Drift-Free Integration in Inductive Magnetic Field Measurements Achieved by Kalman Filtering

Arpaïa, Pasquale; Buzio, Marco; Capua, Vincenzo Di; Grassini, Sabrina; Parvis, Marco; Pentella, Mariano

doi:10.3390/s22010182

Cited by 3 publications

(2 citation statements)

References 28 publications

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“…To further increase the sensitivity (field harmonics scale with r n−1 where n is the multipole order and r the measurement radius), the cylindrical head has the largest possible diameter compatible with the cold bore tube dimensions, which has a diameter of 136.5 mm. Each coil is realized through Printed Circuit Board (PCB) technology and has a calibrated area of 0.0594 m 2 [14], and consists of 132 turns printed on a 16-layer board, having a size of 40 mm×20 mm. Finally, a Hall sensor is installed on one of the PCBs to pre-align the magnetometer to the maximum field.…”

Section: B Transducer Designmentioning

confidence: 99%

A Translating-Coil Magnetometer for the Magnetic Measurements of the HL-LHC High-Order Corrector Magnets at Room Temperature

Pentella,

Dalane,

De Matteis

et al. 2024

IEEE Trans. Appl. Supercond.

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This paper describes the design and development of a translating-coil magnetometer for the room-temperature magnetic measurements of the superferric, high-order corrector magnets for the high-luminosity upgrade of the Large Hadron Collider at CERN (HL-LHC). The measurement system consists of a set of induction coils, tangentially positioned on a measurement head. The translation of the measurement head yields an induced voltage proportional to the longitudinal field profiles of the magnets. In this way, it is possible to locate the longitudinal center and calculate the magnetic length. The measurements provide feedback to the assembly and fabrication processes. The metrological characterization of the induction-coil configurations is presented, and the measurement results are discussed in view of the target requirements of the HL-LHC project.

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Section: B Transducer Designmentioning

confidence: 99%

A Translating-Coil Magnetometer for the Magnetic Measurements of the HL-LHC High-Order Corrector Magnets at Room Temperature

Pentella,

Dalane,

De Matteis

et al. 2024

IEEE Trans. Appl. Supercond.

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“…Integration drift is a side effect occurring when a signal is integrated, arising from the magnification of low-frequency noise components [ 30 ]. The integrated voltage signal, namely the magnetic flux, presents a linear trend in a first-order approximation.…”

Section: Proposalmentioning

confidence: 99%

Rotating-Coil Measurement System for Small-Bore-Diameter Magnet Characterization

Lauria

Arpaïa

Buzio

et al. 2022

Sensors

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Rotating-coil measurement systems are widely used to measure the multipolar fields of particle accelerator magnets. This paper presents a rotating-coil measurement system that aims at providing a complete data set for the characterization of quadrupole magnets with small bore diameters (26 mm). The PCB magnetometer design represents a challenging goal for this type of transducer. It is characterized by an aspect ratio 30% higher than the state of the art, imposed by the reduced dimension of the external radius of the rotating shaft and the necessity of covering the entire magnet effective length (500 mm or higher). The system design required a novel design for the mechanical asset, also considering the innovation represented by the commercial carbon fiber tube, housing the PCB magnetometer. Moreover, the measurement system is based primarily on standard and commercially available components, with simplified control and post-processing software applications. The system and its components are cross-calibrated using a stretched-wire system and another rotating-coil system. The measurement precision is established in a measurement campaign performed on a quadrupole magnet characterized by an inner bore diameter of 45 mm.

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A Continuous PDR and GNSS Fusing Algorithm for Smartphone Positioning

Zhang

et al. 2022

Remote Sensing

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Pedestrian dead reckoning (PDR), used in state-of-the-art smartphones, calculates pedestrian positions by using built-in inertial sensors. However, the complex and changeable usage modes of smartphones have been obstructing the development of PDR in the field of gait detection. Since the measurement of the sensor is affected by noise, position errors will emerge, needing to be corrected periodically via external measurements. To this end, an optimization-based PDR (OBPDR) method for smartphones is proposed in this study. First, an improved finite state machine (IFSM) gait detection method is designed, which can improve the gait recognition rate and stability compared with the traditional peak detection method. Second, the step detection algorithm proposed in this paper is combined with a heading estimation to obtain the PDR dynamic model. Finally, the measurements of GNSS are fused to the PDR model, based on an adaptive extended Kalman filter (AEKF) algorithm, which can enhance the adaptability of the system to the environment in order to reduce the cumulative errors of PDR. Experiments are carried out to evaluate the performance of the proposed method. The results indicate that compared with the gait detection method, based on peak detection, and the integrated positioning method, based on an extended Kalman filter, the proposed method boasts favorable robustness and a high gait recognition rate, the recognition accuracy being kept between 97.5% and 98.5%; the average position error decreased by more than 67.25%.

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Drift-Free Integration in Inductive Magnetic Field Measurements Achieved by Kalman Filtering

Cited by 3 publications

References 28 publications

A Translating-Coil Magnetometer for the Magnetic Measurements of the HL-LHC High-Order Corrector Magnets at Room Temperature

A Translating-Coil Magnetometer for the Magnetic Measurements of the HL-LHC High-Order Corrector Magnets at Room Temperature

Rotating-Coil Measurement System for Small-Bore-Diameter Magnet Characterization

A Continuous PDR and GNSS Fusing Algorithm for Smartphone Positioning

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