WO2020258009A1 - 一种无人值守路况预警系统及方法 - Google Patents

一种无人值守路况预警系统及方法 Download PDF

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Publication number
WO2020258009A1
WO2020258009A1 PCT/CN2019/092687 CN2019092687W WO2020258009A1 WO 2020258009 A1 WO2020258009 A1 WO 2020258009A1 CN 2019092687 W CN2019092687 W CN 2019092687W WO 2020258009 A1 WO2020258009 A1 WO 2020258009A1
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Prior art keywords
water level
tunnel
level sensor
main controller
early warning
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PCT/CN2019/092687
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English (en)
French (fr)
Inventor
胡杨
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四川易捷行信息技术有限公司
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Priority to PCT/CN2019/092687 priority Critical patent/WO2020258009A1/zh
Publication of WO2020258009A1 publication Critical patent/WO2020258009A1/zh

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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/60—Upright bodies, e.g. marker posts or bollards; Supports for road signs
    • E01F9/604—Upright bodies, e.g. marker posts or bollards; Supports for road signs specially adapted for particular signalling purposes, e.g. for indicating curves, road works or pedestrian crossings
    • E01F9/608—Upright bodies, e.g. marker posts or bollards; Supports for road signs specially adapted for particular signalling purposes, e.g. for indicating curves, road works or pedestrian crossings for guiding, warning or controlling traffic, e.g. delineator posts or milestones
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission

Definitions

  • the invention relates to the technical field of intelligent transportation, and specifically provides an unattended road condition early warning system and method.
  • the invention patent application number 201720505133.3 discloses an urban tunnel flood warning device, which is equipped with a processor, a flood sensor, a sound and light alarm and a barrier; When the tunnel water level reaches the safe water level line, the flooding sensor sends out a signal to alarm by the sound and light alarm, and the barriers are closed, so that vehicles cannot enter the tunnel and ensure the safety of personnel.
  • the above-mentioned patented technology still has a big defect, that is, when heavy rainfall occurs and there is water in the tunnel but the water has not reached the safe water level, and at this time, if there is a traffic jam in the tunnel, the water is not When the safe water level is reached, the alarm does not alarm, and the barrier is not closed. Vehicles outside the tunnel continuously enter the tunnel and are blocked. As the rainfall continues, the accumulated water in the tunnel will accumulate deeper and deeper. The vehicles inside bring great safety hazards.
  • the purpose of the present invention is to overcome the above-mentioned defects and provide an unattended road condition early warning system and method.
  • an unattended road condition early warning system including several sets of infrared sensors arranged in the tunnel, a water level monitoring device arranged in the tunnel, and a warning device arranged at the entrance of the tunnel , And a processing system that is electrically connected with infrared on-beam sensors, water level monitoring devices and warning devices.
  • the water level monitoring device includes an installation pole installed in the tunnel, a first water level sensor installed on the installation pole, and a second water level sensor installed on the installation pole and located above the first water level sensor; Both the water level sensor and the second water level sensor are electrically connected to the processing system.
  • the water level monitoring device also includes a protection device arranged on the outside of the mounting rod; the protection device includes an outer cylinder with an opening, a filter installed on the opening of the outer cylinder, and one end connected to the outer cylinder. A water flow channel is formed between the two adjacent partitions connected by the inner side wall of the inner wall; the partition is located between the filter screen and the mounting rod.
  • the processing system includes a main controller, a sub-controller connected to the main controller, a clock unit connected to the sub-controller, and a wireless transmission unit connected to the main controller; the alarm, the first water level sensor, and the second The water level sensors are all connected with the main controller, and the infrared through-beam sensors are connected with the sub-controller.
  • the distance between two adjacent infrared through-beam sensors is 20-50m.
  • An unattended road condition early warning method includes the following steps:
  • Step 1 Infrared through-beam sensors collect traffic flow information in the tunnel and upload it to the sub-controller; the first water level sensor and the second water level sensor collect the depth information of the accumulated water in the tunnel and upload it to the main controller;
  • Step 2 The main controller judges whether the water depth reaches the dangerous depth according to the water depth information; if yes, the main controller sends an early warning signal; if no, go to step 3;
  • Step 3 The main controller judges whether the accumulated water reaches the warning depth; if not, the main controller does not send out an early warning signal, if yes, go to step 4;
  • Step 4 The sub-controller judges whether there is a traffic jam in the tunnel based on the traffic flow information; No, the sub-controller does not send a signal to the main controller, and the main controller does not send an early warning signal; if the sub-controller sends a signal to the main controller, the main The controller sends out an early warning signal.
  • step 2 when the accumulated water exceeds the height of the second water level sensor, both the first water level sensor and the second water level sensor send signals to the main controller, and the main controller determines that the depth of the accumulated water reaches a dangerous depth.
  • step 3 when the accumulated water exceeds the height of the first water level sensor and is below the second water level sensor, the first water level sensor sends a signal to the main controller, and the main controller determines that the depth of the accumulated water reaches the warning depth.
  • step 4 when any infrared through-beam sensor continuously sends a signal to the sub-controller for more than the preset time of the clock unit, the sub-controller determines that a traffic jam occurs in the tunnel.
  • the preset time of the clock unit is 30s.
  • the present invention prompts vehicles that have not entered the tunnel by detecting the depth of the water accumulation in the tunnel and whether there is traffic jam in the tunnel; when the water accumulation reaches the first water level sensor device When there is a traffic jam in the tunnel at a certain depth, a warning is given to vehicles that have not entered the tunnel; when the accumulated water reaches the depth set by the first water level sensor and there is no traffic jam in the tunnel, the vehicle can pass through the tunnel normally; At the depth set by the second water level sensor, regardless of whether there is traffic jam in the tunnel, it will warn the vehicles that have not entered the tunnel; this can reduce the safety hazards caused by the accumulation of water in the tunnel.
  • Figure 1 is a schematic diagram of the installation of the present invention.
  • Figure 2 is a top view of the water level monitoring device of the present invention.
  • Figure 3 is a cross-sectional view of the water level monitoring device of the present invention.
  • FIG. 4 is a schematic diagram of the connection between the processing system of the present invention and the external unit.
  • Figure 5 is a flow chart of the unattended road condition early warning method of the present invention.
  • 1 Infrared on-beam sensor
  • 2 Warning device
  • 3 Fan
  • 4 Water flow channel
  • 5 Particle
  • 6 Outer cylinder
  • 7 Mounting rod
  • 8 First water level sensor
  • 9 Second water level sensor.
  • the unattended road condition early warning system of the present invention is used to reduce the hidden safety hazards to vehicles caused by the accumulation of water in the tunnel. It includes several sets of infrared through-beam sensors 1 arranged in the tunnel, and The water level monitoring device, the warning device 2 arranged at the entrance of the tunnel, and the processing system respectively electrically connected with the infrared through-beam sensor 1, the water level monitoring device and the warning device.
  • the infrared through-beam sensor 1 is used to detect whether there is a traffic jam in the tunnel. It consists of a transmitter and a receiver. The transmitter emits infrared rays to the receiver when it is working. When the vehicle passes and blocks the signal connection between the transmitter and receiver. When it is in line, the infrared through-beam sensor 1 outputs a signal to the processing system.
  • the water level monitoring device is used to monitor the depth of water accumulation in the tunnel, and the detection result is also output to the signal processing system. The signal processing system determines whether it is safe for the vehicle to pass through the tunnel. If it is unsafe, the warning device 2 warns the vehicle that has not entered the tunnel.
  • the warning device can be a horn or a display, which can be installed at the entrance of the tunnel so that the vehicle owner can see it.
  • the number of infrared through-beam sensors 1 can be set according to actual conditions or the length of the tunnel.
  • the distance between two adjacent infrared through-beam sensors 1 is 20-50m. In this embodiment, two adjacent infrared through-beam sensors 1 The spacing between the two is set to 35m.
  • the water level monitoring device includes a mounting rod 7 installed in the tunnel, a first water level sensor 8 fixed on the mounting rod 7, fixed on the mounting rod 7 and located at the first water level sensor
  • the second water level sensor 9 above 8; the first water level sensor 8 and the second water level sensor 9 are electrically connected to the processing system.
  • the water level monitoring device is installed at the lowest point in the tunnel.
  • the first water level sensor 8 and the second water level sensor 9 are both used to detect the depth of the water accumulation in the tunnel.
  • the height of the first water level sensor 8 from the ground is 10mm
  • the height of the second water level sensor from the ground is 25mm.
  • the processing system includes a main controller, a sub-controller connected to the main controller, a clock unit connected to the sub-controller, and a wireless transmission unit connected to the main controller;
  • a water level sensor 8 and a second water level sensor 9 are both connected to the main controller, and the infrared through-beam sensor 1 is connected to the sub-controller.
  • the main controller is implemented by an AT89S51 microcontroller, and the sub-controller is implemented by an AT89C51 microcontroller.
  • the clock unit is used to set the continuous signal transmission time. It can use the DS3231 clock module.
  • This embodiment is set to 30s, that is, when the infrared through-beam sensor 1 transmits a signal to the sub-controller for more than 30s, the sub-controller judges Traffic jam in the tunnel, at this time the sub-controller sends a signal to the main controller.
  • the main controller is connected to the monitoring center of the traffic control department through a wireless transmission unit, and the wireless transmission unit can adopt a zigbee wireless communication module.
  • the infrared through-beam sensor 1 detects the traffic flow in the tunnel.
  • the infrared through-beam sensor sends a signal to the sub-controller, and when the infrared through-beam sensor When the sensor continues to send a signal to the sub-controller for more than 30s, the sub-controller outputs a signal to the main controller.
  • the system determines that there is a traffic jam in the tunnel; if there is no infrared through-beam sensor, it sends a signal to the sub-controller for 30s , It means that vehicles in the tunnel are passing normally at this time and the sub-controller does not send a signal to the main controller.
  • the first water level sensor 8 and the second water level sensor 9 detect the depth of the accumulated water in the tunnel.
  • neither the first water level sensor 8 nor the second water level sensor 9 sends a signal to the main engine.
  • the controller at this time, regardless of whether the sub-controller sends a signal to the main controller, the main controller does not send a warning signal to the warning device, and the warning device does not alarm; that is, when the water is located under the first water level sensor 8, regardless of the tunnel Whether there is a traffic jam inside, vehicles outside can enter the tunnel.
  • the first water level sensor 8 sends a signal to the main controller.
  • the main controller does not Send a warning signal to the warning device, the warning device does not alarm; that is, when the water exceeds the first water level sensor 8 but does not exceed the second water level sensor 9, and there is no traffic jam in the tunnel, vehicles outside can enter the tunnel normally.
  • the first water level sensor 8 sends a signal to the main controller.
  • the main controller will Send a warning signal to the warning device, and outside vehicles are not allowed to enter the tunnel; that is, when the accumulated water exceeds the first water level sensor 8 but does not exceed the second water level sensor 9, and there is a traffic jam in the tunnel, outside vehicles are not allowed to enter the tunnel.
  • the main controller also sends a signal to the monitoring center of the traffic control department to notify the traffic control department to handle it.
  • both the first water level sensor 8 and the second water level sensor 9 send signals to the main controller.
  • the main controller The warning device sends a warning signal, the warning device gives an alarm, and vehicles outside are not allowed to enter the tunnel; that is, when the second water level sensor 9 is flooded, the tunnel has reached the warning water level and the vehicle cannot pass safely. Traffic jams do not allow vehicles to enter the tunnel.
  • the present invention can also set a gate at the entrance of the tunnel, and the gate can be closed when the warning device alarms to prevent vehicles from entering, which will not be described here.
  • the unattended road condition early warning system in this embodiment is basically the same as the unattended road condition early warning system in Embodiment 1. The difference is that the water level monitoring device of the unattended road condition early warning system in this embodiment also includes Guard device on the outside of rod 7.
  • the protective device includes an outer cylinder 6 with an opening, a filter 3 mounted on the opening of the outer cylinder 6, and a filter set in the outer cylinder 6 with one end connected to the inner side wall of the outer cylinder 6.
  • the filter screen 3 can be installed on the opening of the outer cylinder 6 by screws, which can prevent sundries from entering the outer cylinder 6; the length of the partition 5 is shorter than the length of the outer cylinder 6, and several partitions are sequentially
  • the two opposite side walls of the outer cylinder 6 are welded alternately, so that a water flow channel 4 is formed between two adjacent partitions, as shown in FIG. 2.
  • stagnant water will enter through the opening of the outer cylinder body 6 and enter the outer cylinder body along the water flow channel 4.
  • the waves caused by vehicles passing by are weakened by the partition 5 to prevent the waves from affecting the water level. The accuracy of the detection leads to false alarms.
  • This embodiment is the early warning method of the unattended road condition early warning system of embodiment 1. As shown in FIG. 5, it includes the following steps:
  • Step 1 The infrared through-beam sensor collects traffic information in the tunnel and uploads it to the sub-controller, that is, when the vehicle passes by, the connection between the transmitter and the receiving end of the infrared through-beam sensor is blocked, and the infrared through-beam sensor sends a signal To the sub-controller.
  • the first water level sensor and the second water level sensor collect the depth information of the accumulated water in the tunnel and upload it to the main controller, that is, when the first water level sensor and the second water level sensor are flooded by the accumulated water, the first water level sensor and the second water level sensor Then transmit the signal to the main controller.
  • Step 2 The main controller judges whether the water depth reaches the dangerous depth according to the water depth information; if yes, the main controller sends an early warning signal to the warning device, and the warning device starts to warn vehicles outside the tunnel and does not allow outside vehicles to enter the tunnel; no, Go to step 3. Wherein, when the accumulated water exceeds the height of the second water level sensor, both the first water level sensor and the second water level sensor send signals to the main controller, and the main controller determines that the depth of the accumulated water reaches a dangerous depth.
  • Step 3 The main controller judges whether the stagnant water reaches the warning depth; if not, the main controller does not send an early warning signal to the warning device, the warning device does not warn, and the vehicle can enter the tunnel normally; if yes, go to step 4.
  • the main controller determines that the depth of the accumulated water reaches the warning depth.
  • Step 4 The sub-controller judges whether there is a traffic jam in the tunnel based on the traffic information; if not, the sub-controller does not send a signal to the main controller, and the main controller does not send an early warning signal to the warning device, and the vehicle can enter the tunnel normally; yes, the sub-control The main controller sends a signal to the main controller, and the main controller sends an early warning signal to the alarm. The alarm starts to warn vehicles outside the tunnel and does not allow outside vehicles to enter the tunnel.
  • the sub-controller determines that a traffic jam occurs in the tunnel.
  • the preset time of the clock unit is 30s.
  • the present invention can be implemented well.

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Abstract

一种无人值守路况预警系统，包括设置在隧道内的若干组红外对射传感器（1），设置在隧道内的水位监测装置等。一种无人值守路况预警方法，包括以下步骤：步骤1：采集隧道内车流信息和隧道内积水深度信息等步骤。通过检测隧道内的积水深度及隧道内是否堵车来提示没有进入隧道内的车辆；当积水达到第一水位传感器（8）设定的深度且隧道内发出堵车现象时，对未进入隧道的车辆进行警示；当积水达到第一水位传感器（8）设定的深度而隧道内不堵车时，车辆可正常通过隧道；当积水达到第二水位传感器（9）设定的深度时，不管隧道内是否堵车，均对未进入隧道的车辆进行警示；如此则可以降低因隧道积水而带来的安全隐患。

Description

一种无人值守路况预警系统及方法 技术领域
本发明涉及智能交通技术领域，具体提供一种无人值守路况预警系统及方法。
背景技术
近年来，我国各大城市由强降雨引起的城市下穿隧道存在大量积水的现象时有发生，且有愈演愈烈的趋势。每逢大雨来袭，总有大城市变成“内海”的新闻报道，2012年7月21日北京地区特大暴雨灾害，多条隧道因积水导致交通瘫痪，更有司机因为没能在第一时间获知隧道内水位是否安全而误入隧道内，造成人员伤亡和财产损失。
为了解决上述问题，人们研发出了隧道内涝预警系统，如申请号为201720505133.3的发明专利公开了一种城市隧道内涝报警装置，其通过设置处理器、水浸传感器、声光报警器和道闸；当隧道水位到达安全水位线时，水浸传感器发出信号，使声光报警器报警，道闸关闭，从而使车辆无法进入隧道，保证人员的安全。但上述的专利技术仍然存在很大的缺陷，即当发生强降雨且隧道内已出现了积水但积水并未达到安全水位线，而此时如果隧道内发生了堵车现象，由于积水未达到安全水位线，报警器不报警、道闸未关闭，隧道外的车辆源源不断的进入到隧道内，并被堵住，随着降雨的继续，隧道内的积水越积越深，给隧道内的车辆带来极大的安全隐患。
发明内容
本发明的目的在于克服上述缺陷，提供一种无人值守路况预警系统及方法。
本发明的目的通过下述技术方案实现：一种无人值守路况预警系统，包括设置在隧道内的若干组红外对射传感器，设置在隧道内的水位监测装置，设置在隧道入口处的警示器，以及分别与红外对射传感器、水位监测装置以及警示器电连接的处理系统。
进一步的，所述水位监测装置包括安装在隧道内的安装杆，设置在安装杆 上的第一水位传感器，设置在安装杆上并位于第一水位传感器上方的第二水位传感器；所述第一水位传感器和第二水位传感器均与处理系统电连接。
所述水位监测装置还包括设置在安装杆外侧的防护装置；所述防护装置包括开设有开口的外筒体，安装在外筒体的开口上的滤网，设置在外筒体内且一端与外筒体的内侧壁连接的若干块隔板，相邻两块隔板之间形成水流通道；所述隔板位于滤网和安装杆之间。
所述处理系统包括主控制器，与主控制器连接的子控制器，与子控制器连接的时钟单元，与主控制器连接的无线传输单元；所述警示器、第一水位传感器以及第二水位传感器均与主控制器连接，所述红外对射传感器与子控制器连接。
相邻两个红外对射传感器之间的间距为20～50m。
一种无人值守路况预警方法，包括以下步骤：
步骤1：红外对射传感器采集隧道内车流信息，并上传到子控制器；第一水位传感器和第二水位传感器分别采集隧道内积水深度信息，并上传到主控制器；
步骤2：主控制器根据积水深度信息判断积水深度是否达到危险深度；是，主控制器发出预警信号；否，执行步骤3；
步骤3：主控制器判断积水是否达到警示深度；否，主控制器不发出预警信号，是，执行步骤4；
步骤4：子控制器根据车流信息判断隧道内是否发生堵车；否，子控制器不发送信号给主控制器，主控制器不发出预警信号；是，子控制器发送信号给主控制器，主控制器发出预警信号。
步骤2中当积水超过第二水位传感器的高度时，第一水位传感器和第二水位传感器均向主控制器发送信号，主控制器判定积水深度达到危险深度。
步骤3中当积水超过第一水位传感器的高度并位于第二水位传感器以下时，第一水位传感器向主控制器发送信号，主控制器判定积水深度达到警示深度。
步骤4中当任意一个红外对射传感器连续向子控制器发送信号的时间超过时钟单元预设时间时，子控制器判断隧道内发生堵车。
时钟单元预设的时间为30s。
本发明较现有技术相比，具有以下优点及有益效果：本发明通过检测隧道内的积水深度及隧道内是否堵车来提示没有进入隧道的内的车辆；当积水达到第一水位传感器设定的深度且隧道内发出堵车现象时，对未进入隧道的车辆进行警示；当积水达到第一水位传感器设定的深度而隧道内不堵车时，车辆可正常通过隧道；当积水达到第二水位传感器设定的深度时，不管隧道内是否堵车，均对未进入隧道的车辆进行警示；如此则可以降低因隧道积水而带来的安全隐患。
附图说明
图1为本发明的安装示意图。
图2为本发明的水位监测装置的俯视图。
图3为本发明的水位监测装置的剖视图。
图4为本发明的处理系统与外部单元的连接示意图。
图5为本发明的无人值守路况预警方法的流程图。
附图中的附图标记为：
1—红外对射传感器，2—警示器，3—滤网，4—水流通道，5—隔板，6—外筒体，7—安装杆，8—第一水位传感器，9—第二水位传感器。
具体实施方式
下面结合实施例对本发明作进一步地详细说明，但本发明的实施方式并不限于此。
实施例1
如图1所示，本发明的无人值守路况预警系统用于降低因隧道内积水给车辆带来安全隐患，其包括设置在隧道内的若干组红外对射传感器1，设置在隧道内的水位监测装置，设置在隧道入口处的警示器2，以及分别与红外对射传感器1、水位监测装置以及警示器电连接的处理系统。
该红外对射传感器1用于检测隧道内是否发生堵车，其由发射端和接收端组成，工作时发射端向接收端发射红外线，当车辆通过并阻断发射端与接收端 之间的信号连线时，红外对射传感器1则输出信号给处理系统。水位监测装置用于监测隧道内的积水深度，其检测结果也输出给信号处理系统，信号处理系统则判断车辆通过隧道是否安全，如果不安全则通过警示器2警示未进入隧道内的车辆。该警示器可以是喇叭或显示器，其可安装在隧道入口处，以便于车主看到。红外对射传感器1的数量可以根据实际情况或隧道的长度进行设置，相邻两个红外对射传感器1之间的间距为20～50m，本实施例中，相邻两个红外对射传感器1之间的间距设置为35m。
进一步的，如图2、3所示，该水位监测装置包括安装在隧道内的安装杆7，固定在安装杆7上的第一水位传感器8，固定在安装杆7上并位于第一水位传感器8上方的第二水位传感器9；所述第一水位传感器8和第二水位传感器9均与处理系统电连接。
水位监测装置安装于隧道内的最低处，第一水位传感8和第二水位传感器9均用于检测隧道内的积水深度，本实施例中，第一水位传感器8离地面的高度为10mm，第二水位传感器离地面的高度为25mm。
如图4所示，该处理系统包括主控制器，与主控制器连接的子控制器，与子控制器连接的时钟单元，与主控制器连接的无线传输单元；所述警示器2、第一水位传感器8以及第二水位传感器9均与主控制器连接，所述红外对射传感器1与子控制器连接。
本实施例中，主控制器采用AT89S51单片机来实现，子控制器则采用AT89C51单片机来实现。时钟单元用于设定信号连续传输时长，其可采用DS3231时钟模块，本实施例设定为30s，即当红外对射传感器1向子控制器传输信号并持续30s以上时，子控制器则判断隧道内堵车，此时子控制器则发送信号给主控制器。该主控制器通过无线传输单元与交管部门的监控中心连接，无线传输单元可采用zigbee无线通讯模块。
工作时，红外对射传感器1检测隧道内的车流，当任意一个红外对射传感器1的红外线信号被车辆阻断时，该红外对射传感器则发送信号给子控制器，且当该红外对射传感器持续发送信号给子控制器的时间达到30s以上时，子控制 器则输出信号给主控制器，此时系统判定隧道内出现堵车现象；如果没有红外对射传感器持续30s发送信号给子控制器，则说明此时隧道内车辆正常通行，子控制器不发送信号给主控制器。
同时，第一水位传感器8和第二水位传感器9检测隧道内的积水深度，当积水位于第一水位传感器8下方时，第一水位传感器8和第二水位传感器9均不发送信号给主控制器，此时不管子控制器是否有发送信号给主控制器，主控制器都不向警示器发送警示信号，警示器不报警；即当积水位于第一水位传感器8下方时，不管隧道内是否堵车，外面车辆均可进入隧道。
当积水淹没第一水位传感器8而没有淹没第二水位传感器9时，第一水位传感器8则向主控制器发送信号，此时如果子控制器没有发送信号给主控制器，主控制器不向警示器发送警示信号，警示器不报警；即当积水超过第一水位传感器8而没有超过第二水位传感器9，且隧道内没有堵车时，外面车辆可正常进入隧道。
当积水淹没第一水位传感器8而没有淹没第二水位传感器9时，第一水位传感器8则向主控制器发送信号，此时如果子控制器也发送信号给主控制器，主控制器则向警示器发送警示信号，外面车辆则不允许进入隧道；即当积水超过第一水位传感器8而没有超过第二水位传感器9，且隧道内发生堵车时，外面车辆不允许进入隧道，如此可以降低因隧道内发生堵车而外面车辆源源不断的进入隧道，又因为降雨的继续，隧道内的积水越积越深，给隧道内的车辆带来的安全隐患。同时，主控制器还发送信号给交管部门的监控中心，通知交管部门前来处理。
当积水淹没第二水位传感器9时，第一水位传感器8和第二水位传感器9均向主控制器发送信号，此时不管子控制器是否有发送信号给主控制器，主控制器都向警示器发送警示信号，警示器报警，外面车辆则不允许进入隧道；即当积水淹没第二水位传感器9，此时隧道内已达到警示水位，车辆已无法安全通过，此时不管隧道内是否堵车，都不允许车辆进入隧道。
另外，本发明也可在隧道入口处设置闸门，在警示器报警时可关闭闸门， 防止车辆进入，在此不再陈述。
实施例2
本实施例的无人值守路况预警系统与实施例1中的无人值守路况预警系统基本相同，其不同点在于，本实施例中的无人值守路况预警系统的水位监测装置还包括设置在安装杆7外侧的防护装置。
如图2所示，该防护装置包括开设有开口的外筒体6，安装在外筒体6的开口上的滤网3，设置在外筒体6内且一端与外筒体6的内侧壁连接的若干块隔板5，相邻两块隔板5之间形成水流通道4；所述隔板5位于滤网3和安装杆7之间。具体的，滤网3可通过螺丝安装在外筒体6的开口上，其可以防止杂物进入到外筒体6内；隔板5的长度短于外筒体6的长度，若干隔板则依次交错的焊接在外筒体6的相对两个侧壁，使得相邻的两块隔块之间形成水流通道4，如图2所示。使用时，积水会从外筒体6的开口进入，并沿水流通道4进入到外筒体内部，而通过上述设计，车辆经过时牵起的波浪则由隔块5削弱，防止波浪影响水位检测的精度，进而产生误报现象。
实施例3
本实施例为实施例1的无人值守路况预警系统的预警方法，如图5所示，其包括以下步骤：
步骤1：红外对射传感器采集隧道内车流信息，并上传到子控制器，即当车辆经过时阻断红外对射传感器的发射端和接收端之间的连线，红外对射传感器则发送信号给子控制器。第一水位传感器和第二水位传感器分别采集隧道内积水深度信息，并上传到主控制器，即当积水淹没第一水位传感器和第二水位传感器时，第一水位传感器和第二水位传感器则传输信号给主控制器。
步骤2：主控制器根据积水深度信息判断积水深度是否达到危险深度；是，主控制器发出预警信号给警示器，警示器开始警示隧道外面的车辆，不允许外面车辆进入隧道；否，执行步骤3。其中，当积水超过第二水位传感器的高度时，第一水位传感器和第二水位传感器均向主控制器发送信号，此时主控制器判定积水深度达到危险深度。
步骤3：主控制器判断积水是否达到警示深度；否，主控制器不发出预警信号给警示器，警示器不警示，车辆可正常进入隧道；是，执行步骤4。其中，当积水超过第一水位传感器的高度并位于第二水位传感器以下时，第一水位传感器向主控制器发送信号，此时主控制器判定积水深度达到警示深度。
步骤4：子控制器根据车流信息判断隧道内是否发生堵车；否，子控制器不发送信号给主控制器，主控制器不发出预警信号给警示器，车辆可正常进入隧道；是，子控制器发送信号给主控制器，主控制器发出预警信号给警示器，警示器开始警示隧道外面的车辆，不允许外面车辆进入隧道。其中，当任意一个红外对射传感器连续向子控制器发送信号的时间超过时钟单元预设的时间时，子控制器则判断隧道内发生堵车。本实施例中，时钟单元预设的时间为30s。
如上所述，便可很好的实施本发明。

Claims (10)

  1. 一种无人值守路况预警系统，其特征在于：包括设置在隧道内的若干组红外对射传感器(1)，设置在隧道内的水位监测装置，设置在隧道入口处的警示器(2)，以及分别与红外对射传感器(1)、水位监测装置以及警示器(2)电连接的处理系统。
  2. 根据权利要求1所述的一种无人值守路况预警系统，其特征在于：所述水位监测装置包括安装在隧道内的安装杆(7)，设置在安装杆(7)上的第一水位传感器(8)，设置在安装杆(7)上并位于第一水位传感器(8)上方的第二水位传感器(9)；所述第一水位传感器(8)和第二水位传感器(9)均与处理系统电连接。
  3. 根据权利要求2所述的一种无人值守路况预警系统，其特征在于：所述水位监测装置还包括设置在安装杆(7)外侧的防护装置；所述防护装置包括开设有开口的外筒体(6)，安装在外筒体(6)的开口上的滤网(3)，设置在外筒体(6)内且一端与外筒体(6)的内侧壁连接的若干块隔板(5)，相邻两块隔板(5)之间形成水流通道(4)；所述隔板(5)位于滤网(3)和安装杆(7)之间。
  4. 根据权利要求2所述的一种无人值守路况预警系统，其特征在于：所述处理系统包括主控制器，与主控制器连接的子控制器，与子控制器连接的时钟单元，与主控制器连接的无线传输单元；所述警示器(2)、第一水位传感器(8)以及第二水位传感器(9)均与主控制器连接，所述红外对射传感器(1)与子控制器连接。
  5. 根据权利要求1～4任一项所述的一种无人值守路况预警系统，其特征在于：相邻两个红外对射传感器(1)之间的间距为20～50m。
  6. 一种无人值守路况预警方法，其特征在于，包括以下步骤：
    步骤1：红外对射传感器采集隧道内车流信息，并上传到子控制器；第一水位传感器和第二水位传感器分别采集隧道内积水深度信息，并上传到主控制器；
    步骤2：主控制器根据积水深度信息判断积水深度是否达到危险深度；是，主控制器发出预警信号；否，执行步骤3；
    步骤3：主控制器判断积水是否达到警示深度；否，主控制器不发出预警信号，是，执行步骤4；
    步骤4：子控制器根据车流信息判断隧道内是否发生堵车；否，子控制器不发送信号给主控制器，主控制器不发出预警信号；是，子控制器发送信号给主控制器，主控制器发出预警信号。
  7. 根据权利要求6所述的一种无人值守路况预警方法，其特征在于，步骤2中当积水超过第二水位传感器的高度时，第一水位传感器和第二水位传感器均向主控制器发送信号，主控制器判定积水深度达到危险深度。
  8. 根据权利要求6所述的一种无人值守路况预警方法，其特征在于，步骤3中当积水超过第一水位传感器的高度并位于第二水位传感器以下时，第一水位传感器向主控制器发送信号，主控制器判定积水深度达到警示深度。
  9. 根据权利要求6所述的一种无人值守路况预警方法，其特征在于，步骤4中当任意一个红外对射传感器连续向子控制器发送信号的时间超过时钟单元预设时间时，子控制器判断隧道内发生堵车。
  10. 根据权利要求9所述的一种无人值守路况预警方法，其特征在于，时钟单元预设的时间为30s。
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