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检测光栅在驾照考场变现监测的应用

2017/12/21 10:38:20      点击:

    光电传感器是一种感应其接收的光强度变化的电子器件,包含光学系统、放大器和开关量输出装置。所有光电传感器都使用调制光以排除周围光源可能的影响,工作时,光电传感器发射光线,当被检测物体经过时,根据检测模式的不同,物体或吸收光线或将光线反射到光电传感器的收光器,从而导致收光器接收的光线强度产生变化,其变化值触发开关信号输出,实现检测功能。

   测量光幕是一种特殊的光电传感器,与普通的对射式光电传感器一样,包含相互分离且相对放置的发射器和收光器两部分,但其外形尺寸较大,为长管状。测量光幕发射器产生的检测光线并非如普通传感器般只有一束,而是沿长度方向定间距生成光线阵列,形成一个“光幕”,以一种扫描的方式,配合控制器及其软件,实现监控和测量物体外形尺寸的功能。

   光幕测量系统要正常工作需配备一个控制器,控制器使用软件进行编程设定,可提供多种扫描模式和检测分析模式,而且可通过串行接口与PLC或计算机进行通讯,传递控制或扫描结果,另外还可接入触发信号控制扫描过程。

    产品配置:1.发射器和接收器:发射器内置线性排列的高能量发光元件,接收器内置与发射器数量相同的接受元件,发射器和接收器的对应光电元件依次按顺序同步触发,检测光路是否导通,当汽车通过扫描区域时,部分或全部光束被遮挡,因而被检测出。

               2.控制单元:调取并处理发射器/接收器的同步扫描信号,同时检测光幕工作状态,提供多种输出信号,如:开关量输出、串口输出或模拟量输出。考虑到系统的可靠性和安装的简便性,市场上普遍使用的车辆分离光幕都是控制器内置的两箱式产品,而没有独立的外置控制器。

               3.电缆线:连接发射器/接收器与控制器的接插电缆,一般长度为5—10m。

               4.防护外罩:为不锈钢或铝合金材料,为分离器提供防护,内置电加热玻璃、温度控制器、湿度控制器,在湿度过高、温度过低时实现自动加热,以保证车辆分离器在潮湿地区、雨雪天气、寒冷季节可靠使用。

产品特点:1.集成化设计、无需控制器,简单易用;

               2.光幕高度:50mm到2840mm;

               3.光轴间距:10、14、20、25、30、40、80mm七种,其他间距可以定做;

               4.检测距离:0—5米,0—10米;

               5.LED指示灯可显示光幕的工作状态及故障状态;

               6.双NPN输出:#输出1:车辆检测信号输出;#输出2:光幕故障报警输出;

               7.运用独特算法,使光幕只检测150mm以上的物体,同时具有1mm的分辨率,既可以避免由阳光、飞、鸟、蚊虫及污泥引起的误动作,也可以可靠检测车辆挂钩;

               8.自动检测故障,并忽略(屏蔽)有问题的光束,仍能保持正常工作,同时输出报警信号;

               9.使用高能量、高穿透率光电管,便于安装维护;

              10.可以实现车辆自动分离、计数、存在检测、分类检测、确定车头时距;

              11.完全消除跟车现象,将半挂车、全挂车、单车可靠分离;

              12.专用防护外壳使用坚固的铝型材制成,保证车辆分类光幕可靠用于室外的恶劣环境;

              13.适用温度:-10℃—55℃;环境湿度:RH≤85%(20℃)

DQSM series vehicle separation screen:
Product configuration: 1. transmitter and receiver: high energy light emitter built-in linear array, the same number of built-in receiver receiving element and corresponding transmitter, photoelectric element transmitter and receiver are orderly synchronized trigger detection optical path is switched on, when the car passes through the scanning area, all or part of beam is blocked, so it is detect.
                               2. control unit: synchronous scanning signal processing and retrieval of transmitter / receiver, and inspection work, to provide a variety of output signals, such as switch output, serial output or analog output. Considering the simplicity and reliability of the installed systems, vehicle separation screen is widely used on the market are two box products built-in controller, without external controller independent.
                               3. cable: connect the transmitter / receiver and controller connector cable, the general length is 5 - 10m.
                               4. the protection cover is stainless steel or Aluminum Alloy materials, to provide protection for the separator, a built-in electric heating glass, temperature controller and humidity controller, the humidity is too high, too low temperature of automatic heating, to ensure that vehicles separator in humid areas, rain and snow, cold season and reliable.
Features: 1. integrated design, no controller, easy to use;
              2. screen height: 50mm to 2840mm;
              3. optical axis spacing: 10, 14, 20, 25, 30, 40, 80mm seven kinds, other spacing can be made to order;
              4. detection distance: 0 - 5 meters, 0 - 10 meters;
              5.LED indicator shows the working state and fault state of the screen;
              6. double NPN output: # output 1: vehicle detection signal output; output: 2 # screen fault alarm output;
              7. the use of the unique algorithm, the screen only detected more than 150mm objects, with a resolution of 1mm, which can be avoided by the sun, bird, fly, mosquito and sludge caused by misoperation, can reliably detect vehicle hook;
              8. automatically detect faults and ignore (shielded) problematic light beams that still function properly while outputting an alarm signal;
              9. use high energy and high penetration photoelectric tube for easy installation and maintenance;
             10. automatic separation, counting, detection, classification and determination of vehicle headway can be realized;
             11. completely eliminate car following phenomenon, the semi-trailer, full trailer, bicycle reliable separation;
             12. special protective shell using aluminum made of sturdy, reliable guarantee for vehicle classification screen to the harsh outdoor environment;
Suitable temperature: -10 13. C and 55 C; humidity: RH = 85% (20 C)