Track detection trolley and detection method

Abstract

The invention relates to the technical field of track detection, in particular to a track detection trolley and a detection method. Comprising a frame and four double-wheel mechanisms, the four double-wheel mechanisms are arranged at the four corners of the frame respectively, and each double-wheel mechanism comprises two rotating wheels arranged side by side; an acceleration sensor is arranged between two rotating wheels of the double-wheel mechanism, a distance detection device is arranged on the frame, and the acceleration sensors and the distance detection device are electrically connected with the processor; the deformation state of the railway track is comprehensively judged by processing data collected by the acceleration sensor and the distance detection device. According to the scheme, a double-wheel structure is adopted, the stability of the detection trolley can be improved, and the detection trolley can stably pass through a rail gap and a harmful space at the point of a turnout point rail; the deformation state of the railway track is judged by integrating various detection results, and the detection results are more accurate and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of track detection, and more particularly, to a track detection trolley and a detection method. Background Art

[0002] Currently, the carriers of track detection equipment for railway lines are in the form of a T-shape (T-shaped trolley) or a four-wheel structure, and are mostly applied to contact detection equipment such as track inspection instruments. For T-shaped trolleys or other forms of vehicles on the market, a roller is configured at each end of the trolley to achieve the purpose of traveling on the railway track. Similar trolleys all have a problem: when there is a rail gap at the connection between the front and rear sections of the rail on a jointed track, during the walking process of the trolley on it, due to the single-wheel structure, different degrees of jitter will occur at the gap position, resulting in too large a deviation in the detection results of the equipment and unable to meet the detection requirements.

[0003] In addition, when such trolleys detect the track state, they usually judge the track condition based on the change of a single detection parameter. Affected by the smoothness of the trolley, the judgment results are often incorrect. Summary of the Invention

[0004] The purpose of the present invention is to provide a track detection trolley and a detection method, which can pass through the rail gap and the harmful space at the tip of the switch frog more smoothly and can more accurately judge the true state of the track by integrating various parameters.

[0005] The embodiments of the present invention are implemented as follows:

[0006] In a first aspect, the present invention provides a track detection trolley, including a frame and four double-wheel mechanisms. The four double-wheel mechanisms are respectively arranged at the four corners of the frame, and each double-wheel mechanism includes two rotating wheels arranged in parallel.

[0007] An acceleration sensor is respectively arranged at the position between the two rotating wheels of the double-wheel mechanism.

[0008] A distance detection device is arranged on the frame. The distance detection device includes at least two first rangefinders and two second rangefinders. The two first rangefinders are respectively used to detect the distance between the detection end of the first rangefinder and the bottom of the two railway tracks, and the two second rangefinders are respectively used to detect the distance between the detection end of the second rangefinder and the top of the two railway tracks.

[0009] It further includes a processor, and the acceleration sensor, the first rangefinder, and the second rangefinder are all electrically connected to the processor.

[0010] In an alternative embodiment, an inclination sensor is further provided on the vehicle frame, and the inclination sensor is used to detect the inclination angle of the vehicle frame.

[0011] In an alternative embodiment, an encoder is provided on one of the double-wheel mechanisms.

[0012] In an alternative embodiment, the double-wheel mechanism includes two rotating wheels and a mounting bracket. The two rotating wheels are rotatably provided on the mounting bracket, and the mounting bracket is connected to the vehicle frame;

[0013] The rotating wheel includes a wheel body, a mounting shaft and a bearing. The bearing is provided on the mounting bracket, the mounting shaft is provided on the bearing, and one end of the mounting shaft is fixedly connected to the wheel body, and the other end is connected to the encoder.

[0014] In an alternative embodiment, the double-wheel mechanism equipped with the encoder further includes a first gear, a second gear and a belt. The first gear and the second gear are respectively provided on the two mounting shafts, and the belt connects the first gear and the second gear.

[0015] In a second aspect, the present invention provides a detection method for an orbital detection trolley based on an inclination sensor, including the following steps:

[0016] Record the distances D1 and D2 between the detection ends of the two first rangefinders and the bottom of the two railway tracks respectively in chronological order;

[0017] Record the distances D3 and D4 between the detection ends of the two second rangefinders and the bottom of the two railway tracks respectively in chronological order;

[0018] Record the first set of acceleration values a1 and a2 of the acceleration sensor on one railway track, and the second set of acceleration values a3 and a4 of the acceleration sensor on the other railway track in chronological order;

[0019] Record the angle value α of the inclination sensor in chronological order;

[0020] Process D1, D2, D3, D4, a1, a2, a3, a4 and α to judge the deformation state of the railway track.

[0021] In an alternative embodiment, calculate the difference Δd1 between D1 and D2;

[0022] If at a certain moment, Δd1 is greater than the first threshold, and the α value at this moment is less than the third threshold, and a1, a2, a3 and a4 are all less than the fourth threshold, it is determined that at this moment, the bottom of the railway track position corresponding to the first rangefinder has undergone a deformation in the horizontal direction.

[0023] In an alternative embodiment, calculate the difference Δd2 between D3 and D4;

[0024] If at a certain moment, Δd2 is greater than the first threshold, and the α value at this moment is less than the third threshold, and a1, a2, a3, and a4 are all less than the fourth threshold, it is determined that at this moment, the rail top of the railway track position corresponding to the first rangefinder has undergone a horizontal deformation.

[0025] In an alternative embodiment, calculate the difference Δd2 between D3 and D4;

[0026] If within a period of time t, Δd2 is always less than the first threshold, while α appears at least twice greater than the third threshold, and within this period of time, one of the first set of acceleration values and the second set of acceleration values appears greater than the fourth threshold, while the other is always less than the fourth threshold, it is determined that within this period of time, the railway track at the position where the track detection trolley passes has undergone a vertical deformation.

[0027] In an alternative embodiment, if within a period of time t, α is always greater than the third threshold, and a1, a2, a3, and a4 are all less than the fourth threshold, it is determined that within this period of time, the railway track at the position where the track detection trolley passes is uphill or downhill.

[0028] The beneficial effects of the embodiments of the present invention are:

[0029] The present invention changes the single-wheel structure in the prior art to a double-wheel structure, which can improve the stability of the detection trolley and can smoothly pass through the rail gap and the harmful space at the tip of the switch frog.

[0030] Moreover, based on the ranging data, the present invention combines the detection results of the inclination sensor and the acceleration sensor of the double-wheel structure to comprehensively judge the deformation state of the railway track, and the detection result is more accurate and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0032] Figure 1 Schematic diagram of the first perspective structure of the track detection trolley provided by the embodiment of the present invention;

[0033] Figure 2 Schematic diagram of the second perspective structure of the track detection trolley provided by the embodiment of the present invention;

[0034] Figure 3 is Figure 2 The enlarged schematic diagram of the local part A in

[0035] Figure 4 is Figure 2 The enlarged schematic diagram of the local part B in

[0036] Figure 5 The flowchart of the detection method based on the track detection trolley.

[0037] Icon:

[0038] 10 - Frame; 11 - Intermediate cross beam; 12 - End bracket; 121 - Bolt hole; 13 - Adjustable bolt; 14 - Spring; 20 - First double-wheel mechanism; 21 - First rotating wheel; 22 - First mounting bracket; 23 - Locknut; 30 - Second double-wheel mechanism; 31 - Second rotating wheel; 311 - Second wheel body; 312 - Second mounting shaft; 313 - Second bearing; 32 - Second mounting bracket; 33 - First gear; 34 - Second gear; 35 - Belt; 40 - Coding component; 50 - Mounting seat; 60 - Rotating rod; 70 - Computer bracket. Specific embodiments

[0039] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0041] It should be noted that: like reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0042] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, terms such as "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0043] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0044] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0045] This embodiment provides a track detection system, which is mainly applied to the track detection of railway lines. In order to solve the problem that the existing track detection trolley shakes violently and unstably when passing through gaps or the harmful space of turnouts, this embodiment provides a track detection trolley, which is as follows.

[0046] As Figure 1 and Figure 2 shown, a track detection trolley provided in this embodiment includes a vehicle frame 10, a first double-wheel mechanism 20, a second double-wheel mechanism 30, and a coding component 40. Three first double-wheel mechanisms 20 and one second double-wheel mechanism 30 are respectively arranged at the four corners of the vehicle frame 10. The first double-wheel mechanism 20 includes two first rotating wheels 21, a first mounting frame 22, and fastening nuts 23. The first mounting frame 22 is connected to the vehicle frame 10. Both first rotating wheels 21 are arranged on the first mounting frame 22 and are fixed by fastening nuts 23. The coding component 40 is arranged on the second double-wheel mechanism 30.

[0047] It can be understood that this embodiment proposes a structure of an orbital inspection trolley equipped with eight rollers. Four pairs of rollers are respectively installed at the four corners of the trolley. Each pair of first rotating wheels 21 is installed at the same height through a first mounting bracket 22. When passing through the rail gap or the harmful space area at the tip of the switch frog, one of the first rotating wheels 21 enters the rail gap first, and the other rotating wheel still clings to the rail to support the entire trolley to move forward. Since the heights are the same, when the wheel that enters the rail gap leaves and enters the next section of the rail, even if the subsequent rollers enter the rail gap again, it will not affect the walking process of the overall equipment. When the overall trolley passes through the rail gap, it is basically in a condition of no jitter, enabling the detection result of the equipment to reach an ideal state. Correspondingly, the principle is the same when passing through the harmful space at the tip of the switch frog.

[0048] This embodiment changes the single-wheel structure in the prior art to a double-wheel structure, which can improve the stability of the inspection trolley, and can smoothly pass through the rail gap and the harmful space at the tip of the switch frog. In addition, the encoder assembly is arranged on the double-wheel mechanism, so that the inspection trolley can still maintain the stability and integrity of the signal when passing through the rail gap and the harmful space at the tip of the switch frog.

[0049] In a preferred embodiment, the vehicle frame 10 includes an intermediate cross beam 11 and two end brackets 12. The two end brackets 12 are respectively arranged at both ends of the intermediate cross beam 11. Both ends of one end bracket 12 are respectively connected to two first double-wheel mechanisms 20; both ends of the other end bracket 12 are respectively connected to a first double-wheel mechanism 20 and a second double-wheel mechanism 30. Specifically, there are two intermediate cross beams 11, and the two intermediate cross beams 11 are arranged in parallel.

[0050] In a preferred embodiment, as Figure 3 shown, the vehicle frame 10 further includes an adjustable bolt 13 and a spring 14. The end bracket 12 is provided with a through hole, and the adjustable bolt 13 passes through the through hole to connect to the intermediate cross beam 11. The spring 14 is arranged between the bolt head of the adjustable bolt 13 and the end bracket 12. It can be understood that when the adjustable bolt 13 is tightened, the spring 14 abuts against the end bracket 12. Since the spring 14 has a buffering effect, when the inspection trolley travels on the track for inspection, it can buffer some uneven tracks.

[0051] In a preferred embodiment, bolt holes 121 are arranged at both ends of the end bracket 12. Bolts pass through the bolt holes 121 to connect the end bracket 12 to the double-wheel mechanism and the end bracket 12 to the second double-wheel mechanism 30. Specifically, the bolt holes 121 are designed with a clearance adjustment margin of 0.5 mm, so that when the first double-wheel mechanism 20 and the second double-wheel mechanism 30 are fixed to the end bracket 12, an adjustment clearance of 0-2 degrees is allowed, and the installation deviation (0.5 mm) of the two wheels can be eliminated, so that the horizontal heights of the two wheels are kept the same, thus ensuring the smooth and non-jittery walking process of the carrier.

[0052] In a preferred embodiment, as Figure 4 shown, the second double-wheel mechanism 30 includes two second rotating wheels 31 and a second mounting bracket 32. The two second rotating wheels 31 are rotatably arranged on the second mounting bracket 32, and the second mounting bracket 32 is connected to the vehicle frame 10;

[0053] The second rotating wheel 31 includes a second wheel body 311, a second mounting shaft 312 and a second bearing 313. The second bearing 313 is arranged on the second mounting bracket 32, the second mounting shaft 312 is arranged on the second bearing 313, and one end of the second mounting shaft 312 is fixedly connected to the second wheel body 311, and the other end is connected to the coding assembly 40. Specifically, when the second wheel body 311 rotates, it can drive the second mounting shaft 312 to rotate, and the second bearing 313 is connected to the coding assembly 40. Therefore, the rotation signal of the second wheel body 311 is captured by the coding assembly 40 through the second mounting shaft 312, and the coding assembly 40 analyzes the condition of the track based on the rotation signal of the second wheel body 311.

[0054] In a preferred embodiment, the second double-wheel mechanism 30 further includes a first gear 33, a second gear 34 and a belt 35. The first gear 33 and the second gear 34 are respectively arranged on the two second mounting shafts 312, and the belt 35 connects the first gear 33 and the second gear 34. It can be understood that by connecting the two second mounting shafts 312 through the first gear 33, the second gear 34 and the belt 35, no matter which one of the second wheel bodies 311 rotates, the encoder will simultaneously obtain the torque force and rotate. This avoids the situation where the encoder does not rotate due to one of the second wheel bodies 311 being suspended when passing through the rail gap or the harmful area at the tip of the switch point rail.

[0055] In a preferred embodiment, the track detection trolley further includes a mounting seat 50, a rotating rod 60 and a computer bracket 70. The mounting seat 50 is arranged on the vehicle frame 10, one end of the rotating rod 60 is rotatably connected to the mounting seat 50, and the other end is connected to the computer bracket 70. It can be understood that the computer is placed on the computer bracket 70 and can be adjusted to any position through the rotating rod 60.

[0056] In a preferred embodiment, the distance between the two first rotating wheels 21 is 180 mm to 200 mm. Specifically, the distance between the two second rotating wheels 31 is also 180 mm to 200 mm.

[0057] It can be understood that the center distance between the two first rotating wheels 21 or the two second rotating wheels 31 is 190 mm. This distance can effectively ensure that when one wheel is on the rail gap or in the harmful space area at the tip of the switch point rail, the other wheel is on the rail, playing an effective supporting role.

[0058] To detect a railway track, an acceleration sensor (not shown) is respectively arranged at the positions between the two rotating wheels of the first double-wheel mechanism 20 and the second double-wheel mechanism 30;

[0059] A distance detection device is suspended in the middle of the vehicle frame 10. The distance detection device includes at least two first distance measuring instruments (not shown) and two second distance measuring instruments (not shown); the two first distance measuring instruments are respectively used to detect the distances between the detection ends of the first distance measuring instruments and the bottom surfaces of the two railway tracks, and the two second distance measuring instruments are respectively used to detect the distances between the detection ends of the second distance measuring instruments and the top surfaces of the two railway tracks; an inclination sensor is also arranged on the vehicle frame, and the inclination sensor is used to detect the inclination angle of the vehicle frame.

[0060] It further includes a processor, and the acceleration sensor, the inclination sensor, the first distance measuring instrument and the second distance measuring instrument are all electrically connected to the processor.

[0061] As Figure 5 shown, when using this track detection trolley to detect a railway track, the following steps are included:

[0062] Calibrate the first distance measuring instrument, the second distance measuring instrument, the acceleration sensor and the inclination sensor;

[0063] Record the distances D1 and D2 between the detection ends of the two first distance measuring instruments and the bottom surfaces of the two railway tracks respectively in chronological order;

[0064] Record the distances D3 and D4 between the detection ends of the two second distance measuring instruments and the bottom surfaces of the two railway tracks respectively in chronological order;

[0065] Record the first set of acceleration values a1 and a2 of the acceleration sensor on one railway track and the second set of acceleration values a3 and a4 of the acceleration sensor on the other railway track in chronological order;

[0066] Record the angle value α of the inclination sensor in chronological order;

[0067] Summarize the above information to the processor, process D1, D2, D3, D4, a1, a2, a3, a4 and α, and judge the deformation state of the railway track.

[0068] Judgment in the first case:

[0069] Calculate the difference Δd1 between D1 and D2;

[0070] If at a certain moment, Δd1 is greater than the first threshold, and the α value at this moment is less than the third threshold, and a1, a2, a3, and a4 are all less than the fourth threshold, that is, the frame 10 maintains a stable horizontal state at this moment, then it can be determined that at this moment, the bottom of the rail at the position of the railway track corresponding to the first rangefinder has undergone a horizontal deformation.

[0071] Judgment of the second case:

[0072] Calculate the difference Δd2 between D3 and D4;

[0073] If at a certain moment, Δd2 is greater than the first threshold, and the α value at this moment is less than the third threshold, and a1, a2, a3, and a4 are all less than the fourth threshold, that is, the frame 10 maintains a stable horizontal state at this moment, then it is determined that at this moment, the top of the rail at the position of the railway track corresponding to the first rangefinder has undergone a horizontal deformation.

[0074] Judgment of the third case:

[0075] Calculate the difference Δd2 between D3 and D4;

[0076] If within a period of time t, Δd2 is always less than the first threshold, while α appears at least twice greater than the third threshold, and within this period of time, one of the first group of acceleration values and the second group of acceleration values appears greater than the fourth threshold, while the other group is always less than the fourth threshold, that is, there is a convex or concave situation at the top of one rail, then it can be determined that within this period of time, the railway track at the position where the track detection trolley passes has undergone a vertical deformation.

[0077] Judgment of the third case:

[0078] If within a period of time t, α is always greater than the third threshold, and a1, a2, a3, and a4 are all less than the fourth threshold, that is, the frame 10 maintains a stable state but is not in a horizontal state, then it can be determined that within this period of time, the railway track at the position where the track detection trolley passes is uphill or downhill.

[0079] Based on the ranging data, the present invention combines the detection results of the inclination sensor and the acceleration sensor with a double-wheel structure to comprehensively judge the deformation state of the railway track, and the detection result is more accurate and reliable.

[0080] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An orbital inspection trolley, characterized in that, It includes a frame and four double-wheel mechanisms. The four double-wheel mechanisms are respectively arranged at the four corners of the frame. Each double-wheel mechanism includes two rotatable wheels arranged side by side. Acceleration sensors are respectively arranged at positions between the two rotatable wheels of each double-wheel mechanism. A distance detection device is arranged on the frame. The distance detection device includes at least two first rangefinders and two second rangefinders. The two first rangefinders are respectively used to detect the distances between the detection ends of the first rangefinders and the bottoms of two railway tracks. The two second rangefinders are respectively used to detect the distances between the detection ends of the second rangefinders and the tops of two railway tracks. It further includes a processor. The acceleration sensors, the first rangefinders and the second rangefinders are all electrically connected to the processor.

2. The track detection trolley according to claim 1, wherein An inclination sensor is also arranged on the frame. The inclination sensor is used to detect the inclination angle of the frame.

3. The track detection trolley according to claim 1, wherein An encoder is arranged on one of the double-wheel mechanisms.

4. The track detection trolley according to claim 3, characterized in that, The double-wheel mechanism includes two rotatable wheels and a mounting bracket. The two rotatable wheels are rotatably arranged on the mounting bracket. The mounting bracket is connected to the frame. Each rotatable wheel includes a wheel body, a mounting shaft and a bearing. The bearing is arranged on the mounting bracket. The mounting shaft is arranged on the bearing. One end of the mounting shaft is fixedly connected to the wheel body, and the other end is connected to the encoder.

5. The track inspection trolley according to claim 4, characterized in that, The double-wheel mechanism where the encoder is installed further includes a first gear, a second gear and a belt. The first gear and the second gear are respectively arranged on the two mounting shafts. The belt connects the first gear and the second gear.

6. A detection method for the track detection trolley according to claim 2, characterized in that, It includes the following steps: Record the distances D1 and D2 between the detection ends of the two first rangefinders and the bottoms of the two railway tracks respectively in chronological order. Record the distances D3 and D4 between the detection ends of the two second rangefinders and the bottoms of the two railway tracks respectively in chronological order. Record the first set of acceleration values a1 and a2 of the acceleration sensors on one railway track and the second set of acceleration values a3 and a4 of the acceleration sensors on the other railway track in chronological order. Record the angle value α of the inclination sensor in chronological order. Process D1, D2, D3, D4, a1, a2, a3, a4 and α to judge the deformation state of the railway track.

7. The detection method according to claim 6, wherein Calculate the difference Δd1 between D1 and D2. If at a certain moment, Δd1 is greater than the first threshold, and the α value at this moment is less than the third threshold, and a1, a2, a3 and a4 are all less than the fourth threshold, it is judged that at this moment, the bottom of the railway track position corresponding to the first rangefinder has undergone a horizontal deformation.

8. The detection method according to claim 6, characterized in that, Calculate the difference Δd2 between D3 and D4. If at a certain moment, Δd2 is greater than the first threshold, and the α value at this moment is less than the third threshold, and a1, a2, a3 and a4 are all less than the fourth threshold, it is judged that at this moment, the top of the railway track position corresponding to the first rangefinder has undergone a horizontal deformation.

9. The detection method according to claim 6, characterized in that, Calculate the difference Δd2 between D3 and D4. If within a period of time t, Δd2 is always less than the first threshold, while α appears at least twice greater than the third threshold, and within this period of time, one of the first group of acceleration values and the second group of acceleration values is greater than the fourth threshold, while the other group is always less than the fourth threshold, then it is determined that within this period of time, the railway track at the position passed by the track detection trolley has undergone vertical deformation.

10. The detection method according to claim 6, wherein, If within a period of time t, α is always greater than the third threshold, and a1, a2, a3, and a4 are all less than the fourth threshold, then it is determined that within this period of time, the railway track at the position passed by the track detection trolley is an uphill or downhill slope.

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