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公开(公告)号：US11567105B2
公开(公告)日：2023-01-31
申请号：US17326147
申请日：2021-05-20
IPC分类号： G01R19/00 , G01R13/00 , G01R13/02 , G01R31/28 , G01R31/317
摘要： A device includes a control circuit, a scope circuit, and a time-to-current converter. The control circuit is configured to receive a voltage signal from a voltage-controlled oscillator, delay the voltage signal for a delay time to generate a first control signal, and to generate a second control signal according to the first control signal and the voltage signal. The scope circuit is configured to generate a first current signal in response to the second control signal and the voltage signal. The time-to-current converter is configured generate a second current signal according to the first control signal, the voltage signal, a first switch signal, and a test control signal.
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公开(公告)号：US20230003519A1
公开(公告)日：2023-01-05
申请号：US17831149
申请日：2022-06-02
申请人： NEWPONG Co., Ltd
发明人： Jaeyong LEE
摘要： Provided is a device for measuring the amount of probe displacement using a change in amount of light, the device including: a sensor mounting unit having a sensor and configured to adjust a position so that a probe is provided at a position corresponding to the sensor; a handpiece fixing unit configured to fix a handpiece by means of a through-hole formed at a center of the handpiece fixing unit; and an impedance matching unit configured to generate acoustic impedance to the probe.
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公开(公告)号：US11540763B2
公开(公告)日：2023-01-03
申请号：US16645311
申请日：2017-09-08
发明人： Tongsheng Zhang
摘要： A control method and system for filtering power line interference is disclosed. The control method includes the following steps. First, ECG signals are pre-segmented and rectified; then the sinusoidal frequency, amplitude, and phase of the rectified segmented signals are extracted. These estimated sinusoidal parameters from each recorded channel are weighted by their individual signal to noise ratios before being averaged to achieve the optimal powerline frequency, amplitude, and phase. Based on these optimal sinusoidal parameters, the individual sinusoidal waveform is reconstructed and then is subtracted from the corresponding ECG segment, in order to obtain the clean ECG signals. This method of filtering the powerline interference through removal from recorded signals enables accurate measurement without any ringing effect that could lead to signal distortion issues. Thus this invention solves the ringing problem encountered by traditional notch filter techniques when signal amplitude suddenly changes in a measurement.
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公开(公告)号：US10602082B2
公开(公告)日：2020-03-24
申请号：US14856046
申请日：2015-09-16
申请人： Fluke Corporation
发明人： Michael D. Stuart , Paul H. Heydron , Joseph V. Ferrante , Michael A. Schoch , Hilton G. Hammond
IPC分类号： H04N5/33 , G01R31/302 , H04N5/225 , G01D21/02 , G01R13/00
摘要： Systems can include a test and measurement tool configured to generate measurement data, and imaging tool configured to generate image data, and a processor in communication with the imaging tool and the test and measurement tool. The processor can be configured to receive image data from the imaging tool and, if the image data satisfies one or more predetermined conditions, trigger the test and measurement tool to perform one or more corresponding operations. Similarly, the processor can receive measurement data from the test and measurement tool and, if the measurement data satisfies one or more predetermined conditions trigger the imaging tool to perform one or more corresponding operations.
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公开(公告)号：US10338185B2
公开(公告)日：2019-07-02
申请号：US14576702
申请日：2014-12-19
发明人： Martin J. Rice
摘要： A method for calibrating a test instrument having an initial output voltage level and an open output relay can include programming the test instrument for a certain current level, starting a timer, and stopping the timer (responsive to the test instrument entering compliance) to determine a time interval. The method can also include determining whether the time interval is within a desired range.
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6.发明授权公开(公告)号：US10024897B2
公开(公告)日：2018-07-17
申请号：US14340120
申请日：2014-07-24
发明人： Yilu Liu , Wenxuan Yao , Lingwei Zhan , Wei Gao , Haoyang Lu
摘要： A system may include an electric field sensor, an analog to digital converter, and an estimator. The electric field sensor may measure electric fields of electric power grid. The analog to digital converter may generate digital output based upon measurements from the electric field sensor. The estimator may estimate phasor data of the electric power grid based upon the digital output.
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公开(公告)号：US09946686B2
公开(公告)日：2018-04-17
申请号：US13805782
申请日：2011-06-01
申请人： Friedrich Reich
发明人： Friedrich Reich
CPC分类号： G06F17/00 , G01R13/0218 , G01R19/02
摘要： A measuring device for an oscilloscope provides a decimation unit. The decimation unit provides at least one input, which receives a datastream with a plurality of sampled values from at least one data source. The decimation unit also has at least one output, at which a reduced datastream is output. The reduced datastream is formed from a root-mean-squared value of respectively at least two sampled values calculated by the decimation unit.
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公开(公告)号：US09709606B1
公开(公告)日：2017-07-18
申请号：US15247963
申请日：2016-08-26
申请人： Byung-Hak Cho
发明人： Byung-Hak Cho
CPC分类号： G01R19/04
摘要： The present disclosure provides an electric fence voltmeter having a peak detection type voltage divider. The peak detection type voltage divider has an extremely simple configuration composed of two capacitor voltage dividers and two rectifier diodes for detecting the positive and the negative peak voltages of a high voltage pulse with an additional pulse state voltage having information on the moments the high voltage pulse starts and peaks. Thus, the voltmeter has reduced number of parts with simplified circuits, and is able to measure the peak voltage accurately with a reliable and efficient manner using the pulse state voltage. Thereby the voltmeter has benefits of improved measurement accuracy, reduced production cost, and low battery consumption.
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公开(公告)号：US09212946B2
公开(公告)日：2015-12-15
申请号：US13492435
申请日：2012-06-08
摘要： Methods and systems for creating Campbell diagram displays for illustrating vibration characteristics of a moving apparatus, such as a rotary machine, are provided. Data, representing vibration amplitudes and frequencies are recorded against rotational speeds of an apparatus. The data is used to create waveforms representing the forward and/or reverse vibration frequencies of the apparatus. The waveforms in turn are used to create spectral line envelopes to provide enhanced two dimensional images indicating the amplitudes of the vibrations of the apparatus at particular rotational speeds. The spectral line envelopes may be empty, filled with one or more colors, or other illustration features to impart solidity to the envelopes to enhance visibility.
摘要翻译： 提供了用于创建用于示出诸如旋转机器的移动设备的振动特性的Campbell图示的方法和系统。 相对于设备的转速记录表示振幅和频率的数据。 该数据用于创建表示装置的正向和/或反向振动频率的波形。 这些波形又被用于创建谱线包络，以提供增强的二维图像，指示装置在特定旋转速度下的振动幅度。 光谱线包络可以是空的，填充有一种或多种颜色，或其他图示特征，以赋予信封以实现可见度的可靠性。
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公开(公告)号：US09177399B2
公开(公告)日：2015-11-03
申请号：US13707882
申请日：2012-12-07
CPC分类号： G06T11/206
摘要： In one aspect, a method for displaying measurement information from at least one sensor of a machine is provided. In another aspect, a computing device for displaying measurement information from at least one sensor of a machine is provided. In another aspect, a system for displaying measurement information from at least one sensor of a machine is provided.
摘要翻译： 一方面，提供了一种从机器的至少一个传感器显示测量信息的方法。 另一方面，提供了一种用于从机器的至少一个传感器显示测量信息的计算装置。 另一方面，提供一种用于从机器的至少一个传感器显示测量信息的系统。
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