Research of the online monitoring in the cable trench based on wireless temperature and humidity sensor network

In wireless sensor networks, for improving the time synchronization perfromance of online monitoring and application of ZigBee protocol, a scheme is designed. For this objective, first of all, the ZigBee protocol specification is summarized, a profound analysis of the hardware abstraction architecture of TinyOS operating system is made; the advantages of the ZigBee protocol compared with the traditional radio technology are comparatively analyzed. At the same time, the node design block diagram based on CC2430 and related development system is provided. In the TinyOS2.x operating system, we analyze CC2430 application program abstract architecture, and on this basis, give the realization process of program design. The research results showed that we achieve an on-line monitoring system based on ZigBee protocol, which has realistic significance of applying ZigBee protocol in wireless sensor network of electrical equipment online monitoring. Based on the above research, it is concluded that the online monitoring system can collect the temperature parameters of the monitored object in real time that it can be widely applied in wireless sensor networks.

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Temperature and Humidity Sensor Research Based on Monobus Technology

Proceedings of the 2015 4th National Conference on Electrical, Electronics and Computer Engineering ◽

10.2991/nceece-15.2016.31 ◽

2016 ◽

Cited By ~ 1

Author(s):

QingXiu Wu ◽

GuoFang Zhang ◽

LiLi Yan

Keyword(s):

Humidity Sensor ◽

Temperature And Humidity

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COLOR CONTROL OF THE DEVICE WITH LED TAPE ON THE VALUE OF TEMPERATURE AND HUMIDITY OF AIR

Spravochnik Inzhenernyi zhurnal ◽

10.14489/hb.2021.05.pp.053-056 ◽

2021 ◽

pp. 53-56

Author(s):

O. Yu. Kovalenko ◽

M. D. Rybko ◽

S. A. Mikaeva ◽

Yu. A. Zhuravleva

Keyword(s):

High Temperatures ◽

Power Supply ◽

Flash Memory ◽

Humidity Sensor ◽

Voltage Regulator ◽

Lighting Device ◽

Temperature And Humidity ◽

Color Control ◽

Avr Microcontroller

The work is devoted to the development of a lighting device with control of the color of the LED strip depending on the value of temperature and humidity. To develop a prototype of a lighting installation, an A-Star 32U4 Micro microcontroller (analogue of Arduino Micro), 2 pieces of RGB tape of 5 and 10 cm each, a DHT11 temperature and humidity sensor, connecting wires, a case were purchased. The A-Star 32U4 Micro microcontroller used in the proposed setup is a universal programmable module based on the ATmega32U4 AVR microcontroller from Microchip (formerly Atmel), which has 32KB flash memory, 2.5KB RAM, and builtin USB functionality. A voltage regulator and power selection circuitry allows the board to be powered from either USB or an external 5.5V to 15V supply, while a resettable PTC fuse on the USB VBUS power supply and reverse protection on the VIN help protect it from accidental damage. In the course of the work, studies were carried out on the operation of the installation under normal conditions and at low and high temperatures.

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Wireless Sensor Network for Temperature and Humidity Monitoring Systems Based on NodeMCU ESP8266

Communications in Computer and Information Science - Advances in Cyber Security ◽

10.1007/978-981-15-2693-0_19 ◽

2020 ◽

pp. 262-273

Author(s):

Wong G. Shun ◽

W. Mariam W. Muda ◽

W. Hafiza W. Hassan ◽

A. Z. Annuar

Keyword(s):

Wireless Sensor Network ◽

Sensor Network ◽

Wireless Sensor ◽

Monitoring Systems ◽

Temperature And Humidity ◽

Humidity Monitoring

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Fluorinated Polyimide-Film Based Temperature and Humidity Sensor Utilizing Fiber Bragg Grating

Sensors ◽

10.3390/s20195469 ◽

2020 ◽

Vol 20 (19) ◽

pp. 5469

Author(s):

Xiuxiu Xu ◽

Mingming Luo ◽

Jianfei Liu ◽

Nannan Luan

Keyword(s):

Fiber Bragg Grating ◽

Humidity Sensor ◽

Field Tests ◽

Polyimide Film ◽

Bragg Grating ◽

Wavelength Shift ◽

Sensing Applications ◽

Fluorinated Polyimide ◽

Temperature And Humidity ◽

Fluoride Doping

We propose and demonstrate a temperature and humidity sensor based on a fluorinated polyimide film and fiber Bragg grating. Moisture-induced film expansion or contraction causes an extra strain, which is transferred to the fiber Bragg grating and leads to a humidity-dependent wavelength shift. The hydrophobic fluoride doping in the polyimide film helps to restrain its humidity hysteresis and provides a short moisture breathing time less than 2 min. Additionally, another cascaded fiber Bragg grating is used to exclude its thermal crosstalk, with a temperature accuracy of ±0.5 °C. Experimental monitoring over 9000 min revealed a considerable humidity accuracy better than ±3% relative humidity, due to the sensitized separate film-grating structure. The passive and electromagnetic immune sensor proved itself in field tests and could have sensing applications in the electro-sensitive storage of fuel, explosives, and chemicals.

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Highly Sensitive Temperature and Humidity Sensor Based on Carbon Nanotube-Assisted Mismatched Single-Mode Fiber Structure

Micromachines ◽

10.3390/mi10080521 ◽

2019 ◽

Vol 10 (8) ◽

pp. 521 ◽

Cited By ~ 3

Author(s):

Yuan ◽

Qian ◽

Liu ◽

Wang ◽

Yu

Keyword(s):

Carbon Nanotube ◽

Humidity Sensor ◽

Single Mode ◽

Small Region ◽

Single Mode Fiber ◽

Fiber Structure ◽

Humidity Sensing ◽

Highly Sensitive ◽

Temperature And Humidity ◽

Stable Performance

Here we report on a miniaturized optical interferometer in one fiber based on two mismatched nodes. The all-fiber structure shows stable performance of temperature and humidity sensing. For temperature sensing in large ranges, from 40 to 100 °C, the sensor has a sensitivity of 0.24 dB/°C, and the adjusted R-squared value of fitting result reaches 0.99461 which shows a reliable sensing result. With carbon nanotubes coating the surface of the fiber, the temperature sensitivity is enhanced from 0.24561 to 1.65282 dB/°C in a small region, and the performance of humidity sensing becomes more linear and applicable. The adjusted R-squared value of the linear fitting line for humidity sensing shows a dramatic increase from 0.71731 to 0.92278 after carbon nanotube coating, and the humidity sensitivity presents 0.02571 nm/%RH.

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