公开(公告)号：US20240125813A1

公开(公告)日：2024-04-18

申请号：US18486359

申请日：2023-10-13

Applicant: SEIKO EPSON CORPORATION

Inventor： Ryuji Kihara ,  Mikimoto Jin ,  Ryoichi Nozawa

IPC: G01P15/08 ,  G01P3/02 ,  G01P15/18

CPC classification number: G01P15/08 ,  G01P3/02 ,  G01P15/18

Abstract: An inertial sensor unit includes a first board on which a plurality of inertial sensor modules are mounted, and a second board on which a processing circuit configured to process signals from a plurality of inertial sensor modules is mounted.

公开(公告)号：US11276255B2

公开(公告)日：2022-03-15

申请号：US16318051

申请日：2017-07-14

Applicant: CAMBRIDGE MOBILE TELEMATICS, INC.

Inventor： William Francis Bradley ,  Lewis David Girod ,  Hari Balakrishnan ,  Greg Padowski

IPC: G07C5/04 ,  G07C5/10 ,  G01N29/44 ,  G01P3/02 ,  G06Q40/08 ,  G01P3/48 ,  G01P3/50 ,  G01C21/16 ,  G07C5/00

Abstract: An approach to determining vehicle usage makes use of a sensor that provides a vibration signal associated with the vehicle, and that vibration signal is used to infer usage. Usage can include distance traveled, optionally associated with particular ranges of speed or road type. In a calibration phase, auxiliary measurements, for instance based on GPS signals, are used to determine a relationship between the vibration signal and usage. In a monitoring phase, the determined relationship is used to infer usage from the vibration signal.

公开(公告)号：US10768145B2

公开(公告)日：2020-09-08

申请号：US15381547

申请日：2016-12-16

Applicant: Seiko Epson Corporation

Inventor： Yoshihiro Kobayashi

IPC: G01N29/11 ,  G01N29/44 ,  G01P3/64 ,  G01P3/02

Abstract: A conversion section converts a change in signal information outputted from a vibration detector provided on a structural body from the change in the function of time into the change in the function of the distance between a moving object that moves on the structural body and the vibration detector. An attenuation characteristic calculation section calculates an attenuation characteristic of the structural body based on the signal information so converted as to represent the change in the function of the distance.

公开(公告)号：US10557937B2

公开(公告)日：2020-02-11

申请号：US14378897

申请日：2013-02-04

Applicant: Nippon Yusen Kabushiki Kaisha

Inventor： Hideyuki Ando ,  Masatoshi Hori ,  Ryo Kakuta

IPC: G01S15/88 ,  B63B49/00 ,  G01S15/60 ,  G01P5/24 ,  G01P3/02 ,  G01P3/26 ,  G01P3/50 ,  B63J99/00

Abstract: A ship's speed meter for measuring a speed relative to the water of a ship 10, the ship's speed meter including a wave transmitter 1 for emitting a sound wave toward a sea bottom 20, a wave receiver 2 for detecting a plurality of reflected waves, which are reflected waves of the sound wave having been emitted from the wave transmitter 1, reflected by a plurality of reflecting objects 30 positioned at different water depths, and an arithmetic processing unit 4 for calculating a ship's speed relative to the water of the ship 10 based on a frequency difference of the sound wave and the reflected wave. The arithmetic processing unit 4 obtains a change rate of a current velocity in a water depth direction by obtaining current velocities at a plurality of different water depths based on a frequency difference between the sound wave and the plurality of reflected waves, and calculates a current velocity at a water depth at which the change rate is smaller than or equal to a threshold value as the ship's speed relative to the water of the ship 10.

公开(公告)号：US10546502B2

公开(公告)日：2020-01-28

申请号：US15672820

申请日：2017-08-09

Applicant: Gatekeeper Systems, Inc.

Inventor： Scott J. Carter ,  Stephen E. Hannah ,  Jesse M. James ,  Narayanan V. Ramanathan

IPC: B62B5/04 ,  G08G1/00 ,  G06Q10/00 ,  G05D1/02 ,  G01S5/00 ,  G01P3/48 ,  G01H11/08 ,  B60T7/18 ,  B60T7/12 ,  B62B3/14 ,  G01C21/20 ,  B62B5/00 ,  G01C17/00 ,  G01P3/02

Abstract: Examples of systems and methods for locating movable objects such as carts (e.g., shopping carts) are disclosed. Such systems and methods can use dead reckoning techniques to estimate the current position of the movable object. Various techniques for improving accuracy of position estimates are disclosed, including compensation for various error sources involving the use of magnetometer and accelerometer, and using vibration analysis to derive wheel rotation rates. Also disclosed are various techniques to utilize characteristics of the operating environment in conjunction with or in lieu of dead reckoning techniques, including characteristic of environment such as ground texture, availability of signals from radio frequency (RF) transmitters including precision fix sources. Such systems and methods can be applied in both indoor and outdoor settings and in retail or warehouse settings.

公开(公告)号：US20190263634A1

公开(公告)日：2019-08-29

申请号：US16283238

申请日：2019-02-22

Applicant: Otis Elevator Company

Inventor： Lifei Cheng ,  Zhaoxia Hu

IPC: B66B27/00 ,  G01P3/02

Abstract: A speed monitoring device and a passenger conveying device. The speed monitoring device includes a transmission rotor disposed on a shaft side surface of a shaft of which the speed is to be measured and rotating with rotation of the shaft of which the speed is to be measured; an encoder having an input shaft, the input shaft of the encoder being connected to the transmission rotor and rotating with rotation of the transmission rotor; and a mounting bracket for securing the transmission rotor and the encoder to a position where they are to be mounted.

公开(公告)号：US20190236859A1

公开(公告)日：2019-08-01

申请号：US16318051

申请日：2017-07-14

Applicant: CAMBRIDGE MOBILE TELEMATICS, INC.

Inventor： William Francis Bradley

IPC: G07C5/04 ,  G07C5/10 ,  G06Q40/08 ,  G01N29/44 ,  G01P3/02

CPC classification number: G07C5/04 ,  G01N29/4454 ,  G01P3/02 ,  G06Q40/08 ,  G07C5/008 ,  G07C5/10

Abstract: An approach to determining vehicle usage makes use of a sensor that provides a vibration signal associated with the vehicle, and that vibration signal is used to infer usage. Usage can include distance traveled, optionally associated with particular ranges of speed or road type. In a calibration phase, auxiliary measurements, for instance based on GPS signals, are used to determine a relationship between the vibration signal and usage. In a monitoring phase, the determined relationship is used to infer usage from the vibration signal.

公开(公告)号：US20190128108A1

公开(公告)日：2019-05-02

申请号：US16096829

申请日：2017-04-19

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Benjamin Peter Jeffryes

IPC: E21B47/00 ,  E21B4/02 ,  G01P3/02 ,  G01P3/44

Abstract: A method for determining a rotational frequency of a positive displacement motor positioned in a downhole portion of a drill string, the method including: providing at least one measurement device for measuring a property of a part of the drill string; providing a processor for processing a signal output by the at least one measurement device; operating the positive displacement motor whilst the part of the drill string is in a non-driven state; receiving the signal at the processor; determining, using the processor, a frequency spectrum of the signal; and determining the rotational frequency of the positive displacement motor by: identifying a peak in the frequency spectrum in a pre-determined frequency range associated with an expected rotational frequency of the positive displacement motor; and/or identifying a peak in the frequency spectrum having a pre-determined peak width associated with an expected rotational frequency of the positive displacement motor.

公开(公告)号：US20180340954A1

公开(公告)日：2018-11-29

申请号：US15762780

申请日：2016-09-21

Applicant: DENSO CORPORATION

Inventor： Hirotsugu ISHINO

IPC: G01P3/02

Abstract: A rotation speed detection device includes a blade detection sensor located in a housing of a turbocharger and that outputs an output voltage that fluctuates according to an approaching of a blade of a compressor wheel to the blade detection sensor and a separation of the blade from the blade detection sensor, and a sensor circuit to binarize an output signal of the blade detection sensor into a high signal and a low signal and to output the signals. The sensor circuit includes a low pass filter to cut off a high frequency component of the output signal by an analog filter or a digital filter, a high pass filter to cut off a low frequency component of the output signal by a digital filter, and a control unit to increase a cut-off frequency of the high pass filter in accordance with an increase in rotation speed of the turbocharger.

公开(公告)号：US09939456B2

公开(公告)日：2018-04-10

申请号：US14489302

申请日：2014-09-17

Applicant: CASIO COMPUTER CO., LTD.

Inventor： Tomoaki Nagasaka

IPC: A63B24/00 ,  G01P15/04 ,  G01P3/02 ,  G01P15/18 ,  G01P3/64 ,  G06F19/00 ,  G06K9/00 ,  A61B5/11

CPC classification number: G01P3/64 ,  A61B5/1126 ,  A61B2562/0219 ,  G06F19/00 ,  G06F19/3481 ,  G06K9/00342 ,  G16H20/30

Abstract: In an exercise support device of the present invention, acceleration signals in three axis directions including vertical, longitudinal, and lateral directions corresponding to the motion of a user performing exercise of cyclically moving feet are obtained, and a first maximum value in one cycle of a foot movement in the vertical acceleration signal is obtained. Subsequently, a search is made for first and second change points related to foot landing and takeoff motions in a composite acceleration signal obtained by combining acceleration signals in at least two axis directions, in forward and backward directions of the time point of a second maximum value of the composite acceleration signal, within the cycle. Then, a time period between the first and second change points is obtained as a change point interval, and a foot landing period while exercising is calculated based on the first maximum value and the change point interval.