Intelligent calibration device for inner side gauge of railway wheelsets

Abstract

This invention discloses an intelligent calibration device for railway wheelset inner gauges, comprising: a base; a pressure sensor disposed at one end along the length of the base; a movable probe disposed on the base and movably mounted thereon; an image acquisition device disposed on the base, including a camera for acquiring readings of the inner gauge of the railway wheelset being calibrated; and an information processing and motion control device, including a motor for driving the movable probe to move along the length of the base, measuring the displacement of the movable probe, acquiring the pressure value of the pressure sensor, and reading the image acquired by the camera and converting it into a digital signal. This invention improves the accuracy of railway wheelset inner gauge calibration, reduces labor intensity, and enables intelligent calibration of railway wheelset inner gauges.

Description

Technical Field

[0001] This invention relates to the field of measuring instrument calibration technology, and in particular to an intelligent calibration device for the inner side gauge of railway wheelsets. Background Technology

[0002] To ensure the relative clearance between railway wheels and the rails remains within acceptable limits, the inner distance of railway wheelsets needs frequent inspection. Therefore, the inner distance gauge used for this purpose is frequently used. This high frequency of use can easily lead to errors in the inner distance gauge, necessitating its calibration. Commonly used intelligent calibration devices for inner distance gauges require manual reading, which is prone to misreading and results in low accuracy in the calibration. Summary of the Invention

[0003] The main objective of this invention is to provide an intelligent calibration device for the inner side gauge of railway wheelsets, which aims to improve the accuracy of calibration of the inner side gauge of railway wheelsets.

[0004] To achieve the above objectives, the present invention proposes an intelligent calibration device for the inner side gauge of railway wheelsets, comprising:

[0005] Base;

[0006] A pressure sensor, wherein the pressure sensor is disposed at one end of the base along its length;

[0007] A movable probe is disposed on the base and is movably mounted on the base;

[0008] An image acquisition device is mounted on the base and includes a camera for acquiring readings of the inner distance ruler of the railway wheelset being inspected.

[0009] An information processing and motion control device includes a motor for driving the movable probe to move along the length of the base, measuring the displacement of the movable probe, acquiring the pressure value of the pressure sensor, and reading the image captured by the camera and converting it into a digital signal.

[0010] Furthermore, the intelligent calibration device for the inner side distance gauge of the railway wheelset also includes at least two V-shaped seats spaced apart on the line connecting the movable probe and the pressure sensor.

[0011] Furthermore, the intelligent calibration device for the inner side distance ruler of the railway wheelset also includes a height adjustment seat, which is disposed on the base and supports the base; the height adjustment seat is used to adjust the distance between the base and the ground; there are at least three height adjustment seats.

[0012] Optionally, the information processing and motion control device further includes a grating ruler, which is used to measure the displacement of the movable probe.

[0013] Optionally, the motor is a servo motor.

[0014] Optionally, the image acquisition device further includes a horizontal adjustment device and a height adjustment device. The height adjustment device is used to adjust the distance between the camera and the base, and the horizontal adjustment device is used to adjust the position of the camera in the direction of the line connecting the movable probe and the pressure sensor.

[0015] Optionally, the information processing and motion control device further includes an interactive display screen, which is a touch screen. The interactive display screen is used to enable users to input commands to the intelligent calibration device for the inner track gauge of the railway wheelset and to read data from the intelligent calibration device for the inner track gauge of the railway wheelset.

[0016] Optionally, the information processing and motion control device further includes a motor handwheel, which is used to control the movement of the movable probe when the motor is powered off.

[0017] Furthermore, the intelligent calibration device for the inner side distance gauge of the railway wheelset also includes a display screen, which is electrically connected to the information processing and motion control device. The display screen is used to display the data information processed by the information processing and motion control device.

[0018] Furthermore, the intelligent calibration device for the inner side gauge of the railway wheelset also includes a connector for connecting the information processing and motion control device to a computer, enabling the computer to send instructions to the intelligent calibration device for the inner side gauge of the railway wheelset and to read data from the intelligent calibration device for the inner side gauge of the railway wheelset.

[0019] This invention employs an image acquisition device and an information processing and motion control device to eliminate the need for manual reading of the inner track gauge during the calibration of railway wheelsets. This avoids calibration failures caused by misreading and improves the accuracy of the calibration. The camera in the image acquisition device captures an image of the inner track gauge, which contains the gauge's reading information. After receiving this image information, the information processing and motion control device uses a visual recognition method to identify the digital display and / or engraved image of the inner track gauge as a digital signal. This eliminates the need for manual reading of the inner track gauge, improving the accuracy of the calibration. The elimination of manual reading reduces labor intensity. Furthermore, because the information processing and motion control device has a visual recognition method, intelligent calibration of the inner track gauge is achieved. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a front view of an embodiment of the intelligent calibration device for the inner side gauge of railway wheelsets according to the present invention;

[0022] Figure 2 This invention relates to an intelligent calibration device for the inner side gauge of railway wheelsets. Figure 1 Top view of the Chinese embodiment;

[0023] Figure 3 This invention relates to an intelligent calibration device for the inner side gauge of railway wheelsets. Figure 1 Side view of the embodiment.

[0024] Explanation of icon numbers:

[0025]

[0026] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0028] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0029] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0030] This invention proposes an intelligent calibration device for the inner side distance gauge of railway wheelsets.

[0031] In an embodiment of the present invention, reference is made to Figures 1 to 3 The intelligent calibration device for the inner side gauge of the railway wheelset includes:

[0032] Base 10;

[0033] Pressure sensor 11 is disposed at one end of the base 10 along its length.

[0034] The movable probe 12 is mounted on the base 10 and is movably installed on the base 10.

[0035] Image acquisition device 20 is mounted on base 10. Image acquisition device 20 includes camera 21, which is used to acquire the reading of the inner distance ruler of the railway wheelset being inspected.

[0036] The information processing and motion control device 30 includes a motor for driving the movable probe 12 to move along the length of the base 10. The information processing and motion control device 30 is used to measure the displacement of the movable probe 12, acquire the pressure value of the pressure sensor 11, and read the image captured by the camera 21 and convert it into a digital signal.

[0037] The distance between the movable probe 12 and the pressure sensor 11 in the initial position is fixed, so it can be considered that the distance between the movable probe 12 and the pressure sensor 11 in the initial position is known. When it is necessary to calibrate the inner track gauge of the railway wheelset, the inner track gauge of the railway wheelset is first placed between the movable probe 12 and the pressure sensor 11, with the length direction of the inner track gauge parallel to the line connecting the movable probe 12 and the pressure sensor 11. The motor drives the movable probe 12 to move towards the pressure sensor 11, and finally the movable probe 12 abuts against the inner track gauge of the railway wheelset, and pushes the inner track gauge of the railway wheelset to abut against the pressure sensor 11 as well. After the pressure sensor 11 senses the pressure, it transmits the pressure value to the information processing and motion control device 30. After the information processing and motion control device 30 senses that the pressure value has reached the required pressure value, it stops the motor movement, causing the movable probe 12 to stop. The information processing and motion control device 30 measures the displacement of the movable probe 12 towards the pressure sensor 11. Subtracting this displacement from the distance between the movable probe 12 and the pressure sensor 11 at the initial position yields the length of the inner wheelbase gauge. Since the inner wheelbase gauge is used to measure distance, this length should also be the current reading on the gauge. The image acquisition device 20 acquires an image of the inner wheelbase gauge reading. Note that the reading on the inner wheelbase gauge may be a digital reading displayed on a screen or a mechanically engraved reading, but the information processing and motion control device 30 can convert it into a digital signal using visual recognition methods. The deviation between the length of the inner wheelbase gauge and its reading is the length that the inner wheelbase gauge needs to be corrected for. The pressure sensor 11 value can be read in real-time using a 32-bit MCU STM32F103VC6.

[0038] refer to Figures 1 to 3Furthermore, the intelligent calibration device for the inner track gauge of the railway wheelset also includes at least two V-shaped seats 13 spaced apart on the line connecting the movable probe 12 and the pressure sensor 11. The V-shaped seats 13 are used to receive the inner track gauge. The inner track gauge may be cylindrical, making it difficult to place on a flat surface. During calibration, the movable probe 12 may push the inner track gauge a distance along its length. If the position of the inner track gauge is not restricted, it may fail to make contact with the movable probe 12 and the pressure sensor 11; or the length direction of the inner track gauge may not be entirely along the line connecting the movable probe 12 and the pressure sensor 11. In this case, the reading of the inner track gauge may not be equal to the distance between the pressure sensor 11 and the movable probe 12, leading to calibration failure. Therefore, at least two V-shaped seats 13 ensure that the inner distance gauge of the railway wheelset can only move along the line connecting the V-shaped seats 13. Since the line connecting the V-shaped seats 13 is the same as the line connecting the movable probe 12 and the pressure sensor 11, the inner distance gauge of the railway wheelset always moves along its length, thus improving the success rate of the verification.

[0039] refer to Figures 1 to 3 Furthermore, the intelligent calibration device for the inner track gauge of railway wheelsets also includes a height adjustment seat 14, which is mounted on the base 10 and supports the base 10. The height adjustment seat 14 is used to adjust the distance between the base 10 and the ground; there are at least three height adjustment seats 14. During the calibration of the inner track gauge of railway wheelsets, it is best to keep the base 10 level. If the base 10 cannot be kept level, the inner track gauge of the railway wheelsets may tend to slide to one side. If the sliding tendency is towards the movable probe 12, it may put additional pressure on the motor. If the sliding tendency is towards the pressure sensor 11, the pressure sensor 11 may sense an incorrect pressure signal, causing the motor to stop prematurely, preventing the inner track gauge of the railway wheelsets from simultaneously contacting the movable probe 12 and the pressure sensor 11. Geometrically, three non-collinear points can determine a plane; therefore, using three non-collinear height adjustment seats 14 can adjust the base 10 to a level state. The height adjustment seat 14 is a commonly used device in the mechanical field, so its structure will not be described in detail. To increase the stability of the base 10 and reduce the weight borne by a single height adjustment seat 14, more height adjustment seats 14 can be installed.

[0040] refer to Figures 1 to 3Optionally, the information processing and motion control device 30 also includes a grating ruler, which is used to measure the displacement of the movable probe 12. The grating ruler measures displacement using moiré fringes and is a very precise displacement measurement tool. The method of measuring displacement using a grating ruler is common knowledge and will not be elaborated further. The measurement accuracy of the grating ruler is several orders of magnitude higher than that of the railway wheelset inner distance ruler. Therefore, the actual length of the railway wheelset inner distance ruler measured by the grating ruler is sufficient to meet the requirements for calibration of the railway wheelset inner distance ruler. In practice, the movable probe 12 can be linked with the moving scale of the grating ruler, so that the displacement of the moving scale is equal to the displacement of the movable probe 12. Thus, the displacement of the movable probe 12 can be measured using the grating ruler.

[0041] refer to Figures 1 to 3 Optionally, the motor can be a servo motor. A high-precision servo motor can be used, and a microcontroller can control its movement via PWM. When the microcontroller employs a PID closed-loop algorithm, the motion accuracy can reach 0.02mm. This motion accuracy of pushing the inner track gauge of the railway wheelset is far greater than that of manually pushing it, thus enabling better calibration.

[0042] refer to Figures 1 to 3 Optionally, the image acquisition device 20 also includes a horizontal adjustment device and a height adjustment device. The height adjustment device is used to adjust the distance between the camera 21 and the base 10, and the horizontal adjustment device is used to adjust the position of the camera 21 in the direction of the line connecting the movable probe 12 and the pressure sensor 11. To improve shooting accuracy, a fixed-focus camera 21 may be used. In this case, it is necessary to adjust the distance between the camera 21 and the inner track gauge of the railway wheelset to adjust the image clarity. For mechanical inner track gauges of railway wheelsets, when taking readings, it is essential to ensure that the camera 21 is aligned with its scale line. At this time, the horizontal adjustment device can adjust the horizontal displacement of the camera 21 to align the camera 21 with the scale line of the inner track gauge of the railway wheelset. Both the horizontal adjustment device and the height adjustment device are commonly used structures in the mechanical field, so their structures will not be described in detail here. Figures 1 to 3 As shown, the horizontal adjustment device and the vertical adjustment device are integrated into the same device, and the horizontal and vertical positions of the camera 21 are adjusted by the horizontal adjustment handwheel 22 and the vertical adjustment handwheel 23.

[0043] refer to Figures 1 to 3Optionally, the information processing and motion control device 30 also includes an interactive display screen 31, which is a touchscreen. The interactive display screen 31 allows the user to input commands to the intelligent calibration device for the inner track gauge of the railway wheelset and to read data from the device. After the user places the inner track gauge of the railway wheelset in the preset position on the intelligent calibration device, the information processing and motion control device 30 can control the motor to start moving the movable probe 12 via the interactive display screen 31. When the movable probe 12 is pressed against the inner track gauge, the user adjusts the camera 21 to an appropriate position and can input commands via the interactive display screen 31 to control the camera 21 to start shooting and perform subsequent information processing. The interactive display screen 31 can also output measurement data, such as the reading of the inner track gauge identified by image recognition, which can be displayed on the interactive display screen 31, and the actual measured length of the inner track gauge can also be displayed on the interactive display screen 31.

[0044] refer to Figures 1 to 3 Optionally, the information processing and motion control device 30 also includes a motor handwheel 40, which is used to control the movement of the movable probe 12 when the motor is powered off. The motor handwheel 40 can be used to zero the intelligent calibration device for the inner track gauge of the railway wheelset. The specific process is as follows: First, adjust the base 10 to be horizontal. Then, place a calibration rod of known length at the same position as when the inner track gauge of the railway wheelset is being calibrated. Adjust the movable probe 12 by using the motor handwheel 40 so that the movable probe 12 and the pressure sensor 11 simultaneously contact the calibration rod. At this time, the distance between the pressure sensor 11 and the movable probe 12 should be equal to the length of the calibration rod. Reset the reading of the grating ruler at this time to complete the calibration of the intelligent calibration device for the inner track gauge of the railway wheelset.

[0045] Furthermore, the intelligent calibration device for the inner track gauge of railway wheelsets also includes a display. The display is electrically connected to the information processing and motion control device, and is used to display the data processed by the information processing and motion control device. In practical use, to facilitate engineers in calibrating the inner track gauge of railway wheelsets and to facilitate timely reading of the measurement values ​​from the intelligent calibration device, a display is specifically provided. The data that the display can show includes, but is not limited to, the reading of the inner track gauge, the distance between the movable probe and the pressure sensor, the pressure value of the pressure sensor, and the difference between the inner track gauge reading and the distance between the movable probe and the pressure sensor. Of course, it can also display only a single value that is helpful for engineers to adjust the inner track gauge of railway wheelsets.

[0046] Furthermore, the intelligent verification device for the inside diameter gauge of railway wheelsets further includes a connector. The connector is used to connect the information processing and motion control device to the computer, enabling the computer to send instructions to the intelligent verification device for the inside diameter gauge of railway wheelsets and read data from the device. The intelligent verification device for the inside diameter gauge of railway wheelsets may include its host computer to further enhance its computing power. The host computer can be a computer, and the connector can be a serial port and wires, or a Bluetooth module, a wireless network module, etc. that can communicate with the computer. The computer can have software配套 to the intelligent verification device for the inside diameter gauge of railway wheelsets. The配套 software can rely on the computing power of the computer to enhance the control of the motor, enhance the image recognition ability, and automatically generate a report form based on the data detected by the intelligent verification device for the inside diameter gauge of railway wheelsets, facilitating the calibration of the inside diameter gauge of railway wheelsets by engineers. The report form can include data such as the error value of the inside diameter gauge of railway wheelsets.

[0047] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. An intelligent calibration device for the inner side gauge of a railway wheelset, characterized in that, include: Base; A pressure sensor, wherein the pressure sensor is disposed at one end of the base along its length; A movable probe is disposed on the base and is movably mounted on the base; An image acquisition device is mounted on the base and includes a camera for acquiring readings of the inner distance ruler of the railway wheelset being inspected. An information processing and motion control device includes a motor and a grating ruler; the motor is a servo motor and is used to drive the movable probe to move along the length direction of the base; the information processing and motion control device is used to measure the displacement of the movable probe, and is also used to acquire the pressure value of the pressure sensor, and to read the image captured by the camera and convert it into a digital signal; the grating ruler is used to measure the displacement of the movable probe. and A height-adjustable seat is provided on the base and supports the base; the height-adjustable seat is used to adjust the distance between the base and the ground; there are at least three height-adjustable seats; the height-adjustable seats are used to adjust the base to be level.

2. The intelligent calibration device for the inner side gauge of railway wheelsets as described in claim 1, characterized in that, The intelligent calibration device for the inner side distance gauge of the railway wheelset also includes at least two V-shaped seats spaced apart on the line connecting the movable probe and the pressure sensor.

3. The intelligent calibration device for the inner side gauge of railway wheelsets as described in claim 1, characterized in that, The image acquisition device also includes a horizontal adjustment device and a height adjustment device. The height adjustment device is used to adjust the distance between the camera and the base, and the horizontal adjustment device is used to adjust the position of the camera in the direction of the line connecting the movable probe and the pressure sensor.

4. The intelligent calibration device for the inner side gauge of railway wheelsets as described in claim 1, characterized in that, The information processing and motion control device also includes an interactive display screen, which is a touch screen. The interactive display screen is used to enable users to input commands to the intelligent calibration device for the inner side gauge of the railway wheelset and to read data from the intelligent calibration device for the inner side gauge of the railway wheelset.

5. The intelligent calibration device for the inner side gauge of railway wheelsets as described in claim 1, characterized in that, The information processing and motion control device also includes a motor handwheel, which is used to control the movement of the movable probe when the motor is powered off.

6. The intelligent calibration device for the inner side gauge of railway wheelsets as described in claim 1, characterized in that, The intelligent calibration device for the inner side distance gauge of the railway wheelset also includes a display screen, which is electrically connected to the information processing and motion control device. The display screen is used to display the data information processed by the information processing and motion control device.

7. The intelligent calibration device for the inner side gauge of railway wheelsets as described in claim 1, characterized in that, The intelligent calibration device for the inner side gauge of the railway wheelset also includes a connector for connecting the information processing and motion control device to a computer, enabling the computer to send instructions to the intelligent calibration device for the inner side gauge of the railway wheelset and to read data from the intelligent calibration device for the inner side gauge of the railway wheelset.

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