WO2017032286A1 - 一种用于地铁玻璃屏蔽门上投影成像装置 - Google Patents

一种用于地铁玻璃屏蔽门上投影成像装置 Download PDF

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WO2017032286A1
WO2017032286A1 PCT/CN2016/096175 CN2016096175W WO2017032286A1 WO 2017032286 A1 WO2017032286 A1 WO 2017032286A1 CN 2016096175 W CN2016096175 W CN 2016096175W WO 2017032286 A1 WO2017032286 A1 WO 2017032286A1
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screen
central control
subway
glass
information
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PCT/CN2016/096175
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English (en)
French (fr)
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姜旭东
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姜旭东
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B31/00—Arrangements for the associated working of recording or reproducing apparatus with related apparatus

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  • the invention belongs to the technical field of subway advertising equipment, and particularly relates to an information and advertisement projection imaging device for a subway glass screen door.
  • the timeliness of the subway is the preferred means of transportation in the city today.
  • the subway is also known as the invisible second city because of its huge underground network and traffic.
  • the subway space is relatively closed, free from external environmental disturbances, and the attention of waiting passengers is relatively concentrated. Combined with the regular waiting time, the information attention rate will increase significantly.
  • the existing information release of the subway is divided into two categories, one is static information, mainly using light boxes and stickers.
  • the other type is dynamic information, which is published using LCD or LED screens in subway cars, stations, stations and passages.
  • the conventional electronic equipment used for dynamic information is restricted by physical characteristics and the safety of subway operations. It cannot be placed on the glass screen door (separation) of the station with the longest passenger stay and strong attention. Therefore, variable transparency projection glass (film) display technology is currently the most ideal display technology.
  • the object of the present invention is to overcome the deficiencies of the above-mentioned conventional display technology in the application of the screen door, and to meet the strict requirements of the subway for safe operation, and realize the information display and interaction on the glass screen door under the premise of ensuring safety.
  • a projection imaging device for a subway glass screen door comprising a central control system, a signal sensing system, an information transmission system, a display system, a sound system and a security protection system; the central control system and the signal sensing system, the information transmission system, a display system, a sound system, and a security protection system connection;
  • the security protection system includes a platform crowd concentration sensor, a screen brightness sensor, a projector attitude sensor, and a physical emergency switching controller;
  • the platform crowd intensity sensor is used for detecting the crowd density of the platform, and the detection result is fed back to the central control system through the information transmission system;
  • the screen brightness sensor is configured to provide brightness calibration information of the display system, and feed the detection result to the central control system through the information transmission system;
  • the attitude sensor is configured to provide projector attitude adjustment information, and feed the adjustment information to the central control system through the information transmission system;
  • the physical emergency controller is also connected to a power source of the display system for artificially controlling the opening and closing of the display system.
  • the projection imaging apparatus further includes an interactive system connected to the central control system through an information transmission system, the interactive system including a multi-touch screen, and the multi-touch screen is mounted on the platform side display system by an attaching process. on.
  • the signal sensing system includes: a train trigger sensor and a subway operation signal transmitter. among them:
  • the train trigger sensor is installed in the tunnel on both sides of the platform to provide a trigger command for opening and closing of the display system;
  • the train trigger sensor is selected from the group consisting of infrared, laser, electromagnetic, audio, pressure, displacement or wind speed sensors;
  • the subway operation signal transmitter is configured to transmit PIS information, system timing information and emergency early warning control information of the train entry and exit station uniformly provided by the subway operation control center.
  • the central control system includes: an embedded control host, a control protocol, and a control interface;
  • the embedded control host adopts an industrial-grade processing platform and a supporting operating system
  • the control protocol includes: a protocol such as TCP_IP/RS232/422/485/MOD BUS/CAN;
  • the control interface includes: an interface such as RJ45/IR/IO/Relay.
  • the information transmission system includes a control information transmitter and an image information transmitter, and the transmission modes used include twisted pair, optical fiber, radio frequency cable, WIFI, and wireless radio frequency transmission.
  • the display system includes a projector and a screen display device
  • the projector is a high-definition projector, the definition is not less than 2K, and is installed in the platform track area
  • the screen display device is a double-layer glass sandwich structure
  • the middle layer is a dimming film, or the dimming film is attached to the existing screen glass by electrostatic adsorption, the dimming film is connected with the power source, and the fogging and transparency of the dimming film is realized by turning on and off the power source. state.
  • the sound system includes: a power amplifier and an interface-fitting sounding unit; the power amplifier uses a constant pressure and a fixed-resistance output form; the sounding unit uses an attaching process to attach a shield to one side of the rail row area On the door glass.
  • the present invention also provides a method for performing projection imaging by using the above projection imaging apparatus, specifically:
  • the central control system activates the display system, the sound system and/or the interaction.
  • the system is running.
  • the screen display device is powered on, the dimming film is in a fog state, and the projector projects the image onto the fog screen display device;
  • the central control system When the signal sensing system feeds back the train arrival signal to the central control system or the station crowd concentration sensor detection result is higher than the set safety value upper limit, the central control system will stop displaying the system, sound system and/or interactive system operation. At this time, the power of the screen display device is disconnected, the dimming film is in a transparent state, the projector stops working, and the glass on the subway screen door is restored to its original state.
  • the screen brightness sensor feeds the ambient light sensing data to the central control system through the information transmission system, and automatically adjusts the brightness of the display screen through the central control system to improve the screen comfort.
  • the projection imaging apparatus mounts the projector in the track area of the platform and projects the image onto the dimming glass (film).
  • the screen display information the passenger uses the touch form to interact with the screen door content; when the train is about to enter the station, the screen door displays the train arrival message, when the interactive function is closed, the screen door is restored transparent, when the train After leaving, the screen door resumes display and interaction.
  • the density detector will detect whether there are passengers waiting nearby, and can control the switch of the corresponding screen display system.
  • the central control system will stop the projection display work, restore the transparent state of the screen door, ensure that the crowd does not gather in front of the display, and improve the safety guarantee.
  • the picture brightness sensing device will automatically adjust the brightness of the screen door to avoid disturbing the subway staff's line of sight or affecting the passenger's visual effect.
  • the hoisting projector will attach an attitude sensor. When the projector is subjected to extreme wind pressure or vibration displacement changes, the central control system alarms the staff.
  • the projection imaging device can fully utilize the glass partition of the platform under the premise of ensuring safety, and can realize the high-definition image of the glass partition of the subway platform, and make the glass partition become a large-scale visualized advertising carrier, and play the dynamic image to attract Waiting for the attention of passengers, so as to achieve good advertising results and create economic benefits.
  • the glass partition can be restored to transparency, ensuring that the subway staff and passengers have a good view and ensure the safe operation of the subway. It closely meets the needs of the safe operation of the subway.
  • FIG. 1 is a schematic structural view of an embodiment of the present invention
  • FIG. 2 is a structural block diagram of an embodiment of the present invention.
  • 3 is a schematic structural view of a dimming projection film and a dimming projection glass
  • FIG. 4 is a schematic diagram showing the principle of switching between transparent and opaque states of the dimming projection film and the dimming projection glass;
  • 1-screen display device 2-multi-touch screen, 3-projector, 4-image information transmitter, 5-attitude sensor, 6-screen brightness sensor, 7-station crowd density detector, 8-dimmer Membrane power supply, 9-control information transmitter.
  • an information and advertisement projection imaging device for a subway glass screen door is a dimming function based on the function of an electronically controlled liquid crystal dimming film or an electronically controlled liquid crystal dimming glass.
  • a projection system wherein the interactive system employs a multi-touch screen 2, and the control information transmitter 9 is connected to the dimming film power supply 8 to control the transparency conversion of the dimming film; the projector 3 and the image information transmitter 4 are installed together in the track. Above the side wall of the area, the image is placed on the screen display device 1.
  • the control information transmitter 9 is connected to the multi-touch screen 2, and the multi-touch screen 2 transmits interactive data to the central control system via the control information transmitter 9.
  • the screen brightness sensor 6 and the station crowd density detector 7 are connected to the control information transmitter 9 to transmit the detection data to the central control system.
  • the attitude sensor 5 is connected to the image information transmitter 4 to transmit data to the central control system.
  • the projection mode of the present invention is a rear projection mode.
  • the projector 3 is installed above the inner side wall of the subway tunnel, and the image is placed on the screen display device 1.
  • the projection image is placed on the glass partition for the station passenger to watch.
  • the operation principle is Through the server to control whether the dimming projection film is transparent or not (on/off state) and the projection of the projector (on/off state), the following functions are realized:
  • the central control system controls the dimming film of the display device 1 to be in a transparent state (power on), display The system is turned off, the interactive touch function is turned off, and the screen door is restored to its original state;
  • the passenger can be alerted by continuous flashing of the dimming glass (film), or the image information can be used to inform the passenger that the train is about to enter the station and travel safely and orderly.
  • the information server in the display system adopts a networked embedded player, which can read data by inserting a USB disk or an SD card locally, or uniformly push resources through a network shared resource server, and configure a playback policy through dedicated software.
  • the information service player has two options:
  • the embedded player In the centralized mode, the embedded player is placed in the equipment room, and the content will be sent to the information receiver at the projector in the track area through the information transmitter through the information transmitter, and 6 to 8 units are grouped for uniform playback.
  • Information Source In the centralized mode, the embedded player is placed in the equipment room, and the content will be sent to the information receiver at the projector in the track area through the information transmitter through the information transmitter, and 6 to 8 units are grouped for uniform playback.
  • Information Source In the centralized mode, the embedded player is placed in the equipment room, and the content will be sent to the information receiver at the projector in the track area through the information transmitter through the information transmitter, and 6 to 8 units are grouped for uniform playback.
  • the embedded player is placed together with the projector in the track zone, and the video information is remotely pushed through the network, and different sources can be played separately.
  • the signal sensing system uses a variety of sensor cascade structures, such as the installation of infrared, acoustic and magnetic sensor groups at the entrance and exit ports, using sound, light and electromagnetic technology to comprehensively determine the train entry and exit stations, combined to significantly reduce the chance of misjudgment, And can ensure the system can run reliably under the condition of single damage.
  • the triggering method is changed to the backup trigger, and the PIS scheduling signal provided by the subway party is mainly used, and the sensor group is supplemented to ensure that the system still works as usual when the PIS scheduling signal fails.
  • the central control system is also connected to the physical emergency controller in the safety protection system.
  • the physical emergency controller is used for the central control system due to some component failure or other reasons, the manual control is used to turn on the screen power. This makes the dimming projection screen transparent, enabling people on the subway to see the external conditions and avoid danger.
  • the screen display device 1 adopts a dimming projection film or a dimming projection glass as a projection screen, and only needs the control system 1 to control the on and off of the power supply to realize the transparent or non-switching on the dimming film, wherein:
  • Self-adhesive dimming projection film can be directly attached to the existing glass partition. It is suitable for use on the glass partition that has been built. The surface is hardened to achieve 3H hardness and is easy to maintain.
  • the glass partition of the new subway station can use dimming projection glass, which has the same performance and self-adhesive dimming projection film, higher strength and easy maintenance.
  • the structure of the dimming projection film and the dimming projection glass is as shown in FIG. 3: the structure of the dimming projection film or the dimming projection glass is a PDLC layer in the middle, two ITO conductive layers are sandwiched outside, and two PET layers are sandwiched outside.
  • the principle of switching the transparent and opaque state of the dimming projection film and the dimming projection glass is as shown in Fig. 4: when the dimming projection film or the dimming projection glass is powered off (off state), the liquid crystal molecules are disorderly oriented, resulting in microscopic material.
  • the refractive index mismatch causes strong light scattering, and the appearance of the dimming projection film or the dimming projection glass is milky white opaque state; when the dimming projection film or the dimming projection glass is energized (on state), the electric field acts Under the order of liquid crystal molecules, the refractive index of the material tends to be uniform, and the light radiation is greatly suppressed. At this time, the appearance of the light-adjusting film is colorless and transparent.
  • the screen display device 1 uses a dedicated dimming projection film or a dimming projection glass, and has excellent imaging effect, soft picture, no dazzling bright spots, and is suitable for use in subway glass partitions.
  • the projector 3 is mounted above the inner side wall of the subway tunnel and is securely installed for maintenance-free operation.
  • Projector 3 uses engineering high-brightness, high-definition projectors, projectors can use mainstream DLP or LCOS display technology, technical specifications are not less than 1080p resolution, brightness is more than 4000 lumens, standard system meets 16:9, 16: 10 or 4:3, the light source can use a mercury lamp or a laser lamp, and the lamp life is not less than 2,000 hours.
  • the information and advertising projection imaging device for the subway glass screen door provided by the invention fully utilizes the glass partition of the platform under the premise of ensuring safety, so that the glass partition of the subway platform can display high-definition image quality, and the glass partition becomes A large visualized advertising carrier that plays dynamic images to attract the attention of waiting passengers, thereby achieving good advertising results and creating economic benefits.
  • the subway is about to enter the station
  • the glass partition can be restored to transparency, ensuring that the subway staff and passengers have a good view and ensure the safe operation of the subway. It closely meets the needs of the safe operation of the subway.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Projection Apparatus (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Liquid Crystal (AREA)

Abstract

一种用于地铁玻璃屏蔽门上投影成像装置，其为基于电控液晶调光膜或电控液晶调光玻璃的功能上构建出的调光投影系统，其中互动系统采用多点触摸屏（2），控制信息传送器（9）与调光膜电源（8）相连，控制调光膜的透明度变换；投影机（3）和图像信息传送器（4）一并安装在轨行区内侧壁上方，将影像投放到屏幕显示装置（1）上；所述控制信息传送器（9）与所述多点触摸屏（2）相连，所述多点触摸屏（2）通过控制信息传送器（9）将互动数据发送到中控系统；所述屏幕亮度传感器（6）和站台人群密度检测器（7）与控制信息传输器（9）相连，将检测数据发送到中控系统中；姿态传感器（5）与图像信息传输器（4）相连，将数据发送到中控系统中。该投影成像装置能充分保证屏蔽门显示系统的运行安全，再结合屏蔽门显示信息的新颖性和直观的视觉效果，可增强信息送达率，提升经济效益。

Description

一种用于地铁玻璃屏蔽门上投影成像装置 技术领域
本发明属于地铁广告设备技术领域，具体涉及一种用于地铁玻璃屏蔽门上的信息及广告投影成像装置。
背景技术
地铁超高的时效性是当今人们市内出行优先选择的交通工具，地铁因为其所拥有的庞大地下网络和人流量也被誉为隐形的第二城市。相比其它交通方式，地铁空间相对封闭，不受外界各种环境干扰，候车乘客的注意力相对集中，结合规律的候车时间，信息关注率会大幅上升。
地铁现有信息发布分为2大类，一类为静态信息，主要使用灯箱和贴纸。另一类是动态信息，利用地铁车厢内、站台、站厅和通道中的LCD或LED屏幕发布。动态信息所使用的常规电子设备受到物理特性的制约和地铁运营安全的限制，不能放置在乘客停留时间最长、关注力强的站台玻璃屏蔽门(隔断)上。因此，可变透明度的投影玻璃(膜)显示技术是目前最理想的显示技术。
发明内容
本发明的目的在于克服上述传统显示技术在屏蔽门应用上的不足，结合地铁对安全运营严格的需要，在保证安全前提下实现玻璃屏蔽门上的信息显示和互动。
为了实现上述发明目的，本发明采用的技术方案如下：
一种用于地铁玻璃屏蔽门上的投影成像装置，包括中控系统、信号感知系统、信息传输系统、显示系统、声音系统和安全防护系统；中控系统分别与信号感知系统、信息传输系统、显示系统、声音系统和安全防护系统连接；所述安全防护系统包括站台人群密集度感应器、屏幕亮度感应器、投影机姿态传感器和物理紧急切换控制器；
所述站台人群密集度感应器用于检测站台人群密集度，并将检测结果通过信息传输系统反馈给中控系统；
所述屏幕亮度传感器用于提供显示系统的亮度校准信息，并将检测结果通过信息传输系统反馈给中控系统；
所述姿态传感器用于提供投影机姿态调整信息，并将调整信息通过信息传输系统反馈给中控系统；
所述物理紧急控制器还与所述显示系统的电源连接，用于人为控制显示系统的打开与关闭。
进一步地，所述投影成像装置还包括互动系统，其通过信息传输系统与中控系统连接，所述互动系统包括多点触摸屏，所述多点触摸屏采用贴附工艺安装在站台一侧的显示系统上。
进一步地，所述信号感知系统包括：列车触发传感器、地铁运营信号传输器。其中：
所述列车触发传感器安装于站台两侧隧道内，为所述显示系统的开、关提供触发指令；所述列车触发传感器选自红外、激光、电磁、声频、压力、位移或风速传感器；
所述地铁运营信号传输器用于传输由地铁运营控制中心统一提供的列车进出站PIS信息、系统授时信息和紧急预警控制信息。
进一步地，所述中控系统包括：嵌入式控制主机、控制协议和控制接口；
所述嵌入式控制主机采用工业级的处理平台和配套的操作系统；
所述控制协议包括：TCP_IP/RS232/422/485/MOD BUS/CAN等协议；
所述控制接口包括：RJ45/IR/IO/Relay等接口。
进一步地，所述信息传输系统包含控制信息传送器和图像信息传送器，采用的传输方式包括双绞线、光纤、射频线缆、WIFI和无线射频输送方式。
进一步地，所述显示系统包括投影机和屏幕显示装置，所述投影机为高清投影机，清晰度不低于2K，安装在站台轨行区内；所述屏幕显示装置为双层玻璃夹层结构，中间层为调光膜，或者采用静电吸附的方式将调光膜贴合在现有屏蔽门玻璃上，调光膜与电源相连接，通过打开和关闭电源实现调光膜的雾态和透明态。
进一步地，所述声音系统包括：功率放大器和界面贴合式发声单元；所述功率放大器使用定压和定阻输出形式；所述发声单元使用贴附工艺，附着在轨行区一侧的屏蔽门玻璃上。
为实现本发明的目的，本发明还提供了一种利用上述投影成像装置进行投影成像的方法，具体为：
当信号感知系统将无列车进站信号反馈给中控系统时，且站台人群密集度感应器将有候车乘客的信息反馈给中控系统后，中控系统启动显示系统、声音系统和/或互动系统运行，此时屏幕显示装置接通电源，调光膜呈雾态，投影机将图像投射到雾态的屏幕显示装置上；
当信号感知系统将列车进站信号反馈给中控系统时或者站台人群密集度感应器探测结果高于设置的安全值上限后，中控系统将停止显示系统、声音系统和/或互动系统运行，此时屏幕显示装置的电源断开，调光膜呈透明态，投影机停止工作，地铁屏蔽门上的玻璃恢复原状。
进一步地，显示系统工作时，屏幕亮度传感器通过信息传输系统将环境光感数据反馈给中控系统，并通过中控系统自动调节显示画面亮度，提高画面舒适感。
本发明提供的投影成像装置将投影机安装在站台轨行区内，将影像投射到调光玻璃(膜)上。无列车时，屏蔽门显示信息，乘客使用触摸形式与屏蔽门内容互动；当列车即将进站时，屏蔽门显示列车即将到站提示信息，此时互动功能关闭，屏蔽门随即恢复透明，当列车驶离后，屏蔽门恢复显示和互动状态。
为了实现节能，在无列车时，密度检测仪将检测是否有乘客在附近候车，可自行控制所对应的屏蔽门显示系统的开关。当密度检测值高于安全值时，立即将数据反馈给中控系统，中控系统将停止投影显示工作，恢复屏蔽门的透明状态，确保人群不在显示屏前聚集，提高安全保证。画面亮度感应装置将自动调节屏蔽门画面亮度，以避免干扰地铁工作人员视线或影响乘客的视觉效果。考虑到轨行区内的吊装安全性，吊装投影机将附加姿态传感器，当投影机受到极大风压或震动发生位移变化时，中控系统报警提示工作人员。
本发明提供的投影成像装置，能在保障安全的前提下充分利用站台玻璃隔断，可以让地铁站台的玻璃隔断呈现高清画质的影像，使玻璃隔断成为大型可视化的广告载体，播放动态影像以吸引候车乘客的注意力，从而实现良好的广告效果，创造经济利益。当地铁即将进站时，可以在玻璃隔断上为乘客播放地铁即将进站的提示信息，当地铁进站时可以让玻璃隔断恢复透明，保证地铁工作人员和乘客拥有良好的视界，保障地铁运行安全，紧密契合地铁安全运营的需要。
附图说明
图1为本发明实施例的结构示意图；
图2为本发明实施例的结构框图；
图3为调光投影膜和调光投影玻璃的结构示意图；
图4为调光投影膜和调光投影玻璃的透明和不透明状态切换的原理示意图；
图中，1-屏幕显示装置、2-多点触摸屏、3-投影机、4-图像信息传送器、5-姿态传感器、6-屏幕亮度传感器、7-站台人群密度检测器、8-调光膜电源、9-控制信息传送器。
具体实施方式
下面结合附图和具体实施例对本发明做进一步说明。
如图1和图2所示，一种用于地铁玻璃屏蔽门上的信息及广告投影成像装置，其为基于电控液晶调光膜或电控液晶调光玻璃的功能上构建出的调光投影系统，其中互动系统采用多点触摸屏2，控制信息传送器9与调光膜电源8相连，控制调光膜的透明度变换；所述投影机3和图像信息传送器4一并安装在轨行区内侧壁上方，将影像投放到屏幕显示装置1上。所述控制信息传送器9与所述多点触摸屏2相连，所述多点触摸屏2通过控制信息传送器9将互动数据发送到中控系统。所述屏幕亮度传感器6和站台人群密度检测器7与控制信息传输器9相连，将检测数据发送到中控系统中。所述姿态传感器5与图像信息传输器4相连，将数据发送到中控系统中。
本发明的投影方式为背投方式，投影仪3安装在地铁隧道内侧壁的上方，将影像投放到所述屏幕显示装置1上，投影成像在玻璃隔断上，供站台旅客观赏，其运作原理为，通过服务器控制调光投影膜透明与否(开态/关态)和投影仪的投影与否(开态/关态)搭配，实现以下功能：
1)当收到地铁PIS进站信号或进站端隧道内的传感器组接近感知触发时，表明列车即将进站，中控系统控制屏幕显示装置1的调光膜开启透明状态(通电)、显示系统关闭，互动触摸功能关闭，屏蔽门恢复原状；
2)当收到地铁PIS离站信号或出站端隧道内的传感器组触发时，表明列车出站，中控系统控制屏幕显示装置1的调光膜开启雾态(断电)、显示系统恢复运行，互动触摸功能打开，屏蔽门隔断呈现投影图像；
3)可以通过调光玻璃(膜)的连续闪烁警醒旅客，也可以使用图像信息告知乘客列车即将进站，安全有序乘车。
显示系统中的信息服务器采用网络化的嵌入式播放器，可通过本地插入U盘或SD卡读取数据，也可通过网络共享资源服务器统一推送资源，通过专用软件配置播放策略。该 信息服务播放器有两套方案备选：
A.集中模式，嵌入式播放器放置在机房内，播放内容将通过信息发送器利用光纤将信息送至轨行区内的投影机处的信息接收器，6～8台为一组，播放统一信息源。
B.分散模式，嵌入式播放器与轨行区内的投影机放置在一起，通过网络远程推送视讯信息，可单独播放不同信源。
信号感知系统采用多种传感器级联结构，例如在进、出站口安装红外、声波和磁力传感器组，使用声、光和电磁技术综合判断列车进出站，结合在一起可显著降低误判几率，并能保证单体损坏情形下系统能够可靠运行。另根据地铁方需求将上述触发方式改为备份触发，以地铁方提供的PIS调度信号为主，传感器组为辅，确保PIS调度信号失效时，系统依旧照常工作。
另外，中控系统还与安全防护系统中的物理紧急控制器连接，物理紧急控制器用于当中控系统由于某些部件失灵或其他原因而导致不能实现自动控制时，使用手动控制接通屏幕电源，从而使调光投影屏幕变得透明，使地铁上的人能够看清外部状况，避免发生危险。
屏幕显示装置1采用调光投影膜或调光投影玻璃作为投影屏幕，只需要控制系统1控制电源的通断就可在调光膜上实现透明与否的切换，其中：
1)自贴型调光投影膜可直接在现有玻璃隔断上贴膜，适合在已经建成的玻璃隔断上使用，表面经过硬化处理，达到3H硬度，便于维护保养。
2)新建地铁站的玻璃隔断可以使用调光投影玻璃，性能和自贴型调光投影膜一致，强度更高，易于保养维护。
调光投影膜和调光投影玻璃的结构如图3所示：调光投影膜或调光投影玻璃的结构是中间为PDLC层，外夹两层ITO导电层，再外边夹两层PET层。调光投影膜和调光投影玻璃的透明和不透明状态切换的原理如图4所示：当调光投影膜或调光投影玻璃断电时(关闭状态)，液晶分子无序取向，导致材料微观折射率失配，从而产生强烈的光散射，此时调光投影膜或调光投影玻璃的外观为乳白色不透明状态；当调光投影膜或调光投影玻璃通电时(开启状态)，在电场作用下，液晶分子有序排列，材料折射率趋于一致，光辐射受到大幅抑制，此时调光膜外观呈无色透明状态。
调光投影膜和调光投影玻璃的性能参数如下表所示：
Figure PCTCN2016096175-appb-000001
屏幕显示装置1使用专用的调光投影膜或调光投影玻璃，成像效果卓越，画面柔和、无耀眼亮斑，适合用于地铁玻璃隔断。
投影仪3安装在地铁隧道内侧壁的上方，安装稳固，可免维护。投影仪3采用工程型高亮度、高清投影机，投影机可使用主流的DLP或是LCOS显示技术，技术规格为不小于1080p分辨率，亮度为4000流明以上，标准制式满足16∶9，16∶10或4∶3，光源可使用汞灯或激光灯，灯泡寿命不小于2,000小时。
本发明提供的一种用于地铁玻璃屏蔽门上的信息及广告投影成像装置在保障安全的前提下充分利用站台玻璃隔断，可以让地铁站台的玻璃隔断呈现高清画质的影像，使玻璃隔断成为大型可视化的广告载体，播放动态影像以吸引候车乘客的注意力，从而实现良好的广告效果，创造经济利益。当地铁即将进站时，可以在玻璃隔断上为乘客播放地铁即将进站的提示信息，当地铁进站时可以让玻璃隔断恢复透明，保证地铁工作人员和乘客拥有良好的视界，保障地铁运行安全，紧密契合地铁安全运营的需要。
以上所述实施例仅表达了本发明的实施方式，其描述较为具体和详细，但并不能因此而理解为对本发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (9)

  1. 一种用于地铁玻璃屏蔽门上的投影成像装置，其特征在于，包括中控系统、信号感知系统、信息传输系统、显示系统、声音系统和安全防护系统；中控系统分别与信号感知系统、信息传输系统、显示系统、声音系统和安全防护系统连接；
    所述安全防护系统包括站台人群密集度感应器、屏幕亮度感应器、投影机姿态传感器和物理紧急切换控制器；
    所述站台人群密集度感应器用于检测站台人群密集度，并将检测结果通过信息传输系统反馈给中控系统；
    所述屏幕亮度传感器用于提供显示系统的亮度校准信息，并将检测结果通过信息传输系统反馈给中控系统；
    所述姿态传感器用于提供投影机姿态调整信息，并将调整信息通过信息传输系统反馈给中控系统；
    所述物理紧急控制器还与所述显示系统的电源连接，用于人为控制显示系统的打开与关闭。
  2. 根据权利要求1所述的一种用于地铁玻璃屏蔽门上的投影成像装置，其特征在于，所述投影成像装置还包括互动系统，其通过信息传输系统与中控系统连接，所述互动系统包括多点触摸屏，所述多点触摸屏采用贴附工艺安装在站台一侧的显示系统上。
  3. 根据权利要求1或2所述的一种用于地铁玻璃屏蔽门上的投影成像装置，其特征在于，所述信号感知系统包括列车触发传感器和地铁运营信号传输器；其中：
    所述列车触发传感器安装于站台两侧隧道内，为所述显示系统的开、关提供触发指令；所述列车触发传感器选自红外、激光、电磁、声频、压力、位移或风速传感器；
    所述地铁运营信号传输器用于传输由地铁运营控制中心统一提供的列车进出站PIS信息、系统授时信息和紧急预警控制信息。
  4. 根据权利要求1或2所述的一种用于地铁玻璃屏蔽门上的投影成像装置，其特征在于，所述中控系统包括：嵌入式控制主机、控制协议和控制接口；
    所述嵌入式控制主机采用工业级的处理平台和配套的操作系统；
    所述控制协议包括：TCP_IP协议、RS-232协议、RS-422协议、RS-485协议、MOD BUS协议或CAN协议等；
    所述控制接口包括：RJ45接口、IR接口、IO接口或Relay接口等。
  5. 根据权利要求1或2所述的一种用于地铁玻璃屏蔽门上的投影成像装置，其特征在于，所述信息传输系统包含控制信息传送器和图像信息传送器，采用的传输方式包括双绞线、光纤、射频线缆、WIFI和无线射频输送方式。
  6. 根据权利要求1或2所述的一种用于地铁玻璃屏蔽门上的投影成像装置，其特征在于，所述显示系统包括投影机和屏幕显示装置，所述投影机为高清投影机，清晰度不低于2K，安装在站台轨行区内；所述屏幕显示装置为双层玻璃夹层结构，中间层为调光膜，或者采用静电吸附的方式将调光膜贴合在现有屏蔽门玻璃上，调光膜与电源相连接，通过打开和关闭电源实现调光膜的雾态和透明态。
  7. 根据权利要求1或2所述的一种用于地铁玻璃屏蔽门上的投影成像装置，其特征在于，所述声音系统包括：功率放大器和界面贴合式发声单元；所述功率放大器使用定压和定阻输出形式；所述发声单元使用贴附工艺，附着在轨行区一侧的屏蔽门玻璃上。
  8. 一种利用权利要求1-7中任一项所述的投影成像装置进行投影成像的方法，其特征在于，
    当信号感知系统将无列车进站信号反馈给中控系统时，且站台人群密集度感应器将有候车乘客的信息反馈给中控系统后，中控系统启动显示系统、声音系统和/或互动系统运行，此时屏幕显示装置接通电源，调光膜呈雾态，投影机将图像投射到雾态的屏幕显示装置上；
    当信号感知系统将列车进站信号反馈给中控系统时或者站台人群密集度感应器探测结果高于设置的安全值上限后，中控系统将停止显示系统、声音系统和/或互动系统运行，此时屏幕显示装置的电源断开，调光膜呈透明态，投影机停止工作，地铁屏蔽门上的玻璃恢复原状。
  9. 根据权利要求8所述的方法，其特征在于，显示系统工作时，屏幕亮度传感器通过信息传输系统将环境光感数据反馈给中控系统，并通过中控系统自动调节显示画面亮度，提高画面舒适感。
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