Leveling device with rapid distance measurement function and use method thereof

Abstract

The invention relates to the technical field of engineering surveying, in particular to a leveling device with a rapid distance measuring function and a using method thereof.The leveling device comprises a leveling instrument and a leveling staff, the leveling instrument comprises a focusing assembly with a driving shaft, and focusing of the leveling instrument is achieved by rotating the driving shaft; the leveling device further comprises a distance reading dial and a gear transmission assembly, the distance reading dial is arranged on the leveling instrument, the power input end and the power output end of the gear transmission assembly are connected with the driving shaft and the distance reading dial respectively, and when the driving shaft rotates, the driving shaft drives the distance reading dial to rotate through the gear transmission assembly. When the leveling instrument completes focusing by rotating the driving shaft, the distance between the leveling instrument and the leveling rod in front of the leveling instrument can be directly read through the distance reading dial, and the leveling device can read the distance between the leveling instrument and the leveling rod without repeated observation and the use method of the leveling device.

Description

Technical Field

[0001] This invention relates to the field of engineering surveying technology, and in particular to a leveling device with rapid distance measurement function and its usage method. Background Technology

[0002] In the field of engineering surveying, leveling instruments play an irreplaceable role as crucial instruments for elevation measurement. During the use of leveling instruments, to reduce or eliminate major systematic errors and minimize the influence of atmospheric refraction, there are generally clear requirements regarding the difference between foresight and backsight distances. For example, the "Engineering Surveying Standard" (GB50026-2020) stipulates that the difference between foresight and backsight distances for second-order leveling should not exceed 1.0m, for third-order leveling not exceed 3.0m, and for fourth-order leveling not exceed 5.0m. The foresight and backsight distances are usually calculated by reading the numbers on the leveling rod corresponding to the upper and lower crosshairs observed by the leveling instrument. Since each station requires reading four additional numbers—the upper and lower crosshairs of the front and back rods—and performing calculations, this affects the efficiency of the measurement. Summary of the Invention

[0003] The purpose of this invention is to provide a leveling measuring device with rapid distance measurement function and its usage method, so as to solve the technical problems existing in the background art.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows: A leveling measuring device with rapid distance measurement function includes: a level instrument and a leveling rod. The level instrument includes: a focusing assembly with a drive shaft, which enables the level instrument to be focused by rotating the drive shaft. The leveling measuring device also includes: a distance reading dial and a gear transmission assembly. The distance reading dial is mounted on the level instrument. The power input end and power output end of the gear transmission assembly are respectively connected to the drive shaft and the distance reading dial. When the drive shaft rotates, it drives the distance reading dial to rotate through the gear transmission assembly. When the level instrument is focused by rotating the drive shaft, the distance between the level instrument and the leveling rod in front of it can be directly read through the distance reading dial.

[0005] Furthermore, the level also includes: a level body and a focusing concave lens. The level body is a shell structure that runs through the front and back, and the focusing concave lens is slidably installed inside the level body. The focusing assembly also includes: a rack, a cylindrical gear, and a knob. The rack is fixedly connected to the right end of the outer wall of the focusing concave lens. The cylindrical gear meshes with the rack and can drive the rack to move the focusing concave lens back and forth. The cylindrical gear is coaxially fixedly connected to one end of a drive shaft. The drive shaft passes through and rotatably connects to the right side wall of the level body. The other end of the drive shaft is coaxially fixedly connected to a knob.

[0006] Furthermore, the gear transmission assembly includes: cylindrical gear two, cylindrical gear three, cylindrical gear four, cylindrical gear five, connecting shaft one, connecting shaft two, and connecting shaft three. Cylindrical gear two is coaxially fixedly connected to the drive shaft. Cylindrical gear two, cylindrical gear three, cylindrical gear four, and cylindrical gear five mesh sequentially. Cylindrical gear three, cylindrical gear four, and cylindrical gear five are rotatably mounted on the right inner wall of the level instrument body through connecting shaft one, connecting shaft two, and connecting shaft three, respectively. The distance reading dial is disc-shaped and coaxially fixedly mounted on cylindrical gear five. A strip-shaped hole penetrating into the inner cavity is opened at the top of the level instrument body. The upper part of the distance reading dial passes through the strip-shaped hole and exposes the distance scale provided on it.

[0007] Furthermore, the leveling measuring device also includes: a pointer and a transparent cover. The tail end of the pointer is fixedly connected to the middle of the right side wall of the strip hole, and the tip of the pointer extends vertically upward out of the strip hole. The distance scale is located at the circumferential edge of the distance reading dial near the pointer. The transparent cover covers the top of the strip hole, and the tip of the pointer and the upper part of the distance reading dial are both located inside the transparent cover.

[0008] Furthermore, the level also includes: a slider, a slide rail, and baffles. The slider is T-shaped. A slide rail is fixedly installed at the bottom center of the inner wall of the level body. A T-shaped groove is provided at the top of the slide rail. The slider is fitted onto the slide rail and can slide back and forth along the slide rail. Two baffles are symmetrically fixedly installed at the front and rear ends of the slide rail. The focusing concave lens includes: a focusing lens tube and a focusing lens. The focusing lens is fixedly installed on the inner wall of the focusing lens tube, and the focusing lens tube is fixedly installed at the top of the slider.

[0009] Furthermore, the level also includes an eyepiece, a crosshair reticle, and an objective lens. The objective lens and the eyepiece are respectively disposed at the front and rear ends of the level body. The crosshair reticle is located between the eyepiece and the focusing concave lens. The eyepiece, the crosshair reticle, the focusing concave lens, and the objective lens are coaxially arranged.

[0010] Furthermore, the eyepiece includes an eyepiece tube and an eyepiece lens, both of which are fixedly mounted on the inner wall of the eyepiece tube, and the eyepiece tube is fixedly connected to the rear end of the level body; the objective lens includes an objective lens tube and an objective lens, both of which are fixedly mounted on the inner wall of the objective lens tube, and the objective lens tube is fixedly connected to the front end of the level body.

[0011] Furthermore, the leveling device also includes: a focusing plate and fastening bolts, wherein a plurality of fastening bolts are provided, and the focusing plate is detachably fixed to the outer end port of the objective lens by the plurality of fastening bolts; a plurality of oblique slits are symmetrically provided on the upper and lower sides of the focusing plate, the oblique slits having an inclination angle of 8° to 15° relative to the vertical line, and the width of the oblique slits being 0.5mm to 2mm.

[0012] Furthermore, the leveling rod includes: a rod body, digital scales, focusing lights, handrails, a circular spirit level, and a power supply. The front and rear surfaces of the rod body are provided with digital scales for indicating elevation along the height direction. Several focusing lights are evenly arranged on the front and rear surfaces of the rod body along the height direction. A power supply is installed inside the rod body, and the power supply powers the several focusing lights. Handrails are provided on both the left and right sides of the rod body, and a circular spirit level is also provided on one side of the rod body.

[0013] A method for using a leveling device with rapid distance measurement function includes the following steps: Step 1: Position the level instrument and the leveling rod according to the measurement specifications. Fix the level instrument on the tripod and help level it. Keep the leveling rod vertical. Step 2: Turn on the focusing light on the leveling rod; Step 3: Fix the focusing plate onto the objective lens; Step 4: Initially aim at the leveling rod in front of the level instrument, then make fine adjustments to ensure that the level instrument is precisely aimed at the leveling rod in front of it; Step 5: Rotate the knob so that the focusing light on the leveling rod in front of the level instrument can be clearly seen through the level instrument; Step 6: Read the distance between the level instrument and the leveling rod in front of it directly through the distance reading dial.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention allows for the direct reading of the distance between the leveling instrument and the leveling rod in front of it via the distance reading dial after the leveling instrument has finished focusing. This distance is used as the actual distance between the leveling instrument and the leveling rod. This eliminates the need for multiple observations, allowing for the determination of the leveling instrument's proper position and the calculation of foresight and backsight distances. This significantly reduces measurement time while ensuring the quality of engineering surveying. The entire system is simple to operate and highly accurate.

[0015] 2. This invention reduces the modification cost by adding a gear transmission assembly, a distance reading dial, a pointer, and a transparent cover to the existing level instrument. The improved leveling device does not affect the original function of the level instrument and improves the measurement efficiency of foresight and backsight distance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of the level instrument in an embodiment of the present invention; Figure 2 This is a front view of the level instrument after the components below the lower housing have been removed in an embodiment of the present invention; Figure 3 This invention is in Figure 2 Cross-sectional view at point AA; Figure 4 This invention is in Figure 3 Cross-sectional view at point BB; Figure 5 This invention is in Figure 3 Cross-sectional view at point CC; Figure 6 This invention is in Figure 4 Cross-sectional view at point DD; Figure 7 This invention is in Figure 6 Cross-sectional view at the EE section; Figure 8 This is a schematic diagram of the level instrument after the upper housing is removed in an embodiment of the present invention; Figure 9 This is a front view of the leveling rod in an embodiment of the present invention; Figure 10 This is a schematic diagram of the internal structure of the leveling rod in an embodiment of the present invention.

[0017] The labels in the attached diagram are as follows: 1-Lower housing, 2-Upper housing, 3-Eyepiece tube, 4-Eyepiece lens, 5-Objective lens tube, 6-Objective lens, 7-Focusing tube, 8-Focusing lens, 9-Slider, 10-Slide rail, 11-Baffle, 12-Rack, 13-Cylindrical gear one, 14-Drive shaft, 15-Bearing, 16-Knob, 17-Cylindrical gear two, 18-Cylindrical gear three, 19-Cylindrical gear four, 20-Cylindrical gear five 21-Connecting shaft one, 22-Connecting shaft two, 23-Connecting shaft three, 24-Distance reading dial, 25-Pointer, 26-Transparent cover, 27-Crosshair reticle, 28-Sight gate, 29-Focusing plate, 30-Fasting bolt, 31-Rotating seat, 32-Fine adjustment screw, 33-Base, 34-Foot screw, 35-Scale body, 36-Digital scale, 37-Focusing lamp, 38-Handrail, 39-Circular spirit level, 40-Power supply. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0019] like Figures 1-4 and Figure 9As shown, a leveling measuring device with rapid distance measurement function includes: a level instrument and a leveling rod. The level instrument includes: a focusing assembly with a drive shaft 14, which enables the level instrument to be focused by rotating the drive shaft 14. The leveling measuring device also includes: a distance reading dial 24 and a gear transmission assembly. The distance reading dial 24 is mounted on the level instrument. The power input end and power output end of the gear transmission assembly are connected to the drive shaft 14 and the distance reading dial 24, respectively. When the drive shaft 14 rotates, the drive shaft 14 drives the distance reading dial 24 to rotate through the gear transmission assembly. When the level instrument is focused by rotating the drive shaft 14, the distance between the level instrument and the leveling rod in front of it can be directly read through the distance reading dial 24.

[0020] like Figure 3 , Figure 5 and Figure 7 As shown, the level also includes: a level body and a concave lens. The level body is a shell structure that runs through the front and back, and is formed by a detachable fixed connection between a lower shell 1 and an upper shell 2. The concave lens is slidably installed inside the level body. The focusing assembly also includes: a rack 12, a cylindrical gear 13, a bearing 15, and a knob 16. The rack 12 is fixedly connected to the right end of the outer wall of the concave lens. The cylindrical gear 13 meshes with the rack 12 and can drive the rack 12 to move the concave lens back and forth. The cylindrical gear 13 is coaxially fixedly connected to one end of a drive shaft 14. The drive shaft 14 is rotatably mounted on the right side wall of the lower shell 1 through the bearing 15, and the drive shaft 14 passes through the right side wall of the lower shell 1. The other end of the drive shaft 14 is coaxially fixedly connected to a knob 16. By rotating the knob 16, the drive shaft 14 and the cylindrical gear 13 are rotated, which in turn drives the rack 12 to move the concave lens back and forth, thereby realizing the focusing of the entire level.

[0021] like Figure 4 , Figure 6 and Figure 8 As shown, the gear transmission assembly includes: cylindrical gear 217, cylindrical gear 318, cylindrical gear 419, cylindrical gear 520, connecting shaft 121, connecting shaft 22, and connecting shaft 323. Cylindrical gear 217 is coaxially fixedly connected to the drive shaft 14. Cylindrical gear 217, cylindrical gear 318, cylindrical gear 419, and cylindrical gear 520 mesh sequentially. Cylindrical gear 318 is rotatably mounted on the right inner wall of the lower housing 1 via connecting shaft 121. Cylindrical gear 419 and cylindrical gear 520 are rotatably mounted on the right inner wall of the upper housing 2 via connecting shaft 22 and connecting shaft 323, respectively. The distance reading dial 24 is disc-shaped and coaxially fixedly mounted on cylindrical gear 520. The top of the upper housing 2 has a strip-shaped hole that penetrates into its inner cavity. The upper part of the distance reading dial 24 passes through the strip-shaped hole and exposes the distance scale provided on it.

[0022] Since the level instrument in this invention requires clockwise rotation of knob 16 to focus after being set up, and the distance scale value on the distance reading dial 24 gradually increases clockwise, and since the pointer 25 remains stationary, the distance reading dial 24 needs to rotate counterclockwise when knob 16 is rotated clockwise. To ensure that the distance reading dial 24 does not interfere with the drive shaft 14, and that the upper part of the distance reading dial 24 can pass through the strip hole and expose the distance scale on it, cylindrical gears 17, 18, 19, and 20 are designed. Cylindrical gear 17 is coaxially fixed with the drive shaft 14, and the distance reading dial 24 is coaxially fixed with cylindrical gear 20, thereby preventing interference between the distance reading dial 24 and the drive shaft 14.

[0023] like Figure 1 , Figure 6 and Figure 8 As shown, the leveling device also includes: a pointer 25 and a transparent cover 26. The tail end of the pointer 25 is fixedly connected to the middle of the right side wall of the slot, and the tip of the pointer 25 extends vertically upward out of the slot. The distance scale is set at the circumferential edge of the distance reading dial 24 near the pointer 25. The scale range of the distance scale is set according to the measurement specifications, usually 0~100m, but can also be set to 0~50m. The transparent cover 26 covers the top of the slot, and the tip of the pointer 25 and the upper part of the distance reading dial 24 are both located inside the transparent cover 26. The specific distance scale value pointed to by the pointer 25 on the distance reading dial 24 can be directly observed through the transparent cover 26.

[0024] In this embodiment of the invention, the distance measuring range of the level is set to 0~100m, and the distance scale range on the distance reading dial 24 is 0~100m; when the second cylindrical gear 17 rotates 2 revolutions, the fifth cylindrical gear 20 rotates 1 revolution; when the second cylindrical gear 17 rotates 1 revolution (i.e., the knob rotates 1 revolution), the rack 12 drives the concave lens to move axially by 25mm, and the image at a distance of 50m can be clearly seen through the level. At this time, the distance reading dial 24 rotates 1 / 2 revolution, and the pointer 25 points to the 50m scale value on the distance reading dial 24; when the second cylindrical gear 17 rotates 2 revolutions (i.e., the knob rotates 2 revolutions), the rack 12 drives the concave lens to move axially by 50mm, and the image at a distance of 100m can be clearly seen through the level. At this time, the distance reading dial 24 rotates 1 revolution, and the pointer 25 points to the 100m scale value on the distance reading dial 24.

[0025] like Figure 3 and Figure 7As shown, the level also includes: a slider 9, a slide rail 10, and baffles 11. The slider 9 is T-shaped. The slide rail 10 is fixedly installed in the middle of the bottom of the inner wall of the level body. A T-shaped groove is opened at the top of the slide rail 10. The slider 9 is fitted on the slide rail 10 and can slide back and forth along the slide rail 10. Two baffles 11 are symmetrically fixedly installed at the front and rear ends of the slide rail 10. The focusing concave lens includes: a focusing lens tube 7 and a focusing lens 8. The focusing lens 8 is fixedly installed on the inner wall of the focusing lens tube 7, and the focusing lens tube 7 is fixedly installed at the top of the slider 9.

[0026] like Figure 7 As shown, the level also includes an eyepiece, a crosshair reticle 27, and an objective lens. The objective lens and eyepiece are respectively located at the front and rear ends of the level body. The crosshair reticle 27 is located between the eyepiece and the focusing concave lens. The eyepiece, crosshair reticle 27, focusing concave lens, and objective lens are coaxially arranged.

[0027] like Figure 7 As shown, the eyepiece includes: an eyepiece tube 3 and an eyepiece lens 4. The eyepiece lens 4 and the crosshair reticle 27 are both fixedly installed on the inner wall of the eyepiece tube 3. The eyepiece tube 3 is fixedly connected to the rear end of the level body. The objective lens includes: an objective lens tube 5 and an objective lens 6. The objective lens 6 is fixedly installed on the inner wall of the objective lens tube 5. The objective lens tube 5 is fixedly connected to the front end of the level body.

[0028] like Figure 1 and Figure 7 As shown, the leveling device also includes: a focusing plate 29 and fastening bolts 30. Several fastening bolts 30 are provided. The focusing plate 29 is detachably fixed to the outer end port of the objective lens barrel 5 by several fastening bolts 30. Several oblique slits are symmetrically arranged on the upper and lower sides of the focusing plate 29. The inclination angle of the oblique slits relative to the vertical line is 8°~15°, and the width of the oblique slits is 0.5mm~2mm. The material of the focusing plate 29 should be an opaque, hard and flat material, preferably a black acrylic plate, and the thickness should be between 1 and 3mm.

[0029] like Figure 1 As shown, the level also includes: a sight 28, a rotating base 31, a fine adjustment screw 32, a base 33, and foot screws 34. The sight 28 is fixedly connected to the middle left side of the top of the upper housing 2, and the rotating base 31 is fixedly connected to the middle bottom of the lower housing 1. The rotating base 31 is provided with a fine adjustment screw 32 for finely adjusting the horizontal rotation angle of the level body. Several foot screws 34 for adjusting the levelness of the level body are provided between the rotating base 31 and the base 33. The rotating base 31 is divided into an upper base and a lower base. The top of the upper base is fixedly connected to the lower housing 1, and the upper base is rotatably mounted on the lower base. The lower base is connected to the top of several foot screws 34 respectively. This section is the prior art, and the specific internal structure of each component will not be described in detail.

[0030] like Figure 9 and Figure 10 As shown, the leveling rod includes: a rod body 35, digital scales 36, focusing lights 37, handrails 38, a circular bubble level 39, and a power supply 40. The front and back sides of the rod body 35 are provided with digital scales 36 for indicating elevation along the height direction. Several focusing lights 37 are evenly arranged along the height direction on the front and back sides of the rod body 35. The power supply 40 is installed inside the rod body 35, and the power supply 40 supplies power to the several focusing lights 37. Handrails 38 are provided on both the left and right sides of the rod body 35, and a circular bubble level 39 is also provided on one side of the rod body 35.

[0031] A method for using a leveling device with rapid distance measurement function includes the following steps: Step 1: Position the level instrument, the leveling rod in front of the level instrument, and the leveling rod behind the level instrument according to the measurement specifications. Fix the level instrument on the tripod using the base 33. Use the leveling screws 34 to assist in leveling. The person holding the leveling rod holds the handles 38 with both hands and continuously adjusts the leveling rod by observing the circular bubble 39 until the leveling rod remains vertical. Step 2: Turn on the focusing lights on both leveling rods 37; Step 3: Fix the focusing plate 29 to the outer end port of the objective lens barrel 5 using several fastening bolts 30; Step 4: Initially aim at the leveling rod in front of it through the sight 28 on the level instrument, and then rotate the fine adjustment screw 32 to make the level instrument accurately aim at the leveling rod in front of it; Step 5: Rotate knob 16 so that the focusing lamp 37 on the leveling rod in front of the level instrument can be clearly seen through the level instrument; at this time, due to the diffraction of light, when the focus is correct, the focusing lamp 37 diffracts three clear rays of light through the focusing plate 29, and the three rays of light converge at the same point; when the focus is not correct, the three rays of light are not clear and do not converge at the same point; (this principle is common knowledge in this field and will not be elaborated further). Step 6: Read the distance scale corresponding to the distance reading dial 24 pointed to by the tip of pointer 25. The reading value is the distance between the level instrument and the leveling rod located in front of it.

[0032] The method for measuring elevation differences using the leveling device provided by this invention includes the following steps: Step 1: Position the level instrument, the leveling rod in front of the level instrument, and the leveling rod behind the level instrument according to the measurement specifications. Fix the level instrument on the tripod using the base 33. Use the leveling screws 34 to assist in leveling. The person holding the leveling rod holds the handles 38 with both hands and continuously adjusts the leveling rod by observing the circular bubble 39 until the leveling rod remains vertical. Step 2: Turn on the focusing lights on both leveling rods 37; Step 3: Fix the focusing plate 29 to the outer end port of the objective lens barrel 5 using several fastening bolts 30; Step 4: Initially aim at the leveling rod in front of it through the sight 28 on the level instrument, and then rotate the fine adjustment screw 32 to make the level instrument accurately aim at the leveling rod in front of it; Step 5: Rotate knob 16 so that the focusing lamp 37 on the leveling rod in front of the level instrument can be clearly seen through the level instrument; at this time, due to the diffraction of light, when the focus is correct, the focusing lamp 37 diffracts three clear rays of light through the focusing plate 29, and the three rays of light converge at the same point; when the focus is not correct, the three rays of light are not clear and do not converge at the same point; (this principle is common knowledge in this field and will not be elaborated further). Step 6: Read the distance scale corresponding to the distance reading dial 24 pointed to by the tip of pointer 25. The reading value is the distance between the level instrument and the leveling rod located in front of it. Step 7: Rotate the level 180°; Step 8: Repeat steps 4 through 6; Step 9: The first reading is the foresight distance, and the second reading is the backsight distance. If the foresight distance or backsight distance does not meet the measurement specifications, or if the difference between the foresight distance and backsight distance does not meet the measurement specifications, readjust the position of the level or leveling rod, and repeat steps 4 to 6 and / or steps 7 to 8, so that the foresight distance, backsight distance, and the difference between the foresight distance and backsight distance all meet the measurement specifications. Step 10: The current sight distance, backsight distance, and the difference between the foresight and backsight distances all meet the measurement specifications. Remove the focusing plate 29 and read the corresponding readings of the digital scales 36 on the two leveling rods aligned with the middle crosshair on the crosshair reticle 27. Calculate the elevation difference.

[0033] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, equivalent substitutions, and improvements made by those skilled in the art to the above embodiments without departing from the scope of the technical solution of the present invention, based on the technical essence of the present invention, shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. A leveling measuring device with rapid distance measurement function, comprising: A level and a leveling rod, wherein the level includes a focusing assembly with a drive shaft (14), and the level is focused by rotating the drive shaft (14). The level measuring device further includes a distance reading dial (24) and a gear transmission assembly. The distance reading dial (24) is mounted on the level. The power input end and power output end of the gear transmission assembly are connected to the drive shaft (14) and the distance reading dial (24) respectively. When the drive shaft (14) rotates, the drive shaft (14) drives the distance reading dial (24) to rotate through the gear transmission assembly. When the level is focused by rotating the drive shaft (14), the distance between the level and the leveling rod in front of it can be directly read through the distance reading dial (24).

2. A leveling measuring device with rapid distance measurement function according to claim 1, characterized in that: The level instrument also includes: a level instrument body and a concave lens. The level instrument body is a shell structure that runs through the front and back. The concave lens is slidably installed inside the level instrument body. The focusing assembly also includes: a rack (12), a cylindrical gear (13), and a knob (16). The rack (12) is fixedly connected to the right end of the outer wall of the concave lens. The cylindrical gear (13) meshes with the rack (12) and can drive the rack (12) to move the concave lens back and forth. The cylindrical gear (13) is coaxially fixedly connected to one end of a drive shaft (14). The drive shaft (14) passes through and is rotatably connected to the right side wall of the level instrument body. The other end of the drive shaft (14) is coaxially fixedly connected to a knob (16).

3. A leveling measuring device with rapid distance measurement function according to claim 2, characterized in that: The gear transmission assembly includes: cylindrical gear two (17), cylindrical gear three (18), cylindrical gear four (19), cylindrical gear five (20), connecting shaft one (21), connecting shaft two (22), and connecting shaft three (23). Cylindrical gear two (17) is coaxially fixedly connected to the drive shaft (14). Cylindrical gear two (17), cylindrical gear three (18), cylindrical gear four (19), and cylindrical gear five (20) mesh sequentially. Cylindrical gear three (18), cylindrical gear four (19), and cylindrical gear five (20) mesh sequentially. 8) Cylindrical gear four (19) and cylindrical gear five (20) are rotatably mounted on the inner right side of the level instrument body via connecting shaft one (21), connecting shaft two (22) and connecting shaft three (23), respectively; the distance reading dial (24) is disc-shaped and coaxially fixed on cylindrical gear five (20); the top of the level instrument body is provided with a strip hole that penetrates into its inner cavity; the upper part of the distance reading dial (24) passes through the strip hole and exposes the distance scale provided on it.

4. A leveling measuring device with rapid distance measurement function according to claim 3, characterized in that: The leveling device further includes a pointer (25) and a transparent cover (26). The tail end of the pointer (25) is fixedly connected to the middle of the right side wall of the strip hole. The tip of the pointer (25) extends vertically upward out of the strip hole. The distance scale is located at the circumferential edge of the distance reading dial (24) near the pointer (25). The transparent cover (26) covers the top of the strip hole. The tip of the pointer (25) and the upper part of the distance reading dial (24) are both located inside the transparent cover (26).

5. A leveling measuring device with rapid distance measurement function according to claim 2, characterized in that: The level also includes: a slider (9), a slide rail (10) and a baffle (11). The slider (9) is T-shaped. The slide rail (10) is fixedly installed at the bottom center of the inner wall of the level body. The top of the slide rail (10) is provided with a T-shaped groove. The slider (9) is fitted on the slide rail (10) and can slide back and forth along the slide rail (10). Two baffles (11) are symmetrically fixedly installed at the front and rear ends of the slide rail (10). The focusing concave lens includes: a focusing lens tube (7) and a focusing lens (8). The focusing lens (8) is fixedly installed on the inner wall of the focusing lens tube (7). The focusing lens tube (7) is fixedly installed on the top of the slider (9).

6. A leveling measuring device with rapid distance measurement function according to claim 2, characterized in that: The level also includes an eyepiece, a crosshair reticle (27), and an objective lens. The objective lens and the eyepiece are respectively located at the front and rear ends of the level body. The crosshair reticle (27) is located between the eyepiece and the focusing concave lens. The eyepiece, the crosshair reticle (27), the focusing concave lens, and the objective lens are coaxially arranged.

7. A leveling measuring device with rapid distance measurement function according to claim 6, characterized in that: The eyepiece includes an eyepiece tube (3) and an eyepiece lens (4). The eyepiece lens (4) and the crosshair reticle (27) are both fixedly installed on the inner wall of the eyepiece tube (3). The eyepiece tube (3) is fixedly connected to the rear end of the level body. The objective lens includes an objective lens tube (5) and an objective lens (6). The objective lens (6) is fixedly installed on the inner wall of the objective lens tube (5). The objective lens tube (5) is fixedly connected to the front end of the level body.

8. A leveling measuring device with rapid distance measurement function according to claim 6, characterized in that: The leveling device further includes: a focusing plate (29) and fastening bolts (30). Several fastening bolts (30) are provided. The focusing plate (29) is detachably fixed at the outer end port of the objective lens by several fastening bolts (30). Several oblique slits are symmetrically provided on the upper and lower sides of the focusing plate (29). The oblique slits have an inclination angle of 8°~15° relative to the vertical line and a width of 0.5mm~2mm.

9. A leveling measuring device with rapid distance measurement function according to claim 8, characterized in that: The leveling rod includes: a rod body (35), digital scales (36), focusing lamps (37), handrails (38), a circular spirit level (39), and a power supply (40). The front and back sides of the rod body (35) are provided with digital scales (36) for indicating elevation along the height direction. Several focusing lamps (37) are evenly arranged on the front and back sides of the rod body (35) along the height direction. The power supply (40) is provided inside the rod body (35) and supplies power to the several focusing lamps (37). Handrails (38) are provided on both the left and right sides of the rod body (35), and a circular spirit level (39) is also provided on one side of the rod body (35).

10. The method of using a leveling device with rapid distance measurement function according to claim 9, characterized in that: Includes the following steps: Step 1: Position the level instrument and the leveling rod according to the measurement specifications. Fix the level instrument on the tripod and help level it. Keep the leveling rod vertical. Step 2: Turn on the focusing light (37) of the leveling rod; Step 3: Fix the focusing plate (29) onto the objective lens; Step 4: Initially aim at the leveling rod in front of the level instrument, then make fine adjustments to ensure that the level instrument is precisely aimed at the leveling rod in front of it; Step 5: Rotate the knob (16) so that the focusing light (37) on the leveling rod in front of the level instrument can be clearly seen through the level instrument. Step 6: Read the distance between the level instrument and the leveling rod in front of it directly through the distance reading dial (24).

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