磁感应式曲轴位置传感器的结构原理与检修

汽车曲轴位置传感器工作性能的好坏，直接影响发动机的启动性能，曲轴位置传感器故障是导致发动机不能启动的愿因之一，叙述桑塔纳2000GSi型轿车磁感应武曲轴位置传感器的结构特点及检测方法。

磁感应式曲轴位置传感器的波形分析

汽车曲轴位置传感器工作性能的好坏,直接影响发动机的启动性能,曲轴位置传感器故障是导致发动机不能启动的原因之一,叙述桑塔纳2000GSi型轿车磁感应式曲轴位置传感器的结构特点及波形分析方法。

感应式列车无线通信质量的提高——感应线架设位置的再思考

1 前言列车无线通信是这样一种设备:它管理着列车正常运行,防止在事故、灾害发生时,再发生其他事故,以及在部署抢险修复时,防止运输上发生不安全的事。本公司从1968年起,列车在都营地铁、京城电气化铁道和其它线路中都可以互相通行。由于无线通信无论在地上、地下都可以进行,因而采用了感应式列车无线通信方式(以下简称列车无线通信)。另外,该通信方式还具有可使用 LF 波的300Hz—300kHz 的低频特点。这样对即使没有使用的无线高频设备资格的用户也可以使用。

道路清障车感应式随动托举装置

针对清障车拖牵故障车上(下)坡时容易造成托臂碰撞故障车前悬部位情况而设计的一种感应式随动拖举装置,介绍了它的工作原理。

一种继电保护硬压板远方监视技术

硬压板在继电保护二次回路用于保护功能投退,为保证保护正确动作,需正确投退硬压板,由于其串联在电路中,状态不能被远方监视。本文提出了一种实现保护硬压板远方监视的方法,它无需组建专门的系统,以非接触、金属位置感应的方式获取压板的物理状态,采用光电隔离方式接入到原有的保护(测控)装置,传送到原有的监控系统,从而实现硬压板的远方监视。

矩形电磁冒口内部磁场分布实验研究

通过实验方法测定了电磁冒口内部的磁场分布规律,并分析了电源功率和感应器作用位置对其分布规律的影响。结果表明:沿Z轴方向磁感应强度呈"两端小,中间大"趋势,峰值出现在电磁冒口中心偏上位置,拐角处磁感应强度有明显叠加现象。沿X、Y轴方向的磁感应强度均由中心向端部递增,且窄边的均匀性略优于宽边;随电源功率的增加,Z向磁感应强度明显提升,但均匀性有所降低,综合考虑X、Y、Z向磁感应强度大小及均匀性,电源功率选用7.5 k W较为合理;随电磁场作用位置的上移,磁感应强度峰值位置也随之上移,但峰值大小却略有降低。为使冒口顶部形成稳定的热中心,并避免电磁力将保护渣卷入到钢液模拟物内部,可以将感应器升至距离冒口底部105 mm附近位置。

Wireless location technology and its application

Wireless location technology is used to locate,track and monitor the location of given target using devices such as the radio frequency identification(RFID) based on WiFi technology and the sensors. And such applications as long term evolution(LTE) ,wireless local area networks(WLAN) ,RFID and location based service(LBS) are essential in today's wireless communications industry. In this paper,both wireless location technology and its application are proposed,where our experimental research results and theoretical innovation are included.

Filtering algorithm and direction identification in relative position estimation based on induction loop-cable

A filtering algorithm and direction identification method are presented for the positioning system of the mid-speed maglev train. Considering the special structure of the mid-speed maglev train, the ground position estimation method is adopted for its traction system. As the train is running, the induction loop-cable receives the signal sent by the on-board antenna to detect the position and direction of the train. But the height of the on-board antenna relative to the loop-cable is highly vulnerable to the change of the suspension height and the magnetic field produced by the traction during traveling, which may lead to amplitude fluctuation of the received signal. Consequently, the position estimation may be inaccurate. Therefore, a discrete second-order nonlinear trackdifferentiator is proposed based on the boundary characteristic curves, and the new differentiator could also extract the running direction of the train for the traction system. The experimental results show that the tracking differentiator can effectively filter out the signal interference and can provide accurate direction signal.

新型检测仪器录

1．无电池式轮胎气压监控系统 日本ALPS电气公司开发成功的无电池式的轮胎气压监控系统（TMPS），通过在轮胎气阀部位的装置发出2.45GHz信号，就可监测到轮胎压力和温度，而无需电池。其电路的专利属于德国IQ-MobiL公司。整个系统除气阀之外，自重仅6kg；工作温度范围为-40℃-150℃，比电池式提高50℃；测定次数则是过去的600倍。

Development of Re-usable C＋＋ classes for Location Aware Management and Control Systems for Shipping Applications

Location aware management and location based automation are fast upcoming technologies which are facilitated by availability of reliable, accurate, and cheap global positioning systems and location based services. This paper discusses the development of C＋＋ classes, which may be used for development of software for location aware management and control, specifically in merchant shipping, so as to provide improved safety, increased automation, prevention of pollution and reducing the work burden of the crew. The GPS is used in conjunction with the regionally accessible nested global shorelines （RANGS） dataset for this purpose. The design of two main C＋＋ classes named CShorelines and CGPSInput have been discussed. A control system mandatory on all oil-tankers above 150 GRT （and few other vessels） called ODMCS has been made location aware using the novel software developed and the results obtained have been critically examined and presented.

远紫外光子计数成像探测器分辨率及计数率的优化

基于远紫外（FUV）成像光谱仪对所用光子计数成像探测器高计数率、高空间分辨率的要求,研制出使用感应电荷位置灵敏阳极的FUV波段二维光子计数成像探测器原理样机,该探测器主要由工作在脉冲计数模式下的微通道板（MCP）堆、楔条形（WSA）感应位敏阳极及相关的模拟和数据处理电路组成。感应电荷WSA阳极探测器的分辨率主要由前端模拟电路的信噪比决定,而信噪比与整形放大器的整形时间有关,整形时间越长,信噪比越高,模拟电路的输出计数率越低。测量了整形时间分别为0.25、0.5、1、2、4μs条件下探测器的分辨率及计数率,测量结果表明探测器的分辨率为3～9lp/mm,最高计数率为11～105kcounts/s,只有0.5μs整形时间放大器能满足FUV成像光谱仪对分辨率和最高计数率的要求。