Laser measuring device with good pointing stability

Abstract

The invention relates to the technical field of laser measurement, in particular to a laser measurement device with good pointing stability. The device comprises a shell, a laser generator, a laser channel and an adjusting channel. The laser generator is arranged in the shell, one end of the laser channel is connected with a light outlet of the laser generator, the adjusting channel perpendicularly penetrates through the laser channel, the two ends of the adjusting channel are both connected with external gas cylinders, convex lenses are arranged at the junctions of the adjusting channel and the laser channel, and the convex lenses enable laser beams to penetrate through the adjusting channel. And the temperature or the speed of the flowing air flow in the adjusting channel is controlled to carry out offset adjustment on the laser beam. The laser channel is arranged to be connected with the laser generator, the laser beam which is just emitted is transmitted through the laser channel, the laser channel effectively prevents the laser beam from making contact with the surrounding environment of the laser generator, and the influence of the surrounding environment temperature difference caused by heating of the laser generator on the directivity of the laser beam is avoided; and the laser pointing stability is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of laser measurement, and in particular to a laser measurement device with good pointing stability. Background Art

[0002] Laser measurement is a non-contact, high-precision measurement technology. Its principle usually involves the emission, reflection and reception of lasers. The position, shape or characteristics of the target object are determined by calculating parameters such as the time, angle or intensity of laser propagation. In this process, the pointing stability of the laser beam is directly related to the accuracy and reliability of the measurement results. However, after the laser generator emits the laser beam, it will generate heat, causing changes in the ambient temperature. In an environment with uneven temperature, the laser beam is prone to dispersion, resulting in poor pointing stability. Therefore, a laser measurement device with good pointing stability is required. Summary of the invention

[0003] The object of the present invention is to overcome the above-mentioned shortcomings and provide a laser measuring device with good pointing stability, which has the advantages of good pointing stability and can realize offset adjustment and measurement angle adjustment.

[0004] To achieve the above purpose, the technical solution of the present invention is: a laser measuring device with good pointing stability, including a housing, a laser generator, a laser channel and an adjustment channel. The laser generator is arranged in the housing, one end of the laser channel is connected to the light outlet of the laser generator, the adjustment channel vertically passes through the laser channel, both ends of the adjustment channel are connected to external gas cylinders, and the adjustment channel is provided with a convex lens at the junction with the laser channel, the convex lens enables the laser beam to pass through the adjustment channel, and controls the temperature or speed of the air flow in the adjustment channel to adjust the offset of the laser beam.

[0005] Furthermore, the measuring device also includes an airflow control component, which connects the adjustment channel with an external gas cylinder and is used to achieve switching between the air intake function and the air outlet function at the same end of the adjustment channel.

[0006] Furthermore, the airflow control component includes an outer shell, a slider and an movable ball. A first opening is provided at one end of the outer shell, and a second opening is provided at the other end of the outer shell. One end of the outer shell can be movably inserted into the adjustment channel. The movable ball is arranged in the outer shell, and the slider is arranged between the movable ball and the second opening. An air intake channel corresponding to the second opening is penetrated by the slider, and a ventilation channel is arranged around a portion of the outer shell where the adjustment channel is not inserted. The movable ball and the slider slide in the direction of the airflow. When the airflow is injected from the second opening, the slider moves to block the ventilation channel; when the airflow is injected from the first opening, the slider leaves the ventilation channel to allow the gas to flow out of the ventilation channel.

[0007] Furthermore, the diameter of the air inlet passage is smaller than the diameter of the second opening.

[0008] Furthermore, an annular protrusion is provided on one side of the slider close to the second opening, a limiting groove capable of accommodating the annular protrusion is provided on the inner ring of the shell, and a plurality of guide grooves corresponding to the ventilation channel are provided on one side of the slider close to the first opening.

[0009] Furthermore, a ventilation hole is arranged on the side wall of the portion of the shell inserted into the adjustment channel, and the ventilation hole extends to communicate with the first opening.

[0010] Furthermore, the measuring device also includes a reflection component, which is arranged on the side wall outside the shell away from the laser generator. The reflection component includes a movable track, a bracket and a reflector. The two movable tracks are respectively arranged on the left and right sides of the other end of the laser channel. The two brackets are respectively slidably connected to the two movable tracks, and the reflector is hinged to the bracket.

[0011] Furthermore, a plurality of heat dissipation holes are provided on the side wall of the shell, wherein the heat dissipation hole on the side of the laser generator is connected to a fan.

[0012] Furthermore, a heat exchanger is provided between the adjustment channel and the gas cylinder, and the gas temperature is adjusted by the heat exchanger.

[0013] By adopting the above technical solution, the beneficial effects of the present invention are: 1. The present invention sets a laser channel to connect the laser generator, so that the laser beam just emitted is transmitted through the laser channel. The laser channel effectively prevents the laser beam from contacting the surrounding environment of the laser generator, and avoids the influence of the temperature difference of the surrounding environment caused by the heating of the laser generator on the directivity of the laser beam, thereby greatly improving the stability of the laser pointing. An adjustment channel is vertically set in the laser channel, and airflows of different temperatures or flow rates are introduced in the vertical direction of the laser beam to create a gas turbulence phenomenon to adjust the laser beam deviation. A convex lens is set at the intersection to prevent the airflow in the adjustment channel from pouring into the laser channel, and the laser beam is repeatedly focused, adjusted, and focused, thereby greatly reducing the occurrence of laser dispersion.

[0014] 2. The present invention utilizes the control valve of the external gas cylinder to control the opening and closing conditions and gas flow rate of the gas cylinders on both sides of the adjustment channel. Because the gas cylinders on different sides need to be opened according to the offset direction of the laser beam, in order to realize the arbitrary switching of the gas flow direction on the adjustment channel, an airflow control component is arranged between the gas cylinder and the adjustment channel. The airflow control component can move following the flow direction of the airflow in the adjustment channel to realize the switching of the air intake function and the air outlet function and balance the air pressure in the adjustment channel; the slider is arranged to block and open the ventilation channel on the side wall of the outer shell, and the movable ball is arranged to block and open the air intake channel on the slider to prevent gas backflow. At the same time, because there is a gap between the movable ball and the outer shell, it can also play a role as a buffer gas.

[0015] 3. The present invention sets the diameter of the air inlet passage smaller than the diameter of the second opening to ensure that the wind can push the slider to slide and block the ventilation passage when it enters from the second opening; by setting an annular protrusion, a limit groove and a guide groove on the slider, the selection range of the slider volume is increased, the distance the slider needs to slide is shortened, and the switching speed is greatly improved. By setting a reflective component, the angle adjustment function of the laser measuring device is increased to avoid multiple leveling operations.

[0016] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

[0017] Undoubtedly, these and other objects of the present invention will become more apparent after the following detailed description of the preferred embodiment described with reference to various figures and drawings.

[0018] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, one or several preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation of the present invention.

[0020] In the drawings, the same reference numerals are used for the same components and the drawings are schematic and not necessarily drawn to scale.

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only one or several embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on such drawings without paying creative work.

[0022] Figure 1A top view of the internal structure of a laser measuring device with good pointing stability according to the present invention; Figure 2 A schematic diagram of the internal structure of a laser measuring device with good pointing stability according to the present invention; Figure 3 It is a schematic diagram of the overall structure of an airflow control component of a laser measurement device with good pointing stability according to the present invention; Figure 4 A cross-sectional view of the internal structure of the airflow control component of the present invention when airflow is poured in from the second opening; Figure 5 It is a cross-sectional view of the internal structure of the airflow control component of the present invention when airflow is poured into from the first opening.

[0023] Explanation of the main figure marks: 1-shell; 11-heat dissipation hole; 2-laser generator; 3-laser channel; 4-adjustment channel; 5-convex lens; 6-airflow control assembly; 61-housing; 611-first opening; 612-second opening; 613-ventilation channel; 614-limiting groove; 615-ventilation hole; 62-slider; 621-inlet channel; 622-annular protrusion; 623-guide groove; 63-movable ball; 7-reflection assembly; 71-movable track; 72-bracket; 73-reflector; 8-heat exchanger; 9-gas cylinder. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but are not used to limit the present invention.

[0025] Reference Figure 1-5 The present invention provides a technical solution: a laser measuring device with good pointing stability. The device includes a housing 1, a laser generator 2, a laser channel 3, an adjustment channel 4 and a reflection component 7.

[0026] The laser generator 2 is arranged in the housing 1, and a plurality of heat dissipation holes 11 are arranged on the side wall of the housing 1, wherein the heat dissipation holes 11 on one side of the laser generator 2 are connected to the fan, and the shape of the holes can be any one or two of rectangular and circular shapes. The laser generator 2 is an existing laser emitting device, and dispersion compensation technology and nonlinear devices can also be used. A three-fold laser beam expander is designed using a full polarization-maintaining fiber laser structure to achieve stable laser output, and a folded optical path based on a Paul prism is introduced in the compressor to improve the beam pointing stability of the laser system during emission.

[0027] The laser channel 3 is used for connecting one end of the laser generator 2 to the light outlet of the laser generator 2 just after the laser beam is emitted from the laser generating device. The connection between the two can be any of threaded connection, adhesion, etc. The adjustment channel 4 passes through the laser channel 3 vertically, and both ends of the adjustment channel 4 are connected to the external gas cylinder 9 and a heat exchanger 8 is provided between the two. Because the adjustment angle of turbulent gas is limited, there can be several adjustment channels 4 to perform segmented adjustment for the laser. In order to reduce the volume of the equipment, several adjustment channels 4 can be connected to the same gas cylinder 9, as long as an adjustable valve is provided on the pipeline of a single adjustment channel 4, but it should be noted that a separate heat exchanger 8 needs to be provided between a single adjustment channel 4 and the gas cylinder 9 to facilitate the separate adjustment of the gas temperature in different adjustment channels 4. It is necessary to explain that in order to reduce the impact of the vibration of the fan, heat exchanger 8 and gas cylinder 9 on the overall device, the three are fixed separately. The adjustment channel 4 is provided with a convex lens 5 at the junction with the laser channel 3. The convex lens 5 enables the laser beam to pass through the adjustment channel 4. The convex lens 5 allows the airflow and the laser to intersect in the adjustment channel 4. The laser beam is offset and adjusted by controlling the temperature or speed of the airflow flowing in the adjustment channel 4.

[0028] The airflow control component 6 connects the adjustment channel 4 with the external gas cylinder 9. Since both ends of the adjustment channel 4 are connected to the gas cylinders 9, the airflow control component 6 is provided so that the air intake function and the air outlet function at the same end of the adjustment channel 4 can be switched following the airflow direction.

[0029] The structure of the airflow control assembly 6 is specifically as follows: it includes a housing 61, a slider 62 and a movable ball 63. A first opening 611 is provided at one end of the housing 61, and a second opening 612 is provided at the other end of the housing 61. One end of the housing 61 can be movably inserted into the adjustment channel 4 and is detachably connected to the adjustment channel 4. The movable ball 63 is arranged in the housing 61, and the slider 62 is arranged between the movable ball 63 and the second opening 612. An air intake channel 621 corresponding to the second opening 612 is penetrated through the slider 62. A ventilation channel 613 is arranged around the portion of the housing 61 not inserted into the adjustment channel 4. The movable ball 63 and the slider 62 slide along the direction of the airflow. When the airflow is poured in from the second opening 612, the slider 62 moves to block the ventilation channel 613; when the airflow is poured in from the first opening 611, the slider 62 leaves the ventilation channel 613 to allow the gas to flow out of the ventilation channel 613. In order to ensure that the slider 62 can be pushed by the airflow, the diameter of the air intake channel 621 is smaller than the diameter of the second opening 612. In order to increase the volume of the slider 62 and reduce the sliding length of the slider 62, the structure of the slider 62 is set, so that the side of the slider 62 close to the second opening 612 is provided with an annular protrusion 622, and the inner ring of the shell 61 is provided with a limiting groove 614 that can accommodate the annular protrusion 622, and the limiting groove 614 limits the sliding distance of the annular protrusion 622. The side of the slider 62 close to the first opening 611 is provided with a plurality of guide grooves 623 corresponding to the ventilation channel 613, and the side wall of the shell 61 inserted into the adjustment channel 4 is provided with a ventilation hole 615, and the ventilation hole 615 extends to communicate with the first opening 611. The guide groove 623 and the ventilation hole 615 echo each other, guide the gas entering the first opening 611, and promote the sliding of the slider 62.

[0030] The reflective assembly 7 is arranged on the side wall outside the housing 1 away from the laser generator 2, and the reflective assembly 7 includes a movable track 71, a bracket 72 and a reflector 73. The two movable tracks 71 are respectively arranged on the left and right sides of the other end of the laser channel 3, and the two brackets 72 are respectively slidably connected to the two movable tracks 71, and can be fixed after sliding to the target position. The reflector 73 is hinged to the bracket 72, and is preferably a double-sided reflector.

[0031] Working principle: The laser generator emits a laser beam which enters the laser channel and reaches the point to be measured. The deflection of the laser beam is adjusted according to the receiver data at the point to be measured. The gas cylinder and heat exchanger on the corresponding side are opened according to the direction to be adjusted. A flowing airflow with temperature or a certain flow rate is blown into the adjustment channel to fine-tune the laser beam. This method can adapt to the adjustment of laser pointing stability in different temperature environments.

[0032] It should be understood that the embodiments disclosed in the present invention are not limited to the specific processing steps or materials disclosed herein, but should be extended to equivalent substitutions of such features understood by ordinary technicians in the relevant field. It should also be understood that the terms used herein are only used for the purpose of describing specific embodiments and are not meant to be limiting.

[0033] The "embodiment" mentioned in the specification means that the specific features or characteristics described in conjunction with the embodiment are included in at least one embodiment of the present invention. Therefore, the phrases or "embodiment" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0034] In addition, the described features or characteristics may be combined in one or more embodiments in any other suitable manner. In the above description, some specific details, such as thickness, quantity, etc., are provided to provide a comprehensive understanding of the embodiments of the present invention. However, those skilled in the relevant art will understand that the present invention can be implemented without one or more of the above specific details or can also be implemented using other methods, components, materials, etc.

Claims

1. A laser measuring device with good pointing stability, characterized in that: The invention comprises a shell, a laser generator, a laser channel and an adjustment channel. The laser generator is arranged in the shell. One end of the laser channel is connected to the light outlet of the laser generator. The adjustment channel vertically passes through the laser channel. Both ends of the adjustment channel are connected to external gas cylinders. A convex lens is arranged at the junction of the adjustment channel and the laser channel. The convex lens enables the laser beam to pass through the adjustment channel, and the temperature or speed of the airflow in the adjustment channel is controlled to adjust the offset of the laser beam.

2. The laser measuring device with good pointing stability according to claim 1, characterized in that: It also includes an airflow control component, which connects the adjustment channel and an external gas cylinder to achieve switching between the air intake function and the air outlet function at the same end of the adjustment channel.

3. The laser measuring device with good pointing stability according to claim 2, characterized in that: The airflow control component includes a shell, a slider and a movable ball. A first opening is provided at one end of the shell, and a second opening is provided at the other end of the shell. One end of the shell can be movably inserted into the adjustment channel. The movable ball is arranged in the shell, and the slider is arranged between the movable ball and the second opening. An air intake channel corresponding to the second opening is penetrated through the slider, and a ventilation channel is arranged around the portion of the shell where the adjustment channel is not inserted. The movable ball and the slider slide in the direction of the airflow. When the airflow is poured in from the second opening, the slider moves to block the ventilation channel; when the airflow is poured in from the first opening, the slider leaves the ventilation channel to allow the gas to flow out of the ventilation channel.

4. The laser measuring device with good pointing stability according to claim 3, characterized in that: The diameter of the air inlet passage is smaller than the diameter of the second opening.

5. The laser measuring device with good pointing stability according to claim 3, characterized in that: A ring-shaped protrusion is arranged on one side of the slider close to the second opening, a limiting groove capable of accommodating the ring-shaped protrusion is arranged on the inner ring of the shell, and a plurality of guide grooves corresponding to the ventilation channel are arranged on one side of the slider close to the first opening.

6. The laser measuring device with good pointing stability according to claim 5, characterized in that: A ventilation hole is arranged on the side wall of the portion of the shell that is inserted into the adjustment channel, and the ventilation hole extends to communicate with the first opening.

7. The laser measuring device with good pointing stability according to claim 1, characterized in that: It also includes a reflection component, which is arranged on the side wall outside the shell away from the laser generator. The reflection component includes a movable track, a bracket and a reflector. The two movable tracks are respectively arranged on the left and right sides of the other end of the laser channel. The two brackets are respectively slidably connected to the two movable tracks, and the reflector is hinged to the bracket.

8. The laser measuring device with good pointing stability according to claim 1, characterized in that: A plurality of heat dissipation holes are arranged on the side wall of the shell, wherein the heat dissipation hole on one side of the laser generator is connected to the fan.

9. The laser measuring device with good pointing stability according to claim 1, characterized in that: A heat exchanger is provided between the adjustment channel and the gas cylinder, and the gas temperature is adjusted by the heat exchanger.

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