Anti-slip iron shoe

Abstract

The anti-slip iron shoe comprises a bottom plate and a pedal arranged on the bottom plate, one side of the bottom plate and one side of the pedal are suitable for making contact with wheels of a locomotive, a base is arranged on the plate face of one side of the bottom plate, a metal sensor is arranged on the base in a penetrating mode, and the metal sensor and the base are relatively fixed; the bottom plate is provided with a through hole, and the detection end of the metal sensor is located in the through hole. Compared with the prior art in which the metal sensor needs to be integrally packaged and the periphery of the metal sensor is further sleeved with a corresponding waterproof shell, the detection end part of the metal sensor in the embodiment of the invention is exposed below the base, so that the diameter of the metal sensor can be increased, the magnetic field intensity of the metal sensor is effectively improved, and the sensing distance is increased; the device can reliably detect the existence of a rail at a longer distance, and solves the problem that the detection distance is insufficient due to the too small size of the sensor, and the vehicle sliding is misreported.

Description

Technical Field

[0001] The present invention relates to the technical field of railway anti-rolling devices, and in particular to an anti-rolling rail brake shoe. Background Art

[0002] When a train carriage stops in the depot, there is a risk of rolling downwards, or the carriage may also roll in other situations such as in the station. Therefore, it is necessary to set a rail brake shoe between the wheel and the rail to prevent the train from rolling. Currently, an anti-rolling rail brake shoe is usually set between the wheel and the rail. The anti-rolling rail brake shoe includes a bottom plate and a pedal. After the tread of the wheel touches the rail brake shoe, the bottom plate is pressed and the pedal is used to clamp the wheel, thereby playing a braking role.

[0003] In order to detect whether rolling occurs, those skilled in the art arrange a metal sensor in the anti-rolling rail brake shoe for detection, such as Patent CN204452481U or Patent CN119389269A, etc. A hole is opened on the bottom plate of the anti-rolling rail brake shoe to pass through the detection end of the metal sensor. However, in the actual situation of arranging the anti-rolling rail brake shoe, after the wheel of the train is normally clamped by the anti-rolling rail brake shoe, the end of the bottom plate is more stressed, which may cause the entire anti-rolling rail brake shoe to tilt slightly; at this time, the distance between the metal sensor passing through the bottom plate and the rail increases and the rail cannot be detected. After the result is sent to the control center, it will cause people to mistakenly think that rolling occurs here. The foregoing problem is due to the small volume of the metal sensor itself, which limits its detection performance. If the performance of the metal sensor is to be improved, a metal sensor with a larger diameter and a longer length needs to be set, so as to overcome the problem that the metal sensor cannot detect a farther distance.

[0004] However, if the diameter of the metal sensor is directly increased, a larger through hole needs to be constructed at the position where the metal sensor passes through the bottom plate to adapt to the diameter. If so, the stress structure of the bottom plate will be changed, that is, opening an overly large hole will reduce the structural strength of the bottom plate and cannot meet the load requirements of the locomotive rolling onto it. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an anti-rolling rail brake shoe that can increase the induction distance on the premise of ensuring the waterproof effect of the sensor part.

[0006] The purpose of the present invention is achieved by the following technical solutions: An anti-rolling steel shoe includes a bottom plate and a pedal provided on the bottom plate. One side of the bottom plate and one side of the pedal are adapted to contact with the wheels of a locomotive. It further includes a base and a sensor protective cover. The base is provided on the surface of one side plate of the bottom plate where the pedal is arranged. A metal sensor is passed through the base, and the metal sensor is relatively fixed to the base. A seal is formed at the fixing position of the metal sensor and the base, and a seal is formed at the connection between the base and the bottom plate; a through hole is opened on the bottom plate, and the detection end of the metal sensor is located in the through hole; the opening of the sensor protective cover is adapted to cooperate with one side of the base away from the pedal to form a sealed cavity, and the part of the metal sensor located on the side of the base away from the bottom plate is completely covered in the sensor protective cover.

[0007] The beneficial effects of the present invention are as follows: Compared with the prior art where the whole metal sensor needs to be encapsulated, resulting in a corresponding waterproof shell being sleeved outside the metal sensor, in the embodiment of the present application, the detection end part of the metal sensor is exposed under the base, so there is no need to reserve space for the waterproof shell in the through hole. Thus, when the diameter of the through hole on the bottom plate remains unchanged, the diameter of the metal sensor can be set larger. In this way, by increasing the diameter of the metal sensor, its magnetic field intensity can be effectively increased, thereby increasing the induction distance, enabling it to reliably detect the presence of the rail at a farther distance, and overcoming the problem of false alarms of vehicle rolling due to insufficient detection distance caused by the too small volume of the original sensor.

[0008] Furthermore, it further includes a sensor protective cover, and the opening of the sensor protective cover is adapted to cooperate with the base; wherein, the part of the metal sensor located on the side of the base away from the bottom plate is completely covered in the sensor protective cover.

[0009] Furthermore, a distance sensor is also provided on the base; the sensor protective cover also covers the distance sensor, and a partition extends from the inner side of the sensor protective cover; the partition divides the space covered by the sensor protective cover into a first cavity and a second cavity, and the end of the partition abuts against the plane of the base away from the bottom plate; wherein, the first cavity is used to accommodate the distance sensor, and the second cavity is used to accommodate the metal sensor.

[0010] Furthermore, a first gap is spaced between the partition along its width direction and the inner side wall of the sensor protective cover. One end of the partition facing the first gap extends out a partition line plate in a direction away from the second cavity. The partition line plate is opposite to the inner side wall of the sensor protective cover and jointly defines a wire groove with the first gap.

[0011] Furthermore, a flange extends from the end of the partition line plate, and the flange is adapted to cooperate with the edge contour of the distance sensor near the wire groove.

[0012] Further, on one side of the pedal, a layout area is partitioned. A battery and a control module are arranged in the layout area. The control module switches at least the distance sensor and the metal sensor between the sleep state and the non-sleep mode according to a preset instruction.

[0013] Further, according to the preset instruction, the control module periodically wakes up at least the distance sensor and / or the metal sensor to switch from the sleep state to the non-sleep state.

[0014] Further, an acceleration sensor is further included. After detecting acceleration, the acceleration sensor sends a wake-up signal to the control module. After receiving the wake-up signal, the control module wakes up at least the distance sensor and / or the metal sensor to switch from the sleep state to the non-sleep state.

[0015] Further, after being woken up by the wake-up signal, the distance sensor and / or the metal sensor acquire detection data. If the detection data meets the preset conditions, it switches back to the sleep state.

[0016] Further, a relay module is further included. The relay module is adapted to receive and transmit signals from other anti-rolling devices or the control center, and correspondingly send them to the anti-rolling devices or the control center.

[0017] Further, an NFC recognition unit and a relay module are further included; after receiving the wake-up signal, the control module also receives the information of the NFC recognition unit. The NFC recognition unit is used to match with an external NFC device and send the result back to the control module; Further, a filtering module is further included. The filtering module is configured as a sub-module of the control module or as an independent module electrically connected to the control module and the acceleration sensor. The filtering module receives the continuous signal sent by the acceleration sensor and performs specific frequency band suppression based on a preset filtering algorithm, and then performs time-domain energy judgment on the filtered signal. If it meets the preset conditions, it is determined as valid data, otherwise it is filtered. Description of the Drawings

[0018] Figure 1 Schematic diagram of the anti-rolling device according to some embodiments of the present application; Figure 2 Exploded view of the anti-rolling device according to some embodiments of the present application; Figure 3 For Figure 2 Partial enlarged view of area A in ~ Figure 4 Exploded view of the anti-rolling device from another angle according to some embodiments of the present application; Figure 5Partial cross-sectional view of an anti-rolling shoe according to some embodiments of the present application; Figure 6 Schematic structural diagram of a sensor shield according to some embodiments of the present application; Figure 7 Exploded structural diagram of an anti-rolling shoe according to some other embodiments of the present application; Figure 8 Exploded structural diagram of an anti-rolling shoe observed from the rear according to some embodiments of the present application; Figure 9 Schematic internal structure diagram of an anti-rolling shoe according to some embodiments of the present application.

[0019] In the figure: 10 - Anti-rolling shoe; 110 - Bottom plate, 111 - Through hole, 112 - Handle; 120 - Pedal, 121 - Inclined plate, 122 - Side plate; 130 - Metal sensor; 140 - Distance sensor; 150 - Base, 151 - First threaded hole; 160 - Compression nut; 170 - Sensor protection cover, 171 - Partition board, 1711 - Line separating board, 1712 - Flange, 172 - Wire passing hole; 17a - First gap, 17b - Wiring groove; 180 - Intelligent module, 181 - Shell, 182 - Electric control board, 183 - Transceiving antenna, 184 - NFC identification unit; 190 - Battery. Detailed implementation manners

[0020] Next, in combination with the embodiments, the technical solutions of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0021] Refer to Figures 1 - 8 , the present invention provides a technical solution: Refer to Figure 1As shown in the figure, an anti-rolling steel shoe 10 in an embodiment of the present application includes a bottom plate 110 and a pedal 120 disposed on the bottom plate 110. One side of the pedal 120 is inclined relative to the bottom plate 110, and one side of the bottom plate 110 and one side of the pedal 120 are adapted to contact the wheel and generate a braking effect on the wheel. Specifically, the pedal 120 includes a sloping plate 121 at the front side and side plates 122 on both sides. The sloping plate 121 and the two side plates 122 enclose to form the pedal 120, and are fixed to the bottom plate 110 through the two end faces of the side plates 122. Refer to Figure 2 and Figure 3 As shown in the figure, a metal sensor 130 and a distance sensor 140 are disposed on the bottom plate 110. The metal sensor 130 detects whether there is a railway track below it, and the distance sensor 140 detects the distance between the wheel and itself. Then, based on the detection data fed back by the two, it is determined whether the anti-rolling steel shoe 10 fails or is removed from the guard.

[0022] Refer to Figure 4 As shown in the figure, a base 150 is disposed on the upper surface of the bottom plate 110. The base 150 is configured as a square and is fastened to the bottom plate 110 by bolts. The bolts include four bolts respectively disposed at the four corners of the base 150 to tightly press the lower surface of the base 150 against the upper surface of the bottom plate 110 to form a sealed connection. A first threaded hole 151 is configured at the center of the base 150, and the metal sensor 130 passes through the first threaded hole 151; Refer to Figure 5 As shown in the figure, the metal sensor 130 is configured as a columnar structure, and at least part of the outer periphery of the column is provided with a threaded surface and is matched with the aforementioned first threaded hole 151. The matching is based on the tight fitting of several threaded surfaces to form a sealed connection. In subsequent examples, it is described by taking the outer peripheral surface of the column being provided with a threaded surface as an example. A through hole 111 is opened at the bottom plate 110 directly below the base 150, so that the detection end of the metal sensor 130 screwed onto the base 150 can be located in the through hole 111 to detect the railway track below it.

[0023] Compared with the prior art where the entire metal sensor 130 needs to be encapsulated, resulting in a corresponding waterproof shell being sleeved on the outer periphery of the metal sensor 130, in the embodiment of the present application, the detection end of the metal sensor 130 is partially exposed below the base 150, so that there is no need to reserve space for the waterproof shell in the through hole 111. When the diameter of the through hole 111 on the bottom plate 110 remains unchanged, the diameter of the metal sensor 130 can be set larger. In this way, by increasing the diameter of the metal sensor 130, its magnetic field strength can be effectively increased, thereby increasing the induction distance, enabling it to reliably detect the presence of railway tracks at a farther distance, and overcoming the problem of false alarms of vehicle rolling due to insufficient detection distance caused by the too small volume of the original sensor.

[0024] On the other hand, the outer periphery of the sensor column is machined with a threaded surface, which is matched with the first threaded hole 151 preset on the base 150. There is a threaded matching section with sufficient length between the two, and the threaded engagement length between the sensor and the base 150 is significantly increased, making the connection more secure.

[0025] In some preferred examples, such as Figure 3 and Figure 5 shown, a compression nut 160 is also sleeved on the metal sensor 130. After the compression nut 160 is matched with the threaded surface on the outer periphery of the metal sensor 130, it is arranged above the base 150 to further increase the length of the threaded matching section and improve the stability of the setting.

[0026] Continuing to refer to Figures 1 - 5 shown, a sensor protective cover 170 is also covered above the distance sensor 140 and the metal sensor 130. The overall structure of the sensor protective cover 170 is wedge-shaped, and its inclined surface is basically the same as the inclined angle of the inclined plate 121 and protrudes the probe part of the distance sensor 140 on the inclined surface. The opening of the sensor protective cover 170 is matched with the edge of the base 150. As Figure 3 and Figure 4 shown, bolts are provided at the edge of the base 150 and the sensor protective cover 170 to connect the two. In this way, the part of the metal sensor 130 located on the side of the base 150 away from the bottom plate 110 makes the opening of the sensor protective cover 170 suitable for matching with the side of the base 150 away from the pedal 120 and forms a sealed cavity.

[0027] Specifically, the metal sensor 130 usually needs waterproof sealing at the lead interface, and the main body part and the exposed detection end of the metal sensor 130 do not need to be completely enclosed. In other words, the lead interface of the metal sensor 130 is covered by the protective cover, which can effectively isolate moisture from invading the electrical connection part; while the sensor column and the detection end can be kept in an unsealed state, so as to increase the diameter of the metal sensor 130 and improve the detection distance while maintaining the waterproof effect.

[0028] As described above, a distance sensor 140 is also provided on the base 150, and the distance sensor 140 is arranged on a plane on the side of the base 150 away from the bottom plate 110.

[0029] Continuing to refer to Figure 5 , the sensor protective cover 170 also covers the distance sensor 140 inside, and a partition 171 extends out on the inner side of the sensor protective cover 170; as Figure 6 shown, one side of the partition 171 is a plane, and the other side is an arc surface, and the arc surface is matched with the columnar surface of the metal sensor 130.

[0030] The end of the partition plate 171 abuts against one side plane of the base 150 away from the bottom plate 110. The partition plate 171 divides the space covered by the sensor protective cover 170 into a first chamber and a second chamber. The volume of the first chamber closer to the inclined surface is smaller than that of the second chamber. Correspondingly, the first chamber houses the distance sensor 140 with a smaller occupied space, and the second chamber houses the metal sensor 130 with a larger occupied space.

[0031] It should be noted that the distance sensor 140 usually requires higher waterproof requirements because its internal precise optical or electronic components are highly sensitive to moisture intrusion, which may lead to a decrease in detection accuracy or functional failure. For this reason, the first chamber can form a sealed chamber through the partition plate 171. The end of the partition plate 171 tightly abuts against one side plane of the base 150 away from the bottom plate 110, and an independent and isolated space is constructed in the closed environment of the sensor protective cover 170.

[0032] Specifically, the partition plate 171 forms a first gap 17a along its width direction (i.e., the direction parallel to the front and rear side walls of the sensor protective cover 170) with the inner side wall of the sensor protective cover 170. One end of the partition plate 171 facing the first gap 17a extends out a partition line plate 1711 in the direction away from the second chamber. The partition line plate 1711 faces the inner side wall of the sensor protective cover 170 and jointly defines a wire groove 17b with the first gap 17a. In detail, the wires of both the distance sensor 140 and the metal sensor 130 need to be connected from the outside. For example Figure 6 As shown, a wire passing hole 172 is provided on one side wall of the sensor protective cover 170, and the wire passing through the wire passing hole 172 can be led from the second chamber to the first chamber through the aforementioned wire groove 17b.

[0033] A flange 1712 also extends from the end of the partition line plate 1711. The flange 1712 cooperates with the edge contour of the distance sensor 140 near the wire groove 17b to form a waterproof connection structure. Thus, only the part with gaps in the first chamber needs to be waterproof sealed with glue, which reduces costs and production time at the same time.

[0034] Furthermore, in the case of detecting parts such as wheels based on the distance sensor 140 and / or the metal sensor 130, since electronic components such as the distance sensor 140 and / or the metal sensor 130 need to be continuously powered by the battery 190, and the anti-slip shoe 10 needs to work for a long time after being arranged, there is a problem of insufficient battery life of the battery 190.

[0035] In some embodiments, in combination with Figure 1 and Figure 7 、 Figure 8 Understand that one side of the pedal 120 contacts the wheel, and the other side participates in delimiting the arrangement area.

[0036] Specifically, one side of the pedal 120 away from the wheel is open, so the pedal 120 separates this part of the area from the wheel, and an intelligent module 180 for implementing a series of electronic control operations such as signal acquisition and communication is provided at the opening. The intelligent module 180 includes a housing 181 and an electronic control board 182 disposed within the housing 181; correspondingly, a battery 190 is disposed within the semi-closed space enclosed by the inclined plate 121 and the two side plates 122. A number of electronic components are provided on the electronic control board 182 to implement various functions. Here, the module integrating the necessary electronic units on the electronic control board 182 is defined as the control module.

[0037] Of course, the control module can be an integration or a single element of any electronic component with system control and processing functions, such as a single-chip microcomputer or a chip; the user presets control instructions in the control module to switch at least the distance sensor 140 and / or the metal sensor 130 between the sleep state and the non-sleep mode.

[0038] The foregoing control instructions can be stored in the control module in a computer-readable form. For example, by locating the corresponding instruction segment in the ROM of the single-chip microcomputer, the CPU quickly reads and decodes the instructions and converts them into operations such as data reading and writing and logical operations to switch the distance sensor 140 and / or the metal sensor 130 between the sleep state and the non-sleep mode. Of course, specifically how to set a computer program and other readable media in the control module can be achieved by those skilled in the art according to well-known means. Replacing the above programming method or data processing method in other ways should all fall within the protection scope of this application.

[0039] In fact, after the anti-rolling device 10 is correctly placed in position, its state (i.e., whether the anti-rolling device 10 effectively jams the wheel or is disarmed) is usually relatively stable for a period of time, and it is not necessary for the distance sensor 140 and the metal sensor 130 to continuously obtain information.

[0040] Therefore, according to the preset control instructions, the control module can at least switch the distance sensor 140 and the metal sensor 130 between the sleep state and the non-sleep mode (i.e., the working state). In the sleep state, the distance sensor 140 and the metal sensor 130 can be stopped from working or enter a standby state with extremely low power consumption, significantly reducing energy consumption; in the non-sleep mode, the distance sensor 140 and the metal sensor 130 resume their normal detection functions. The control module can be set to periodically wake up the distance sensor 140 and the metal sensor 130 for a short detection, such as once a minute or every few minutes, or only when specific conditions are met, such as when an abnormal vibration is sensed by the built-in accelerometer to trigger the wake-up of the distance sensor 140 and the metal sensor 130. This intermittent working mode minimizes the ineffective working time of the distance sensor 140 and the metal sensor 130 on the premise of ensuring the timely capture of the failure of the rail brake, such as the accidental separation or disarming of the wheel, thus saving the energy consumption of the battery 190 and effectively solving the core problem of the insufficient battery life in the prior art.

[0041] Of course, the components that can be switched between the sleep state and the non-sleep mode are not limited to the distance sensor 140 and the metal sensor 130, but also include other components of the system that enter the sleep state according to actual needs. For example, during non-detection periods, the battery management module (if any) can enter a low-power state. Another example is the wireless communication module (such as for sending alarm information). During periods when communication is not required, this module can be deeply asleep and only be woken up and briefly work when an alarm is needed, etc.

[0042] Next, some different ways of implementing the switching between the sleep state and the non-sleep mode will be described in detail.

[0043] In some examples, the control module wakes up the distance sensor 140 and / or the metal sensor 130 regularly according to the preset instructions to switch from the sleep state to the non-sleep state.

[0044] Specifically, a timer or a real-time clock (RTC) can be integrated in the electronic control board 182 or the control module. When the user or the system is initialized, a specific time interval value can be preset and written into the memory of the control module. This time interval defines the maximum sleep duration allowed between two effective detections of the distance sensor 140 and the metal sensor 130. After the control module executes the sleep instruction, its core processor or a specific low-power coprocessor (such as RTC) does not completely stop working, but enters an extremely low-power state that maintains the basic timing function.

[0045] When the accumulated time reaches the preset wake-up interval value, the timer generates a wake-up signal or an interrupt request. This signal triggers the core processor of the control module to resume from the low-power state to the normal operating state. The processor then executes the preset wake-up program. First, it powers on or sends wake-up instructions to the distance sensor 140, the metal sensor 130, and their necessary support circuits (such as signal conditioning circuits, analog-to-digital converter ADC). After the distance sensor 140 and the metal sensor 130 complete power-on, initialization, and stabilization, the control module commands the distance sensor 140 and the metal sensor 130 to perform a complete detection task, collecting the relative position or contact state information between the current anti-rolling shoe 10 and the wheel. The data collected is read, analyzed, and judged by the control module to confirm whether the shoe is still in an effective braking state or has been disarmed. After completing this detection and status evaluation, if no abnormal state change is found, the control module will again, according to the preset instructions, put the distance sensor 140, the metal sensor 130, and related high-power circuits into the sleep state, and at the same time reset the timer to start timing for the next sleep and wake-up cycle.

[0046] Exemplarily, the above wake-up interval can be preset to 3 minutes. This means that after the anti-rolling shoe 10 is correctly deployed, the control module will put the distance sensor 140 and the metal sensor 130 into the sleep state. Within the subsequent 3 minutes, the system only maintains the minimum timing function, and the distance sensor 140 and the metal sensor 130 are in a non-operating state (i.e., the sleep state). When the timer records 3 minutes, the system wakes up automatically: the distance sensor 140 and the metal sensor 130 are activated to perform a quick but complete detection, for example, measuring the distance to the wheel and whether the rail is detected. If the detection result shows that the shoe still firmly holds the wheel and has not been removed (i.e., the state is stable), then the detection data of this time is recorded or regarded as a valid maintenance signal, and then the distance sensor 140 and the metal sensor 130 immediately enter the sleep state again, the timer is reset to zero and starts accumulating the next 3-minute cycle. This process repeats continuously.

[0047] Thus, the actual working duration of the distance sensor 140 and / or the metal sensor 130 is compressed to an extremely short detection window within each cycle. During the sleep period, which occupies the vast majority of the cycle, the power consumption of the distance sensor 140 and / or the metal sensor 130 and other devices in the sleep state is close to zero, thereby greatly reducing power consumption and increasing the battery life of the battery 190.

[0048] In some examples, an acceleration sensor (such as a G-sensor) is also provided on the electronic control board 182. When the train carriage locked by the anti-rolling shoe 10 starts to roll back, if the wheels roll back towards the direction of the shoe, the pedal 120 and the bottom plate 110 of the anti-rolling shoe 10 are simultaneously stressed and slide relative to the track. Usually, violent shaking will occur during this sliding process and there will be an acceleration relative to the track movement. If the wheels roll back away from the direction of the shoe, the front pedal 120 of the anti-rolling shoe will usually be pressed, causing the entire anti-rolling shoe 10 to tilt up, generating an acceleration in the vertical direction. Or, since the anti-rolling shoe 10 is arranged outdoors, it is possible that non-staff maliciously pick up the anti-rolling shoe 10. At this time, the acceleration sensor will also trigger an induction and wake up the core components of the intelligent module 180. Thus, the acceleration sensor in this example sends a wake-up signal to the control module after detecting the acceleration. After receiving the wake-up signal, the control module wakes up at least the distance sensor 140 and the metal sensor 130 to switch from the sleep state to the non-sleep state.

[0049] Preferably, a six-axis acceleration sensor is selected as the acceleration sensor to adapt to the above-mentioned various rolling-back situations. For example, for the sliding caused by the wheels rolling back towards the direction of the shoe, this process is usually accompanied by the translation and violent shaking of the shoe in the track plane. The three-axis accelerometer in the six-axis distance sensor 140 can capture the significant linear acceleration changes in the horizontal direction (X-axis and / or Y-axis) generated thereby, and even the instantaneous impact acceleration. For the situation where the shoe tilts up due to the wheels rolling back away from the direction of the shoe, the wheel pressing the inclined plate 121 will lift the tail of the shoe, generating a rotational movement around the horizontal axis (Y-axis), which will cause a movement in the Z-axis, and it can also detect the acceleration changes in the corresponding direction.

[0050] Thus, during a long period when the state of the anti-rolling shoe 10 is stable and there is no abnormal movement, the overall system only maintains monitoring in an extremely low-power consumption mode. The distance sensor 140, the metal sensor 130, and most of the circuits are in deep sleep, and the energy consumption is reduced to the lowest. Only when a real rolling-back occurs, the high-power consumption distance sensor 140, the metal sensor 130, etc. are awakened based on the above-mentioned acceleration sensor, thereby ensuring the battery life.

[0051] It is worth noting that when the anti-rolling shoe 10 is disarmed, the staff will also pick up the anti-rolling shoe 10. To distinguish whether there is a malicious situation, in some examples, as Figure 9 shown, an NFC identification unit 184 is also provided on the anti-rolling shoe 10.

[0052] Specifically, when the acceleration sensor detects abnormal movement and triggers the system wake-up, while the control module activates the distance sensor 140 and the metal sensor 130 for status detection, it will also immediately start the electronic components related to the NFC recognition unit 184 in the intelligent module 180. For example Figure 9 , the NFC recognition unit 184 is set on the intelligent module 180.

[0053] When an authorized staff member is performing the disarming operation, they can bring a pre-issued and system-registered dedicated NFC work permit or tool close to the NFC recognition area on the anti-rolling shoe 10 for swiping. The NFC recognition unit 184 will read the unique identity information in the card. For example, through the verification program built into the control module, it will compare it with the authorized information library stored in the secure memory. When the control module confirms that the swiped NFC information is valid and belongs to the authorized list, it determines that the current movement of the device is a legal disarming behavior, and the system will not trigger any alarm signal. Conversely, if within a preset time window after the system is woken up by the acceleration sensor, such as 30 seconds, the NFC recognition unit 184 fails to detect any swiping operation, or the detected NFC information fails to pass the authorization verification, the control module will immediately determine that this movement is unauthorized, and the system will then trigger an alarm.

[0054] Of course, in some examples, specific acceleration and / or angular velocity thresholds can also be preset in the firmware or software that controls the acceleration sensor by the control module. Or, the acceleration sensor can only be triggered after reaching a certain acceleration. In this way, normal weak environmental vibrations, such as wind and vibrations caused by passing nearby trains, can be distinguished from actual situations such as vehicle rolling.

[0055] For example, when the acceleration sensor detects that the acceleration value or angular velocity value in any axis continuously exceeds the preset threshold for a certain period of time, etc., it is determined that an abnormal situation such as vehicle rolling has occurred. At this time, the acceleration sensor will immediately generate a wake-up signal and send it to the control module, and the control module starts according to the wake-up signal it receives.

[0056] Furthermore, since the anti-rolling shoe 10 is arranged on the track, when the acceleration sensor detects abnormal movement, it may also be that other situations such as a passing train cause abnormal shaking and trigger the acceleration sensor to send a wake-up signal to the control module. Therefore, when the distance sensor 140 and the metal sensor 130 are woken up after the control module receives the wake-up signal, the distance sensor 140 and the metal sensor 130 can obtain detection data, and if the detection data meets the preset conditions, they will switch back to the sleep state.

[0057] Exemplarily, the preset conditions include a first threshold value pre-stored in the control module. The actual distance value measured by the distance sensor 140 is compared with the preset first threshold value to determine whether the distance between the wheel tread and the distance sensor 140 remains within the upper limit of the safe distance range. If the measured distance is less than or equal to the threshold value, it indicates that the wheel has not moved away, and the engagement position relationship between the anti-slip shoe and the wheel is still within the acceptable normal range. The preset conditions also include the output signal type of the metal sensor 130. If the metal sensor 130 clearly detects the unique metal characteristics of the rail below, the signal strength or characteristics meet the preset rail presence criterion, indicating that the bottom plate 110 of the anti-slip shoe 10 is still stably placed on the track without overall detachment or serious displacement.

[0058] If the above two conditions are simultaneously satisfied, the control module determines that the current abnormal movement signal belongs to "false trigger", and thus executes the instruction to restore the low-power state; here, how the control module controls and switches to the sleep mode refers to the above example and will not be elaborated here.

[0059] Furthermore, based on the solution described in the foregoing embodiment, when the train passes by and causes track vibration, it may be misjudged as a abnormal slipping by the acceleration sensor, resulting in unnecessary wake-up. If there are frequent false triggers, it will increase the number of invalid wake-ups of the distance sensor and the metal sensor 130, weakening the low-power advantage of the system.

[0060] In some examples, considering that although the environmental vibration generated by the passing of the train meets the acceleration threshold trigger condition, its frequency domain characteristics are distinguishable from those of real slipping. Therefore, the intelligent module 180 in this example further includes a filtering module. The filtering module can be a filter separately provided on the PCB and electrically connected to the control module and the acceleration sensor, or a virtual module implemented on the foregoing single-chip microcomputer serving as the control module to perform filtering. It receives the continuous signal sent by the acceleration sensor and performs specific frequency band suppression based on a preset filtering algorithm, and then performs time domain energy judgment on the filtered signal. If it meets the preset conditions, it is determined as valid data; otherwise, it is filtered.

[0061] Next, taking the filtering module as an IIR digital filter as an example for illustration, the IIR filter only requires 5 coefficients (second-order sections). The calculation amount per sampling point is 10 multiplications and additions. Energy detection uses sliding window summation, and the calculation amount is 3 squares / 3 additions. The total processing load per sampling point < 0.1 MIPS, which meets the low-power requirements in this embodiment.

[0062] First, considering that the typical energy concentration area of track vibration is in the frequency band of 5Hz ± 2Hz, while the coasting impact has a broadband characteristic, the environmental vibration components in the frequency band of 4Hz - 7Hz can be suppressed by a digital band-stop filter. Specifically, the digital filter selectively attenuates the frequency band of 5Hz ± 2Hz (the main frequency of train vibration) and retains the broadband characteristics of the coasting impact.

[0063] Taking the signal received by a six-axis acceleration sensor as an example, the original three-axis acceleration input is received: a n ={ a x n , a y n , a z n}; where a x n , a y n , a z n are the acceleration inputs of the x-axis, y-axis, and z-axis respectively.

[0064] The filtered output is calculated independently for each axis. Subsequently, taking the x axis as an example, the other axes are the same and will not be elaborated. The output at the current sampling point n is: y x n =0.95⋅ a x n −1.4⋅ a x n −1]+0.95⋅ a x n −2]+1.4⋅ y x n −1]−0.9⋅ y x n −2]; Assume the input is a 5 Hz sine vibration: a x n =sin(2 π ⋅5⋅100 n ​​​​​​​​​​​​​​) = sin(10 πn ); Substitute the input signal into the numerator term: 0.95 ⋅ a x n − 1.4 ⋅ a x n −1] + 0.95 ⋅ a x n −2] ≈ 0; The denominator term is the feedback of the historical output signal: 1.4 ⋅ y x n −1] − 0.9 ⋅ y x n −2]; In this way, through the feedback of the historical output signal, the denominator term forms a pole to enhance the suppression effect on the 5 Hz signal.

[0065] Finally, the output amplitude of the filter for the 5 Hz signal is attenuated to less than 10% of the input: ∣ y x n ∣ ≤ 0.1 ⋅ ∣ a x n ∣; Then the filtered signal is: y n = { y x n , y y n , y z n}, where, y y n , y z n corresponds to the output of the y axis and the z axis; the 5 Hz vibration component is eliminated, and other frequency components are retained or attenuated according to the filter frequency response. The same applies to signals in the 5 Hz ± 2 Hz frequency band and will not be elaborated. In the above formula, a n and a x ​​​​​​​​​​​​​​​n etc. all represent input signals, y n and y x n etc. all represent output signals. Subscripts are used to distinguish specific corresponding signals. n is the discrete-time index, representing the current sampling point.

[0066] Subsequently, perform time-domain energy judgment on the filtered signal. When the sum of the squares of the moduli of the three-axis acceleration vectors within three consecutive 50-millisecond windows all exceed 1.5 times the square of the gravitational acceleration, it is determined as a valid abnormal event. Thus, on the premise of ensuring that abnormal situations such as disarming and coasting are not misjudged as "false triggers", the number of awakenings is reduced as much as possible.

[0067] In some embodiments, a relay module is also provided on the electronic control board 182. Similarly, the relay module can be an integration of one or more electronic components. An exemplary relay module is a communication unit. During actual operation, the relay module of the anti-rolling shoe 10 can receive and transmit signals of other anti-rolling devices, and then send them to the control center; similarly, after receiving signals from the control center, it can also forward them to the corresponding anti-rolling devices, thus functioning as a relay device.

[0068] In addition, it should be noted that in addition to transmitting back the signals detected by its respective sensors, the anti-rolling shoe 10 also needs to transmit back position information.

[0069] Continuing to refer to Figure 7 , to ensure that signal transmission is not shielded by metal, the transceiver antenna 183 forms an angle of 45° - 60° with respect to the electronic control board 182; in this way, the antenna is neither shielded by the metal part above the intelligent module 180 in the pedal 120 nor interfered with by the handle 112 on the other side, and interference from the ground carrier is avoided. And since the anti-rolling shoe 10 is arranged under the locomotive, the locomotive itself will form a signal shield for it. Therefore, controlling the angle between the transceiver antenna 183 and the electronic control board 182 within 45° - 60° can avoid interference from human hands on the antenna signal during the process of transferring the anti-rolling shoe 10 by personnel, enabling the anti-rolling shoe 10 to transmit accurate position signals to the control center before being arranged under the locomotive.

[0070] The above is only the preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications, and environments, and can be changed within the scope of the concept described herein through the above teachings or the technology or knowledge in related fields. And any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present invention should fall within the protection scope of the appended claims of the present invention.​​

Claims

1. An anti-rolling iron shoe, comprising a bottom plate and a pedal provided on the bottom plate, one side of the bottom plate and one side of the pedal being adapted to contact the wheel of a locomotive, characterized in that, Further included are: A base, the base is arranged on one side surface of the pedal on the bottom plate, a metal sensor is arranged through the base, and the metal sensor is relatively fixed to the base. A seal is formed at the fixing position of the metal sensor and the base, and a seal is formed at the connection position of the base and the bottom plate; a through hole is formed on the bottom plate, and the detection end of the metal sensor is located in the through hole; And a sensor protective cover, the opening of the sensor protective cover is adapted to cooperate with the side of the base away from the pedal to form a sealed cavity, and the part of the metal sensor located on the side of the base away from the bottom plate is completely covered in the sensor protective cover.

2. The anti-rolling steel shoe according to claim 1, characterized in that, A distance sensor is further arranged on the base; the sensor protective cover also covers the distance sensor, and a partition extends out on the inner side of the sensor protective cover; The partition divides the space covered by the sensor protective cover into a first cavity and a second cavity, and the end of the partition abuts against the plane of the base away from the bottom plate; wherein, the first cavity is used to accommodate the distance sensor, and the second cavity is used to accommodate the metal sensor.

3. The anti-rolling iron shoe according to claim 2, characterized in that, The partition is spaced from the inner side wall of the sensor protective cover along its width direction to form a first gap, and a partition line plate extends from one end of the partition facing the first gap in a direction away from the second cavity. The partition line plate faces the inner side wall of the sensor protective cover and jointly defines a wire groove with the first gap; A flange further extends from the end of the partition line plate, and the flange is adapted to cooperate with the edge contour of the distance sensor near the wire groove.

4. The anti-rolling steel shoe according to claim 1, characterized in that One side of the pedal participates in spacing out an arrangement area, and a battery and a control module are arranged in the arrangement area. The control module switches at least the distance sensor and the metal sensor between a sleep state and a non-sleep mode according to a preset instruction.

5. The anti-rolling iron shoe according to claim 4, characterized in that, The control module periodically wakes up at least the distance sensor and / or the metal sensor according to a preset instruction to switch from the sleep state to the non-sleep state.

6. The anti-rolling steel shoe according to claim 5, characterized in that, An acceleration sensor is further included. After detecting the acceleration, the acceleration sensor sends a wake-up signal to the control module. After receiving the wake-up signal, the control module wakes up at least the distance sensor and / or the metal sensor to switch from the sleep state to the non-sleep state.

7. The anti-rolling iron shoe according to claim 6, characterized in that, After being woken up by the wake-up signal, the distance sensor and / or the metal sensor acquires detection data, and if the detection data meets the preset conditions, it switches back to the sleep state.

8. The anti-rolling steel shoe according to claim 6, wherein An NFC identification unit and a relay module are further included; After receiving the wake-up signal, the control module also receives the information of the NFC identification unit. The NFC identification unit is used to match with an external NFC device and send the result back to the control module; The relay module is adapted to receive and send signals of other anti-sliding devices or a control center, and send them to the anti-sliding devices or the control center correspondingly.

9. The anti-rolling iron shoe according to claim 6, characterized in that: A filtering module is further included. The filtering module is configured as a sub-module of the control module or as an independent module electrically connected to the control module and the acceleration sensor; The filtering module receives the continuous signal sent by the acceleration sensor and performs specific frequency band suppression based on a preset filtering algorithm, and then performs time domain energy judgment on the filtered signal. If it meets the preset conditions, it is determined as valid data; otherwise, it is filtered.

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