Portable engineering surveying and mapping device
The defogging mechanism, which combines heating wires and a fan, solves the problem of lens fogging in the surveying instrument under low temperature and high humidity conditions. It achieves rapid defogging and reduces secondary fogging, ensuring the normal operation of the surveying instrument and the accuracy of measurements.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-08
- Publication Date
- 2026-04-10
AI Technical Summary
In low-temperature and high-humidity environments, the lenses of surveying instruments are prone to fogging, which affects surveying work. Existing technologies are difficult to effectively and quickly remove fog and prevent secondary fogging.
The device uses a heating wire to regulate the blowing temperature, combined with a fan to drive airflow, and utilizes the principle of evaporation to accelerate moisture evaporation. The storage design of the defogging mechanism ensures lens clarity, and the dust removal component automatically removes dust from the filter plate to maintain the defogging effect.
It quickly eliminates fog, reduces the probability of secondary fogging, ensures clear mapping instrument lenses, is suitable for low temperature and high humidity environments, maintains normal equipment operation and measurement accuracy, and balances aesthetics and safety.
Smart Images
Figure CN121829481A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of engineering surveying, and more particularly to a portable engineering surveying device. Background Technology
[0002] Engineering surveying is the "eyes" of engineering construction, and engineering surveying equipment is the core tool for achieving accurate surveying. By collecting and processing geospatial information, it provides data support for engineering planning, design, construction, and operation and maintenance. With the development of electronic technology and satellite positioning technology, electronic surveying equipment has become the core equipment for current engineering surveying due to its advantages of high accuracy and high efficiency. Electronic total station: integrates electronic distance measurement, electronic angle measurement, and data processing functions. It can simultaneously measure distance, angle, and elevation difference. Its working principle is: it transmits a signal to the target point through an infrared or laser distance measurement module, receives the reflected signal, calculates the propagation time, and then obtains the distance between the surveying station and the target point. Currently, when using surveying instruments, especially in winter when the outdoor temperature is low, the lenses on the instrument fog up due to the large temperature difference after the user takes the instrument out of the toolbox, which affects the user's surveying work. In addition, the large temperature difference and high humidity in the surveying work environment cause a lot of water mist to form on the lens, which easily causes the lens on the surveying instrument to fog up again. Therefore, a portable engineering surveying device is designed. Summary of the Invention
[0003] To address the technical problems mentioned in the background section, this invention provides a portable engineering surveying device. Its advantages lie in using a heating wire to regulate the blowing temperature, increasing the lens temperature and accelerating moisture evaporation, quickly defogging and reducing the probability of secondary fogging, making it suitable for low-temperature and high-humidity environments.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: A portable engineering surveying device includes a surveying instrument body and further includes: A base is provided on the surveying instrument body, the surveying instrument body is provided with a defogging mechanism, the defogging mechanism is used to defog the lens of the surveying instrument body, the surveying instrument body is provided with a storage component adapted to the defogging mechanism, the storage component is used to store and protect the defogging mechanism, and; A mounting plate is set on one side of the surveying instrument body, and an adjustment mechanism is provided on the surveying instrument body for adjusting the angle and position of the mounting plate.
[0005] Preferably, the adjustment mechanism includes: a cylindrical groove formed on the surveyor body, a motor fixed on the surveyor body, and a main shaft rotatably connected in the cylindrical groove, one end of the main shaft being fixed to the mounting plate, the output shaft of the motor being driven by the main shaft via a pulley and a belt, a toothed ring fixed in the cylindrical groove, and a driven shaft rotatably connected to the mounting plate, a small gear fixed on the driven shaft and meshing with the toothed ring, a bearing plate slidably connected to the mounting plate, and racks fixed on both sides of the bearing plate, a large gear a fixed on the driven shaft and meshing with the racks, a transmission plate fixed on the main shaft, and the driven shaft rotatably connected to the transmission plate.
[0006] Preferably, the storage component includes: a protective cover fixed to the mounting plate, with a support plate located inside the protective cover; a rotating shaft is rotatably connected to the mounting plate; a large gear b that meshes with a rack is fixed on the rotating shaft; at least two guide grooves are fixed to the mounting plate; and the support plate is slidably connected to the guide grooves.
[0007] Preferably, the defogging mechanism includes: a mounting groove is provided on the support plate, a fan is fixed in the mounting groove, a groove adapted to the fan is provided on the mounting plate, a heating wire is fixed in the mounting groove and the heating wire is located on one side of the fan, a filter plate is slidably connected in the groove, and a dust removal component adapted to the filter plate is provided on the protective cover.
[0008] Preferably, the dust removal component includes: a through groove on the protective cover, and a scraper rotatably connected to the through groove via a rotating rod, the scraper abutting against the filter plate, and two spring pieces fixed between the scraper and the protective cover; a plurality of rods fixed on the fan, and the filter plate slidingly passing through the rods; a spring sleeved on the rod, one end of the spring being fixed to the filter plate, and the other end of the spring being fixed to the fan.
[0009] Preferably, the central axis of the main shaft and the central axis of the toothed ring are collinear, and the central axis of the cylindrical groove and the central axis of the toothed ring are collinear.
[0010] Preferably, at least two limiting plates are fixed inside the cylindrical groove, the transmission plate is located between the two limiting plates, and the included angle between the two limiting plates is a right angle.
[0011] Preferably, a limiting plate is fixed on the rack, and the length of the limiting plate is greater than the length of the teeth of the rack.
[0012] Preferably, the scraper is set at an acute angle at one end near the filter plate, and the scraper abuts against the filter plate.
[0013] Preferably, the surveying instrument body has a channel connected to the cylindrical groove, the belt is located inside the channel, and a protective shell is fixed on the surveying instrument body, with the motor located inside the protective shell.
[0014] Compared with the prior art, the present invention has the following beneficial effects: This invention utilizes a defogging mechanism. When the amount of fog on the surveying instrument's lens is small and the fogging time is short, a fan-driven airflow accelerates the airflow speed on the lens surface. Based on the principle of evaporation, the increased airflow speed accelerates the evaporation of small water droplets on the lens surface, causing the fog to dissipate quickly and restoring the lens to clarity. Furthermore, for winter surveying work, a heating wire can be used to regulate the airflow temperature. By increasing the temperature of the surveying instrument's lens and accelerating moisture evaporation, fog is quickly eliminated and the probability of secondary fogging is reduced. This defogging mechanism is particularly suitable for low-temperature, high-humidity environments. When the fog on the surveying instrument's lens is small and the fogging time is short, a fan-driven airflow accelerates the airflow on the lens surface, accelerating the evaporation of small water droplets based on the principle of evaporation, causing the fog to dissipate quickly and restoring the lens to clarity.
[0015] This invention, through the design of the dust removal component, applies effective squeezing and shaking motions to the filter plate during the fan's retraction to the storage mechanism. This causes the filter plate to be subjected to regular vibration and pressure during storage, effectively shaking off dust particles adhering to the filter plate surface. This significantly reduces the amount of dust accumulation on the filter plate, making it particularly suitable for high-dust-concentration working environments such as engineering surveying. In practical applications, this automatic dust removal function can continuously maintain the cleanliness of the filter plate, preventing excessive dust from affecting the equipment's defogging effect and blowing performance, thus providing a more reliable environmental guarantee for engineering surveying work.
[0016] This invention, through the structure of the storage component, can completely house the components of the defogging mechanism within the internal space of the protective cover. This not only achieves the overall storage function of the defogging mechanism components, but more importantly, it provides comprehensive shielding protection for these components, preventing them from being exposed to the external environment. This effectively prevents exposed components from interfering with surveying work, ensuring the normal operation of the surveying equipment and the accuracy of the measurement data. At the same time, this storage design also takes into account the aesthetics and safety of the equipment. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a side view of the structure of the present invention; Figure 3 This is a schematic diagram of the rear view structure of the present invention; Figure 4 This is a schematic diagram of the adjustment mechanism structure of the present invention; Figure 5 for Figure 4 Enlarged schematic diagram of the structure of region A in the middle; Figure 6 This is a schematic diagram of the support plate structure of the present invention; Figure 7 This is a side sectional view of the mounting plate and bearing plate of the present invention; Figure 8 for Figure 7 Enlarged schematic diagram of the structure of region B in the middle; Figure 9 This is a schematic diagram of the cylindrical groove structure of the present invention; Figure 10 for Figure 9 Enlarged schematic diagram of the structure of region C in the middle; Figure 11 This is a schematic diagram of the storage component structure of the present invention; Figure 12 for Figure 11 Enlarged schematic diagram of the structure of region D in the middle; Figure 13 This is a schematic diagram of the toothed ring and pinion structure of the present invention; Figure 14 for Figure 13 Enlarged schematic diagram of the structure of region E in the middle; Figure 15 This is a schematic diagram showing the relationship between the transmission plate and the limiting plate of the present invention.
[0019] Drawing number explanation: 1. Surveying instrument body; 2. Base; 3. Defogging mechanism; 4. Storage assembly; 5. Mounting plate; 6. Adjustment mechanism; 7. Cylindrical groove; 8. Motor; 9. Main shaft; 10. Pulley; 11. Belt; 12. Gear ring; 13. Driven shaft; 14. Pinion; 15. Bearing plate; 16. Rack; 17. Large gear a; 18. Transmission plate; 19. Protective cover; 20. Rotating shaft; 21. Large gear b; 22. Guide groove; 23. Mounting groove; 24. Fan; 25. Groove; 26. Heating wire; 27. Filter plate; 28. Dust removal component; 29. Through groove; 30. Rotating rod; 31. Scraper; 32. Spring; 33. Rod body; 34. Spring; 35. Limiting plate; 36. Restriction plate; 37. Channel; 38. Protective shell. Detailed Implementation
[0020] The present invention will now be described in further detail with reference to the accompanying drawings.
[0021] The following description is intended to disclose the invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.
[0022] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing this invention and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this invention.
[0023] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.
[0024] Example 1: Please refer to Figure 1-15 A portable engineering surveying device includes a surveying instrument body 1, and further includes: a base 2 disposed on the surveying instrument body 1; a defogging mechanism 3 disposed on the surveying instrument body 1 for defogging the lens of the surveying instrument body 1; a storage component 4 disposed on the surveying instrument body 1 adapted to the defogging mechanism 3 for storing and protecting the defogging mechanism 3; and a mounting plate 5 disposed on one side of the surveying instrument body 1; an adjustment mechanism 6 disposed on the surveying instrument body 1 for adjusting the angle and position of the mounting plate 5. The main structure of the surveying instrument body 1 consists of a telescope system, a level system, and a base 2 system. The difference between the two points of the scale reading is obtained by reading the horizontal line of sight. The surveying instrument body 1 is an existing product and is a conventional setting in this field, so it will not be described in detail here. It should be noted that when defogging is required on the lens of the surveying instrument body 1, the defogging mechanism 3 is moved to a suitable defogging position by adjusting the mechanism 6. The defogging mechanism 3 blows air onto the lens of the surveying instrument body 1 to solve the problem of lens fogging. After the defogging of the lens of the surveying instrument body 1 is completed, the defogging mechanism 3 is adjusted into the storage mechanism by adjusting the mechanism 6 to complete the task of storing and protecting the component.
[0025] Furthermore, the adjustment mechanism 6 includes: a cylindrical groove 7 formed on the surveyor body 1; a motor 8 fixed on the surveyor body 1; a main shaft 9 rotatably connected within the cylindrical groove 7; one end of the main shaft 9 fixed to the mounting plate 5; the output shaft of the motor 8 and the main shaft 9 being driven by a pulley 10 and a belt 11; a toothed ring 12 fixed within the cylindrical groove 7; a driven shaft 13 rotatably connected to the mounting plate 5; a small gear 14 fixed on the driven shaft 13 and meshing with the toothed ring 12; a bearing plate 15 slidably connected to the mounting plate 5; and racks 16 fixed on both sides of the bearing plate 15. A limiting plate 36 is fixed on the rack 16, and the length of the limiting plate 36 is greater than the tooth length of the rack 16. The limiting plate 36 serves to limit the bearing plate 15 and prevent the rack 16 from disengaging from the large gear a17. A large gear a17 that meshes with the rack 16 is fixed on the shaft 13. A transmission plate 18 is fixed on the main shaft 9 and is rotatably connected to the shaft 13 and the transmission plate 18. The central axis of the main shaft 9 is collinear with the central axis of the toothed ring 12. The central axis of the cylindrical groove 7 is collinear with the central axis of the toothed ring 12. In this design, at least two limiting plates 35 are fixed inside the cylindrical groove 7, and the transmission plate 18 is located between the two limiting plates 35. The angle between the two limiting plates 35 is set at a right angle. By reasonably setting the structure and position of the limiting plates 35, the swing amplitude of the transmission plate 18 can be effectively controlled and strictly limited to a range of ninety degrees. This design can ensure that the transmission plate 18 always maintains a stable motion trajectory during operation and avoids the angle deviation caused by the rotation angle exceeding the preset range. The constraint effect of the limiting plates 35 not only ensures the accurate operation of the transmission plate 18, but also prevents mechanical wear or component damage caused by excessive swing. Specifically, the storage component 4 includes: a protective cover 19 fixed on the mounting plate 5, with the support plate 15 located inside the protective cover 19; a rotating shaft 20 rotatably connected to the mounting plate 5; and a large gear b21 fixed on the rotating shaft 20 that meshes with the rack 16. The addition of the large gear b21 enhances the stability of the support plate 15 when it moves under force, preventing wobbling during movement. At least two guide grooves 22 are fixed on the mounting plate 5, and the support plate 15 is slidably connected to the guide grooves 22. The addition of the guide grooves 22 guides the support plate 15, ensuring relative stability during movement under force and providing support for the support plate 15. The support effectively enhances the stability of the bearing plate 15. By rationally configuring the structural layout of the storage component 4, the components of the defogging mechanism 3 can be completely stored in the internal space of the protective cover 19. This not only realizes the overall storage function of the components of the defogging mechanism 3, but more importantly, it provides all-round shielding protection for these components. This protective measure can prevent the components of the defogging mechanism 3 from being directly exposed to the external environment, and can also effectively prevent the exposed components from interfering with the surveying work, ensuring the normal operation of the surveying equipment and the accuracy of the measurement data. At the same time, this storage design also takes into account the aesthetics and safety of the equipment, making the entire surveying work more neat and orderly. It should be noted that the surveying instrument body 1 has a channel 37 that communicates with the cylindrical groove 7. The belt 11 is located inside the channel 37. The channel 37 provides sufficient space for the belt 11. The surveying instrument body 1 is also fixed with a protective shell 38. The motor 8 is located inside the protective shell 38. By adding a protective shell, the motor 8 can be effectively protected in all aspects. This not only prevents the motor 8 from being directly exposed to the external environment, but also prevents external factors such as dust, moisture, and foreign objects from corroding and damaging the motor 8, thus extending the service life of the motor 8. It should also be noted that by adjusting the mechanism 6, the defogging mechanism 3 can be precisely adjusted to the optimal working position for efficient defogging operation according to the actual usage scenario and specific defogging requirements. At the same time, the adjustment mechanism 6 has good flexibility and can adjust the installation position and angle of the defogging device at any time according to different working conditions. This ensures the optimization of the defogging effect and effectively avoids occupying too much space due to the fixed installation of the defogging mechanism 3, thereby ensuring that the normal use of the surveying instrument body 1 is not affected and maintaining the stable performance of the overall equipment. The adjustable design not only meets the defogging function requirements, but also takes into account the convenience of equipment use and space utilization. In this scheme, the principle of the adjustment mechanism 6 is as follows: driven by the motor 8, the main shaft 9 rotates synchronously through the transmission action of the pulley 10 and the belt 11, which drives the mounting plate 5 and the transmission plate 18 to rotate synchronously, causing the driven shaft 13 to rotate synchronously. Through the meshing transmission action of the pinion 14 and the toothed ring 12, the driven shaft 13 can rotate on its own axis when rotating in a circle, which in turn drives the large gear a17 to rotate synchronously. Through the meshing transmission action between the large gear a17 and the rack 16, the bearing plate 15 moves under force, so that the mounting plate 5 rotates ninety degrees and then moves forward to support the load.
[0026] Furthermore, the defogging mechanism 3 includes: a mounting groove 23 is provided on the support plate 15, a fan 24 is fixed in the mounting groove 23, a groove 25 adapted to the fan 24 is provided on the mounting plate 5, a heating wire 26 is fixed in the mounting groove 23 and the heating wire 26 is located on one side of the fan 24, and a filter plate 27 is slidably connected in the groove 25. The filter plate 27 filters the air at the air inlet of the fan 24 to prevent the high dust content in the air from affecting the defogging effect. Among them, the heating wire 26 is an existing product, and its temperature is preset to 35-40℃, which effectively and quickly eliminates local small-scale fog. This is a conventional setting in this field, so it will not be described in detail here. It should be noted that, through the setting of the defogging mechanism 3, when the amount of fog on the lens of the surveying instrument body 1 is small and the fogging time is short, the fan 24 drives the airflow to accelerate the air flow speed on the surface of the lens of the surveying instrument body 1. According to the principle of evaporation, the increased airflow speed will accelerate the evaporation of small water droplets on the lens surface, so that the fog on the lens can be quickly dissipated, thereby restoring the lens to clarity. In addition, when winter surveying work is needed, the heating wire 26 is used to adjust the blowing temperature. By increasing the temperature of the lens of the surveying instrument body 1 and accelerating the evaporation of moisture, the fog can be quickly eliminated and the probability of secondary fogging can be reduced. It is especially suitable for low temperature and high humidity environments. It should also be noted that using hot air defogging without contacting the lens can protect the optical performance of the surveying instrument body 1 lens to the greatest extent. It is especially suitable for high-end surveying instrument lenses with fragile coatings, effectively avoiding the wear and tear on the coating caused by frequent wiping with lens cloth, reducing the probability of secondary fogging, and effectively avoiding frequent interruptions of surveying operations due to fogging. It solves the problem that room temperature blowing can only temporarily remove surface water mist, but the lens temperature is still low, and water vapor in the environment will continue to liquefy, causing fogging to occur again after blowing. Using hot air can keep the surveying instrument body 1 lens at a suitable temperature for a short period of time. In this scheme, the defogging mechanism 3 is used to defog the lens of the surveying instrument body 1. The defogging principle is as follows: driven by the fan 24, a certain amount of wind is generated and blown specifically onto the lens of the surveying instrument body 1. Utilizing the principle of evaporation, the air flow speed is accelerated to speed up the evaporation of small water droplets on the lens surface. With the heating configuration of the heating wire 26, the blowing temperature is controlled at 35-40℃ to continuously keep the lens of the surveying instrument body 1 warm, thereby avoiding fogging of the lens of the surveying instrument body 1 due to temperature difference. After hot air defogging, the surveying instrument body 1 is left to stand in the environment for 2-3 minutes to allow the lens temperature to balance with the ambient temperature before observation begins, avoiding blurred vision during observation due to excessively high lens temperature.
[0027] Example 2: Refer to Figures 7-9 As shown, this embodiment further explains the first embodiment, the difference being that it discloses a method for cleaning the filter plate 27 of the fan 24.
[0028] Furthermore, the protective cover 19 is provided with a dust removal component 28 adapted to the filter plate 27. The dust removal component 28 includes: a through groove 29 on the protective cover 19, and a scraper 31 rotatably connected in the through groove 29 via a rotating rod 30. The scraper 31 abuts against the filter plate 27, and two spring pieces 32 are fixed between the scraper 31 and the protective cover 19. Several rods 33 are fixed on the fan 24, and the filter plate 27 slides through the rods 33. A spring 34 is sleeved on the rods 33. One end of the spring 34 is fixed to the filter plate 27, and the other end of the spring 34 is fixed to the fan 24. Among them, the scraper 31 is set with an acute angle at the end near the filter plate 27, and the scraper 31 abuts against the filter plate 27. The shape of one end of the scraper 31 ensures that the process can still be maintained when the filter plate 27 and the scraper 31 are squeezed, thus avoiding the scraper 31 from getting stuck. It should be noted that, through the setting of the dust removal component 28, effective squeezing and shaking action can be applied to the filter plate 27 during the process of the fan 24 being retracted to the storage mechanism. Through a specific structural design, the filter plate 27 is subjected to regular vibration and pressure during storage, thereby effectively shaking off the dust particles attached to the surface of the filter plate 27. This dust removal mechanism significantly reduces the amount of dust accumulation on the filter plate 27, and is particularly suitable for working environments with high dust concentrations, such as engineering surveying. In practical applications, this automatic dust removal function can continuously maintain the cleanliness of the filter plate 27, avoid affecting the defogging effect and blowing performance of the equipment due to excessive dust, and ensure that the measuring instrument can maintain a stable working state even in harsh environments, providing a more reliable environmental guarantee for engineering surveying work. In this scheme, the principle of using the dust removal component 28 to remove dust from the filter plate 27 is as follows: When the bearing plate 15 moves, the squeezing action between the filter plate 27 and the scraper 31 is used, and the elasticity of the spring 32 is used to ensure that the scraper 31 can keep in close contact with the gap of the filter plate 27, and can generate a vibration effect when the filter plate 27 moves. The elasticity of the spring 34 is used to make the scraper 31 move under force when it is squeezed with the filter plate 27, and the generated vibration effect is used to achieve the purpose of shaking off and cleaning dust.
[0029] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations of the implementation of the present invention may be made without departing from the principles.
Claims
1. A portable engineering surveying device, comprising a surveying instrument body (1); Its features are, Also includes: A base (2) is set on the surveying instrument body (1), the surveying instrument body (1) is provided with a defogging mechanism (3), the defogging mechanism (3) is used to defog the lens of the surveying instrument body (1), the surveying instrument body (1) is provided with a storage component (4) adapted to the defogging mechanism (3), the storage component (4) is used to store and protect the defogging mechanism (3), and; An installation plate (5) is set on one side of the surveying instrument body (1). An adjustment mechanism (6) is provided on the surveying instrument body (1). The adjustment mechanism (6) is used to adjust the angle position of the installation plate (5).
2. The portable engineering surveying device according to claim 1, characterized in that: The adjustment mechanism (6) includes: a cylindrical groove (7) formed on the surveying instrument body (1), a motor (8) fixed on the surveying instrument body (1), and a main shaft (9) rotatably connected in the cylindrical groove (7). One end of the main shaft (9) is fixed to the mounting plate (5). The output shaft of the motor (8) is driven to the main shaft (9) by a pulley (10) and a belt (11). A toothed ring (12) is fixed in the cylindrical groove (7), and the main shaft (9) is rotatably connected in the mounting plate (5). A slave shaft (13) is connected, and a small gear (14) that meshes with a toothed ring (12) is fixed on the slave shaft (13). A bearing plate (15) is slidably connected on the mounting plate (5), and racks (16) are fixed on both sides of the bearing plate (15). A large gear a (17) that meshes with the rack (16) is fixed on the slave shaft (13). A transmission plate (18) is fixed on the main shaft (9), and the slave shaft (13) is rotatably connected to the transmission plate (18).
3. The portable engineering surveying device according to claim 1, characterized in that: The storage component (4) includes: a protective cover (19) fixed on the mounting plate (5), and a support plate (15) located inside the protective cover (19). A rotating shaft (20) is rotatably connected to the mounting plate (5). A large gear b (21) that meshes with a rack (16) is fixed on the rotating shaft (20). At least two guide grooves (22) are fixed on the mounting plate (5), and the support plate (15) is slidably connected to the guide grooves (22).
4. The portable engineering surveying device according to claim 3, characterized in that: The defogging mechanism (3) includes: a mounting groove (23) on the support plate (15), a fan (24) fixed in the mounting groove (23), a groove (25) adapted to the fan (24) on the mounting plate (5), a heating wire (26) fixed in the mounting groove (23), and the heating wire (26) located on one side of the fan (24), a filter plate (27) slidably connected in the groove (25), and a dust removal component (28) adapted to the filter plate (27) on the protective cover (19).
5. A portable engineering surveying device according to claim 4, characterized in that: The cleaning component (28) includes: a through groove (29) on the protective cover (19), and a scraper (31) is rotatably connected in the through groove (29) via a rotating rod (30). The scraper (31) abuts against the filter plate (27), and two spring pieces (32) are fixed between the scraper (31) and the protective cover (19). Several rods (33) are fixed on the fan (24), and the filter plate (27) and the rods (33) are slidably connected through each other. A spring (34) is sleeved on the rod (33), one end of the spring (34) is fixed to the filter plate (27), and the other end of the spring (34) is fixed to the fan (24).
6. A portable engineering surveying device according to claim 2, characterized in that: The central axis of the main shaft (9) is collinear with the central axis of the toothed ring (12), and the central axis of the cylindrical groove (7) is collinear with the central axis of the toothed ring (12).
7. A portable engineering surveying device according to claim 2, characterized in that: At least two limiting plates (35) are fixed inside the cylindrical groove (7), and the transmission plate (18) is located between the two limiting plates (35), with the included angle between the two limiting plates (35) being a right angle.
8. A portable engineering surveying device according to claim 2, characterized in that: A limiting plate (36) is fixed on the rack (16), and the length of the limiting plate (36) is greater than the tooth length of the rack (16).
9. A portable engineering surveying device according to claim 5, characterized in that: The scraper (31) is set at an acute angle at one end near the filter plate (27), and the scraper (31) abuts against the filter plate (27).
10. A portable engineering surveying device according to claim 2, characterized in that: The surveying instrument body (1) has a channel (37) connected to the cylindrical groove (7), the belt (11) is located inside the channel (37), and a protective shell (38) is fixed on the surveying instrument body (1), and the motor (8) is located inside the protective shell (38).