Railway track inspection tester with induction plate measurement function

Abstract

The utility model relates to a railway track inspection tester with an induction plate measurement function, which comprises a frame, the end part of the frame is provided with walking wheels used for sliding on two steel rails, an induction plate is arranged between the two steel rails, the lower end surface of the frame is provided with a first laser sensor and a second laser sensor, and the first laser sensor and the second laser sensor are arranged on the frame. The first laser sensor and the second laser sensor are located over the induction plate and used for measuring the vertical distance between the first laser sensor and the second laser sensor and feeding back measurement information to a controller on the frame, and the distance between the first laser sensor and the second laser sensor is adjustable. The whole design is based on the original track detector state, the design and use cost is low, the structure is simple and independent, the existing measuring function and precision of the track detector are not affected, implementation is easy, the manufacturing cost is low, and the measuring precision is high.

Description

Technical Field

[0001] This utility model relates to the field of track inspection instrument technology, and in particular to a railway track inspection instrument with induction plate measurement function. Background Technology

[0002] With the rapid development of the national economy and the rapid growth of urban population, traffic pressure is increasing. To alleviate traffic pressure, major cities across the country are accelerating the construction of subways. Currently, 55 cities nationwide have subways, with a total operating mileage of 10,000 kilometers. Ensuring the safety of rail transportation is a constant theme, which requires the use of advanced inspection tools to inspect transportation equipment at any time and promptly detect and address equipment defects. For the geometric parameter inspection of urban rail transit lines, besides large professional inspection vehicles, the most widely used and common tool is the track inspection instrument, which employs fiber optic gyroscopes, tilt sensors, linear displacement sensors, and rotary encoders to measure track geometric parameters such as gauge, superelevation (level), elevation, direction, and torsion (triangular pits). During use, the track inspection instrument is placed on the track and manually pushed (at approximately 5 km / h) to measure the track geometric parameters. For the inspection of induction plates on lines traction by linear motors, manual measurement is still currently performed using a self-made mechanical simple measuring ruler. The literature concerning induction plate detection, including "Induction Plate Detection Device for Rail Transit Motors (Patent No. ZL202010065027.4)" and "Induction Plate Height Measurement Device and Method (Patent No. ZL200910106145.9)," describes induction plate detection devices that are dedicated to measuring induction plates and do not have the function of measuring track geometric parameters. The patent "A Comprehensive Inspection Instrument and Method for Contact Rail, Induction Plate, and Track Static Geometric Parameters" (Patent No.: 202510028947.1) uses a laser scanner to measure the induction plate. While this can measure the parameters of the induction plate, the laser scanner is expensive, and its high measuring arm causes significant swaying during the inspection process, affecting measurement accuracy.

[0003] Therefore, the static inspection of subway track geometry parameters currently mainly relies on manual track gauge inspection and automatic inspection by track inspection instruments. The inspection of contact rails and sensor plates is primarily conducted using mechanical, specialized measuring rulers. Manual measurement involves taking measurements at regular intervals along the track, requiring continuous bending and is labor-intensive and inefficient. Nighttime work is hampered by poor lighting and fatigue, making it easy for surveyors to misread data and introduce human error. Furthermore, the accuracy of mechanical measuring instruments is inherently limited. Utility Model Content

[0004] Therefore, it is necessary to provide a railway track inspection instrument with induction plate measurement function to address the above problems.

[0005] A railway track inspection instrument with induction plate measurement function includes a frame. The end of the frame is provided with a traveling wheel for sliding on two rails. An induction plate is provided between the two rails. A first laser sensor and a second laser sensor are installed on the lower end face of the frame. The first laser sensor and the second laser sensor are located directly above the induction plate and are used to measure the vertical distance from the induction plate and feed the measurement information back to the controller on the frame. The distance between the first laser sensor and the second laser sensor is adjustable.

[0006] Preferably, both the first laser sensor and the second laser sensor are electrically connected to the controller via an RS interface.

[0007] Preferably, the frame includes longitudinal beams and crossbeams, which are connected to form a T-shaped structure, and the first laser sensor and the second laser sensor are both installed below the crossbeams.

[0008] Preferably, a guide rail is provided below the crossbeam, and both the first laser sensor and the second laser sensor can be detachably mounted on the guide rail.

[0009] The advantages of this utility model are: the entire design is based on the original track inspection instrument, the design and use cost is low, and it has the advantages of simple structure, independence without affecting the existing measurement function and accuracy of the track inspection instrument, easy implementation, low cost, and high measurement accuracy. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of a railway track inspection instrument with induction plate measurement function, as one embodiment.

[0011] Figure 2 A top view schematic diagram of a railway track inspection instrument with induction plate measurement function;

[0012] Figure 3 This is a circuit diagram of a railway track inspection instrument with induction plate measurement function. Detailed Implementation

[0013] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0014] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0016] like Figures 1-3As shown, a railway track inspection instrument with a sensor plate measurement function includes a frame 1. The ends of the frame 1 are equipped with wheels 2 for sliding on two rails 100. A sensor plate 200 is positioned between the two rails 100. A first laser sensor 3 and a second laser sensor 4 are mounted on the lower surface of the frame 1, located directly above the sensor plate 200. These sensors measure the vertical distance from the sensor plate 200 and feed the measurement information back to a controller 5 on the frame 1. The distance between the first laser sensor 3 and the second laser sensor 4 is adjustable. Specifically, in this embodiment, the frame 1 is placed on the rails 100 via the wheels 2. An operator can then push the frame 1 along the rails 100 to inspect the geometric parameters of the rail surfaces of the two rails 100 and the sensor plate 200 between them. As is known, current linear motor rail transit systems utilize linear induction motor traction. The structure involves unfolding a rotary motor into a linear configuration, with the stator (primary coil) mounted on the vehicle's bogie, and the rotor (secondary coil) transformed into an induction plate 200 laid in the middle of the track (i.e., rail 100). The basic principle is as follows: when three-phase alternating current is applied to the primary winding of the linear motor, a traveling wave magnetic field is generated. The induction plate, as the secondary component, is composed of a composite of conductive materials (such as aluminum or copper) and ferromagnetic materials (such as steel). The magnetic field induces eddy currents in the induction plate, which interact with the primary magnetic field to generate a Lorentz force, thereby propelling the train forward or braking. Therefore, precise measurement of the vertical height between the induction plate 200 and the rail surface of the rail 100 is crucial. Previously, this was mostly done manually, which was labor-intensive. While laser scanners can be used, the presence of a cantilever leads to inaccuracies. Our design adds a first laser sensor 3 and a second laser sensor 4 to the existing track inspection instrument. These sensors simultaneously measure the distance to the sensing plate 200. If the measured distances are consistent, the sensing plate 200 is horizontal. If the difference in measured distances exceeds a threshold, it indicates that the sensing plate 200 is tilted, and this information is sent to the controller 5. The controller 5 then transmits the data to a laptop computer for further processing by the operator. Furthermore, the spacing between the first laser sensor 3 and the second laser sensor 4 is adjustable to accommodate sensing plates 200 of different widths, ensuring that the first laser sensor 3 and the second laser sensor 4 are always positioned above the sensing plate 200.

[0017] Since the first laser sensor 3 and the second laser sensor 4 are located above the sensing plate 200, the distance k between the first laser sensor 3 and the second laser sensor 4 and the rail surface of the rail 100 can be detected through initial measurement. This distance k is a constant. The first laser sensor 3 and the second laser sensor 4 measure the distance h from the sensing plate 200. Therefore, the horizontal value y = hk of the sensing plate can be obtained by calculation.

[0018] In the formula: y --- the horizontal value of the sensor plate to be measured

[0019] h -- Measurement value from laser sensor

[0020] k -- Fixed value

[0021] When the laser sensor measurement value h is greater than k, y is positive, indicating that the top surface of the sensing plate 200 is lower than the rail plane of the rail 100; when the laser sensor measurement value h is less than k, y is negative, indicating that the top surface of the sensing plate 200 is higher than the rail plane of the rail 100. The controller 5 has a built-in battery, interface conversion, and can also communicate with a laptop computer to send detection information, facilitating data analysis by operators on the computer. The entire design is based on the original rail inspection instrument, resulting in low operating costs. It boasts advantages such as simple structure, independence without affecting the existing measurement functions and accuracy of the rail inspection instrument, ease of implementation, low cost, and high measurement accuracy.

[0022] like Figure 3 As shown, both the first laser sensor 3 and the second laser sensor 4 are electrically connected to the controller 5 via an RS485 interface. Specifically, the RS485 uses a differential signal transmission method, effectively suppressing common-mode interference by detecting the voltage difference between the two lines rather than the absolute level value.

[0023] like Figures 1-2 As shown, the frame 1 includes longitudinal beams 11 and crossbeams 12, which are connected to form a T-shaped structure. The first laser sensor 3 and the second laser sensor 4 are both mounted below the crossbeam 12. Specifically, the longitudinal beams 11 and crossbeams 12 are made of aluminum alloy profiles, which significantly reduces the overall weight while ensuring load-bearing capacity, facilitating field transport and operation. The first laser sensor 3 and the second laser sensor 4 are mounted below the crossbeam 12, ensuring that both are parallel to the sensing plate 200 and guaranteeing accurate measurement results.

[0024] like Figure 1 As shown, a guide rail 121 is provided below the crossbeam 12, and both the first laser sensor 3 and the second laser sensor 4 can be detachably mounted on the guide rail 121. Specifically, when the width of the sensing plate 200 changes, in order to match the width of the sensing plate 200, the operator can finely adjust the distance between the first laser sensor 3 and the second laser sensor 4 along the guide rail 121 so that they are always positioned above the sensing plate 200. Furthermore, after the first laser sensor 3 and the second laser sensor 4 have moved to the designated position, they are locked in place by locking bolts to prevent them from sliding freely on the guide rail 121.

[0025] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A railway track inspection instrument with induction plate measurement function, characterized in that: The device includes a frame, with wheels at the ends for sliding on two steel rails. A sensor plate is positioned between the two steel rails. A first laser sensor and a second laser sensor are mounted on the lower end face of the frame. The first and second laser sensors are located directly above the sensor plate and are used to measure the vertical distance from the sensor plate and feed the measurement information back to the controller on the frame. The distance between the first and second laser sensors is adjustable.

2. A railway track inspection instrument with induction plate measurement function as described in claim 1, characterized in that: Both the first laser sensor and the second laser sensor are electrically connected to the controller via an RS interface.

3. A railway track inspection instrument with induction plate measurement function as described in claim 1, characterized in that: The frame includes longitudinal beams and crossbeams, which are connected to form a T-shaped structure. The first laser sensor and the second laser sensor are both installed below the crossbeams.

4. A railway track inspection instrument with induction plate measurement function as described in claim 3, characterized in that: A guide rail is provided below the crossbeam, and both the first laser sensor and the second laser sensor can be detachably mounted on the guide rail.

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