Road length measuring instrument

Abstract

The invention relates to a road length measuring instrument, and relates to the technical field of road engineering, the road length measuring instrument comprises a rotating frame, a measuring wheel is rotatably connected to the outer wall of a first rotating shaft, a plurality of light-transmitting grooves arranged in an annular array are formed in the measuring wheel in a penetrating manner, and an infrared emitter is fixedly connected to one side of the inner wall of the rotating frame; an infrared receiver is fixedly connected to the side, away from the infrared emitter, of the inner wall of the rotating frame. Through the arrangement of the measuring wheel, the light transmitting groove, the infrared emitter and the infrared receiver, infrared rays are alternately shielded by the light transmitting groove and the measuring wheel body, the infrared receiver can intermittently receive the infrared rays emitted by the infrared emitter, the infrared rays are converted into electric pulse signals by the infrared receiver, and by recording the number of pulses, the measurement accuracy is improved. And finally, accurate path length data can be calculated, and due to the arrangement of the plurality of light-transmitting grooves, the electric pulse signals are denser, so that the effect of ensuring the precision during path length measurement is achieved.

Description

Technical Field

[0001] This invention relates to the technical field of road engineering, and in particular to a road length measuring instrument. Background Technology

[0002] Whether it's urban roads, rural highways, or the paving of roads within industrial parks, all projects require precise measurement of road length, covering various scenarios such as straight sections, curved sections, and irregular road sections. Furthermore, the measurement process must balance efficiency and portability to adapt to the complex working environment of the project site.

[0003] Currently, most road length measurements in road engineering are done manually using measuring tapes. While this saves costs, it is inefficient, requires multiple people to work together, and is limited by the size of the measuring tape, making it unsuitable for medium- to long-distance road measurements. Furthermore, terrain factors such as road surface bumps, depressions, and slopes can prevent the measuring tape from fully adhering to the ground, leading to measurement errors and hindering efficient road measurement work. Summary of the Invention

[0004] 1. Technical problems to be solved The purpose of this application is to provide a road length measuring instrument to solve the problem that most road length measurement methods currently used in road engineering are manual tape measure methods. Although this can save costs, the measurement efficiency is low, requires multiple people to cooperate, and the length is limited by the tape measure specifications, making it difficult to adapt to medium and long distance road measurements. At the same time, terrain factors such as road surface bumps, depressions, and slopes can cause the tape measure to not fully fit the ground, resulting in measurement errors and making it impossible to efficiently complete road measurement operations.

[0005] The road length measuring instrument provided in this application adopts the following technical solution: A road length measuring instrument includes a rotating frame, a first rotating shaft rotatably connected inside the rotating frame, a measuring wheel rotatably connected to the outer wall of the first rotating shaft, a plurality of light-transmitting slots arranged in a ring array penetrating through the measuring wheel, an infrared emitter fixedly connected to one side of the inner wall of the rotating frame, an infrared receiver fixedly connected to the side of the inner wall of the rotating frame away from the infrared emitter, a bidirectional screw rotatably connected to the upper end inside the rotating frame, the infrared emitter and the infrared receiver corresponding to each other, the measuring wheel rotatably disposed between the infrared emitter and the infrared receiver, clamps threadedly connected to both sides of the outer wall of the bidirectional screw, rubber sheets fixedly connected to one side of each of the two clamps, a handle fixedly connected to one side of the bidirectional screw penetrating the rotating frame, a second rotating shaft fixedly connected to the bottom end of one side of the outer wall of the rotating frame, a plumb bob rotatably connected to the outer wall of the second rotating shaft, a mounting base fixedly connected to one side of the plumb bob, and a laser emitter fixedly connected inside the mounting base.

[0006] By adopting the above technical solution, through the arrangement of the measuring wheel, light-transmitting groove, infrared emitter, and infrared receiver, with the infrared emitter and receiver positioned opposite each other and the measuring wheel located between them, the light-transmitting groove, arranged in a ring array inside the measuring wheel, rotates along with the measuring wheel as it rotates. The infrared emitter continuously emits infrared rays. When the light-transmitting groove rotates to the position between the infrared emitter and receiver, the infrared rays can pass through the light-transmitting groove and be received by the receiver. However, when the physical part of the measuring wheel rotates to the position between the infrared emitter and receiver, the infrared rays are blocked, and the infrared receiver cannot receive the infrared rays emitted by the infrared emitter. As the measuring wheel rotates, the infrared rays are alternately blocked by the light-transmitting groove and the wheel body. The infrared rays continuously switch between the two states of passing through the light-transmitting groove and being blocked by the wheel body. The infrared receiver intermittently receives the infrared rays emitted by the infrared emitter and converts them into electrical pulse signals. Each electrical pulse signal... The number corresponds to a specific angle of rotation of the measuring wheel. By recording the number of pulses, the rotation angle of the measuring wheel is determined. Based on the specific circumference of the measuring wheel, accurate road length data can be calculated. Due to the setting of multiple light-transmitting slots, the electrical pulse signal is more concentrated, thus ensuring the accuracy of road length measurement. The rotating frame provides a mounting base for the measuring wheel. The first rotating shaft allows the measuring wheel to rotate flexibly. When the measuring wheel rolls, it can keep in contact with the road surface for road length detection. After the measurement is completed, the throttle can be turned to drive the bidirectional screw to rotate. When the bidirectional screw rotates, it drives the clamps on both sides to move closer together. The rubber sheets on the clamps can hold and fix the measuring wheel, preventing the measuring wheel from rotating unexpectedly after the measurement and causing measurement errors. The second rotating shaft allows the plumb bob to rotate freely and always point to the ground. The mounting base on one side of the plumb bob fixes the laser emitter. The laser emitter can emit laser to help determine the measurement start and end points, reduce positioning deviations during measurement, and make the road length measurement results more accurate and reliable.

[0007] Preferably, a first rotating seat is fixedly connected to the upper end of the rotating frame, a support rod is rotatably connected to one side of the first rotating seat by bolts, a second rotating seat is fixedly connected to the bottom end of the support rod, an adjusting rod is rotatably connected to one side of the second rotating seat by bolts, a third rotating seat is fixedly connected to the bottom end of the adjusting rod, and an auxiliary wheel is rotatably connected inside the third rotating seat.

[0008] By adopting the above technical solution, the first rotating seat at the upper end of the rotating frame is connected to the support rod by bolts, allowing the support rod to flexibly adjust its angle. The second rotating seat at the bottom end of the support rod is connected to the adjusting rod by bolts, allowing the adjusting rod to rotate freely. The third rotating seat at the bottom of the adjusting rod provides a mounting base for the auxiliary wheel, ensuring stable rotation of the auxiliary wheel. During use, the angles of the support rod and the adjusting rod can be changed by loosening the bolts at the first and second rotating seats. After adjustment, the bolts are tightened to fix the angles of the support rod and the adjusting rod, allowing the auxiliary wheel to fit more closely to the road surface. Furthermore, the width of the auxiliary wheel is greater than the width of the measuring wheel, providing stable support for the entire measuring instrument and preventing the device from tilting or shaking during measurement. This ensures that the measuring wheel can roll smoothly, thereby improving the accuracy of road length measurement.

[0009] Preferably, a handle frame is fixedly connected to the end of the support rod away from the first rotating seat, a support column is fixedly connected to the upper end of the handle frame, a controller is fixedly connected to the upper end of the support column, a light shield is fixedly connected to the upper end of the controller, and a push handle is fixedly connected inside the handle frame.

[0010] By adopting the above technical solution, a handle frame is fixed at the end of the support rod away from the first rotating seat. The support column at the upper end of the handle frame is used to fix the controller, and a sunshade is set at the upper end of the controller to block sunlight. The push handle fixed inside the handle frame makes it convenient for the user to hold and push the entire measuring instrument to move.

[0011] Preferably, a battery box is fixedly connected to the upper end of the support rod, a storage battery is installed inside the battery box, and multiple power indicator lights arranged in a linear array are provided on one side of the surface of the battery box.

[0012] By adopting the above technical solution, the battery box fixed at the upper end of the support rod contains a storage battery, which provides power to the entire measuring instrument. The power indicator light on the surface of the battery box can intuitively reflect the remaining power of the storage battery. Before use, the power indicator light can be used to check whether the power is sufficient, so as to avoid the device suddenly stopping working due to power depletion during the measurement process, ensuring that the measurement task can be carried out continuously and smoothly, and reducing measurement interruptions or data errors caused by power failure.

[0013] Preferably, two fourth rotating seats arranged in a mirror image are fixedly connected to one side of the rotating frame, and a support frame is rotatably connected inside the two fourth rotating seats. A gripper is fixedly connected to the upper end of one side of the rotating frame, and the end of the support frame away from the fourth rotating seat is engaged inside the gripper.

[0014] By adopting the above technical solution, two mirror-distributed fourth rotating seats are set on one side of the rotating frame, and the support frame is rotatably connected inside. The jaws on the upper end of one side of the rotating frame can engage with the end of the support frame away from the fourth rotating seats. When a temporary measurement is required or the measurement is completed, the support frame can be rotated to unfold it, providing additional support for the device. With the addition of wide auxiliary wheels, the stability during placement can be enhanced, allowing the measuring instrument to stand in a stopped position. When in use, the support frame can be rotated into the jaws, allowing the device to roll and be used normally.

[0015] Preferably, the controller has a plurality of operation buttons arranged in a linear array on one side of its upper end, and a display screen is provided on the upper end of the controller.

[0016] By adopting the above technical solution, the multiple operation buttons on the upper side of the controller allow operators to quickly start and stop measurements, switch distance modes, and display past data recorded by the controller. The display screen on the upper side of the controller can display the measured road length data in real time. During use, various operation commands can be easily completed by pressing the operation buttons. At the same time, the display screen can intuitively present the measurement results, allowing operators to keep track of the measurement progress and data status at any time, avoiding manual calculations and improving measurement efficiency and the convenience of data reading.

[0017] Preferably, each of the two fourth rotating seats is fixedly connected to one side with four support plates arranged in a circular array. Each of the multiple support plates is fixedly connected to a fixing plate on the side away from the fourth rotating seat in groups of four. Each of the two fixing plates is fixedly connected to one side with a spring. Each of the two springs is fixedly connected to a fixing pin on the end away from the fixing plate. Both fixing pins pass through the fourth rotating seat. Fixing holes are provided on both sides of the support frame.

[0018] By adopting the above technical solution, each of the two fourth rotating seats has a fixed plate fixed on one side by four support plates. The spring on one side of the fixed plate will apply a pushing force to the fixing pin, allowing the fixing pin to pass through the fourth rotating seat. When the rotating support frame is adjusted to a specific angle, the fixing pin will be locked into the corresponding fixing holes on both sides of the support frame under the action of the spring, thereby fixing the angle of the support frame and preventing the support frame from rotating unexpectedly during the support process, thus ensuring the reliability of the support.

[0019] Preferably, the two fixing pins are slidably disposed inside the fixing hole.

[0020] By adopting the above technical solution, when the angle of the support frame is adjusted, the fixing pin can be accurately engaged in the fixing hole as the support frame rotates. After the adjustment is in place, the support frame is fixed by the cooperation between the fixing pin and the fixing hole, ensuring that the support frame will not loosen during the support process, making the entire device more stable.

[0021] Preferably, the outer wall of the measuring wheel is fixedly connected with anti-slip rubber, and the measuring wheel is rotatably disposed between two clamping plates.

[0022] By adopting the above technical solution, the anti-slip rubber on the outer wall of the measuring wheel can increase the friction with the ground and reduce slippage during measurement. At the same time, the measuring wheel is rotated between two clamping plates. When the clamping plates are close together, they can hold the measuring wheel and restrict its rotation, thus preventing the measuring wheel from rotating unexpectedly after the measurement is completed.

[0023] Preferably, the controller is electrically connected to the infrared transmitter, the infrared receiver, the laser transmitter, and the battery box, respectively.

[0024] By adopting the above technical solution, the controller is electrically connected to the infrared transmitter, infrared receiver, laser transmitter and battery box respectively. The battery in the battery box powers the infrared transmitter, infrared receiver and laser transmitter. At the same time, the controller can receive the signal from the infrared receiver and process it, convert it into path length data and display it on the display screen. The laser transmitter on the mounting base can be turned on by the button of the controller, so that the laser transmitter can be turned on or off as needed for auxiliary positioning.

[0025] 2. Beneficial effects In summary, this application includes at least one of the following beneficial technical effects: 1. This invention provides a road length measuring instrument. Through the arrangement of a measuring wheel, light-transmitting slots, an infrared transmitter, and an infrared receiver, multiple light-transmitting slots inside the measuring wheel rotate together during its rotation. The infrared transmitter and receiver are positioned opposite each other, with the measuring wheel located between them. The infrared transmitter continuously emits infrared rays. When the light-transmitting slot rotates between the transmitter and receiver, the infrared rays can pass smoothly through the slot and be received by the receiver. When the main body of the measuring wheel rotates between the transmitter and receiver, the infrared rays are blocked, and the receiver cannot receive them. As the measuring wheel rotates, the infrared rays alternately block or penetrate between the main body of the wheel and the light-transmitting slots, and are subsequently received by the receiver and converted into electrical pulse signals. Each electrical pulse signal corresponds to a specific angle of rotation of the measuring wheel. Combined with the circumference of the measuring wheel, the corresponding road length can be accurately calculated by the controller. The multiple light-transmitting slots make the electrical pulse signals more concentrated, further improving the accuracy of road length measurement.

[0026] 2. This invention provides a road length measuring instrument. Through the arrangement of a bidirectional screw, clamping plates, a throttle, a plumb bob, a mounting base, and a laser emitter, after measurement, rotating the throttle drives the bidirectional screw to rotate. When the bidirectional screw rotates, it drives the clamping plates on both sides to move closer together. The rubber sheets on the clamping plates prevent damage to the measuring wheel during clamping and enhance stability, thus fixing the measuring wheel in place and preventing accidental rotation after measurement, which could lead to measurement errors. Simultaneously, a second rotating shaft allows the plumb bob to rotate freely and always point towards the ground. A laser emitter is installed inside the mounting base on one side of the plumb bob. The laser emitter emits laser light to help the operator determine the starting and ending points of the measurement, reducing positioning deviations during measurement and making the road length measurement results more accurate and reliable.

[0027] 3. This invention provides a road length measuring instrument. Through the arrangement of a first rotating seat, a support rod, a second rotating seat, an adjusting rod, a third rotating seat, and an auxiliary wheel, the first rotating seat at the upper end of the rotating frame is connected to the support rod by bolts. Loosening the bolts allows for flexible adjustment of the support rod's angle. After adjustment, tightening the bolts fixes the support rod's position. The second rotating seat at the bottom end of the support rod is connected to the adjusting rod by bolts, allowing the adjusting rod to rotate freely to adjust its angle. After adjustment, tightening the bolts fixes the angle of the adjusting rod. During use, the angles of the support rod and the adjusting rod are changed by adjusting the bolts at the first and second rotating seats according to the road conditions, making the operation of the device more comfortable for the operator. The auxiliary wheel and the measuring wheel cooperate to conform to the road surface. The wider auxiliary wheel provides stable support for the entire measuring instrument, preventing tilting or shaking during measurement and ensuring smooth rolling of the measuring wheel, thereby further improving the accuracy of road length measurement. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the measuring wheel structure of the present invention; Figure 3 This is a schematic diagram of the rotating frame structure of the present invention; Figure 4 This is a schematic diagram of the support rod adjustment structure of the present invention; Figure 5 This is a schematic diagram of the mounting structure of the measuring wheel of the present invention; Figure 6 This is a front view of the rotating frame structure of the present invention; Figure 7 for Figure 6 Enlarged view of point A in the middle; Figure 8 This is a schematic diagram of the unfolded support frame structure of the present invention; Figure 9 This is a schematic diagram of the controller structure of the present invention.

[0029] The components include: 1. Rotating frame; 2. First rotating shaft; 3. Measuring wheel; 4. Light-transmitting groove; 5. Anti-slip rubber; 6. Infrared emitter; 7. Infrared receiver; 8. Bidirectional screw; 9. Clamping plate; 10. Rubber sheet; 11. Rotary handle; 12. Second rotating shaft; 13. Plumb bob; 14. Mounting base; 15. Laser emitter; 16. First rotating seat; 17. Support rod; 18. Second rotating seat; 19. Adjusting rod; 20. Third rotating seat. 21. Auxiliary wheel; 22. Handle bracket; 23. Support column; 24. Controller; 2401. Operation button; 2402. Display screen; 25. Sunshade; 26. Push handle; 27. Battery box; 28. Battery; 29. ​​Power indicator light; 30. Fourth rotating seat; 3001. Support plate; 3002. Fixing plate; 3003. Spring; 3004. Fixing pin; 31. Support frame; 3101. Fixing hole; 32. Gripper. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1 - Appendix Figure 9 This application will be described in further detail below.

[0031] Example 1: A road length measuring instrument, referring to Figure 1 , Figure 2 and Figure 3The system includes a rotating frame 1, with a first rotating shaft 2 rotatably connected inside the frame 1. A measuring wheel 3 is rotatably connected to the outer wall of the first rotating shaft 2. The rotating frame 1 provides a mounting base for the measuring wheel 3, and the first rotating shaft 2 allows the measuring wheel 3 to rotate flexibly. When the measuring wheel 3 rolls, it can conform to the road surface for road length detection. Multiple light-transmitting slots 4 arranged in a circular array are perforated inside the measuring wheel 3. Due to the arrangement of multiple light-transmitting slots 4, the electrical pulse signal is more concentrated, thus ensuring the accuracy of road length measurement. An infrared emitter 6 is fixedly connected to one side of the inner wall of the rotating frame 1 for emitting infrared rays. An infrared receiver 7 is fixedly connected to the side of the inner wall of the rotating frame 1 away from the infrared emitter 6 for receiving infrared rays. The infrared radiation emitted by the infrared receiver 7 is rotatably connected to the upper part of the rotating frame 1 by a bidirectional screw 8. The infrared transmitter 6 and the infrared receiver 7 correspond to each other. The measuring wheel 3 is rotatably positioned between the infrared transmitter 6 and the infrared receiver 7. When the measuring wheel 3 rotates, the light-transmitting grooves 4 arranged in a ring inside it rotate together. The infrared transmitter 6 continuously emits infrared radiation. When the light-transmitting groove 4 rotates between the infrared transmitter 6 and the infrared receiver 7, the infrared radiation can pass through the light-transmitting groove 4 and be received by the receiver. However, when the solid part of the measuring wheel 3 rotates between the infrared transmitter 6 and the infrared receiver 7, the infrared radiation is blocked. At this time, the infrared receiver 7 cannot receive the infrared radiation emitted by the infrared transmitter 6. As the measuring wheel 3 rotates, the infrared radiation passes through the light-transmitting groove 4 and is received by the receiver. The light groove 4 and the measuring wheel 3 alternately block infrared light, continuously switching between the states of infrared light passing through the light groove 4 and being blocked by the wheel. The infrared receiver 7 intermittently receives the infrared light emitted by the infrared transmitter 6, which is converted into electrical pulse signals. Each electrical pulse signal corresponds to a specific angle of rotation of the measuring wheel 3. By recording the number of pulses, the rotation angle of the measuring wheel 3 is determined. By measuring the specific circumference of the measuring wheel 3, the accurate path length data can be calculated. Both sides of the outer wall of the bidirectional screw 8 are threaded with clamping plates 9. Rubber sheets 10 are fixedly connected to one side of each clamping plate 9. A handle 11 is fixedly connected to one side of the bidirectional screw 8 that passes through the rotating frame 1. After the measurement is completed, the handle 11 can be rotated to drive the bidirectional screw 8. When the bidirectional screw 8 rotates, it drives the clamping plates 9 on both sides to move closer to each other. The rubber sheet 10 on the clamping plate 9 can hold and fix the measuring wheel 3, preventing the measuring wheel 3 from rotating accidentally after the measurement is completed, which would cause measurement errors. A second rotating shaft 12 is fixedly connected to the bottom of one side of the outer wall of the rotating frame 1. A plumb bob 13 is rotatably connected to the outer wall of the second rotating shaft 12. A mounting base 14 is fixedly connected to one side of the plumb bob 13. A laser emitter 15 is fixedly connected inside the mounting base 14. The second rotating shaft 12 allows the plumb bob 13 to rotate freely and always point to the ground. The mounting base 14 on one side of the plumb bob 13 fixes the laser emitter 15. The laser emitter 15 can emit laser to assist in determining the starting point and ending point of the measurement, reduce the positioning deviation during the measurement, and make the road length measurement results more accurate and reliable.

[0032] Example 2: A road length measuring instrument, referring to Figure 4 and Figure 9 A first rotating seat 16 is fixedly connected to the upper end of the rotating frame 1. A support rod 17 is rotatably connected to one side of the first rotating seat 16 via bolts. A second rotating seat 18 is fixedly connected to the bottom end of the support rod 17. An adjusting rod 19 is rotatably connected to one side of the second rotating seat 18 via bolts. A third rotating seat 20 is fixedly connected to the bottom end of the adjusting rod 19. An auxiliary wheel 21 is rotatably connected inside the third rotating seat 20. The first rotating seat 16 at the upper end of the rotating frame 1 is connected to the support rod 17 via bolts, allowing the support rod 17 to flexibly adjust its angle. The second rotating seat 18 at the bottom end of the support rod 17 is connected to the adjusting rod 19 via bolts, allowing the adjusting rod 19 to rotate freely. The third rotating seat 20 at the bottom of the adjusting rod 19 provides a mounting base for the auxiliary wheel 21, allowing it to rotate stably. During use, the angles of the support rod 17 and the adjusting rod 19 can be changed by loosening the bolts at the first rotating seat 16 and the second rotating seat 18. After adjustment, the bolts are tightened to fix the angles of the support rod 17 and the adjusting rod 19, allowing the auxiliary wheel 21 to better contact the road surface with the measuring wheel 3. Furthermore, the width of the auxiliary wheel 21 is greater than the width of the measuring wheel 3, providing stable support for the entire measuring instrument and preventing tilting or shaking during measurement. This ensures the measuring wheel 3 rolls smoothly, thereby improving the accuracy of road length measurement. A handle frame 22 is fixedly connected to the end of the support rod 17 away from the first rotating seat 16. A support column 23 is fixedly connected to the upper end of the handle frame 22. A controller 24 is fixedly connected to the upper end of the support column 23. A sunshade 25 is fixedly connected to the upper end of the controller 24. A push handle 26 is fixedly connected inside the handle frame 22. The support column 23 at the upper end of the handle frame 22 is used to fix the controller 24. The sunshade 25 at the upper end of the controller 24 is used to block sunlight. The push handle 26 fixed inside the handle frame 22 makes it convenient for the user to hold and push the entire measuring instrument to move. A battery box 27 is fixedly connected to the end of the support rod 17. The battery box 27 contains a storage battery 28. Multiple power indicator lights 29 arranged in a linear array are provided on one side of the surface of the battery box 27. The battery box 27, which is fixed to the upper end of the support rod 17, contains the storage battery 28. The storage battery 28 provides power to the entire measuring instrument. The power indicator lights 29 on the surface of the battery box 27 can intuitively reflect the remaining power of the storage battery 28. Before use, the power can be checked through the power indicator lights 29 to see if the power is sufficient, so as to avoid the device suddenly stopping work due to power depletion during the measurement process, and ensure that the measurement task can be carried out continuously and smoothly, reducing measurement interruption or data error caused by power failure.

[0033] Reference Figure 3 , Figure 4 and Figure 8Two mirror-distributed fourth rotating seats 30 are fixedly connected to one side of the rotating frame 1. A support frame 31 is rotatably connected inside the two fourth rotating seats 30. A gripper 32 is fixedly connected to the upper end of one side of the rotating frame 1. The end of the support frame 31 away from the fourth rotating seats 30 is engaged inside the gripper 32. The two mirror-distributed fourth rotating seats 30 on one side of the rotating frame 1 are rotatably connected to the support frame 31. The gripper 32 at the upper end of one side of the rotating frame 1 can engage with the end of the support frame 31 away from the fourth rotating seats 30. When a temporary measurement is required or the measurement is completed, the support frame 31 can be rotated to unfold it, providing additional support for the device. With the wide auxiliary wheel 21, the stability during placement can be enhanced, allowing the measuring instrument to stand in a stopped position. When in use, the support frame 31 can be rotated into the gripper 32, allowing the device to roll and be used normally.

[0034] Reference Figure 7 , Figure 8 and Figure 9The controller 24 has multiple operation buttons 2401 arranged in a linear array on one side of its upper end. A display screen 2402 is also located on the upper end of the controller 24. The operation buttons 2401 allow operators to quickly start and stop measurements, switch distance modes, and display past data recorded by the controller 24. The display screen 2402 on the upper end of the controller 24 displays the measured path length data in real time. During use, various operation commands can be easily completed by pressing the operation buttons 2401. Simultaneously, the display screen 2402 provides a clear view of the measurement results, allowing operators to monitor the measurement progress and data status at any time, avoiding manual calculations and improving measurement efficiency and data reading convenience. Four support plates 3001 arranged in a circular array are fixedly connected to one side of each of the two fourth rotating seats 30. Each of the support plates 3001, grouped in fours, has a fixed plate 3002 fixedly connected to the side furthest from the fourth rotating seat 30. Springs 3003 are fixedly connected to one side of each of the two fixed plates 3002, and fixing pins 3004 are fixedly connected to the ends of each of the two springs 3003 furthest from the fixed plates 3002. Both fixing pins 3004 pass through the fourth rotating seat 30. Fixing holes 3101 are provided on both sides of the support frame 31. Fixing plates 3002 are fixed to one side of each of the two fourth rotating seats 30 via four support plates 3001. Springs 3003 on one side of the fixing plates 3002 apply a pushing force to the fixing pins 3004, allowing them to pass through the fourth rotating seat 30. When the support frame 31 is rotated to adjust a specific angle, the fixing pins 3004, under the action of the springs 3003, will engage with the corresponding fixing holes 3101 on both sides of the support frame 31. This fixes the angle of the support frame 31, preventing it from rotating unexpectedly during the support process and ensuring the reliability of the support. The two fixing pins 3004 are slidably set inside the fixing holes 3101. When the angle of the support frame 31 is adjusted, the fixing pins 3004 can be precisely engaged in the fixing holes 3101 as the support frame 31 rotates. After the adjustment is in place, the support frame 31 is fixed by the cooperation between the fixing pins 3004 and the fixing holes 3101, ensuring that the support frame 31 will not loosen during the support process and making the entire device more stable.

[0035] Reference Figure 3 , Figure 5 and Figure 6 The outer wall of the measuring wheel 3 is fixedly connected with anti-slip rubber 5. The measuring wheel 3 is rotatably set between two clamping plates 9. The anti-slip rubber 5 on the outer wall of the measuring wheel 3 can increase the friction with the ground and reduce slippage during measurement. At the same time, the measuring wheel 3 is rotatably set between two clamping plates 9. When the clamping plates 9 are close, they can clamp the measuring wheel 3 to restrict its rotation and prevent the measuring wheel 3 from rotating accidentally after the measurement is completed.

[0036] Reference Figure 1 , Figure 3 and Figure 4The controller 24 is electrically connected to the infrared transmitter 6, the infrared receiver 7, the laser transmitter 15, and the battery box 27. The battery 28 in the battery box 27 supplies power to the infrared transmitter 6, the infrared receiver 7, and the laser transmitter 15. At the same time, the controller 24 can receive and process the signal from the infrared receiver 7, convert it into path length data, and display it on the display screen 2402. The laser transmitter 15 on the mounting base 14 can be turned on or off by the button on the controller 24, so that the laser transmitter 15 can be turned on or off as needed for auxiliary positioning.

[0037] The implementation principle of this application embodiment is as follows: When in use, first check the power indicator light 29 on the surface of the battery box 27 to ensure that the power is sufficient to ensure that the measurement can be carried out smoothly. According to the road conditions, loosen the bolt at the first rotating seat 16 to adjust the angle of the support rod 17, loosen the bolt at the second rotating seat 18 to adjust the angle of the rod 19, and tighten the bolt after adjustment to fix the angle of the support rod 17 and the adjusting rod 19, so that the auxiliary wheel 21 and the measuring wheel 3 are in contact with the road surface. The wider auxiliary wheel 21 provides stable support for the device and prevents tilting and shaking during measurement. After preparation, the device is activated via the operation button 2401 on the controller 24. The plumb bob 13, under the action of the second rotating shaft 12, always points towards the ground. The laser emitter 15 inside the mounting base 14 emits a laser to help accurately mark the measurement starting point and reduce positioning deviation. During measurement, the operator pushes the device by holding the push handle 26 inside the handle frame 22. The anti-slip rubber 5 on the outer wall of the measuring wheel 3 contacts the ground, increasing friction and preventing slippage. Since the measuring wheel 3 is positioned between the infrared emitter 6 and the infrared receiver 7, its internal annular array of light-transmitting grooves 4 rotates synchronously with the wheel. When the light-transmitting groove 4 rotates between the infrared emitter 6 and the infrared receiver 7, infrared rays pass smoothly through the light-transmitting groove 4 and are received by the infrared receiver 7. When the solid part of the measuring wheel 3 is blocked, the infrared rays will not be blocked. The infrared light received by the infrared receiver 7 is alternately received by the infrared receiver 7 and converted into dense electrical pulse signals. After receiving these signals, the controller 24 calculates the measurement wheel circumference in conjunction with the measurement wheel 3 and displays the result on the display screen 2402 in real time. The sunshade 25 can block sunlight to ensure that the screen is clearly visible. After the measurement is completed, the throttle 11 is turned to drive the bidirectional screw 8 to rotate, which drives the two clamping plates 9 to move closer to each other. The rubber sheet 10 on the clamping plate 9 can clamp the measurement wheel 3 and fix it to prevent data errors caused by accidental rotation of the measurement wheel 3. At this time, the final data on the display screen 2402 can be directly read as the road length measurement result. Throughout the process, the controller 24 maintains an electrical connection with the infrared transmitter 6, infrared receiver 7, laser transmitter 15 and battery box 27 to realize power supply, signal processing and data conversion, and ensure accurate and efficient measurement. When temporarily stopped, rotate the support frame 31 inside the fourth rotating seat 30 to disengage the support frame 31 from the gripper 32. During the rotation, the spring 3003 on one side of the fixing plate 3002 will push the fixing pin 3004 through the fourth rotating seat 30. When the support frame 31 is rotated to the appropriate angle, the fixing pin 3004 will be engaged in the fixing hole 3101 of the support frame 31 to fix the angle of the support frame 31. When measurement is required, rotate the support frame 31 in the opposite direction into the gripper 32 to fix the position of the support frame 31 and avoid affecting the normal use of the device.

Claims

1. A road length measuring instrument, comprising a rotating frame (1), characterized in that: The rotating frame (1) is rotatably connected to a first rotating shaft (2), and a measuring wheel (3) is rotatably connected to the outer wall of the first rotating shaft (2). The measuring wheel (3) has multiple light-transmitting slots (4) arranged in a ring array inside. An infrared emitter (6) is fixedly connected to one side of the inner wall of the rotating frame (1), and an infrared receiver (7) is fixedly connected to the side of the inner wall of the rotating frame (1) away from the infrared emitter (6). A bidirectional screw (8) is rotatably connected to the upper end of the rotating frame (1). The infrared emitter (6) and the infrared receiver (7) correspond to each other. The measuring wheel (3) is rotatably set. Between the infrared transmitter (6) and the infrared receiver (7), the two sides of the outer wall of the bidirectional screw (8) are threaded with clamps (9), and rubber sheets (10) are fixedly connected to one side of each clamp (9). The bidirectional screw (8) passes through the rotating frame (1) and is fixedly connected with a throttle (11). The bottom of the outer wall of the rotating frame (1) is fixedly connected with a second rotating shaft (12). The outer wall of the second rotating shaft (12) is rotatably connected with a plumb bob (13). The plumb bob (13) is fixedly connected to one side of a mounting base (14). The mounting base (14) is fixedly connected with a laser transmitter (15).

2. The road length measuring instrument according to claim 1, characterized in that: The upper end of the rotating frame (1) is fixedly connected to a first rotating seat (16). A support rod (17) is rotatably connected to one side of the first rotating seat (16) by bolts. A second rotating seat (18) is fixedly connected to the bottom end of the support rod (17). An adjusting rod (19) is rotatably connected to one side of the second rotating seat (18) by bolts. A third rotating seat (20) is fixedly connected to the bottom end of the adjusting rod (19). An auxiliary wheel (21) is rotatably connected inside the third rotating seat (20).

3. A road length measuring instrument according to claim 2, characterized in that: The support rod (17) is fixedly connected to a handle frame (22) at the end away from the first rotating seat (16). The upper end of the handle frame (22) is fixedly connected to a support column (23). The upper end of the support column (23) is fixedly connected to a controller (24). The upper end of the controller (24) is fixedly connected to a light shield (25). The handle frame (22) is fixedly connected to a push handle (26).

4. A road length measuring instrument according to claim 2, characterized in that: The upper end of the support rod (17) is fixedly connected to a battery box (27), and a storage battery (28) is installed inside the battery box (27). Multiple power indicator lights (29) arranged in a linear array are provided on one side of the surface of the battery box (27).

5. A road length measuring instrument according to claim 1, characterized in that: Two fourth rotating seats (30) arranged in a mirror image are fixedly connected to one side of the rotating frame (1). A support frame (31) is rotatably connected inside the two fourth rotating seats (30). A gripper (32) is fixedly connected to the upper end of one side of the rotating frame (1). The end of the support frame (31) away from the fourth rotating seat (30) is engaged inside the gripper (32).

6. A road length measuring instrument according to claim 3, characterized in that: The controller (24) has multiple operation buttons (2401) arranged in a linear array on one side of its upper end, and a display screen (2402) is provided on the upper end of the controller (24).

7. A road length measuring instrument according to claim 5, characterized in that: Four support plates (3001) arranged in a circular array are fixedly connected to one side of each of the two fourth rotating seats (30). Each of the support plates (3001) is fixedly connected to a fixing plate (3002) on the side away from the fourth rotating seat (30) in groups of four. Each of the two fixing plates (3002) is fixedly connected to a spring (3003) on one side. Each of the two springs (3003) is fixedly connected to a fixing pin (3004) at the end away from the fixing plate (3002). Both fixing pins (3004) pass through the fourth rotating seat (30). Fixing holes (3101) are opened on both sides of the support frame (31).

8. A road length measuring instrument according to claim 7, characterized in that: The two fixing pins (3004) are slidably disposed inside the fixing hole (3101).

9. A road length measuring instrument according to claim 1, characterized in that: The outer wall of the measuring wheel (3) is fixedly connected with anti-slip rubber (5), and the measuring wheel (3) is rotatably set between two clamps (9).

10. A road length measuring instrument according to claim 3, characterized in that: The controller (24) is electrically connected to the infrared transmitter (6), the infrared receiver (7), the laser transmitter (15), and the battery box (27), respectively.

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