公开(公告)号：WO2017167378A1

公开(公告)日：2017-10-05

申请号：PCT/EP2016/057099

申请日：2016-03-31

Applicant: DANFOSS A/S

Inventor： JESPERSEN, Lars ,  STÆR, Torben ,  STEFFENSEN, Henrik, Bork

IPC: G01F1/66

Abstract: The invention relates to a method and a system (1 ) for sampling an ultrasonic signal, comprising two ultrasonic transducers (2, 3) arranged in a fluid path connected to a control unit (4). Task of the invention is to provide a method and a system for sampling an ultrasonic signal that allows to obtain a higher resolution digital output signal without the need for an analog-to-digital converter with a high sampling frequency. The task is solved by a method comprising the following steps: a) Sending an input electric signal from the control unit (4) to a first ultrasonic transducer (2), transforming the input electric signal to an ultrasonic signal and sending it to a second ultrasonic transducer (3) through the flow path, b) transforming the received ultrasonic signal at the second ultrasonic transducer (3) to an output electric signal that is sent to the control unit (4), c) sampling the output electric signal received at the control unit to a first series of digital samples at a sampling frequency, d) repeating steps a) to c) at least once with the same electric input electric signal, wherein in step c) the time of start of the sampling measured from the time of start of the respective input electric signal and/or the sampling frequency is different from the previous sampling, e) combining the obtained series of samples to obtain a combined digital output signal.

Abstract translation: 本发明涉及一种用于对超声信号进行采样的方法和系统（1），其包括布置在连接到控制单元（4）的流体路径中的两个超声换能器（2,3）。 本发明的任务是提供一种用于采样超声信号的方法和系统，其允许获得更高分辨率的数字输出信号，而不需要具有高采样频率的模数转换器。 该任务通过包括以下步骤的方法来解决：a）从控制单元（4）向第一超声换能器（2）发送输入电信号，将输入电信号转换为超声信号并将其发送到第二 b）将在第二超声换能器（3）处接收到的超声信号转换为发送到控制单元（4）的输出电信号，c）对在第一超声换能器（3）处接收的输出电信号进行采样， 所述控制单元以采样频率接收第一系列数字样本，d）用相同的电输入电信号重复步骤a）至c）至少一次，其中在步骤c）中，从所述第一系列数字样本测量的采样开始时间 相应输入电信号的开始时间和/或采样频率不同于先前的采样，e）组合所获得的一系列采样以获得组合的数字输出信号。

公开(公告)号：EP3436788B1

公开(公告)日：2020-02-26

申请号：EP16714373.4

申请日：2016-03-31

Applicant: Danfoss A/S

Inventor： JESPERSEN, Lars ,  STÆR, Torben ,  STEFFENSEN, Henrik Bork

IPC: G01F1/66

公开(公告)号：EP3436788A1

公开(公告)日：2019-02-06

申请号：EP16714373.4

申请日：2016-03-31

Applicant: Danfoss A/S

Inventor： JESPERSEN, Lars ,  STÆR, Torben ,  STEFFENSEN, Henrik, Bork

IPC: G01F1/66

Abstract: The invention relates to a method and a system (1 ) for sampling an ultrasonic signal, comprising two ultrasonic transducers (2, 3) arranged in a fluid path connected to a control unit (4). Task of the invention is to provide a method and a system for sampling an ultrasonic signal that allows to obtain a higher resolution digital output signal without the need for an analog-to-digital converter with a high sampling frequency. The task is solved by a method comprising the following steps: a) Sending an input electric signal from the control unit (4) to a first ultrasonic transducer (2), transforming the input electric signal to an ultrasonic signal and sending it to a second ultrasonic transducer (3) through the flow path, b) transforming the received ultrasonic signal at the second ultrasonic transducer (3) to an output electric signal that is sent to the control unit (4), c) sampling the output electric signal received at the control unit to a first series of digital samples at a sampling frequency, d) repeating steps a) to c) at least once with the same electric input electric signal, wherein in step c) the time of start of the sampling measured from the time of start of the respective input electric signal and/or the sampling frequency is different from the previous sampling, e) combining the obtained series of samples to obtain a combined digital output signal.