An Absolute Linear Displacement Sensor Based on Orthogonal Dual Traveling Wave Magnetic Field

Wu, Liang; Tong, Peng; Wang, Xinda; Yanchen, A; Su, Rui

doi:10.1109/jsen.2022.3148283

Cited by 6 publications

(3 citation statements)

References 23 publications

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“…The sensor uses two MR sensors to measure the two rows of the magnetic arrays for absolute displacement measurements. Wu et al [ 20 ] presented a sensor based on an orthogonal dual-traveling wave magnetic field. The sensor uses two field coils to generate the magnetic field, and two inductive coils induce the magnetic field to generate the electrical signals.…”

Section: Introductionmentioning

confidence: 99%

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A Moving Magnetic Grid-Type Long-Range Linear Absolute Displacement Sensor

Zhang

Wang

Cao

et al. 2023

Sensors

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In order to overcome the shortcomings of the traditional magnetic absolute linear displacement sensors in which cables affect the flexibility and measurement range in linear motor transmission systems, this paper proposes a novel cable-free moving magnetic grid-type long-range absolute displacement sensor. The sensor consists of a magnetic grid and a signal acquisition board. The magnetic grid is a moving component that contains two rows of permanent magnet arrays, one for relative displacement measurement and the other for the displacement interval code. The signal acquisition board is a fixed component that uses n groups of two-row Hall sensor arrays for continuous absolute displacement measurement. The principle of the sensor using the 2D magnetic field signal for the relative displacement measurement is analyzed, and a measurement method based on Hall sensor arrays for coding and absolute displacement detection over n cycles is proposed. Finally, a sensor prototype is fabricated and the experiments are performed. The experimental results show that the measurement resolution of the sensor is 5 μm, and the measurement accuracy is ±14.8 μm within the measurement range of 0–98.3 mm. The proposed sensor can realize continuous absolute displacement measurement over multiple cycles without cable binding.

show abstract

Section: Introductionmentioning

confidence: 99%

“…From the studies above, the traditional magnetic absolute linear displacement sensor usually consists of a magnetic grid and an encoded sensor [ 20 , 21 ]. The magnetic grid is the fixed component that provides the magnetic field information for the sensor.…”

Section: Introductionmentioning

confidence: 99%

A Moving Magnetic Grid-Type Long-Range Linear Absolute Displacement Sensor

Zhang

Wang

Cao

et al. 2023

Sensors

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show abstract

“…This prediction system was used in a field test on the North Sea near the Dutch coast on a 42 m patrol vessel [24]. However, absolute measurement is mostly used in the production and manufacture of grating measurement, medical imaging, and small machinery industry, and not much research has been conducted in the field of ship measurement [25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

An Absolute Displacement Measurement Method and Its Application in Ship Motion Measurement

Han

2023

JMSE

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Due to the fact that there is no static reference point in ocean space, relative measurement sensors such as laser sensors cannot be applied to the measurement of ship motion. In order to collect the motion signal of a ship in the ocean more accurately, an absolute measurement method for the motion of a ship is proposed. Firstly, the acceleration signal in the heave direction of the ship is obtained by using an acceleration sensor; secondly, the time–frequency domain integration algorithm is used to avoid the problem of the quadratic trend item and the influence of the low-frequency signal, and the ship’s heave displacement value is obtained by integration; finally, the displacement signal measured by the laser sensor and the integrated displacement signal of the acceleration sensor are compared with each other to verify the effectiveness of the absolute measurement of the heave displacement of the ship based on the acceleration sensor. At the same time, an angle sensor is used to measure the roll angle and pitch angle in the motion of the ship, form an absolute measurement system for the motion of the ship, and verify that the measurement points are arranged on the ship, which proves that the system can collect data from the ship in sea areas far from the coast. Motion signals are more advantageous.

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Capacitive Linear Displacement Sensors With High Accuracy and Long Range Absolute Positioning Capability Based on a Splicing Technique

Peng

Wang

et al. 2023

IEEE Sensors J.

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An Absolute Linear Displacement Sensor Based on Orthogonal Dual Traveling Wave Magnetic Field

Cited by 6 publications

References 23 publications

A Moving Magnetic Grid-Type Long-Range Linear Absolute Displacement Sensor

A Moving Magnetic Grid-Type Long-Range Linear Absolute Displacement Sensor

An Absolute Displacement Measurement Method and Its Application in Ship Motion Measurement

Capacitive Linear Displacement Sensors With High Accuracy and Long Range Absolute Positioning Capability Based on a Splicing Technique

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