surface and an optical axis of the emitting module 120 is preferably 37 degrees.
Referring to fig. 2, in one preferred embodiment of the present invention, the laser measurement system further includes:
a first circuit board 150 disposed along a vertical direction, wherein the first circuit board 150 is disposed at the second end 112 of the bracket 110, and the first circuit board 150 is connected to the transmitting module 120 and the receiving module 140;
a second circuit board 160 disposed in a horizontal direction, the bracket 110 being disposed on the second circuit board 160;
the second circuit board 160 has a second rotation central axis O2 arranged in a vertical direction, the second rotation central axis O2 is perpendicular to the second circuit board 160, and the first circuit board rotates around the second rotation central axis.
In one preferred embodiment of the present invention, a mounting hole is formed at a central position of the second circuit board 160. The mounting hole is used to mount the second circuit board 160 on an external rotation shaft. The second circuit board 160 is driven to rotate by the rotation of the external rotation shaft, thereby realizing the detection of the omnibearing obstacle.
Referring to fig. 2, in one preferred embodiment of the present invention, the transmitting module 120 includes:
a light source having an optical axis parallel to the horizontal plane
The optical axis of the first lens 121 is parallel to the horizontal plane, the optical axis of the first lens 121 is coaxial with the optical axis of the light source, and the light emitted by the light source forms the first emitting light L1 after passing through the first lens 121.
Wherein the optical axis of the first lens and the first emitted light are both on the first vertical surface.
In one application scenario of this embodiment, the first lens 121 may be an aspheric lens, and spherical aberration can be eliminated to the maximum extent because the curvature radius of the curved surface of the aspheric lens increases gradually from the center to the edge of the surface. That is, the aspheric lens may converge light rays to the same point, thereby providing collimated light of better optical quality. The optical axis of the first lens 121 is parallel to the horizontal plane, and the laser beam emitted by the light source is collimated by the first lens 121 and finally emitted out of the emitting module 120 to form a first emitting light L1.
Referring to fig. 2, in one preferred embodiment of the present invention, the receiving module includes:
a second lens 141 for condensing the reflected light L3;
a receiving end, disposed on the optical axis of the second lens 141, for receiving the reflected light L3 converged by the second lens 141;
wherein, the optical paths of the first emitted light L1, the second emitted light L2 and the reflected light L3 are on the same horizontal plane.
Since the optical paths of the first emitting light L1, the second emitting light L2, and the reflected light L3 are all on the same horizontal plane, in this embodiment, the laser beam emitted by the light source is collimated by the first lens 121 to form a first emitting light L1 to be emitted out of the emitting module 120, the reflecting element 130 converts the first emitting light L1 into the second emitting light L2, the second emitting light L2 is reflected by the object to be detected to form a reflected light L3, the reflected light L3 is converged by the second lens 141 to form a collimated light or a focus, and the receiving end receives the reflected light L3.
In one preferred embodiment of the present invention, the first circuit board 150 is at least provided with a laser emitting circuit and a laser receiving circuit; the second circuit board 160 is at least provided with one or more of an optical communication receiving circuit, a wireless power transmitting circuit, a rotation speed and position measuring circuit, and a received optical signal processing circuit.
The first circuit board 150 is provided with a laser emitting circuit and a laser receiving circuit, so that the first circuit board can be used for controlling the emitting module 120 to emit a laser beam outwards according to a numerical instruction, and converting the reflected light L3 received by the receiving module 140 into communication information, so as to transmit the communication information to the second circuit board 160 for further data processing.
The utility model discloses in one of them preferred scheme, still point out a laser radar, laser radar is provided with any one of above preferred scheme laser measurement system.
The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.
Claims (10)
1. A laser measurement system, comprising:
a bracket including a first end and a second end;
an emitting module disposed within the first end for generating first emitted light;
the reflecting element is rotatably arranged on one side of the bracket and is used for converting the first emitting light into second emitting light, and the second emitting light forms reflecting light after being reflected by the detected object;
a receiving module disposed within the second end for receiving the reflected light;
the optical axis of the emitting module is on a first vertical surface, the reflecting element is a rotatable polygon, the reflecting element rotates along a first rotation central axis, the first rotation central axis is on the rear side of the first vertical surface, and the first rotation central axis is perpendicular to a horizontal plane.
2. The laser measuring system of claim 1, wherein a side of the polygon is a reflective surface for converting the first emitted light into the second emitted light.
3. The laser measurement system of claim 2, wherein the reflective element is a hexahedral prism, the reflective element including an upper surface, a lower surface, and six side surfaces;
and/or each of the side surfaces is perpendicular to the horizontal plane.
4. The laser measuring system of claim 3, wherein the first end is connected to the second end and forms a predetermined angle;
the first end is provided with a first mounting hole, the second end is provided with a second mounting hole, and the central axis of the first mounting hole is intersected with the central axis of the second mounting hole and is positioned on the same horizontal plane.
5. The laser measurement system of claim 4, wherein the reflecting surface forms an angle α with an optical axis of the emitting module, and the angle α has a value ranging from 15 degrees to 45 degrees.
6. The laser measuring system of claim 5, further comprising:
the first circuit board is arranged along the vertical direction, arranged at the second end of the bracket and connected with the transmitting module and the receiving module;
and the second circuit board is arranged along the horizontal direction, and the bracket is arranged on the second circuit board.
7. The laser measurement system of claim 6, wherein the transmit module comprises:
a light source having an optical axis parallel to the horizontal plane
The optical axis of the first lens is arranged in parallel with the horizontal plane, the optical axis of the first lens is coaxially arranged with the optical axis of the light source, and light rays emitted by the light source form first emitted light after passing through the first lens;
wherein the optical axis of the first lens and the first emitted light are on the first vertical surface.
8. The laser measurement system of claim 7, wherein the receiving module comprises:
a second lens for condensing the reflected light;
the receiving end is arranged on the optical axis of the second lens and used for receiving the reflected light converged by the second lens;
wherein, the optical paths of the first emitted light, the second emitted light and the reflected light are on the same horizontal plane.
9. The laser measuring system of claim 8, wherein the first circuit board is provided with at least a laser emitting circuit, a laser receiving circuit; the second circuit board is at least provided with one or more of an optical communication receiving circuit, a wireless power transmitting circuit, a rotating speed and position measuring circuit and a received optical signal processing circuit.
10. Lidar characterized in that a laser measuring system according to any of claims 1 to 9 is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223047935.4U CN218601470U (en) | 2022-11-16 | 2022-11-16 | Laser measuring system and laser radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223047935.4U CN218601470U (en) | 2022-11-16 | 2022-11-16 | Laser measuring system and laser radar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218601470U true CN218601470U (en) | 2023-03-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223047935.4U Active CN218601470U (en) | 2022-11-16 | 2022-11-16 | Laser measuring system and laser radar |
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| Country | Link |
|---|---|
| CN (1) | CN218601470U (en) |
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- 2022-11-16 CN CN202223047935.4U patent/CN218601470U/en active Active
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