共查询到20条相似文献,搜索用时 125 毫秒
1.
2.
3.
4.
周于良 《中国新技术新产品》2013,(10):119-120
变电站设备温度监测系统的设计以及运行运行实现,主要运用了传感器技术以及微处理器技术、无线通信技术等,进行变电站设备温度运行监测中,不仅能够对于变电站设备运行温度数据进行采集以及融合、传输实现,并且对于变电站设备的安全稳定运行的保障有着积极的作用和意义。本文主要从基于无线传感器网络技术的变电站设备温度监测系统的总体结构以及温度监测系统的硬件设计实现、系统软件设计等方面,进行分析论述,并对于设计实现的变电站设备温度监测系统的测试运行进行分析。 相似文献
5.
针对数据采集场合电缆连接复杂、易受电磁干扰等问题,设计了一种基于蓝牙模块进行无线传输的电机转子温度测量系统,通过PDA手持设备实现了对电机转子温度数据的测量问题。对于类似的数据测量系统的设计具有很好的借鉴意义。 相似文献
6.
采用ARM+CDMA无线传输模块的架构,设计了无线数据传输系统,实现了对血压计的血糖与血压数据的实时采集与传输,具有体积小、功耗低、数据透明传输、实时性强、易于升级维护的特点,可以广泛应用在工业、民用无线数据传输领域,特别适用于一些难于布线的地区和边远地区。 相似文献
7.
8.
文中针对污染源在线监测数据的传输,提出了一种基于移动通讯网络的GPRS无线数据传输方式,并设计了相应的污染源在线监测系统。该系统采用GPRS方式的Internet互联网接入技术,使检测数据能够在数据采集模块与上位机监控中心主机之间进行传输,在不具备有线宽带传输条件的场合下成功实现了污染源检测数据的无线传输,扩大了污染源检测的覆盖面,提高了监测效率和准确性,为监管部门对环境质量的分析、判断、追踪、执法提供了依据。 相似文献
9.
本文介绍了一种基于ZigBee技术的,由无线温度传感器网络组成的新型的通信电缆温度监测系统。该系统以低成本、低功耗无线传输芯片CC2430为核心,采用DS18820温度传感器获取温度数据,并通过计算机的软件把温度显示在计算机屏幕上。 相似文献
10.
本文阐述了基于MEMS的微型无线姿态监测系统平台,可对微型载体的姿态进行测量和远距离传输,并进行后续的姿态控制分析和误差噪声分析.系统由自行研制的MEMS方位水平仪和微型无线数据传输系统组成,MEMS方位水平仪实现微型载体的全姿态测量,俯仰角测量范围-90°~90°,滚转角测量范围-180°~180°,航向角测量范围0°~360°,测量角度误差小于0.5°,灵敏度为0.1°;数据传输单元,有效质量为35g、功耗低,体积为40x60x30mm3,误码率达到106,传输有效半径达1.5km;平台通过微型飞行器三维模拟转台,进行了对系统监控的可靠性仿真测试,数据表明MEMS微型无线监测系统可应用于对微型载体的姿态实时监测. 相似文献
11.
冷库运行管理中的节能 总被引:3,自引:0,他引:3
刘清江 《制冷与空调(四川)》2005,20(3):79-81
提出了提高冷库制冷装置效率的基本措施,诸如:提高蒸发温度、避免冷凝温度升高、热气融霜、库门维护和定期放油等几个方面,来分析冷库日常运行中的节能措施.该措施对该类企业减少能源消耗,降低生产成本具有一定的实际意义. 相似文献
12.
冷库传统用灯大多采用白炽灯,金卤灯等,耗能高,灯芯的工作温度要在800度以上,由于内外温差过大,灯泡的玻璃外罩会越来越脆,很容易一碰就破,不仅频繁更换麻烦,而且很不安全。我们舟山浩德光电科技有限公司自主研发、设计的LED电子高效冷库专用照明灯,针对冷库低温环境的特点,可以在零下40度的环境中正常工作,彻底解决冷库照明的难题。本文以我公司生产的LED冷库专用灯为例来剖析LED冷库专用灯的设计特点。 相似文献
13.
14.
Dalola S. Ferrari V. Guizzetti M. Marioli D. Sardini E. Serpelloni M. Taroni A. 《IEEE transactions on instrumentation and measurement》2009,58(5):1471-1478
In this paper, an autonomous sensor system, with low-power electronics for radio-frequency (RF) communication, incorporating a thermoelectric energy-harvesting module for unattended operation is presented. A target application is proposed for temperature measurement of walled-in pipes. When the autonomous sensor is placed on the heat source, a thermoelectric module harvests energy, powering the autonomous sensor. In this condition, no external power source is necessary, the temperature measurement is performed, and the data are saved into a nonvolatile memory. When the external readout unit is active, the electromagnetic field is used to power the autonomous sensor system and to communicate the data. An experimental setup has been arranged and characterized by measuring the temperature along the pipe, the voltage that can be generated by thermoelectric generators, and the influence of different materials on RF communication. The temperature data of the heat source, which are collected by the autonomous sensor, are compared with that of a reference thermistor. The measurement results show good agreement between the two measured temperature data sets. The experimental data demonstrate that the autonomous system works correctly for a temperature gradient that is higher than 9degC, within a readout distance of a few centimeters. The presented autonomous sensor system can be effectively used for measurements into a close environment in which a temperature difference is present. 相似文献
15.
Chinese Internet AS-level topology 总被引:5,自引:0,他引:5
The first complete measurement of the Chinese Internet topology at the autonomous systems (AS) level based on traceroute data probed from servers of major ISPs in mainland China is presented. Both the Chinese Internet AS graph and the global Internet AS graph can be accurately reproduced by the positive-feedback preference model with the same parameters. This result suggests that the Chinese Internet preserves well the topological characteristics of the global Internet. This is the first demonstration of the Internet's topological fractality, or self-similarity, performed at the level of topology evolution modelling. 相似文献
16.
17.
18.
19.
20.
Stephen van Dulken 《World Patent Information》2000,22(4):273
This article forms part of the debate on how the provision and use of patent information is, and will continue to be, influenced by the rapidly increasing capabilities of the Internet and related information technology, together with a number of major changes in patent law around the world. Topics explored include the relationship between the low cost, limited value-added Internet services and the traditional higher cost, significantly value-added commercial database providers, the effects of the impending publication of many US applications, and the opportunities opening up as good-quality machine-generated translations are becoming more easily available. Other topics discussed include the implications of the anticipated implementation of the Community Patent Convention, the community utility model, WIPO's activities, the potential dangers of official patent office data being provided only on the Internet, and the problems of the multiple formats for data on the Internet and on CD-ROMs. The author emphasises these are personal views from his extensive experience in a major patent library. 相似文献