Research on Monitoring Instrument of Environmental Condition

2012 ◽  
Vol 424-425 ◽  
pp. 1309-1312
Author(s):  
Jun Hao Niu ◽  
Zhi Jin Qiu ◽  
Cong Hu
Keyword(s):  
Humidity Sensor ◽  
Small Error ◽  
Environmental Condition ◽  
Monitoring Instrument ◽  
Wide Range ◽  
Environment Temperature ◽  
Temperature And Humidity ◽  
Reliable Performance ◽  
Alarm Message ◽  
Reference Clock

A monitoring instrument of environment condition is described in this paper, which uses the LPC2368 as the controller. The acquisition of environmental condition is realized by using SHT11, which is a digital temperature and humidity sensor. A DS1302 is used as the real time reference clock device, and the time message is displayed on the LCD together with the environment temperature and humidity. As if the temperature or humidity is beyond the setting range, the alarm light and sound will be switched on to inform the manager. At the same time, the alarm message could be sent out to other monitor center by RS485 interface. Experimental results show that the temperature and humidity monitor features small, reliable performance, small error, and be suitable to a wide range.

scholarly journals Wide range and highly linear signal processed systematic humidity sensor array using Methylene Blue and Graphene composite

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Muhammad Umair Khan ◽  
Gul Hassan ◽  
Rayyan Ali Shaukat ◽  
Qazi Muhammad Saqib ◽  
Mahesh Y. Chougale ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Linear Combination ◽  
Linear Function ◽  
Humidity Sensor ◽  
Sensor Array ◽  
Combination Method ◽  
Humidity Sensing ◽  
Sensing Applications ◽  
Wide Range ◽  
Graphene Flakes

AbstractThis paper proposes a signal processed systematic 3 × 3 humidity sensor array with all range and highly linear humidity response based on different particles size composite inks and different interspaces of interdigital electrodes (IDEs). The fabricated sensors are patterned through a commercial inkjet printer and the composite of Methylene Blue and Graphene with three different particle sizes of bulk Graphene Flakes (BGF), Graphene Flakes (GF), and Graphene Quantum Dots (GQD), which are employed as an active layer using spin coating technique on three types of IDEs with different interspaces of 300, 200, and 100 µm. All range linear function (0–100% RH) is achieved by applying the linear combination method of nine sensors in the signal processing field, where weights for linear combination are required, which are estimated by the least square solution. The humidity sensing array shows a fast response time (Tres) of 0.2 s and recovery time (Trec) of 0.4 s. From the results, the proposed humidity sensor array opens a new gateway for a wide range of humidity sensing applications with a linear function.

scholarly journals Bulk soybean grain mass temperature in warehouses with isolated vents and vent-exhaust combined systems

2017 ◽  
Vol 47 (1) ◽  
Author(s):  
Eliza Rigoni de Pontes ◽  
Pedro Henrique Weirich Neto ◽  
Altair Justino ◽  
Carlos Hugo Rocha ◽  
Luiz Cláudio Garcia
Keyword(s):  
Glycine Max ◽  
Environmental Temperature ◽  
Mass Temperature ◽  
Environmental Humidity ◽  
Randomized Design ◽  
Environment Temperature ◽  
Temperature And Humidity ◽  
Completely Randomized Design

ABSTRACT: This study aimed to compare the temperatures in the mass of bulk soybeans ( Glycine max ) in warehouses with isolated vents and vent-combined exhaustion. A completely randomized design was used, with two treatments and ten repetitions. Treatments consisted of warehouse with curved vents and warehouse with curved + static exhaust vents. Each repetition contained the average of all readings in three days in all cables of the warehouse part under study, totaling 10 repetitions per month. The variable analyzed was the temperature in the grain mass in the lower, middle and upper parts of the warehouse from January to May 2012. The environment temperature and humidity were also registered. Static hoods, along with curved vents on the roof of the warehouse showed a tendency to reduce the temperature of the soybean mass with decrease in environmental temperature and increase in relative environmental humidity.

HIRFL Environment Temperature and Humidity Monitoring System Research and Design

2014 ◽  
Vol 651-653 ◽  
pp. 436-439
Author(s):  
Yun Jie Li ◽  
Yan Yu Wang ◽  
Jia Yin ◽  
Cheng Quan Pei ◽  
Xiao Li Ma
Keyword(s):  
Monitoring System ◽  
Basic Structure ◽  
Heavy Ion ◽  
Safe Operation ◽  
Ion Accelerator ◽  
Environment Temperature ◽  
Temperature And Humidity ◽  
Control And Monitoring System ◽  
Research And Design ◽  
Humidity Monitoring

HIRFL is an all-powerful heavy ion accelerator which is built by IMP of Chinese Academy of Science. It bears a lot of research tasks for china. Its control and monitoring system is very complex and very important, directly determines whether HIRFL safe operation. This paper is to study its much control and monitoring system of temperature and humidity monitoring system. Began to study the basic structure of the hardware, a specific architecture and specific HMI is designed, as well as the situation in the field installation deployment.

Thickness of the Still Air Layer Adhering to Perforated Plastic Plates and Fabric

1988 ◽  
Vol 58 (2) ◽  
pp. 86-90 ◽  
Author(s):  
Kozo Tsubouchi
Keyword(s):  
Water Vapor ◽  
Humidity Sensor ◽  
Unit Area ◽  
Water Vapor Pressure ◽  
Sample Surface ◽  
Hole Diameter ◽  
Vapor Pressures ◽  
Wide Range ◽  
Vapor Pressure Gradient ◽  
Surface Construction

The thickness of the still air layer adhering to perforated plastic plates and a fabric was investigated in terms of the water vapor pressure gradient in the zone of diffusion above the samples. The water vapor pressures above the samples were determined from measurements using a temperature and relative humidity sensor. To analyze the thickness of the still air layer for a wide range of evaporation rates, the hole diameter and the number of holes per unit area were changed and the measurements were under different temperature and humidity/gradient conditions. The thickness of the still air layer corresponded to a distance of 10 mm from the sample surface and was not related to the surface construction and materials.

INFLUENCE OF THE TEMPERATURE AND HUMIDITY REGIME OF BURIED VOLUMES ON THE PRESERVATION OF ARCHITECTURAL MONUMENTS WITH MONUMENTAL PAINTINGS ON THE EXAMPLE OF THE TRANSFIGURATION CHURCH IN POLOTSK

2021 ◽  
Vol 98 (6) ◽  
pp. 43-49
Author(s):  
V.B. DOROKHOV ◽  
◽  
N.YU. PINTELIN ◽  
D.YU. ZHELDAKOV ◽  
◽  
...  
Keyword(s):  
Wide Range ◽  
Temperature And Humidity ◽  
The Impact

The heat and humidity regime of the buried parts can be essential, and sometimes crucial, for the normalization of the microclimate of the entire monument. The experience of thermophysical studies in church architectural monuments shows a wide range of factors that determine the impact of the temperature and humidity regime of the buried volumes on the formation of conditions for the preservation of the monument as a whole. Currently, the Climate Laboratory of Museums and Architectural Monuments of GOSNIIR conducts research on this problem in order to create a methodology for studying and normalizing the heat and humidity regime of the aboveground and underground parts of the building as a whole to develop design and technological approaches to optimizing the conditions for the preservation of the monument. The article considers a practical example of providing heat and humidity conditions for the preservation of a monument with monumental painting.

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

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.

Development of liquidus thermobarometer for the simulation of equilibrium olivine-melt

2019 ◽  
pp. 62-74
Author(s):  
E. V. Koptev-Dvornikov ◽  
D. A. Bychkov
Keyword(s):  
Experimental Data ◽  
Liquidus Temperature ◽  
Small Error ◽  
Silicate Melt ◽  
System Of Equations ◽  
Temperature Range ◽  
Calculated Liquidus ◽  
Wide Range ◽  
Multidimensional Statistics

A system of equations of the liquidus thermobarometer of olivine — silicate melt was obtained by processing the sample of 772 experimental equilibria of olivines with basic melts using methods of multidimensional statistics. Equations reproduce with small error experimental data in a wide range of basite compositions (from komatiites to dacites), temperatures from 1040 to 1500 ᵒС, pressures from 1 bar up to 30 kbar. Thermobarometer testing demonstrated that the deviations of the calculated liquidus temperature from the experimental one in most of the temperature range do not exceed ±3 ᵒC.

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

Sensors ◽  
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.

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

Micromachines ◽  
2019 ◽  
Vol 10 (8) ◽  
pp. 521 ◽  
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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