The development and character of compound temperature-humidity sensor were discussed in this study.The design of sampling,control and output unit of temperature-humidity sensor as well as their manufacture method and ...The development and character of compound temperature-humidity sensor were discussed in this study.The design of sampling,control and output unit of temperature-humidity sensor as well as their manufacture method and character were studied in detail.The relationship between components of humidity resistance materials and negative temperature coefficient ( NTC) thermistor materials in sampling unit of compound sensor and character of electrical resistance and temperature was obtained.Couples of character curves of compound temperature-humidity sensor and data of materials of sampling unit were shown in this paper too.展开更多
A novel embedded sensor network records changes in key climatic-environmental variables over a range of altitude in the BaekduDaegan Mountain （BDM） of Gangwon Province in Korea, a protected mountain region with uniq...A novel embedded sensor network records changes in key climatic-environmental variables over a range of altitude in the BaekduDaegan Mountain （BDM） of Gangwon Province in Korea, a protected mountain region with unique biodiversity undergoing climate change research. The investigated area is subdivided into three horizontal north-south study areas. Three variables, temperature （T, °C）, relative humidity （RH, %）, and light intensity （LI, lumens m-2, or lux, lx）, have been continuously measured at hourly intervals from June, 2olo to September, 2011 using HOBO H8 devices at lO fixed study sites. These hourly observations are aggregated to monthly, seasonal and annual mean values, and results are summarized to inaugurate a long-term climate change investigation. A region wide T difference in accordance with altitude, or lapse rate, over the interval is calculated as o.4°C l00 m-1. T lapse rates change seasonally, with winter lapse rates being greater than those of summer. RH is elevated in summer compared to other seasons. LI within forestland is lower during summer and higher during other seasons. The obtained results could closely relate to the vegetation type and structure and the terrain state since data loggers were located in forestland.展开更多
An ultra-longer fiber cantilever taper for simultaneous measurement of the temperature and relative humidity(RH)with high sensitivities was proposed.The structure was fabricated by using the simple and cost-effective ...An ultra-longer fiber cantilever taper for simultaneous measurement of the temperature and relative humidity(RH)with high sensitivities was proposed.The structure was fabricated by using the simple and cost-effective method only including fiber cleaving,splicing,and tapering.The length of the cantilever taper is about 1.5 mm.The dip A and dip B were measured simultaneously,owing to the ultra-long length and super-fine size,the temperature sensitivities of the dip A and dip B reached as high as 127.3 pm/℃ and 0 pm/℃ between 25℃ and 50℃,and the RH sensitivities are31.2 pm/%RH and29.2 pm/%RH with a broad RH interval ranging from 20%RH to 70%RH.Besides,the proposed structure showed good linearity in the sensing process and small temperature crosstalk.It will be found in wide applications in environmental monitoring,food processing,and industries.展开更多
文摘The development and character of compound temperature-humidity sensor were discussed in this study.The design of sampling,control and output unit of temperature-humidity sensor as well as their manufacture method and character were studied in detail.The relationship between components of humidity resistance materials and negative temperature coefficient ( NTC) thermistor materials in sampling unit of compound sensor and character of electrical resistance and temperature was obtained.Couples of character curves of compound temperature-humidity sensor and data of materials of sampling unit were shown in this paper too.
文摘A novel embedded sensor network records changes in key climatic-environmental variables over a range of altitude in the BaekduDaegan Mountain （BDM） of Gangwon Province in Korea, a protected mountain region with unique biodiversity undergoing climate change research. The investigated area is subdivided into three horizontal north-south study areas. Three variables, temperature （T, °C）, relative humidity （RH, %）, and light intensity （LI, lumens m-2, or lux, lx）, have been continuously measured at hourly intervals from June, 2olo to September, 2011 using HOBO H8 devices at lO fixed study sites. These hourly observations are aggregated to monthly, seasonal and annual mean values, and results are summarized to inaugurate a long-term climate change investigation. A region wide T difference in accordance with altitude, or lapse rate, over the interval is calculated as o.4°C l00 m-1. T lapse rates change seasonally, with winter lapse rates being greater than those of summer. RH is elevated in summer compared to other seasons. LI within forestland is lower during summer and higher during other seasons. The obtained results could closely relate to the vegetation type and structure and the terrain state since data loggers were located in forestland.
基金Project supported by the Scientific Research Project of Institutions of Higher Learning in Inner Mongolia Autonomous Region,China(Grant No.NJZY19214)the Natural Science Foundation of Inner Mongolia Autonomous Region,China(Grant No.2018MS05064)+2 种基金the Education and Teaching Research Project of Chifeng College(Grant No.JYXMY202025)the Applied Model Curriculum Construction Project of Chifeng College(Grant No.SFK20200904)the Construction Project of the Key Laboratory of Chifeng College(Grant No.CFXYZD202007).
文摘An ultra-longer fiber cantilever taper for simultaneous measurement of the temperature and relative humidity(RH)with high sensitivities was proposed.The structure was fabricated by using the simple and cost-effective method only including fiber cleaving,splicing,and tapering.The length of the cantilever taper is about 1.5 mm.The dip A and dip B were measured simultaneously,owing to the ultra-long length and super-fine size,the temperature sensitivities of the dip A and dip B reached as high as 127.3 pm/℃ and 0 pm/℃ between 25℃ and 50℃,and the RH sensitivities are31.2 pm/%RH and29.2 pm/%RH with a broad RH interval ranging from 20%RH to 70%RH.Besides,the proposed structure showed good linearity in the sensing process and small temperature crosstalk.It will be found in wide applications in environmental monitoring,food processing,and industries.
