Toxic gas sensor using resonant frequency variation in micro-cantilever

2012 ◽  
Author(s):  
S. Subhashini ◽  
A. Vimala Juliet
Keyword(s):  
Resonant Frequency ◽  
Gas Sensor ◽  
Frequency Variation ◽  
Toxic Gas ◽  
Micro Cantilever

Investigating a Fluorobenzene Based Single Electron Transistor As a Toxic Gas Sensor

2021 ◽  
Author(s):  
Kumar Gaurav ◽  
Boddepalli SanthiBhushan ◽  
Ravi Mehla ◽  
Anurag Srivastava
Keyword(s):  
Gas Sensor ◽  
Single Electron ◽  
Single Electron Transistor ◽  
Toxic Gas

High sensitive and selective toxic gas sensor based on monolayer Tetra-MoN2 for sensing NO: A first-principles study

2021 ◽  
Vol 769 ◽  
pp. 138359
Author(s):  
Ziwei Chen ◽  
Fusheng Zhang ◽  
Hui Li ◽  
Peixuan Jiang ◽  
Xianping Chen ◽  
...  
Keyword(s):  
Gas Sensor ◽  
First Principles ◽  
First Principles Study ◽  
Toxic Gas

Energy Resource for a RFID System Based on Dynamic Features of Reddy-Levinson Beam

2020 ◽  
Author(s):  
Alireza Babaei ◽  
Johné Parker ◽  
Paria Moshaver
Keyword(s):  
Resonant Frequency ◽  
Shear Deformation ◽  
Displacement Field ◽  
Energy Harvester ◽  
Frequency Variation ◽  
Low Input ◽  
Piezoelectric Energy ◽  
Rfid System ◽  
Proposed Model ◽  
Thick Beam

Abstract Understanding the effect of design parameters on resonant frequency variation is a critically important aspect of piezoelectric energy harvester device design. As a first step in more accurately investigating the performance of a fixture designed for targeted RFID tag communication that also utilizes an energy harvesting application, this paper analyzes the variations in resonant frequency of a higher-order beam based on Reddy-Levinson theory (RLBT) under rotation effects. A long-term goal of this research is to implement an effective energy harvester on the RFID system. Part of the experimental RFID test fixture can be modeled as a beam (or beam element); thus, understanding the resonance frequency variations due to shear deformation and rotation effects is an important first step in obtaining information about the efficacy of the fixture in serving as an energy harvester. Investigating the performance of a beam also provides valuable information about the maximum power, frequency bandwidth, and tuning ability of the device that can be expected from an analogous energy harvester. For the first time, the resonant frequency variation of a rotating thick beam is investigated. Specifically, RLBT is used to verify the effects of shear deformation upon resonant frequency, and a coupled displacement field is utilized to enable tuning the potential piezoelectric energy harvester to low-input excitations by means of constraining translational and rotational movements of the system based on a linear constraint equation. Navier’s method as an analytical-numerical method is adopted to discretize the continuous system and to find resonant frequencies, respectively. Results reveal the significance of beam thickness and rotation effects of the proposed model for the purpose of minimizing energy usage. Current results are compared and verified numerically with available benchmarks to confirm a satisfactory level of accuracy. The proposed model, which is based on a coupled displacement field, can also be used to design other piezoelectric electro-mechanical-systems; e.g., vibration isolators, and vibration controllers. In other words, in an energy-scavenging system, a fundamental understanding of parameters affecting the resonant frequency can be accomplished through the presented analysis. The proposed model highlights the fact that, by adopting a proper speed factor, tuning the piezoelectric energy harvester to low-input excitations is possible. Additionally, it is observed that the rotation effect on the resonant frequency is more severe than effects of slenderness ratio. Finally, in this paper an improved model is proposed to capture the shear deformation effect, particularly for thick-beam energy harvesters, with the capability of tuning to low-input excitations.

scholarly journals A Major Challenges Advanced Underground Drainage Monitoring and Automatic Rescue System using Internet of Things

2021 ◽  
pp. 175-181
Author(s):  
Dr. R. Pushpavali ◽  
Prakadeeswaran S ◽  
Sivanesan S T ◽  
Aravind G
Keyword(s):  
Internet Of Things ◽  
Gas Sensor ◽  
Ultrasonic Sensor ◽  
Health Issues ◽  
Level Indicator ◽  
New Device ◽  
Methane Gas ◽  
Rescue System ◽  
Toxic Gas ◽  
Sanitation Workers

In this project, An Advanced Underground Drainage Monitoring And Automatic Rescue System using Internet of Things is proposed to protect the sanitation workers form health issues. In India sewage can be cleaned from manholes and drains are a difficult and risky task for anyone, but these people/workers are forced to do these jobs just to earn for their family economy. In order to overcome this issues, a new device is proposed to monitor the human health while entering into the sewage and provide the health parameters in the real time to the officials outside or the control room. Particularly, blood pressure of sanitation workers and toxic gas level of drainage is monitored using this new proposed rescue system. The main component of this system is Arduino controller. There are three types of sensors such as Toxic gas sensor, Methane gas sensor and Ultrasonic sensor used for the proposed system. Water level indicator is used when drainage is full to find from ultrasonic sensor, SMS will be send through GSM technology. Methane Gas and Toxic gas sensor level is high, Buzzer will be ON at the same time location will be share automatically with the help of GPS. The received sensor details display on LCD at receiver with help of GSM. The performance of proposed system is compared with other existing system and shown to be more effective in terms of protect the sanitation workers from health issues.

A Resonant Gas Sensor Based on Micro-Cantilever

2012 ◽  
Vol 450-451 ◽  
pp. 1532-1535
Author(s):  
Shuang Mei Li
Keyword(s):  
Gas Sensor ◽  
Dynamic Properties ◽  
Micro Cantilever

The static and dynamic properties of the mcrocantilever are presented in this paper, which provides theoretical ways to improve the sensitivity of mcrocantilever. Two methods of resonant excited and detecting mechanism are analyzed with examples. The probabilities of applying these mechanism in gas sensor are also discussed.

scholarly journals Study on the Morphology Stability of TiO2 Nanotube Arrays towards Temperature as a Potential Toxic Gas Sensor

2016 ◽  
Vol 20 ◽  
pp. 130-132
Author(s):  
Mohd Hasmizam Razali ◽  
Muhammad Hafiz Ashraf Mat Zaid ◽  
Mahani Yusoff
Keyword(s):  
Gas Sensor ◽  
Tio2 Nanotube Arrays ◽  
Tio2 Nanotube ◽  
Nanotube Arrays ◽  
Toxic Gas
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