scholarly journals Rancang Bangun Alat Ukur PH, Suhu dan Kelembaban Pada Media Tanam Jamur Tiram

2018 ◽  
Vol 4 (3) ◽  
pp. 105
Author(s):  
Habibah Nurul Hidayah ◽  
Anwar Mujadin
Keyword(s):  
Humidity Sensor ◽  
Electronic Device ◽  
Ph Sensor ◽  
Ph Measurement ◽  
Growing Media ◽  
Measurement Temperature ◽  
Technical Measurement ◽  
Temperature And Humidity

<p><em>Abstrak – </em><strong>Pada tulisan ini akan dibahas mengenai</strong> t<strong>eknis pengukuran akurasi pH, suhu dan kelembaban yang menjadi bagian terpenting dalam menentukan kelayakan media jamur terutama pada tumbuh kembang jamur. Dalam penelitian ini telah dikembangkan sebuah divais elektronika untuk pengukuran media jamur terutama pH, suhu dan kelembaban yang dirancang secara terintegrasi menggunakan mikrokontroler ATmega8. Prototipe dilengkapi dengan sensor pH TD60805 dan sensor suhu -kelembaban DHT22.</strong></p><p><strong><em>Kata Kunci </em></strong><em>- Prototipe Pengukur pH, Suhu dan Kelembaban Media Tanam Jamur. ATMega8, DHT22, dan Probe TD60805.</em></p><p><em>Abstract - </em><strong>This paper will discuss about the technical measurement of pH accuracy, temperature and inertia which become the most important part in determining the feasibility of mushroom media, especially on mushroom growth. This research has developed an electronic device for measurement of mushroom media especially pH, temperature and humidity which is designed integrated using ATmega8 microcontroller. The prototype is equipped with a TD60805 pH sensor and a DHT22 temperature-humidity sensor.</strong></p><p><strong><em>Keywords -</em></strong><strong> </strong><em>Prototype pH Measurement, Temperature and Humidity or Mushroom Growing Media, ATMega8, DHT22 and Probe TD60805</em></p>

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.

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.

All-Solid-State pH Sensor Based on Conducting Polymer

2010 ◽  
Vol 93-94 ◽  
pp. 591-594 ◽  
Author(s):  
W. Natedungta ◽  
W. Prissanaroon-Ouajai
Keyword(s):  
Solid State ◽  
Conducting Polymer ◽  
Electrolyte Solution ◽  
Ph Sensor ◽  
Reference Electrode ◽  
Ph Measurement ◽  
Metallic Silver ◽  
Internal Solution ◽  
State Reference ◽  
Ph Electrode

A solid-state (free of internal electrolyte solution) reference electrode based on metallic silver is simply fabricated via a simple electrodeposition from AgNO3. Potentiometry is carried out to study the performance of the solid-state reference electrode in comparison with the commercial Ag/AgCl reference electrode. In addition, the proposed solid-state reference electrode has been integrated with the PPy-modified pH electrode to form an all-solid-state pH sensor, showing the capability of pH measurement. Absence of the internal solution leads to the pH sensor that is convenient to use and maintenance. In addition, the proposed pH sensor is possibly applied to biochemical and medical processes as well as flow infection analysis.

Research on Control System of Energy-Saving Greenhouse

2013 ◽  
Vol 448-453 ◽  
pp. 1312-1315
Author(s):  
Qun Li
Keyword(s):  
Control System ◽  
Energy Saving ◽  
Humidity Sensor ◽  
Environmental Parameters ◽  
Single Chip ◽  
Greenhouse Production ◽  
Temperature And Humidity ◽  
Digital Temperature Sensor ◽  
The Cost ◽  
Energy Intensive Industries

Energy-saving and environmental protection has become the theme of the 21st century. Greenhouse is an energy-intensive industries. Every year, 35% of energy consumption on agricultural production is used for greenhouse heating in the world, which accounts for 15-40% of the cost of greenhouse production. For improving energy efficiency and protecting the environment, the reasonable control of greenhouse environmental parameters is significant. The design of solar greenhouse real-time environment monitoring and automatic control system is based on 8051 single-chip in the thesis. The temperature and humidity signal are obtained from DS18B20 digital temperature sensor and IH3605 humidity sensor. When the greenhouse temperature exceeds the set temperature, the device can be started by perform timely processing, then the user can read LED digital display temperature and humidity values.

Surface pH Measurement during CO2 Corrosion by an IrOx pH Probe

2016 ◽  
Vol 1133 ◽  
pp. 381-385
Author(s):  
Saeid Kakooei ◽  
Mokhtar Che Ismail ◽  
Bambang Ari-Wahjoedi
Keyword(s):  
Real Time ◽  
Metal Surface ◽  
Ph Sensor ◽  
Temperature Monitoring ◽  
Ph Measurement ◽  
Financial Resources ◽  
Corrosion Monitoring ◽  
Material Damage ◽  
Sensor Design ◽  
Surface Ph

CO2 corrosion comprises the majority of material damage, which leads to shutdown in petroleum industries. This phenomenon depends on parameters such as pH and temperature. Monitoring and recording these parameters help industries minimize waste in terms of time and financial resources. The insufficiency of tools for this purpose is noticeable. This study proposed an potentiometric IrO2–pH microelectrode design in conjuction with a Ag/AgCl refrence electrode for real-time corrosion monitoring that can be used in various industries. Electrodeposition approach was used in the fabrication of a pH sensor. Electrochemical experiments were conducted to characterize the IrO2–pH sensor as well as monitor the pH on a metal surface in conjunction with the fabrication of a pH microelectrode-designed system. Results show that the proposed pH sensor design can be used for real-time corrosion monitoring by surface pH measurement.

Performance Evaluation of a Smart Mobile Air Temperature and Humidity Sensor for Characterizing Intracity Thermal Environment

2020 ◽  
Vol 37 (10) ◽  
pp. 1891-1905
Author(s):  
Chang Cao ◽  
Yichen Yang ◽  
Yang Lu ◽  
Natalie Schultze ◽  
Pingyue Gu ◽  
...  
Keyword(s):  
Air Temperature ◽  
Humidity Sensor ◽  
Thermal Environment ◽  
Spatial Scales ◽  
Low Cost ◽  
Thermal Conditions ◽  
Absolute Humidity ◽  
Health Concern ◽  
Vegetation Fraction ◽  
Temperature And Humidity

AbstractHeat stress caused by high air temperature and high humidity is a serious health concern for urban residents. Mobile measurement of these two parameters can complement weather station observations because of its ability to capture data at fine spatial scales and in places where people live and work. In this paper, we describe a smart temperature and humidity sensor (Smart-T) for use on bicycles to characterize intracity variations in human thermal conditions. The sensor has several key characteristics of internet of things (IoT) technology, including lightweight, low cost, low power consumption, ability to communicate and geolocate the data (via the cyclist’s smartphone), and the potential to be deployed in large quantities. The sensor has a reproducibility of 0.03°–0.05°C for temperature and of 0.18%–0.33% for relative humidity (one standard deviation of variation among multiple units). The time constant with a complete radiation shelter and moving at a normal cycling speed is 9.7 and 18.5 s for temperature and humidity, respectively, corresponding to a spatial resolution of 40 and 70 m. Measurements were made with the sensor on street transects in Nanjing, China. Results show that increasing vegetation fraction causes reduction in both air temperature and absolute humidity and that increasing impervious surface fraction has the opposite effect.

Design and Implementation of Automated Warehouse Monitoring System Based on the Internet of Things

2014 ◽  
Vol 543-547 ◽  
pp. 1099-1102 ◽  
Author(s):  
Zhi Qiang Yao ◽  
Heng Jun Zhu ◽  
Wen He Du
Keyword(s):  
Internet Of Things ◽  
Monitoring System ◽  
Humidity Sensor ◽  
The Internet ◽  
Design And Implementation ◽  
Zigbee Technology ◽  
Temperature And Humidity ◽  
The Internet Of Things

Aiming at the lagging for the monitoring of warehouse and lacking the intelligence, an automated warehouse monitoring system is designed using the internet of things, which may be used to monitor the temperature, humidity, and case of fire in the warehouse simultaneously. The temperature and humidity sensor SHT10 is implemented as the detector of the temperature and humidity, the flame sensor R2868 and the ionic smoke transducer HIS-07 are implemented as the detector of smoke and flame to find the fire. These data are sent to the computer in the manager center through Zigbee technology and the computer will process and analyze them. When the fire occurs, this system can extinguish the fire and call the manager or 119 automatically. The experiments have been performed, and it is shown that the performance of system is reliable, which has the practical value.

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.

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