基于LED光源的紫外线灭菌灯车的设计

目的:针对当前医院普遍使用的荧光紫外线灭菌灯存在的功耗大、易损坏、操作人员须在灯的照射范围内操作控制而易遭受紫外线照射等弊端,设计出节能、耐用且操作可控的紫外线灯车。方法:紫外线LED为光源达到节能效果,采用灯体球形设计增大照射范围,采用电路控制使灯车延迟开启和定时关闭。结果:LED光源大大降低了灭菌灯车的功耗,延迟开启和定时关闭客观上确保了操作人员避免不必要的紫外线照射和强制性地确保了病区灭菌达到时长的要求。结论:基于LED光源的紫外线灭菌灯车具有功耗低、寿命长、体积小、便携性强等特点和广阔的临床应用前景。

夜航探照灯车控制系统设计

设计了一种夜航探照灯车控制系统,包括主控器、数据采集/驱动板、遥控装置三部分,其中主控器用于灯车监控视频和工作参数的显示,同时接收塔台遥控装置发送的无线指令控制灯车。数据采集/驱动板包含两部分:数据采集板,用于对探照灯的工作参数进行采集,包括探照角度、工作电流和电压,且利用传感器并通过电气隔离的方法实现直流信号的高精度测量;电气驱动板,用于实现灯光和探照角度控制,采用汽车电子行业成熟稳定的控制器局域网(CAN)总线进行通信。塔台遥控装置通过2.4 GHz频段与主控器进行通信,组成星状网络控制任意一台灯车。测试表明:灯车控制系统参数测量精度保持在1%以内、通信稳定可靠、功能和性能均符合系统设计要求。

无线平面灯显调车设备“用管修”存在问题与对策探讨

分析了天津铁路分局无线平面调车设备管理、维修、使用的现状,结合实际问题提出了改进措施,并探讨了提高无线调车设备管理水平和维修质量的方法。

实行平面无线灯显调车 落实相关标准

多年以来，铁路运输始终把安全生产放在重中之重的位置，但事故却总是违背人们的意愿不断发生，而调车事故的发生必将影响调车现代化的进程。随着安全基础建设的不断深入，就铁分办（１９９８）１号文件明确指出“保证安全根本的出路在于实现安全技术装备现代化。”同时，...

LED路灯可见光通信模型的研究

针对智慧路灯及车联网的应用需求,设计了基于可见光发光二极管(LED)路灯的通信模型。首先,提出LED单路稳定和多路稳定的照度预均衡方法,并测试了预均衡接收效果。其次,根据单侧、双侧对称和双侧非对称等路灯安装方式,用朗伯特模型构造和仿真了3种路灯的空间照度分布数学模型,分析了道路近地区域的平均照度。最后,据此设计了可见光信号的车辆接收模型和LED路灯到车辆的色分多路复用(CDM)可见光通信模型,并分析了模型的信号接收波形和该模型的多径效应。

Traffic light detection and recognition in intersections based on intelligent vehicle

To ensure revulsive driving of intelligent vehicles at intersections, a method is presented to detect and recognize the traffic lights. First, the stabling siding at intersections is detected by applying Hough transformation. Then, the colors of traffic lights are detected with color space transformation. Finally, self-associative memory is used to recognize the countdown characters of the traffic lights. Test results at 20 real intersections show that the ratio of correct stabling siding recognition reaches up to 90%;and the ratios of recognition of traffic lights and divided characters are 85% and 97%, respectively. The research proves that the method is efficient for the detection of stabling siding and is robust enough to recognize the characters from images with noise and broken edges.

Compact passing algorithm for signalized intersection management based on vehicular network

To improve the traffic efficiency at signalized intersections, a compact passing algorithm is proposed based on a vehicular network. Its basic principle is that several waiting vehicles after the stop line of the considered intersection should simultaneously start in green periods. Thus, more vehicles can pass the intersection in a green period. Then, the having passed vehicles should follow the planned trajectories to enlarge their longitudinal clearances. Phase timing is not considered in the compact passing algorithm, and therefore, the proposed compact passing algorithm can be combined with other algorithms on phase timing to further improve their performances. Several simulations were designed and performed to verify the performance of the proposed algorithm. The simulation results show that the proposed algorithm can increase the number of completed vehicles and decrease the travel time in the signalized intersections managed by fixed-time and vehicle actuated algorithms, which indicates that the proposed algorithm is effective for improving the traffic efficiency at common signalized intersections.

Long-term kinematics and mechanism of a deep-seated slow-moving debris slide near Wudongde hydropower station in Southwest China

Long-term kinematic research of slow- moving debris slide is rare despite of the widespread global distribution of this kind. This paper presents a study of the kinematics and mechanism of the Jinpingzi debris slide located on the Jinsha river bank in southwest China. This debris slide is known to have a volume of 27×106 ms in active state for at least one century. Field survey and geotechnical investigation were carried out to define the structure of the landslide. The physical and mechanical properties of the landslide materials were obtained by in-situ and laboratory tests. Additionally, surface and subsurface displacements, as well as groundwater level fluctuations, were monitored since 2005. Movement features, especially the response of the landslide movement to rainfall, were analysed. Relationships between resisting forces and driving forces were analysed by using the limit equilibrium method assuming rigid-plastic frictional slip. The results confirmed a viscous comoonent in the long-term continuous movement resulting in the quasioverconsolidated state of the slip zone with higher strength parameters than some other types of slowmoving landslides. Both surface and subsurface displacements showed an advancing pattern by the straight outwardly inclined （rather than gently or reversely inclined） slip zone, which resulted in low resistance to the entire sliding mass. The average surface displacement rate from 2005 to 2016 was estimated to be 0.19-0.87 mm/d. Basal sliding on the silty clay seam accounted for most of the deformation with different degrees of internal deformation in different parts. Rainfall was the predominant factor affecting the kinematics of Jinpingzi landslide while the role of groundwater level, though positive, was not significant. The response of the groundwater level to rainfall infiltration was not apparent. Unlike some shallow slow-moving earth flows or mudslides, whose behaviors are directly related to the phreatic groundwater level, the mechanism for Jinpingzi landslide kinematics is more likely related to the changing weight of the sliding mass and the downslope seepage pressure in the shallow soil mass resulting from rainfall events.

Recognition algorithm for turn light of front vehicle

Intelligent vehicle needs the turn light information of front vehicles to make decisions in autonomous navigation. A recognition algorithm was designed to get information of turn light. Approximated center segmentation method was designed to divide the front vehicle image into two parts by using geometry information. The number of remained pixels of vehicle image which was filtered by the morphologic feaatres was got by adaptive threshold method, and it was applied to recognizing the lights flashing. The experimental results show that the algorithm can not only distinguish the two turn lights of vehicle but also recognize the information of them. The algorithm is quiet effective, robust and satisfactory in real-time performance.

Cellular Automata Model for a Specific Traffic Regime and 1/f Noise

We examine the traffic lights regime to enable the fastest overall approach to a city for a specific case. The case involves a traffic light where one continues on the main road, into which additional cars are entering at the light. At this intersection an alternative route begins, which is longer but into which no additional cars are entering. To keep the total number of vehicles constant, we subtract on the main road far from the intersection, the same number of cars as were added at the intersection. In addition to checking different densities we check also the influence of changes in the number of cars which were added. We calculate the Fourier transform of the average on each traffic light cycles of the velocity on the main road and bypass. We obtained different results for different cases. All the cases can be written as 1/fa .

故障咨询与回复

★五十铃车ABS和手制动灯常亮咨询内容:一辆1994年款五十铃ISUZU RODEO(2.8L)乘用车来我厂维修,其故障现象为:当踩制动踏板起动发动机时,ABS及手制动指示灯不会亮,但当松开制动踏板时,则ABS灯及制动灯就会亮起。如不踩制动踏板起动发动机,ABS灯及手制动灯就会常亮。请问如何解决。回复:根据你描述的现象,故障原因很可能是ABS ECU不良。对于1994年款的五十铃ISUZURODEO(2.8L)乘用车来说。