公开(公告)号：US20120188549A1

公开(公告)日：2012-07-26

申请号：US13189303

申请日：2011-07-22

申请人： Yousuke Hoshino ,  Kenji Takubo ,  Naoji Moriya

发明人： Yousuke Hoshino ,  Kenji Takubo ,  Naoji Moriya

IPC分类号： G01N21/00

CPC分类号： G01N21/3504 ,  G01N21/39

摘要： A gas concentration measurement device which utilizes a TDLAS measurement method, and in which the phase-sensitive detection can be performed by digital processing using an integer-arithmetic device, is provided. In the gas concentration measurement device according to the present invention, AC components corresponding to integer multiples of a modulation frequency f contained in an input signal are removed by taking a moving average of data obtained from an output signal of a multiplier 62 for a period of time corresponding to one cycle of the modulation frequency f. As a result, a DC component in the output signal of a digital filter 63 relatively increases, making it easier to extract the DC component by a digital low-pass filter 64, so that a sufficiently accurate phase-sensitive detection can be made even if a digital processing based on integer arithmetic is used.

摘要翻译： 提供一种利用TDLAS测量方法的气体浓度测量装置，并且其中可以通过使用整数运算装置的数字处理来执行相位敏感检测。 在根据本发明的气体浓度测量装置中，通过从乘法器62的输出信号获得的数据的移动平均值去除与输入信号中包含的调制频率f的整数倍相对应的AC分量， 时间对应于调制频率f的一个周期。 结果，数字滤波器63的输出信号中的DC分量相对增加，使得更容易通过数字低通滤波器64提取DC分量，从而即使可以进行足够精确的相敏检测 使用基于整数运算的数字处理。

公开(公告)号：US08508739B2

公开(公告)日：2013-08-13

申请号：US13189303

申请日：2011-07-22

申请人： Yousuke Hoshino ,  Kenji Takubo ,  Naoji Moriya

发明人： Yousuke Hoshino ,  Kenji Takubo ,  Naoji Moriya

IPC分类号： G01N21/59

CPC分类号： G01N21/3504 ,  G01N21/39

摘要： A gas concentration measurement device which utilizes a TDLAS measurement method, and in which the phase-sensitive detection can be performed by digital processing using an integer-arithmetic device, is provided. In the gas concentration measurement device according to the present invention, AC components corresponding to integer multiples of a modulation frequency f contained in an input signal are removed by taking a moving average of data obtained from an output signal of a multiplier 62 for a period of time corresponding to one cycle of the modulation frequency f . As a result, a DC component in the output signal of a digital filter 63 relatively increases, making it easier to extract the DC component by a digital low-pass filter 64, so that a sufficiently accurate phase-sensitive detection can be made even if a digital processing based on integer arithmetic is used.

摘要翻译： 提供一种利用TDLAS测量方法的气体浓度测量装置，并且其中可以通过使用整数运算装置的数字处理来执行相位敏感检测。 在根据本发明的气体浓度测量装置中，通过从乘法器62的输出信号获得的数据的移动平均值去除与输入信号中包含的调制频率f的整数倍相对应的AC分量， 时间对应于调制频率f的一个周期。 结果，数字滤波器63的输出信号中的DC分量相对增加，使得更容易通过数字低通滤波器64提取DC分量，从而即使可以进行足够精确的相敏检测 使用基于整数运算的数字处理。