ACOUSTIC STRUCTURAL REFLECTION INTERFERENCE MITIGATION SYSTEMS, METHODS, AND DEVICES

    公开(公告)号:US20180313865A1

    公开(公告)日:2018-11-01

    申请号:US15957646

    申请日:2018-04-19

    申请人: Anemoment LLC

    IPC分类号: G01P5/24 G01P13/02

    摘要: Methods, systems, and devices for acoustic structural reflection interference mitigation are provided in accordance with various embodiments. For example, some embodiments may provide for structural reflection interference mitigation for compact three-dimensional ultrasonic anemometers. Some embodiments include a method that may include transmitting a first acoustic signal from a first acoustic transmitter. At least a first portion of the first acoustic signal from the first acoustic transmitter may be hindered from being received at a first acoustic receiver. At least a second portion of the first acoustic signal from the first acoustic transmitter may be received at the first acoustic receiver along an acoustic propagation path. In some embodiments, the first acoustic transmitter may include a wide-beam transmitter. Some embodiments may utilize four wide-beam transducers positioned at apices of a tetrahedron.

    POSITION DETECTING DEVICE
    6.
    发明申请

    公开(公告)号:US20170370961A1

    公开(公告)日:2017-12-28

    申请号:US15629084

    申请日:2017-06-21

    申请人: SMC CORPORATION

    摘要: At a time that a position detecting device is initiated, an arithmetic processing unit calculates the absolute position of a rotating shaft at the time of initiation, on the basis of first to third analog signals corresponding to first to third angles of rotation, which are detected respectively by first to third rotational angle detectors. During rotation of the rotating shaft, a current position counter detects a current absolute position of the rotating shaft by counting a number of pulses of forward rotation pulses or reverse rotation pulses, corresponding to the first angle of rotation detected by the first rotational angle detector, taking as a standard a total number of pulses corresponding to the absolute position of the rotating shaft at the time of initiation.