Defogging device for objective lens of total station

Abstract

The utility model belongs to the technical field of total stations, and particularly relates to a demisting device for an objective lens of a total station. Comprising a total station body, a demisting assembly is detachably connected to a sighting part of the total station body, the demisting assembly comprises a shell, an annular sleeve located on the front side of an objective lens of the total station body is arranged below the shell, the side wall of the annular sleeve is attached to a protective ring of the objective lens, and the interior of the annular sleeve is of a hollow structure; the annular sleeve is connected and communicated with the shell through a connecting channel, a heating net is installed in the shell, a blowing fan for blowing heat generated by the heating net to the annular sleeve is installed above the heating net, a plurality of inclined air guide holes are formed in the inner wall of the annular sleeve, and the air outlet ends of the air guide holes face the objective lens. According to the utility model, the objective lens can be continuously demisted, meanwhile, the total station body can be conveniently measured, the measurement interruption is avoided, and the measurement precision and continuity are ensured.

Description

Technical Field

[0001] This utility model belongs to the field of total station technology, and in particular relates to a defogging device for total station objective lenses. Background Technology

[0002] Total stations, as core equipment in modern engineering surveying, are widely used in fields such as architectural surveying, construction layout, and deformation monitoring. Their measurement accuracy directly affects project quality and construction efficiency. However, at construction sites, total stations often face complex environmental challenges, especially in situations with high humidity and large temperature differences, such as basements, rainy seasons, or winter. These conditions can easily cause fogging on the objective lens surface. Frost and fog can cause light scattering or refraction, leading to deviations in the data collected by the total station and affecting the clarity of observations and the accuracy of measurement data.

[0003] Currently, the objective lens is heated by an electric heating element to remove fog. The existing electric heating element is located on one side of the lens when defogging the objective lens and is removed after defogging is completed. However, it cannot continuously defog the objective lens. When the objective lens is continuously defogging, it is inconvenient to carry out measurements. The measurement personnel frequently interrupt the work to defog, which affects the construction progress. Utility Model Content

[0004] The purpose of this invention is to provide a defogging device for total station objectives, which facilitates measurement while continuously defogging the objective and avoids measurement interruption.

[0005] The aforementioned defogging device for the total station objective lens includes a total station body. A defogging assembly is detachably connected to the aiming section of the total station body. The defogging assembly includes a housing. An annular sleeve is located below the housing and positioned in front of the objective lens of the total station body. The sidewall of the annular sleeve fits against the protective ring of the objective lens. The annular sleeve has a hollow internal structure. The annular sleeve and the housing are connected and communicate with each other through a connecting channel. A heating grid is installed inside the housing. A blower fan is installed above the heating grid to blow the heat generated by the heating grid onto the annular sleeve. Several air guide holes are opened on the inner wall of the annular sleeve. The air guide holes are inclined and the air outlet of the air guide holes faces the objective lens.

[0006] Furthermore, the shell is hinged with a protective cover, an adsorption layer is provided inside the protective cover, a movable plate is provided on the adsorption layer, a through groove is provided on the protective cover, a push-pull plate connected to the movable plate is provided at the through groove, and several springs are provided between the movable plate and the top of the protective cover.

[0007] Furthermore, the top of the protective cover is provided with an annular groove, and an annular plate that slides within the groove is provided with it. Several telescopic rods that are inserted into springs are provided on the annular plate.

[0008] Furthermore, a fixing plate is provided inside the housing, and a storage battery is installed on the fixing plate.

[0009] Furthermore, a solar panel is provided on the surface of the casing.

[0010] Furthermore, the total station body has an embedded block on the aiming part, and a slot is provided at the bottom of the side wall of the housing for interlocking with it.

[0011] Furthermore, the adsorption layer is connected to the moving plate via a connector.

[0012] Furthermore, the adsorption layer includes a sponge layer, and a microfiber cloth is disposed on the outer side of the sponge layer.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This invention installs a defogging component at the objective lens. A blower fan directs the heat generated by the heating mesh into the connecting channel and then into the annular sleeve. The heat is then blown onto the objective lens through several inclined air vents, ensuring uniform heating. After the frost and fog condensed on the objective lens disappear, the objective lens remains stable, preventing the recurrence of frost and fog. This makes the measurement data of the total station more accurate. The invention can continuously defog the objective lens while facilitating measurements by the total station, avoiding measurement interruptions and ensuring measurement accuracy and continuity. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a perspective view of the present utility model;

[0017] Figure 3 This is a diagram showing the usage state of this utility model;

[0018] Figure 4 This is an exploded view of the present invention;

[0019] The components shown in the diagram are as follows: 1. Objective lens; 2. Annular sleeve; 3. Air vent; 4. Connecting channel; 5. Heating grid; 6. Blower fan; 7. Fixing plate; 8. Air inlet; 9. Embedded block; 10. Solar panel; 11. Battery; 12. Housing; 13. Protective cover; 14. Moving plate; 15. Push-pull plate; 16. Annular plate; 17. Telescopic rod; 18. Spring; 19. Adsorption layer; 20. Total station body. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0021] Example

[0022] This embodiment describes a defogging device for a total station objective lens, such as... Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the device includes a total station body 20. A defogging assembly is detachably connected to the aiming part of the total station body 20. The defogging assembly includes a housing 12. An annular sleeve 2 is located below the housing 12 in front of the objective lens 1 of the total station body 20. The side wall of the annular sleeve 2 fits against the protective ring of the objective lens 1. The annular sleeve 2 has a hollow structure inside. The annular sleeve 2 and the housing 12 are connected and communicate with each other through a connecting channel 4. A heating grid 5 is installed inside the housing 12. A blower fan 6 is installed above the heating grid 5 to blow the heat generated by the heating grid 5 towards the annular sleeve 2. Several air guide holes 3 are opened on the inner wall of the annular sleeve 2. The air guide holes 3 are inclined and the air outlet of the air guide holes 3 faces the objective lens 1.

[0023] The total station body 20 is existing technology. The total station body 20 includes an aiming section, which comprises a telescope (objective lens + eyepiece): used for aiming at the target, typically equipped with a focusing knob and crosshairs; a telescope mount: an optical assembly that rigidly fixes the objective lens and eyepiece; a horizontal axis (horizontal axis): the mechanical axis for telescope pitch rotation (vertical angle measurement); a vertical axis (vertical axis): the mechanical axis for horizontal rotation of the aiming section (horizontal angle measurement), achieving the measurement of horizontal angles (azimuth and elevation angles) through rotation; a coarse sight: assisting in quickly locating the target; and a base... Base: Connects to tripod, built-in optical / laser centering device; Distance measuring system: Infrared or laser distance measuring module; Angle measuring system: Horizontal circle: measures horizontal angles; Vertical circle: measures vertical angles; Control panel and display: Keyboard / touchscreen operation, displays measurement data; Prism and prism rod: reflects distance measuring signals; Tripod: Supports the instrument, must be stable and level; Battery: Lithium battery powered; Data storage device: SD card or Bluetooth transmission module; When using, unfold the tripod, ensure the tripod head is roughly horizontal and the height is suitable for the observer, step firmly on the tripod legs to prevent sinking; Installation complete... Stationary instrument: Secure the instrument to the tripod, tighten the center screw, adjust the tripod legs to center the bubble in the circular level, adjust the tube level with the leveling screws to ensure strict leveling, adjust the base through the eyepiece to align the measuring station point with the center, and aim the laser directly at the ground point; When measuring angles, loosen the leveling brake screw, roughly align the prism with the coarse sight, tighten the brake screw, and precisely align the crosshair center with the fine adjustment screw, recording the horizontal and vertical angle data displayed on the screen; When measuring distances: Select the distance measurement mode with or without prism, press the MEAS key, and the instrument will display the slope distance, horizontal distance, and height. Error; When measuring coordinates: input the coordinates of the measuring station (such as the coordinates of known control points), backsight orientation (input the coordinates or angle of the backsight point, aim at the target, and the instrument automatically calculates and stores the coordinates); When laying out: input the coordinates of the point to be laid out in the instrument, move the prism, and the screen displays the deviation value in real time until the deviation is 0; The measurement results are saved to the instrument memory or SD card and transferred to the computer via USB, Bluetooth, or WiFi; The structure and operating principle of the total station body 20 are existing technologies, and this embodiment does not improve them, but only adds a defogging component;

[0024] A defogging assembly is detachably connected to the aiming section of the total station body 20. The defogging assembly includes a housing 12, with a threaded sleeve at the bottom of the housing 12. A fixing tube is independently fitted onto the protective ring of the objective lens 1 on the aiming section of the total station body 20. The outer wall of the fixing tube has an external thread that is threaded to the threaded sleeve. In use, the threaded sleeve at the bottom of the housing 12 is threaded onto the fixing tube, and the housing 12 is fixed to the aiming section of the total station body 20. This facilitates the installation and removal of the defogging assembly. When the defogging assembly is damaged, it can be removed from the total station body 20 and replaced with a new one, making it more flexible to use.

[0025] Furthermore, the total station body 20 is provided with an embedded block 9 on the aiming part, and a slot for interlocking with it is opened at the bottom of the side wall of the housing 12; the embedded block 9 is attached to the aiming part of the total station body 20, and a slot for interlocking with the embedded block 9 is opened at the bottom of one side wall of the housing 12. The cross-section of the slot and the embedded block 9 is a "T" shaped structure to prevent the embedded block 9 from falling out of the slot, so that the embedded block 9 is inserted into the slot more securely, ensuring the installation of the housing 12 and the total station body 20, and also facilitating the disassembly of the housing 12. The defogging component is applicable to the total station body 20.

[0026] A hollow annular sleeve 2 is provided below the housing 12. A first fixing groove with internal and external communication is opened at the top of the annular sleeve 2, and a second fixing groove with internal and external communication is opened at the bottom of the housing 12. The top end of the connecting channel 4 is fixed at the second fixing groove, and its bottom end is fixed at the first fixing groove. The housing 12 and the annular sleeve 2 are connected and communicated through the connecting channel 4. An installation groove is opened on the inner wall of the housing 12. The heating mesh 5 is glued into the installation groove using thermally conductive double-sided adhesive and then fixed with ceramic screws. The wires electrically connected to the heating mesh 5 are made of high-temperature resistant silicone wire. A fixing plate 7 is provided inside the housing 12, and a storage battery 11 is installed on the fixing plate 7. The fixing plate 7 is welded or glued to the inner wall of the housing 12, and a blower fan 6 is installed on the fixing plate 7. The storage battery 11 that provides power to the heating mesh 5 and the blower fan 6 is installed on the fixing plate 7. The heating mesh 5 is located on the lower side. A temperature sensor is installed on the inner wall of the housing 12, and a PID controller electrically connected to the temperature sensor is installed on the outer wall of the housing 12. The PID controller is electrically connected to the heating grid 5, and the temperature sensor is electrically connected to the PID controller. The PID controller can detect the temperature generated by the heating grid 5 in real time and feed it back to the PID controller. The PID controller is electrically connected to the heating grid 5 and adjusts the heating power of the heating grid 5 according to the sensor data to control the heating and adjust the temperature. When the temperature is close to the set value, the heating power of the heating grid 5 is reduced. When the temperature reaches the set value, the heating grid 5 enters the maintenance mode. When the temperature exceeds the set value, the heating grid 5 is completely shut off to prevent overheating and to prevent the hot air blown out due to excessive temperature from damaging the objective lens 1. Several air inlets 8 are opened on the side wall of the housing 12, which are interconnected inside and outside. The air inlets 8 facilitate the entry of outside air into the housing 12 to realize airflow exchange.

[0027] The sidewall of the annular sleeve 2 fits against the outer wall of the protective ring at the objective lens 1. The inner sidewall of the annular sleeve 2 has several air guide holes 3 for blowing hot air onto the objective lens 1. The air guide holes 3 are inclined and the air outlets of the air guide holes 3 face the objective lens 1. The fan 6 blows the heat generated by the heating grid 5 into the connecting channel 4. The hot air is transferred to the annular sleeve 2 through the connecting channel 4 and then blown onto the objective lens 1 from the several inclined air guide holes 3. The hot air blows directly onto the objective lens 1 at an angle, forming a laminar flow air curtain, which quickly replaces the cold air on the surface of the objective lens 1 and shortens the defogging time. The several air guide holes 3 are evenly distributed in a ring to ensure that the edge and center of the objective lens 1 are heated synchronously, avoiding annular fogging caused by temperature difference. The hot air forms a micro-positive pressure air cushion on the surface of the objective lens 1, which isolates the external cold and humid air, maintains the temperature stability of the objective lens 1, and better performs defogging.

[0028] Furthermore, the inner wall of the annular sleeve 2 and the inner wall of the protective ring of the objective lens 1 are on the same plane. The coplanarity of the inner wall of the protective ring of the objective lens 1 and the inner wall of the annular sleeve 2 ensures that hot air flows parallel along the surface of the objective lens 1, avoiding eddies caused by height differences, making the surface temperature of the objective lens 1 uniform, and preventing local condensation. The hot air directly covers the entire objective lens 1, shortening the defogging time. The coplanarity of the inner wall of the protective ring of the objective lens 1 and the inner wall of the annular sleeve 2 ensures that the ranging laser / infrared light passes through the annular gap without obstruction, ensuring ranging accuracy. When using the objective lens 1 for measurement, hot air is continuously blown out from several air guide holes 3, ensuring the stability of the objective lens 1. After defogging the frost and fog on the objective lens 1, it ensures that the objective lens 1 does not produce frost and fog, and the measurement personnel will not interrupt the measurement, reducing the measurement time.

[0029] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the housing 12 is hinged to a protective cover 13. An adsorption layer 19 is provided inside the protective cover 13, and a movable plate 14 is provided on the adsorption layer 19. A through groove is provided on the protective cover 13, and a push-pull plate 15 connected to the movable plate 14 is provided at the through groove. Several springs 18 are provided between the movable plate 14 and the top of the protective cover 13. A hinge seat is welded or glued to the side wall of the housing 12. The hinge seat is hinged to the protective cover 13 via a damping pivot. When the total station body 20 is not in use, rotating the protective cover 13 causes it to rotate around the hinge point. The side wall of the protective cover 13 fits against the side wall of the annular sleeve 2, protecting the objective lens 1 and the annular sleeve 2 and preventing damage to the objective lens 1. A movable plate 14 is provided on the inner wall of the protective cover 13, and the adsorption layer 19 and the movable plate 14... The plate 14 is connected by connectors, which are two Velcro straps respectively attached to the movable plate 14 and the adsorption layer 19. These two Velcro straps connect the movable plate 14 to the adsorption layer 19. The adsorption layer 19 can be replaced if damaged, making it more flexible to use. Alternatively, the connectors can be nano double-sided adhesive, which adheres the movable plate 14 to the adsorption layer 19. This nano double-sided adhesive can be repeatedly applied and removed without residue, protecting the integrity of the adsorption layer 19 and the movable plate 14 surfaces. It is suitable for scenarios with large temperature differences, has waterproof and moisture-proof properties, and maintains adhesion even in humid environments. The adsorption layer 19 includes a sponge layer with a microfiber cloth on its outer side and microfiber cloth adhered to its sidewalls. The sponge layer quickly absorbs condensation, preventing water from seeping in. To prevent water droplet buildup, the soft surface of the microfiber cloth avoids scratching the objective lens 1. It has high water absorption, quickly absorbing condensation droplets without leaving residue after use, preventing white fogging after wiping, and effectively removing fingerprints and grease. The cloth is treated with antistatic agents to prevent dust adsorption. A push-pull plate 15 is installed in the through groove of the protective cover 13. One side of the push-pull plate 15 is located outside the protective cover 13, and the other side is fixed to the side wall of the movable plate 14. Moving the push-pull plate 15 causes the movable plate 14 and the adsorption layer 19 to move. Several springs 18 are installed between the movable plate 14 and the springs 18. An annular groove is opened at the top inside the protective cover 13, and an annular plate 16 is installed in sliding engagement with it. Several through-holes are provided on the annular plate 16. A telescopic rod 17 is installed inside the spring 18; an annular plate 16 is provided in the annular groove at the top of the protective cover 13, which is in sliding fit with the annular plate 16. The annular plate 16 and the movable plate 14 are connected by several telescopic rods 17. One end of the hollow rod of the telescopic rod 17 is welded or glued to the side wall of the annular plate 16, and the other end of the hollow rod is fitted with a solid rod. The other end of the solid rod is welded or glued to the side wall of the movable plate 14. Two symmetrically distributed limiting blocks are provided on the side wall of the solid rod. A limiting groove is opened on the inner wall of the hollow rod corresponding to the limiting block, which is in sliding fit with the limiting block. Through the sliding fit between the limiting groove and the limiting block, the telescopic rod 17 has a limited extension length. The solid rod of the telescopic rod 17 cannot be detached from the hollow rod, thus ensuring the stability of the extension of the telescopic rod 17.Furthermore, the spring 18 is independently installed inside the telescopic rod 17. One end of the spring 18 is welded to the side wall of the annular plate 16, and the other end is welded to the side wall of the movable plate 14. The number of springs 18 and telescopic rods 17 is the same.

[0030] In use, the push-pull plate 15 is moved inwards towards the protective cover 13, causing the moving plate 14 and the adsorption layer 19 to move. The sponge sidewall of the adsorption layer 19 contacts the protective cover 13, the annular sleeve 2, and the inner wall of the objective lens 1's protective ring, thereby absorbing the moisture on them. The microfiber cloth of the adsorption layer 19 contacts the objective lens 1. At this time, the spring 18 is stretched and deformed, and the telescopic rod 17 extends. The microfiber effectively adsorbs the moisture, grease, or dust condensed by frost and fog. Then, the push-pull plate 15 is rotated, causing the moving plate 14 and the adsorption layer 19 to rotate. Driven by the telescopic rod 17, the annular plate 16 moves accordingly. The rotation, driven by the telescopic rod 17 and the spring 18, causes the adsorption layer 19 to move and rotate to clean the frost. The friction and centrifugal force generated by the rotation of the microfiber cloth of the adsorption layer 19 help to quickly decompose stubborn frost and improve cleaning efficiency. The rotation wipe can evenly cover the entire objective lens 1, avoiding areas that may be missed by unidirectional wiping, which is especially suitable for circular objective lenses 1. After cleaning, the push-pull plate 15 is released, and the telescopic rod 17 retracts under the elastic force of the spring 18, which drives the moving plate 14 and the adsorption layer 19 back into the protective cover 13.

[0031] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a solar panel 10 is provided on the surface of the housing 12; a solar panel 10 is installed on the top of the housing 12, and the solar panel 10 is electrically connected to the storage battery 11 through a photovoltaic controller. The solar panel 10 converts solar energy into electrical energy and stores it in the storage battery 11. When there is sufficient sunlight, solar energy is used to directly supply power, and excess electrical energy is stored in the storage battery 11. At night or on cloudy or rainy days, the power supply is switched to the storage battery 11 to achieve uninterrupted energy supply. The storage battery 11 can better supply power to components such as the blower fan 6 and the heating grid 5 to ensure continuous defogging of the objective lens 1.

[0032] In actual use, the defogging component is detachably connected to the aiming section of the total station body 20. The side wall of the annular sleeve 2 is attached to the side wall of the protective ring of the objective lens 1. Then, the heating grid 5 is activated to heat the lens. The blower fan 6 blows air onto the heating grid 5, allowing the hot air to enter the annular sleeve 2 through the connecting channel 4. Finally, the hot air is blown onto the objective lens 1 through several air guide holes 3. The inclined air guide holes 3 ensure that the surface of the objective lens 1 is heated evenly, clearing the frost and fog condensed on the surface of the objective lens 1. The hot air continues to blow onto the objective lens 1, stabilizing the temperature of the objective lens 1 and preventing fogging. Measurements can be performed using the total station body 20 without interrupting the work of the surveyors, ensuring measurement efficiency and continuity.

Claims

1. A defogging device for a total station objective lens, comprising a total station body (20), wherein a defogging assembly is detachably connected to the aiming section of the total station body (20), characterized in that: The defogging assembly includes a housing (12), and an annular sleeve (2) is provided below the housing (12) in front of the objective lens (1) of the total station body (20). The side wall of the annular sleeve (2) is fitted with the protective ring of the objective lens (1). The annular sleeve (2) has a hollow structure inside. The annular sleeve (2) and the housing (12) are connected and communicated through a connecting channel (4). A heating mesh (5) is installed inside the housing (12). A blower (6) is installed above the heating mesh (5) to blow the heat generated by the heating mesh (5) toward the annular sleeve (2). Several air guide holes (3) are opened on the inner wall of the annular sleeve (2). The air guide holes (3) are inclined and the air outlet of the air guide holes (3) faces the objective lens (1).

2. The defogging device for total station objectives according to claim 1, characterized in that: The housing (12) is hinged to a protective cover (13). An adsorption layer (19) is provided inside the protective cover (13). A movable plate (14) is provided on the adsorption layer (19). A through groove is provided on the protective cover (13). A push-pull plate (15) connected to the movable plate (14) is provided at the through groove. Several springs (18) are provided between the movable plate (14) and the top of the protective cover (13).

3. The defogging device for total station objectives according to claim 2, characterized in that: The protective cover (13) has an annular groove at the top, and an annular plate (16) that slides in the groove is provided therewith. Several telescopic rods (17) are installed on the annular plate (16) and inserted into the spring (18).

4. The defogging device for total station objectives according to claim 1, characterized in that: A fixing plate (7) is provided inside the housing (12), and a storage battery (11) is installed on the fixing plate (7).

5. The defogging device for total station objectives according to claim 4, characterized in that: A solar panel (10) is provided on the surface of the housing (12).

6. The defogging device for total station objectives according to claim 1, characterized in that: The total station body (20) is provided with an embedded block (9) on the aiming part, and a slot is provided at the bottom of the side wall of the housing (12) to be inserted into it.

7. The defogging device for total station objectives according to claim 2, characterized in that: The adsorption layer (19) is connected to the moving plate (14) via a connector.

8. The defogging device for total station objectives according to claim 2, characterized in that: The adsorption layer (19) includes a sponge layer, and a microfiber cloth is provided on the outside of the sponge layer.

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