Understanding IEEE 1451-Networked smart transducer interface standard - What is a smart transducer?

This article introduces the IEEE 1451 standard for networked smart transducers. It discusses the concepts of smart transducers, IEEE 1451 smart transducers, the architecture of the IEEE 1451 family of standards, application of IEEE 1451, and example implementations of the IEEE 1451 standards. In conclusion, the IEEE 1451 suite of standards provides a set of standard interfaces for networked smart transducers, helping to achieve sensor plug and play and interoperability for industry and government.     

基于IEEE 1451.2网络化智能传感器的应用研究

介绍最新的总线标准IEEE1451,该标准定义了网络适配处理器(NCAP)和智能传感器接口模型(STIM),为研究解决通用智能传感器的设计开发问题提供了一个可以共同遵循的基础,使得智能传感器的即插即用成为可能;根据IEEE1451.2模块TMI1451.2-SC平台,结合实际监控领域的要求,设计和配置了网络化智能传感器的电子数据表单(TEDS)。     

基于IEEE1451标准接口的智能传感器硬件设计

介绍了智能传感器的概念及实现方式,采用非集成化的方式,设计了智能传感器的硬件电路,叙述了智能传感器的TEDS通信。主要介绍了硬件电路设计中信号调理、模数转换、数据通信3个模块。实验证明,所提出的设计方案切实可行。     

IEEE Standard 1451 and a proposed time synchronization approach

This paper proposes enhancements for the IEEE 1451 set of standards for smart transducers. The implementation in a distributed network of the IEEE 1588 protocol to synchronize the real-time clocks included in the IEEE 1451 devices (TIMs and NCAP) that constitute the network is described in this paper, and the results obtained are presented. The measuring system uses the USB ports of the PC, which emulate the NCAP, to connect two TIMs, and the implementation in the distributed system of the IEEE 1588 protocol to synchronize the real-time clocks present in the TIMs allows trigger synchronization accuracies of several hundreds of nanoseconds.     

Survey of the intelligent and connected vehicle cybersecurity

Cyber attacks on vehicles not only cause privacy leaks and economic losses but also endanger human life and even rise to national public safety issues.Therefore,the research on the cybersecurity of intelligent and connected vehicle (ICV) has become a research hot spot.Firstly,the structural status and characteristics of the in-vehicle network (IVN) in ICV were introduced,and the challenges and constraints of cybersecurity enhancement design for IVN were also presented.Secondly,focusing on the current functional safety and cybersecurity issues of IVN,a survey of the current cybersecurity enhancement researches for IVN was conducted.Finally,according to the characteristics of the IVN structure,some important research directions and suggestions about cybersecurity problems of ICV were pointed out from the three aspects of standard construction,functional safety and cybersecurity.     

Clamp type built-in current sensor using PCB in high-voltage power modules

High reliability is required for power modules because they are increasingly demanded as key devices in an energy-saving society. However, commercially available current sensors like current transformers and Rogowski coils are still of large size. Therefore, it is impossible to measure the current in small parts. In addition, long wiring with large sensors reduces the performance of power modules. In previous studies, we proposed a current sensor of PCB Rogowski coil with a fishbone pattern. The sensor is sufficiently small and thin with high accuracy for power module application. The PCB current sensor can be used as a built-in current sensor in power modules from the viewpoint of size. However, the sensor requires further improvement to be attached to bonding wire from a usability perspective.We propose a new pattern for the clamp-type PCB sensor and fabricate the PCB sensor as a built-in sensor in a power module. With the new pattern, it is possible to move and widen the gap for clamping. The signal error is small even though the sensor is inclinedly attached to the bonding wire. The accuracy is confirmed by a comparison between the clamp-type PCB sensor in the module and a commercially available current sensor outside the module. The clamp-type PCB sensor can be applied for intelligent power modules as well as current measurement for power electronic converters.     

基于Labview和NI myRIO的智能避障小车设计

综合运用传感器监测、NI myRIO和LabVIEW技术,设计完成了基于LabVIEW和NI myRIO的具有智能和人工操控两种控制模式的智能避障小车。利用NI myRIO处理传感器采集障碍物的距离、小车移动的速度和小车前方是否存在障碍物等参数,通过板载的WiFi模块将数据传输给PC机,并由LabVIEW编写的用户界面实时动态显示和存储上述参数。测试结果表明,该系统高效灵活,具有较好的扩展性和兼容性,同时提供良好的用户操作界面,对智能车领域的发展具有重大意义。     

基于传感标签的智能家居监控管理系统

提出了一种智能家居监控管理系统,通过基于IEEE1451.7的有源传感标签监测各类家居信号,由内置IEEE1451.7阅读器模块的智能家居网关读取标签信息,经过智能家居网关所在网络连接到智慧城市的M2M平台,再通过平台中具体的智能家居M2M应用服务,实现对智慧城市覆盖范围内海量智能家居的统一监控管理。     

In‐Vehicle AR‐HUD System to Provide Driving‐Safety Information

Augmented reality (AR) is currently being applied actively to commercial products, and various types of intelligent AR systems combining both the Global Positioning System and computer‐vision technologies are being developed and commercialized. This paper suggests an in‐vehicle head‐up display (HUD) system that is combined with AR technology. The proposed system recognizes driving‐safety information and offers it to the driver. Unlike existing HUD systems, the system displays information registered to the driver's view and is developed for the robust recognition of obstacles under bad weather conditions. The system is composed of four modules: a ground obstacle detection module, an object decision module, an object recognition module, and a display module. The recognition ratio of the driving‐safety information obtained by the proposed AR‐HUD system is about 73%, and the system has a recognition speed of about 15 fps for both vehicles and pedestrians.     

The need for smart transducers: an aerospace test and evaluation perspective

This article deals with the use of smart transducers in the aerospace community. The use of smart sensors has the potential to reduce the cost of installing and operating test measurement systems. Aerospace Test and Evaluation (T&E) community has not fully embraced smart transducers. There are some in use, but they tend to be built to proprietary standards. The IEEE 1451 family of standards addresses the problems that face by this community as well as other transducer users.     

基于MEMS传感器的TPMS系统开发与实现

本文介绍了基于MEMS传感器的TPMS系统解决方案。文中首先讨论了压阻式MEMS气压传感器和指标参数,随后从底层芯片设计和整体系统应用方案开发不同层次,描述了该系统各个组成部分的软硬件设计和物理实现,最后给出了实际系统测试验证数据。实验结果表明,系统可以有效测量气压、温度、电池电压数据,各项指标参数满足国标GB/T26149-2010要求,可以满足安装TPMS的车辆使用需要。     

基于单片机的智能小车避障循迹系统设计

本设计是以STC89C52为核心,根据超声波等感测模块传输的路面信息,检测信号识别障碍物并及时调整小车行驶走向,实现了小车自适应行驶、避障的功能。智能小车自适应行驶的成功研究有助于智能车辆的研制与开发,同时也为交通工具的智能化发展提供了一个合理可行的方向。     

基于CAN总线的智能型温湿度采集系统设计

设计一种基于CAN总线的智能型温湿度数据在线采集系统。该系统主要由两大模块构成：现场数据采集模块和USB～CAN转换接口模块。现场数据的采集是以AT89S52单片机为核心控制单元,外接温度传感器AD590和湿度传感器HM1500,通过CAN总线控制器SJA1000将数据发送到CAN总线上;USB—CAN转换接口模块是以ATmega 162芯片为控制单元,外接FT245BM USB通信芯片及SJA1000控制器,实现USB—CAN接口转换。整个系统的终端设备为监控PC机,用户软件采用VC^＋＋语言编写,可以实现现场状态监控、上下限报警和中断接收数据管理等功能。     

基于IEEE标准的智能监测系统集成研究

文中针对综合监测系统传感器之间接口兼容及网络互操作性问题,基于IEEE1451智能传感器接口和CAN总线技术,对一款开放式、“即插即用”的智能监测系统集成研究。结合IEEE1451．2和IEEE1451．4接口标准,完成执行器模块（STIM）、TII接口电路及传感器电子数据表单（TEDS）方案的设计;基于CAN总线技术完成网络适配器（NCAP）硬件模块、容错协议和优先晋升算法的设计。节点通信实验分析表明,系统可靠性高,实时性良好。     

基于包容式结构的智能循迹小车设计

设计出一个基于包容式结构的智能循迹小车,该小车采用单片机AT89S51作为控制器。该系统主要有避障行为模块、轨线跟踪行为模块、远程控制行为以及紧急停车模块。采用红外传感器设计检测轨线模块,超声波传感器设计避障模块。对于避障行为模块,提出采用模糊控制算法进行避障。经大量实验验证该小车不仅能稳定跟踪轨线,而且能绕障碍物行走。     

智能家居主控模块的设计与实现

智能家居控制系统中众多功能相对独立的子模块里,起连接控制作用的主控模块是核心模块。为解决目前智能家居控制器功能单一、通信能力差的问题,采用分布式系统的思想,设计了主控模块的软硬件架构以及主控模块与子模块间基于CAN协议的通信方式。通过系统的通信性能和综合功能测试,表明此方案设计的主控模块工作可靠,功能丰富,在很大程度上提升了整个系统的智能程度。     

基于Multisim12的电机驱动模块设计与仿真

随着汽车工业的迅速发展,汽车智能化成为大势所趋.电机驱动模块是智能车的重要组成部分.基于探索不同频率PWM控制电机输出的目的,采用Multisim12仿真软件以B车模为研究对象,对电路的工作波形进行了仿真实验测试,给出了仿真实验方案,分析了PWM选取不同频率时电路工作波形.通过实际测试,该电机驱动模块能很好完成智能车电机驱动.     

基于STM32的智能平衡小车控制系统设计

为了满足现代智能化出行需求,提高自平衡小车控制系统的智能化水平,以STM32F103C8T6单片机作为控制核心,采用陀螺仪、加速度计和霍尔传感器分别测量小车车体的倾斜角度、加速度和速度,利用超声波测距模块检测小车与前方障碍物的距离,使用蓝牙方式连接通讯,通过单片机进行PID(比例积分微分)数据运算和处理,输出PWM(脉...     

基于ath5k网卡驱动实现的车载网IEEE802.11p协议的研究

IEEE802.11p协议标准主要用于车载网络通信,有利于推动智能交通系统的实现,因此在实际交通环境下对IEEE802.1 1p协议进行研究具有重要意义.通过修改OpenWrt路由操作系统的ath5k网卡驱动实现了IEEE802.11p协议标准,并移植到Mikrotik RouterBoard433AH路由开发板上成功运行.在此基础上,对实际道路环境下IEEE802.11p协议和IEEE802.11a协议的发送速率、丢包率等网络性能参数进行了研究测量比较.实验数据显示在多障碍物、情况复杂的实际道路环境,IEEE802.11p协议更能满足通信可靠性和有效性的要求.