Boarding bridge of flight simulator and control system

Abstract

The invention discloses a boarding bridge of a flight simulator and a control system. The boarding bridge comprises a boarding bridge platform 1, an electrical control cabinet 2, a folding guardrail mechanism 3, a bridge body 4 and a detection device 5, and the boarding bridge platform 1 is formed by assembling a bottom support, stand columns, a control cabinet mounting frame, supporting legs, a connecting plate, a platform and a platform guardrail through bolts; the electrical control cabinet internally comprises a PLC (Programmable Logic Controller), a circuit breaker, a contactor, a frequency converter, a connector and a button switch, and is used for monitoring the position state of the boarding bridge, acquiring and processing external door control information, bridge floor safety information and boarding bridge control signals of the motion platform controller, and performing motion execution; the folding guardrail mechanism 3 is of a pure mechanical structure, is formed by assembling a small bearing seat, a connecting rod, a connecting piece, a short connecting rod and a long connecting rod through a bearing, an anti-abrasion pad, a pin shaft and the like, and can be automatically folded and unfolded according to lifting of a bridge floor; the detection device 5 comprises a large bearing seat, a supporting tripod, a limiting switch, a hydraulic rod, an actuating cylinder and a bridge floor supporting seat, and the state monitoring function of the boarding bridge at various positions is achieved. The boarding bridge and the motion platform have an interlocking function, so that the boarding bridge and the motion platform are protected during misoperation.

Description

Technical Field

[0001] The invention belongs to the technical field of aviation engineering, and in particular relates to an aeroplane boarding bridge and a control system of a flight simulator. Background Art

[0002] Flight training simulators have unique advantages such as safety, economy, controllability, repeatability, risk-free, and not restricted by climatic conditions and site space. They can conduct both routine normal operation training and special handling training for various accidents (including catastrophic accidents).

[0003] As a passage for trainees to enter and exit the flight simulator, a boarding bridge needs to be designed between the corridor and the simulator. Before the flight simulator motion system is started, the boarding bridge needs to be folded to avoid collision with the simulator. At present, most simulator boarding bridges have the following problems: 1. There are multiple control handles on the boarding bridge and in the instructor control room. The control of the boarding bridge can send information through the motion platform software and the operator respectively, and the signal priority is realized through the software, which poses certain safety hazards; 2. The boarding bridge is specially designed according to the height of the simulator, and cannot realize the common functions of various models of simulators; 3. The control logic is too complicated, which reduces the reliability of the software. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a boarding bridge and control system for a flight simulator in view of the above-mentioned technical deficiencies.

[0005] The present invention provides a boarding bridge and control system for a flight simulator. The boarding bridge structure mainly includes a boarding bridge platform, a control cabinet, a folding guardrail mechanism, a bridge structure, and a detection device. It is characterized in that all components of the boarding bridge platform are assembled by bolts, which is convenient for installation and transportation; the control cabinet is placed on the side of the boarding bridge platform, which is convenient for observing the state of the boarding bridge when operating the control cabinet; the folding guardrails all realize the folding function through a mechanical structure, and have strong reliability; the bridge structure is welded by aluminum profiles or angle steels, and can be cut according to needs to adapt to different application occasions; the limit switches in the detection device are all installed at the bottom of the boarding bridge body, and do not need to be installed on the outside of the boarding bridge, which reduces the complexity of installation. At the same time, this boarding bridge has two control modes, automatic and manual, and can be applied in various occasions according to the interface design logic with the cross-linking equipment.

[0006] The entire boarding bridge is installed in front of the simulator entrance and exit, and is L-shaped as a whole. When it needs to be used, the electrical control cabinet or motion platform software is used to control the bridge body to be lowered and connected to the boarding bridge. Before the motion platform moves, the electrical control cabinet or motion platform software is used to control the boarding bridge to be raised to avoid interference with the simulator and other dangerous situations.

[0007] The boarding bridge platform includes a bottom bracket, a column, a control cabinet mounting frame, a supporting leg, a connecting plate, a platform, a platform guardrail, a control box, and a warning light.

[0008] The bottom bracket is assembled from I-beams or U-shaped steels by bolts, which is convenient for transportation and installation;

[0009] Furthermore, the length of the bottom bracket can be adaptively changed or removed according to the width of the trench below.

[0010] The column is composed of 4 U-shaped steels; the bottom of the column is fixed to the bottom bracket by bolts to provide support for the boarding bridge body, electrical control cabinet and other components;

[0011] The height of the column can be adaptively changed according to the needs of the site;

[0012] The control cabinet mounting frame is formed by folding sheet metal; the control cabinet mounting frame is folded into a U shape and fixed to the side of the column by bolts; an electrical control cabinet mounting hole is designed in the middle of the control cabinet mounting frame to facilitate fixing the electrical control cabinet by bolts;

[0013] Furthermore, all the mounting holes on the control cabinet mounting frame are designed as waist-shaped holes, which is convenient for eliminating errors in the processing and installation of the columns and is beneficial for later installation;

[0014] The control cabinet mounting frame is installed at a height of about 1.5m from the ground, which is convenient for personnel to operate;

[0015] Preferably, the upper part of the column platform is fixed to the house body by bolts to enhance the overall stability of the column platform;

[0016] There are two support legs, which are welded by U-shaped steel or I-shaped steel; the support legs are fixed to two of the columns by bolts; the place where the support legs contact the ground is fixed to the ground by chemical bolts; the support legs have two main functions: one is to provide support for the boarding bridge to prevent the bridge deck from shaking during the rising and falling process; the other is to provide a lap joint for the two front columns when installing the columns, which is convenient for installation;

[0017] The main function of the connecting plate is to connect the four columns together to form a whole; the connecting plate can be formed by folding sheet metal or cutting steel plates;

[0018] The motor mounting seat is mounted on the column by U-shaped steel through bolts; the motor mounting seat is provided with a motor mounting hole on the side thereof, including at least one positioning hole, and the motor bearing seat is fixed to the motor mounting seat through a shaft and then fastened by bolts;

[0019] Better yet, the mounting surface of the motor mounting seat is 90° to the electric cylinder actuator, which transmits the force of the electric cylinder actuation vertically to the electric cylinder support seat, preventing the electric cylinder bearing seat and the motor mounting seat from being tightened during long-term movement, thereby increasing safety;

[0020] The platform is fixed on the column by a thin steel plate through screws; there are reinforcing ribs under the platform;

[0021] Furthermore, the upper surface of the platform is crow's feet or stripes to prevent slipping and dangerous situations;

[0022] Furthermore, the platform may be designed with steps according to the height of the overlapped house bodies;

[0023] The platform guardrail is connected by aluminum materials; a thin plate is designed in the middle and upper part of the platform guardrail, which can be used for safety protection and can be sprayed or pasted with equipment and company logos;

[0024] The emergency stop control box is installed above the platform guardrail by screws; a two-position hold-press switch is installed on the emergency stop control box. When a dangerous situation occurs, after the operator presses the switch, the boarding bridge stops in the current state and no longer moves;

[0025] The warning light is red, green and yellow; the warning light is installed above the emergency stop control box; the green light is on when the boarding bridge program is fault-free and the boarding bridge is stationary, the yellow light is on when the boarding bridge program is normal and the boarding bridge is rising or falling, and the red light is on when the boarding bridge program reports an error or the boarding bridge is pressed with an emergency stop signal;

[0026] The folding guardrail mechanism is a connecting rod mechanism, including a small bearing seat, a connecting rod, a connecting piece, a short connecting rod, a long connecting rod, etc.; the small bearing seat is installed on the side of the above-mentioned column and is installed together with the connecting piece through the connecting rod; a shaft is installed at the bottom of the short connecting rod, which is connected to the bearing on the side of the bridge body. When the boarding bridge is raised, the short connecting rod and the long connecting rod are folded under the pull of the connecting rod; when the boarding bridge is lowered, the short connecting rod is pushed by the connecting rod, and the short connecting rod and the long connecting rod are stretched out;

[0027] The short connecting rod and the long connecting rod are connected by a pin structure, and anti-wear pads are added on both sides to reduce the friction of the pin structure;

[0028] Preferably, the connecting rods of the folding armrest are connected by bearings; further, the bearings of the connecting rods of the armrests are connected by plane thrust ball bearings to prevent the armrests from shaking when in use;

[0029] The bridge structure includes a central bearing seat, a bridge body, a bridge deck, and a grating sensor;

[0030] The middle bearing seat is installed on the side of the column; when the bearing seat and the column are installed, a pin needs to be installed to reduce the shear force of the fastening bolts to ensure safety;

[0031] The bridge structure is assembled by aluminum profiles and assembled by T-shaped screws and flange nuts; the exterior of the bridge structure is wrapped by aluminum plates or composite plastic plates to increase the aesthetics; the side of the bridge structure is printed with the logo of the equipment or company; one end of the bridge is connected to the column platform through a bearing;

[0032] Preferably, the bridge body can be made of a lighter material to reduce the load on the motor;

[0033] The bridge deck is fixed to the bridge structure by steel plates through screws; the surface of the bridge deck has fish-foot patterns or stripes to increase friction and prevent slipping and danger;

[0034] When the boarding bridge is in a horizontal state, the other end of the bridge body is overlapped on the overlap platform of the simulator rear room body, and the bridge body of the boarding bridge forms a simply supported beam;

[0035] The grating sensor is installed on both sides of the bridge body at a height of 2 cm from the bridge deck to detect whether there are objects and people on the bridge deck;

[0036] Grating sensors are installed on both sides of the bridge body to monitor the safety of the bridge deck. When there are foreign objects on the bridge deck, the grating sensors send a signal to the electrical control cabinet, and the boarding bridge cannot be controlled to rise;

[0037] The detection device includes a large bearing seat, a supporting tripod, a limit switch, a hydraulic rod, an actuator, and a bridge deck supporting seat;

[0038] The large bearing seat and the supporting tripod are mounted on the side of the column by bolts;

[0039] The interior of the upper part of the supporting tripod is a hollow structure, which is convenient for installing a limit switch; the supporting tripod is made of steel to ensure the structural safety of the tripod;

[0040] The mounting hole of the supporting tripod is a waist-shaped hole, which is convenient for adjusting the height when installed on the column, thereby adjusting the horizontality of the boarding bridge deck;

[0041] The main functions of the supporting tripod are: 1) providing the lowest structural support for the boarding bridge structure; 2) providing installation space for the limit switch;

[0042] Furthermore, the support tripod is used as a force-bearing component of the boarding bridge. When it is installed with the boarding bridge column, it can be fixed with a pin first, and then the bracket and the column can be fixed with bolts to prevent the adjustment bracket from sliding down due to loose bolt fixation during use;

[0043] There are 6 limit switches in total, including 2 upper limit switches, 2 lower limit switches, 1 upper speed change switch, and 1 lower speed change switch; 2 upper limit switches and 2 lower limit switches are redundantly designed to prevent the limit switches from being damaged and causing damage to the boarding bridge structure; 1 upper speed change switch and 1 lower speed change switch are mainly used to send speed change signals to the motor for acceleration and deceleration functions during the operation of the boarding bridge, thereby reducing the operation time of the boarding bridge;

[0044] One end of the hydraulic rod is installed on the connecting plate of the column through a bearing seat, and the other end is installed on the lower part of the bridge structure through a bearing. The hydraulic rod provides support force to the boarding bridge to prevent motor failure during the operation of the boarding bridge and provide support force for the boarding bridge to maintain the current state;

[0045] The actuator cylinder is composed of a stepper motor and a ball screw; the motor controls the rotation speed of the motor by controlling the time interval of sending pulses; the ball screw has a reverse self-locking function. When the boarding bridge is in the process of being retracted, once the electric cylinder is powered off, the boarding bridge will not fall down and cause damage to equipment and personnel; the actuator cylinder is installed on the room body through a bearing; the output end of the actuator cylinder is installed on the bridge body through a hinge;

[0046] The hardware installation sequence of the boarding bridge is as follows: 1. Install the bottom bracket of the boarding bridge; 2. Install the columns, connecting plates, supporting legs, etc. of the boarding bridge; 3. Install the bearings, supporting tripods, and limit switches to the corresponding positions; 4. Use the overhead crane to install the boarding bridge body on the boarding bridge column platform through bearings; 5. Adjust the distance between the entire boarding bridge and the simulator, and fix the boarding bridge column platform to the ground with chemical bolts; 6. Install the actuator, folding guardrail mechanism, emergency stop control box and other components.

[0047] The present invention provides a boarding bridge and control system for a flight simulator, wherein the control system is mainly composed of an electrical control cabinet, an actuator and various limit switches. All internal and external signals of the boarding bridge are processed and responded to by a program in the control cabinet.

[0048] The electrical control cabinet is installed on the side of the column platform; the electrical control cabinet is provided with a status indicator light and an emergency stop button on the outside; the status indicator lights include an ascending indicator light, an ascending position indicator light, a descending indicator light, and a descending position indicator light; the emergency stop button is a two-position push-button with a self-locking switch;

[0049] The electrical control cabinet contains a PLC controller, a circuit breaker, a contactor, a frequency converter, a connector, and a button switch. The boarding bridge and the motion platform have an interlocking function to protect the boarding bridge and the motion platform in case of misoperation.

[0050] The electrical control cabinet has a "manual / automatic" mode switching switch, "up", "down" and "fault clearing" control button switches inside; the electrical control cabinet is locked and is not allowed to be opened at ordinary times to prevent accidental touch; the electrical control cabinet has only an "emergency stop" control button on the outside of the control cabinet, one on the control room, and one next to the three-color light of the corridor bridge; there are no other external control buttons outside the control cabinet to prevent human misoperation; in the electrical control cabinet, the PLC control program displays the operating status of the boarding bridge itself in real time through signal lights, including rising, rising to the position, descending, and descending to the position signals; the signal lights are grouped into four groups, and one group is installed inside the rear room of the simulator, on the instructor console under the machine, and on the electrical control cabinet; the three-color signal lights are installed on the instructor console on board, the instructor console under the machine, and the boarding bridge platform, respectively, to display the current operating status of the boarding bridge in real time;

[0051] The "manual / automatic" switch is used to switch the control mode of the boarding bridge. In the "manual" position, the boarding bridge can only be raised and lowered by the "up" and "down" buttons in the electrical control cabinet. In the "automatic" position, the boarding bridge can only be controlled by the motion platform. The "fault relief" button is used to restore the PLC control program. After a fault occurs, pressing this button can initialize the PLC control program and thus resolve the fault.

[0052] In the above modes, in automatic mode, the logic for controlling the boarding bridge to rise is: the boarding bridge can only be controlled to rise when the motion platform is at the lowest position, the mode switch is in automatic state, the boarding bridge is safe, the boarding bridge is at the lower limit position, and all safety doors are closed. If any of the conditions are not met, the boarding bridge will not rise regardless of whether it receives the rising signal;

[0053] In the above modes, in automatic mode, the boarding bridge descent logic is: the boarding bridge can be controlled to descend only when the motion platform is at the lowest position, the mode switch is in automatic state, the boarding bridge is at the upper limit position, and all safety doors are closed. If any of the conditions are not met, the boarding bridge will not descend regardless of whether it receives a descent signal;

[0054] In the above modes, in manual mode, the logic for controlling the boarding bridge to rise is: the boarding bridge can only be controlled to rise when the motion platform is at the lowest position, the mode switch is in manual state, the boarding bridge is safe, the boarding bridge is not at the upper limit position, and all safety doors are closed. If any of the conditions are not met, the boarding bridge will not rise regardless of whether it receives the rising signal;

[0055] In the above modes, in manual mode, the boarding bridge descent logic is: the boarding bridge can be controlled to descend only when the motion platform is at the lowest position, the mode switch is in manual state, the boarding bridge is not at the lower limit position, and all safety doors are closed. If any of the conditions are not met, the boarding bridge will not descend regardless of whether it receives a descent signal;

[0056] The boarding bridge controller PLC and the motion platform control cabinet transmit signals through dry contacts, each dry contact is normally open, a total of 9 channels; the boarding bridge controller PLC sends 5 signals to the motion platform control cabinet. They are "manual / automatic" mode, upper limit, lower limit, door limit, and safety light curtain signals; the motion platform control cabinet sends 4 signals to the boarding bridge controller PLC, which are rise, fall, alarm, and lowest position signals;

[0057] The transmission logic of each information is as follows:

[0058] 1) When the motion platform is at the lowest position, a signal is sent to the boarding bridge.

[0059] 2) When the motion platform sends "up" or "down", it outputs a signal respectively, and the three-color light of the boarding bridge turns yellow; when a fault occurs, the "alarm" switch is closed and outputs a signal, the three-color light of the boarding bridge turns red and the boarding bridge stops and locks itself in an emergency, and the green light turns on if no control signal is received.

[0060] 3) When the "mode" switch is normally open, it is in "automatic" mode, and when the "mode" switch is closed, it is in "manual" mode. This switch is a two-position "toggle switch".

[0061] 4) When the "lowest position" switch of the motion platform is closed, the "mode" switch is closed, and the "manual" control mode of the boarding bridge is effective, otherwise the manual operation is invalid.

[0062] 5) After the motion platform receives the "mode" closed signal (manual mode) sent by the boarding bridge, the "up" or "down" signal sent by the motion platform to control the boarding bridge is invalid. The boarding bridge can only be controlled after the "mode" switch is disconnected (automatic mode).

[0063] 6) If the "lowest position" sent by the motion platform is not in the closed state (regardless of power failure or other reasons), the "manual" mode of the boarding bridge is invalid, which is an illegal operation and the three-color light of the boarding bridge turns red.

[0064] 7) The boarding bridge can only ascend or descend when it receives the "lowest position" switch closing signal of the motion platform.

[0065] 8) When the boarding bridge is in "automatic" mode and the motion platform is controlling the lifting / lowering of the boarding bridge, it is manually switched to "manual" mode and the boarding bridge is in the "current" position and is self-locked (the boarding bridge motor has a power-off self-locking function). The lifting and lowering can only be manually controlled by operating the buttons in the control cabinet.

[0066] 9) The boarding bridge controller sends the collected sensor signals to the motion platform through dry contacts in real time, including the boarding bridge "upper limit", "lower limit", "door limit" and "safety light curtain". When there are people on the boarding bridge (i.e. the safety light curtain is closed), the boarding bridge controller cannot move regardless of whether it receives the "up" signal from the motion platform.

[0067] Through the above design, the electrical control cabinet logic can achieve the following functions:

[0068] (1) Boarding bridge rising function

[0069] The bridge deck is raised by clicking the "up" button in the boarding bridge control box or the PLC control program receives an external "up" signal.

[0070] (2) Boarding bridge rising function

[0071] The boarding bridge is controlled to "rise". After the bridge deck is raised to the maximum position, the rising limit switch is triggered, causing the boarding bridge to automatically stop moving.

[0072] (3) Emergency stop function for boarding bridge ascent

[0073] When the boarding bridge deck is being raised, the “emergency stop” button on the boarding bridge control box panel is clicked or the PLC control program receives an external “emergency stop” signal, and the bridge deck stops moving and remains in a self-locking static state;

[0074] (4) Boarding bridge descent function

[0075] By clicking the "down" button in the boarding bridge control box or the PLC control program receiving an external "down" signal, the bridge deck is controlled to be lowered;

[0076] (5) Function of lowering the boarding bridge into place

[0077] The boarding bridge is controlled to "descend". After the bridge deck descends to the maximum position, the descent limit switch is triggered, causing the boarding bridge to automatically stop moving.

[0078] (6) Emergency stop function for boarding bridge descent

[0079] When the boarding bridge deck is descending, the "emergency stop" button on the boarding bridge control box panel is clicked or the PLC control program receives an external "emergency stop" signal, and the bridge deck stops moving and remains in a self-locking static state;

[0080] (7) Three-color light function of boarding bridge

[0081] When the motion platform sends "up" or "down", the three-color light of the boarding bridge lights up yellow. When a fault occurs, the "alarm" switch is closed, the three-color light of the boarding bridge lights up red, and the green light is on if no control signal is received.

[0082] (8) Manual-automatic switching function

[0083] The boarding bridge control cabinet is equipped with an automatic / manual switch, which can realize automatic control and manual control according to actual needs.

[0084] (9) Emergency stop release function

[0085] In automatic and manual modes, after the emergency stop button is released, the boarding bridge remains in a self-locking state, and the boarding bridge can continue to operate by clicking the up or down button.

[0086] (10) Safety limit function

[0087] The soft limit and mechanical limit are in parallel relationship. When the bridge reaches the right position, the double limit is triggered at the same time, causing the boarding bridge to stop. The double limit makes up for the defect of sudden failure of a single limit, greatly improving the safety of the system.

[0088] (11) Safety light curtains and safety interlocks are installed on both sides of the boarding bridge deck.

[0089] The boarding bridge has a bridge deck sensing system. When someone stands on the bridge deck, the bridge deck sensing system will detect the person and feed back the detection signal to the boarding bridge control system. At this time, the boarding bridge cannot start the lifting program to ensure the safety of the personnel.

[0090] (12) Boarding bridge in position interlock function

[0091] The boarding bridge, motion platform and room structure are all equipped with electrical interfaces to protect the boarding bridge and motion platform in case of misoperation.

[0092] This system has the following beneficial effects:

[0093] 1. Compared with the existing boarding bridges, this boarding bridge has a higher degree of modularization, is easy to transport and assemble, and has low requirements for electric cylinders;

[0094] 2. The control system of this boarding bridge is simple, low-cost, safe and reliable;

[0095] 3. The installation positions of all sensors of this boarding bridge are inside the main body, which is self-contained and has good independence;

[0096] 4. This boarding bridge has a wide range of applications and can be installed in various other occasions where retractable boarding equipment is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0097] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0098] Figure 1 An overall schematic diagram of a boarding bridge provided by an embodiment of the present invention;

[0099] Figure 2 A schematic diagram of the boarding bridge platform structure provided by an embodiment of the present invention;

[0100] Figure 3 A schematic diagram of a boarding bridge detection device provided in an embodiment of the present invention;

[0101] Figure 4 A schematic diagram of the folding guardrail structure of a boarding bridge provided in an embodiment of the present invention;

[0102] Figure 5 A schematic diagram of the structure of a boarding bridge provided by an embodiment of the present invention;

[0103] Figure 6 A schematic diagram of a boarding bridge control cabinet panel provided in an embodiment of the present invention;

[0104] Figure 7 A schematic diagram of the electrical control cross-linking of a boarding bridge provided in an embodiment of the present invention;

[0105] Figure 8 A logic judgment diagram for controlling the raising of a boarding bridge in automatic mode provided by an embodiment of the present invention;

[0106] Fig. 9 A logic judgment diagram for controlling the descent of a boarding bridge in automatic mode provided by an embodiment of the present invention;

[0107] Fig.10 A logic judgment diagram for controlling the raising of a boarding bridge in manual mode provided by an embodiment of the present invention;

[0108] Fig.11 A logic judgment diagram for controlling the descent of a boarding bridge in manual mode provided by an embodiment of the present invention;

[0109] Fig.12 A schematic diagram of the PLC control program for the boarding bridge provided in an embodiment of the present invention;

[0110] Fig.13 The boarding bridge PLC control program input principle provided by the embodiment of the present invention Figure 1 ;

[0111] Fig.14 The boarding bridge PLC control program input principle provided by the embodiment of the present invention Figure 2 ;

[0112] Fig.15 The boarding bridge PLC control program output schematic diagram provided by the embodiment of the present invention;

[0113] Description of reference numerals:

[0114] 1-boarding bridge platform; 2-electrical control cabinet; 3-folding guardrail mechanism; 4-bridge structure; 5-detection device; 101-bottom bracket; 102-column; 103-control cabinet mounting frame; 104-support leg; 105-small connecting plate; 106-large connecting plate; 107-motor mounting seat; 108-platform; 109-platform guardrail; 110-emergency stop control box; 111-warning light; 301-small bearing seat; 302-connecting rod; 303-connecting piece; 304-shaft; 305-short connecting rod; 306-long connecting rod; 401-middle bearing seat; 402-bridge body; 403-bridge deck; 404-grating sensor; 501-large bearing seat; 502 supporting tripod; 503-limit switch; 504-hydraulic rod; 505-actuator; 506-bridge deck support seat. DETAILED DESCRIPTION

[0115] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0116] Reference Figure 1 , which is a schematic diagram of the main structure of a boarding bridge for a flight simulator provided by the present invention. The boarding bridge structure mainly includes: a boarding bridge platform 1, a control cabinet 2, a folding guardrail mechanism 3, a bridge body 4, and a detection device 5.

[0117] Reference Figure 2 The boarding bridge platform 1 is composed of a bottom bracket 101, a column 102, a control cabinet mounting frame 103, a support leg 104, a small connecting plate 105, a large connecting plate 106, a motor mounting seat 107, a platform 108, a platform guardrail 109, an emergency stop control box 110, and a warning light 111;

[0118] The bottom bracket 101 is assembled from four U-shaped steels by screws and fixed to the ground by chemical bolts.

[0119] The column 102 is composed of 4 U-shaped steels; the bottom of the column 102 is fixed to the bottom bracket 101 by bolts to provide support for other components such as the boarding bridge body and the electrical control cabinet;

[0120] The control cabinet mounting frame 103 is folded from sheet metal; the control cabinet mounting frame 103 is folded into a U shape and fixed to the side of the column by bolts; a mounting hole for the electrical control cabinet 2 is designed in the middle of the control cabinet mounting frame 103, which is convenient for fixing the electrical control cabinet 2 by bolts;

[0121] The control cabinet mounting frame 103 is installed at a height of about 1.5m from the ground, which is convenient for personnel to operate;

[0122] All the mounting holes on the control cabinet mounting frame 103 are designed as waist-shaped holes;

[0123] There are two support legs 104, which are welded by U-shaped steel or I-shaped steel; the support legs 104 are fixed to two of the columns 102 by bolts; the place where the support legs 104 contact the ground is fixed to the ground by chemical bolts; the support legs 104 have two main functions: one is to provide support for the boarding bridge to prevent the bridge deck from shaking during the rising and falling process; the other is to provide a lap joint for the two columns 102 in front when installing the columns, which is convenient for installation;

[0124] There are five small connecting plates 105, which connect the columns 102 in the front and rear directions together;

[0125] There are 4 large connecting plates 106, which connect the left and right columns 102 together;

[0126] The motor mounting seat 107 is improved from the large connecting plate 106; it is mounted on the column 102 by bolts made of U-shaped steel; the side of the motor mounting seat 107 is provided with a mounting hole for the actuator 505, including at least one positioning hole, and the large bearing seat 501 of the motor is fixed to the motor mounting seat 107 through the shaft, and then fastened by bolts;

[0127] The platform 108 is made of a 2mm thin steel plate fixed on the column 102 by screws; there are reinforcing ribs under the platform 108 to enhance stability; the upper surface of the platform 108 is fish-foot pattern or stripes;

[0128] The platform guardrail 109 is made of aluminum material; a thin plate is designed in the middle and upper part of the platform guardrail 109, which can be used for safety protection and can be sprayed or pasted with equipment and company logos;

[0129] The emergency stop control box 110 is installed above the platform guardrail 109 by screws; a two-position hold-press switch is installed on the emergency stop control box 110;

[0130] The warning light 111 is installed above the emergency stop control box 110;

[0131] Reference Figure 4 The folding guardrail mechanism 3 is a connecting rod mechanism, including a small bearing seat 301, a connecting rod 302, a connecting piece 303, a shaft 304, a short connecting rod 305, a long connecting rod 306, etc.;

[0132] The small bearing seat 301 is installed on the side of the above-mentioned column 102, and is installed together with the connecting piece 303 through the connecting rod 302; the bottom of the short connecting rod 305 is installed with a shaft 304, which is connected to the bearing on the side of the bridge structure 4. When the boarding bridge is raised, the short connecting rod 305 and the long connecting rod 306 are folded under the pull of the connecting rod 302; when the boarding bridge is lowered, the short connecting rod 305 and the long connecting rod 306 are stretched out under the push of the connecting rod 302;

[0133] The short connecting rod 305 is connected to the long connecting rod 306 through a pin structure, and anti-wear pads are added on both sides;

[0134] Reference Figure 5 , the bridge structure 4 includes a central bearing seat 401, a bridge body 402, a bridge deck 403, and a grating sensor 404;

[0135] The middle bearing seat 401 is installed on the side of the column 102; when the bearing seat 401 and the column 102 are installed, a pin needs to be installed to reduce the shear force of the fastening bolts to ensure safety;

[0136] The bridge body 402 is made of aluminum profiles and assembled by T-shaped screws and flange nuts; the outside of the bridge body 402 is wrapped with an aluminum plate or a composite plastic plate to increase the aesthetics; the side of the bridge body 402 is printed with the logo of the equipment or company; one end of the bridge body 402 is connected to the column 102 platform through a bearing 401;

[0137] The bridge deck 403 is made of a 2mm steel plate fixed on the bridge body 402 by screws; the surface of the bridge deck 403 has fish-foot patterns or stripes to increase friction and prevent slipping hazards;

[0138] The grating sensors 404 are installed on both sides of the bridge body 402 at a height of 2 cm from the bridge deck 403;

[0139] Reference Figure 3 The detection device 5 includes a large bearing seat 501, a supporting tripod 502, a limit switch 503, a hydraulic rod 504, an actuator 505, and a bridge deck support seat 506;

[0140] The large bearing seat 501 and the supporting tripod 502 are mounted on the side of the column 102 by bolts;

[0141] The upper part of the supporting tripod 502 has a hollow structure inside, on which a limit switch 503 is installed; the supporting tripod 502 is made of steel to ensure the structural safety of the tripod 502;

[0142] The mounting hole of the supporting tripod 502 is a waist-shaped hole, which is convenient for adjusting the height when installed on the column 102, thereby adjusting the levelness of the boarding bridge deck 403;

[0143] When the support tripod 502 is installed on the boarding bridge column 102 as a boarding bridge, it can be fixed with a pin first, and then the support tripod 502 and the column 102 can be fixed with bolts to prevent the support tripod 502 from sliding down due to loose bolt fixation during use;

[0144] There are 6 limit switches 503, including 2 upper limit switches, 2 lower limit switches, 1 upper speed change switch, and 1 lower speed change switch. There are 2 upper limit switches and 2 lower limit switches, which are redundant designs to prevent the limit switches from being damaged and causing damage to the boarding bridge structure. There is 1 upper speed change switch and 1 lower speed change switch, which are mainly used to send speed change signals to the motor for acceleration and deceleration functions during the operation of the boarding bridge, thereby reducing the operation time of the boarding bridge.

[0145] One end of the hydraulic rod 504 is mounted on the connecting plate 107 of the column 102 through the bearing seat 501, and the other end is mounted on the lower part of the bridge body 402 through the bearing. The hydraulic rod 504 provides support force for the boarding bridge to prevent motor failure during the operation of the boarding bridge and provide support force for the boarding bridge to maintain the current state;

[0146] The actuator 505 is composed of a stepper motor and a ball screw; the motor controls the rotation speed of the motor by controlling the time interval of sending pulses; the ball screw has a reverse self-locking function, and when the boarding bridge is in the process of being retracted, once the electric cylinder is powered off, the boarding bridge will not fall down and cause damage to equipment and personnel; the actuator 505 is installed on the room body through a bearing; the output end of the actuator 505 is installed on the bridge body 402 through a bridge deck support seat 506;

[0147] The hardware installation sequence of the boarding bridge is as follows: 1. Install the bottom bracket 101 of the boarding bridge; 2. Install the columns 102, small connecting plate 105, large connecting plate 106, support legs 104, etc. of the boarding bridge; 3. Install each bearing 301 / 401 / 501, supporting tripod 502, limit switch 503, etc. to the corresponding positions; 4. Use the overhead crane to install the boarding bridge body 402 on the boarding bridge column platform 102 through the bearing; 5. Adjust the distance between the boarding bridge as a whole and the simulator, and fix the boarding bridge column platform 1 to the ground with chemical bolts; 6. Install the actuator 506, folding guardrail mechanism 3, emergency stop control box 110 and other components.

[0148] Reference Figure 6-Figure 15 The present invention provides a boarding bridge and control system for a flight simulator, the control system mainly consists of an electrical control cabinet 2, an actuator 505 and limit switches 503. All internal and external signals of the boarding bridge are processed and responded to by the program in the control cabinet;

[0149] The electrical control cabinet 2 is installed on the side of the column platform 1; the electrical control cabinet 2 is provided with a status indicator light and an emergency stop button on the outside; the status indicator lights include an ascending indicator light, an ascending position indicator light, a descending indicator light, and a descending position indicator light; the emergency stop button is a two-position push-button with a self-locking switch;

[0150] The electrical control cabinet contains PLC control program, circuit breaker, contactor, frequency converter, connector, button switch. The boarding bridge and motion platform have an interlocking function to protect the boarding bridge and motion platform in case of misoperation.

[0151] Reference Figure 7 The electrical control cabinet has a "manual / automatic" switch, "up", "down" and "fault clear" control button switches inside; the electrical control cabinet is locked and is not allowed to be opened at ordinary times to prevent accidental touch; the electrical control cabinet has only an "emergency stop" control button on the outside of the control cabinet, one on the control room, and one next to the three-color light of the corridor bridge; there are no other external control buttons outside the control cabinet to prevent human misoperation; in the electrical control cabinet, the PLC control program displays the operating status of the boarding bridge itself in real time through signal lights, including up, up to the position, down, and down to the position signals; the signal lights are grouped into four groups, and one group is installed inside the rear room of the simulator, on the instructor console under the machine, and on the electrical control cabinet; the three-color signal lights are installed on the instructor console on board, the instructor console under the machine, and the boarding bridge platform, respectively, to display the current operating status of the boarding bridge in real time;

[0152] The "manual / automatic" switch is used to switch the control mode of the boarding bridge. In the "manual" position, the boarding bridge can only be raised and lowered by the "up" and "down" buttons in the electrical control cabinet. In the "automatic" position, the boarding bridge can only be controlled by the motion platform. The "fault relief" button is used to restore the PLC control program. After a fault occurs, pressing this button can initialize the PLC control program and thus resolve the fault.

[0153] Reference Figure 8 In the above modes, in automatic mode, the logic for controlling the boarding bridge to rise is: the boarding bridge can only be controlled to rise when the motion platform is at the lowest position, the mode switch is in automatic state, the boarding bridge is safe, the boarding bridge is at the lower limit position, and all safety doors are closed. If any of the conditions are not met, the boarding bridge will not rise regardless of whether it receives the rising signal;

[0154] Reference Fig. 9 In the above modes, in automatic mode, the boarding bridge descent logic is: the boarding bridge can only be controlled to descend when the motion platform is at the lowest position, the mode switch is in automatic state, the boarding bridge is at the upper limit position, and all safety doors are closed. If any of the conditions are not met, the boarding bridge will not descend regardless of whether it receives a descent signal;

[0155] Reference Fig.10 In the above modes, in manual mode, the logic for controlling the boarding bridge to rise is: the boarding bridge can only be controlled to rise when the motion platform is at the lowest position, the mode switch is in manual state, the boarding bridge is safe, the boarding bridge is not at the upper limit position, and all safety doors are closed. If any of the conditions are not met, the boarding bridge will not rise regardless of whether it receives the rising signal;

[0156] Reference Fig.11 In the above modes, in manual mode, the boarding bridge descent logic is: the boarding bridge can only be controlled to descend when the motion platform is at the lowest position, the mode switch is in manual state, the boarding bridge is not at the lower limit position, and all safety doors are closed. If any of the conditions are not met, the boarding bridge will not descend regardless of whether it receives a descent signal;

[0157] Reference Fig.12 , which is a schematic diagram of the PLC control program of the boarding bridge provided by an embodiment of the present invention; the PLC control program schematic diagram is divided into an input part, an output part and a communication part;

[0158] The input terminals of the input part are connected with a plurality of input signals from field devices;

[0159] The input terminals X10.2, X10.2, and X10.4 are respectively the inputs of the up, down, and emergency stop buttons on the boarding bridge control cabinet, which are used to manually control the up, down, and emergency stop of the boarding bridge;

[0160] The input terminals X10.5 and X10.6 are respectively the upper and lower limit signals sent by the magnetic sensors installed at the top and bottom of the electric cylinder of the boarding bridge. When the electric cylinder reaches the top or the bottom, the magnetic sensor sends a corresponding limit signal, and the electric cylinder stops moving up or down.

[0161] The input terminal X10.7 is a remote emergency stop input signal installed on the boarding bridge, which is used to manually control the emergency stop of the boarding bridge;

[0162] The input terminals X10.8 and X11.1 are manual / automatic control input signals installed on the boarding bridge control cabinet, which are used to control the switching of the two modes;

[0163] The input terminal X11.2 is the fault confirmation button input signal on the boarding bridge control cabinet, which is used to eliminate the current boarding bridge fault status information;

[0164] The input terminals X11.3, X11.4, X11.6 and X11.7 are limit input signals of the mechanical travel switches at the ascending and descending positions of the boarding bridge, respectively, and are used to instruct the boarding bridge to move to the corresponding position;

[0165] The input terminal X11.8 is the interlock input signal of the safety light curtain, which is triggered when there is someone on the boarding bridge;

[0166] The input terminals X11.9 and X11.10 are the up / down dry contact input signals. When the boarding bridge is in automatic mode, the motion platform is connected to control the up / down of the boarding bridge;

[0167] The input terminal X11.14 is an emergency stop input signal installed inside the simulator room, and is used for emergency stop operation by personnel inside the simulator during training;

[0168] The input terminal X11.5 is the door feedback input signal of the simulator, and an input signal trigger is given when the simulator door is not closed;

[0169] The input terminal X11.6 is the lowest input signal, which is triggered when the boarding bridge reaches the lowest position;

[0170] The input terminal X11.7 is an alarm input signal. When a fault or alarm message occurs in the boarding bridge, the input signal is triggered and the boarding bridge performs corresponding control actions;

[0171] The output terminals are mainly used by the PLC to control the relevant actuators of the simulator boarding bridge through these output ports;

[0172] The output terminal X12.2 is the inverter power-on output signal, which is used to control the power supply of the inverter;

[0173] The output terminal X12.3 is the output signal of the three-color light buzzer, which is used to control the sounding of the three-color light buzzer;

[0174] The output terminal X12.5 is an automatic mode output signal. When the boarding bridge control cabinet is switched to "automatic mode", the boarding bridge outputs an automatic mode output signal to the motion platform;

[0175] The output terminals X12.7-X12.10 respectively output signals of the rising state indicator light, the descending state indicator light, the rising in-place state indicator light and the descending in-place indicator light of the boarding bridge status indicator light inside the simulator. When the boarding bridge is in different positions and states, the corresponding indicator lights up to remind the personnel inside the simulator of the current boarding bridge status;

[0176] The output terminal X13.2 is the motor brake control output signal. When a fault occurs or the emergency stop button is pressed, the motor brake control output signal is triggered, and the motor brakes to maintain the current position;

[0177] The output terminal X13.3 is a three-color red light output signal. When the boarding bridge fails or the emergency stop button is pressed, the three-color red light output signal is triggered, and the three-color red light lights up to indicate the current abnormal state;

[0178] The communication part uses RS485 communication interface to connect the communication ports A and B of PLC;

[0179] The communication interface is used to exchange data with external devices (such as inverters, host computers, HMI, etc.);

[0180] The RS485 is used to send control instructions from the PLC to the inverter, or to obtain status feedback from the inverter, providing a real-time control and monitoring platform for the entire system;

[0181] The workflow of the PLC control system is as follows:

[0182] (1) Signal input: Field sensors (magnetic sensors, limit switches, emergency stop buttons, etc.) feed back their status to the PLC, which determines the current system status based on this input information.

[0183] (2) Logic processing: The PLC performs logic processing based on a pre-written program to decide how to respond to input signals (such as starting a motor, stopping a motor, or triggering an alarm).

[0184] (3) Signal output: Based on the processing results, the PLC sends instructions to the actuator through the output terminals, such as controlling the inverter to adjust the motor speed, start or stop the brake, etc.

[0185] (4) Communication control: Through RS485, PLC can also monitor the operating status of the inverter in real time to ensure the smooth operation of the entire boarding bridge system.

[0186] Reference Fig.13 , which is the PLC control program input principle provided by the embodiment of the present invention Figure 1 ; The PLC input principle Figure 1 Mainly some key input signals, including S1, S2E, S3E, S4E, and S5;

[0187] The input signals are mostly feedback signals from push button switches or other devices, which are used to control the operation of the simulator boarding bridge;

[0188] The input signal S2E is an ascending button switch (NO, normally open contact) installed on the boarding bridge control cabinet; when the button is pressed, a control signal will be sent to the PLC (through a 24V voltage) to tell the system to start the ascending operation. This button is used to start the ascending movement of the boarding bridge under manual mode control;

[0189] The input signal S3E is a descending button switch (NO, normally open contact) installed on the boarding bridge control cabinet; when the button is pressed, the system receives a signal, and the button is used to control the descending operation of the boarding bridge under manual mode control;

[0190] The input signal S1 is an emergency stop button installed on the boarding bridge control cabinet, which is a normally closed contact (NC); the button is disconnected to stop the system operation, and its main function is to quickly stop the movement of the boarding bridge in an emergency;

[0191] The input signal S4E is a fault confirmation button installed on the boarding bridge control cabinet, which is used to manually reset or confirm the problem when a system fault occurs; after the button is pressed, a signal will be transmitted to the PLC, indicating that the fault has been confirmed and the system enters normal operation;

[0192] The input signal S5 is a mode switch (NO, normally open contact) installed on the boarding bridge control cabinet, which is used to switch the working mode of the system; the switch is used to switch the manual mode and automatic mode of the boarding bridge. After switching, the signal is transmitted to the PLC to determine the working state of the system;

[0193] Reference Fig.14 , which is the PLC control program input principle provided by the embodiment of the present invention Figure 2 ; The PLC input principle Figure 2 The upper and lower mechanical limit sensors of the boarding bridge and the deceleration input control signals on the electric cylinder are displayed; the limit sensors include SQ1, SQ2, SQ4, SQ5, SQ6, and SQ7;

[0194] The limit sensors SQ1 and SQ4 are upper limit switches, which are installed inside and behind the supporting tripods 502 on the left and right sides of the boarding bridge. When the boarding bridge reaches the upper limit, the switch is triggered;

[0195] The limit sensors SQ2 and SQ5 are lower limit switches, which are installed in front of the support tripods 502 on the left and right sides of the boarding bridge. When the boarding bridge reaches the lower limit, the switch is triggered;

[0196] The limit sensors SQ6 and SQ7 are deceleration limit switches of the electric push rods of the boarding bridge; the SQ6 and SQ7 switches are installed in the middle position inside the supporting tripod 502;

[0197] In the "automatic" mode, the boarding bridge rises at 30% of the full speed, passes the upper mechanical limit 2 (SQ4), and the speed is switched to 90% of the full speed. When it reaches the magnetic induction deceleration limit SQ6, the speed is switched to 20% of the full speed. In any mode, it rises to the mechanical limit 1 (SQ1) and stops.

[0198] In the "automatic" mode, the boarding bridge descends at 30% of the full speed, passes the lower mechanical limit 2 (SQ5), and the speed is switched to 90% of the full speed. When it reaches the magnetic induction deceleration limit SQ7, the speed is switched to 20% of the full speed. In any mode, it descends to the mechanical limit 1 (SQ2) and stops.

[0199] Reference Fig.15 , which is a PLC control program output schematic diagram provided by an embodiment of the present invention; the PLC output schematic diagram includes output signals of multiple relays KA1~KA7, KA9~KA10, which are responsible for controlling the operation of various devices;

[0200] The output signal KA1 is used to control the buzzer of the tricolor lamp; the KA1 controls its state through the PLC output signal for status alarm;

[0201] The output signal KA2 is used to control the red light of the three-color indicator light to display the equipment failure or warning status;

[0202] The output signal KA3 is used to control the output of the automatic mode, indicating that the equipment is in automatic operation state, and the boarding bridge is connected to the motion platform for automatic control;

[0203] The output signal KA4 is used to control the upward movement of the boarding bridge, and the output signal is used to control the extension of the electric cylinder to raise the boarding bridge;

[0204] The output signal KA5 is used to control the descending movement of the boarding bridge, and the output signal drives the electric cylinder to shorten to lower the boarding bridge;

[0205] The output signal KA6 is used to control the status indicator light inside the simulator room to light up, indicating that the device has reached the set rising position;

[0206] The output signal KA7 is used to control the status indicator light inside the simulator room to light up, indicating that the device has reached the set descending position;

[0207] The output signal KA9 is used to control the power supply of the frequency converter, and start or stop the power supply of the frequency converter;

[0208] The output signal KA10 is used to control the brake of the motor, and is usually used for emergency stop or keeping the motor stopped.

[0209] The above output signals are responsible for controlling the operating status, alarm indication and feedback signal of the equipment through relays; the output signals corresponding to the relays are connected to the corresponding execution devices, such as lights, buzzers, motors, inverters, etc.

[0210] The above embodiments are preferred implementation modes of the present invention and are only used to facilitate the description of the present invention. They are not intended to limit the present invention in any form. Any person with ordinary knowledge in the relevant technical field, if they do not depart from the scope of the technical features of the present invention, can make equivalent embodiments by partial changes or modifications to the technical contents disclosed in the present invention, and they still fall within the scope of the technical features of the present invention without departing from the technical features of the present invention.

Claims

1. A boarding bridge and control system for a flight simulator, wherein the boarding bridge structure comprises a boarding bridge platform, a control cabinet, a folding guardrail mechanism, a bridge structure, and a detection device; the boarding bridge control system comprises an electrical control cabinet, an actuator, and various limit switches, and is characterized in that: The boarding bridge platform includes bottom bracket, column, control cabinet mounting frame, support leg, connecting plate, platform, platform guardrail, control box, warning light. The components of the boarding bridge platform are assembled by bolts to provide a stable and reliable mechanical structure for the boarding bridge. The folding guardrail mechanism includes a connecting rod mechanism, including a small bearing seat, a connecting rod, a connecting piece, a short connecting rod, and a long connecting rod. It uses the principle of parallel sides of a parallelogram and a fully mechanical hardware mechanism to achieve automatic folding and unfolding of the boarding guardrail. The bridge structure includes a central bearing seat, a bridge body, a bridge deck, and a grating sensor, providing a walking passage for personnel; The detection device includes a large bearing seat, a supporting tripod, a limit switch, a hydraulic rod, an actuator, and a bridge deck support seat, and is mainly used to provide installation, detection, and signal collection for the retraction / release movement of the boarding bridge; The electrical control cabinet contains PLC controllers, circuit breakers, contactors, frequency converters, connectors, and push button switches, which are used to provide internal and external signal acquisition, logic processing and other functions for the boarding bridge.

2. A boarding bridge and control system for a flight simulator according to claim 1, characterized in that The bottom bracket and columns are all assembled from I-beams or U-shaped steels by bolts. The length of the bottom bracket can be adaptively changed or removed according to the width of the trench below; the control cabinet mounting frame is folded into a U shape from sheet metal, and all mounting holes on the control cabinet mounting frame are designed as waist-shaped holes.

3. The boarding bridge and control system of a flight simulator according to claim 1, characterized in that There are two support legs, which are welded by U-shaped steel or I-shaped steel, and the support legs are fixed to two of the columns by bolts. The place where the support legs contact the ground is fixed to the ground by chemical bolts; the motor mounting seat is installed on the column by bolts from U-shaped steel, and the side of the motor mounting seat is provided with a motor mounting hole, including at least one positioning hole, and the mounting surface of the motor mounting seat is 90° with the electric cylinder actuator, so that the force of the electric cylinder actuation is vertically transmitted to the electric cylinder support seat.

4. The boarding bridge and control system of a flight simulator according to claim 1, characterized in that The small bearing seat is installed on the side of the above-mentioned column and is installed together with the connecting piece through a connecting rod; a shaft is installed at the bottom of the short connecting rod and is connected to the bearing on the side of the bridge body. When the boarding bridge is raised, the short connecting rod and the long connecting rod are folded under the pull of the connecting rod; when the boarding bridge is lowered, the short connecting rod is pushed by the connecting rod, and the short connecting rod and the long connecting rod are stretched out; the short connecting rod and the long connecting rod are connected by a pin structure, and anti-wear pads are added on both sides.

5. The boarding bridge and control system of a flight simulator according to claim 1, characterized in that The interior of the upper part of the supporting tripod is a hollow structure, and a limit switch is installed; the supporting tripod is made of steel to ensure the structural safety of the tripod, and the mounting hole of the supporting tripod is a waist-shaped hole, which is convenient for adjusting the height when installed on the column, thereby adjusting the horizontality of the boarding bridge deck.

6. The boarding bridge and control system of a flight simulator according to claim 1, characterized in that There are a total of 6 limit switches, including 2 upper limit switches, 2 lower limit switches, 1 upper limit speed change switch, and 1 lower limit speed change switch; there are 2 upper limit switches and 2 lower limit switches, which are redundant designs to prevent the limit switches from being damaged and signals from not being sent out, thereby causing damage to the boarding bridge structure; there is 1 upper limit speed change switch and 1 lower limit speed change switch, whose main function is to send speed change signals to the motor for acceleration and deceleration functions during the operation of the boarding bridge, thereby reducing the operating time of the boarding bridge.

7. The boarding bridge and control system of a flight simulator according to claim 1, characterized in that The electrical control cabinet has a "manual / automatic" mode switch, "up", "down" and "fault clearing" control button switches. The only external button of the electrical control cabinet is the "emergency stop" control button, which is installed one on the outside of the control cabinet, in the control room, and next to the three-color lights of the corridor bridge. The PLC control program of the boarding bridge in the electrical control cabinet displays the operating status of the boarding bridge itself in real time through signal lights, including up, up to the position, down, and down to the position signals; the signal lights are grouped into four groups, and one group is installed in the rear room of the simulator, on the instructor console under the machine, and on the electrical control cabinet; the three-color signal lights are installed one on the instructor console on the machine, the instructor console under the machine, and the boarding bridge platform, respectively, to display the current operating status of the boarding bridge in real time.

8. The boarding bridge and control system of a flight simulator according to claim 7, characterized in that The boarding bridge controller PLC receives the door limit inside the simulator, the safety light curtain of the boarding bridge itself, the upper limit of the boarding bridge, and the lower limit of the boarding bridge in real time; the boarding bridge controller PLC and the motion platform control cabinet transmit signals through dry contacts, each dry contact is normally open, and there are 9 signals in total; the boarding bridge controller PLC sends a total of 5 signals to the motion platform control cabinet. They are "manual / automatic" mode, upper limit, lower limit, door limit, and safety light curtain signals; the motion platform controller sends a total of 4 signals to the boarding bridge controller PLC, which are rising, falling, alarm, and lowest position signals; the operating mode of the boarding bridge controller PLC is determined by the mode switching switch inside the control cabinet; no matter in any mode, if the lowest position signal of the motion platform controller is lost, the boarding bridge stops moving, and the boarding bridge signal light turns red.

9. The boarding bridge and control system of a flight simulator according to claim 7, characterized in that In automatic mode, the boarding bridge can be controlled to rise only when the motion platform is at the lowest position, the mode switch is in automatic state, the boarding bridge is safe, the boarding bridge is at the lower limit, and the safety doors are all closed. If any of the conditions are not met, the boarding bridge will not rise regardless of whether it receives the rising signal; in "automatic" mode, the boarding bridge rises at 30% of the full speed, passes the upper mechanical limit 2 (SQ4), the speed is switched to 90% of the full speed, reaches the magnetic induction deceleration limit SQ6, the speed is switched to 20% of the full speed, rises to the mechanical limit 1 (SQ1), and stops.

10. The boarding bridge and control system of a flight simulator according to claim 7, characterized in that In automatic mode, the boarding bridge can be controlled to descend only when the motion platform is at the lowest position, the mode switch is in automatic state, the boarding bridge is at the upper limit, and all the safety doors are closed. If any of the conditions are not met, the boarding bridge will not descend regardless of whether it receives a descending signal; in "automatic" mode, the boarding bridge descends at 30% of the full speed, passes the lower mechanical limit 2 (SQ5), and the speed is switched to 90% of the full speed. When it reaches the magnetic induction deceleration limit SQ7, the speed is switched to 20% of the full speed, and the descent reaches the mechanical limit 1 (SQ2), and the action stops.

11. The boarding bridge and control system of a flight simulator according to claim 7, characterized in that In manual mode, the boarding bridge can only be controlled to rise when the motion platform is at the lowest position, the mode switch is in manual state, the boarding bridge is safe, the boarding bridge is not at the upper limit position, and all safety doors are closed. If any of the conditions are not met, the boarding bridge will not rise regardless of whether it receives the rising signal.

12. The boarding bridge and control system of a flight simulator according to claim 7, characterized in that In manual mode, the boarding bridge can be controlled to descend only when the motion platform is at the lowest position, the mode switch is in manual state, the boarding bridge is not at the lower limit position, and all safety doors are closed. If any of the conditions are not met, the boarding bridge will not descend regardless of whether it receives a descending signal.

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