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<正>地面自动气象站传感器的维护和保障关系到自动气象站能否正常运转并发挥精准监测作用。本文重点对突泉县地面自动气象站气压传感器、温湿度传感器、雨量传感器和风向风速传感器的维护和保障工作进行总结,并为本地的气象维护工作带来积极的促进作用。自动气象站是指在某一地区根据需要建设的能够自动探测多个要素,无需人工干预,即可自动生成报文,定时向中心站传输探测数据的气象站,它由气象传感器、微电脑 相似文献
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在气象要素观测及地面气象探测设备维修保障过程中,经常需要采集处理各类气象传感器输出信号,而自动气象站传感器种类多样,同类传感器型号不同输出信号也有差异,本文针对常用自动气象站传感器设计了一种能够支持多型号,具有数据采集、智能处理的自动气象站传感器采集系统,该系统以STM32为核心处理器,信号测量的准确度指标达到较高水平。文章从该系统的研究背景、研究方法、功能特点,设计方案与原理等方面进行了叙述。 相似文献
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自动气象站常见故障原因分析与排除措施 总被引:2,自引:2,他引:0
通过对自动气象站传感器和主控计算机的常见故障原因进行分析,提出了相应的故障排除和日常维护方法,以期促进自动气象站的正常运行。 相似文献
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DZZ6型新型自动气象站逐步推广使用于地面观测业务,从其构成、采集器和各传感器的特点出发,利用对比分析的方法,分析其相对于CAWS600型自动气象站的优越性:一是在硬件结构、处理存储能力等方面比CAWS600型自动气象站有较大提升;二是有较强大的终端操作功能;三是GPS授时器对时提高了时钟观测准确度,主采集器的多种存储途径有效保证了数据的完整性和可靠性;四是分采集器的设计满足我国地面观测业务当前和未来一段时间的发展需要;五是湿度传感器、大型蒸发传感器准确度有所提高,风向风速传感器减少了在高寒地区或寒冷天气使用时缺测情况的发生。在日常工作中仍需加强仪器维护,才能保证DZZ6型新型自动气象站长期稳定运行。 相似文献
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自动气象站仪器故障的分析处理 总被引:3,自引:2,他引:1
通过实例对自动气象站采集器、温湿传感器、风传感器、地温传感器和雨量传感器出现故障时的情况进行分析,以为气象站观测员的日常工作提供指导。 相似文献
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自动气象站投入多伦县气象观测以后,逐步替代了人工观测,标志着多伦县大气监测已步入自动化工作模式。自动气象站需要定期的维护,其硬件故障会影响到气象观测的精度,需制定出合理的故障检测流程。本文就此探讨了自动气象站硬件故障的总检测流程,分别分析了通讯设备、传感器、地温、电源系统及采集器故障的检测流程。 相似文献
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A prototype system was developed and constructed for automating the measurement and recording of canopy-, soil-, and air temperature, and soil moisture status in cropped fields. The system consists of a microcontroller-based circuit with solid-state components for handling clock/calendar, sensor power, and data storage and retrieval functions. Sensors, including an analog soil moisture sensor, analog and digital temperature sensors, and a digital infrared thermometer, are widely available and inexpensive. The circuit board and sensor assemblies require approximately 4 h to construct and test, and material costs totaled approximately US$84. Systems were built and tested during the 2009 growing season in a corn field to evaluate performance and suitability under local conditions. The sensors performed according to manufacturers’ specifications, with accuracies of ±0.4 °C, ±1.4 °C, and ±0.3 °C for air-, soil-, and canopy-temperature measurements, respectively. Soil moisture sensors were calibrated and provided measurements within ±2 kPa of the manufacturer's values. Reliability of data collection and storage averaged 91%, with most bad or missing data occurring during periods of inclement weather and electrostatic interference. 相似文献
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针对茶园土壤墒情传感器布局中传感器数量过多、数据冗余度过大的问题,采用改进的K-medoids方法,优化茶园土壤墒情传感器使用数量及部署位置。在保证茶园传感网络全覆盖的基础上,实时采集各传感节点数据;构造各传感器在不同天气条件下的时间序列数据,并运用三次样条插值法拟合成连续函数;应用谱排直法定义新的时间序列数据的距离函数替换K-medoids中的欧氏距离,将聚类中心作为最终的传感器布点;随机选取位置并采集土壤相对含水率以验证聚类中心作为传感器布点的代表性。采用改进前和改进后的K-medoids方法对2018-07—2018-08(试验Ⅰ)和2020-12(试验Ⅱ)采集的土壤墒情数据进行聚类。结果表明:1)改进的K-medoids将32个传感器减少到4个,改进前后簇中心墒情值与簇均值的相对偏差,试验Ⅰ由2.85%降到1.91%,试验Ⅱ由2.01%降到1.43%;2)改进K-medoids所得聚类中心相对含水率与试验区域平均值相近,相对偏差小于2%;3)以改进的K-medoids算法所得聚类中心作为起点的布点路径长度为82.4 m,使用8个传感器,优于改进前的106.5 m和10个传感器。基于改进K-medoids的布局方法能够优化传感器的数量和位置并且在不同天气条件下均适用。 相似文献
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Hong Y. Jeon Heping ZhuRichard Derksen Edal OzkanCharles Krause 《Computers and Electronics in Agriculture》2011,75(1):213-221
Automatic variable-rate sprayers require accurate measurement of canopy size. An estimate of canopy size is made by measuring the distance to the canopy at several elevations above the ground; an ultrasonic sensor was used to determine canopy distance in this study. It is sometimes necessary to conduct spray operations during harsh operating conditions. In this study ultrasonic sensors were subjected to simulated environmental and operating conditions to determine their durability and accuracy. Conditions tested included exposure to extended cold, outdoor temperatures, cross winds, temperature change, dust clouds, travel speeds and spray cloud effects. The root mean square (RMS) error in a series of measurements of the distance to a simulated plant canopy was used to test for significant difference among treatments. After exposure to outdoor cold conditions for 4 months, the RMS error in distance measured by the ultrasonic sensor increased from 3.31 to 3.55 cm, which was not statistically significant. Neither the presence of dust cloud nor the changes in cross-wind speeds over a range from 1.5-7.5 m/s had significant effects on the mean RMS errors. Varying sensor travel speed from 0.8 to 3.0 m/s had no significant influence on sensor detection distances. Increasing ambient temperature from 16.7 to 41.6 °C reduced the detection distance by 5.0 cm. The physical location of the spray nozzle with respect to the ultrasonic sensor had a significant effect on mean RMS errors. The mean RMS errors of sensor distance measurements ranged from 2.3 to 83.0 cm. The RMS errors could be reduced to acceptable values by proper controlling the sensor/spray nozzles spacing on a sprayer. In addition, multiple-synchronized sensors were tested for their measurement stability and accuracy (due to possible cross-talk errors) when mounted on a prototype sprayer. It was found that isolating the pathway of the ultrasonic wave of each sensor reduced detecting interference between sensors during multiple sensor operation. Test methods presented herein may be useful in the design of standardized testing protocols for field use distance sensors. 相似文献
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为解决油菜田间生态环境数据采集过程中数据传送速度慢、存储量小、传感器线路铺设和调整困难的问题,设计了一种无线数据采集装置,该装置集成了带有无线模块的CC1110单片机、SHT71温湿度传感器、TSL2561照度传感器、SWR土壤水分传感器。数据接收模块与PC计算机之间采用MAX3232串行通信的方法,最终实现数据多点定时测量、节点电池供电、大量数据传送和保存的目的。 相似文献
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对几种天气现象仪自动探测到的能见度和天气现象试验结果进行了分析,并与人工记录和自动站资料进行了对比。结果表明:①几种仪器能见度的变化趋势大致相同。能见度<10.0 km时,各仪器所测能见度数值变化均较平稳,能见度>10.0 km时,各仪器所测数值波动性较大。能见度越大,仪器测量数值与人工观测能见度误差越大。②PWS100实际判断出的天气现象种类最多,对降水天气现象的把握能力较强,小时累计降雨量与人工记录和自动站数据最为接近。凯迈天气现象仪对视程障碍现象把握能力较强,与人工记录一致性较好,并且对视程障碍强度的区分能力也较强。OWI-430仅能判断降水现象,且小时累计降雨量数值误差较大。 相似文献
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对正在运行的自动气象站分别出现雨量传感器失灵,气温相对湿度异常,过程降水量与人工站雨量计测量值差值大的情况,经分析判断,总结出自动气象站的日常维护,以有效提高观测员日常维护及排除故障能力,确保观测数据的连续性、完整性. 相似文献
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针对果蔬保鲜运输中因温差过大,部分果蔬易被冻伤的问题,设计了一套基于双监测点的保鲜运输用温度控制系统.该系统以安装在厢体后端的温度传感器为主监测点,将保鲜运输中的环境温度控制在理想的保鲜温度范围内;以安装在厢体前端的温度传感器为辅助监测点,防止气流出口处的温度过低,冻伤厢体前端的果蔬.通过试验,此温度控制系统稳定性好、可靠性高,既能将运输厢内的温度控制在设定的目标温度范围内,又能防止运输厢体前端的果蔬不被冻伤.此研究结果对提升果蔬保鲜运输技术水平具有一定的参考价值. 相似文献
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