Safety protection device and control method thereof

Abstract

The invention discloses a safety protection device and a control method thereof. The safety protection device comprises a plurality of sets of protection structures linearly arranged on the side of a platform. The protection structure comprises two fixed seats fixedly arranged on the side of the platform, movable seats slidably connected with the fixed seats, a warning rope fixedly connected between the two movable seats, telescopic guide rails installed in the fixed seats and used for driving the movable seats to move up and down, and direct current motors installed in the fixed seats and used for providing power for the telescopic guide rails. The relay set is installed in the fixed seat and used for controlling the rotation direction of the direct current motor, the monitoring assembly is used for monitoring vertical movement of the movable seat, the controller is electrically connected with the monitoring assembly and the direct current motor, and the controller controls the direct current motor to operate according to data detected by the detection assembly. Corresponding protection can be provided for passengers, personal safety of the passengers can be guaranteed, multi-dimensional state monitoring and fault diagnosis can be carried out on the safety protection device in real time, and normal operation of the safety protection device can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of rail transportation technology, and in particular to a safety protection device and a control method thereof. Background Art

[0002] With the continuous deepening of urbanization, rail transit has been widely recognized by most countries and regions for its many advantages such as speed, convenience, comfort and environmental protection. Since high platforms originally did not involve platform protection devices, the platforms also adopted manual management by staff to ensure the safety of passengers. The platform was completely managed manually, the platform had a high density of personnel, and the work management personnel could not fully supervise it. The labor intensity was high and there were certain safety hazards. When platform protection devices were used instead of manual management, the platform protection devices would inevitably fail due to working hours, working environment and other reasons. Manual maintenance of platform protection devices could not directly locate the fault point, which would undoubtedly increase the maintenance cost of platform protection devices. Summary of the invention

[0003] Purpose of the invention: The first purpose of the present invention is to provide a safety protection device that can ensure the safety of passengers and reduce potential safety hazards.

[0004] The second object of the present invention is to provide a control method for a safety protection device.

[0005] Technical solution: The present invention discloses a safety protection device, comprising a plurality of protection structures linearly arranged on the platform side, wherein the protection structure comprises two fixed seats fixedly arranged on the platform side, a movable seat slidably connected to the fixed seats, a warning rope fixedly connected between the two movable seats, a telescopic guide rail installed inside the fixed seat and used to drive the movable seat to move up and down, a DC motor installed in the fixed seat for providing power to the telescopic guide rail, a relay group installed in the fixed seat for controlling the rotation direction of the DC motor, a monitoring component for monitoring the up and down movement of the movable seat, and a controller electrically connected to the monitoring component and the DC motor, and the controller controls the operation of the DC motor and thus controls the movement of the movable seat according to data detected by the detection component.

[0006] Furthermore, the monitoring component includes an upper limit travel switch and a lower limit travel switch installed on the fixed seat and used to monitor whether the movable seat reaches a predetermined position, a current sensor installed inside the fixed seat and used to monitor the current of the DC motor, a gear sensor installed inside the fixed seat and used to monitor the speed of the DC motor, and a photoelectric sensor transmitter and a photoelectric sensor receiver symmetrically installed on two fixed seats and adapted to each other.

[0007] Furthermore, a display screen electrically connected to the controller is installed on the fixing base, and an LED light and a buzzer electrically connected to the controller and used for warning are installed on the fixing base.

[0008] Furthermore, an emergency stop button directly electrically connected to the controller is installed on the fixing base; a power supply and a power switch for controlling the on and off of the power supply are fixedly installed in the fixing base, and the power supply is electrically connected to the controller through the power switch.

[0009] Based on the same inventive concept, the present invention also discloses a control method for a safety protection device, comprising the following steps:

[0010] When the train arrives at the station, a rising signal is sent to the safety protection device, and the linear motor starts forward, causing the movable seat to rise. The LED light flashes during the rising process. The movable seat stops rising after it rises to the upward limit switch, and the LED light is always on.

[0011] When the train leaves the station, a descending signal is sent to the safety protection device, and the linear motor starts in reverse, causing the movable seat to descend. During the descent process, the LED light flashes. After the movable seat descends to the down limit switch, it stops descending and the LED light goes out.

[0012] When the movable seat is in the ascending or descending state, the photoelectric sensor transmitter and the photoelectric sensor receiver continuously detect whether there is a person passing through. If an object is detected, the buzzer alarms and the safety protection device stops running and continues to run after the person leaves;

[0013] During the operation of the safety protection device, the monitoring component performs multi-dimensional status monitoring of the safety protection device and obtains the status information of the safety protection device in real time, and transmits the status information to the controller in real time. The controller diagnoses faults of the safety protection device based on the status information and controls the operation of the safety protection device.

[0014] Furthermore, the fault diagnosis method is as follows:

[0015] The controller performs an initial diagnosis on the status information, obtains an initial diagnosis result, and controls the operation of the safety protection device based on the initial diagnosis result; wherein the initial diagnosis result includes a normal status, a major fault, and an abnormal status;

[0016] When the initial diagnosis result is an abnormal state, a secondary diagnosis is performed based on the corresponding state information, and the abnormal fault point is identified.

[0017] Furthermore, the status information includes A collected by the current sensor, V collected by the gear speed sensor, the running time T of the DC motor, and the distance S that the telescopic guide rail drives the movable seat to move up or down; wherein the distance S is calculated based on the running time T and V of the DC motor.

[0018] Furthermore, the operation of the safety protection device is controlled based on the initial diagnosis result as follows:

[0019] When the initial judgment result is that the status is normal, the safety protection device continues to operate;

[0020] When the initial judgment result is a major accident, the safety protection device shall be shut down immediately;

[0021] When the initial judgment result is an abnormal state, the safety protection device continues to operate, and after shutdown, the safety protection device is repaired on the spot based on the abnormal fault point identified by the secondary judgment.

[0022] Further, the method of the initial diagnosis is as follows:

[0023] A first speed threshold QV1, a second speed threshold QV2, a first current threshold QA1, a second current threshold QA2, a first distance threshold QS1 and a second distance threshold QS2 are set, and QV1>QV2, QA1>QA2, QS1>QS2;

[0024] When V>QV1, A>QA1, S>QS1, the current state is judged as a major fault;

[0025] When V<QV2, A<QA2, S<QS2, the current state is judged to be normal;

[0026] When V<QV1, A<QA1, S<QS1, and V>QV2 or A>QA2 or S>QS2 exists, the current state is determined to be abnormal.

[0027] Furthermore, the method of secondary diagnosis and identification of abnormal fault points is as follows:

[0028] Set the DC motor starting time to t;

[0029] When T>t, if V>QV2, A<QA2, S<QS2, the load is judged to be abnormal, and the abnormal fault point is located as the connecting shaft of the DC motor or the load on the connecting shaft is disconnected;

[0030] When T>t, if V>QV2, A>QA2, S<QS2, the voltage is judged to be abnormal, and the abnormal fault point is located as the connecting shaft of the DC motor or the load on the connecting shaft is blocked, or the telescopic guide is blocked;

[0031] When T>t, if V>QV2, A>QA2, S>QS2, it is judged that the detection component is abnormal, and the abnormal fault point is located as the current sensor or gear speed sensor is damaged;

[0032] When T>t, if V<QV2, A>QA2, S<QS2, the load is judged to be abnormal, and the abnormal fault point is located as the connecting shaft of the DC motor or the load on the connecting shaft is blocked, or the telescopic guide is blocked;

[0033] When T>t, if V<QV2, A>QA2, S>QS2, the position is judged to be abnormal, and the abnormal fault point is located as failure of the upper limit travel switch or damage of the DC motor;

[0034] When T>t, if V<QV2, A<QA2, S>QS2, the position is judged to be abnormal, and the abnormal fault point is located as failure of the upper limit travel switch or damage of the connecting shaft of the DC motor;

[0035] When T<t, if V>QV2, A<QA2, S<QS2, the load and current are judged to be abnormal, and the abnormal fault point is located as the connecting shaft of the DC motor or the load on the connecting shaft is blocked, or the current sensor is damaged;

[0036] When T<t, if V>QV2, A>QA2, S<QS2, the speed is judged to be abnormal, and the abnormal fault point is located as the connecting shaft of the DC motor or the load on the connecting shaft is blocked, or the telescopic guide is blocked, or the gear speed sensor is damaged;

[0037] When T<t, if V>QV2, A>QA2, S>QS2, the gear speed sensor is judged to be abnormal, and the abnormal fault point is located as the contact point between the gear speed sensor and the controller;

[0038] When T<t, if V<QV2, A>QA2, S<QS2, the current state is judged to be normal;

[0039] When T<t, if V<QV2, A>QA2, S>QS2, the position is judged to be abnormal, and the abnormal fault point is located as the contact point between the gear speed sensor and the controller;

[0040] When T<t, if V<QV2, A<QA2, S>QS2, the position is judged to be abnormal, and the abnormal fault point is located as the failure of the lower limit travel switch or the contact point between the gear speed sensor and the controller.

[0041] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: the present invention sets a protective structure between the train and the passengers, which can provide corresponding protection for the passengers and is conducive to ensuring the personal safety of the passengers. In the initial state and when the train leaves the station, the movable seat drives the warning rope to move downward, and the warning rope is between the two fixed seats and separates the passengers from the train. When the train stops at the station and the passengers get on and off the train, the movable seat drives the warning rope to move upward to the extreme position, which is convenient for passengers to pass between the two fixed seats. The monitoring component cooperates with the controller to perform multi-dimensional status monitoring and fault diagnosis of the safety protection device in real time, which is conducive to ensuring the normal operation of the safety protection device; and the secondary diagnosis can accurately locate the fault point, which is convenient for subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a front view of the present invention;

[0043] Figure 2 It is a structural schematic diagram of the fixing seat of the present invention;

[0044] Figure 3 is an internal circuit diagram of the present invention;

[0045] Figure 4 is the operating curve of the speed V when the safety protection device of the present invention is in normal state;

[0046] Figure 5 is the operating curve of the current A when the safety protection device of the present invention is in normal state;

[0047] Figure 6 It is the operating curve of the distance S when the safety protection device of the present invention is in normal state. DETAILED DESCRIPTION

[0048] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0049] Example 1

[0050] The present invention discloses a safety protection device, such as Figures 1 to 3As shown, it includes multiple groups of protective structures arranged linearly on the platform side. When in use, the protective structure is isolated between the passengers and the train, which is conducive to ensuring the personal safety of the passengers. The protective structure includes a fixed seat 1, a movable seat 2, a warning rope 3, a telescopic guide rail 4, a DC motor 5 and a controller. There are two fixed seats 1, and the two fixed seats 1 are symmetrically installed on the platform side. The movable seat 2 is slidably connected to the fixed seat 1, and the top of the movable seat 2 can extend to the top of the fixed seat 1. The warning rope 3 is fixedly connected between the two movable seats 2. The telescopic guide rail 4 and the DC motor 5 are both installed inside the fixed seat 1, and the movable seat 2 is fixedly connected to the movable part of the telescopic guide rail 4. The output shaft of the DC motor 5 is connected to the driving part of the telescopic guide rail 4, that is, the DC motor 5 drives the telescopic guide rail 4 to run after starting, and the telescopic guide rail 4 drives the movable seat 2 to rise or fall. The controller is installed in the fixed seat, and the controller is electrically connected to the DC motor 5 and the telescopic guide rail 4, that is, the controller controls the movement of the DC motor 5 and the telescopic guide rail 4. Preferably, a relay group for controlling the rotation direction of the DC motor 5 is installed in the fixing seat 1, and the relay group is electrically connected to the controller. Preferably, in order to improve the reliability and stability of the safety protection device, the controller adopts a redundant configuration, that is, it is equipped with a backup controller unit. When the main controller fails, the backup controller can seamlessly take over the control task to ensure the continuous operation of the safety protection device. In order to enhance the communication capability of the system, the controller supports a variety of communication protocols, such as Modbus, Profibus, Ethernet / IP, etc., so that the present invention can exchange data with different types of equipment and systems, and realize information sharing and remote control. In addition, the present invention also has a wireless communication function, and can be connected to a remote computer or mobile device through a wireless network, which is convenient for operators to monitor and manage the safety protection device at any location.

[0051] In the initial state, the warning rope 3 is located between the two fixed seats 1, that is, the movable seat 2 is in the lower limit position; the controller starts the DC motor 5 in the forward direction through the relay group, and the DC motor 5 drives the telescopic guide rail 4, so that the telescopic guide rail 4 drives the movable seat 2 to move upward, and the movable seat 2 drives the warning rope 3 to move upward synchronously, so that the warning rope 3 moves to the upper side, does not affect the passage of passengers, and facilitates passengers to get on and off the train after the train arrives at the station; the controller starts the DC motor 5 in the reverse direction through the relay group, and the DC motor 5 drives the telescopic guide rail 4, so that the telescopic guide rail 4 drives the movable seat 2 to move downward, and the movable seat 2 drives the warning rope 3 to move downward synchronously, so that the warning rope 3 moves between the two fixed seats 1, and the warning rope 3 isolates the passengers in the safe range on the platform side, which is beneficial to ensuring the personal safety of passengers when the train enters and exits the station.

[0052] A monitoring component for monitoring the up and down movement of the movable seat 2 is installed in the fixed seat 1. The monitoring component is electrically connected to the controller, and the controller controls the operation of the DC motor 5 according to the data detected by the detection component, thereby controlling the movement of the movable seat 2. The monitoring component includes an upper limit travel switch and a lower limit travel switch installed on the fixed seat 1 and used to monitor whether the movable seat 2 reaches the predetermined position, a current sensor installed inside the fixed seat 1 and used to monitor the current of the DC motor 5, a gear sensor installed inside the fixed seat 1 and used to monitor the speed of the DC motor 5, and a photoelectric sensor transmitter and a photoelectric sensor receiver symmetrically installed on the two fixed seats 1 and adapted to each other. When the movable seat 2 moves to the upper limit travel switch or the lower limit travel switch, the controller receives the signal of the upper limit travel switch or the lower limit travel switch, and stops the DC motor 5, so that the movable seat 2 stays at the upper limit position or the lower limit position. During the process of the movable seat 2 rising and falling, the photoelectric sensor transmitter and the photoelectric sensor receiver detect in real time whether there is a person passing through. If a person is detected to pass through, the controller stops the DC motor 5, and after receiving the signal from the photoelectric sensor transmitter and the photoelectric sensor receiver that the person has left, the controller continues to start the DC motor 5.

[0053] A power supply and a power switch for controlling the on and off of the power supply are fixedly installed in the fixing base 1, and the power supply is electrically connected to the controller through the power switch. A display screen 6 electrically connected to the controller is installed on the fixing base 1. In actual use, the display screen 6 can be used to broadcast and display train schedule information, abnormal warnings, etc. An LED light and a buzzer electrically connected to the controller and used for warning are installed on the fixing base 1. An emergency stop button directly electrically connected to the controller is also installed on the fixing base 1. When an emergency occurs, the emergency stop button can be used to directly stop the operation of the safety protection device.

[0054] Example 2

[0055] The present invention discloses a control method for a safety protection device, such as Figures 4 to 6 As shown, the following steps are included:

[0056] When the train arrives at the station, a rising signal is sent to the safety protection device, and the linear motor 5 starts forward, causing the movable seat 2 to rise. The LED light flashes during the rising process. The movable seat 2 stops rising after rising to the upward limit switch, and the LED light is always on. The movable seat 2 drives the warning rope 3 to rise to the limit position without affecting the passengers passing between the two fixed seats 1, making it convenient for passengers to get on and off the train.

[0057] When the train leaves the station, a descending signal is sent to the safety protection device, and the linear motor 5 starts in reverse, causing the movable seat 2 to descend. The LED light flashes during the descent process, and the movable seat 2 stops descending after descending to the down limit switch, and the LED light goes out; the movable seat 2 drives the warning rope 3 to descend to the extreme position, that is, the warning rope 3 is located between the two fixed seats 1, isolating the passengers in the safe range on the platform side.

[0058] When the movable seat 2 is in an ascending or descending state, the photoelectric sensor transmitter and the photoelectric sensor receiver continuously detect whether there is a person passing through. If an object is detected, the buzzer alarms and the safety protection device will stop running, and continue to run after the person leaves. The setting of the photoelectric sensor transmitter and the photoelectric sensor receiver is conducive to improving the safety of the movable seat 2 when it is ascending or descending, and preventing passengers from scrambling to pass.

[0059] During the operation of the safety protection device, the monitoring component performs multi-dimensional status monitoring of the safety protection device and obtains the status information of the safety protection device in real time, and transmits the status information to the controller in real time. The controller performs fault diagnosis on the safety protection device based on the status information and controls the operation of the safety protection device. Real-time fault diagnosis is conducive to the staff to understand the status of the safety protection device in real time, and based on the fault diagnosis results, it is convenient for the staff to accurately locate and repair the safety protection device in the future.

[0060] The status information includes A collected by the current sensor, V collected by the gear speed sensor, the running time T of the DC motor 5, and the distance S that the telescopic guide rail 4 drives the movable seat 2 up or down; wherein the distance S is calculated based on the running time T and V of the DC motor 5.

[0061] The fault diagnosis method is as follows:

[0062] The controller performs an initial diagnosis on the status information, obtains an initial diagnosis result, and controls the operation of the safety protection device based on the initial diagnosis result.

[0063] A first speed threshold QV1, a second speed threshold QV2, a first current threshold QA1, a second current threshold QA2, a first distance threshold QS1 and a second distance threshold QS2 are set, and QV1>QV2, QA1>QA2, QS1>QS2;

[0064] When V>QV1, A>QA1, S>QS1, the current state is judged as a major fault. When a major fault occurs, the buzzer sounds an alarm and immediately shuts down the safety protection device. Generally, the safety protection device is shut down by the controller. In an emergency or when the controller fails to respond in time, the on-site staff can directly shut down the safety protection device through the emergency stop button.

[0065] When V<QV2, A<QA2, S<QS2, the current state is judged to be normal; at this time, the safety protection device continues to operate.

[0066] When V<QV1, A<QA1, S<QS1, and V>QV2 or A>QA2 or S>QS2 exists, the current state is judged to be abnormal. When an abnormal state occurs, the safety protection device continues to operate and issues an abnormal warning. The abnormal warning can be issued by any one or more of the LED light, buzzer, and display screen, which can be set according to actual usage requirements.

[0067] When the initial diagnosis result is abnormal, a secondary diagnosis is performed based on the corresponding status information to identify the abnormal fault point. After shutdown or non-operating time, the staff can accurately repair the safety protection device based on the fault point identified by the secondary diagnosis result to prevent the staff from checking and repairing one by one. Checking and repairing one by one not only takes a long time, has low maintenance efficiency, but also has high work intensity and difficulty for the staff.

[0068] The method of secondary diagnosis and identification of abnormal fault points is as follows:

[0069] Set the starting time of DC motor 5 to t;

[0070] When T>t, if V>QV2, A<QA2, S<QS2, the load is judged to be abnormal, and the abnormal fault point is located as the connecting shaft of the DC motor 5 or the load on the connecting shaft is disconnected; during subsequent maintenance, the staff can directly inspect the connecting shaft of the DC motor 5.

[0071] When T>t, if V>QV2, A>QA2, S<QS2, the voltage is judged to be abnormal, and the abnormal fault point is located as the connecting shaft of the DC motor 5 or the load on the connecting shaft is blocked, or the telescopic guide 5 is blocked; during subsequent maintenance, the staff can directly inspect the connecting shaft of the DC motor 5 and the telescopic guide 5. Preferably, the working voltage of the DC motor 5 can be further measured to determine whether its working voltage is abnormal.

[0072] When T>t, if V>QV2, A>QA2, S>QS2, the detection component is judged to be abnormal, and the abnormal fault point is located as damage to the current sensor or gear speed sensor; during subsequent maintenance, the staff can directly inspect the current sensor and gear speed sensor.

[0073] When T>t, if V<QV2, A>QA2, S<QS2, the load is judged to be abnormal, and the abnormal fault point is located as the connecting shaft of the DC motor 5 or the load on the connecting shaft is blocked, or the telescopic guide rail 4 is blocked; during subsequent maintenance, the staff can directly inspect the connecting shaft of the DC motor 5 and the telescopic guide rail 4.

[0074] When T>t, if V<QV2, A>QA2, S>QS2, the position is judged to be abnormal, and the abnormal fault point is located as the failure of the upper limit travel switch or the damage of the DC motor 5; during subsequent maintenance, the staff can directly repair the upper limit travel switch and the DC motor 5.

[0075] When T>t, if V<QV2, A<QA2, S>QS2, the position is judged to be abnormal, and the abnormal fault point is located as the failure of the upper limit travel switch or the damage of the connecting shaft of the DC motor 5; during subsequent maintenance, the staff can directly inspect the upper limit travel switch and the DC motor 5.

[0076] When T<t, if V>QV2, A<QA2, S<QS2, the load and current are judged to be abnormal, and the abnormal fault point is located as the connecting shaft of the DC motor 5 or the load on the connecting shaft is blocked, or the current sensor is damaged; during subsequent maintenance, the staff can directly inspect the connecting shaft and current sensor of the DC motor 5.

[0077] When T<t, if V>QV2, A>QA2, S<QS2, the speed is judged to be abnormal, and the abnormal fault point is located as the connecting shaft of the DC motor 5 or the load on the connecting shaft is blocked, or the telescopic guide rail 5 is blocked, or the gear speed sensor is damaged; during subsequent maintenance, the staff can directly inspect the connecting shaft of the DC motor 5, the telescopic guide rail 5 and the gear speed sensor.

[0078] When T<t, if V>QV2, A>QA2, S>QS2, the gear speed sensor is judged to be abnormal, and the abnormal fault point is located as the contact point between the gear speed sensor and the controller; during subsequent maintenance, the staff can directly inspect the contact point between the gear speed sensor and the controller.

[0079] When T<t, if V<QV2, A>QA2, S<QS2, the current state is judged to be normal and no maintenance is required.

[0080] When T<t, if V<QV2, A>QA2, S>QS2, the position is judged to be abnormal, and the abnormal fault point is located as the contact point between the gear speed sensor and the controller; during subsequent maintenance, the staff can directly inspect the contact point between the gear speed sensor and the controller.

[0081] When T<t, if V<QV2, A<QA2, S>QS2, the position is judged to be abnormal, and the abnormal fault point is located as the failure of the lower limit travel switch or the contact point between the gear speed sensor and the controller; during subsequent maintenance, the staff can directly inspect the contact point between the lower limit travel switch, the gear speed sensor and the controller.

Claims

1. A safety protection device, characterized in that: The invention comprises a plurality of groups of protective structures arranged linearly on the side of a platform, wherein the protective structures comprise two fixed seats (1) fixedly mounted on the side of the platform, a movable seat (2) slidably connected to the fixed seats (1), a warning rope (3) fixedly connected between the two movable seats, a telescopic guide rail (4) mounted inside the fixed seats (1) and used for driving the movable seat (2) to move up and down, a DC motor (5) mounted inside the fixed seats (1) and used for providing power to the telescopic guide rail (4), a relay group mounted inside the fixed seats (1) and used for controlling the rotation direction of the DC motor (5), a monitoring component for monitoring the up and down movement of the movable seat (2), and a controller electrically connected to the monitoring component and the DC motor (5), wherein the controller controls the operation of the DC motor (5) and thereby controls the movement of the movable seat (2) according to data detected by the detection component.

2. The safety protection device according to claim 1, characterized in that: The monitoring component comprises an upper limit travel switch and a lower limit travel switch mounted on the fixed seat (1) and used to monitor whether the movable seat (2) reaches a predetermined position, a current sensor mounted inside the fixed seat (1) and used to monitor the current of the DC motor (5), a gear sensor mounted inside the fixed seat (1) and used to monitor the rotation speed of the DC motor (5), and a photoelectric sensor transmitter and a photoelectric sensor receiver symmetrically mounted on the two fixed seats (1) and adapted to each other.

3. The safety protection device according to claim 1, characterized in that: The fixing base (1) is provided with a display screen (6) electrically connected to the controller, and the fixing base (1) is provided with an LED light and a buzzer electrically connected to the controller and used for warning.

4. The safety protection device according to claim 1, characterized in that: The fixing base (1) is also provided with an emergency stop button which is directly electrically connected to the controller; a power supply and a power switch for controlling the on and off of the power supply are fixedly installed in the fixing base (1), and the power supply is electrically connected to the controller via the power switch.

5. A control method for a safety protection device according to any one of claims 1 to 4, characterized in that: The following steps are included: When the train arrives at the station, a rising signal is sent to the safety protection device, and the linear motor (5) is started in the forward direction, so that the movable seat (2) rises. During the rising process, the LED light flashes. After the movable seat (2) rises to the upward limit switch, it stops rising and the LED light is always on. When the train leaves the station, a descending signal is sent to the safety protection device, and the linear motor (5) is started in reverse, so that the movable seat (2) descends. During the descent process, the LED light flashes. After the movable seat (2) descends to the downward limit switch, it stops descending and the LED light goes out. When the movable seat (2) is in the ascending or descending state, the photoelectric sensor transmitter and the photoelectric sensor receiver continuously detect whether a person passes through. If an object is detected, a buzzer alarm is sounded and the safety protection device stops running and continues to run after the person leaves. During the operation of the safety protection device, the monitoring component performs multi-dimensional status monitoring of the safety protection device and obtains the status information of the safety protection device in real time, and transmits the status information to the controller in real time. The controller diagnoses faults of the safety protection device based on the status information and controls the operation of the safety protection device.

6. The control method of the safety protection device according to claim 5, characterized in that: The fault diagnosis method is as follows: The controller performs a primary diagnosis on the status information, obtains a primary diagnosis result, and controls the operation of the safety protection device based on the primary diagnosis result; The initial diagnosis results include normal status, major failure and abnormal status; When the initial diagnosis result is an abnormal state, a secondary diagnosis is performed based on the corresponding state information, and the abnormal fault point is identified.

7. The control method of the safety protection device according to claim 5, characterized in that: The state information includes A collected by the current sensor, V collected by the gear speed sensor, the running time T of the DC motor (5), and the distance S that the telescopic guide rail (4) drives the movable seat (2) upward or downward; wherein the distance S is calculated based on the running time T and V of the DC motor (5).

8. The control method of the safety protection device according to claim 6, characterized in that: The way to control the operation of the safety protection device based on the initial diagnosis results is as follows: When the initial diagnosis result is that the status is normal, the safety protection device continues to operate; When the initial diagnosis result is a major accident, the safety protection device will be shut down immediately; When the initial diagnosis result is an abnormal state, the safety protection device continues to operate and issues an abnormal warning, and after shutdown, the safety protection device is repaired on the spot based on the abnormal fault point identified by the secondary judgment.

9. The control method of the safety protection device according to claim 7, characterized in that: The initial diagnosis is as follows: A first speed threshold QV1, a second speed threshold QV2, a first current threshold QA1, a second current threshold QA2, a first distance threshold QS1 and a second distance threshold QS2 are set, and QV1>QV2, QA1>QA2, QS1>QS2; When V>QV1, A>QA1, S>QS1, the current state is judged as a major fault; When V<QV2, A<QA2, S<QS2, the current state is judged to be normal; When V<QV1, A<QA1, S<QS1, and V>QV2 or A>QA2 or S>QS2 exists, the current state is determined to be abnormal.

10. The control method of the safety protection device according to claim 9, characterized in that: The method of secondary diagnosis and identification of abnormal fault points is as follows: Set the starting time of the DC motor (5) to t; When T>t, if V>QV2, A<QA2, S<QS2, it is determined that the load is abnormal, and the abnormal fault point is located as the connecting shaft of the DC motor (5) or the load on the connecting shaft is disconnected; When T>t, if V>QV2, A>QA2, S<QS2, the voltage is judged to be abnormal, and the abnormal fault point is located as the connecting shaft of the DC motor (5) or the load on the connecting shaft is blocked, or the telescopic guide rail (4) is blocked; When T>t, if V>QV2, A>QA2, S>QS2, it is judged that the detection component is abnormal, and the abnormal fault point is located as the current sensor or gear speed sensor is damaged; When T>t, if V<QV2, A>QA2, S<QS2, it is determined that the load is abnormal, and the abnormal fault point is located as the connecting shaft of the DC motor (5) or the load on the connecting shaft is blocked, or the telescopic guide rail (4) is blocked; When T>t, if V<QV2, A>QA2, S>QS2, the position is judged to be abnormal, and the abnormal fault point is located as failure of the upper limit travel switch or damage of the DC motor (5); When T>t, if V<QV2, A<QA2, S>QS2, the position is judged to be abnormal, and the abnormal fault point is located as failure of the upper limit travel switch or damage of the connecting shaft of the DC motor (5); When T<t, if V>QV2, A<QA2, S<QS2, it is determined that the load and current are abnormal, and the abnormal fault point is located as the connecting shaft of the DC motor (5) or the load on the connecting shaft is blocked, or the current sensor is damaged; When T<t, if V>QV2, A>QA2, S<QS2, the speed is judged to be abnormal, and the abnormal fault point is located as the connecting shaft of the DC motor (5) or the load on the connecting shaft is blocked, or the telescopic guide rail (4) is blocked, or the gear speed sensor is damaged; When T<t, if V>QV2, A>QA2, S>QS2, the gear speed sensor is judged to be abnormal, and the abnormal fault point is located as the contact point between the gear speed sensor and the controller; When T<t, if V<QV2, A>QA2, S<QS2, the current state is judged to be normal; When T<t, if V<QV2, A>QA2, S>QS2, the position is judged to be abnormal, and the abnormal fault point is located as the contact point between the gear speed sensor and the controller; When T<t, if V<QV2, A<QA2, S>QS2, the position is judged to be abnormal, and the abnormal fault point is located as the failure of the lower limit travel switch or the contact point between the gear speed sensor and the controller.

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