Study on Improvement of Gravity Acceleration Measurement Method and Instrument

2021 ◽  
Author(s):  
Tong Qiang ◽  
Li Fugang
Keyword(s):  
Measurement Method ◽  
Acceleration Measurement ◽  
Gravity Acceleration

scholarly journals Gravity acceleration measurement based on Atom interferometry

2018 ◽  
Vol 1149 ◽  
pp. 012021
Author(s):  
Dong Hu ◽  
Yu Wang ◽  
Huijuan Ma ◽  
Ning Ru ◽  
Li Zhang
Keyword(s):  
Atom Interferometry ◽  
Acceleration Measurement ◽  
Gravity Acceleration

Simulation and Analysis of Measurement Method for Projectile Axial Acceleration by MEMS Sensor

2011 ◽  
Vol 411 ◽  
pp. 461-465
Author(s):  
Peng Fei Huo ◽  
Chao Wang ◽  
Ke Yu Qi
Keyword(s):  
Standard Deviation ◽  
Measurement Error ◽  
Measurement Errors ◽  
Measurement Method ◽  
Measurement Methods ◽  
Acceleration Measurement ◽  
Mems Sensor ◽  
Axial Acceleration ◽  
Simulation Results ◽  
Ballistic Trajectory

Measurement of axial acceleration is necessary for projectile range prediction. Three measurement methods, dual-accelerometer configuration, dual-accelerometer filtering and direct filtering, are used to eliminate acceleration measurement errors caused by accelerometer configuration location, installation errors and space rotating of projectiles. Based on six-degree ballistic trajectory model, the three measurement methods of projectile axial acceleration are simulated, and the simulation results show that standard deviation of dual-accelerometer configuration measurement error is 35.7318, while standard deviation of dual-accelerometer filtering measurement error is 2.2958 and direct filtering measurement error is 0.3344.

scholarly journals Absolute gravity acceleration measurement in atomic sensor laboratories

2012 ◽  
Vol 127 (3) ◽  
Author(s):  
M. de Angelis ◽  
F. Greco ◽  
A. Pistorio ◽  
N. Poli ◽  
M. Prevedelli ◽  
...  
Keyword(s):  
Absolute Gravity ◽  
Acceleration Measurement ◽  
Gravity Acceleration

scholarly journals Optical Acceleration Measurement Method with Large Non-ambiguity Range and High Resolution via Synthetic Wavelength and Single Wavelength Superheterodyne Interferometry

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3417 ◽  
Author(s):  
Qianbo Lu ◽  
Dexin Pan ◽  
Jian Bai ◽  
Kaiwei Wang
Keyword(s):  
High Resolution ◽  
Measurement Method ◽  
Phase Measurement ◽  
Optical Modulators ◽  
Acceleration Measurement ◽  
Real Time Measurement ◽  
Narrow Bandwidth ◽  
Measurement Resolution ◽  
Good Agreement ◽  
Optical Acceleration

Interferometric optomechanical accelerometers provide superior resolution, but the application is limited due to the non-ambiguity range that is always less than half of the wavelength, which corresponds to the order of mg. This paper proposes a novel acceleration measurement method based on synthetic wavelength and single wavelength superheterodyne interferometry to address this issue. Two acousto-optical modulators and several polarizers are introduced to the two-wavelength interferometry to create four beams with different frequencies and polarization states, and two ultra-narrow bandwidth filters are used to realize the single wavelength measurement simultaneously. This technique offers the possibility to expand the non-ambiguity range without compromising the high resolution. Also, the superheterodyne phase measurement and the corresponding processing algorithm are given to enable real-time measurement. A prototype is built and the preliminary experimental results are compared with the simulation results, showing good agreement. The results prove an estimated acceleration measurement resolution of around 10 μg and a non-ambiguity range of larger than 200 mg, which is more than 100 times that of the single wavelength-based optical accelerometer.

scholarly journals PENENTUAN PERCEPATAN GRAVITASI PADA PERCOBAAN GERAK JATUH BEBAS DENGAN MEMANFAATKAN RANGKAIAN RELAI

2017 ◽  
Vol 2 (2) ◽  
pp. 107
Author(s):  
Haris Rosdianto
Keyword(s):  
Measurement Method ◽  
Free Fall ◽  
Experiment Design ◽  
Time Data ◽  
Fall Time ◽  
Average Acceleration ◽  
Fall Experiment ◽  
Gravity Acceleration

The determination of the gravity acceleration through free fall experiment using the relay circuit has been done. This study aims to make free-fall experiment design using relay circuit, and determine the value of gravity acceleration by using this experiment design. The measurement method used in this study is to measure the free fall time of the object using a stopwatch that can work automatically. The result of this research is this experiment design can be used to get the free fall time data automatically. The values of gravity acceleration to 10 cm, 20 cm, 30 cm, 40 cm and 50 cm respectively, are 9.80952381 m/s2, 9.814058957 m/s2, 9.845 m/s2, 9.858283385 m/s2, and 9.829645226 m/s2. So that the average acceleration value of the five variations of height is 9.831302275 m/s2. Keywords: Free fall motion, gravity acceleration, relay circuit.

scholarly journals Quantitative Comparison between the Smartphone Based Experiments for the Gravity Acceleration Measurement at Home

2021 ◽  
Vol 11 (9) ◽  
pp. 493
Author(s):  
Marco Anni
Keyword(s):  
Data Analysis ◽  
Quantitative Comparison ◽  
Suitable Method ◽  
Acceleration Measurement ◽  
Physical Experiments ◽  
Teaching Purpose ◽  
Gravity Acceleration ◽  
Effective Use ◽  
At Home

Smartphones are currently proposed as potential portable laboratories to perform a wide variety of physical experiments for teaching purpose. However, the frequent lack of clarity about the ease of replication of the experiments and on their accuracy often limits their effective use. In this work we deeply compare several smartphone-based experiments to determine the gravity acceleration g by only using cheap materials easily available at home. The experiment and the data analysis complexity are progressively increased, starting from fast and easy to replicate methods. The advantages and possible limits of all the methods are deeply discussed in order to allow an evaluation of the most suitable method for any particular teaching scenario.

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