Boarding ladder passenger protection system and setting method thereof

Abstract

The invention provides an airlift passenger protection system and a setting method thereof. The system comprises a base, a passenger lift, a safety grating assembly, a safety controller and a shielding sensor. The passenger elevator is arranged on the base and comprises a first passenger elevator body and a second passenger elevator body which are connected in a sliding mode, the first passenger elevator body and the second passenger elevator body each comprise a step ladder body and chord plates arranged on the two sides of the step ladder body, and the step ladder body of the second passenger elevator body is wider than the step ladder body of the first passenger elevator body. The safety grating assembly comprises a light projector and a light receiver, the light projector is arranged on the inner side of a chord plate on one side of a step ladder of the first passenger elevator and the second passenger elevator, and the light receiver is arranged on the inner side of a chord plate on the other side of the step ladder of the first passenger elevator and the second passenger elevator. The safety controller is arranged on the base and controls movement of the base and / or the passenger elevator according to detection signals of the safety grating assembly. The shielding sensor is arranged on the outer side of a chord plate, close to the light projector on the second passenger elevator, of the first passenger elevator. According to the invention, reliable full-coverage safety detection of the passenger activity area on the airstairs can be realized with low cost.

Description

Technical Field

[0001] The present invention relates to the technical field of special vehicles for airports, and in particular to a passenger protection system for an airstaircase and a setting method thereof. Background Art

[0002] When a passenger plane is not docked at an airport jet bridge, a passenger elevator is required to assist passengers in boarding or disembarking. The elevator driver generally confirms whether the passengers have left by direct visual observation or by using monitoring equipment, and only operates the elevator to perform subsequent actions after all passengers have left the elevator.

[0003] With the development of intelligent civil aviation equipment and unmanned airports, the civil aviation industry's demand for intelligent passenger elevators is also increasing. However, with the development of unmanned passenger elevators, cameras or sensors with limited coverage cannot reliably identify the presence of passengers and items on passenger elevators in various weather conditions, lighting conditions, and vehicle conditions. Therefore, there is an urgent need for a passenger elevator protection system that can provide comprehensive and reliable detection of passenger activity areas. Summary of the Invention

[0004] The object of the present invention is to provide a passenger protection system for a boarding staircase and a method for setting it up, so as to solve the problem that the above-mentioned passenger protection devices on the boarding staircase do not exist or have imperfect ones, and to achieve reliable full-coverage safety detection of the passenger activity area on the boarding staircase at a relatively low cost.

[0005] The present invention proposes a passenger protection system for an airstaircase, comprising:

[0006] base;

[0007] A passenger elevator is provided on a base and includes a first passenger elevator and a second passenger elevator in sliding connection, wherein the first passenger elevator and the second passenger elevator respectively include steps and chord plates provided on both sides of the steps, and the steps of the second passenger elevator are wider than the steps of the first passenger elevator;

[0008] The safety light curtain assembly includes a light projector and a light receiver. The light projector is arranged on the inner side of the chord plate on one side of the steps of the first and second passenger elevators, and the light receiver is arranged on the inner side of the chord plate on the other side of the steps of the first and second passenger elevators. The position of the light receiver corresponds to the position of the light projector. The light projector is used to project light, and the light receiver is used to receive the light projected by the light projector.

[0009] A safety controller is provided on the base and connected to the safety grating assembly, and controls the movement of the base and / or the passenger elevator according to the detection signal of the safety grating assembly, and restricts the movement of the base and / or the passenger elevator when the safety grating assembly detects an object blocking the light.

[0010] The shielding sensor is arranged on the outside of the string plate of the first passenger elevator near the projector on the second passenger elevator. The number and position of the shielding sensors on the first passenger elevator correspond to the number and position of the projectors on the second passenger elevator. The shielding sensor is used to shield the detection signal of the corresponding safety grating assembly from being transmitted to the safety controller.

[0011] In one embodiment, the installation position of the muting sensor on the first passenger elevator closest to the second passenger elevator ensures that the muting sensor on the first passenger elevator closest to the second passenger elevator is not triggered by the chord plate of the second passenger elevator when the second passenger elevator and the first passenger elevator are deployed to the maximum position.

[0012] In one embodiment, a platform is horizontally provided at the upper end of the passenger elevator, and the platform includes a walking platform and chord plates provided on both sides of the walking platform;

[0013] A light projector is provided on the inner side of the string plate on one side of the walking platform, and a light receiver is provided on the inner side of the string plate on the other side, and the position of the light receiver corresponds to the position of the light projector.

[0014] In one embodiment, the platform includes a fixed platform and a movable platform, each including a walking platform and chord plates arranged on both sides of the walking platform. One end of the fixed platform is connected to the upper end of the passenger elevator, and the other end is slidably connected to the movable platform. The walking platform of the movable platform is wider than the walking platform of the fixed platform.

[0015] A projector is provided on the inner side of the chord plate on one side of the walking platform of the fixed platform and the movable platform, and a light receiver is provided on the inner side of the chord plate on the other side of the walking platform of the fixed platform and the movable platform. A shielding sensor is provided on the outer side of the chord plate of the fixed platform close to the projector on the movable platform. The number and position of the shielding sensors on the fixed platform correspond to the number and position of the projectors on the movable platform. The shielding sensor is used to shield the detection signal of the corresponding safety grating component from being transmitted to the safety controller. The installation position of the shielding sensor on the fixed platform closest to the movable platform ensures that the shielding sensor on the fixed platform closest to the movable platform is not triggered by the chord plate of the movable platform when the movable platform and the fixed platform are unfolded to the maximum position.

[0016] In one embodiment,

[0017] The outer sides of the chord plates on both sides of the first passenger elevator are provided with slide rails, and the inner sides of the chord plates on both sides of the second passenger elevator are provided with sliders. The second passenger elevator slides on the slide rails through the sliders and is slidably connected to the first passenger elevator.

[0018] The outer sides of the chord plates on both sides of the walking platform of the fixed platform are provided with slide rails, and the inner sides of the chord plates on both sides of the walking platform of the movable platform are provided with sliders. The movable platform slides on the slide rails through the sliders and is slidably connected to the fixed platform.

[0019] In one embodiment,

[0020] The light projector, light receiver, shielding sensor on the first passenger elevator and the light projector and light receiver on the second passenger elevator are arranged in a direction parallel to the upper slide rail of the first passenger elevator;

[0021] The light projector, the light receiver, the shielding sensor on the fixed platform and the light projector and the light receiver on the movable platform are all arranged in a direction parallel to the slide rail on the fixed platform.

[0022] In one embodiment, the passenger protection system for the boarding ladder further includes a travel controller and an upper loading controller disposed on the base and connected to the safety controller;

[0023] The travel controller controls the movement of the base according to the instructions of the safety controller;

[0024] The upper structure controller controls the movement of the passenger elevator and platform according to the instructions of the safety controller.

[0025] The present invention also proposes a method for setting up a passenger protection system for an airstaircase, comprising the following steps:

[0026] Determining the position of the muting sensor on the first passenger elevator closest to the second passenger elevator or the muting sensor on the fixed platform closest to the movable platform when deployed to the maximum distance based on the sliding speed of the second passenger elevator relative to the first passenger elevator or the sliding speed of the movable platform relative to the fixed platform, and the maximum sensing radius of the muting sensor;

[0027] Determine the maximum segment length of the light projector and the light receiver on the passenger elevator or the platform based on the sliding speed of the second passenger elevator relative to the first passenger elevator or the sliding speed of the movable platform relative to the fixed platform, the maximum delay time of the safety light grid, and the maximum delay time of the safety controller;

[0028] Determine the actual number of segments and actual segment length of the light emitters and light receivers on the passenger elevator or platform based on the maximum segment length and maximum setting length of the light emitters and light receivers on the passenger elevator or platform;

[0029] Determine the installation positions of the light emitters and light receivers on the passenger elevator or platform based on the actual number of segments and actual segment lengths of the light emitters and light receivers on the passenger elevator or platform;

[0030] The position of the muting sensor is set based on the position of the projector.

[0031] In one embodiment, the calculation formula for the position of the muting sensor on the first passenger elevator closest to the second passenger elevator or the muting sensor on the fixed platform closest to the movable platform when deployed to the maximum distance is:

[0032] Lb1'=kb(b-tp1 v1);

[0033] Wherein, Lb1' is the distance from the sensing center point of the shielding sensor closest to the second passenger elevator on the first passenger elevator when deployed to the maximum distance to the second passenger elevator chord plate, or the distance from the sensing center point of the shielding sensor closest to the movable platform on the fixed platform when deployed to the maximum distance to the movable platform chord plate, kb is the first redundancy coefficient, b is the maximum sensing radius of the shielding sensor, tp1 is the signal delay time of the shielding sensor, and v1 is the sliding speed of the second passenger elevator relative to the first passenger elevator or the sliding speed of the movable platform relative to the fixed platform.

[0034] In one embodiment, the maximum segment length of the light projector and light receiver on the passenger elevator or platform is calculated as follows:

[0035] L1'=v1 (t1-ta-tb);

[0036] Among them, L1' is the maximum segment length of the projector and the light receiver, t1 is the theoretical maximum acceptable time for the shielded safety grating to be exposed, ta is the maximum delay time of the safety grating, and tb is the maximum delay time of the safety controller;

[0037] The formula for calculating the actual number of segments of emitters and receivers on a passenger elevator or platform is:

[0038] P'=P+1, P=Lm1' / L1'rounded down, Lm1'=Lm1-(kc Ln1);

[0039] Wherein, P' is the actual number of segments of the projector and the light receiver, Lm1 is the maximum setting length of the projector and the light receiver, Lm1' represents the actual maximum setting length of the projector and the light receiver, kc is the second redundancy coefficient, and Ln1 is the minimum distance between the projector and the light receiver closest to the end of the string plate and the end of the string plate;

[0040] The calculation formula for the actual segment length of the projector and receiver on the passenger elevator or platform is: L1''=Lm1' / P'.

[0041] Compared with the prior art, the passenger protection system for boarding stairs and the method for setting the same have the following advantages:

[0042] 1) The present invention can achieve all-round monitoring of the passenger activity space of the boarding elevator by deploying a full-coverage safety grating assembly in the passenger passage area, ensuring that the boarding elevator passenger protection system has no blind spots.

[0043] 2) By providing segmented safety gratings and shielding switches, the present invention ensures that the entire system can continue to operate normally during dynamic operations such as the extension and retraction of the loading mechanism on the boarding ladder. There is no false triggering due to mechanism movement, and no detection failure. The operation is reliable and the logic is simple.

[0044] 3) This invention can improve operational efficiency through streamlined logic design while ensuring system reliability, effectively balancing safety and operational continuity, and providing key technical support for the intelligent upgrade of boarding stairs. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a schematic diagram of a fully deployed state of an airstair passenger protection system according to an embodiment of the present invention;

[0046] Figure 2 A fully expanded cross-sectional view of an airstair passenger protection system according to an embodiment of the present invention;

[0047] Figure 3 This is a schematic diagram of a fully retracted state of an airstair passenger protection system according to an embodiment of the present invention;

[0048] Figure 4 FIG. 1 is a schematic diagram of parameters of a shielding sensor according to an embodiment of the present invention.

[0049] Reference numerals

[0050] 1. Safety light curtain assembly; 2. Upper part; 3. Base; 4. Safety controller; 5. Upper part controller; 6. Travel controller; 71. First shielding sensor; 72. Second shielding sensor; 8. Platform slide rail; 9. Slider; 10. Lower ladder slide rail; 101. First projector; 102. First light receiver; 103. Second projector; 104. Second light receiver; 106. Third projector; 107. Third light receiver; 108. Fourth projector; 109. Fourth light receiver; 21. Lower ladder; 211. First chord plate; 212. Lower ladder steps; 22. Upper ladder; 221. Second chord plate; 222. Upper ladder steps; 23. Fixed platform; 231. Third chord plate; 232. First walking platform; 24. Movable platform; 241. Fourth chord plate; 242. Second walking platform. DETAILED DESCRIPTION

[0051] In order to make the objectives, technical solutions and advantages of the present invention more understandable, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0052] Next, the present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention, for ease of illustration, cross-sectional views illustrating device structures may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0053] Furthermore, the phrases "one embodiment" or "an embodiment" in this application refer to specific features, structures, or characteristics that may be included in at least one implementation of the present invention. The phrases "in one embodiment" or "an embodiment" appearing in different places in this specification do not necessarily refer to the same embodiment, nor do they refer to separate or selective embodiments that are mutually exclusive with other embodiments. The terms "including" and "comprising" indicate the presence of the claimed features, but do not exclude the presence of one or more other features. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0054] The present invention provides a passenger protection system for an airlift, comprising a base, an airlift, a safety light curtain assembly, and a safety controller. The airlift, mounted on the base and used for passengers to descend from the cabin to the ground, comprises a staircase and chord plates arranged on either side of the staircase. The safety light curtain assembly comprises a light projector and a light receiver. The light projector is positioned on the inner side of the chord plate on one side of the airlift, while the light receiver is positioned on the inner side of the chord plate on the other side of the airlift. The position of the light receiver corresponds to the position of the light projector; the light projector projects light, while the light receiver receives the light projected by the light projector. The safety controller, mounted on the base and connected to the safety light curtain assembly, controls the movement of the base and / or airlift based on detection signals from the safety light curtain assembly. If the safety light curtain assembly detects an obstruction, i.e., if the light receiver cannot receive the light projected by the light projector, the movement of the base and / or airlift is restricted. If the airlift is clear, the light receiver can receive the light projected by the light projector, and the safety controller releases the restrictions on the base and airlift, thereby preventing passenger injury or debris from being caught in the airlift. In the present invention, the inner side refers to the side facing the stairs, that is, the side facing the passengers; the opposite side is the outer side.

[0055] Typically, a passenger ladder is located at one end of the base, a driver's cab is located at the other end, and wheels are located underneath the base, forming a boarding ladder system. The wheels are used to drive the boarding ladder system.

[0056] A passenger elevator according to one embodiment of the present invention includes a first and second slidably connected elevator to accommodate passengers of varying heights disembarking from an aircraft. The first and second elevators each include a step and a chord plate disposed on either side of the step, with the second elevator's step being wider than the first. Light projectors are located on the inner side of the chord plates on one side of each step, while light receivers are located on the inner side of the chord plates on the other side of each step. Shielding sensors are located on the outer side of the chord plates of the first elevator, near the light projectors on the second elevator. The number and location of the shielding sensors on the first elevator correspond to the number and location of the light projectors on the second elevator. The shielding sensors are configured to shield detection signals from corresponding safety light curtain assemblies from being transmitted to a safety controller, thereby deactivating the safety light curtain assemblies on the second elevator that are retracted into the first elevator. The shielding sensors on the first elevator closest to the second elevator are positioned so that they are not triggered by the chord plates of the second elevator when the second elevator is fully extended relative to the first elevator.

[0057] As the second passenger elevator slides over the first, the relative relationship between the projector and the light receiver on the first passenger elevator remains unchanged. As the second elevator slides, the projector and light receiver on the second passenger elevator are gradually blocked by the chord plate of the first passenger elevator. During this process, the shielding sensors on the first passenger elevator are sequentially triggered by the chord plate of the second passenger elevator. Each time a shielding sensor is triggered, the safety controller shields the corresponding safety grating assembly, thereby preventing the safety grating assembly on the second passenger elevator from being accidentally triggered by the chord plate of the first passenger elevator. It should be noted that each shielding sensor is always triggered before its corresponding safety grating assembly on the second passenger elevator is blocked by the chord plate of the first passenger elevator. In the absence of passengers or obstacles, the projector on the second passenger elevator will not trigger a detection signal, regardless of how the second passenger elevator moves. When a passenger or obstacle is present within the unblocked range of the projector on the second passenger elevator, the safety grating assembly on the second passenger elevator generates a trigger signal, instructing the safety controller to take subsequent action.

[0058] When the second passenger elevator slides to completely cover the first passenger elevator, the relative relationship between the projector and the light receiver on the first passenger elevator remains unchanged, and the shielding sensors on the first passenger elevator are triggered by the string plate of the second passenger elevator. At this time, the detection signals of the projector and the light receiver on the second passenger elevator are all shielded.

[0059] Of course, the steps of the first passenger elevator can also be arranged to be wider than those of the second passenger elevator. In this case, the shielding sensor needs to be arranged outside the string plate of the second passenger elevator close to the light projector on the first passenger elevator.

[0060] A passenger elevator according to one embodiment of the present invention has a horizontal platform at its upper end for passengers to exit the cabin. The platform includes a walking platform and chord plates disposed on either side of the walking platform. A light projector is disposed on the inner side of the chord plate on one side of the walking platform, while a light receiver is disposed on the inner side of the chord plate on the other side. The position of the light receiver corresponds to that of the light projector.

[0061] A platform according to one embodiment of the present invention includes a fixed platform and a movable platform, each including a walking platform and chord plates arranged on both sides of the walking platform. One end of the fixed platform is connected to the upper end of the passenger elevator, and the other end is slidably connected to the movable platform. The walking platform of the movable platform is wider than the walking platform of the fixed platform. A projector is provided on the inner side of the chord plates on one side of the walking platform of the fixed platform and the movable platform, and a light receiver is provided on the inner side of the chord plates on the other side of the walking platform of the fixed platform and the movable platform. Shielding sensors are provided on the outer side of the chord plates of the fixed platform near the projectors on the movable platform. The number and position of the shielding sensors on the fixed platform correspond to the number and position of the projectors on the movable platform. The shielding sensors are used to shield the detection signals of the corresponding safety grating assemblies from being transmitted to the safety controller, thereby ensuring that the safety grating assemblies on the movable platform that retract into the fixed platform stop working. The installation position of the shielding sensor on the fixed platform closest to the movable platform ensures that the shielding sensor on the fixed platform closest to the movable platform is not triggered by the chord plates of the movable platform when the movable platform and the fixed platform are extended to their maximum position.

[0062] As the movable platform slides over the fixed platform, the relative relationship between the light projector and the light receiver on the fixed platform remains unchanged. As the movable platform slides, the light projector and the light receiver on the movable platform are gradually blocked by the chord plate of the fixed platform. During this process, the shielding sensors on the fixed platform are triggered in sequence by the chord plate of the movable platform. Each time a shielding sensor is triggered, the safety controller blocks the corresponding safety grating assembly in sequence, thereby preventing the safety grating assembly on the movable platform from being mistakenly triggered by the chord plate of the fixed platform. It should be noted that each shielding sensor is always triggered before the safety grating assembly on its corresponding movable platform is blocked by the chord plate of the fixed platform. In the absence of passengers or obstacles, no matter how the movable platform moves, the light projector on the movable platform will not trigger a detection signal. When a passenger or obstacle is present within the range where the light projector on the movable platform is not blocked, the safety grating assembly on the movable platform generates a trigger signal, causing the safety controller to take subsequent actions.

[0063] When the movable platform slides to completely cover the fixed platform, the relative relationship between the projector and the light receiver on the fixed platform remains unchanged, and the shielding sensors on the fixed platform are triggered by the string plate of the movable platform. At this time, the detection signals of the projector and the light receiver on the movable platform are shielded.

[0064] Of course, it can also be arranged that the walking platform of the fixed platform is wider than the walking platform of the movable platform. In this case, the shielding sensor needs to be arranged outside the string plate of the movable platform close to the projector on the fixed platform.

[0065] In one embodiment of the present invention, the outer sides of the chord plates on both sides of the first passenger elevator are provided with slide rails, and the inner sides of the chord plates on both sides of the second passenger elevator are provided with sliders. The second passenger elevator slides on the slide rails through the sliders and is slidably connected to the first passenger elevator.

[0066] In one embodiment of the present invention, slide rails are provided on the outer sides of the chord plates on both sides of the walking platform of the fixed platform, and sliders are provided on the inner sides of the chord plates on both sides of the walking platform of the movable platform. The movable platform slides on the slide rails through the sliders and is slidably connected to the fixed platform.

[0067] In one embodiment of the present invention, the light projector, light receiver, and shielding sensor on the first passenger elevator and the light projector and light receiver on the second passenger elevator are arranged in a direction parallel to the slide rail on the first passenger elevator and extend continuously to both ends of the chord plate.

[0068] In one embodiment of the present invention, the light projector, light receiver, shielding sensor on the fixed platform and the light projector and light receiver on the movable platform are arranged in a direction parallel to the slide rail on the fixed platform and continuously extend to both ends of the chord plate.

[0069] The passenger protection system for an airlift according to one embodiment of the present invention further includes a travel controller and an upper body controller disposed on a base and connected to a safety controller. The travel controller controls the movement of the base according to instructions from the safety controller. The upper body controller controls the movement of the passenger lift and platform, such as the sliding movement between the first and second passenger lifts and the sliding movement of the movable platform, according to instructions from the safety controller. Of course, the travel controller and upper body controller can be two independent controllers or a unified hardware component. Alternatively, the travel controller, upper body controller, and safety controller can be integrated into a single hardware component.

[0070] The following is a detailed description of the passenger protection system for the boarding ladder of the present invention through a preferred embodiment. Figure 1 、 Figure 2 、 Figure 3 .

[0071] In this embodiment, the passenger protection system for the boarding ladder includes a safety grating assembly 1 and a boarding ladder. The boarding ladder includes a top 2 and a base 3, with the top 2 being disposed above the base 3. The top 2 includes a lower ladder 21, an upper ladder 22, a fixed platform 23, and a movable platform 24. The lower ladder 21 includes a lower step 212 and a first chord plate 211, with the first chord plate 211 being disposed on both sides of the lower step 212. The upper ladder 22 includes an upper step 222 and a second chord plate 221, with the second chord plate 221 being disposed on both sides of the upper step 222. The fixed platform 23 includes a first walking platform 232 and a third chord plate 231, with the third chord plate 231 being disposed on both sides of the first walking platform 232. The movable platform 24 includes a second walking platform 242 and a fourth chord plate 241, with the fourth chord plate 241 being disposed on both sides of the second walking platform 242. The safety grating assembly 1 is arranged on the inner and outer sides of the first chord plate 211 and the third chord plate 231 and on the inner sides of the second chord plate 221 and the fourth chord plate 241 .

[0072] The width of the upper ladder 22 is greater than that of the lower ladder 21, so the spacing between the second chord plates 221 is greater than the spacing between the first chord plates 211. A lower ladder slide rail 10 is provided on the outside of the lower ladder 21, and a slider 9 is provided on the inside of the upper ladder 22. The upper ladder 22 can slide along the lower ladder slide rail 10, and the bottom of the lower ladder 21 is connected to the base 3. The width of the movable platform 24 is greater than that of the fixed platform 23, so the spacing between the fourth chord plates 241 is greater than the spacing between the third chord plates 231. A platform slide rail 8 is provided on the outside of the third chord plate 231, and a slider 9 is provided on the inside of the fourth chord plate 241. The fourth chord plate 241 can move along the third chord plate 231 via the platform slide rail 8 and the slider 9. One end of the fixed platform 23 is fixed to the uppermost end of the upper ladder 22, and the movable platform 24 is connected to the other end of the fixed platform 23.

[0073] The safety light curtain assembly 1 includes a first light projector 101 , a first light receiver 102 , a second light projector 103 , a second light receiver 104 , a third light projector 106 , a third light receiver 107 , a fourth light projector 108 and a fourth light receiver 109 .

[0074] The first light projector 101 is mounted on one side of the inner side of the first chord plate 211, and the first light receiver 102 is mounted on the other side of the inner side of the first chord plate 211, corresponding to the first light projector 101. The first light projector 101 and the first light receiver 102 are arranged parallel to the lower ladder rail 10 and extend continuously to both ends of the first chord plate 211.

[0075] The second light projector 103 is mounted on one side of the inner side of the second chord plate 221, and the second light receiver 104 is mounted on the other side of the inner side of the second chord plate 221, corresponding to the second light projector 103. A first shielding sensor 71 is also mounted on one side of the outer side of the first chord plate 211 (preferably, the first shielding sensor 71 is mounted on the outer side of the first chord plate 211 on the side closest to the second light projector 103). The second light projector 103, the second light receiver 104, and the first shielding sensor 71 are parallel to the lower ladder rail 10. The second light projector 103 and the second light receiver 104 extend continuously to both ends of the second chord plate 221. The second light projector 103 and the second light receiver 104 are arranged in sections at intervals of a first distance. The first shielding sensors 71 are distributed at the same intervals as the first intervals and are present in the same number of sections as the second light projectors 103.

[0076] The third light projector 106 is mounted on one side of the inner side of the third chord plate 231, and the third light receiver 107 is mounted on the other side of the inner side of the third chord plate 231, corresponding to the position of the third light projector 106. The third light projector 106 and the third light receiver 107 are parallel to the platform slide rail 8 and extend continuously to both ends of the third chord plate 231.

[0077] The fourth light projector 108 is mounted on one side of the inner side of the fourth chord plate 241, and the fourth light receiver 109 is mounted on the other side of the inner side of the fourth chord plate 241, corresponding to the fourth light projector 108. A second muting sensor 72 is mounted on one side of the outer side of the third chord plate 231 (the second muting sensor 72 is preferably mounted on the outer side of the third chord plate 231 on the side closest to the fourth light projector 108). The fourth light projector 108, the fourth light receiver 109, and the second muting sensor 72 are parallel to the platform rail 8. The fourth light projector 108 and the fourth light receiver 109 extend continuously to both ends of the fourth chord plate 241. The fourth light projector 108 and the fourth light receiver 109 are arranged in a segment at a first distance. The second muting sensors 72 are distributed at the same distance as the first distance, and the number of the second muting sensors 72 is the same as the number of segments of the fourth light projector 108.

[0078] When the upper ladder 22 extends to its maximum position along the lower ladder 21, the uppermost unit of the first muting sensor 71 is not triggered by the lower edge of the second chord plate 221. When the fourth chord plate 241 extends to its maximum position along the third chord plate 231, the unit of the second muting sensor 72 closest to the movable platform 24 is not triggered by the edge of the fourth chord plate 241 closest to the fixed platform 23.

[0079] The passenger protection system for the airlift of this embodiment also includes a safety controller 4. A loadout controller 5 and a travel controller 6 are mounted on a base 3. The loadout is mounted above the base 3, and the safety controller 4 is disposed within the base 3. The safety controller 4 is electrically connected to the safety grating assembly 1, the loadout controller 5, and the travel controller 6. The safety controller 4 receives signals from the safety grating assembly 1 and controls the loadout controller 5 and the travel controller 6. The loadout controller 5 controls the loadout 2, such as the upper ladder and the sliding speed of the movable platform. The travel controller 6 controls the movement of the airlift base 3.

[0080] During the operation of the passenger protection system on the boarding ladder, if Figure 1 、 Figure 2 As shown, when the boarding ladder is fully extended, the light axes of the first projector 101, the second projector 103, the third projector 106, and the fourth projector 108 are received by the first light receiver 102, the second light receiver 104, the third light receiver 107, and the fourth light receiver 109, and all passenger activity areas are covered and detected by the safety grating assembly 1.

[0081] When a passenger or debris is present on the lower ladder 21, upper ladder 22, fixed platform 23, or movable platform 24, the safety light curtain assembly 1 detects a signal, and upon receiving the control signal, the safety controller 4 controls the upper load controller 5 and the driving controller 6 to terminate the movement of the base 3 and upper load 2, thereby preventing passenger injury or debris from being caught in the moving mechanism of the boarding ladder and causing damage. After the passenger or debris leaves the lower ladder 21, upper ladder 22, fixed platform 23, or movable platform 24, the safety light curtain assembly 1 loses the detection signal. Upon losing the signal, the safety controller 4 releases the restrictions on the upper load controller 5 and the driving controller 6, resuming the movement of the base 3 and upper load, and allowing the boarding ladder to continue its subsequent movement.

[0082] When the airstairs are converted from the extended state to the retracted state, Figure 1 、 Figure 2 、 Figure 3As shown, the relative relationship between the first light projector 101 and the first light receiver 102 remains unchanged, while the second light projector 103 and the second light receiver 104 slide downward along with the upper ladder 22. During this sliding process, the first shielding sensors 71 are sequentially triggered by the second chord plate 221 from top to bottom. Each time a first shielding sensor 71 is triggered, the safety controller 4 sequentially shields a group of second light projectors 103 and second light receivers 104 from bottom to top, thereby preventing the safety light curtain assembly 1 from being falsely triggered by the first chord plate 211. It should be noted that each first shielding sensor 71 is always triggered before its corresponding section of second light projectors 103 and second light receivers 104 are blocked by the first chord plate 211. In the absence of passengers or obstacles, the second light receiver 104 will not trigger a detection signal regardless of how the upper ladder 22 moves. However, if a passenger or obstacle is present within the unshielded area between the second light receiver 104 and the second light projector 103, the second light receiver 104 generates a trigger signal, instructing the safety controller 4 to take subsequent actions. The relative relationship between the third light projector 106 and the third light receiver 107 remains unchanged, while the fourth light projector 108 and the fourth light receiver 109 slide left and right following the fourth chord plate 241. During this sliding process, the second shielding sensors 72 are sequentially triggered by the fourth chord plate 241 from front to back. Each time a second shielding sensor 72 is triggered, the safety controller 4 sequentially shields a group of fourth light projectors 108 and fourth light receivers 109 from back to front, thereby preventing the safety light curtain assembly 1 from being accidentally triggered by the third chord plate 231. It should be noted that each second shielding sensor 72 is always triggered before its corresponding section of fourth light projectors 108 and fourth light receivers 109 is blocked by the third chord plate 231. In the absence of a passenger or obstacle, no detection signal is triggered by the fourth light projector 108, regardless of how the fourth chord plate 241 moves. However, if a passenger or obstacle is present within the area exposed by the fourth light projector 108, the fourth light projector 108 generates a trigger signal, instructing the safety controller 4 to take subsequent actions.

[0083] When the airstairs are in the fully retracted position, Figure 3 As shown, the relative relationship between the first light projector 101 and the first light receiver 102 remains unchanged, and all first shielding sensors 71 are triggered by the second chord plate 72. At this time, the detection signals of each section of the second light projector 103 and the second light receiver 104 are shielded. The relative relationship between the third light projector 106 and the third light receiver 107 remains unchanged, and all second shielding sensors 72 are triggered by the fourth chord plate 241. At this time, the detection signals of each section of the fourth light projector 108 and the fourth light receiver 109 are shielded.

[0084] As can be seen from the above embodiments, the passenger protection system of the boarding ladder of the present invention can ensure that no matter what state the boarding ladder is in (including fully deployed state, fully retracted state, semi-deployed state, upper load movement state, driving state, etc.), it can effectively detect whether there are passengers or debris in the passenger activity area, thereby terminating the boarding ladder movement in a timely manner.

[0085] The present invention also proposes a method for setting up an airlift passenger protection system, which is applicable to the above-mentioned airlift passenger protection system and includes the following steps:

[0086] Determining the position of the muting sensor on the first passenger elevator closest to the second passenger elevator or the muting sensor on the fixed platform closest to the movable platform when deployed to the maximum distance based on the sliding speed of the second passenger elevator relative to the first passenger elevator or the sliding speed of the movable platform relative to the fixed platform, and the maximum sensing radius of the muting sensor;

[0087] Determine the maximum segment length of the light projector and the light receiver on the passenger elevator or the platform based on the sliding speed of the second passenger elevator relative to the first passenger elevator or the sliding speed of the movable platform relative to the fixed platform, the maximum delay time of the safety light grid, and the maximum delay time of the safety controller;

[0088] Determine the actual number of segments and actual segment length of the light emitters and light receivers on the passenger elevator or platform based on the maximum segment length and maximum setting length of the light emitters and light receivers on the passenger elevator or platform;

[0089] The installation positions of the light emitters and light receivers on the passenger elevator or platform are determined based on the actual number of segments and actual segment lengths of the light emitters and light receivers on the passenger elevator or platform, and the light emitters and light receivers are arranged in a direction parallel to the slide rails on the passenger elevator or platform;

[0090] The position of the muting sensor is set based on the position of the projector.

[0091] Specifically, the calculation formula for the position of the muting sensor on the first passenger elevator closest to the second passenger elevator or the muting sensor on the fixed platform closest to the movable platform when deployed to the maximum distance is:

[0092] Lb1'=kb(b-tp1 v1);

[0093] Where Lb1' is the distance from the sensing center point of the muting sensor closest to the second passenger elevator on the first passenger elevator when deployed to its maximum distance to the second passenger elevator chord plate, or the distance from the sensing center point of the muting sensor closest to the movable platform on the fixed platform when deployed to its maximum distance to the movable platform chord plate; kb is the first redundancy factor, the specific value of which is determined based on on-site commissioning; b is the maximum sensing radius of the muting sensor; tp1 is the signal delay time of the muting sensor; and v1 is the sliding speed of the second passenger elevator relative to the first passenger elevator, or the sliding speed of the movable platform relative to the fixed platform. b, tp1, and v1 can all be obtained from the muting sensor's factory inspection report or a test report provided by a qualified testing agency.

[0094] The calculation formula for the maximum segment length of the projector and receiver on the passenger elevator or platform is:

[0095] L1'=v1 (t1-ta-tb);

[0096] Where L1' is the maximum segment length between the emitter and receiver; t1 is the theoretical maximum acceptable time for the shielded safety light curtain to be exposed. This value is determined by the size of the staircase and can be the ratio of the distance between two steps, Ha, to v1 (Ha / v1), or the ratio of a section of the platform to v1; ta is the maximum delay time of the safety light curtain; and tb is the maximum delay time of the safety controller. ta and tb can be obtained from the factory inspection reports of the safety light curtain and safety controller, respectively, or from test reports provided by a qualified testing agency.

[0097] The formula for calculating the actual number of segments of emitters and receivers on a passenger elevator or platform is:

[0098] P'=P+1, P=Lm1' / L1'rounded down, Lm1'=Lm1-(kc Ln1);

[0099] Wherein, P' is the actual number of segments of the emitter and receiver; Lm1 is the maximum setting length of the emitter and receiver, and the parameter Lm1 depends on the chord length of the passenger elevator or platform; Lm1' represents the actual maximum setting length of the emitter and receiver; kc is the second redundancy coefficient, and the specific value is determined according to the on-site commissioning situation; Ln1 is the minimum distance between the emitter and receiver closest to the end of the chord and the end of the chord, to ensure that the shielding sensor is always triggered before its corresponding emitter and receiver are blocked by the chord.

[0100] The calculation formula for the actual segment length of the projector and receiver on the passenger elevator or platform is: L1''=Lm1' / P'.

[0101] The following describes in detail the method for setting up the passenger protection system of the boarding elevator of the present invention, taking the setting process of the passenger protection system of the boarding elevator of the preferred embodiment as an example.

[0102] 1. First, confirm the position of the first shielding sensor. The method of determination is as follows:

[0103] 1.1. The arrangement angle of the first shielding sensor is parallel to the lower ladder rail. The setting position should ensure that when the upper and lower ladders are fully folded, the second string plate can fully trigger the first shielding sensor;

[0104] 1.2. When the upper and lower ladders are fully extended, the distance between the first shielding sensor closest to the upper ladder and the second chord plate is determined as follows:

[0105] 1.2.1. Obtain the sensing center point a, maximum sensing radius b, and signal delay time tp1 of the first shielding sensor according to the factory inspection report of the first shielding sensor or the test report submitted by a qualified testing organization. Figure 4 ;

[0106] 1.2.2. According to the signal delay time tp1 and the sliding speed v1 of the ladder, use the formula Lb=tp1 v1 obtains the first muting sensor delay distance Lb;

[0107] 1.2.3. Select the redundancy coefficient kb according to the commonly used redundancy coefficient of the system or the actual situation;

[0108] 1.2.4. The distance Lb1' from the sensing center point a of the topmost first shielding sensor to the second chord plate of the upper ladder at its maximum extension is calculated as Lb1' = kb (b - Lb).

[0109] 2. Determine the theoretical maximum segment length of the second projector and the second receiver. The determination method is as follows:

[0110] 2.1. First determine the sliding speed v1 of the ladder, then determine the theoretical maximum acceptable time t1 for the shielded safety grating to be exposed, and then according to the formula v1 t1=L1 calculates the theoretical segment length L1;

[0111] 2.2. Since the safety light curtain and safety controller have a certain delay in actual operation, the maximum delay time ta of the safety light curtain and the maximum delay time tb of the safety controller should be obtained according to the factory inspection report of the safety light curtain and safety controller or the test report submitted by a qualified testing organization;

[0112] 2.3. Calculate the actual maximum acceptable time t1'=t1-(ta+tb) for the shielded safety grating to be exposed;

[0113] 2.4、Calculate the theoretical maximum segment length L1'=v1 t1'.

[0114] 3. Determine the number of segments and the final segment length of the second emitter and the second receiver. The determination method is as follows:

[0115] 3.1. The second projector and the second light receiver are parallel to the lower ladder rail, with one end ending at the rear end of the third projector and the third light receiver, and the other end ending at the upper end of the first chord plate. The maximum setting length Lm1 of the second projector and the second light receiver can be calculated or measured;

[0116] 3.2. When the upper ladder is retracted after being extended to its maximum distance, the second light emitter and the second light receiver cannot be close to the upper end of the first chord plate because the sensing center point a of the top first shielding sensor is separated from the second chord plate by a distance Lb1'. Based on the commonly used redundancy coefficient of the system or the actual situation, the redundancy coefficient kc is taken. The minimum distance between the second light emitter and the second light receiver and the upper end of the first chord plate should be Ln1'=kc. Ln1;

[0117] 3.3. The actual maximum setting length of the second light emitter and the second light receiver is Lm1'=Lm1-Ln1';

[0118] 3.4. Assume Lm1' / L1'=P * Q, then the number of segments of the second light emitter and the second light receiver is P+1;

[0119] 3.5. The final segment length of the second light projector and the second light receiver is L1''=Lm1' / (P+1).

[0120] 4. Similar to the above process, determine the position of the second muting sensor. The determination method is as follows:

[0121] 4.1. The second shielding sensor is arranged parallel to the platform rail. The setting position must ensure that when the third and fourth chord plates are completely overlapped, the fourth chord plate can fully trigger the second shielding sensor.

[0122] 4.2. When the third and fourth chord plates are fully extended, the distance between the second shielding sensor closest to the fourth chord plate and the fourth chord plate is determined as follows:

[0123] 4.2.1. Obtain the sensing center point a, maximum sensing radius c, and signal delay time tp2 of the second shielding sensor based on the factory inspection report of the second shielding sensor or a test report provided by a qualified testing organization;

[0124] 4.2.2. According to the signal delay time tp2 and the fourth platform sliding speed v2, use the formula Lc=tp2 v2 obtains the second shielding sensor delay distance Lc;

[0125] 4.2.3. Select the redundancy coefficient ke according to the commonly used redundancy coefficient of the system or the actual situation;

[0126] 4.2.4 The distance Lc1' from the sensing center point a of the second shielding sensor closest to the movable platform to the fourth chord plate of the movable platform at its maximum extension is calculated as Lc1' = ke (b - Lb).

[0127] 5. Determine the theoretical maximum segment length of the fourth projector and the fourth receiver. The determination method is as follows:

[0128] 5.1. First determine the sliding speed v2 of the fourth chord plate, then determine the theoretical maximum acceptable time t1 for the shielded safety grating to be exposed, and then according to formula v2 t1=L2 calculates the theoretical segment length L2;

[0129] 5.2. Since the safety light curtain and safety controller have a certain delay in actual operation, the maximum delay time ta of the safety light curtain and the maximum delay time tb of the safety controller should be obtained according to the factory inspection report of the safety light curtain and safety controller or the test report submitted by a qualified testing organization;

[0130] 5.3. Calculate the actual maximum acceptable time t2'=t2-(ta+tb) for the shielded safety grating to be exposed;

[0131] 5.4. Calculate the theoretical maximum segment length L2'=v2 t2'.

[0132] 6. Determine the number of segments and the final segment length of the fourth emitter and the fourth receiver. The determination method is as follows:

[0133] 6.1. The fourth projector and the fourth light receiver are parallel to the platform rail and extend to both ends of the fourth chord plate. The maximum setting length of the fourth projector and the fourth light receiver can be calculated or measured to be Lm2;

[0134] 6.2. When the fourth chord plate, which has been extended to its maximum distance, is retracted, the fourth emitter and the fourth light receiver cannot be placed close to the rear side of the fourth chord plate because the sensing center point a of the second shielding sensor at the front is spaced Lb2' from the fourth chord plate. Based on the commonly used redundancy factor of the system or the actual situation, the redundancy factor kf is taken. The minimum distance between the fourth emitter and the fourth light receiver and the upper end of the third chord plate is Ln2'=kf Ln2;

[0135] 6.3. The actual maximum length of the fourth light emitter and the fourth light receiver is Lm2'=Lm2-Ln2';

[0136] 6.4. Assume that Lm2' / L2'=G*H, then the number of segments of the fourth light emitter and the fourth light receiver is G+1;

[0137] 6.5. The final segment length of the fourth light projector and the fourth light receiver is L2''=Lm2' / (G+1).

[0138] Based on the above calculation process, the configuration method of the passenger protection system of the boarding ladder in the above preferred embodiment is as follows:

[0139] S1: Install the first muting sensor: The first muting sensor is arranged parallel to the lower ladder rail and is installed on the outside of the first chord plate. When the upper and lower ladders are fully extended, the distance between the center point a of the uppermost first muting sensor and the second chord plate is Lb1'. Lb1' is calculated using the following formula:

[0140] Lb1'=kb(b-Lb);

[0141] Lb=tp1 v1;

[0142] Among them, v1 is the sliding speed of the ladder, tp1 is the signal delay time of the first shielding sensor, Lb is the delay distance of the first shielding sensor, b is the maximum sensing radius of the first shielding sensor, and kb is the redundancy coefficient.

[0143] S2: Calculate the theoretical maximum segment length L1' of the second light emitter and the second light receiver. L1' is calculated using the following formula:

[0144] L1'=v1 t1';

[0145] t1'=t1-(ta+tb);

[0146] Among them, tb is the maximum delay time of the safety controller, ta is the maximum delay time of the safety grating, t1 is the theoretical maximum acceptable time for the shielded safety grating to be exposed, t1' is the actual maximum acceptable time for the shielded safety grating to be exposed, and v1 is the sliding speed of the ladder.

[0147] S3: Install the second light projector and the second light receiver: The second light projector and the second light receiver are parallel to the lower ladder rail and are correspondingly installed on the two inner sides of the second chord plate. The final segment length of the second light projector and the second light receiver is L1'', and the number of segments is P'. L1'' and P' are calculated by the following formula:

[0148] L1''=Lm1' / P';

[0149] P'=P+1, P=Lm1' / L1'rounded down;

[0150] Lm1'=Lm1-Ln1';

[0151] Ln1'=kc Ln1;

[0152] Among them, Lm1 is the maximum setting length of the second projector and the second light receiver, kc is the redundancy coefficient, Ln1 is the minimum distance between the second projector and the second light receiver and the upper end of the first chord plate, and Lm1' is the actual maximum setting length of the second projector and the second light receiver.

[0153] S4: Install the second muting sensor: The second muting sensor is arranged parallel to the platform rail and is installed on the outside of the third chord plate. When the third chord plate is fully extended from the fourth chord plate, the distance between the center point a of the second muting sensor closest to the fourth chord plate and the fourth chord plate is Lb2'. Lb2' is calculated by the following formula:

[0154] Lb2'=ke(b-Lc);

[0155] Lb=tp2 v2;

[0156] Wherein, v2 is the sliding speed of the fourth platform, tp2 is the signal delay time of the second shielding sensor, Lb is the delay distance of the second shielding sensor, b is the maximum sensing radius of the second shielding sensor, and ke is the redundancy coefficient.

[0157] S5: Calculate the theoretical maximum segment length L2' of the fourth light projector and the fourth light receiver. L2' is calculated using the following formula:

[0158] L2'=v2 t2';

[0159] t2'=t2-(ta+tb);

[0160] Among them, tb is the maximum delay time of the safety controller, ta is the maximum delay time of the safety grating, t2 is the theoretical maximum acceptable time for the shielded safety grating to be exposed, t2' is the actual maximum acceptable time for the shielded safety grating to be exposed, and v2 is the sliding speed of the fourth platform.

[0161] S6: Install the fourth light emitter and the fourth light receiver: The fourth light emitter and the fourth light receiver are parallel to the platform rail and are correspondingly arranged on the two inner sides of the fourth chord plate. The final segment length of the fourth light emitter and the fourth light receiver is L2'', and the number of segments is G'. L2' and G' are calculated by the following formula:

[0162] L2''=Lm2' / G';

[0163] G'=G+1, G=Lm2' / L2' rounded down;

[0164] Lm2'=Lm2-Ln2';

[0165] Ln2'=kf Ln2;

[0166] Lm2 is the maximum setting length of the fourth projector and the fourth light receiver, kf is the redundancy factor, Ln2 is the minimum distance between the fourth projector and the fourth light receiver and the third chord plate, and Lm2' is the actual maximum setting length of the fourth projector and the fourth light receiver.

[0167] S7: Install a first light projector and a first light receiver, which are parallel to the lower ladder rail and correspondingly arranged on two inner sides of the first chord plate.

[0168] S8: Install a third light projector and a third light receiver. The third light projector and the third light receiver are parallel to the platform slide rail and are correspondingly arranged on two inner sides of the third chord plate.

[0169] It should be noted that the directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "inside", "outside", "top", and "bottom" are all based on the directions or positional relationships shown in the accompanying drawings. Such expressions are only intended to make the description of the present invention simpler and more convenient, and do not indicate or imply that the referred components must have a specific direction or be constructed and operated in a specific direction.

[0170] In addition, in this application, unless otherwise expressly specified or limited, terms such as "connected," "disposed," and similar terms should be interpreted broadly. For example, "connected" can mean fixed, removable, or integral; it can mean mechanical or electrical; it can mean direct, indirect through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0171] The present invention has the following beneficial effects:

[0172] 1) The present invention can achieve all-round monitoring of the passenger activity space of the boarding elevator by deploying a full-coverage safety grating assembly in the passenger passage area, ensuring that the boarding elevator passenger protection system has no blind spots.

[0173] 2) By providing segmented safety gratings and shielding switches, the present invention ensures that the entire system can continue to operate normally during dynamic operations such as the extension and retraction of the loading mechanism on the boarding ladder. There is no false triggering due to mechanism movement, and no detection failure. The operation is reliable and the logic is simple.

[0174] 3) This invention can improve operational efficiency through streamlined logic design while ensuring system reliability, effectively balancing safety and operational continuity, and providing key technical support for the intelligent upgrade of boarding stairs.

[0175] Although the above methods are illustrated and described as a series of acts for simplicity of explanation, it is to be understood and appreciated that these methods are not limited by the order of the acts, as some acts may occur in a different order and / or concurrently with other acts from those illustrated and described herein or not illustrated and described herein but understandable to those skilled in the art according to one or more embodiments.

[0176] The configuration and arrangement of the present application, as shown in various exemplary embodiments, are illustrative only. Although only a few embodiments are described in detail in this disclosure, those reading this disclosure will readily appreciate that numerous modifications are possible (e.g., size, structure, shape, and proportions, as well as parameter values, mounting arrangements, use of materials, etc.) without materially departing from the novel teachings and advantages of the subject matter described herein. For example, elements shown as integrally formed may be constructed from multiple parts or components, the positions of components may be inverted or otherwise altered, and the nature, number, or position of discrete components may be modified or changed. All such modifications are therefore intended to be encompassed within the scope of this invention. The order or sequence of any process or method steps may be altered or resequenced according to alternative embodiments. In the claims, any "means-plus-function" clause is intended to cover structures described herein that perform the recited function, including not only structural equivalents but also equivalent structures. Various modifications and variations may be made by those skilled in the art based on the present invention without departing from the spirit and substance of the invention, and such modifications and variations are intended to fall within the scope of this invention.

Claims

1. A passenger protection system for an airstaircase, characterized in that: include: base; A passenger elevator is provided on a base and includes a first passenger elevator and a second passenger elevator in sliding connection, wherein the first passenger elevator and the second passenger elevator respectively include steps and chord plates provided on both sides of the steps, and the steps of the second passenger elevator are wider than the steps of the first passenger elevator; The safety light curtain assembly includes a light projector and a light receiver. The light projector is arranged on the inner side of the chord plate on one side of the steps of the first and second passenger elevators, and the light receiver is arranged on the inner side of the chord plate on the other side of the steps of the first and second passenger elevators. The position of the light receiver corresponds to the position of the light projector. The light projector is used to project light, and the light receiver is used to receive the light projected by the light projector. A safety controller is provided on the base and connected to the safety grating assembly, and controls the movement of the base and / or the passenger elevator according to the detection signal of the safety grating assembly, and restricts the movement of the base and / or the passenger elevator when the safety grating assembly detects an object blocking the light. The shielding sensor is arranged on the outside of the string plate of the first passenger elevator near the projector on the second passenger elevator. The number and position of the shielding sensors on the first passenger elevator correspond to the number and position of the projectors on the second passenger elevator. The shielding sensor is used to shield the detection signal of the corresponding safety grating assembly from being transmitted to the safety controller.

2. The passenger protection system for an airstairs according to claim 1, characterized in that: The installation position of the muting sensor on the first passenger elevator closest to the second passenger elevator ensures that the muting sensor on the first passenger elevator closest to the second passenger elevator is not triggered by the chord plate of the second passenger elevator when the second passenger elevator and the first passenger elevator are deployed to the maximum position.

3. The passenger protection system for an airstaircase according to claim 1, characterized in that: A platform is horizontally arranged at the upper end of the passenger elevator, which includes a walking platform and chord plates arranged on both sides of the walking platform; A light projector is provided on the inner side of the string plate on one side of the walking platform, and a light receiver is provided on the inner side of the string plate on the other side, and the position of the light receiver corresponds to the position of the light projector.

4. The passenger protection system for an airstairs according to claim 3, characterized in that: The platform includes a fixed platform and a movable platform. The fixed platform and the movable platform respectively include a walking platform and chord plates arranged on both sides of the walking platform. One end of the fixed platform is connected to the upper end of the passenger elevator, and the other end is slidably connected to the movable platform. The walking platform of the movable platform is wider than the walking platform of the fixed platform. A projector is provided on the inner side of the chord plate on one side of the walking platform of the fixed platform and the movable platform, and a light receiver is provided on the inner side of the chord plate on the other side of the walking platform of the fixed platform and the movable platform. A shielding sensor is provided on the outer side of the chord plate of the fixed platform close to the projector on the movable platform. The number and position of the shielding sensors on the fixed platform correspond to the number and position of the projectors on the movable platform. The shielding sensor is used to shield the detection signal of the corresponding safety grating component from being transmitted to the safety controller. The installation position of the shielding sensor on the fixed platform closest to the movable platform ensures that the shielding sensor on the fixed platform closest to the movable platform is not triggered by the chord plate of the movable platform when the movable platform and the fixed platform are unfolded to the maximum position.

5. The passenger protection system for an airstaircase according to claim 4, characterized in that: The outer sides of the chord plates on both sides of the first passenger elevator are provided with slide rails, and the inner sides of the chord plates on both sides of the second passenger elevator are provided with sliders. The second passenger elevator slides on the slide rails through the sliders and is slidably connected to the first passenger elevator. The outer sides of the chord plates on both sides of the walking platform of the fixed platform are provided with slide rails, and the inner sides of the chord plates on both sides of the walking platform of the movable platform are provided with sliders. The movable platform slides on the slide rails through the sliders and is slidably connected to the fixed platform.

6. The passenger protection system for an airstaircase according to claim 5, characterized in that: The light projector, light receiver, shielding sensor on the first passenger elevator and the light projector and light receiver on the second passenger elevator are arranged in a direction parallel to the upper slide rail of the first passenger elevator; The light projector, the light receiver, the shielding sensor on the fixed platform and the light projector and the light receiver on the movable platform are all arranged in a direction parallel to the slide rail on the fixed platform.

7. The passenger protection system for an airstairs according to claim 4, characterized in that: It also includes a travel controller and a bodywork controller that are arranged on the base and connected to the safety controller; The travel controller controls the movement of the base according to the instructions of the safety controller; The upper structure controller controls the movement of the passenger elevator and platform according to the instructions of the safety controller.

8. A method for setting up a passenger protection system for an airstaircase, characterized in that: The steps include: Determining the position of the muting sensor on the first passenger elevator closest to the second passenger elevator or the muting sensor on the fixed platform closest to the movable platform when deployed to the maximum distance based on the sliding speed of the second passenger elevator relative to the first passenger elevator or the sliding speed of the movable platform relative to the fixed platform, and the maximum sensing radius of the muting sensor; Determine the maximum segment length of the light projector and the light receiver on the passenger elevator or the platform based on the sliding speed of the second passenger elevator relative to the first passenger elevator or the sliding speed of the movable platform relative to the fixed platform, the maximum delay time of the safety light grid, and the maximum delay time of the safety controller; Determine the actual number of segments and actual segment length of the light emitters and light receivers on the passenger elevator or platform based on the maximum segment length and maximum setting length of the light emitters and light receivers on the passenger elevator or platform; Determine the installation positions of the light emitters and light receivers on the passenger elevator or platform based on the actual number of segments and actual segment lengths of the light emitters and light receivers on the passenger elevator or platform; The position of the muting sensor is set based on the position of the projector.

9. The method for setting up a passenger protection system for an airstaircase according to claim 8, characterized in that: The calculation formula for the position of the muting sensor on the first passenger elevator closest to the second passenger elevator or the muting sensor on the fixed platform closest to the movable platform when the elevator is deployed to the maximum distance is: Lb1’=kb(b-tp1 v1); Wherein, Lb1' is the distance from the sensing center point of the shielding sensor closest to the second passenger elevator on the first passenger elevator when deployed to the maximum distance to the second passenger elevator chord plate, or the distance from the sensing center point of the shielding sensor closest to the movable platform on the fixed platform when deployed to the maximum distance to the movable platform chord plate, kb is the first redundancy coefficient, b is the maximum sensing radius of the shielding sensor, tp1 is the signal delay time of the shielding sensor, and v1 is the sliding speed of the second passenger elevator relative to the first passenger elevator or the sliding speed of the movable platform relative to the fixed platform.

10. The method for setting up a passenger protection system for an airstaircase according to claim 9, characterized in that: The calculation formula for the maximum segment length of the projector and receiver on the passenger elevator or platform is: L1'=v1 (t1-ta-tb); Among them, L1' is the maximum segment length of the projector and the light receiver, t1 is the theoretical maximum acceptable time for the shielded safety grating to be exposed, ta is the maximum delay time of the safety grating, and tb is the maximum delay time of the safety controller; The formula for calculating the actual number of segments of emitters and receivers on a passenger elevator or platform is: P'=P+1, P=Lm1' / L1'rounded down, Lm1'=Lm1-(kc Ln1); Wherein, P' is the actual number of segments of the projector and the light receiver, Lm1 is the maximum setting length of the projector and the light receiver, Lm1' represents the actual maximum setting length of the projector and the light receiver, kc is the second redundancy coefficient, and Ln1 is the minimum distance between the projector and the light receiver closest to the end of the string plate and the end of the string plate; The calculation formula for the actual segment length of the projector and receiver on the passenger elevator or platform is: L1''=Lm1' / P'.

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