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

Temperature-insensitive FBG tilt sensor with a large measurement range

2010 ◽  
Vol 283 (6) ◽  
pp. 968-970 ◽  
Author(s):  
Hualong Bao ◽  
Xinyong Dong ◽  
Chunliu Zhao ◽  
Li-Yang Shao ◽  
Chi Chiu Chan ◽  
...  
Keyword(s):  
Measurement Range ◽  
Large Measurement ◽  
Tilt Sensor

A bubble-level tilt sensor with a large measurement range

1989 ◽  
Vol 17 (3-4) ◽  
pp. 339-344 ◽  
Author(s):  
Y.Z. Xing ◽  
F. Schneider
Keyword(s):  
Measurement Range ◽  
Large Measurement ◽  
Tilt Sensor

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

scholarly journals Ultra-Sensitive Flexible Tactile Sensor Based on Graphene Film

Micromachines ◽  
2019 ◽  
Vol 10 (11) ◽  
pp. 730 ◽  
Author(s):  
Xiaozhou Lü ◽  
Liang Qi ◽  
Hanlun Hu ◽  
Xiaoping Li ◽  
Guanghui Bai ◽  
...  
Keyword(s):  
Industrial Robot ◽  
Graphene Film ◽  
High Sensitivity ◽  
Tactile Sensor ◽  
Measurement Range ◽  
Tactile Sensors ◽  
Piezoresistive Effect ◽  
Large Measurement ◽  
Pet Film ◽  
Maximum Measurement

Flexible tactile sensor can be integrated into artificial skin and applied in industrial robot and biomedical engineering. However, the presented tactile sensors still have challenge in increasing sensitivity to expand the sensor’s application. Aiming at this problem, this paper presents an ultra-sensitive flexible tactile sensor. The sensor is based on piezoresistive effect of graphene film and is composed of upper substrate (PDMS bump with a size of 5 mm × 7 mm and a thickness of 1 mm), medial Graphene/PET film (Graphene/PET film with a size of 5 mm × 7 mm, PET with a hardness of 2H) and lower substrate (PI with fabricated electrodes). We presented the structure and reduced the principle of the sensor. We also fabricated several sample devices of the sensor and carried out experiment to test the performance. The results show that the sensor performed an ultra high sensitivity of 10.80/kPa at the range of 0–4 kPa and have a large measurement range up to 600 kPa. The sensor has 4 orders of magnitude between minimum resolution and maximum measurement range which have great advantage compared with state of the art. The sensor is expected to have great application prospect in robot and biomedical.

Development of a Surface Roughness Measurement System in a Narrow Borehole

2016 ◽  
Vol 10 (5) ◽  
pp. 821-826
Author(s):  
Eiki Okuyama ◽  
◽  
Yuichi Suzuki ◽  
Masahiro Morikawa ◽  
Yuma Suzuki ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Conventional Method ◽  
Degrees Of Freedom ◽  
Optical Signal ◽  
Measurement Range ◽  
Standard Test ◽  
Roughness Measurement ◽  
Surface Roughness Measurement ◽  
Test Pieces ◽  
Large Measurement

In industrial fields, it is frequently necessary to measure surface roughness in confined spaces such as boreholes and grooves in workpieces. However, the surface roughness of a narrow borehole can be measured only up to a few millimeters from its end when using a small stylus. Alternatively, destructive measurements must be performed. We previously proposed a novel surface roughness measurement sensor. To make the sensor sufficiently small, we used a stylus with a cylindrical mirror and a lensed fiber instead of a conventional inductive pick-up. The proposed sensor converts the signal used for measuring the surface roughness of a borehole into an optical signal, which is transferred outside the borehole by an optical fiber. The experimental results demonstrate that this system has a measurement range of 8 μm and a sensitivity of 19 nm. In this paper, we propose a carriage that supports the stylus when measuring the surface roughness in a small borehole. The proposed carriage has two degrees of freedom: displacement along the borehole axis and rotation around the borehole axis. In experiments, the surface roughness of standard test pieces was measured using the proposed method and the conventional method. The measurement results obtained by these methods were found to be very similar. Furthermore, a borehole with 2.4 mm diameter was measured. The measurement result included the characteristic wave that was obtained by the conventional method in places. The experiments also revealed some problems of the proposed system. For example, the setting procedure of the measured surface in the 8 μm measurement range was difficult. Consequently, a large measurement range or a null method is required.

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