Method and apparatus for measuring locking surface fitting force in turnout locking, and device

Abstract

Disclosed in the present invention are a method and apparatus for measuring locking surface fitting force in turnout locking, and a device, relating to the technical field of turnout locking measurement. The method comprises: reading state data of a switching or locked state of a turnout; reading pressure data of a pressure sensor which is pre-disposed between a locking iron and a locking frame; when the turnout is currently in the switching state, taking pressure data of a corresponding side as a fastening bolt action effect numerical value of the corresponding side, thereby defining the fastening bolt action effect numerical value; and when the turnout is switched to the locked state, on the basis of normal locking or reverse locking, and according to the difference between current pressure data of the corresponding side and the fastening bolt action effect numerical value of the corresponding side, determining an accurate locking surface fitting force. The present invention eliminates the influence of pressure generated by fastening bolts on locking surface fitting force measurement and can obtain highly precise locking surface fitting force measurement results, increasing control accuracy with respect to close-fit parameters and locking surface fitting force.

Description

A method, device and apparatus for detecting the contact force of the locking surface of a turnout lock Technical Field

[0001] The present application relates to the technical field of turnout locking detection, and in particular to a method, device and equipment for detecting the locking surface contact force of a turnout lock. Background Art

[0002] Generally, the switch point rail (point rail) and stock rail (wing rail) must meet the close contact requirements and be securely locked to meet the basic conditions for vehicle passage. The locking methods of the movable part of the switch are currently divided into internal locking and external locking. Internal locking is a switch locking method that uses connecting rods and a locking mechanism inside the switch machine to fix the movable part of the switch in a set position. External locking is a switch locking method that uses a mechanical structure based on the fixed part of the switch to lock the movable part with the fixed part together.

[0003] In early locking systems, the tightness of contact between the movable and fixed parts of a turnout is described by the contact force. The railway industry standard TB / T2895-1997, "Contact Force of Turnout Conversion Resistance," defines contact force. Contact force is the pressure exerted by the movable component on the stock rail (wing rail) at the center of the turnout's pull point after the turnout's movable part has transitioned to close contact with the stock rail (wing rail). For internally locked turnouts, the expected contact force is 1000N ± 500N; for externally locked turnouts, the expected contact force is zero.

[0004] For internally locked turnouts, the locking mechanism of the switch locks the movable part of the turnout. The turnout rebound force and adhesion force act on the locking surface of the internal locking mechanism of the switch, such as between the locking arc of the locking gear and rack block of the ZD6 switch, and between the locking iron and the locking inclined surface of the locking block of the ZD9 / ZDJ9 switch.

[0005] For external locking turnouts, the external locking device locks the movable part of the turnout, and the turnout rebound force and adhesion force act between the contact surfaces of the locking iron and the lock hook of the external locking device.

[0006] It can be seen that the contact force is generated by the locking mechanism (switch machine or external lock) and maintained by the contact force of the locking surface of the locking mechanism. This is true for both internal and external lock types of turnout locking. When there is a rebound force on the turnout, the locking mechanism overcomes the rebound force and generates a contact force between the point rail and the stock rail or the heart rail and the wing rail. When the rebound force and the contact force are relatively large, a relatively large contact force is generated between the locking surfaces of the locking mechanism, which generates a large friction force between the locking surfaces of the locking mechanism. When the driving force is insufficient to overcome this friction force, the locking mechanism may fail to lock or unlock, eventually leading to a turnout switching failure and affecting vehicle operation. Sometimes, the locking mechanism can still unlock and lock, but the contact force between the locking surfaces is relatively large, which may accelerate the wear of the locking surfaces and even cause abnormal wear.

[0007] In actual applications, due to factors such as turnout manufacturing, laying, application, adjustment, wheel-rail interaction, and natural environment, it is difficult to ensure that the close contact force is zero while ensuring the close contact parameters. Or due to other factors, when the close contact force is zero, the interaction force between the locking iron and the locking hook contact surface is still very large, affecting the unlocking, locking and service life of the external locking device. It can be seen that for external locking turnouts, controlling various close contact parameters while controlling the interaction force between the locking iron and the locking hook contact surface to a small value has a good effect on the normal operation of the external locking.

[0008] Therefore, China State Railway Group Co., Ltd. has the following regulations regarding the proper adjustment of externally locked turnouts: 1. The gap between the tip of the point rail and the point rail and the first traction point should not exceed 0.5mm, and the gap should not exceed 1.0mm in the remaining sections. 2. The locking hook and locking rod should be able to swing slightly left and right, or use a tool 350mm-450mm long to pry the tip of the point rail (point rail) against the inner side of the rail waist, with the gap increasing by 0.5mm-1.0mm. After releasing the tool, the point rail (point rail) should automatically rebound.

[0009] It can be seen that the requirement for switch adjustment is to ensure that the point rail and the base rail, the heart rail and the wing rail are in close contact, and to check that the lock hook and the locking rod can swing moderately. In fact, it is to check and confirm that there is no excessive friction between the locking-related fitting surfaces, and ultimately to ensure that the pressure between the locking-related fitting surfaces is not very high. Or it is to check the degree of separability between the point rail and the base rail, and ultimately to ensure the fitting pressure between the lock hook and the locking iron locking surface. That is, whether it is an internal locking switch or an external locking switch, it is necessary to ensure the close contact parameters between the point rail and the base rail, the heart rail and the wing rail, and at the same time control the locking surface fitting force. This method is highly maneuverable on site and is simple and easy to implement.

[0010] However, manual inspection methods lack specific parameters and rely heavily on personal experience, resulting in inconsistent standards during implementation. Furthermore, turnouts operate in complex environments, harsh operating conditions, and poor stability. The locking surface contact force of the external lock is subject to high probability and frequency of change. If this force fluctuates significantly between inspections and adjustments, it can lead to turnout failure. Continuously monitoring this change allows for timely identification of trends, enabling adjustments to be made before a failure occurs, ultimately minimizing the impact on vehicle operation.

[0011] A method for detecting the close contact force of railway turnouts has been proposed in the prior art. A special force sensor is installed at the locking iron adjustment plate (between the locking iron and the locking frame) to reflect the close contact force of the turnout, providing a quantitative basis for on-site close contact adjustment and maintenance.

[0012] However, the force measured by the current railway turnout adhesion force detection method is mainly generated by the turnout adhesion force and rebound force, and the pressure generated by the tightening bolts cannot be eliminated. In other words, the current railway turnout adhesion force detection method cannot accurately reflect the turnout adhesion force and cannot be used as a basis for controlling the adhesion parameters and the locking surface adhesion force. At the same time, the environment in which the turnout is usually located is complex, the working conditions are harsh, and the stability is poor. The possibility and frequency of changes in the external locking surface adhesion force are high. If the change trend cannot be determined in time, it may cause turnout switching failure and have an adverse effect on vehicle operation. Therefore, in actual application, controlling the locking surface adhesion force is more conducive to the normal operation of the turnout than controlling the turnout adhesion force, and the adhesion parameters can be guaranteed by controlling the locking surface adhesion force. At present, there is still a lack of methods for directly detecting the locking surface adhesion force of the turnout. Summary of the Invention

[0013] Based on this, it is necessary to provide a method, device and equipment for detecting the locking surface contact force of a turnout lock in order to address the above technical problems.

[0014] This manual adopts the following technical solutions:

[0015] This specification provides a method for detecting the contact force of the locking surface of a turnout lock. In the turnout locking structure, a locking frame is installed on one side of a stock rail / wing rail by fastening bolts, a locking iron is installed outside the locking frame, a locking hook is connected to a point rail / heart rail, and the point rail / heart rail is located on the other side of the stock rail / wing rail; the locking hook is driven to move by the movement of a locking rod until the point rail / heart rail connected to the locking hook is in close contact with the stock rail / wing rail, and the locking hook applies pressure to the inclined surface of the locking iron to keep the stock rail / wing rail and the point rail / heart rail in close contact; the contact surface between the locking hook and the inclined surface of the locking iron is the locking surface; the turnout locking state includes a positioning locking state and a reverse locking state according to the relative positions of the stock rail / wing rail and the point rail / heart rail; the method includes:

[0016] Read the status data reflecting whether the turnout is in the switching or locking state;

[0017] Read the positioning pressure data between the locking iron on the positioning side and the locking frame on the positioning side, and read the reverse pressure data between the locking iron on the reverse side and the locking frame on the reverse side;

[0018] Determine whether the turnout is currently in a switching state based on the status data;

[0019] If so, the current positioning pressure data is determined to be the real-time positioning side tightening bolt effect value, and the current reverse position pressure data is determined to be the real-time reverse position side tightening bolt effect value;

[0020] If not, when the turnout is in the positioning locked state, the locking surface contact force of the positioning side locking iron is determined based on the difference between the current positioning pressure data and the real-time positioning side fastening bolt effect value; or when the turnout is in the reverse locking state, the locking surface contact force of the reverse side locking iron is determined based on the difference between the current reverse pressure data and the real-time reverse side fastening bolt effect value.

[0021] Optionally, the method further includes:

[0022] When the turnout is in the positioned locked state, the current counter-position pressure data is determined as the real-time counter-position side fastening bolt effect value; and when the turnout is in the reverse locked state, the locking surface contact force of the counter-position side locking iron is determined based on the difference between the current counter-position pressure data and the real-time counter-position side fastening bolt effect value;

[0023] When the turnout is in the reverse locked state, the current positioning pressure data is determined as the real-time positioning side fastening bolt effect value, and when the turnout is in the positioned locked state, the locking surface contact force of the positioning side locking iron is determined based on the difference between the current positioning pressure data and the real-time positioning side fastening bolt effect value.

[0024] Optionally, the method further includes:

[0025] caching the positioning side fastening bolt effect values ​​at multiple moments according to a preset data volume, and calculating the average of the positioning side fastening bolt effect values ​​at multiple moments as the real-time positioning side fastening bolt effect value; and / or,

[0026] The counter-side tightening bolt effect values ​​at multiple moments are cached according to a preset data amount, and the average value of the counter-side tightening bolt effect values ​​at multiple moments is calculated as the real-time counter-side tightening bolt effect value.

[0027] Optionally, the method further includes:

[0028] Determine whether the real-time positioning side tightening bolt effect value is less than the preset tightening threshold; if so, issue an alarm for the positioning side tightening bolt;

[0029] Determine whether the real-time effect value of the tightening bolt on the reverse side is less than the preset tightening threshold; if so, issue an alarm for the tightening bolt on the reverse side.

[0030] Optionally, the method further includes:

[0031] caching the positioning side tightening bolt effect values ​​and / or the counter-position side tightening bolt effect values ​​at multiple moments according to a preset data volume, and analyzing the changing trends of the positioning side tightening bolt effect values ​​and / or the counter-position side tightening bolt effect values;

[0032] Based on the difference between the preset standard change trend and the change trend of the numerical value of the effect of the positioning side fastening bolt, it is judged whether the positioning side fastening bolt is abnormal. If so, an alarm is issued for the positioning side fastening bolt; and / or based on the difference between the preset standard change trend and the change trend of the numerical value of the effect of the reverse side fastening bolt, it is judged whether the reverse side fastening bolt is abnormal. If so, an alarm is issued for the reverse side fastening bolt.

[0033] Optionally, the switch is detected in the switching or locking state by a status sensor preset in the switch machine; the positioning pressure data between the positioning side locking iron and the positioning side locking frame is obtained by a positioning side pressure sensor preset between the positioning side locking iron and the positioning side locking frame; the reverse position pressure data between the reverse position locking iron and the reverse position locking frame is obtained by a reverse position side pressure sensor preset between the reverse position locking iron and the reverse position locking frame.

[0034] This specification provides a device for detecting the contact force of a locking surface of a turnout lock, comprising:

[0035] A state sensor is installed in the switch machine to detect whether the switch is in the switching or locking state;

[0036] A positioning pressure sensor is provided between the positioning locking iron and the locking frame;

[0037] A reverse position pressure sensor is provided between the reverse position locking iron and the locking frame;

[0038] A state reading module is used to read state data from the state sensor, read positioning pressure data from the positioning pressure sensor, and read reverse position pressure data from the reverse position pressure sensor;

[0039] The judgment and calculation module is used to judge whether the switch is currently in a switching state based on the status data. If so, the current positioning pressure data is determined to be the real-time positioning side fastening bolt effect value, and the current reverse position pressure data is determined to be the real-time reverse position fastening bolt effect value; if not, when the switch is in the positioning locking state, the locking surface contact force of the positioning side locking iron is determined based on the difference between the current positioning pressure data and the real-time positioning side fastening bolt effect value; or when the switch is in the reverse position locking state, the locking surface contact force of the reverse position locking iron is determined based on the difference between the current reverse position pressure data and the real-time reverse position fastening bolt effect value.

[0040] This specification provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it implements the above-mentioned method for detecting the locking surface contact force of the switch lock.

[0041] This specification provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the method for detecting the contact force of the locking surface of the switch lock is implemented.

[0042] At least one of the above technical solutions adopted in this specification can achieve the following beneficial effects:

[0043] First, read the status data of the switch in the conversion or locking state, and read the positioning pressure data between the positioning side locking iron and the positioning side locking frame, as well as the reverse position pressure data between the reverse position side locking iron and the reverse position side locking frame. When it is determined based on the status data that the switch is currently in the conversion state, the pressure data on the corresponding side is used as the effect value of the fastening bolt on the corresponding side, thereby clarifying the pressure generated by the fastening bolt. When it is detected that the switch is switched to the locked state, based on the positioning locking state or the reverse locking state, the accurate locking surface contact force is determined according to the difference between the current pressure data on the corresponding side and the effect value of the fastening bolt on the corresponding side. The present invention eliminates the influence of the pressure generated by the fastening bolt on the locking surface contact force detection, and can obtain a high-precision locking surface contact force detection result, so as to improve the control accuracy of the close contact parameters and the locking surface contact force. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0045] FIG1 is a schematic diagram of a lock hook and a locking rod inspection provided in this specification;

[0046] FIG2 is a schematic diagram of an inspection of the inner side of the waist of a point rail provided in this specification;

[0047] FIG3 is a schematic diagram of rebound force, adhesion force and locking surface adhesion force provided in this specification;

[0048] FIG4 is a schematic flow chart of a method for detecting the contact force of a locking surface of a turnout lock provided in this specification;

[0049] FIG5 is a schematic diagram of a sensor setting and locking mechanism provided in this specification;

[0050] FIG6 is a schematic diagram of a locking surface contact force detection device for a turnout lock provided in this specification;

[0051] FIG7 is a schematic diagram of a computer device for implementing a method for detecting the locking surface contact force of a turnout lock provided in this specification. DETAILED DESCRIPTION

[0052] To make the purpose, technical solutions, and advantages of this specification more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the specific embodiments of this specification and the corresponding drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0053] For the sake of convenience, the following description will only be based on the stock rail and the point rail. In practical applications, the locking surface contact force detection method provided by the present invention can also be applied to the wing rail and the center rail.

[0054] To check whether the adjustment of the external locking turnout is appropriate, refer to Figure 1 or Figure 2. Figure 1 is a schematic diagram of a locking hook and locking rod inspection as described in this manual. The locking hook and locking rod in the middle of Figure 1 should be able to swing appropriately left and right. Figure 2 is a schematic diagram of a switch rail tip waist inspection as described in this manual. In Figure 2, when a tool 350mm-450mm long is used to pry outward against the inside of the switch rail tip waist, the gap should increase by 0.5mm-1.0mm. After release, the switch rail should automatically rebound.

[0055] At present, Tonghao Design Institute has disclosed a railway turnout adhesion detection method and system, in which a special force sensor is installed at the locking iron adjustment piece (between the locking iron and the locking frame) to reflect the turnout adhesion and provide a quantitative basis for on-site adhesion adjustment and maintenance. However, this method cannot directly reflect the turnout adhesion. First, the force at the measured position is mainly generated by the turnout adhesion and rebound force, and the rebound force of the same group of turnouts will also change, and the rebound force of different turnouts is also different. Therefore, the transfer function of the turnout adhesion and the pressure at the measured position needs to correspond to the turnout one-to-one, and the transfer function needs to be corrected regularly. Secondly, the pressure generated by the tightening bolts cannot be eliminated, and its proportion in the measured pressure data is not fixed and clear, which further increases the complexity of the transfer function of the turnout adhesion and the pressure at the measured position and the non-correlation between the two. It can be seen that it is difficult to reflect the turnout adhesion using the pressure at the measured position.

[0056] To ensure the proper function of a turnout, it's not only necessary to ensure tight contact between the turnouts but also to control the friction between the locking parts' mating surfaces. This tight contact can be controlled using mechanical clearance checks. The friction between the locking parts' mating surfaces is proportional to the pressure between them. Because both the static friction after locking and the dynamic friction during the locking and unlocking processes are difficult to measure, let alone continuously online, it's necessary to measure the pressure between the locking parts' mating surfaces to reflect the friction. This pressure can then be controlled to control the friction between the mating surfaces.

[0057] However, the force at the position measured by the current railway turnout adhesion detection method is mainly generated by the adhesion force of the turnout and the rebound force. The rebound force of the same set of turnouts will also vary, and the rebound force of different turnouts is also different. Therefore, the transfer function of the turnout adhesion force and the pressure at the measured position needs to correspond to the turnout one-to-one, and the transfer function needs to be corrected regularly. In addition, the current detection method cannot eliminate the pressure generated by the tightening bolts, and its proportion in the measured pressure data is not fixed and clear. In summary, the current railway turnout adhesion detection method cannot accurately reflect the adhesion force of the turnout.

[0058] Figure 3 is a schematic diagram of the rebound force, adhesion force, and locking surface contact force used in this specification. As shown in Figure 3, F1 represents the contact force acting on the switch rail, F2 represents the rebound force of the switch rail, and F3 represents the locking surface contact force acting on the locking surface of the locking iron. F3 can be transmitted to the locking frame. By placing a pressure sensor between the locking iron and the locking frame, pressure data proportional to F3 can be measured. Understanding this proportional relationship can determine the value of F3, or the value of F3 can be controlled directly based on the value measured by the pressure sensor based on experience and experimental data.

[0059] Furthermore, if the rebound force F2 is measured, the contact force F1 can be calculated. If the transfer coefficient of the contact force F1 at the pressure sensor is measured, that is, the numerical relationship between a certain contact force F1 and the pressure sensor, the resultant force of the rebound force F2 and the contact force F1 can be calculated based on the pressure sensor data.

[0060] It is feasible to set a pressure sensor between the locking iron and the locking frame to continuously detect the force exerted by the locking iron on the locking frame. However, the pressure value measured there includes the effect of the tightening bolts, and the force generated by the tightening bolts changes with temperature and will also change due to the stress generated when the vehicle passes. Therefore, it is necessary to study a measurement or calculation method for the pressure value between the locking iron and the locking frame that can eliminate or offset the force of the bolts. In this way, there is a relatively fixed and clear relationship between the measured value and the mutual pressure between the mating surfaces of the locking parts. Furthermore, there is also a relatively fixed and clear relationship between the measured value and the friction between the mating surfaces of the locking parts. Ultimately, the measured value can be used to reflect the pressure and friction between the mating surfaces of the locking parts, and the measured value can be used as a quantitative indicator for adjusting and controlling the pressure between the mating surfaces of the locking parts.

[0061] The following describes in detail the technical solutions provided by various embodiments of the present application in conjunction with the accompanying drawings.

[0062] FIG4 is a flow chart of a method for detecting the contact force of a locking surface of a turnout lock in this specification, which specifically includes the following steps:

[0063] S101: Reading status data reflecting whether the turnout is in a switching or locking state.

[0064] S102: Reading the positioning pressure data between the positioning side locking iron and the positioning side locking frame, and reading the reverse position pressure data between the reverse position side locking iron and the reverse position side locking frame.

[0065] Generally, in a turnout locking structure, a locking frame is mounted on one side of the base rail / wing rail using fastening bolts, a locking iron is mounted outside the locking frame, and a locking hook is connected to the point rail / heart rail, with the point rail / heart rail located on the other side of the base rail / wing rail. The locking hook is driven by the movement of the locking rod until the point rail / heart rail connected to the locking hook is in close contact with the base rail / wing rail. The locking hook then applies pressure to the inclined surface of the locking iron to maintain close contact between the base rail / wing rail and the point rail / heart rail. The contact surface between the locking hook and the inclined surface of the locking iron is the locking surface. The turnout locking state includes a fixed locking state and a reverse locking state, depending on the relative positions of the base rail / wing rail and the point rail / heart rail.

[0066] Based on this, when detecting the switching or locking status of the turnout, a status sensor can be set at the corresponding position in the switch machine according to the detection needs.

[0067] Based on this, in one or more embodiments of this specification, sensors may be pre-installed within the switch to detect whether the switch is in the switching or locked state, thereby enabling different processing based on the different states. Alternatively, sensors may be installed on components related to the external locking device to monitor parameters that distinguish between the switching and locked states of the switch. For example, a displacement sensor may be installed on the switch operating rod to monitor its displacement to determine whether the switch is in the switching or locked state. An ammeter may be installed on the motor to monitor its operating current to determine when the switch begins operating, after a fixed delay, unlocking the switch and initiating switching. A displacement sensor may also be installed on the locking rod of the external locking device to monitor its displacement, determining whether the switch is in the switching or locked state based on this displacement data. A displacement sensor may also be installed on the indicator rod to monitor its movement, with movement of the indicator rod indicating that the switch is unlocked, and so on. The specific method employed can be determined based on needs and is not limited in this specification.

[0068] On the other hand, in order to detect the contact force of the locking surface of the turnout, a pressure sensor can be pre-installed between the locking iron and the locking frame to detect the effect of the force of the locking hook and the force of the fastening bolt on the inclined surface of the locking iron on the sensor when the turnout is locked, as shown in Figure 5.

[0069] Figure 5 is a schematic diagram of a sensor arrangement and locking mechanism described in this specification. The left-side locking corresponds to the positioning lock, while the right-side locking corresponds to the reverse locking. As can be seen from Figure 5 , it shows a locking rod 1, a positioning-side pressure sensor 2, a reverse-side pressure sensor 3, a lock hook 4, a locking iron 5, and a locking frame 6. The left-side lock hook is the positioning-side lock hook, the right-side lock hook is the reverse-side lock hook, the left-side locking iron is the positioning-side locking iron, the left-side locking frame is the positioning-side locking frame, the right-side locking iron is the reverse-side locking iron, and the right-side locking frame is the reverse-side locking frame.

[0070] A positioning pressure sensor is pre-installed between the positioning locking iron and the positioning locking frame. This sensor collects positioning pressure data between the positioning locking iron and the positioning locking frame. Furthermore, a reverse pressure sensor is pre-installed between the reverse locking iron and the reverse locking frame. This sensor collects reverse pressure data between the reverse locking iron and the reverse locking frame. The service platform server can then read the required data in real time to test the locking surface contact force of the turnout lock.

[0071] The server can read the status data of the status sensor according to the preset data reading frequency to subsequently determine the switch status, and read the positioning pressure data of the positioning side pressure sensor and the reverse pressure data of the reverse side pressure sensor for subsequent locking surface fitting force calculation.

[0072] The server mentioned in this specification can be a server set up on the business platform, or a device such as a desktop computer, laptop computer, single-chip microcomputer, MCU, etc. that can execute the solution of this specification. For the sake of convenience, the following description only uses the server as the execution subject.

[0073] S103: Determine whether the switch is currently in a switching state based on the status data. If so, execute step S104; if not, execute step S105.

[0074] S104: determining the current positioning pressure data as a real-time positioning side tightening bolt effect value, and determining the current reverse position pressure data as a real-time reverse position side tightening bolt effect value.

[0075] After reading the status data representing the status of the switch, the server can determine the current status of the switch based on the status data. When the switch is in the switching state, the locking inclined surface of the positioning side locking iron / the reverse side locking iron is not subjected to the hook lock pressure. At this time, although the pressure value of the positioning side sensor / the reverse side sensor is not necessarily completely equal to the force of the fastening bolt, the measured pressure data is the effect value of the fastening bolt. Therefore, the server can determine that the current positioning pressure data is the real-time effect value of the positioning side fastening bolt, and determine that the current reverse pressure data is the real-time effect value of the reverse side fastening bolt.

[0076] Of course, in one or more embodiments of the present specification, it may take several seconds to complete the switch conversion, and the data reading frequency in step S101 and step S102 is usually high. Therefore, during the switch conversion process, the server can also update the real-time positioning side tightening bolt effect value and the real-time reverse side tightening bolt effect value based on the read pressure data in real time, so that they always remain the current latest read values.

[0077] S105: Determine whether the switch is currently in a positioning locked state. If so, execute step S106; if not, execute step S107.

[0078] S106: Determine the locking surface contact force of the locking iron on the positioning side according to the difference between the current positioning pressure data and the real-time positioning side tightening bolt effect value.

[0079] S107: Determine the locking surface contact force of the locking iron on the reverse side according to the difference between the current reverse pressure data and the real-time reverse side tightening bolt effect value.

[0080] When it is determined in step S103 that the switch is in the locked state, the server may further determine whether the switch is currently in the position locked state or the reverse locked state.

[0081] When the turnout is in the positioning and locking state, the positioning pressure data read in step S102 is the superposition effect of the tightening bolt effect value and the force on the inclined surface of the locking iron on the positioning side. At this time, the server can subtract the current positioning pressure data from the real-time positioning side tightening bolt effect value based on the real-time positioning side tightening bolt effect value determined previously, and determine the locking surface contact force of the locking iron on the positioning side based on the difference.

[0082] At this time, for the locking iron on the reverse side, its locking inclined surface is still not subjected to the hook lock pressure. Therefore, in one or more embodiments of the present specification, the server can determine the current reverse pressure data as the real-time effect value of the reverse side fastening bolt, that is, the effect value of the reverse side fastening bolt is updated according to the latest pressure data, so that it always maintains real-time performance, so as to improve the accuracy of the calculation of the locking surface fitting force at the reverse side locking iron.

[0083] When the turnout is in the reverse locking state, similar to the positioning locking state, the reverse pressure data read in step S102 is the superposition effect of the tightening bolt effect value and the force on the reverse side locking iron inclined surface. At this time, the server can subtract the current reverse pressure data from the real-time reverse side tightening bolt effect value based on the real-time reverse side tightening bolt effect value determined previously, and determine the reverse side locking iron locking surface contact force based on the difference.

[0084] At this time, for the locking iron on the positioning side, its locking inclined surface is still not subjected to the hook locking pressure. Therefore, in one or more embodiments of this specification, the server can determine the current positioning pressure data as the real-time positioning side fastening bolt effect value, that is, the positioning side fastening bolt effect value is updated according to the latest pressure data, so that it always maintains real-time performance, so as to improve the accuracy of the calculation of the locking surface fitting force at the positioning side locking iron.

[0085] The difference between the pressure data (either positioning pressure data or reverse pressure data) and the real-time value of the corresponding side tightening bolt's effect is theoretically a component of the locking surface contact force. At a given turnout position, this relationship theoretically exhibits a linear relationship. In practice, at least the value calculated from the sensor pressure difference increases with increasing locking surface contact force, and decreases with decreasing contact force. Therefore, in one or more embodiments of this specification, the relationship between the locking surface contact force and this difference can be calculated based on static equilibrium theory, or a calibration method can be used to derive a functional relationship between the two, and this relationship can be used to calculate the locking surface contact force. Subsequently, the resulting friction force or friction torque can be further calculated based on friction theory, and the upper limit of the locking surface contact force can be determined based on the acceptable friction force or friction torque. Alternatively, the upper limit of the allowable locking surface contact force can be statistically determined based on the China Railway Corporation's adjustment and testing methods. This upper limit of the locking surface contact force serves as a quantitative indicator.

[0086] In addition, in one or more embodiments of the present specification, multiple tests can be conducted on the difference. According to the inspection method of the China Railway Group, the switch locking is adjusted, the difference between the pressure data and the real-time effect value of the corresponding side tightening bolt is statistically analyzed, and the upper limit of the difference is determined. This is used as a benchmark for indirect quantitative detection of the locking surface contact force.

[0087] Based on the locking surface contact force detection method for a turnout lock shown in FIG4 , the state data of the turnout in its transition or locking state is first read, and the positioning pressure data between the positioning side locking iron and the positioning side locking frame, as well as the reverse position pressure data between the reverse position locking iron and the reverse position locking frame, are read. When the turnout is determined to be in the transition state based on the state data, the pressure data on the corresponding side is used as the effect value of the tightening bolt on the corresponding side, thereby clarifying the pressure generated by the tightening bolt. When it is detected that the turnout has switched to the locked state, the accurate locking surface contact force is determined based on the difference between the current pressure data on the corresponding side and the effect value of the tightening bolt on the corresponding side, based on the positioning locking state or the reverse locking state. The present invention eliminates the influence of the pressure generated by the tightening bolt on the locking surface contact force detection, and can obtain a highly accurate locking surface contact force detection result, thereby improving the control accuracy of the close contact parameters and the locking surface contact force.

[0088] The locking surface contact force obtained in this way is equivalent to the measurement effect after the pressure sensor is reset to zero before the turnout is locked, which truly solves the influence of the effect of the tightening bolt on the measurement result. It is equivalent to resetting to zero before each measurement, and also solves the problem of zero point change caused by changes in the effect of the tightening bolt during use.

[0089] By measuring the effect of the tightening bolts during the switching process before the switch is locked, and subtracting it from the measured pressure data after locking, the effect of the tightening bolts will not change significantly during the switch switching time of several seconds, thus eliminating the influence of the tightening bolts on the measurement results. This is equivalent to performing zeroing before each measurement. Secondly, the difference between the pressure data obtained according to the present invention and the real-time numerical value of the tightening bolt effect on the corresponding side or the locking surface contact force is directly compared with the limit value determined by theoretical calculation and experimental verification. It is more unified than the detection method standard of the China Railway Group, has strong operability, and is monitored in real time. Data can be obtained after each conversion. At the same time, the monitoring data after each conversion can be statistically analyzed to derive the trend of change. In comparison, manual operation has a high probability of misjudgment and is difficult to grasp the trend of change.

[0090] When applying the locking surface contact force detection method for a turnout lock provided in this specification, the steps may not be performed in the order shown in FIG. 4 . The specific execution order of the steps may be determined as needed, and this specification does not impose any restrictions on this.

[0091] Furthermore, in one or more embodiments of this specification, to prevent the impact of extremely rare sudden changes on the accuracy of determining the effectiveness of the tightening bolts, the server may cache the effectiveness values ​​of the locating-side tightening bolts at multiple moments according to a preset data volume, calculate the average of these effectiveness values ​​at multiple moments, and use this as the real-time effectiveness value of the locating-side tightening bolts. Furthermore, the server may cache the effectiveness values ​​of the counter-positioning-side tightening bolts at multiple moments according to a preset data volume, calculate the average of these effectiveness values ​​at multiple moments, and use this as the real-time effectiveness value of the counter-positioning-side tightening bolts. By determining the effectiveness of the tightening bolts based on the average value, the accuracy of determining the effectiveness of the tightening bolts is improved, thereby improving the accuracy of calculating the contact force of the turnout locking surface.

[0092] Furthermore, in one or more embodiments of this specification, due to the complex environment, harsh working conditions, and poor stability of the turnout, its fastening bolts may pose hidden dangers under harsh working conditions. Therefore, after determining the effect value of the positioning side fastening bolt, the server can determine whether the real-time effect value of the positioning side fastening bolt is less than a preset tightening threshold. If so, it indicates that the positioning side fastening bolt may be faulty, and an alarm can be issued for the positioning side fastening bolt. Similarly, after determining the effect value of the reverse side fastening bolt, the server can determine whether the real-time effect value of the reverse side fastening bolt is less than a preset tightening threshold. If so, an alarm can be issued for the reverse side fastening bolt. This avoids the impact of fastening bolt failure on train operation and improves driving safety.

[0093] Furthermore, in one or more embodiments of the present specification, due to the complex environment, harsh working conditions, and poor stability of the turnout, its fastening bolts may pose a hidden danger under harsh working conditions. Therefore, the server can first cache the effect values ​​of the positioning side fastening bolts and / or the effect values ​​of the reverse side fastening bolts at multiple moments according to a preset data volume, and analyze the change trend of the effect values ​​of the positioning side fastening bolts and / or the effect values ​​of the reverse side fastening bolts. The analysis here can be to use any currently mature neural network model to extract one or more combinations of time domain features, frequency domain features, time-frequency features, periodic features, etc. of the effect values ​​of the positioning side fastening bolts and / or the effect values ​​of the reverse side fastening bolts at multiple moments. The specific feature to be used to characterize the change trend can be determined as needed, and this specification does not impose any restrictions on this.

[0094] The server can then determine whether the positioning-side fastening bolt is abnormal based on the difference between the preset standard change trend and the change trend of the positioning-side fastening bolt's effect value. If so, an alarm is issued for the positioning-side fastening bolt. Furthermore, the server can determine whether the reverse-side fastening bolt is abnormal based on the difference between the preset standard change trend and the change trend of the reverse-side fastening bolt's effect value. If so, an alarm is issued for the reverse-side fastening bolt. This prevents the impact of fastening bolt failures on train operations and improves driving safety.

[0095] In addition, in one or more embodiments of the present specification, it is assumed that the switch locking mechanism is an elastic system, and the transfer function of the pressure of the locking iron on the locking frame and the switch adhesion force conforms to a linear relationship. The pressure sensor value corresponding to the time when the point rail and the base rail (heart rail and wing rail) are close to each other at a very small distance but do not squeeze each other (such as the gap is greater than 0.1mm and less than 1mm) is measured. Under the specified adhesion conditions, the squeezing pressure between the point rail and the base rail (heart rail and wing rail) is measured (such as inserting a pressure sensor between the two), and the transfer function of the pressure of the locking iron on the locking frame and the switch adhesion force can be calculated according to the linear relationship. Thereafter, the switch adhesion force value can be calculated by measuring the pressure of the locking iron on the locking frame according to this transfer function, and the switch adhesion force can be detected at the same time.

[0096] In addition, in one or more embodiments of the present specification, when the positioning side pressure sensor and the reverse side pressure sensor are dynamic sensors (the charge will be neutralized when the load does not change for a long time, and the long-term effective output of the stable load cannot be maintained), the measurement and calculation results should be technically processed when the turnout does not change in state for a long time.

[0097] The above is a method for detecting the contact force of the locking surface of a turnout lock provided in one or more embodiments of this specification. Based on the same idea, this specification also provides a corresponding device for detecting the contact force of the locking surface of a turnout lock, as shown in FIG6 .

[0098] FIG6 is a schematic diagram of a locking surface contact force detection device for a turnout lock provided in this specification, comprising:

[0099] The state sensor 201 is provided in the switch machine and is used to detect whether the switch is in the switching or locking state;

[0100] Positioning pressure sensor 202, arranged between the positioning locking iron and the locking frame;

[0101] The reverse position pressure sensor 203 is provided between the reverse position locking iron and the locking frame;

[0102] a state reading module 204, electrically connected to the state sensor, the positioning pressure sensor, and the reverse pressure sensor, for reading state data from the state sensor, reading positioning pressure data from the positioning pressure sensor, and reading reverse pressure data from the reverse pressure sensor;

[0103] The judgment and calculation module 205 is used to judge whether the switch is currently in a switching state based on the status data. If so, the current positioning pressure data is determined to be the real-time positioning side fastening bolt effect value, and the current reverse position pressure data is determined to be the real-time reverse position fastening bolt effect value; if not, when the switch is in the positioning locked state, the locking surface contact force of the positioning side locking iron is determined based on the difference between the current positioning pressure data and the real-time positioning side fastening bolt effect value; or when the switch is in the reverse position locked state, the locking surface contact force of the reverse position locking iron is determined based on the difference between the current reverse position pressure data and the real-time reverse position fastening bolt effect value.

[0104] The specific definitions of the device for detecting the contact force of the locking surface of a turnout lock can be found in the definitions of the method for detecting the contact force of the locking surface of a turnout lock described above and will not be repeated here. Each module in the aforementioned device for detecting the contact force of the locking surface of a turnout lock can be implemented in whole or in part via software, hardware, or a combination thereof. Each of these modules can be embedded in or independent of a processor in a computer device in hardware form, or stored in a computer device memory in software form, allowing the processor to call and execute the corresponding operations of each module.

[0105] This specification also provides a computer-readable storage medium, which stores a computer program. The computer program can be used to execute the locking surface contact force detection method of the switch lock provided in Figure 4 above.

[0106] This specification also provides a schematic diagram of the computer device shown in Figure 7. As shown in Figure 7, at the hardware level, the computer device includes a processor, an internal bus, a network interface, memory, and non-volatile storage, and may also include other hardware required for operations. The processor reads the corresponding computer program from the non-volatile storage, transfers it to the internal memory, and then executes it to implement the locking surface contact force detection method for a turnout lock as described in Figure 4.

[0107] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory or optical memory, etc. Volatile memory may include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0108] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A method for detecting the contact force of a locking surface of a turnout lock, wherein in the turnout locking structure, a locking frame is installed on one side of a base rail / wing rail by fastening bolts, a locking iron is installed outside the locking frame, a locking hook is connected to a point rail / heart rail, and the point rail / heart rail is located on the other side of the base rail / wing rail; the locking hook is driven to move by the movement of a locking rod until the point rail / heart rail connected to the locking hook is in close contact with the base rail / wing rail, and pressure is applied to the inclined surface of the locking iron by the locking hook to keep the base rail / wing rail in close contact with the point rail / heart rail; the contact surface between the locking hook and the inclined surface of the locking iron is the locking surface; the locking state of the turnout includes a positioning locking state and a reverse locking state according to the relative positions of the base rail / wing rail and the point rail / heart rail; and it is characterized in that, The method comprises: Read the status data reflecting whether the turnout is in the switching or locking state; Read the positioning pressure data between the locking iron on the positioning side and the locking frame on the positioning side, and read the reverse pressure data between the locking iron on the reverse side and the locking frame on the reverse side; Determine whether the turnout is currently in a switching state according to the state data; If so, determine the current positioning pressure data as the real-time positioning side tightening bolt effect value, and determine the current reverse position pressure data as the real-time reverse position side tightening bolt effect value; If not, when the turnout is in the positioning locked state, the locking surface contact force at the positioning side locking iron is determined according to the difference between the current positioning pressure data and the real-time positioning side tightening bolt effect value; or when the turnout is in the reverse locking state, the locking surface contact force at the reverse side locking iron is determined according to the difference between the current reverse pressure data and the real-time reverse side tightening bolt effect value.

2. The method for detecting the locking surface contact force of a turnout lock according to claim 1, characterized in that: The method further comprises: When the turnout is in the position locking state, the current reverse pressure data is determined as the real-time reverse side tightening bolt effect value; and when the turnout is in the reverse locking state, the locking surface contact force of the reverse side locking iron is determined according to the difference between the current reverse pressure data and the real-time reverse side tightening bolt effect value; When the turnout is in the reverse locked state, the current positioning pressure data is determined as the real-time positioning side fastening bolt effect value, and when the turnout is in the positioning locked state, the locking surface contact force of the positioning side locking iron is determined according to the difference between the current positioning pressure data and the real-time positioning side fastening bolt effect value.

3. The method for detecting the locking surface contact force of a turnout lock according to claim 1 or 2, characterized in that: The method further comprises: Cache the positioning side tightening bolt effect values ​​at multiple moments according to the preset data volume, calculate the average value of the positioning side tightening bolt effect values ​​at multiple moments as the real-time positioning side tightening bolt effect value; and / or, The effect values ​​of the counter-side tightening bolts at multiple moments are cached according to a preset data amount, and the average value of the effect values ​​of the counter-side tightening bolts at multiple moments is calculated as the real-time effect value of the counter-side tightening bolts.

4. The method for detecting the locking surface contact force of a turnout lock according to claim 1, characterized in that: The method further comprises: Determine whether the real-time positioning side tightening bolt effect value is less than a preset tightening threshold; if so, issue an alarm for the positioning side tightening bolt; It is determined whether the real-time effect value of the tightening bolt on the reverse side is less than the preset tightening threshold; if so, an alarm is issued for the tightening bolt on the reverse side.

5. The method for detecting the locking surface contact force of a turnout lock according to claim 1, characterized in that: The method further comprises: caching the effect values ​​of the positioning side fastening bolts and / or the effect values ​​of the counter-position side fastening bolts at multiple moments according to a preset data volume, and analyzing the change trend of the effect values ​​of the positioning side fastening bolts and / or the effect values ​​of the counter-position side fastening bolts; Based on the difference between the preset standard change trend and the change trend of the effect value of the positioning side tightening bolt, determine whether the positioning side tightening bolt is abnormal. If so, an alarm is issued for the positioning side tightening bolt; and / or based on the difference between the preset standard change trend and the change trend of the effect value of the reverse side tightening bolt, determine whether the reverse side tightening bolt is abnormal. If so, an alarm is issued for the reverse side tightening bolt.

6. The method for detecting the locking surface contact force of a turnout lock according to claim 1, characterized in that: The state sensor preset in the switch machine detects whether the switch is in the switching or locking state; The positioning pressure data between the positioning side locking iron and the positioning side locking frame is obtained by a positioning side pressure sensor preset between the positioning side locking iron and the positioning side locking frame; The reverse position pressure data between the reverse position side locking iron and the reverse position side locking frame is obtained through the reverse position side pressure sensor preset between the reverse position side locking iron and the reverse position side locking frame.

7. A locking surface contact force detection device for a turnout lock, characterized in that: include: A state sensor is arranged in the switch machine and is used to detect whether the switch is in a switching or locking state; A positioning pressure sensor is arranged between the positioning locking iron and the locking frame; A reverse position pressure sensor is arranged between the reverse position locking iron and the locking frame; A state reading module, used for reading state data from the state sensor, reading positioning pressure data from the positioning pressure sensor, and reading reverse position pressure data from the reverse position pressure sensor; The judgment and calculation module is used to judge whether the turnout is currently in a switching state based on the state data. If so, the current positioning pressure data is determined to be the real-time positioning side fastening bolt effect value, and the current reverse position pressure data is determined to be the real-time reverse position side fastening bolt effect value; if not, when the turnout is in a positioning locked state, the locking surface contact force at the locking iron on the positioning side is determined based on the difference between the current positioning pressure data and the real-time positioning side fastening bolt effect value; or when the turnout is in a reverse position locked state, the locking surface contact force at the locking iron on the reverse position is determined based on the difference between the current reverse position pressure data and the real-time reverse position side fastening bolt effect value.

8. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

9. A computer device, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method described in any one of claims 1 to 6 is implemented.

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