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Poster: Enabling computational jewelry for mHealth applications 海报:为移动健康应用程序启用计算珠宝
Andres Molina-Markham, Ronald A. Peterson, Joseph Skinner, R. Halter, Jacob M. Sorber, D. Kotz
Many of the most compelling mHealth applications are designed to enable long-term health monitoring for outpatients with chronic medical conditions, for individuals seeking to change behavior, for physicians seeking to quantify and detect behavioral aberrations for early diagnosis, for home-care providers needing to track movements of elders under their care in order to respond quickly to emergencies, or for athletes monitoring their physiology to improve performance. Developing BAHN applications that require consistent presence and strong security, without depending on a smartphone or without building lots of computation/communication resources into every BAHN device presents a critical challenge for the wide-spread adoption of mHealth technologies. The smartphone is not always with its user [1]: many people set aside their phone while at home or while driving, exercising, or bathing. According to a Pew study, a third of smartphones have been lost or stolen [2]! When the smartphone is not present, the BAHN could lose its foundation; valuable data could be lost, critical events may go unrecognized. Second, smartphones have limited means to authenticate or identify the person holding them; if the phone has been lost or stolen, an app could inappropriately disclose personal health information about the phone’s owner. Third, smartphones are general-purpose devices, not dedicated to health-related applications; it is thus more difficult to evaluate the safety and security of a system when it is sharing resources with other applications.
许多最引人注目的移动健康应用程序旨在为慢性病门诊患者、寻求改变行为的个人、寻求量化和检测行为异常以进行早期诊断的医生、需要跟踪其护理的老年人的运动以快速应对紧急情况的家庭护理提供者、或监测其生理状况以提高表现的运动员提供长期健康监测。在不依赖智能手机或不为每个BAHN设备构建大量计算/通信资源的情况下,开发需要一致存在和强大安全性的BAHN应用程序,对移动医疗技术的广泛采用提出了关键挑战。智能手机并不总是和用户在一起:许多人在家里、开车、锻炼或洗澡时把手机放在一边。根据皮尤研究中心的一项研究,三分之一的智能手机曾经丢失或被盗。如果没有智能手机,BAHN可能会失去基础;有价值的数据可能丢失,关键事件可能无法识别。其次,智能手机的身份验证或识别手段有限;如果手机丢失或被盗,应用程序可能会不恰当地泄露手机主人的个人健康信息。第三,智能手机是通用设备,并非专门用于与健康相关的应用;因此,当系统与其他应用程序共享资源时,评估系统的安全性和安全性更加困难。
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引用次数: 4
RisQ: recognizing smoking gestures with inertial sensors on a wristband RisQ:通过腕带上的惯性传感器识别吸烟手势
Abhinav Parate, Meng-Chieh Chiu, Chaniel Chadowitz, Deepak Ganesan, E. Kalogerakis
Smoking-induced diseases are known to be the leading cause of death in the United States. In this work, we design RisQ, a mobile solution that leverages a wristband containing a 9-axis inertial measurement unit to capture changes in the orientation of a person's arm, and a machine learning pipeline that processes this data to accurately detect smoking gestures and sessions in real-time. Our key innovations are four-fold: a) an arm trajectory-based method that extracts candidate hand-to-mouth gestures, b) a set of trajectory-based features to distinguish smoking gestures from confounding gestures including eating and drinking, c) a probabilistic model that analyzes sequences of hand-to-mouth gestures and infers which gestures are part of individual smoking sessions, and d) a method that leverages multiple IMUs placed on a person's body together with 3D animation of a person's arm to reduce burden of self-reports for labeled data collection. Our experiments show that our gesture recognition algorithm can detect smoking gestures with high accuracy (95.7%), precision (91%) and recall (81%). We also report a user study that demonstrates that we can accurately detect the number of smoking sessions with very few false positives over the period of a day, and that we can reliably extract the beginning and end of smoking session periods.
众所周知,在美国,吸烟引起的疾病是导致死亡的主要原因。在这项工作中,我们设计了RisQ,这是一种移动解决方案,利用包含9轴惯性测量单元的腕带来捕捉人的手臂方向的变化,以及处理这些数据以实时准确检测吸烟手势和会话的机器学习管道。我们的主要创新有四个方面:A)一种基于手臂轨迹的方法,提取候选的手对嘴手势;b)一组基于轨迹的特征,将吸烟手势与混杂的手势(包括吃和喝)区分开来;c)一个概率模型,分析手对嘴手势的序列,并推断哪些手势是个人吸烟过程的一部分;以及d)利用放置在人体上的多个imu以及人的手臂的3D动画来减轻标记数据收集的自我报告负担的方法。实验表明,我们的手势识别算法能够以较高的准确率(95.7%)、精确度(91%)和召回率(81%)检测吸烟手势。我们还报告了一项用户研究,该研究表明,我们可以准确地检测一天中吸烟的次数,并且很少有误报,而且我们可以可靠地提取吸烟时段的开始和结束。
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引用次数: 279
Demo: Kahawai: high-quality mobile gaming using GPU offload 演示:Kahawai:使用GPU卸载的高质量手机游戏
Eduardo Cuervo, A. Wolman, Landon P. Cox, Kiron Lebeck, Ali Razeen, S. Saroiu, M. Musuvathi
This paper presents Kahawai1, a system that provides high-quality gaming on mobile devices, such as tablets and smartphones, by offloading a portion of the GPU computation to server-side infrastructure. In contrast with previous thin-client approaches that require a server-side GPU to render the entire content, Kahawai uses collaborative rendering to combine the output of a mobile GPU and a server-side GPU into the displayed output. Compared to a thin client, collaborative rendering requires significantly less network bandwidth between the mobile device and the server to achieve the same visual quality and, unlike a thin client, collaborative rendering supports disconnected operation, allowing a user to play offline - albeit with reduced visual quality. Kahawai implements two separate techniques for collaborative rendering: (1) a mobile device can render each frame with reduced detail while a server sends a stream of per-frame differences to transform each frame into a high detail version, or (2) a mobile device can render a subset of the frames while a server provides the missing frames. Both techniques are compatible with the hardware-accelerated H.264 video decoders found on most modern mobile devices. We implemented a Kahawai prototype and integrated it with the idTech 4 open-source game engine, an advanced engine used by many commercial games. In our evaluation, we show that Kahawai can deliver gameplay at an acceptable frame rate, and achieve high visual quality using as little as one-sixth of the bandwidth of the conventional thin-client approach. Furthermore, a 50-person user study with our prototype shows that Kahawai can deliver the same gaming experience as a thin client under excellent network conditions.
本文介绍了Kahawai1,这是一个能够在移动设备(如平板电脑和智能手机)上提供高质量游戏的系统,通过将部分GPU计算卸载到服务器端基础设施。与之前需要服务器端GPU渲染整个内容的瘦客户端方法不同,Kahawai使用协作渲染将移动GPU和服务器端GPU的输出结合到显示的输出中。与瘦客户端相比,协作渲染在移动设备和服务器之间所需的网络带宽要少得多,才能实现相同的视觉质量。与瘦客户端不同的是,协作渲染支持断开连接的操作,允许用户离线播放——尽管视觉质量会降低。Kahawai实现了两种独立的协同渲染技术:(1)移动设备可以渲染每一帧减少细节,而服务器发送每一帧差异流,将每一帧转换为高细节版本,或者(2)移动设备可以渲染帧的子集,而服务器提供缺失的帧。这两种技术都与大多数现代移动设备上的硬件加速H.264视频解码器兼容。我们执行了一个Kahawai原型,并将其与idTech 4开源游戏引擎(许多商业游戏使用的先进引擎)整合在一起。在我们的评估中,我们表明Kahawai可以以可接受的帧速率提供游戏玩法,并使用传统瘦客户端方法的六分之一的带宽实现高视觉质量。此外,使用我们的原型进行的50人用户研究表明,Kahawai可以在良好的网络条件下提供与瘦客户机相同的游戏体验。
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引用次数: 50
Demo: Zero interaction private messaging with ZIPR 演示:零交互私有消息与ZIPR
Ali Razeen, Landon P. Cox
Messaging app developers are beginning to take the security and privacy of their users' communication more seriously. Unfortunately, a recent study has shown that the developers of many popular apps incorrectly use cryptography. As a result, they make mistakes that may result in trivially broken encryption schemes. For example, the developers of Snapchat use a constant symmetric encryption key hardcoded into the app and it only takes 12 lines of Ruby to crack the encryption. In this work, we propose ZIPR (Zero-Interaction PRivacy), a system that relieves developers from the task of using cryptography correctly. Designed for text-messaging apps, ZIPR automatically negotiates shared secret keys, and encrypts and decrypts messages as users of these apps chat with each other. No manual intervention is required by users for them to enjoy secure messaging. There are two key ideas behind ZIPR. First, most text-messaging apps follow a basic UI scheme that contains (i) a text box for users to compose their message, (ii) a "send" button which they click on to send the message, and (iii) a list view to display sent and received messages. By intercepting events on these UI elements, ZIPR can manipulate the composed message before it is sent and before it is displayed. This allows the system to transparently encrypt and decrypt message data. The second key idea is that ZIPR can reuse the communication channel defined by an app to negotiate a shared secret key between two users. This is done by piggy-backing negotiation data on the messages users send to each other. A major advantage of this approach is that ZIPR can avoid the difficult task of establishing user identities. After all, a user of a text-messaging app is likely to carry out a conversation only with someone she knows, and both of them would have signed up for the chat service using some personal data such as their email addresses or phone numbers. Developers use ZIPR by tagging UI elements; no changes to their source code are required. This is similar to HTTPS where web developers only need to configure their servers with SSL certificates to encrypt data transmission with their users. However, unlike HTTPS, the end-to-end encryption in ZIPR takes place between the two users carrying out a conversation and not between a server and a user. This ensures that even if the app servers are compromised, users' messages would remain secure. ZIPR is implemented in Android 4.3 and works with existing apps with very few modifications. In this demo, we show that our current prototype works with several apps including Whatsapp, Facebook Messenger, and Skype. These apps required only four, five, and three lines of modification to their UI XML definition files, respectively. In Figure 1, we show a screenshot of Whatsapp running under ZIPR. In the first two messages exchanged between the users, a new shared secret key is negotiated. Subsequently, all following messages are securely transmitted, and these encrypted
即时通讯应用开发商开始更加重视用户通信的安全和隐私。不幸的是,最近的一项研究表明,许多流行应用程序的开发人员错误地使用了加密技术。因此,他们犯的错误可能会导致加密方案的轻微破坏。例如,Snapchat的开发者使用了一个固定的对称加密密钥硬编码到应用程序中,只需要12行Ruby代码就可以破解加密。在这项工作中,我们提出了ZIPR(零交互隐私),这是一个将开发人员从正确使用加密的任务中解脱出来的系统。ZIPR专为短信应用设计,可以自动协商共享密钥,并在这些应用的用户彼此聊天时对信息进行加密和解密。用户不需要人工干预就可以享受安全的消息传递。ZIPR背后有两个关键思想。首先,大多数短信应用程序都遵循一个基本的UI方案,其中包含(i)用户撰写信息的文本框,(ii)用户点击发送信息的“发送”按钮,以及(iii)显示发送和接收信息的列表视图。通过拦截这些UI元素上的事件,ZIPR可以在组合消息发送和显示之前对其进行操作。这允许系统透明地加密和解密消息数据。第二个关键思想是,ZIPR可以重用应用程序定义的通信通道,以便在两个用户之间协商共享密钥。这是通过在用户相互发送的消息上附带协商数据来实现的。这种方法的一个主要优点是ZIPR可以避免建立用户身份的困难任务。毕竟,短信应用程序的用户可能只会与她认识的人进行对话,而且他们都可能使用一些个人数据(如电子邮件地址或电话号码)注册了聊天服务。开发者通过标记UI元素来使用ZIPR;不需要更改它们的源代码。这类似于HTTPS, web开发人员只需要用SSL证书配置他们的服务器来加密与用户之间的数据传输。然而,与HTTPS不同的是,ZIPR中的端到端加密发生在执行会话的两个用户之间,而不是在服务器和用户之间。这确保了即使应用服务器被入侵,用户的消息也会保持安全。ZIPR在Android 4.3中实现,并与现有的应用程序一起工作,只需很少的修改。在这个演示中,我们展示了我们目前的原型可以与几个应用程序一起工作,包括Whatsapp、Facebook Messenger和Skype。这些应用程序分别只需要对其UI XML定义文件进行四行、五行和三行修改。在图1中,我们显示了在ZIPR下运行的Whatsapp的屏幕截图。在用户之间交换的前两条消息中,协商一个新的共享密钥。随后,以下所有消息都被安全传输,这些加密消息由ZIPR以“*”作为前缀。我们目前正在扩展我们的原型,以使用Android Keystore API和TrustZone硬件来允许用户识别MitM攻击,并安全地存储密钥。我们还将Viber等其他通讯应用程序移植到ZIPR上。
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引用次数: 2
Poster: A virtual sensing framework for mobile phones 海报:移动电话的虚拟传感框架
J. Hammer, Tingxin Yan
This work presents a virtual sensing framework by exploiting operating system events for energy efficient context inference. Specifically, we present a novel set of features that can be extracted from virtual sensors and used to infer the logical status of mobile users, such as isWorking, isSocial, and isStressful. The preliminary results indicate promising inference performance and suggest a wide range of applications of the proposed framework.
这项工作提出了一个虚拟感知框架,利用操作系统事件进行节能上下文推理。具体来说,我们提出了一组新的特征,可以从虚拟传感器中提取,并用于推断移动用户的逻辑状态,如工作状态、社交状态和压力状态。初步结果表明,该框架具有良好的推理性能,具有广泛的应用前景。
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引用次数: 6
Poster: A robust vehicular accident detection system using inexpensive portable devices 海报:一个强大的车辆事故检测系统,使用廉价的便携式设备
Nicholas Capurso, Eric Elsken, Donnell Payne, Liran Ma
In the event of a vehicular accident, there are many scenarios in which the occupants become incapacitated and unable to call for assistance. Currently, there exist systems such as OnStar [1] that provides accident detection and roadside assistance services. However, the cost of these proprietary systems and their availability for all vehicular models limit their use. We propose an inexpensive and robust system that provides accurate accident detection and emergency responder notification as our senior capstone project at Texas Christian University. The proposed system contains three primary components: a smartphone, a single-on-board computer (the Raspberry Pi [2]), and Texas Instruments SensorTags [3] as shown in Figure 1.
在发生车辆事故的情况下,在许多情况下,乘员变得丧失行为能力,无法呼叫援助。目前,已有诸如OnStar[1]等系统提供事故检测和路边援助服务。然而,这些专有系统的成本和所有车型的可用性限制了它们的使用。我们提出了一个廉价和强大的系统,提供准确的事故检测和应急响应通知作为我们在德克萨斯基督教大学的高级顶点项目。所提出的系统包含三个主要组件:智能手机,单板计算机(树莓派[2])和德州仪器传感器标签[3],如图1所示。
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引用次数: 8
Poster: Improving efficiency of metropolitan-scale transit systems with multi-mode data feeds 海报:通过多模式数据馈送提高大都市规模交通系统的效率
Desheng Zhang, T. He
Urban transit systems play a significant role in preventing daily commutes from becoming more congested than they are now, e.g., transit systems reduced 865 million hours of travel delay and 450 million gallons of gas during U.S. commutes in 2013. However, the previous theory and practice on urban transit research have typically focused on individual transit modes in isolation, and thus there is a lack of research on how to integrate real-time data feeds about different transit modes (e.g., taxicab, bus and subway) and other urban infrastructures (e.g., cellular networks) to improve transit efficiency. To address this issue, we propose and implement a novel architecture for multi-mode transit services based on the urban infrastructures in a Chinese city Shenzhen. The key contributions of this poster are as follows.
城市交通系统在防止日常通勤变得比现在更加拥挤方面发挥着重要作用,例如,2013年美国交通系统减少了8.65亿小时的旅行延误和4.5亿加仑的汽油。然而,以往城市交通研究的理论和实践通常是孤立地关注单个交通方式,因此缺乏对如何整合不同交通方式(如出租车、公共汽车和地铁)和其他城市基础设施(如蜂窝网络)的实时数据馈送以提高交通效率的研究。为了解决这一问题,我们提出并实现了一种基于中国城市深圳城市基础设施的新型多模式交通服务架构。这张海报的主要贡献如下。
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引用次数: 0
Demo: Hand-to-hand communication using smartphones 演示:使用智能手机进行手对手通信
K. Murase, Ryo Kanaoka, N. Thepvilojanapong, Tsubasa Ito, T. Leppänen, H. Saito, Y. Tobe
We study an instant messaging system between two smartphones, without the need of visually following the screen of the smartphones. In the sending side, a Morse-code-type touchscreen input is used to encode the message and a vibration in the receiver side to perceive the message.
我们研究了两个智能手机之间的即时通讯系统,而不需要视觉上跟随智能手机的屏幕。在发送端,使用莫尔斯码类型的触摸屏输入对消息进行编码,并在接收端使用振动来感知消息。
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引用次数: 0
Video: Remote sensor placement 视频:远程传感器的放置
D. Mascarenas, Logan Ott, Aaron Curtis, S. Brambilla, A. Larson, S. Brumby, C. Farrar
The goal of this work is to develop a new autonomous capability for remotely deploying precisely located sensor nodes without damaging the sensor nodes in the process. Over the course of the last decade there has been significant interest in research to deploy sensor networks. This research is driven by the fact that the costs associated with installing sensor networks can be very high. In order to rapidly deploy sensor networks consisting of large numbers of sensor nodes, alternative techniques must be developed to place the sensor nodes in the field. To date much of the research on sensor network deployment has focused on strategies that involve the random dispersion of sensor nodes [1]. In addition other researchers have investigated deployment strategies utilizing small unmanned aerial helicopters for dropping sensor networks from the air. [2]. The problem with these strategies is that often sensor nodes need to be very precisely located for their measurements to be of any use. The reason for this could be that the sensor being used only have limited range, or need to be properly coupled to the environment which they are sensing. The problem with simply dropping sensor nodes is that for many applications it is necessary to deploy sensor nodes horizontally. In addition, to properly install many types of sensors, the sensor must assume a specific pose relative to the object being measured. In order to address these challenges we are currently developing a technology to remotely and rapidly deploy precisely located sensor nodes. The remote sensor placement device being developed can be described as an intelligent gas gun (Figure 1). A laser rangefinder is used to measure the distance to a specified target sensor location. This distance is then used to estimate the amount of energy required to propel the sensor node to the target location with just enough additional energy left over to ensure the sensor node is able to attach itself to the target of interest. We are currently in the process of developing attachment mechanisms for steel, wood, fiberglass (Figure 2). In this demonstration we will perform a contained, live demo of our prototype pneumatic remote sensor placement device along with some prototype sensor attachment mechanisms we are developing.
这项工作的目标是开发一种新的自主能力,用于远程部署精确定位的传感器节点,而不会在此过程中损坏传感器节点。在过去的十年中,人们对部署传感器网络的研究产生了极大的兴趣。这项研究是由于安装传感器网络的成本可能非常高。为了快速部署由大量传感器节点组成的传感器网络,必须开发替代技术来将传感器节点放置在现场。迄今为止,许多关于传感器网络部署的研究都集中在涉及传感器节点随机分散的策略上[1]。此外,其他研究人员还研究了利用小型无人机直升机从空中投放传感器网络的部署策略。[2]。这些策略的问题是,通常需要非常精确地定位传感器节点,以使其测量有用。这样做的原因可能是所使用的传感器只有有限的范围,或者需要适当地耦合到它们所感知的环境。简单删除传感器节点的问题是,对于许多应用程序来说,必须水平部署传感器节点。此外,为了正确安装许多类型的传感器,传感器必须相对于被测量对象采取特定的姿势。为了应对这些挑战,我们目前正在开发一种远程快速部署精确定位传感器节点的技术。正在开发的远程传感器放置装置可以描述为智能气体枪(图1)。激光测距仪用于测量到指定目标传感器位置的距离。然后用这个距离来估计将传感器节点推进到目标位置所需的能量,剩余的能量刚好足够确保传感器节点能够附着在感兴趣的目标上。我们目前正在开发钢、木材、玻璃纤维的附着机制(图2)。在这个演示中,我们将对我们的原型气动远程传感器放置设备以及我们正在开发的一些原型传感器附着机制进行一个包含的现场演示。
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引用次数: 0
Demo: A remote sensor placement device for scalable and precise deployment of sensor networks 演示:用于可扩展和精确部署传感器网络的远程传感器放置设备
D. Mascarenas, Logan Ott, Aaron Curtis, S. Brambilla, A. Larson, S. Brumby, C. Farrar
The goal of this work is to develop a new autonomous capability for remotely deploying precisely located sensor nodes without damaging the sensor nodes in the process. Over the course of the last decade there has been significant interest in research to deploy sensor networks. This research is driven by the fact that the costs associated with installing sensor networks can be very high. In order to rapidly deploy sensor networks consisting of large numbers of sensor nodes, alternative techniques must be developed to place the sensor nodes in the field. The goal of this work is to develop a new autonomous capability for remotely deploying precisely located sensor nodes without damaging the sensor nodes in the process. Over the course of the last decade there has been significant interest in research to deploy sensor networks. This research is driven by the fact that the costs associated with installing sensor networks can be very high. In order to rapidly deploy sensor networks consisting of large numbers of sensor nodes, alternative techniques must be developed to place the sensor nodes in the field. To date much of the research on sensor network deployment has focused on strategies that involve the random dispersion of sensor nodes [1]. In addition other researchers have investigated deployment strategies utilizing small unmanned aerial helicopters for dropping sensor networks from the air. [2]. The problem with these strategies is that often sensor nodes need to be very precisely located for their measurements to be of any use. The reason for this could be that the sensor being used only have limited range, or need to be properly coupled to the environment which they are sensing. The problem with simply dropping sensor nodes is that for many applications it is necessary to deploy sensor nodes horizontally. In addition, to properly install many types of sensors, the sensor must assume a specific pose relative to the object being measured. In order to address these challenges we are currently developing a technology to remotely and rapidly deploy precisely located sensor nodes. The remote sensor placement device being developed can be described as an intelligent gas gun (Figure 1). A laser rangefinder is used to measure the distance to a specified target sensor location. This distance is then used to estimate the amount of energy required to propel the sensor node to the target location with just enough additional energy left over to ensure the sensor node is able to attach itself to the target of interest. We are currently in the process of developing attachment mechanisms for steel, wood, fiberglass (Figure 2). In this demonstration we will perform a contained, live demo of our prototype pneumatic remote sensor placement device along with some prototype sensor attachment mechanisms we are developing.
这项工作的目标是开发一种新的自主能力,用于远程部署精确定位的传感器节点,而不会在此过程中损坏传感器节点。在过去的十年中,人们对部署传感器网络的研究产生了极大的兴趣。这项研究是由于安装传感器网络的成本可能非常高。为了快速部署由大量传感器节点组成的传感器网络,必须开发替代技术来将传感器节点放置在现场。这项工作的目标是开发一种新的自主能力,用于远程部署精确定位的传感器节点,而不会在此过程中损坏传感器节点。在过去的十年中,人们对部署传感器网络的研究产生了极大的兴趣。这项研究是由于安装传感器网络的成本可能非常高。为了快速部署由大量传感器节点组成的传感器网络,必须开发替代技术来将传感器节点放置在现场。迄今为止,许多关于传感器网络部署的研究都集中在涉及传感器节点随机分散的策略上[1]。此外,其他研究人员还研究了利用小型无人机直升机从空中投放传感器网络的部署策略。[2]。这些策略的问题是,通常需要非常精确地定位传感器节点,以使其测量有用。这样做的原因可能是所使用的传感器只有有限的范围,或者需要适当地耦合到它们所感知的环境。简单删除传感器节点的问题是,对于许多应用程序来说,必须水平部署传感器节点。此外,为了正确安装许多类型的传感器,传感器必须相对于被测量对象采取特定的姿势。为了应对这些挑战,我们目前正在开发一种远程快速部署精确定位传感器节点的技术。正在开发的远程传感器放置装置可以描述为智能气体枪(图1)。激光测距仪用于测量到指定目标传感器位置的距离。然后用这个距离来估计将传感器节点推进到目标位置所需的能量,剩余的能量刚好足够确保传感器节点能够附着在感兴趣的目标上。我们目前正在开发钢、木材、玻璃纤维的附着机制(图2)。在这个演示中,我们将对我们的原型气动远程传感器放置设备以及我们正在开发的一些原型传感器附着机制进行一个包含的现场演示。
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引用次数: 0
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Proceedings of the 12th annual international conference on Mobile systems, applications, and services
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