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针对记录仪小型化的要求,设计了一种基于MAX10的多通道小型化记录仪;MAX10是一块内部集成了多通道AD采集功能FPGA控制芯片,所以相比传统的数据记录仪少了单独的AD转换芯片以及众多模拟开关,与普通搭载了外部AD的记录仪相比,体积缩小了接近四分之一;并且实现八路采集,采样频率为1 MHz,分辨率为4096;为了应用在一些恶劣环境下,选择用SD卡作为存储设备,存储容量为32GB;若系统被撞击损毁,只需要取出SD卡,依然能方便回收采集的数据;经过测试,记录仪的8个通道均能正常采集数据,而且在系统采集数据期间,猛烈撞击装置破坏了电路板后,将SD卡取出,依然能有效回收采集的数据。 相似文献
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用LabVIEW实现数据记录的最佳应用 总被引:1,自引:0,他引:1
介绍了基本数据记录仪、长时间数据记录仪、分布式数据记录仪、冗余数据记录仪、远程便携式数据记录仪及高速数据记录仪的功能及其应用。 相似文献
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本文介绍了以PICl6F688型低功耗单片机为控制器的温湿度记录仪的设计与实现,采用数字式传感器对温湿度进行测量,并将所测量数据实时存入外部存储器EEPROM(24L C512)中。系统采用3V锂电池供电,采集数据间隙系统处于休眠状态,降低了系统能量消耗。开始记录数据之前,采用VB设计操作软件通过计算机串口对记录仪参数(记录时间和开启记录仪方式)进行设置,测量数据时可脱离上位机单独运行。该记录仪具有稳定可靠、体积小、量化误差小、响应速度快、便于携带和适用面广等特点。 相似文献
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主要介绍了航行数据记录仪中的数据采集系统的的设计及其实现,给出了系统的硬件结构图以及软件流程。 相似文献
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文章介绍了车辆状态信息显示处理系统及cAN总线在现代客车上的应用。该系统是以AT89S52单片机 SJA1000CAN控制节点十SED1335液晶显示控制器为核心,并辅以扩展电路构成的汽车行驶记录仪。在研究、参考国内外现有行车记录仪的基础上,充分利用现代电子、计算机、传感测控等方面的技术成果,开发了新一代基于CAN总线的多功能行车记录仪。该系统不仅具有检测、超限报警等常规功能,而且具有点阵LCD中文显示功能.数据存储功能,以及控制功能。实现了更高的智能水平。 相似文献
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文章介绍了在网格技术支撑下仿真数据记录系统的设计,其中详细阐述了基于网格的仿真记录系统的系统结构设计过程、任务调度思想和方法以及存储管理.根据在实际应用中取得的资源负担界定方法.制定了节点的性能综合评定的原则,主要包对括计算资源、网络负担、存储资源在内的资源消耗程度进行相对合理的估计.采用分层决策的系统结构设计了任务调度器系统结构.在应用中解决了大规模分布式仿真系统中,记录器系统的记录负担过重以及大量记录信息有序管理的问题. 相似文献
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该文针对在广域网上,HLA仿真的数据收集过程中遇到的网络负载和修改联邦成员源码的问题,指出以往常用数据收集方案的缺点并提出了由数据记录接口、记录代理、主记录器三个部件构成的非嵌入式分布解决方案。这个方案能灵活地配置数据收集而不增加网络的流量,确保仿真的精度。并且着重论述了实现数据记录接口的非嵌入式关键技术,使该软件能满足不修改联邦成员代码就进行数据收集的要求,方便地应用于多方合作开发的大型仿真应用。 相似文献
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A data communications system has been designed to link mobile field instruments with digital I/O to a central computer or data logger. Commercially available VHF transceivers are used. The system is designed to be sufficiently flexible to provide for either parallel or serial devices and to allow the user to select whatever end-of-text characters (or number of characters of text) are demanded by the protocols of the field instrument and the computer. 相似文献
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为了实现对药品冷藏运输及配送过程中温度变化的实时记录,介绍了一种低功耗冷链温度记录仪的软硬件设计方法.温度记录仪硬件包括温度数据采集、数据读取及处理、数据存储3个部分,其功能分别由数字温度传感器STTS75、低功耗微控制器STM8L101F3,以及具有I2C和RF双接口的数据存储器M24LR64完成.软件编程采用模块化... 相似文献
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Hsieh-Ching Chen Hsin-Chieh Wu Yung-Ping Liu 《International Journal of Industrial Ergonomics》2009,39(5):790-797
This study presents a novel external device for quantifying accurately keyboard and mouse usage with a high input rate for prolonged periods. Three experimental tasks were performed to determine the effectiveness of the proposed logger. All mouse and keyboard activities were recorded simultaneously using the logger and WorkPace software. Ten university students typed on a keyboard, moved and clicked a mouse during tasks under various preset and self-selected speeds for 3 min. Computer input activities of 7 university students playing online games and 7 processing documents were recorded for 8 consecutive days. Analytical results demonstrate that the proposed external logger is more accurate than WorkPace, especially at a fast data entry speeds. The keystroke counts recorded by WorkPace were accurate only at low typing speeds. Moreover, the keystroke count recorded by WorkPace decreased by 17.6% from the logger-registered keystroke count when the typing rate was ≥4 keys/s, particularly when amalgamating with composite keystrokes. Similarly, the number of mouse clicks counted by WorkPace was 27.8% less than that counted by the logger when the click rate was ≥3.2 clicks/s. The average reduction in number of WorkPace-counted keystrokes and mouse clicks was 7.7 ± 2.0% (range [4.4%, 9.7%]) and 3.3 ± 3.3% (range [0.04%, 8.7%]), respectively, during online gaming tests, and was 4.0 ± 4.9% (range [−3.6%, 8.9%]) and 4.6 ± 4.7% (range [0.7%, 13.1%]), respectively, during document processing tests. This work demonstrates that the proposed external logger is an accurate and reliable tool for quantitatively measuring computer input activities. Further applications of the logger are discussed.
Relevance to industry
Quantitative assessment of keyboard and mouse use can help identify high-risk groups and safe duration of computer use. The proposed logger effectively measures computer input activities, thereby providing accurate data than a software-based logger in assessing computer usage. 相似文献17.
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Due to the advancement of low power miniature electronic devices, there is growing interest of physiological data sensing and recording using wireless body sensor networks. The paper presents the design of a portable physiological data logger that includes rechargeable battery, wireless radio frequency and Bluetooth connectivity, and graphical display with touch screen capability. The target application is video capsule endoscopy. Image data are logged in micro SD cards which can be easily transferred to PC or Smartphone using SD card reader, USB interface or Bluetooth wireless link. The hardware design is general and can be used in various medical or industrial applications by changing only the firmware of the microcontroller. The design is prototyped in 109 × 107 × 20 mm printed circuit board (PCB). Tests with animal tissues have been conducted to demonstrate the performance advantages of the data logger. A demonstration of wireless heart pulse monitoring and data logging is also presented. 相似文献