Locking detection device for mining anti-explosion trackless rubber-tyred vehicle

Abstract

The utility model discloses a locking detection device for a mining anti-explosion trackless rubber-tyred vehicle, which realizes accurate detection of vehicle door states and vehicle operation control through cooperative work of a multi-dimensional redundancy detector and a controller. The multi-dimensional redundancy detector comprises an electromagnetic induction sensor installed on the top of a vehicle door, a pressure strain sensor installed at the bottom of the vehicle door and a laser distance measuring sensor installed on the edge of the vehicle door, and the real closing state of the vehicle door is judged through the two-out-of-three logic. The controller is connected with the multi-dimensional redundancy detector, the vehicle driving unit and the braking unit and can control starting and braking of the vehicle according to the vehicle door state. Meanwhile, the device integrates functional modules of sound-light alarm, fault diagnosis, remote monitoring, a standby power supply and the like. The device effectively overcomes the defects of an existing detection mode, remarkably improves the running safety of the mining vehicle, reduces the accident risk caused by the fact that the vehicle door is not tightly closed, and is suitable for the complex mine operation environment.

Description

Technical Field

[0001] This utility model belongs to the technical field of safety equipment for mining machinery, and specifically relates to a locking detection device for explosion-proof trackless rubber-wheeled vehicles used in mining. Background Technology

[0002] Mining environments are complex, characterized by confined spaces, poor road conditions, and high levels of dust. As a crucial tool for transporting personnel and materials, the safe operation of explosion-proof trackless rubber-tired vehicles in mines is paramount. In actual operation, due to driver negligence and inadequate door detection devices, vehicles frequently start and drive with doors not fully closed.

[0003] Some existing mine explosion-proof trackless rubber-tired vehicles either lack door status detection devices, requiring drivers to rely solely on visual inspection to determine if the doors are closed—a method highly susceptible to errors due to factors like visibility and driving experience—or their door detection devices rely on simple mechanical structures for coarse checks (such as a single mechanical contact or a simple electronic switch, monitoring only a localized part of the door's position. Frequent vibrations underground can cause minor door displacements and leaks, and a single switch cannot detect partial closures or ajar openings, leading to a false "closed" judgment and potentially causing the vehicle to start with hidden dangers, increasing the risk of collisions and gas leaks). These devices cannot accurately determine if the doors are fully closed and are usually independent of the vehicle's starting system; even if an unclosed door is detected, it cannot prevent the vehicle from starting, failing to fundamentally eliminate safety hazards. Utility Model Content

[0004] To address the problems and shortcomings of the existing technology, this utility model provides a locking detection device for mine explosion-proof trackless rubber-tired vehicles. This device can accurately detect the status of the vehicle doors, effectively prevent the vehicle from starting with hidden dangers, significantly improve the operational safety of mine explosion-proof trackless rubber-tired vehicles, and reduce risks such as collisions and gas leaks.

[0005] This utility model is achieved through the following technical solution:

[0006] A locking detection device for a mine explosion-proof trackless rubber-tired vehicle includes a multi-dimensional redundant detector and a controller. Multiple multi-dimensional redundant detectors are installed on each door of the vehicle body. Each detector includes an electromagnetic induction sensor installed at the top of the door, a pressure strain sensor installed at the bottom of the door, and a laser rangefinder sensor installed at the edge of the door. If any two of the data from the electromagnetic induction sensor, the pressure strain sensor, and the laser rangefinder are in a closed state, the door is determined to be truly closed. The controller is connected to the multiple multi-dimensional redundant detectors, the vehicle drive unit, and the vehicle braking unit.

[0007] The multi-dimensional redundant detector combines electromagnetic induction sensors, pressure strain sensors, and laser rangefinders to detect the door's status from different dimensions. The electromagnetic induction sensor detects the magnetic closure between the door and the door frame, the pressure strain sensor monitors the pressure distribution on the door's bottom sealing strip, and the laser rangefinder measures the distance between the door frame and the door edge. If any two of these three data points indicate a closed state, the door is considered truly closed. This multi-dimensional redundant detection method significantly improves the accuracy and reliability of door closure detection compared to traditional single-sensor methods. For example, if one sensor misjudges the door's closure due to factors such as vibrations in a well, the other two sensors can still provide accurate data, preventing misjudgments of the door's status due to a single sensor malfunction. This effectively prevents the vehicle from starting with the door not fully closed, reducing safety risks.

[0008] Furthermore, the electromagnetic induction sensor includes a receiver mounted on the door frame and a transmitter mounted on the door. The magnetic closure degree between the door and the door frame is determined by detecting the distance between the transmitter and the receiver. It features a built-in dual Hall effect sensor with a redundant design; when one sensor fails, the other automatically takes over the detection, ensuring continuous and accurate detection. Utilizing neodymium iron boron permanent magnets, which are characterized by strong magnetism and high stability, it can operate stably in complex underground environments, effectively improving the reliability of door magnetic closure detection. Even under harsh conditions such as underground vibration and dust, it can accurately detect the magnetic attraction state between the door and the door frame, avoiding misjudgments of the door's status due to inaccurate magnetic attraction detection.

[0009] Furthermore, pressure strain sensors are arrayed and installed at the bottom of the door frame to comprehensively monitor the pressure distribution of the door's bottom sealing strip. Arranged equidistantly along the sealing strip, each pressure strain sensor utilizes a Wheatstone bridge, improving the accuracy and stability of pressure detection. Adjacent sensors are connected by flexible cables, which are wrapped with wear-resistant protective sleeves to withstand the vibrations of underground vehicles, preventing cable wear and ensuring reliable pressure data transmission. Insulating gaskets are placed between the pressure strain sensor array and the door frame to effectively prevent safety hazards such as leakage, ensuring safe operation of the device. By accurately monitoring the pressure distribution of the door's bottom sealing strip, conditions such as incomplete door closure or inadequate sealing can be detected promptly, further improving the accuracy of door closure detection.

[0010] Furthermore, the laser rangefinder sensor employs a semiconductor laser source, enabling precise measurement of the distance between the door frame and the door edge. With an IP68 protection rating, it boasts excellent waterproof and dustproof performance, adapting to the harsh, humid, and dusty environment of underground mines. By accurately measuring the distance between the door frame and the door edge, it can promptly detect situations such as incomplete door closure or gaps, providing crucial information for determining the door's closure status. Even in the harsh underground environment, it operates stably, ensuring the accuracy and reliability of door distance detection.

[0011] Furthermore, the audible and visual alarm unit is connected to the controller. When the controller determines that the door is not properly closed, it issues an audible and visual alarm signal, promptly reminding the driver that the door is not closed and preventing the driver from starting the vehicle due to negligence, thus further improving vehicle operation safety. The status indicator uses three-color LEDs, corresponding to three states: door closed, abnormal opening, and malfunction. The driver can intuitively understand the door status and the device's operation, facilitating timely action and improving driving safety and operational convenience.

[0012] Furthermore, the controller incorporates a built-in fault diagnosis module, capable of detecting faults in multi-dimensional redundant detectors and audible and visual alarm units, and displaying the fault information on the vehicle's display screen. This allows the driver to promptly understand the device's fault status, facilitating quick fault location and repair by maintenance personnel, reducing vehicle downtime, and improving vehicle operating efficiency. Simultaneously, it ensures the reliability and stability of the device, guaranteeing the normal operation of the door closure detection function.

[0013] Furthermore, the controller is connected to the vehicle's remote monitoring system, enabling real-time transmission of door status and fault information to the remote monitoring center. Management personnel can remotely monitor the vehicle door status and equipment operation in real time, promptly identify safety hazards and faults, and take appropriate measures to address them. This achieves remote monitoring and management of vehicle operation, improving the intelligence and safety of mine transportation management.

[0014] Furthermore, the electromagnetic induction sensor, pressure strain sensor, and laser rangefinder are all connected to the vehicle's power supply and backup power supply. When the vehicle's power supply fails or loses power, the backup power supply can automatically switch power to ensure that the sensors work normally and that the door closure detection function is uninterrupted. Even in the event of a sudden power outage, the door status can be continuously monitored to prevent the vehicle from starting when the door status is unknown, further improving the reliability and safety of the device.

[0015] The beneficial effects of this utility model are:

[0016] The locking detection device for mine explosion-proof trackless rubber-tyred vehicle of the present utility model accurately detects the door state from multiple dimensions through a multi-dimensional redundant detector, and combines with a controller to achieve linkage control with the vehicle drive unit and braking unit, ensuring that the vehicle starts in a safe state with the door fully closed. At the same time, the device also has functions such as sound and light alarm, status indication, fault diagnosis, remote monitoring and backup power supply, which can timely remind the driver, facilitate fault troubleshooting and remote management, and ensure the stable and reliable operation of the device under various conditions. This device effectively solves the problems of inaccurate door detection of existing mine explosion-proof trackless rubber-tyred vehicles and inability to prevent the vehicle from starting with hidden dangers, significantly improves the operation safety of mine explosion-proof trackless rubber-tyred vehicles, reduces the safety risks during mine transportation, and is of great significance for ensuring the life safety of mine operation personnel and the normal progress of mine production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The structural schematic diagram for illustrating a schematic implementation manner of a locking detection device for a mine explosion-proof trackless rubber-tyred vehicle in the present utility model;

[0018] Figure 2 The structural block diagram for illustrating a schematic implementation manner of a locking detection device for a mine explosion-proof trackless rubber-tyred vehicle in the present utility model.

[0019] List of components and reference numerals:

[0020] 1, vehicle body; 2, door; 3, electromagnetic induction sensor; 31, transmitter; 4, pressure strain sensor; 5, laser ranging sensor; 6, sound and light alarm unit. DETAILED DESCRIPTION OF THE EMBODIMENTS [[ID=ID=19]]

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] It should be noted that the terms of orientation such as left, right, up, down, front, and back in the embodiments of the present utility model are only relative concepts to each other or are referenced based on the normal use state of the product, that is, the traveling direction of the product, and should not be considered as having limitations.

[0023] In addition, it should also be noted that the dynamic terms such as "relative movement" mentioned in the embodiments of the present utility model not only refer to the change in position, but also include movements such as rotation and rolling where the position does not change relatively, but the state changes.

[0024] Finally, it should be noted that when a component is said to be "located on" or "set on" another component, it can be on the other component or may have an intervening component at the same time. When a component is said to be "connected to" another component, it can be directly connected to the other component or may have an intervening component at the same time.

[0025] like Figures 1 to 2 The locking detection device for a mine explosion-proof trackless rubber-tired vehicle shown herein specifically includes the following parts:

[0026] Multidimensional Redundancy Detector: Multiple multidimensional redundancy detectors are respectively installed on each door 2 of the vehicle body 1. The multidimensional redundancy detector includes an electromagnetic induction sensor 3 installed on the top of the door 2, a pressure strain sensor 4 installed on the bottom of the door 2, and a laser rangefinder 5 installed on the edge of the door 2. If any two of the data of the electromagnetic induction sensor 3, the pressure strain sensor 4, and the laser rangefinder 5 are in a closed state, then the door 2 is determined to be in a truly closed state.

[0027] Controller: The controller is connected to multiple multidimensional redundant detectors, vehicle drive units, and vehicle braking units respectively.

[0028] Preferably, the electromagnetic induction sensor 3 includes a receiver mounted to the door frame and a transmitter 31 mounted to the door 2. The receiver can detect the magnetic closure degree between the door 2 and the door frame based on the distance between the transmitter 31 and the receiver. The pressure strain sensor 4 is mounted in an array at the bottom of the door frame. The pressure strain sensor 4 can monitor the pressure distribution of the sealing strip at the bottom of the door 2. The laser rangefinder sensor 5 can measure the distance between the door frame and the edge of the door 2.

[0029] The electromagnetic induction sensor 3 has a built-in dual Hall element and is designed for redundancy. When a single element fails, the other element automatically takes over the detection. The electromagnetic induction sensor 3 uses a neodymium iron boron permanent magnet. The pressure strain sensor 4 is arranged at equal intervals along the bottom sealing strip of the door 2. Each pressure strain sensor 4 uses a Wheatstone bridge. The laser rangefinder sensor 5 uses a semiconductor laser source and can read the distance between the door 2 and the door frame. The laser rangefinder sensor 5 has an IP68 protection rating.

[0030] The device also includes an audible and visual alarm unit 6, which is connected to the controller. When the controller determines that the door 2 is not properly closed, the audible and visual alarm unit 6 emits an audible and visual alarm signal to remind the driver that the door 2 is not closed. The audible and visual alarm unit 6 also includes a status indicator light installed in the driver's cab. The status indicator light is connected to the controller via a control signal line and is a three-color LED light, corresponding to three states: door 2 closed, abnormally opened, and faulty.

[0031] Adjacent sensors in the pressure strain sensor array 4 are connected via flexible ribbon cables, which are wrapped with wear-resistant protective sleeves. Insulating gaskets are placed between the pressure strain sensor array 4 and the door frame. The controller has a built-in fault diagnosis module that can detect faults in the multi-dimensional redundant detectors and the audible and visual alarm unit 6, and display the fault information on the vehicle's display screen. The controller communicates with the vehicle's remote monitoring system, enabling real-time transmission of door 2 status information and fault information to the remote monitoring center. Furthermore, the device includes a backup power supply; the electromagnetic induction sensor 3, pressure strain sensor 4, and laser rangefinder sensor 5 are all connected to the vehicle's power supply and the backup power supply.

[0032] In one embodiment, the locking detection device of this utility model is installed on a mine explosion-proof trackless rubber-tired vehicle used in a coal mine. An electromagnetic induction sensor 3 is installed at the top of the door 2, with its transmitter 31 mounted on the door 2 and its receiver mounted at the corresponding position on the door frame. It uses a neodymium iron boron permanent magnet and incorporates dual Hall effect elements with a redundant design. At the bottom of the door 2, pressure strain sensors 4 are arranged in an array along the bottom sealing strip of the door 2. Ten pressure strain sensors 4 are evenly spaced, each using a Wheatstone bridge circuit. Adjacent sensors are connected by flexible cables wrapped with wear-resistant protective sleeves. An insulating gasket is provided between the array of pressure strain sensors 4 and the door frame. A laser rangefinder sensor 5, using a semiconductor laser source, with an IP68 protection rating, is installed at the edge of the door 2.

[0033] The multidimensional redundant detector is connected to the controller via a data cable. The controller is connected to the vehicle drive unit, vehicle braking unit, and audible and visual alarm unit 6. The audible and visual alarm unit 6 includes a status indicator light installed in the driver's cab, which is a tri-color LED light. The controller has a built-in fault diagnosis module and communicates with the vehicle's remote monitoring system. It also provides backup power for the electromagnetic induction sensor 3, pressure strain sensor 4, and laser rangefinder sensor 5.

[0034] When the vehicle is ready to start, the multi-dimensional redundant detectors begin to operate. Electromagnetic induction sensor 3 detects the magnetic closure between door 2 and the door frame, pressure strain sensor 4 monitors the pressure distribution of the sealing strip at the bottom of door 2, and laser rangefinder 5 measures the distance between the door frame and the edge of door 2. If any two of these sensors show that door 2 is closed, the controller determines that door 2 is truly closed and allows the vehicle to start. If this condition is not met, the controller determines that door 2 is not truly closed and immediately controls the audible and visual alarm unit 6 to issue an audible and visual alarm signal. At the same time, the status indicator light shows that door 2 is abnormally open, reminding the driver that door 2 is not closed, and the vehicle drive unit cannot start, thus preventing the vehicle from starting with potential hazards. During vehicle operation, the fault diagnosis module performs real-time fault detection on the multi-dimensional redundant detector and the audible and visual alarm unit 6. If a fault is detected, that is, at least two sets of data from the electromagnetic induction sensor 3, the pressure strain sensor 4, and the laser rangefinder 5 change to the door 2 open state during driving, it is determined that the door 2 is faulty or the multi-dimensional redundant detector is faulty. The fault information is displayed on the vehicle display screen and transmitted to the remote monitoring center in real time, so that maintenance personnel can handle it in a timely manner.

[0035] During operation, when the vehicle encounters severe vibrations while driving underground, one of the Hall elements in the electromagnetic induction sensor 3 malfunctions. However, due to its redundant design, the other Hall element automatically takes over the detection, ensuring that the magnetic closure detection of door 2 remains unaffected. If door 2 experiences slight displacement due to vibration, the pressure strain sensor 4 and the laser rangefinder 5 can promptly detect the change in door 2's state. Based on the detection data, the controller determines that door 2 is not truly closed and immediately triggers the audible and visual alarm unit 6 to prevent the vehicle from continuing to drive, thus avoiding a safety accident. Simultaneously, the fault diagnosis module detects the fault in electromagnetic induction sensor 3 and promptly feeds the fault information back to the driver and the remote monitoring center for timely repair.

[0036] In actual operation, when the vehicle's power supply fails, the backup power supply automatically switches to ensure the multi-dimensional redundancy detector functions normally and continues to monitor the status of door 2. If door 2 is not fully closed at this time, the controller can still determine the status of door 2 based on the detection data from the multi-dimensional redundancy detector, control the audible and visual alarm unit 6 to issue an alarm signal, prevent the vehicle from starting, and ensure the safety of mine transportation. At the same time, the remote monitoring center can receive real-time information about door 2 not being closed and the backup power supply being operational, facilitating timely action by management personnel.

[0037] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. A locking detection device for a mine explosion-proof trackless rubber-tired vehicle, characterized in that, include: A multidimensional redundant detector is installed on each door of the vehicle body. The multidimensional redundant detector includes an electromagnetic induction sensor installed on the top of the door, a pressure strain sensor installed on the bottom of the door, and a laser rangefinder installed on the edge of the door. If any two of the data from the electromagnetic induction sensor, the pressure strain sensor, and the laser rangefinder are in a closed state, the door is determined to be in a truly closed state. The controller is connected to multiple multidimensional redundant detectors, vehicle drive units, and vehicle braking units.

2. The locking detection device for an explosion-proof trackless rubber-tired vehicle for mining according to claim 1, characterized in that, The electromagnetic induction sensor includes a receiver mounted on the door frame and a transmitter mounted on the door. The receiver can detect the magnetic closure degree between the door and the door frame based on the distance between the transmitter and the receiver. The pressure strain sensor is mounted in an array at the bottom of the door frame and can monitor the pressure distribution of the sealing strip at the bottom of the door. The laser rangefinder can measure the distance between the door frame and the edge of the door.

3. The locking detection device for a mine explosion-proof trackless rubber-tired vehicle according to claim 1, characterized in that, The electromagnetic induction sensor has a built-in dual Hall element and is designed for redundancy. When one element fails, the other element automatically takes over the detection. The electromagnetic induction sensor uses a neodymium iron boron permanent magnet. The pressure strain sensor is arranged at equal intervals along the bottom sealing strip of the door. Each pressure strain sensor uses a Wheatstone bridge. The laser rangefinder uses a semiconductor laser source and can read the distance between the door and the door frame. The laser rangefinder has an IP68 protection rating.

4. The locking detection device for an explosion-proof trackless rubber-tired vehicle for mining according to claim 1, characterized in that, It also includes an audible and visual alarm unit, which is connected to the controller. When the controller determines that the door is not in a truly closed state, the audible and visual alarm unit emits an audible and visual alarm signal to remind the driver that the door is not closed.

5. The locking detection device for an explosion-proof trackless rubber-tired vehicle for mining according to claim 4, characterized in that, The audible and visual alarm unit also includes a status indicator light installed in the driver's cab. The status indicator light is connected to the controller via a control signal line. The status indicator light is a three-color LED light, corresponding to three states: door closed, abnormal opening, and malfunction.

6. The locking detection device for an explosion-proof trackless rubber-tired vehicle for mining according to claim 1, characterized in that, Adjacent sensors in the pressure strain sensor array are connected by flexible cables, which are wrapped with wear-resistant protective sleeves. An insulating gasket is provided between the pressure strain sensor array and the door frame.

7. The locking detection device for an explosion-proof trackless rubber-tired vehicle for mining according to claim 5, characterized in that, The controller has a built-in fault diagnosis module, which can detect faults in multi-dimensional redundant detectors and audible and visual alarm units, and display the fault information on the vehicle display screen.

8. The locking detection device for an explosion-proof trackless rubber-tired vehicle for mining according to claim 1, characterized in that, The controller is connected to the vehicle's remote monitoring system and can transmit door status information and fault information to the remote monitoring center in real time.

9. The locking detection device for an explosion-proof trackless rubber-tired vehicle for mining according to claim 1, characterized in that, It also includes a backup power supply, and the electromagnetic induction sensor, pressure strain sensor and laser rangefinder are all connected to the vehicle power supply and the backup power supply.

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