Development of a new optical acceleration sensor

2007 ◽  
Author(s):  
Shuhai Jia ◽  
Jia Yang ◽  
Weijun Kong ◽  
Yanfen Du
Keyword(s):  
Acceleration Sensor ◽  
Optical Acceleration

Design and Simulation of Novel MEMS Optical Acceleration Sensor

2007 ◽  
Author(s):  
Shuhai Jia ◽  
Weijun Kong ◽  
Jia Yang ◽  
Yigui Li
Keyword(s):  
Mass Production ◽  
Signal To Noise Ratio ◽  
Low Cost ◽  
Dynamic Performance ◽  
Fresnel Diffraction ◽  
Acceleration Sensor ◽  
Signal To Noise ◽  
Numerical Simulator ◽  
Micro Lens ◽  
Optical Acceleration

A novel MEMS optical acceleration sensor based on a Fresnel diffraction micro-lens is designed in this paper, which is suitable to be used in the fly-by-light system of aviation. The principle of sensor is described. The dynamic performance design of sensor is presented. The constant of silicon micro spring and natural frequency is calculated by using the numerical simulator (ANSYS 8.0) of finite element method. Because the design of the sensor integrates a Fresnel diffraction lens, the optical throughput is high, which brings the advantage of higher signal-to-noise ratio with respect to photon noise. The design of the sensor is well suitable for mass production with normal process of MEMS a low cost. The proof-of-Principle fabrication and experiments show that the principle of this new MEMS optical acceleration sensor is correct.

A Fiber Bragg Grating acceleration sensor with temperature compensation

Optik ◽  
2021 ◽  
pp. 166993
Author(s):  
Xianfeng Zhao ◽  
Zhen’an Jia ◽  
Wei Fan ◽  
Wangfei Liu ◽  
Hong Gao ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Temperature Compensation ◽  
Bragg Grating ◽  
Acceleration Sensor

scholarly journals A Preliminary Study on the IoT-Based Pavement Monitoring Platform Based on the Piezoelectric-Cantilever-Beam Powered Sensor

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Yue Hou ◽  
Linbing Wang ◽  
Dawei Wang ◽  
Hailu Yang ◽  
Meng Guo ◽  
...  
Keyword(s):  
Cantilever Beam ◽  
Vibrational Energy ◽  
Acceleration Sensor ◽  
Piezoelectric Energy ◽  
Piezoelectric Cantilever ◽  
Pavement Monitoring ◽  
Preliminary Study ◽  
Operation Cycle ◽  
Infrastructure Health ◽  
Monitoring Platform

Green and sustainable power supply for sensors in pavement monitoring system has attracted attentions of civil engineers recently. In this paper, the piezoelectric energy harvesting technology is used to provide the power for the acceleration sensor and Radio Frequency (RF) communication. The developed piezoelectric bimorph cantilever beam is used for collecting the vibrational energy. The energy collection circuit is used to charge the battery, where the power can achieve 1.68 mW and can meet the power need of acceleration sensor for data collection and transmission in one operation cycle, that is, 32.8 seconds. Based on the piezoelectric-cantilever-beam powered sensor, the preliminary study on the IoT-based pavement monitoring platform is suggested, which provides a new applicable approach for civil infrastructure health monitoring.

Application of Practical Observer to Semi-Active Suspensions

1998 ◽  
Vol 122 (2) ◽  
pp. 284-289 ◽  
Author(s):  
H. Nakai ◽  
S. Oosaku ◽  
Y. Motozono
Keyword(s):  
Ride Comfort ◽  
Difficult Problem ◽  
Nonlinear Observer ◽  
Vertical Acceleration ◽  
Acceleration Sensor ◽  
Active Suspensions ◽  
Linear Observer ◽  
Gain Scheduled

This paper presents the development of gain-scheduled observers for semi-active suspensions. The states of the semi-active suspensions must be accurately obtained because the accuracy directly affects system performances such as ride comfort. Nonlinearity in the absorber of the semi-active suspensions is a difficult problem for estimating the accurate states using conventional linear observer theories. To solve this problem, we have designed a new gain-scheduled observer by introducing two improvements. The validity of this nonlinear observer was confirmed by simulations and experiments. The results indicate that the present observer can accurately estimate the suspension stroke velocity using the vertical acceleration sensor on the sprung mass. [S0022-0434(00)02302-9]

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