Inductive tilt sensor with magnets and magnetic fluid

Olaru, Radu; Dragoi, D.D.

doi:10.1016/j.sna.2005.01.015

Cited by 102 publications

(56 citation statements)

References 5 publications

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“…However, when the tilt angle varies from 9.64° to 37.05°, the trend changes rapidly. According to (5), the data's fitting curve is expressed as y=1517.75-2.05sinx/sin(48°-x) with the fitting degree R²=0.984. The results of the theory and experiment are consistent.…”

Section: Sensing Principlementioning

confidence: 99%

“…Most conventional tilt sensors are of an electronic type, transforming the inclination into electronic signals through a magnetic effect [1][2][3][4] or a capacitive effect [5]. Comparing with those tilt sensors above, optical fiber tilt sensors [6][7][8][9][10][11][12][13] have important advantages of electrically passive operation and immunity to electromagnetic interference, and most of the sensors are based on fiber Bragg gratings (FBGs).…”

Section: Introductionmentioning

confidence: 99%

“…The principle of these sensors is that the FBGs' reflective wavelength will shift with applied strains through transitive installations when working. In the great majority of the tilt sensors based on the FBGs, the top ends of the FBGs are fixed on a frame while the bottom ends need to be bonded with a heavy mass [5][6][7][8][9][10]. These require the configuration of FBG-based tilt sensors to be more complex and delicate.…”

Section: Introductionmentioning

confidence: 99%

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Tilt sensor based on intermodal photonic crystal fiber interferometer

Zhang

Chen

et al. 2014

Photonic Sens

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A tilt sensor based on an intermodal photonic crystal fiber (PCF) interferometer is demonstrated. The sensor consists of a tubular filled with NaCl aqueous solutions and an intermodal PCF interferometer, which is formed by using a short PCF with two single-mode fibers (SMFs) spliced at both ends, and the air-holes in the splice regions are fully collapsed. The intermodal PCF interferometer is fixed in a rigid glass tubular with a slant orientation, and a half of the PCF is immersed in the NaCl aqueous solutions, while the other half is exposed in air. When tilting the tubular, the length of the PCF immersed changes so that the transmission spectrum moves. Therefore, by monitoring the wavelength shift, the tilt angle can be achieved. In the experiment, a 0.8-cm-length intermodal PCF interferometer was adopted. The sensitivity of the proposed sensor was obtained from -1.5461 nm/° to -30.1244 nm/° when measuring from -35.1° to 37.05°.

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Section: Sensing Principlementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tilt sensor based on intermodal photonic crystal fiber interferometer

Zhang

Chen

et al. 2014

Photonic Sens

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“…Different approaches have been used to develop MEMS based tilt sensors like capacitive [9,12,13], electrolyte [21,14,15], resistive [10], thermal [11], optical [16,17] and inductive [18].…”

Section: Introductionmentioning

confidence: 99%

Triboelectric Nanogenerator Based Self-Powered Tilt Sensor

et al. 2018

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This work focuses on the fabrication and evaluation of triboelectric nanogenerator (TENG) based self-powered tilt sensor. The proposed fabricated structure is composed of polydimethylsiloxane (PDMS), steel ball, gold (Au) as electrode and circular ring housing. A specific configuration of electrodes was used to measure the tilt at different angles. FEM simulations were used to verify the electric potential at the electrodes at different angles. The outputs of the fabricated sensor were measured at different angles from 0 to 360°. A sensitivity of 254 mV/rad is obtained in single axis. The TENG based tilt sensor generates an open circuit voltage of 450 mV at 10 MΩ.

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“…O.Baltag (2) develops a tilt sensor based on magnetic fluid whose liquid property causes the fluid surface keep horizontal and correspond to a change of output. R.Olaru (3) presents a new type of tilt inductive sensor based on the potential magnetic energy function of the assembly constituted by two repulsion magnets. Besides of the continuous angle sensor, discrete angular position sensors have also been studied.…”

Section: Introductionmentioning

confidence: 99%

A Novel Multifunctional Angular Position Sensor with Magnetic Fluid

Quan

Shida

2007

IEEJ Trans. SM

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The achievement of inclination angle and inclined direction simultaneously is highly recommended in many application fields. But many researchers are concerning on measuring only one angular parameter which has a limited application. Based on the principle of inclinometer, the paper proposes a sphere-shape angular position sensor for testing two angular parameters based on multifunctional sensing technique. The proposed sensor is mainly characterized in the following respects. First, inclination angle and inclined direction are measured simultaneously with a single structure. Second, a full-range measurement is achieved, which indicates the inclination angle ranges from 0• to 180• and the inclined direction ranges from 0 • to 360• . Its compact and single structure permits widely applications on automobile, robotic system, health science and so on. We herein discuss the configuration of the sensor and its geometrical analysis. A prototype is built, the evaluated results of which examine the feasibility of the sensor. Two angular parameters are successfully evaluated by analyzing the sample points using 2-D cubic spline interpolation.Sphere-shape container is selected instead of utilizing the common cylinder shape because of its uniform to every direction. Magnetic fluid is selected as the inertial element of sensor attributable to its liquidity and electromagnetism character. The liquidity of magnetic fluid causes the flowing to the position with the lowest gravity center and its electromagnetism character permits it to be taken as the core of a coil for amplifying the self-inductance, whose value is only related to the nip angle of coil section and fluid surface.The configuration of the prototype is shown as Fig. 1 Analytic geometry is utilized for analyzing the relationship between three nip angles and angle parameters. Three inductances can be expressed by θ and φ as its variables.where α1, α2 and α3 are the nip angles of three coil sections and the horizontal.In order to prove the feasibility of the sensor and compose the database for data processing, three inductances are measured at some sample points. Fig. 2 shows the surface composed by points with L1, L2 and L3 as their coordinates. A block surface can be obtained, each point on which indicates a unique direction of the whole space. The two center points of the surface are the positions that θ = 0• and θ = 180• .Each contour line displayed represents the inclined direction and the radial distance from the center represents the inclination angle. 2-D cubic spline interpolation is chosen as data processing method due to its smooth peculiarity and high accuracy. The evaluated results prove the feasibility of the proposed sensor. MemberA sphere-shape angular position sensor for measurement inclination angle and inclined direction simultaneously based on multifunctional sensing approach is proposed, which is characterized in the following respects, such as the measurement of two angles, a full-range measurement, and has a compact and single structure. Three...

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Inductive tilt sensor with magnets and magnetic fluid

Cited by 102 publications

References 5 publications

Tilt sensor based on intermodal photonic crystal fiber interferometer

Tilt sensor based on intermodal photonic crystal fiber interferometer

Triboelectric Nanogenerator Based Self-Powered Tilt Sensor

A Novel Multifunctional Angular Position Sensor with Magnetic Fluid

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