VIBRATION SENSORS
    1.
    发明公开
    VIBRATION SENSORS 审中-公开

    公开(公告)号:US20230384147A1

    公开(公告)日:2023-11-30

    申请号:US18365976

    申请日:2023-08-05

    CPC classification number: G01H3/06 H04R1/083 H04R9/18 H04R9/046

    Abstract: Vibration sensors are provided. The vibration sensor may include: a vibration assembly, the vibration assembly including a mass element and an elastic element, and the mass element being connected to the elastic element; a first acoustic cavity, the elastic element constituting one of sidewalls of the first acoustic cavity, and the vibration assembly vibrating to make a volume of the first acoustic cavity change in response to an external vibration signal; an acoustic transducer, the acoustic transducer being in communication with the first acoustic cavity and the acoustic transducer generating an electrical signal in response to a volume change of the first acoustic cavity; and a buffer, the buffer limiting a vibration amplitude of the vibration assembly, wherein the acoustic transducer has a first resonance frequency, the vibration assembly has a second resonance frequency, and the second resonance frequency of the vibration assembly is smaller than the first resonance frequency.

    MEASURING METHOD FOR MEASURING LASER SCANNING VELOCITY
    4.
    发明申请
    MEASURING METHOD FOR MEASURING LASER SCANNING VELOCITY 审中-公开
    测量激光扫描速度的测量方法

    公开(公告)号:US20160091600A1

    公开(公告)日:2016-03-31

    申请号:US14856862

    申请日:2015-09-17

    CPC classification number: G01S11/14 G01H3/06 G01S15/586

    Abstract: Provided is a measuring method for measuring laser scanning velocity for a laser beam machining apparatus. The laser beam machining apparatus includes a mirror, and is configured to process a work by irradiating laser. The laser is irradiated by operating the mirror. The measuring method includes measuring processing sound of the work by the laser using the laser beam machining apparatus. Further, the measuring method includes calculating scanning velocity of the laser by analyzing a frequency of the measured processing sound using the laser beam machining apparatus.

    Abstract translation: 提供了一种用于激光束加工装置的激光扫描速度测量方法。 激光束加工装置包括反射镜,并且被配置为通过照射激光来处理工件。 通过操作镜子照射激光。 测量方法包括使用激光束加工设备测量激光的工作处理声音。 此外,测量方法包括通过使用激光束加工设备分析所测量的处理声音的频率来计算激光的扫描速度。

    OSCILLATION FREQUENCY MEASURING SYSTEM AND METHOD FOR A MEMS SENSOR
    5.
    发明申请
    OSCILLATION FREQUENCY MEASURING SYSTEM AND METHOD FOR A MEMS SENSOR 有权
    振动频率测量系统和MEMS传感器的方法

    公开(公告)号:US20150000402A1

    公开(公告)日:2015-01-01

    申请号:US14303522

    申请日:2014-06-12

    CPC classification number: B81C1/0015 B81C2203/075 G01H3/06 G01H9/00

    Abstract: A MEMS sensor has at least a movable element designed to oscillate at an oscillation frequency, and an integrated measuring system coupled to the movable element to provide a measure of the oscillation frequency. The measuring system has a light source to emit a light beam towards the movable element and a light detector to receive the light beam reflected back from the movable element, including a semiconductor photodiode array. In particular, the light detector is an integrated photomultiplier having an array of single photon avalanche diodes.

    Abstract translation: MEMS传感器至少具有设计成以振荡频率振荡的可移动元件,以及耦合到可移动元件的集成测量系统,以提供振荡频率的测量。 测量系统具有向可动元件发射光束的光源和用于接收从包括半导体光电二极管阵列的可移动元件反射回的光束的光检测器。 特别地,光检测器是具有单光子雪崩二极管阵列的集成光电倍增管。

    Acoustic measurement
    6.
    发明授权
    Acoustic measurement 失效
    声学测量

    公开(公告)号:US3912880A

    公开(公告)日:1975-10-14

    申请号:US48624074

    申请日:1974-07-05

    CPC classification number: H04R29/001 G01H3/06 H04R29/004

    Abstract: The frequency response of a microphone can be measured by feeding an acoustic spectrum generated from a pseudo-random bit sequence generator into the microphone and analysing the output using a Fourier analyser. The acoustic spectrum generator is portable and battery operated. A phase locked oscillator system is used to enable the output of a microphone under test to be analysed even after recording on magnetic tape. The device ensures that the sampling rate of the analogue to digital converter feeding the Fourier analyser is locked onto the drive frequency of the pseudo-random bit sequence generator.

    Accident sound detection circuit
    9.
    发明授权
    Accident sound detection circuit 失效
    事故声检测电路

    公开(公告)号:US6087960A

    公开(公告)日:2000-07-11

    申请号:US328794

    申请日:1999-06-09

    CPC classification number: G01H3/08 G01H3/06 G01V1/001

    Abstract: An accident sound detection circuit includes an accident sound detection block that detects an accident sound from a sound signal inputted from an environmental sound detection unit and outputs an accident sound detection signal a power spectrum calculator for obtaining a power spectrum in regard to a sound signal when acquiring the accident sound detection signal outputted from the accident sound detection block as a trigger signal, a spectrum pattern calculator for forming a pattern of the power spectrum, and a pattern comparator circuit for comparing the formed spectrum pattern and a set pattern set in a pattern generating circuit beforehand and generating a final accident sound detection signal if the patterns coincide with each other.

    Abstract translation: 意外声音检测电路包括:意外声音检测块,其从环境声音检测单元输入的声音信号中检测出事故声音,并输出事故声音检测信号;功率谱计算器,用于获得关于声音信号的功率谱; 获取从事故声音检测块输出的事故声音检测信号作为触发信号,用于形成功率谱图案的频谱图案计算器,以及用于比较形成的频谱图案和以图案设定的设定模式的模式比较器电路 预先产生电路,并且如果图案彼此一致,则产生最终事故声音检测信号。

    Outdoor noise testing system
    10.
    发明授权
    Outdoor noise testing system 失效
    室外噪声测试系统

    公开(公告)号:US6041657A

    公开(公告)日:2000-03-28

    申请号:US997437

    申请日:1997-12-23

    CPC classification number: G01H3/06 G01H11/06

    Abstract: Apparatus for automatically determining the total sound power emitted by a work machine. The noise testing system employs a processor and remote control to control the measurement of both exterior and interior sound generated by a work machine in either a dynamic or static operating mode.

    Abstract translation: 用于自动确定工作机发出的总声功率的装置。 噪声测试系统采用处理器和遥控器来控制工作机器在动态或静态操作模式下产生的外部和内部声音的测量。

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