Method, device and equipment for detecting attaching force of locking surface of turnout locking

Abstract

The invention discloses a method, a device and equipment for detecting the attaching force of a locking surface of turnout locking, and relates to the technical field of turnout locking detection. The state data of the switching or locking state of the turnout is firstly read, the pressure data of the pressure sensor preset between the locking iron and the locking frame is read, when the turnout is currently in the switching state, the pressure data of the corresponding side can serve as the action effect value of the fastening bolt on the corresponding side, and therefore the action effect value of the fastening bolt is determined. When the turnout is switched to the locking state, the accurate locking surface attaching force can be determined based on positioning locking or reverse locking according to the difference value between the current pressure data of the corresponding side and the acting effect value of the fastening bolt on the corresponding side. According to the invention, the influence of the pressure generated by the fastening bolt on the locking surface fitting force detection is eliminated, and a high-precision locking surface fitting force detection result can be obtained, so that the close fitting parameter and the control precision of the locking surface fitting force are improved.

Description

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 turnout point rail (heart rail) and the base rail (wing rail) meet the close fit requirements and are reliably locked to meet the basic conditions for vehicle passage. The locking forms of the movable part of the turnout can currently be divided into two types: internal locking and external locking. The internal locking is a turnout locking method that uses a connecting rod and a locking mechanism in the switch machine to fix the movable part of the turnout in a set position. The external locking is a turnout locking method that uses a mechanical structure based on the fixed part of the turnout to lock the movable part of the turnout with the fixed part.

[0003] In the early locking structure, the degree of close contact between the movable part and the fixed part of the turnout is described by the close contact force. The close contact force is defined in the railway industry standard TB / T2895-1997 "Close contact force of turnout conversion resistance". The close contact force is the pressure applied by the movable part to the basic rail (wing rail) at the center of the turnout traction point after the movable part of the turnout is converted to close contact with the basic rail (wing rail). For the internal locking turnout, the expected value of the close contact force is 1000N±500N, and for the external locking turnout, the expected value of the close contact force is zero.

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

[0005] For external locking turnouts, the external locking device locks the movable part of the turnout, and the turnout rebound force and the sealing 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 close contact force is generated by the locking mechanism (switch machine or external locking) and maintained by the contact force of the locking surface of the locking mechanism. This is true for both the internally locked and externally locked turnout locking forms. When there is a rebound force in the turnout, the locking mechanism overcomes the rebound force and generates a close contact force between the point rail and the base rail or the heart rail and the wing rail. When the rebound force and the close contact force are relatively large, a relatively large contact force is generated between the locking surfaces of the locking mechanism, and a large friction force is generated between the locking surfaces of the locking mechanism. When the driving force is not enough to overcome this friction force, the locking mechanism cannot be locked or unlocked, which will eventually lead to a turnout conversion failure and affect the operation of the vehicle. 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 or 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 fitting force is zero while ensuring the close fitting parameters, or due to other factors, when the close fitting 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, while controlling various close fitting parameters, 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 for whether the adjustment of the external locking turnout is appropriate: 1. The gap between the tip of the point rail and the heart rail to the first traction point should not be greater than 0.5mm, and the remaining close-fitting sections should not be greater than 1.0mm. 2. The lock hook and locking rod should be able to swing left and right appropriately, ..., or use a tool with a length of 350mm-450mm to pry the inner side of the tip of the point rail (heart rail) close to the outside, and the close-fitting gap has an increase of 0.5mm-1.0mm. After loosening, the point rail (heart rail) can automatically rebound.

[0009] It can be seen that the requirement for turnout 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 finally ensure that the pressure between the locking-related fitting surfaces is not very large. Or check the degree of separability between the point rail and the base rail, and finally ensure the fitting pressure between the lock hook and the locking iron locking surface. That is, whether it is an internal locking turnout or an external locking turnout, it is necessary to ensure the close fitting 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 easy to operate manually on site and is simple and convenient.

[0010] However, the manual inspection method has no specific parameters, is highly dependent on personal feelings, and has inconsistent standards during implementation. In addition, the turnout is located in a complex environment, has harsh working conditions, and has poor stability. The possibility and frequency of changes in the locking surface adhesion of the external lock are high. If it changes too much between two inspections and adjustments, it may cause a turnout switching failure. If its changes can be continuously monitored, its changing trend can be grasped in time, and adjustments can be made before a failure occurs, ultimately reducing the impact on vehicle operation.

[0011] The prior art proposes a method for detecting the close fit of railway turnouts, 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 close fit of the turnout and provide a quantitative basis for on-site close fit adjustment and maintenance.

[0012] However, the force at the position measured by the current railway turnout close-fitting force detection method is mainly generated by the close-fitting force of the turnout and the rebound force, and the pressure generated by the fastening bolts cannot be eliminated. That is, the current railway turnout close-fitting force detection method cannot accurately reflect the close-fitting force of the turnout, and cannot be used as a basis for controlling the close-fitting parameters and the locking surface contact 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 locking surface contact force of the external lock are high. If the change trend cannot be determined in time, it may cause turnout conversion failures and have an adverse effect on vehicle operation. Therefore, in practical applications, controlling the locking surface contact force is more conducive to the normal operation of the turnout than controlling the close-fitting force of the turnout, and the close-fitting parameters can be guaranteed by controlling the locking surface contact force. At present, there is still a lack of methods for directly detecting the contact force of the turnout locking surface. 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 solve the above-mentioned technical problems.

[0014] This manual adopts the following technical solutions:

[0015] The present specification provides a method for detecting the contact force of the locking surface of a turnout lock, in which 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; 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 according to the state data;

[0019] 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;

[0020] 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.

[0021] Optionally, the method further comprises:

[0022] 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;

[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 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.

[0024] Optionally, the method further comprises:

[0025] 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,

[0026] 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.

[0027] Optionally, the method further comprises:

[0028] 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;

[0029] 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.

[0030] Optionally, the method further comprises:

[0031] 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;

[0032] 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.

[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 side locking iron and the reverse position side locking frame is obtained by a reverse position side pressure sensor preset between the reverse position side locking iron and the reverse position side locking frame.

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

[0035] A state sensor is arranged in the switch machine and is used to detect whether the switch is in a switching or locking state;

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

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

[0038] 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;

[0039] 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.

[0040] This specification provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the locking surface contact force detection method of the switch lock is implemented.

[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, wherein the processor implements the above-mentioned method for detecting the locking surface contact force of the turnout lock when executing the program.

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

[0043] First, read the state 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 and the reverse position pressure data between the reverse position side locking iron and the reverse position side locking frame. When it is judged that the switch is currently in the conversion state according to the state data, the pressure data of the corresponding side is used as the effect value of the fastening bolt on the corresponding side, so as to clarify 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 of 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 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] Figure 1 A schematic diagram of a lock hook and locking rod inspection provided for this manual;

[0046] Figure 2 A schematic diagram for inspecting the inner side of the waist of a pointed rail provided in this specification;

[0047] Figure 3 A schematic diagram of rebound force, close fit force and locking surface fit force provided in this manual;

[0048] Figure 4 A schematic diagram of a method for detecting the locking surface contact force of a turnout lock provided in this specification;

[0049] Figure 5 A schematic diagram of a sensor setting and locking mechanism provided in this manual;

[0050] Figure 6 A schematic diagram of a locking surface contact force detection device for a turnout lock provided in this specification;

[0051] Figure 7A schematic diagram of a computer device for realizing a locking surface contact force detection method for turnout locking provided in this specification. DETAILED DESCRIPTION

[0052] In order 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 combination with the specific embodiments of this specification and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in the specification, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

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

[0054] For checking whether the adjustment of the external locking turnout is appropriate, refer to Figure 1 or Figure 2 , Figure 1 This is a schematic diagram of a lock hook and a locking rod inspection in this manual. Figure 1 The locking hook and locking rod in the middle should be able to swing moderately left and right. Figure 2 This is a schematic diagram of the inspection of the inner side of the waist of a pointed rail tip in this specification. Figure 2 When using a tool with a length of 350mm-450mm to pry out the inner side of the waist of the tip of the point rail, the gap should increase by 0.5mm-1.0mm. After loosening, the point rail should be able to bounce back automatically.

[0055] At present, Tonghao Design Institute has disclosed a railway turnout close-fitting force detection method and system, and installed a special force sensor at the locking iron adjustment plate (between the locking iron and the locking frame) to reflect the close-fitting force of the turnout, and provide a quantitative basis for on-site close-fitting adjustment and maintenance and repair. However, this method cannot directly reflect the close-fitting force of the turnout. First, the force at the measured position is mainly generated by the close-fitting force of the turnout and the 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 close-fitting force and the pressure at the measured position needs to correspond to the turnout one by one, and the transfer function needs to be corrected regularly. Secondly, the pressure generated by the tightening bolt 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 close-fitting force 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 close-fitting force of the turnout using the pressure at the measured position.

[0056] In order to ensure the normal operation of the turnout, it is necessary not only to ensure the close contact of the turnout, but also to control the friction of the locking parts' fitting surfaces. The close contact of the turnout can be controlled by mechanical clearance inspection. The friction of the locking parts' fitting surfaces is proportional to the pressure between the locking parts' fitting surfaces. Since the static friction after locking and the dynamic friction during the locking and unlocking process are not convenient to measure, and cannot be measured continuously online, it is necessary to measure the pressure between the locking parts' fitting surfaces to reflect the friction, and then control the pressure between the locking parts' fitting surfaces to control the friction between their fitting surfaces.

[0057] However, the force at the position measured by the current railway turnout adhesion detection method is mainly generated by the turnout adhesion and rebound force, and the rebound force of the same set 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 by 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 turnout adhesion.

[0058] Figure 3 Schematic diagram of rebound force, adhesion force and locking surface adhesion force in this manual, as shown in Figure 3 As shown, F1 represents the close contact force acting on the point rail, F2 represents the rebound force of the point 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. If a pressure sensor is set between the locking iron and the locking frame, pressure data with a proportional relationship with F3 can be measured. By mastering this proportional relationship, the value of F3 can be known, or the value of F3 can be controlled directly according to the value measured by the pressure sensor based on experience and experimental data.

[0059] In addition, if the rebound force F2 is measured, the close contact force F1 can be calculated. If the transmission coefficient of the close contact force F1 at the pressure sensor is measured, that is, the numerical relationship of a certain value of the close contact force F1 measured at the pressure sensor is obtained, the resultant force of the rebound force F2 and the close contact force F1 can be obtained based on the data measured by the pressure sensor.

[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, but 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, and further, there is a relatively fixed and clear relationship between the measured value and the friction between the mating surfaces of the locking parts. Finally, 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 technical solutions provided by various embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0062] Figure 4 This is a flow chart of a method for detecting the locking surface contact force 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: Read the positioning pressure data between the positioning side locking iron and the positioning side locking frame, and read the reverse position pressure data between the reverse position side locking iron and the reverse position side locking frame.

[0065] Generally, in the turnout locking structure, the locking frame is installed on one side of the base rail / wing rail by fastening bolts, the locking iron is installed outside the locking frame, the locking hook is connected to the 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 the locking rod until the point rail / heart rail connected to the locking hook is in close contact with the base rail / wing rail, and the locking hook applies pressure to the inclined surface of the locking iron to keep the base rail / wing rail and the point rail / heart rail in close contact. Among them, the contact surface between the locking hook and the inclined surface of the locking iron is the locking surface, and 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.

[0066] Based on this, when detecting the switching or locking state of the turnout, a state 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 the present specification, a sensor may be pre-installed in the switch machine to detect whether the turnout is in a switching state or a locked state, so as to perform different processing according to different states. Of course, sensors may also be installed on the relevant parts of the external locking device to monitor the parameters of the parts that can distinguish the switch switching and locking states. For example, a displacement sensor may be installed on the switch machine action rod to monitor the displacement of the switch machine action rod to determine whether the turnout is in a switching state or a locked state. An ammeter may be installed on the motor to monitor the motor working current to determine the start time of the switch machine. After a fixed delay time, the turnout is unlocked and starts to switch. A displacement sensor may also be installed on the locking rod of the external locking device to monitor the displacement of the locking rod of the external locking device, and determine whether the turnout is in a switching state or a locked state according to its displacement data. A displacement sensor may also be installed on the indicating rod to monitor the movement of the indicating rod. The movement of the indicating rod indicates that the turnout is unlocked, etc. The specific method to be adopted can be determined according to needs, and this specification does not limit this.

[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 on the locking iron inclined surface and the force of the fastening bolt on the sensor when the turnout is locked. Figure 5 shown.

[0069] Figure 5 This is a schematic diagram of a sensor setting and locking mechanism in this specification. It is assumed that the left side locking corresponds to the positioning locking, and correspondingly, the right side locking is the reverse locking. Figure 5 visible, Figure 5 The figure shows a locking rod 1, a positioning side pressure sensor 2, a reverse side pressure sensor 3, a locking hook 4, a locking iron 5 and a locking frame 6. Among them, the left locking hook is a positioning side locking hook, the right locking hook is a reverse side locking hook, the left locking iron is a positioning side locking iron, the left locking frame is a positioning side locking frame, the right locking iron is a reverse side locking iron, and the right locking frame is a reverse side locking frame.

[0070] A positioning side pressure sensor is pre-set between the positioning locking iron and the positioning locking frame, and the positioning pressure data between the positioning side locking iron and the positioning side locking frame is obtained through the positioning side pressure sensor preset between the positioning side locking iron and the positioning side locking frame; and a reverse side pressure sensor is pre-set between the reverse side locking iron and the reverse side locking frame, and the reverse side pressure data between the reverse side locking iron and the reverse side locking frame is obtained through the reverse side pressure sensor preset between the reverse side locking iron and the reverse side locking frame. After that, the server of the business platform can read the required data in real time to detect 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 a business platform, or a device such as a desktop, a laptop, a single-chip microcomputer, an MCU, etc. that can execute the solution of this specification. For the convenience of explanation, the following description is based on the server as the execution subject.

[0073] S103: Determine whether the turnout is currently in a switching state according to the state data, if so, execute step S104, if not, execute step S105.

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

[0075] After reading the status data representing the state of the turnout, the server can determine the current state of the turnout based on the status data. When the turnout is in the switching state, the locking slope 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 turnout conversion, and the data reading frequency in step S101 and step S102 is usually high. Therefore, during the turnout 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 according to the read pressure data in real time, so that they always remain the latest read values.

[0077] S105: Determine whether the turnout 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 at 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 at the reverse side according to the difference between the current reverse side pressure data and the real-time reverse side tightening bolt effect value.

[0080] When it is determined in step S103 that the turnout is in a locked state, the server may further determine whether the turnout is currently in a positioned locked state or a 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 to keep it in real time at all times, 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 locking surface contact force of the reverse side locking iron based on the difference.

[0084] At this time, for the locking iron on the positioning side, its locking slope is still not subjected to the hook locking pressure. Therefore, in one or more embodiments of the present 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 to keep it in real time at all times, 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 (positioning pressure data or reverse pressure data) and the real-time corresponding side tightening bolt effect value is theoretically the component force of the locking surface contact force. At a certain turnout position, it theoretically has a linear relationship. In practice, at least the value calculated by the sensor pressure difference increases with the increase of the locking surface contact force and decreases with the decrease. Therefore, in one or more embodiments of this specification, the locking surface contact force and the difference relationship can be calculated according to the static balance theory, or the calibration method can be used to obtain the functional relationship between the two, and the locking surface contact force can be calculated using this relationship. Subsequently, the friction force or friction torque generated can be further calculated according to the friction theory, and the upper limit value of the locking surface contact force can be determined according to the acceptable friction force or friction torque, or according to the adjustment and detection method of the National Railway Group, the upper limit value of the allowable locking surface contact force can be statistically calculated. This upper limit value of the locking surface contact force is 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 National Railway Group, the turnout lock is adjusted, the difference between the pressure data and the real-time effect value of the corresponding side tightening bolt is statistically analyzed, the upper limit of the difference is determined, and this is used as a benchmark for indirect quantitative detection of the locking surface fitting force.

[0087] based on Figure 4 The locking surface contact force detection method of the turnout lock shown first reads the state data of the conversion or locking state of the turnout, and reads the positioning pressure data between the positioning side locking iron and the positioning side locking frame and the reverse position pressure data between the reverse position side locking iron and the reverse position side locking frame. When it is judged that the turnout is currently in the conversion state according to the state data, the pressure data of the corresponding side is used as the effect value of the tightening bolt on the corresponding side, so as to clarify the pressure generated by the tightening bolt. When it is detected that the turnout 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 of the corresponding side and the effect value of the tightening bolt on the corresponding side. 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 high-precision locking surface contact force detection result to improve the control accuracy of the close contact parameters and the locking surface contact force.

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

[0089] By measuring the effect of the fastening bolts during the conversion process before the turnout is locked, and subtracting it from the measured pressure data after locking, the effect of the fastening bolts will not change significantly during the turnout conversion time of several seconds, so that the influence of the effect of the fastening bolts on the measurement results can be eliminated. It is equivalent to zeroing before each measurement. Secondly, the difference between the pressure data obtained according to the present invention and the real-time corresponding side fastening bolt effect value or the locking surface fitting force is directly compared with the limit value determined by theoretical calculation and experimental verification, which is more unified than the detection method standard of the National Railway Group, has strong operability, real-time monitoring, and data can be obtained after each conversion is completed. At the same time, the monitoring data after each conversion can be statistically analyzed to derive the trend of change. In contrast, the probability of misjudgment in manual operation is large, and it is difficult to grasp the trend of change.

[0090] When using the locking surface contact force detection method for turnout locks provided in this manual, it is not necessary to Figure 4 The steps are executed in the order shown. The specific execution order of the steps can be determined according to needs, and this manual does not limit this.

[0091] In addition, in one or more embodiments of the present specification, in order to avoid the influence of extremely individual mutation values ​​on the accuracy when determining the effect of the tightening bolt, the server can also cache the effect values ​​of the positioning side tightening bolt at multiple moments according to the preset data volume, calculate the average value of the effect values ​​of the positioning side tightening bolt at multiple moments, and use it as the real-time effect value of the positioning side tightening bolt. And / or, cache the effect values ​​of the reverse side tightening bolt at multiple moments according to the preset data volume, calculate the average value of the effect values ​​of the reverse side tightening bolt at multiple moments, and use it as the real-time effect value of the reverse side tightening bolt. By determining the effect of the tightening bolt with the average value, the accuracy of determining the effect of the tightening bolt is improved, thereby improving the accuracy of calculating the contact force of the turnout locking surface.

[0092] 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 present hidden dangers under harsh working conditions. Therefore, after determining the effect value of the fastening bolts on the positioning side, the server can determine whether the real-time effect value of the fastening bolts on the positioning side is less than the preset fastening threshold. If so, it indicates that the fastening bolts on the positioning side may be faulty, and an alarm may be issued for the fastening bolts on the positioning side. Similarly, after determining the effect value of the fastening bolts on the reverse side, the server can determine whether the real-time effect value of the fastening bolts on the reverse side is less than the preset fastening threshold. If so, an alarm may be issued for the fastening bolts on the reverse side. This avoids the impact of the fastening bolt failure on the 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 hidden dangers under harsh working conditions. Therefore, the server may 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 the 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 mature neural network model at present 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 characteristics used to characterize the change trend can be determined according to needs, and this specification does not limit this.

[0094] Afterwards, the server can judge whether the fastening bolt on the positioning side is abnormal according to the difference between the preset standard change trend and the change trend of the effect value of the fastening bolt on the positioning side, and if so, issue an alarm for the fastening bolt on the positioning side. And / or judge whether the fastening bolt on the reverse side is abnormal according to the difference between the preset standard change trend and the change trend of the effect value of the fastening bolt on the reverse side, and if so, issue an alarm for the fastening bolt on the reverse side. This avoids the impact of the fastening bolt failure on the train operation 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, then the transfer function of the pressure of the locking iron on the locking frame and the switch adhesion force conforms to a linear relationship, and the pressure sensor value corresponding to the time when the point rail and the basic rail (heart rail and wing rail) are close to each other at a very small distance but not squeezed against each other (such as a gap greater than 0.1mm and less than 1mm) is measured. Under specified adhesion conditions, the squeezing pressure between the point rail and the basic 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. Afterwards, 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), technical processing should be performed on the measurement and calculation results when the turnout does not change in state for a long time.

[0097] The above is a method for detecting the closing surface contact force of a turnout lock provided by one or more embodiments of this specification. Based on the same idea, this specification also provides a corresponding device for detecting the closing surface contact force of a turnout lock, such as Figure 6 shown.

[0098] Figure 6 A schematic diagram of a locking surface contact force detection device for a turnout lock provided in this specification includes:

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

[0100] The positioning pressure sensor 202 is arranged between the positioning locking iron and the locking frame;

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

[0102] A state reading module 204 is electrically connected to the state sensor, the positioning pressure sensor and the reverse pressure sensor, and is used to read state data from the state sensor, read positioning pressure data from the positioning pressure sensor, and read reverse pressure data from the reverse pressure sensor;

[0103] The judgment and calculation module 205 is used to judge whether the turnout is currently in a switching state based on 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 a positioning locked state, determine the locking surface contact force at the locking iron on the positioning side based on the difference between the current positioning pressure data and the real-time positioning side tightening bolt effect value; or when the turnout is in a reverse position locked state, determine the locking surface contact force at the locking iron on the reverse position side based on the difference between the current reverse position pressure data and the real-time reverse position side tightening bolt effect value.

[0104] The specific definition of the locking surface contact force detection device for the turnout lock can be found in the definition of the locking surface contact force detection method for the turnout lock mentioned above, which will not be repeated here. Each module in the above-mentioned locking surface contact force detection device for the turnout lock can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0105] This specification also provides a computer-readable storage medium, which stores a computer program, which can be used to execute the above Figure 4 A method for detecting the locking surface contact force of a turnout lock is provided.

[0106] This manual also provides Figure 7 The structural diagram of the computer device shown in FIG. Figure 7As shown in the figure, at the hardware level, the computer device includes a processor, an internal bus, a network interface, a memory, and a non-volatile memory, and may also include other hardware required for the business. The processor reads the corresponding computer program from the non-volatile memory into the memory and then runs it to achieve the above Figure 4 A method for detecting the locking surface contact force of a turnout lock is provided.

[0107] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed 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 can 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 may 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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