scholarly journals Selection of MEMS Accelerometers for Tilt Measurements

2017 ◽  
Vol 2017 ◽  
pp. 1-13 ◽  
Author(s):  
Sergiusz Łuczak ◽  
Robert Grepl ◽  
Maciej Bodnicki
Keyword(s):  
Measurement Range ◽  
Initial Position ◽  
Measuring Range ◽  
Mems Accelerometers ◽  
Mathematical Formulas ◽  
Practical Guidelines ◽  
Tilt Sensor ◽  
Gravity Acceleration ◽  
Selection Of ◽  
Axial Tilt

In order to build a tilt sensor having a desired sensitivity and measuring range, one should select an appropriate type, orientation, and initial position of an accelerometer. Various cases of tilt measurements are considered: determining exclusively pitch, axial tilt, or both pitch and roll, where Cartesian components of the gravity acceleration are measured by means of low-g uni-, bi-, tri-, or multiaxial micromachined accelerometers. 15 different orientations of such accelerometers are distinguished (each illustrated with respective graphics) and related to the relevant mathematical formulas. Results of the performed experimental study revealed inherent misalignments of the sensitive axes of micromachined accelerometers as large as 1°. Some of the proposed orientations make it possible to avoid a necessity of using the most misaligned pairs of the sensitive axes; some increase the accuracy of tilt measurements by activating all the sensitive axes or reducing the effects of anisotropic properties of micromachined triaxial accelerometers; other orientations make it possible to reduce a necessary number of the sensitive axes at full measurement range. An increase of accuracy while using multiaxial accelerometers is discussed. Practical guidelines for an optimal selection of a particular micromachined accelerometer for a specific case of tilt measurement are provided.

scholarly journals Calibration and measurement capability (CMC) and customer technical qualification

2019 ◽  
Author(s):  
Suelí Fischer Beckert ◽  
Renan Ednan Flôres
Keyword(s):  
Measuring Range ◽  
Measurement Capability ◽  
Normative Documents ◽  
Calibration Methods ◽  
Accredited Laboratories ◽  
Accredited Laboratory ◽  
Effective Use ◽  
Formal Recognition ◽  
Selection Of ◽  
Calibration And Measurement Capability

In the context of metrological confirmation, calibration is an essential process in all quality assurance efforts. Several organizations choose to outsource this activity to accredited laboratories in accordance with the requirements set forth in ISO/IEC 17025: 2017. Companies understand that accredited laboratory has formal recognition of its technical competence to perform the services within its scope of accreditation. The document ILAC P14: 2013 sets out guidelines for the presentation of Calibration and Measurement Capability (CMC). However, when analysing the scope of accredited laboratories in some national calibration bodies, it is possible to observe that, for the same instrument and the same measuring range, different values are attributed to CMC. If the CMC should result from normal calibration operations on the best existing device, what causes this dispersion? How can the customer make effective use of the information contained in accreditation scopes? In order to further standardize the presentation of CMC in accreditation scopes, calibration methods adopted by laboratories should be required to meet the maximum permissible errors established by manufacturers or normative documents. Companies can outsource calibration activities. But the selection of service provider and the interpretation of the results remains a customer assignment. The paper presents an analysis of accreditation scopes of different national calibration bodies and discusses the qualification of those in charge of metrology management, regarding the knowledge and skills required for activity.

Room-Temperature Wide Measurement-Range Optical Fiber Fabry–Perot Tilt Sensor With Liquid Marble

2018 ◽  
Vol 18 (1) ◽  
pp. 170-177 ◽  
Author(s):  
Cheng Li ◽  
Xue Li ◽  
Xiyu Yu ◽  
Xiaobin Peng ◽  
Tian Lan ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Room Temperature ◽  
Measurement Range ◽  
Liquid Marble ◽  
Fabry Perot ◽  
Tilt Sensor

Distance Measurement System of High Precision Ultrasonic Based on Data Fusion

2014 ◽  
Vol 608-609 ◽  
pp. 880-884
Author(s):  
Ling Wang
Keyword(s):  
Data Fusion ◽  
Embedded System ◽  
Traditional Method ◽  
Measurement Range ◽  
High Accuracy ◽  
Sensor Data ◽  
Measuring Range ◽  
Multi Sensor Data Fusion ◽  
Ultrasonic Ranging ◽  
Accuracy Of Measurement

This paper presents a high accuracy ultrasonic ranging scheme based on MCU and puts forward a new method of multi sensor data fusion based on close degree and weight, finally get the expression of data fusion, so as to realize the multi sensors data fusion. The measuring range of this system is 3cm, range is 500cm, and the accuracy of measurement can reach 1mm. The work is stable in the measurement range 3cm-500cm that can meet the general requirements for measurement. The example analysis shows that the proposed method is more accurate than the traditional method, more suitable for the application and embedded system.

THE IMPLEMENTATION OF MULTI CRITERIA DECISION MAKING IN HANDLING CRIMINAL ACTIONS OF MARINE VIOLATION IN ALKI II AREA

JOURNAL ASRO ◽  
2021 ◽  
Vol 12 (01) ◽  
pp. 160
Author(s):  
Petrus Indra Cahyadi ◽  
Budisantoso Wirjodirdjo ◽  
Okol Sri Suharyo ◽  
Avando Bastari
Keyword(s):  
Initial Position ◽  
Indonesian Archipelago ◽  
Criminal Offenses ◽  
Work Area ◽  
Weight Value ◽  
The Hierarchical Structure ◽  
National Jurisdiction ◽  
Security Operations ◽  
Base Selection ◽  
Selection Of

One of the Main Duties of the Indonesian Navy (TNI AL) is to enforce the law and maintain security in the marine area of ​​national jurisdiction in accordance with the provisions of national law and international law which are then manifested in Marine Security Operations (Opskamla) The Indonesian Navy Base is one of the Opskamla components. which functions to project the strength of the Indonesian Navy to the area of ​​operation and provide ongoing administrative and logistical support to ensure the operational continuity of the elements of the Navy, carry out capacity building and conduct limited maritime security operations in the context of enforcing sovereignty and law at sea and carrying out coordination, regulation base defense. In the alternative selection of the Indonesian Navy Base in the Koarmada II work area, this study uses a combination of AHP and Topsis methods, the hierarchical structure modeling in the AHP method is influenced by the criteria and sub criteria, while for Topsis it is used as a ranking of the best alternative TNI AL bases as the initial position for Operation activities Marine Security The results obtained from the alternative weighting of the Indonesian Navy bases in sequence are the Banjarmasin Navy Base with a weight value of 0.959 more priority to be selected as a base for handling criminal offenses at sea, then the Nunukan Navy Base weight value 0.643 Palu weight value 0.589, Kendari weight value 0.333 Sangata has a weight value of 0.301, Kota Baru has a weight value of 0.265 and finally Toli-Toli has a weight value of 0.237.   Keywords : Opskamla, Naval Base, Selection of bases, Indonesian Archipelago Sea Lanes (ALKI II), Analytical Hierarchy Process (AHP), Topsis.

A MEMS resonant tilt sensor with high sensitivity maintained in the whole 360° measurement range

2016 ◽  
Author(s):  
Shudong Wang ◽  
Juan Ren ◽  
Tianyi Zhang ◽  
Yinsheng Weng ◽  
Zhuangde Jiang ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Measurement Range ◽  
Tilt Sensor

Temperature-insensitive FBG tilt sensor with a large measurement range

2009 ◽  
Author(s):  
Hualong Bao ◽  
Xinyong Dong ◽  
Huaping Gong ◽  
Chi Chiu Chan ◽  
P. Shum
Keyword(s):  
Measurement Range ◽  
Large Measurement ◽  
Tilt Sensor

Translational dependence of the geometry of metallic mono- and bilayers optimized at semi-ionic supports. The cases of Pd at γ-Al2O3(110), monoclinic ZrO2(001), and rutile TiO2(001).

CrystEngComm ◽  
2021 ◽  
Author(s):  
Andrey A. Rybakov ◽  
Vladimir Alexandrovich Larin ◽  
Dmitrii N Trubnikov ◽  
Silviya Todorova ◽  
Alexander Vladimirovich Larin
Keyword(s):  
Initial Position ◽  
Computational Scheme ◽  
Monoclinic Zro2 ◽  
Rutile Tio2 ◽  
Arbitrary Selection ◽  
Selection Of

A simplified computational scheme for “deposition” of metallic (Pd) monolayer at semi-ionic supports is considered. An arbitrary selection of the initial position of the deposited layer relative to the surface...

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