Laser rangefinder temperature drift elimination method and laser rangefinder

Abstract

The present invention belongs to the technical field of laser rangefinders, and specifically, is a method for eliminating temperature drift of laser rangefinders and a laser rangefinder, comprising a laser rangefinder body, a pair of first slide grooves are provided on the side wall of the laser rangefinder body, a slide rod is slidably connected in the first slide groove, a connecting rod is rotatably connected in the middle of the slide rod, a protective cover is rotatably connected in the middle of the connecting rod, a first magnetic sheet is fixedly connected to the side wall of the protective cover, and a second magnetic sheet is fixedly connected to the side wall of the laser rangefinder body. Through the above structure, there is no need to determine the compensation value, only the value needs to be subtracted, and the data can be processed relatively simply, so that the actual measured distance can be determined relatively conveniently; the slide rod, the connecting rod and the protective cover are set, and the first magnetic sheet and the second magnetic sheet are used in conjunction, and the emitting end of the laser rangefinder body can be covered after use to reduce the contact between the lens component and the outside, and the friction caused by scratches affects the measurement effect.

Description

Technical Field

[0001] The invention belongs to the technical field of laser rangefinders, in particular to a method for eliminating temperature drift of laser rangefinders and a laser rangefinder. Background Art

[0002] A laser rangefinder is an instrument that uses laser technology to measure distance. It calculates the distance to the target object by emitting a laser beam and measuring the time it takes for the laser beam to be reflected back. Laser rangefinders are widely used in construction, engineering, surveying and mapping, military, scientific research and other fields due to their high precision, fast response and easy operation.

[0003] The laser rangefinder is based on the fact that the propagation speed of light is constant. By emitting light, when it encounters the target object to be measured, the target object will reflect the light, and then it will be received by the receiver in the laser rangefinder. The measured distance can be obtained by the time difference between emission and reception and the speed of light. Temperature changes will affect the related components in the laser rangefinder, making the distance measurement inaccurate. The existing solutions generally obtain the temperature and then determine the compensation value through an algorithm. This setting has high requirements for the compensation value determined by the algorithm, and also requires real-time temperature detection and data processing.

[0004] To this end, the present invention provides a method for eliminating temperature drift of laser ranging and a laser ranging instrument. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art and solve at least one of the problems mentioned in the background technology, a method for eliminating temperature drift of laser ranging and a laser rangefinder are proposed.

[0006] The technical solution adopted by the present invention to solve the technical problem is: the laser ranging temperature drift elimination method of the present invention, the specific steps of the method are as follows:

[0007] S1: A semi-reflective and semi-mirror lens is set in the laser rangefinder;

[0008] S2: Use the transmitting end of the laser rangefinder to emit laser. Based on a laser pulse signal, the laser reflected by the half-reflecting half-mirror can obtain distance information once, and the laser reflected from the outside can obtain distance information once. Since the distance between the receiving end of the laser rangefinder and the half-reflecting half-mirror is known, the distance caused by temperature drift can be obtained;

[0009] S3: Then revise the actual distance, S temperature drift = S internal measurement - S internal actual, S external measurement - S temperature drift = S external actual;

[0010] S4: The actual internal distance can be measured during equipment production, or it can be determined by calibration at standard temperature after production. S measured value = S actual external value + S actual internal value. S actual external value can be determined by external measurement to obtain the actual internal value.

[0011] A laser rangefinder, the device is applicable to any of the above-mentioned methods for eliminating temperature drift of a laser rangefinder, comprising a laser rangefinder body, a pair of first slide grooves being provided on the side wall of the laser rangefinder body, a slide rod being slidably connected in the first slide groove, a connecting rod being rotatably connected in the middle of the slide rod, a protective cover being rotatably connected in the middle of the connecting rod, a first magnetic sheet being fixedly connected to the side wall of the protective cover, and a second magnetic sheet being fixedly connected to the side wall of the laser rangefinder body. Through the above-mentioned structure, the slide rod, the connecting rod and the protective cover are arranged, and the first magnetic sheet and the second magnetic sheet are used in combination. After use, the emitting end of the laser rangefinder body can be covered to reduce the contact between the lens component and the outside, thereby reducing the friction that causes scratches and affects the measurement effect.

[0012] Preferably, a fixing box is fixedly connected to the side wall of the protective cover, a plurality of air holes are provided in the middle of the fixing box, a heat dissipation fan is fixedly connected to the inner wall of the fixing box, a vent is provided on the side wall of the protective cover, a power module is installed on the inner wall of the fixing box, a control module is installed on the inner wall of the fixing box, the power module is electrically connected to the control module and the heat dissipation fan, and through the above structure, a heat dissipation fan is provided in conjunction with the air holes and the vent, so that the transmitting end of the laser rangefinder body can be blown to cool down, so as to reduce the large amount of heat generated after the transmitting end is running, which is difficult to dissipate in a small space, resulting in aging and damage.

[0013] Preferably, a first hook is fixedly connected to the side wall of the protective cover, a second slide groove is provided on the side wall of the laser rangefinder body, a push plate is slidably connected in the second slide groove, a spring body is fixedly connected to the inner side wall of the second slide groove, an end of the spring body is fixedly connected to the push plate, and a second hook is fixedly connected to the bottom of the push plate. Through the above structure, the first hook, the push plate, the spring body and the second hook are arranged, and the protective cover can be fixed when the protective cover covers the laser rangefinder body to improve the stability of the position of the protective cover and reduce the situation where the protective cover slides off from the end of the laser rangefinder body during the overall movement.

[0014] Preferably, a plurality of damping springs are fixedly connected to one end of the laser rangefinder body away from the protective cover, and a pad is commonly fixedly connected to the ends of the plurality of damping springs. Through the above structure, the damping springs and the pad are arranged to reduce the impact force generated between the laser rangefinder body and the wall or the ground, so as to reduce the situation in which the components become loose due to vibration caused by the impact.

[0015] Preferably, a vertical groove and a horizontal groove are provided on the side wall of the laser rangefinder body, and a level is placed in each of the vertical groove and the horizontal groove. A pair of spring sheets are fixedly connected to the inner side walls of the vertical groove and the horizontal groove. Through the above structure, the vertical groove, the horizontal groove, the level, and the spring sheet are provided, and two vertical and horizontal levels can be used to observe the horizontality of the laser rangefinder body during use. At the same time, the spring sheet can facilitate the replacement of the level, thereby improving convenience during use.

[0016] Preferably, a filter is provided on the side wall of the fixed box, and the filter is detachably installed. Through the above structure, the filter can filter the airflow entering the protective cover to reduce dust and impurities from entering the emitting end of the laser rangefinder body, causing them to adhere to its surface and affect the measurement.

[0017] Preferably, a plurality of silicone pads are fixedly connected to the side wall of the laser rangefinder body, and the silicone pads are arranged at the edge of the laser rangefinder body. Through the above structure, the silicone pads can reduce the damage caused by friction between the laser rangefinder body and the measuring surface, and at the same time can increase the friction between the user and the laser rangefinder body to reduce the situation of slipping and falling during use.

[0018] Preferably, the pad is made of rubber material. Through the above structure, the pad is made of rubber material, and a certain buffering effect can be achieved through its flexible material. In combination with the damping spring, the overall buffering and vibration reduction effect can be improved.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. The laser rangefinder temperature drift elimination method and the laser rangefinder of the present invention, by setting a sliding rod, a connecting rod and a protective cover, and using a first magnetic sheet and a second magnetic sheet in combination, can cover the transmitting end of the laser rangefinder body after use to reduce the contact between the lens components and the outside, thereby reducing the friction that causes scratches and affects the measurement effect.

[0021] 2. The laser rangefinder temperature drift elimination method and the laser rangefinder of the present invention can cool down the transmitting end of the laser rangefinder body by blowing air through a heat dissipation fan in combination with air holes and vents, so as to reduce the large amount of heat generated after the transmitting end is in operation, which is difficult to dissipate in a small space and leads to aging and damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] Figure 1 It is a method flow chart of the method for eliminating temperature drift of laser ranging in the present invention;

[0024] Figure 2 is a stereogram of the laser rangefinder of the present invention;

[0025] Figure 3 It is a schematic diagram of the structure of the protective cover in the present invention;

[0026] Figure 4 It is a structural schematic diagram of the heat dissipation fan in the present invention;

[0027] Figure 5 It is a structural schematic diagram of the level instrument in the present invention;

[0028] Figure 6 yes Figure 2 A partial enlarged view of the middle part;

[0029] Figure 7 It is a schematic diagram of the adsorption and matching structure of the protective cover and the laser rangefinder body in the present invention.

[0030] Legend:

[0031] 1. Laser rangefinder body; 11. First slide slot; 12. Slide bar; 13. Connecting rod; 14. Protective cover; 15. First magnetic sheet; 16. Second magnetic sheet; 2. Fixing box; 21. Air vent; 22. Vent; 23. Cooling fan; 24. Power module; 25. Control module; 3. First hook; 31. Second slide slot; 32. Push plate; 33. Spring body; 34. Second hook; 4. Damping spring; 41. Pad; 5. Vertical slot; 51. Horizontal slot; 52. Level; 53. Spring sheet; 6. Filter; 7. Silicone pad. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Specific examples are given below.

[0034] like Figure 1 As shown, the laser ranging temperature drift elimination method of the embodiment of the present invention has the following steps:

[0035] S1: A semi-reflective and semi-mirror lens is set in the laser rangefinder;

[0036] S2: Use the transmitting end of the laser rangefinder to emit laser. Based on a laser pulse signal, the laser reflected by the half-reflecting half-mirror can obtain distance information once, and the laser reflected from the outside can obtain distance information once. Since the distance between the receiving end of the laser rangefinder and the half-reflecting half-mirror is known, the distance caused by temperature drift can be obtained;

[0037] S3: Then revise the actual distance, S temperature drift = S internal measurement - S internal actual, S external measurement - S temperature drift = S external actual;

[0038] S4: The actual internal distance can be measured during equipment production, or it can be determined by calibration at standard temperature after production. S measured value = S actual external value + S actual internal value. S actual external value can be determined by external measurement to obtain the actual internal value.

[0039] It should be noted that, with this method, there is no need to determine the compensation value, only the value needs to be subtracted, and the data can be processed relatively simply, thereby determining the actual measurement distance relatively conveniently.

[0040] like Figures 2 to 3 and Figure 7 As shown, a laser rangefinder is applicable to the above-mentioned method for eliminating temperature drift of an optical rangefinder, comprising a laser rangefinder body 1, a pair of first slide grooves 11 are provided on the side wall of the laser rangefinder body 1, a slide rod 12 is slidably connected in the first slide groove 11, a connecting rod 13 is rotatably connected in the middle of the slide rod 12, a protective cover 14 is rotatably connected in the middle of the connecting rod 13, a first magnetic sheet 15 is fixedly connected to the side wall of the protective cover 14, and a second magnetic sheet 16 is fixedly connected to the side wall of the laser rangefinder body 1. During operation, when the laser rangefinder body 1 is in use, if the lens part is worn or collided, scratches or damage will be generated on its surface, which will affect the calculation of the actual distance, and will affect the accuracy of the temperature drift elimination distance calculation. When using the laser rangefinder body 1, pull the protective cover 14 away from the laser rangefinder body 1, and then flip the protective cover 14 so that the first magnetic sheet 15 on its side is aligned with the laser rangefinder body 1. The second magnetic sheet 16 on the side of the optical rangefinder body 1 is adsorbed together, and the protective cover 14 is fixed to the back of the laser rangefinder body 1 at this time, and then the laser rangefinder body 1 is used for measurement. After the measurement, the protective cover 14 is pulled away from the back of the laser rangefinder body 1, and then the protective cover 14 is flipped again to align with the end of the laser rangefinder body 1, and then the protective cover 14 is pushed back to cover the end position of the laser rangefinder body 1. At this time, the emitting end of the end of the laser rangefinder body 1 can be covered, so as to cover the lens component of the emitting end. Through the above structure, the sliding rod 12, the connecting rod 13 and the protective cover 14 are set, and the first magnetic sheet 15 and the second magnetic sheet 16 are used in combination. After use, the emitting end of the laser rangefinder body 1 can be covered to reduce the contact between the lens component and the outside, and the friction caused by scratches affects the measurement effect.

[0041] like Figure 2 and Figure 3As shown, the side wall of the protective cover 14 is fixedly connected to a fixing box 2, a plurality of air holes 21 are provided in the middle of the fixing box 2, a heat dissipation fan 23 is fixedly connected to the inner wall of the fixing box 2, a vent 22 is provided on the side wall of the protective cover 14, a power module 24 is installed on the inner wall of the fixing box 2, a control module 25 is installed on the inner wall of the fixing box 2, the power module 24 is electrically connected to the control module 25 and the heat dissipation fan 23, when working, after the protective cover 14 covers the laser rangefinder body 1 at the end of use, residual heat will be stored at the laser emission end, at this time, the heat dissipation fan 23 can be turned on by the control module 25, and at this time, the heat dissipation fan 23 will drive the airflow from the air vent The air enters through the hole 21, and then blows into the protective cover 14 from the vent 22. At this time, the emitting end of the laser rangefinder body 1 can be blown to cool it down, and then the airflow flows out through the gap between the protective cover 14 and the laser rangefinder body 1. When the temperature of the emitting end drops, the heat dissipation fan 23 is controlled to be closed through the control module 25. Through the above structure, the heat dissipation fan 23 is arranged to cooperate with the air vent 21 and the vent 22, and the emitting end of the laser rangefinder body 1 can be blown to cool it down, so as to reduce the large amount of heat generated after the emitting end is running, which is difficult to dissipate in a small space, resulting in aging and damage.

[0042] like Figure 2 and Figure 6 As shown, the side wall of the protective cover 14 is fixedly connected with the first hook 3, the side wall of the laser rangefinder body 1 is provided with a second slide groove 31, the second slide groove 31 is slidably connected with a push plate 32, the inner side wall of the second slide groove 31 is fixedly connected with a spring body 33, the end of the spring body 33 is fixedly connected to the push plate 32, and the bottom of the push plate 32 is fixedly connected with a second hook 34. When working, when the protective cover 14 is covered on the end of the laser rangefinder body 1, the push plate 32 can be pushed to move toward the top of the laser rangefinder body 1, and the protective cover 14 can be pushed to drive the first hook 3 to move. When the first hook 3 exceeds the position of the second hook 34, , release the push plate 32. At this time, the push plate 32 will drive the push plate 32 and the second hook 34 to move downward under the action of the spring body 33 rebounding, so that the second hook 34 clamps the first hook 3 and fixes the position of the protective cover 14. Through the above structure, the first hook 3 and the push plate 32 and the spring body 33 and the second hook 34 are set, and the protective cover 14 can be fixed when the protective cover 14 covers the laser rangefinder body 1, so as to improve the stability of the position of the protective cover 14, so as to reduce the situation that the protective cover 14 slides off from the end of the laser rangefinder body 1 during the overall movement.

[0043] like Figure 3As shown, a plurality of damping springs 4 are fixedly connected to one end of the laser rangefinder body 1 away from the protective cover 14, and a pad 41 is fixedly connected to the ends of the plurality of damping springs 4. During operation, when the bottom of the laser rangefinder body 1 contacts the wall or the ground when the laser rangefinder body 1 is used, the pad 41 contacts the wall or the ground first, and then the damping spring 4 contracts to buffer and reduce vibration, and makes the pad 41 level with the bottom of the laser rangefinder body 1. When the laser rangefinder body 1 is away from the wall or the ground, the damping spring 4 rebounds to drive the pad 41 to reset. Through the above structure, the damping spring 4 and the pad 41 are arranged, so as to reduce the impact force between the laser rangefinder body 1 and the wall or the ground, so as to reduce the loosening of components caused by vibration caused by the impact.

[0044] like Figure 5 As shown, a vertical groove 5 and a horizontal groove 51 are provided on the side wall of the laser rangefinder body 1, and a level 52 is placed in each of the vertical groove 5 and the horizontal groove 51. A pair of spring sheets 53 are fixedly connected to the inner side walls of the vertical groove 5 and the horizontal groove 51. When working, the level 52 is respectively installed in the vertical groove 5 and the horizontal groove 51. At this time, the spring sheet 53 will clamp the level 52 in the vertical groove 5 and the horizontal groove 51. When used in the vertical direction or the horizontal direction, the horizontality of the laser rangefinder body 1 can be judged by observing the level 52. In actual use, the level 52 will be worn, making it difficult to observe the horizontality. At this time, the level 52 can be taken out and replaced with a new level 52, and the level 52 can be clamped by the spring sheet 53. Through the above structure, the vertical groove 5, the horizontal groove 51, the level 52, and the spring sheet 53 are set, and the two vertical and horizontal levels 52 can be used to observe the horizontality of the laser rangefinder body 1 when in use. At the same time, the spring sheet 53 can facilitate the replacement of the level 52, thereby improving the convenience during use.

[0045] like Figure 2 As shown, a filter screen 6 is provided on the side wall of the fixed box 2, and the filter screen 6 is detachably installed. When working, when the airflow enters the protective cover 14, it will first pass through the filter screen 6. At this time, the filter screen 6 will filter the passing airflow and filter out the dust and impurities in the airflow. When there is a lot of dust adhering to the filter screen 6, the dust can be cleaned by removing the filter screen 6, and then the filter screen 6 can be installed and reset. Through the above structure, the filter screen 6 can be set to filter the airflow entering the protective cover 14 to reduce the dust and impurities from entering the emitting end of the laser rangefinder body 1, causing it to adhere to its surface and affect the measurement.

[0046] like Figure 3As shown, a plurality of silicone pads 7 are fixedly connected to the side wall of the laser rangefinder body 1, and the silicone pads 7 are arranged at the edge of the laser rangefinder body 1. During operation, when the laser rangefinder body 1 is used to contact the measuring surface, the silicone pads 7 are located at the edge of the laser rangefinder body 1, and the surface of the silicone pads 7 is higher than the laser rangefinder body 1, then the silicone pads 7 will contact the measuring surface, and the user will also contact the silicone pads 7 when holding the laser rangefinder body 1. Through the above structure, the silicone pads 7 can reduce the damage caused by the friction between the laser rangefinder body 1 and the measuring surface, and at the same time can increase the friction between the user and the laser rangefinder body 1, so as to reduce the situation of slipping and falling during use.

[0047] like Figure 3 As shown, the pad 41 is made of rubber material. Through the above structure, the pad 41 is set to be made of rubber material. Its flexible material can achieve a certain buffering effect, and the damping spring 4 can be used to improve the overall buffering and vibration reduction effect.

[0048] Working principle: When the laser rangefinder body 1 is in use, if the lens part is worn or collided, scratches or damage will occur on its surface, which will affect the calculation of the actual distance, and will affect the accuracy of the temperature drift elimination distance calculation. When using the laser rangefinder body 1, pull the protective cover 14 away from the laser rangefinder body 1, and then flip the protective cover 14 so that the first magnetic piece 15 on its side is adsorbed with the second magnetic piece 16 on the side of the laser rangefinder body 1. At this time, the protective cover 14 will be fixed to the back of the laser rangefinder body 1, and then the laser rangefinder body 1 will be used for measurement. After the measurement is completed, pull the protective cover 14 away from the back of the laser rangefinder body 1, and then flip the protective cover 14 and the laser rangefinder body 1 again. The ends are aligned, and then the protective cover 14 is pushed back to cover the end position of the laser rangefinder body 1. At this time, the emitting end of the end of the laser rangefinder body 1 can be covered, so as to cover the lens component of the emitting end. After the protective cover 14 covers the laser rangefinder body 1 after use, there will be residual heat in the laser emitting end. At this time, the cooling fan 23 can be turned on by the control module 25. At this time, the cooling fan 23 will drive the air flow to enter from the air vent 21, and then blow into the protective cover 14 from the vent 22. At this time, the emitting end of the laser rangefinder body 1 can be blown to cool it down, and then the air flow flows out through the gap between the protective cover 14 and the laser rangefinder body 1. When the temperature of the emitting end drops, the cooling fan 23 is controlled to be closed by the control module 25. When the protective cover 14 is covered on the end of the laser rangefinder body 1, the push plate 32 can be pushed to move toward the top of the laser rangefinder body 1, and the protective cover 14 can be pushed to drive the first hook 3 to move. When the first hook 3 exceeds the position of the second hook 34, the push plate 32 is released. At this time, the push plate 32 will drive the push plate 32 and the second hook 34 to move downward under the action of the rebound of the spring body 33, so that the second hook 34 clamps the first hook 3 and fixes the position of the protective cover 14. When the bottom of the laser rangefinder body 1 contacts the wall or the ground when the laser rangefinder body 1 is in use, the pad 41 will contact the wall or the ground first, and then the damping spring 4 will shrink for buffering and vibration reduction, and make the pad 41 level with the bottom of the laser rangefinder body 1. When the rangefinder body 1 is away from the wall or the ground, the damping spring 4 will rebound and drive the pad 41 to reset, and the level 52 will be installed in the vertical groove 5 and the horizontal groove 51 respectively. At this time, the spring sheet 53 will clamp the level 52 in the vertical groove 5 and the horizontal groove 51. When used in the vertical direction or the horizontal direction, the horizontality of the laser rangefinder body 1 can be judged by observing the level 52. In actual use, the level 52 will be worn, making it difficult to observe the horizontality. At this time, the level 52 can be taken out and replaced with a new level 52, and the level 52 can be clamped by the spring sheet 53. When the airflow enters the protective cover 14, it will first pass through the filter 6. At this time, the filter 6 will filter the passing airflow and filter out dust and impurities in the airflow. When more dust adheres to the filter 6,The filter 6 can be removed to clean the dust, and then the filter 6 can be installed and reset. When the laser rangefinder body 1 is in contact with the measuring surface, the silicone pad 7 is located at the edge of the laser rangefinder body 1, and the surface of the silicone pad 7 is higher than the laser rangefinder body 1. Then the silicone pad 7 will contact the measuring surface, and the user will also contact the silicone pad 7 when holding the laser rangefinder body 1.

[0049] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for eliminating temperature drift of laser ranging, characterized in that: The steps of the laser rangefinder temperature drift elimination method are as follows: S1: a semi-reflective and semi-mirror is set in the laser rangefinder; S2: a laser is emitted from the transmitting end of the laser rangefinder, and based on a laser pulse signal, distance information can be obtained once by the laser reflected by the semi-reflective and semi-mirror, and distance information can be obtained once by the laser reflected externally. Since the distance between the receiving end of the laser rangefinder and the semi-reflective and semi-mirror is known, the distance caused by the temperature drift can be obtained; S3: then the actual distance is revised, S temperature drift = S internal measurement - S internal actual, S external measurement - S temperature drift = S external actual; S4: the internal actual distance can be measured during the production of the equipment, or can be determined by calibration at a standard temperature after the production is completed, S measurement value = S external actual + S internal actual, S external actual can be determined by external measurement, and the internal actual value can be obtained; The laser rangefinder comprises a laser rangefinder body (1), characterized in that: a pair of first slide grooves (11) are provided on the side wall of the laser rangefinder body (1), a slide rod (12) is slidably connected in the first slide groove (11), a connecting rod (13) is rotatably connected in the middle of the slide rod (12), a protective cover (14) is rotatably connected in the middle of the connecting rod (13), a first magnetic sheet (15) is fixedly connected to the side wall of the protective cover (14), and a second magnetic sheet (16) is fixedly connected to the side wall of the laser rangefinder body (1); The side wall of the protective cover (14) is fixedly connected to a fixing box (2), a plurality of air holes (21) are provided in the middle of the fixing box (2), a heat dissipation fan (23) is fixedly connected to the inner wall of the fixing box (2), a vent (22) is provided in the side wall of the protective cover (14), a power module (24) is installed on the inner wall of the fixing box (2), a control module (25) is installed on the inner wall of the fixing box (2), and the power module (24) is electrically connected to the control module (25) and the heat dissipation fan (23); The side wall of the protective cover (14) is fixedly connected to a first hook (3); the side wall of the laser rangefinder body (1) is provided with a second slide groove (31); a push plate (32) is slidably connected in the second slide groove (31); a spring body (33) is fixedly connected to the inner side wall of the second slide groove (31); an end of the spring body (33) is fixedly connected to the push plate (32); and a second hook (34) is fixedly connected to the bottom of the push plate (32).

2. The laser ranging temperature drift elimination method according to claim 1, characterized in that: A plurality of damping springs (4) are fixedly connected to one end of the laser rangefinder body (1) away from the protective cover (14), and a pad (41) is commonly fixedly connected to the ends of the plurality of damping springs (4).

3. The method for eliminating temperature drift of laser ranging according to claim 1, characterized in that: A vertical groove (5) and a horizontal groove (51) are provided on the side wall of the laser rangefinder body (1), a level (52) is placed in each of the vertical groove (5) and the horizontal groove (51), and a pair of spring sheets (53) are fixedly connected to the inner side walls of the vertical groove (5) and the horizontal groove (51).

4. The laser ranging temperature drift elimination method according to claim 1, characterized in that: A filter screen (6) is provided on the side wall of the fixing box (2), and the filter screen (6) is detachably mounted.

5. The method for eliminating temperature drift of laser ranging according to claim 1, characterized in that: A plurality of silicone pads (7) are fixedly connected to the side wall of the laser rangefinder body (1), and the silicone pads (7) are arranged at the edge of the laser rangefinder body (1).

6. The method for eliminating temperature drift of laser ranging according to claim 2, characterized in that: The pad (41) is made of rubber.

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