CN213625122U - Road surface flatness measuring instrument - Google Patents
Road surface flatness measuring instrument Download PDFInfo
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- CN213625122U CN213625122U CN202022005350.0U CN202022005350U CN213625122U CN 213625122 U CN213625122 U CN 213625122U CN 202022005350 U CN202022005350 U CN 202022005350U CN 213625122 U CN213625122 U CN 213625122U
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- transmission rod
- road surface
- measuring instrument
- rack
- flatness measuring
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Abstract
The utility model relates to a highway pavement flatness measuring apparatu, including the portal frame, can follow vertical direction reciprocating motion's slide rule board, distribute the transfer line on the slide rule board, install on the slide rule board and with the displacement encoder of transfer line one-to-one's compression spring and rotation type, reach the signal processing unit who is connected with displacement encoder. The axis of the transmission rod is along the vertical direction, one end of the pressure spring is matched with the upper end of the transmission rod, the lower end of the transmission rod extends outwards relative to the sliding ruler plate, and the section extending outwards can be partially retracted into the sliding ruler plate. The upper end of the transmission rod is provided with a rack arranged along the vertical direction, the rack is matched with the displacement encoder through the gear transmission unit, the vertical displacement variable of the transmission rod is transmitted to the displacement encoder, and finally the required digital signal is processed and output by the signal processing unit. This patent scheme can improve measurement accuracy to a certain extent when measuring highway road surface roughness, and this measuring apparatu simple structure uses convenient operation, measurement fast moreover.
Description
Technical Field
The utility model relates to a highway road surface detection device field specifically is a device that can be used for measuring highway road surface roughness.
Background
In the evaluation of the road surface performance of a highway, the flatness of the road surface is an important index. In order to conveniently evaluate the flatness of the road surface, a road flatness detection device is designed, most of the devices are provided with a laser sensor at the bottom of a vehicle, and the laser sensor senses the distance between the vehicle and the ground to detect the flatness of the road surface. Therefore, the method is not well applicable to some scenes with high requirements on the flatness measurement accuracy (accuracy) of the road surface.
SUMMERY OF THE UTILITY MODEL
For the measurement accuracy of relative improvement to highway road flatness, the utility model provides a highway road flatness measuring apparatu, it can improve the measuring precision to road flatness, simple structure moreover, convenient operation, measurement are fast.
The utility model provides a technical scheme that its technical problem adopted is: a road surface flatness measuring instrument comprises a portal frame, a slide rule plate which is installed on the inner side of the portal frame by adopting a linear rail assembly and can reciprocate along the vertical direction, transmission rods which are alternately distributed on the slide rule plate, pressure springs and rotary displacement encoders which are installed on the slide rule plate and are configured in one-to-one correspondence with the transmission rods, and a signal processing unit which is connected with each displacement encoder; the axis of the transmission rod is vertical, one end of the pressure spring is matched with the upper end of the transmission rod, downward pressure is applied to the transmission rod, the lower end of the transmission rod extends outwards relative to the sliding ruler plate, and a section of the transmission rod extending outwards relative to the sliding ruler plate can be partially retracted into the sliding ruler plate; the upper end of the transmission rod is provided with a rack arranged along the vertical direction; the rack is matched with the displacement encoder through a gear transmission unit, so that the vertical displacement variable of the transmission rod is transmitted to the displacement encoder, and finally, the signal processing unit processes and outputs a required digital signal.
In some embodiments, vertically extending grooves are respectively formed in the vertical arms of the portal frame, flat arms are respectively arranged at two ends, matched with the portal frame, of the slide rule plate, the flat arms extend to the grooves, and a return spring is arranged between the bottom surface of the groove and the flat arms. When external force is applied to drive the slide rule plate to move downwards relative to the portal frame, the reset spring is compressed, and the slide rule plate moves upwards to reset under the action of the reset spring after the external force is removed. Reset spring should have enough big compression space, in order to ensure that the part of the outside one end that extends of the relative slide rule board of transfer line can retract the slide rule board, simultaneously for making reset spring be less hard relatively when compressed, not only require reset spring's elastic coefficient to be a little relatively, and reset spring's radial dimension should not too big yet, and then reset spring is easy to be established into elongated pattern in the appearance, for preventing reset spring from taking place the bending under the stress state this moment, influence normal use, in implementation mode once, can establish the outer tube at the reset spring overcoat, the both ends of this outer tube are fixed on the vallecular cavity, between the terminal surface, and this outer tube is equipped with the bar groove that extends along vertical direction towards one side of flat arm, the flat arm is through the cooperation of the upper end of this bar groove in stretching into the outer tube with reset spring.
In some embodiments, the lower end surface of the transmission rod is spherical. Specifically, the lower end of the transmission rod is conical, and the end of the conical part is spherical.
In some embodiments, the slide rule plate comprises a base plate and a cover plate mounted on an upper end of the base plate; the transmission rods are arranged at intervals along the length direction of the base plate; specifically, the upper end face of the base plate is distributed with stepped through holes corresponding to the transmission rods; the lower end of the transmission rod penetrates through the stepped through hole, the outer wall of the middle upper part of the transmission rod is provided with a shoulder, the shoulder is matched with the shoulder of the stepped through hole to support the transmission rod in the stepped through hole, and the transmission rod is pushed downwards under the action of the pressure spring to enable the shoulder on the transmission rod to be pressed on the shoulder of the stepped through hole; the lower end of the pressure spring is sleeved at the upper end of the transmission rod, and the upper end of the pressure spring is inserted into a hole formed in the cover plate; and an arm seat is arranged on the lower end face of the cover plate, and the displacement encoder and the gear transmission unit are installed on the arm seat. In some embodiments, for convenience of installation and debugging, the arm seat and the cover plate are matched through a linear rail structure, and a position adjusting assembly is arranged on the linear rail structure, specifically, the position adjusting assembly may be a screw rod (the arm seat is equivalent to a sliding block), and drives the arm seat to move towards a direction close to the rack and a direction away from the rack. In some embodiments, three rings are sleeved on the upper side of the shoulder of the transmission rod, the rings arranged on the upper side and the lower side are provided with internal threads, the rack is arranged on the ring in the middle, and the ring arranged on the upper side and the ring arranged on the lower side are matched with the transmission rod in a threaded manner and can move up and down relative to the transmission rod to fix the ring arranged in the middle.
In some embodiments, the cover plate is provided with pre-tightening bolts corresponding to the pressure springs one by one; the cover plate is provided with a threaded hole, the upper end of the pressure spring is inserted into the threaded hole, and the pre-tightening bolt is arranged at the upper end of the threaded hole. The initial compression amount of the pressure spring can be adjusted by screwing the pre-tightening bolt into the threaded hole continuously, so that the pressure applied to the transmission rod by the pressure spring is adjusted.
In some embodiments, the gear transmission unit is a gear set formed by multiple gears, and when the input gear engaged with the rack rotates for one circle, the output gear coaxially arranged with the displacement encoder rotates for N circles, wherein N is greater than 1.
The utility model has the advantages that: use this patent scheme can improve measurement accuracy to a certain extent when measuring highway road surface roughness, and the measuring apparatu that this patent scheme designed simple structure moreover uses convenient operation, measurement fast.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the solution of the patent;
fig. 2 is a partial sectional structure schematic diagram of the scheme of the patent.
In the figure: 1 portal frame, 11 reset springs, 2 slide rule plates, 21 base plates, 22 cover plates, 221 position adjusting assembly, 222 guide posts, 223 flat arms, 3-line rail assembly, 4 transmission rods, 41 racks, 42 shoulders, 43 counter bores, 5 pressure springs, 51 pre-tightening bolts, 6 displacement encoders, 7 signal processing units, 71 display screens and 10 pavement
Detailed Description
The drawings in the specification show the structure, ratio, size, etc. only for the purpose of matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and not for the purpose of limiting the present invention, so the present invention does not have the essential meaning in the art, and any structure modification, ratio relationship change or size adjustment should still fall within the scope covered by the technical content disclosed in the present invention without affecting the function and achievable purpose of the present invention. Meanwhile, the terms "upper", "lower", "front", "rear", "middle", and the like used in the present specification are for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are also considered to be the scope of the present invention without substantial changes in the technical content.
The road surface flatness measuring instrument shown in fig. 1 and 2 comprises a portal frame 1, a sliding ruler plate 2 which is installed on the inner side of a vertical rod of the portal frame 1 by adopting a linear rail assembly 3 and can move in a reciprocating manner along the vertical direction, transmission rods 4 which are alternately distributed on the sliding ruler plate 2, pressure springs 5 and rotary displacement encoders 6 which are installed on the sliding ruler plate 2 and are configured corresponding to the transmission rods 4 one by one, and a signal processing unit 7 which is connected with the displacement encoders 6. The axis of the transmission rod 4 is along the vertical direction, one end of the pressure spring 5 is matched with the upper end of the transmission rod 4, downward pressure is applied to the transmission rod 4, the lower end of the transmission rod 4 extends outwards (downwards) relative to the slide rule plate 2, and a section of the transmission rod 4 extending outwards relative to the slide rule plate 2 can be partially retracted into the slide rule plate 2 (the length of 1/2 of the part of the transmission rod 4 extending downwards relative to the slide rule plate 2 in the state shown in fig. 2 can be set to be retracted into and removed from the slide rule plate 2). The upper end of the transmission rod 4 is provided with a rack 41 arranged in the vertical direction. The rack 41 is matched with the displacement encoder 6 through a gear transmission unit, so that the vertical displacement variable of the transmission rod 4 is transmitted to the displacement encoder 6, and finally, the signal processing unit 7 processes the vertical displacement variable and outputs a required digital signal. The signal processing unit 7 is connected with a display screen 71, and the processed digital information is visually displayed.
As shown in fig. 1, the number of the transmission rods 4 is 3, and in a specific embodiment, the number of the transmission rods can be 5, 8, or more. As shown in fig. 1 and 2, the lower end surface of the transmission rod 4 is a spherical surface. Specifically, the lower end of the transmission rod 4 is conical, and the end of the conical part is spherical.
As an improvement on the portal frame 1, in some embodiments, an elastic layer made of an elastic material such as a rubber material or a polyester material is coated on the lower end face of the vertical rod of the portal frame 1, and when the portal frame 1 is used, downward pressure is applied to the portal frame 1, so that the cross rod is positioned on the horizontal plane as much as possible, and the end parts of the transmission rod in the downward moving process can be positioned on the same horizontal plane as much as possible, thereby further improving the detection accuracy. In order to facilitate observation of whether the cross bar of the portal frame is in a horizontal plane, in some embodiments, a horizontal detector (which is an existing device and is not described in detail) may be further disposed on the cross bar.
As shown in fig. 1, when the measuring instrument according to the present invention is used, a portal frame 1 is placed on a road surface 10, a slide rule plate 2 is pressed downward to move downward relative to the portal frame 1, the end portions of the transmission rods gradually approach the road surface 10 and finally contact the road surface 10, a measurement can be performed after the end portion of the last transmission rod 4 contacts the road surface 10, and at this time, the terminal (display screen) directly outputs the displacement information of the upward movement of each transmission rod 4, so that the height and undulation difference values of the corresponding positions of different transmission rods can be obtained. According to different signal processing modes of a programming program, a measurement can be considered to be completed after the last transmission rod 4 is retracted inwards for a certain length relative to the slide rule plate 2, and the situation that a flatness analysis result is output by a terminal (a display screen) is generally adopted at the moment. In an initial state, the lower end of the transmission rod 4 is retracted upwards for a certain length relative to the lower end of the vertical rod of the portal frame 1, and gradually approaches the road surface 10 when the sliding ruler plate 2 slides downwards along the line rail assembly 3. The slide rule plate 2 and the linear track assembly 3 are normally tightly fitted to form a certain resistance to relative sliding, so that the slide rule plate 2 can be driven to move downwards or upwards relative to the portal frame 1 after the slide rule plate 2 is acted.
When the end of the transmission rod 4 is in contact with the road surface and can no longer move downwards without resistance, as shown in fig. 2, the transmission rod 4 moves inwards relative to (the base plate 21 of) the slide plate 2, so that the rack 41 is driven to move upwards, and then the gear transmission unit inputs a rotation variable to the displacement encoder 6, so as to record the vertical displacement of each transmission rod 4.
A rotary displacement encoder is an optoelectronic rotary measuring device that converts measured angular displacements directly into digital signals (high-speed pulse signals). The principle of the displacement encoder 6 and the principle of processing the received signal variables by the signal processing unit 7 are well known in the art, and are not described in detail herein. The signal processing unit 7 can be provided with a power supply (a power supply module connected with the power supply is arranged in the signal processing unit) or can be externally connected with the power supply. The signal (displayed by the display screen 71) obtained by the final processing may be a plurality of sets (according to the illustrated situation, because three transmission rods are provided, that is, three sets) of displacement amounts of the transmission rod arrangement directions obtained by conversion, and may also be a levelness analysis result obtained by the final processing, and specifically may be selected according to a program set by a programming module (generally, a PLC) provided in the signal processing unit, because the signal may be completed by various existing means, and does not belong to a part that needs to be elaborated in the scheme of this patent.
In view of the fact that the vertical displacement of the transmission rod 4 is not too large during a specific use, in some embodiments, it is preferable that the gear transmission unit is a gear set formed by multiple gears, and when the input gear engaged with the rack 41 rotates for one revolution, the output gear coaxially arranged with the displacement encoder 6 rotates for N revolutions, where N > 1, and N ≧ 5 are preferable.
In order to facilitate the use, vertically extending groove cavities are respectively arranged on the vertical arms of the portal frame 1, flat arms 223 are respectively arranged at the two matched ends of the slide rule plate 2 and the portal frame 1, the flat arms 223 extend to the groove cavities, and return springs 11 are arranged between the bottom surfaces of the groove cavities and the flat arms. When external force is applied to drive the slide rule plate 2 to move downwards relative to the portal frame 1, the return spring 11 is compressed, and the slide rule plate 2 moves upwards to reset under the action of the return spring 11 after the external force is removed. The return spring 11 has a sufficient compression space to ensure that the portion of the drive rod 4 extending out of the slide plate 2 can be retracted into the slide plate 2, meanwhile, in order to make the return spring 11 relatively less laborious when compressed, the elastic coefficient of the return spring is required to be relatively small, and the radial size of the return spring is not suitable to be too large, furthermore, the outer shape of the return spring is easy to be designed into a slender type, and at the moment, in order to prevent the return spring from bending under the stress state and influencing the normal use, in a next embodiment, an outer pipe (the inner diameter of the outer pipe is consistent with or slightly larger than the outer diameter of the return spring) is sleeved outside the return spring, the both ends of this outer tube are fixed between the upper and lower terminal surface of vallecular cavity, and this outer tube is equipped with the bar groove that extends along vertical direction towards one side of flat arm moreover, and the flat arm is through this bar groove stretch into in the outer tube with reset spring upper end cooperation.
Specifically, as shown in fig. 1 and 2, the blade 2 includes a base plate 21 and a cover plate 22 mounted on an upper end of the base plate 21. The transmission levers 4 are provided at intervals in the longitudinal direction (left-right direction) of the base plate 21. The upper end face of the base plate 21 is distributed with stepped through holes corresponding to the transmission rods 4. The lower end of the transmission rod 4 penetrates through the stepped through hole, the outer wall of the middle upper part is provided with a shoulder 42, the shoulder 42 is matched with the shoulder of the stepped through hole to support the transmission rod 4 in the stepped through hole, and the transmission rod 4 is pushed downwards under the action of the pressure spring 5 to enable the shoulder 42 on the transmission rod to be pressed on the shoulder of the stepped through hole. The lower end of the pressure spring 5 is sleeved on the upper end of the transmission rod 4, the upper end of the pressure spring is inserted into a hole formed in the cover plate 22, and when the hole is a threaded hole, the cover plate 22 can be provided with pre-tightening bolts 51 which correspond to the pressure spring 5 one by one. The upper end of the pressure spring 5 is inserted into the threaded hole, and the pre-tightening bolt 51 is arranged at the upper end of the threaded hole. The initial compression of the pressure spring 5 can be adjusted by screwing the pretension bolt 51 into the threaded hole, so that the pressure exerted by the pressure spring 5 on the transmission rod 4 is adjusted. An arm seat is arranged on the lower end face of the cover plate 22, and the displacement encoder 6 and the gear transmission unit are installed on the arm seat. In order to facilitate installation and debugging, the arm base is matched with the cover plate 22 through a linear track structure, and a position adjusting assembly 221 is arranged on the linear track structure, specifically, the position adjusting assembly 221 can be a screw rod (the arm base is equivalent to a sliding block), and drives the arm base to move towards the direction close to the rack (right) and the direction away from the rack (left). In order to conveniently adjust the vertical position of the rack 41, in some embodiments, three circular rings are sleeved on the upper side of the shoulder of the transmission rod 4, the circular rings arranged on the upper side and the lower side are provided with internal threads, the rack 41 is arranged on the circular ring in the middle, the circular ring arranged on the upper side and the circular ring arranged on the lower side are matched with the transmission rod in a threaded manner, the circular ring arranged in the middle can move up and down relative to the transmission rod, the circular ring arranged in the middle is fixed in the middle, and the circular ring is fixed relative to the transmission rod 4. In some embodiments, the portion of the transmission rod 4 opposite the centrally disposed annular ring is a light cylinder. In order to prevent the pressure spring 5 from deviating when the transmission rod 4 moves, a counter bore 43 is arranged on the top surface of the transmission rod, and a guide post 222 corresponding to the counter bore is arranged on the cover plate 2. After assembly, the lower end of the guide post 222 is required to be inserted into the counterbore 43 for a certain length. The guide post 222 is a section that mates with the counterbore 43 and has an outside diameter that corresponds to the diameter of the counterbore 43.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. The present invention can be modified in many ways without departing from the spirit and scope of the present invention, and those skilled in the art can modify or change the embodiments described above without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. Highway road surface roughness measuring apparatu, its characterized in that: the gantry type linear guide rail device comprises a gantry frame, slide rule plates which are arranged on the inner side of the gantry frame through a linear guide rail assembly and can reciprocate in the vertical direction, transmission rods which are distributed on the slide rule plates at intervals, pressure springs and rotary type displacement encoders which are arranged on the slide rule plates and are in one-to-one correspondence with the transmission rods, and signal processing units connected with the displacement encoders;
the axis of the transmission rod is vertical, one end of the pressure spring is matched with the upper end of the transmission rod, downward pressure is applied to the transmission rod, the lower end of the transmission rod extends outwards relative to the sliding ruler plate, and a section of the transmission rod extending outwards relative to the sliding ruler plate can be partially retracted into the sliding ruler plate;
the upper end of the transmission rod is provided with a rack arranged along the vertical direction; the rack is matched with the displacement encoder through a gear transmission unit, so that the vertical displacement variable of the transmission rod is transmitted to the displacement encoder, and the required digital signal is output after the vertical displacement variable is processed by the signal processing unit.
2. The road surface flatness measuring instrument of claim 1, wherein: vertical extending groove cavities are respectively formed in vertical arms of the portal frame, flat arms are respectively arranged at two ends, matched with the portal frame, of the slide rule plate and extend to the groove cavities, and reset springs are arranged between the bottom surfaces of the groove cavities and the flat arms, and the axes of the reset springs are vertical to the flat arms.
3. A road surface flatness measuring instrument as claimed in claim 2, wherein: establish the outer tube in the reset spring overcoat, the both ends of this outer tube are fixed between the upper and lower terminal surface of vallecular cavity, and this outer tube is equipped with the bar groove that extends along vertical direction towards one side of flat arm moreover, and the flat arm is through the cooperation of the upper end of this bar groove in stretching into the outer tube with reset spring.
4. The road surface flatness measuring instrument of claim 1, wherein: the lower end face of the transmission rod is a spherical surface.
5. A road surface flatness measuring instrument according to claim 4, wherein: the end part of the lower end of the transmission rod is conical, and the end head of the conical part is a spherical surface.
6. A road surface flatness measuring instrument as claimed in any one of claims 1 to 4, wherein: the sliding ruler plate comprises a base plate and a cover plate arranged at the upper end of the base plate; the transmission rods are arranged at intervals along the length direction of the base plate;
the upper end face of the base plate is distributed with stepped through holes corresponding to the transmission rods;
the lower end of the transmission rod penetrates through the stepped through hole, and the outer wall of the middle upper part is provided with a shoulder which is matched with the shoulder of the stepped through hole to support the transmission rod in the stepped through hole;
the lower end of the pressure spring is sleeved at the upper end of the transmission rod, and the upper end of the pressure spring is inserted into a hole formed in the cover plate;
and an arm seat is arranged on the lower end face of the cover plate, and the displacement encoder and the gear transmission unit are installed on the arm seat.
7. The road surface flatness measuring instrument of claim 6, wherein: the arm seat and the cover plate matched linear track structure are provided with a position adjusting assembly, and the position adjusting assembly can drive the arm seat to move towards the direction close to the rack and the direction away from the rack.
8. The road surface flatness measuring instrument of claim 6, wherein: the utility model discloses a gear rack, including the drive pole, the drive pole is equipped with the drive pole, the shoulder upside cover of drive pole is equipped with three ring, and sets up the ring that is equipped with the internal thread at upside and downside, the rack sets up on the ring in the middle, and the ring that the upside set up and the ring that the downside set up pass through the screw thread form cooperation with the drive pole, can reciprocate relatively the drive pole and fix the ring that sets up in the middle.
9. The road surface flatness measuring instrument of claim 6, wherein: the cover plate is provided with pre-tightening bolts which correspond to the pressure springs one by one; the cover plate is provided with a threaded hole, the upper end of the pressure spring is inserted into the threaded hole, and the pre-tightening bolt is arranged at the upper end of the threaded hole.
10. The road surface flatness measuring instrument of claim 1, wherein: the gear transmission unit is a gear set formed by multiple gears, and when the input end gear meshed with the rack rotates for one circle, the output end gear coaxially arranged with the displacement encoder rotates for N circles, and N is larger than 1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022005350.0U CN213625122U (en) | 2020-09-14 | 2020-09-14 | Road surface flatness measuring instrument |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022005350.0U CN213625122U (en) | 2020-09-14 | 2020-09-14 | Road surface flatness measuring instrument |
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| CN213625122U true CN213625122U (en) | 2021-07-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116966948A (en) * | 2023-08-23 | 2023-10-31 | 苏州朗信智能科技有限公司 | Ferroalloy crushing system and crushing method thereof |
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2020
- 2020-09-14 CN CN202022005350.0U patent/CN213625122U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116966948A (en) * | 2023-08-23 | 2023-10-31 | 苏州朗信智能科技有限公司 | Ferroalloy crushing system and crushing method thereof |
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