Roadbed flatness detection device for roadbed construction

Abstract

The utility model relates to a roadbed flatness detection device for roadbed construction, which comprises a movable frame, a middle detection box, a side detection box, a measuring rod, a displacement sensor, a laser transmitter and a laser receiver, a detection cross frame is horizontally arranged on the movable frame; the middle detection box is arranged in the middle of the detection cross frame, and side detection boxes are arranged on the left and right sides of the detection cross frame; measuring rods which move up and down along with the flatness of the roadbed are arranged in the middle detection box and the side detection boxes; the displacement sensor is arranged in the middle detection box and corresponds to the upper end of the measuring rod arranged in the middle detection box up and down; the laser receivers are fixed on the left and right outer walls of the middle detection box; the laser transmitter is arranged at the upper end of the measuring rod in the side detection box, and a laser beam transmitted by the laser transmitter penetrates through the detection box and irradiates the corresponding laser receiver. Continuous measurement in the length direction can be carried out at different roadbed width positions at the same time, the measurement frequency is reduced, and the measurement efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of roadbed construction, in particular to a roadbed flatness detection device for roadbed construction. Background Art

[0002] The roadbed is the foundation of the track or road surface. It is a geotechnical structure formed by excavation or filling. The roadbed needs to maintain a certain degree of flatness during construction.

[0003] Publication number CN216338907U discloses a roadbed flatness detection device for roadbed construction, which belongs to the field of roadbed construction technology, including a base, a water tank fixedly installed above the base, a water pump fixedly installed inside the water tank, a nozzle equipped on one side of the water tank, a pull rod rotatably arranged on the other side of the base, and a cleaning brush rotatably arranged on one side of the lower side of the base. Micro switches are equipped on one side of the warning light A and the warning light B, and the micro switches extend to the inner wall of the outer shell, and the outer shell and the connecting rod are elastically connected by a spring. When there is a raised part on the roadbed surface, the warning light A is turned on, otherwise, the warning light B is turned on. By observing the conditions of the warning lights A and B, the flatness of the roadbed surface can be detected.

[0004] The device is suitable for continuously measuring the flatness of the roadbed in the length direction. However, the flatness of the roadbed also varies in the width direction. For example, the road surface may have local inclination or settlement along the width direction. The device needs to perform multiple measurements to obtain a more comprehensive measurement result. It is unable to directly and quickly measure the flatness of the roadbed in the width direction, which limits the measurement efficiency of the device. This problem is particularly prominent when the roadbed is wide.

[0005] Based on this, it is necessary to study a roadbed flatness detection device for roadbed construction. Utility Model Content

[0006] In view of this, the purpose of the utility model is to provide a roadbed flatness detection device for roadbed construction, which can effectively solve the problem that the existing detection device has poor efficiency in obtaining comprehensive measurement results when the roadbed width is wide.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A roadbed flatness detection device for roadbed construction, comprising a movable frame capable of moving in a front-rear direction, a middle detection box, a side detection box, a measuring rod, a displacement sensor, a laser transmitter and a laser receiver;

[0009] The movable frame is horizontally provided with a detection cross frame extending in the left-right direction;

[0010] The middle detection box is arranged in the middle of the detection horizontal frame, and side detection boxes are arranged on the left and right sides of the detection horizontal frame;

[0011] The middle detection box and the side detection box are both provided with measuring rods that can move up and down, and the lower ends of the measuring rods are provided with abutment wheels that contact the roadbed;

[0012] The displacement sensor is arranged in the middle detection box and corresponds to the upper end of the measuring rod arranged in the middle detection box;

[0013] The laser receiver is fixed on the left and right outer walls of the middle detection box;

[0014] The laser transmitter is arranged at the upper end of the measuring rod in the side detection box. A through avoidance hole is opened on one side wall of the side detection box facing the middle detection box. The laser beam emitted by the laser transmitter passes through the avoidance hole and irradiates the corresponding laser receiver.

[0015] Furthermore, the interior of the middle detection box and the side detection box are both provided with partitions, and the interior is divided into a detection chamber and a spring chamber by the partitions;

[0016] The upper end of the measuring rod passes through the partition and is distributed in the detection cavity, and the lower end of the measuring rod passes downward through the spring cavity and the detection cross frame;

[0017] The middle part of the measuring rod is fixedly sleeved with a limit ring, and the limit ring is distributed in the spring cavity;

[0018] A compression spring is sleeved on the middle part of the measuring rod, and the compression spring is located between the partition plate and the limiting ring.

[0019] Furthermore, the diameters of the avoidance hole and the laser receiver are both larger than the range within which the laser transmitter can move up and down.

[0020] Furthermore, the displacement sensor is an inductive displacement sensor; a measuring disk is horizontally arranged at the upper end of the measuring rod in the middle detection box, the upper surface of the measuring disk corresponds to the upper and lower positions of the displacement sensor, and an iron core is arranged in the measuring disk.

[0021] Furthermore, a tilt sensor is provided on the middle detection box.

[0022] The beneficial effects of the above technical solution are:

[0023] (1) The utility model sets a detection cross frame perpendicular to the forward direction on the mobile frame, sets a middle detection box in the middle of the detection cross frame, and sets a measuring rod that can move up and down in the middle detection box. The lower end of the measuring rod is equipped with an abutment wheel that contacts the roadbed. The top of the middle detection box is provided with a displacement sensor, which corresponds to the upper end position of the measuring rod. When the measuring rod moves up and down due to the uneven road surface, the displacement sensor can detect the up and down movement of the measuring rod, so as to obtain the road surface flatness data; and side detection frames are set at the left and right ends of the detection cross frame, and the side detection box is also provided with The measuring rod can move up and down. When the measuring rod on the side moves up and down due to encountering unevenness problems such as bumps and concave spots in the width direction of the road surface or local terrain inclination, the laser transmitter arranged on the upper part of the measuring rod will change its position up and down, thereby being captured by the laser receiver arranged on the outer wall of the middle detection box, and finally obtaining the flatness of the roadbed below the side detection box. It can simultaneously perform continuous measurement in the length direction at different roadbed width positions, which solves the problem of poor efficiency of existing detection devices in obtaining comprehensive measurement structures when the roadbed width is wide, can reduce the number of measurements and improve measurement efficiency.

[0024] (2) The utility model uses laser to measure the flatness in the width direction, which can cover more detection points and achieve more comprehensive and detailed flatness and inclination detection of the road surface. Assuming that a certain section of the road surface has an asymmetrical inclination on the left and right sides, the side detection box and laser system can detect the detailed displacement and inclination of the left and right sides of the roadbed, providing more comprehensive road condition data. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a front view schematic diagram of the utility model;

[0026] Figure 2 for Figure 1 Side view of

[0027] Figure 3 for Figure 1 Top view of the .

[0028] Figure numerals: 1 is a mobile frame, 2 is a middle detection box, 3 is a side detection box, 4 is a measuring rod, 5 is a displacement sensor, 6 is a laser transmitter, 7 is a laser receiver, 8 is a roadbed, 9 is an inclination sensor, 101 is a detection cross frame, 102 is a supporting wheel, 201 is a detection cavity, 202 is a spring cavity, 203 is an avoidance hole, 204 is a partition, 401 is an abutment wheel, 402 is a limit ring, 403 is a compression spring, and 404 is a measuring disk. DETAILED DESCRIPTION

[0029] The utility model is further described in detail below with reference to the accompanying drawings and specific implementation methods:

[0030] This embodiment aims to provide a roadbed flatness detection device for roadbed construction, which is mainly used to detect the flatness of a wider roadbed 8, in order to address the problem that the existing detection device has poor efficiency in obtaining comprehensive measurement results when the roadbed 8 is wider.

[0031] A roadbed flatness detection device for roadbed construction, such as Figure 1 , including a movable frame 1 that can move in the front-rear direction, and also includes a middle detection box 2, a side detection box 3, a measuring rod 4, a displacement sensor 5, a laser transmitter 6 and a laser receiver 7.

[0032] like Figure 1 and Figure 2 The lower part of the mobile frame 1 is provided with four sets of supporting wheels 102 and their wheel frames to form a stable support. Figure 1 The front-to-back direction, i.e. the length direction of the roadbed 8, moves; Figure 3 A detection cross frame 101 extending in the left-right direction is horizontally arranged on the movable frame 1, and the left-right direction is the width direction of the roadbed 8.

[0033] The middle detection box 2 is fixedly installed at the center position above the detection cross frame 101, and the side detection boxes 3 are fixedly installed on the left and right sides of the detection cross frame 101; the interiors of the middle detection box 2 and the side detection box 3 are both provided with measuring rods 4 that can move up and down, and the lower end of the measuring rod 4 is provided with a contact wheel 401 that contacts the roadbed 8. The abutment wheel 401 is in abutment contact with the surface of the roadbed 8, so that the measuring rod 4 changes its up and down position according to the flatness of the road surface.

[0034] In this embodiment, in order to make the contact wheel 401 better contact with the surface of the roadbed 8, as shown in FIG. Figure 1 , the interior of the middle detection box 2 and the side detection box 3 are both provided with a partition 204, and the interior is divided into a detection chamber 201 and a spring chamber 202 by the partition 204; the upper end of the measuring rod 4 passes through the partition 204 and is distributed in the detection chamber 201, and the lower end of the measuring rod 4 passes downward through the spring chamber 202 and the detection cross frame 101, and the measuring rod 4 slides vertically into the partition 204 and the detection cross frame 101. The middle part of the measuring rod 4 is fixedly fitted with a limit ring 402, and the limit ring 402 is distributed in the spring chamber 202; the middle part of the measuring rod 4 is fitted with a compression spring 403, and the compression spring 403 is located between the partition 204 and the limit ring 402. Under the elastic force of the compression spring 403, the wheel surface of the abutting wheel 401 at the lower end of the measuring rod 4 abuts against the roadbed 8, so as to ensure that the abutting wheel 401 can contact more with the surface of the roadbed 8.

[0035] The displacement sensor 5 is arranged in the middle detection box 2 and corresponds to the upper end of the measuring rod 4 arranged in the middle detection box 2. The displacement sensor 5 can be a potential displacement sensor 5. The upper end of the measuring rod 4 drives the sliding terminal to move up and down to change the resistance between the sliding terminal and the fixed terminal to measure the displacement.

[0036] However, in this embodiment, the displacement sensor 5 adopts an inductive displacement sensor 5, and a measuring disk 404 is horizontally arranged at the upper end of the measuring rod 4 in the middle detection box 2, and the upper surface of the measuring disk 404 corresponds to the position of the displacement sensor 5; an iron core is arranged in the measuring disk 404, or the measuring disk 404 is made of metal. The inductive sensor is a sensor that works on the principle of mutual inductance between a metal conductor and an alternating electromagnetic field. Its working principle is that the detection coil located at the front end of the sensor generates a high-frequency magnetic field. When a metal object such as an iron core approaches the magnetic field, a microcurrent is generated inside the iron core, causing the magnetic field energy to decay. The amplitude of the output voltage is proportional to the displacement of the iron core, thereby achieving the purpose of non-contact detection of the displacement of the iron core, which can effectively avoid wear between the measuring rod 4 and the displacement sensor 5, and is not prone to abnormal alignment due to problems such as frequent contact and bumps. It has the advantages of long life and high reliability, and can accurately measure the up and down position changes of the detection rod.

[0037] The laser receiver 7 is fixed on the left and right outer walls of the middle detection box 2. The laser receiver 7 is a target disk structure. The laser receiver 7 adopts PSD position sensitive detector technology and can continuously output the position of the incident light spot. The working principle of the position sensitive detector is based on the photoelectric effect. When the laser beam irradiates the PSD surface, the photocurrent generated generates a voltage difference on the internal resistance layer of the PSD. The position of the light spot can be determined by measuring the voltage difference. PSD position sensitive detector technology is widely used in industrial measurement, automatic control, precision positioning and other fields, and can achieve high-precision displacement and position detection.

[0038] The laser emitter 6 is arranged at the upper end of the measuring rod 4 in the side detection box 3. The laser emitter 6 is mainly used to continuously emit a horizontal laser beam toward the laser receiver 7. A through avoidance hole 203 is provided on one side wall of the side detection box 3 facing the middle detection box 2. The laser beam emitted by the laser emitter 6 passes through the avoidance hole 203 and irradiates the corresponding laser receiver 7. In order to ensure that the laser beam can always fall on the laser receiver 7, the diameters of the avoidance hole 203 and the laser receiver 7 are both larger than the range in which the laser emitter 6 can move up and down.

[0039] The laser receiver 7 can detect the spot position of the laser beam emitted by the laser transmitter 6 in real time; when the measuring rod 4 in the side detection box 3 changes position up and down due to the inclination or undulation of the roadbed 8, the laser transmitter 6 on its top will also change its position up and down, and the spot position of the laser transmitter 6 on the laser receiver 7 will also change with the up and down position. The laser receiver 7 calculates the up and down displacement by detecting and outputting the position of the light spot, thereby calculating the flatness of the roadbed 8.

[0040] Taking into account that when the surface of the roadbed 8 is tilted as a whole, the mobile frame 1 and the detection device may also tilt as a whole, resulting in the inability to detect the overall tilt, resulting in an error. In this regard, a tilt sensor 9 is provided on the middle detection box 2. The tilt sensor 9 is mainly used to detect the horizontality of the middle detection box 2 and the entire mobile frame 1. When the mobile frame 1 is tilted as a whole, the current tilt angle can be detected, which is used to calculate the flatness of the roadbed 8 to avoid the error caused by the inability to detect the overall tilt. At the same time, when the device is leveled before the detection, it is used to determine whether it is adjusted in place to ensure the horizontality of the mobile frame 1.

Claims

1. A roadbed flatness detection device for roadbed construction, comprising a movable frame (1) capable of moving in a front-rear direction, characterized in that: It also includes a middle detection box (2), a side detection box (3), a measuring rod (4), a displacement sensor (5), a laser transmitter (6) and a laser receiver (7); The movable frame (1) is horizontally provided with a detection cross frame (101) extending in the left-right direction; The middle detection box (2) is arranged in the middle of the detection horizontal frame (101), and the left and right sides of the detection horizontal frame (101) are both provided with side detection boxes (3); The middle detection box (2) and the side detection box (3) are both provided with measuring rods (4) movably disposed up and down, and the lower end of the measuring rod (4) is provided with an abutment wheel (401) in contact with the roadbed (8); The displacement sensor (5) is arranged in the middle detection box (2) and corresponds vertically to the upper end of the measuring rod (4) arranged in the middle detection box (2); The laser receiver (7) is fixed on the left and right outer walls of the middle detection box (2); The laser transmitter (6) is arranged at the upper end of the measuring rod (4) in the side detection box (3); a through avoidance hole (203) is provided on a side wall of the side detection box (3) facing the middle detection box (2); a laser beam emitted by the laser transmitter (6) passes through the avoidance hole (203) and irradiates a corresponding laser receiver (7).

2. A roadbed flatness detection device for roadbed construction according to claim 1, characterized in that: The interior of the middle detection box (2) and the side detection box (3) are both provided with a partition (204), and the interior is divided into a detection chamber (201) and a spring chamber (202) by the partition (204) at the top and bottom. The upper end of the measuring rod (4) passes through the partition (204) and is distributed in the detection cavity (201), and the lower end of the measuring rod (4) passes downward through the spring cavity (202) and the detection cross frame (101); A limit ring (402) is fixedly sleeved on the middle part of the measuring rod (4), and the limit ring (402) is distributed in the spring cavity (202); A compression spring (403) is sleeved on the middle part of the measuring rod (4), and the compression spring (403) is located between the partition plate (204) and the limiting ring (402).

3. A roadbed flatness detection device for roadbed construction according to claim 1, characterized in that: The diameters of the avoidance hole (203) and the laser receiver (7) are both larger than the range within which the laser transmitter (6) can move up and down.

4. A roadbed flatness detection device for roadbed construction according to claim 1, characterized in that: The displacement sensor (5) is an inductive displacement sensor; a measuring disc (404) is horizontally arranged at the upper end of the measuring rod (4) in the middle detection box (2); the upper surface of the measuring disc (404) corresponds to the upper and lower positions of the displacement sensor (5); and an iron core is arranged in the measuring disc.

5. A roadbed flatness detection device for roadbed construction according to claim 1, characterized in that: The middle detection box (2) is provided with an inclination sensor (9).

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