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1.发明申请公开(公告)号：US20160262621A1
公开(公告)日：2016-09-15
申请号：US15065089
申请日：2016-03-09
申请人： U.S.A. as represented by the Administrator of the National Aeronautics and Space Administration
CPC分类号： A61B5/0051 , A61B5/031 , A61B5/7246 , A61B5/7278
摘要： Systems and methods for measuring phase dynamics and other properties (e.g. intracranial pressure) are disclosed. For example, the system may generate a reference waveform and a measurement waveform using digital synthesizers, each waveform having an identical constant frequency but also a relative phase shift. Next, system may send a tone-burst, via a transducer, into a sample (e.g. a skull or a bonded material), and then receive a reflected tone-burst in response. Then, a phase difference between the received tone-burst and the measurement waveform may be determined with a linear phase detector. Next, the phase shift of the measurement waveform may be adjusted, by the determined phase difference, such that there is no longer any phase difference between the received tone-burst and the adjusted measurement waveform generated by the appropriate digital synthesizer. A similar adjustment may occur after subsequent tone-bursts, allowing accurate monitoring of continuously variable phase relationships.
摘要翻译： 公开了用于测量相位动力学和其他性质（例如颅内压）的系统和方法。 例如，系统可以使用数字合成器产生参考波形和测量波形，每个波形具有相同的恒定频率，但是也可以是相对相移。 接下来，系统可以经由换能器将音调脉冲串发送到样本（例如颅骨或粘合材料）中，然后响应地接收反射的音调脉冲串。 然后，可以用线性相位检测器来确定接收的音调脉冲串与测量波形之间的相位差。 接下来，可以通过所确定的相位差来调整测量波形的相移，使得接收的音调脉冲串与由适当的数字合成器产生的经调整的测量波形之间不再有任何相位差。 在随后的音调突发之后可能发生类似的调整，允许精确地监视连续可变的相位关系。
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公开(公告)号：US10390704B2
公开(公告)日：2019-08-27
申请号：US15065089
申请日：2016-03-09
摘要： Systems and methods for measuring phase dynamics and other properties (e.g. intracranial pressure) are disclosed. For example, the system may generate a reference waveform and a measurement waveform using digital synthesizers, each waveform having an identical constant frequency but also a relative phase shift. Next, system may send a tone-burst, via a transducer, into a sample (e.g. a skull or a bonded material), and then receive a reflected tone-burst in response. Then, a phase difference between the received tone-burst and the measurement waveform may be determined with a linear phase detector. Next, the phase shift of the measurement waveform may be adjusted, by the determined phase difference, such that there is no longer any phase difference between the received tone-burst and the adjusted measurement waveform generated by the appropriate digital synthesizer. A similar adjustment may occur after subsequent tone-bursts, allowing accurate monitoring of continuously variable phase relationships.
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