公开(公告)号：US08289517B2

公开(公告)日：2012-10-16

申请号：US12593172

申请日：2008-03-27

申请人： Andras Miklos ,  Judit Angster

发明人： Andras Miklos ,  Judit Angster

IPC分类号： G01N21/00

CPC分类号： G01N21/1702

摘要： A method for measuring a photoacoustic signal using light sources that emit light at different wavelengths, wherein the method comprises electing a scanning frequency with which signals are recorded, determining a modulation frequency for each light source by dividing the scanning frequency by an integer division value that is different for each light source, exciting a photoacoustic signal in a photoacoustic measuring cell using the light sources and the modulation frequency, measuring, with a sound pressure sensor, a produced sound pressure, digitizing a signal of the sound pressure sensor, determining a signal component assignable to a respective light source by evaluating a sequence of digitized measured values, and filtering out measured value components that occur periodically with a period of a respective modulation frequency.

摘要翻译： 一种使用发射不同波长的光的光源测量光声信号的方法，其中所述方法包括：选择记录信号的扫描频率，通过将扫描频率除以整数除法来确定每个光源的调制频率， 对于每个光源是不同的，使用光源和调制频率激发光声测量单元中的光声信号，用声压传感器测量产生的声压，对声压传感器的信号进行数字化，确定信号 通过评估数字化测量值的序列，并且以相应的调制频率的周期过滤出周期性出现的测量值分量，可以分配给各个光源。

公开(公告)号：US20090183552A1

公开(公告)日：2009-07-23

申请号：US12300952

申请日：2007-05-12

申请人： Judit Angster ,  Andreas Schmohl ,  Andras Miklos

发明人： Judit Angster ,  Andreas Schmohl ,  Andras Miklos

IPC分类号： G01N21/17

CPC分类号： G01N29/348 ,  G01N1/405 ,  G01N21/1702 ,  G01N29/2425 ,  G01N29/4481 ,  G01N2021/1704 ,  G01N2291/021 ,  G01N2291/0423

摘要： A gas detector with a selectively adsorbing surface (3) and an acoustic measuring cell (5) is presented. The detector is characterized in that the selectively adsorbing surface (3) and the acoustic measuring cell (5) can be arranged with respect to one another such that gases desorbed by means of thermal desorption from the adsorbing surface (3) reach the acoustic measuring cell (5) and there trigger a pressure wave that can be measured by one or more acoustic pick-ups (13, 14), in particular microphones, which are arranged in the acoustic measuring cell (5). Furthermore, a corresponding method is provided. The detector is particularly suitable for measuring contaminants in interior spaces and ventilation systems.

摘要翻译： 提出了具有选择性吸附表面（3）和声测量单元（5）的气体检测器。 检测器的特征在于，选择性吸附表面（3）和声学测量单元（5）可以相对于彼此布置，使得通过从吸附表面（3）的热解吸解吸的气体到达声学测量单元 （5），并且触发可以由布置在声测量单元（5）中的一个或多个声拾取器（13,14）特别是麦克风测量的压力波。 此外，提供了相应的方法。 检测器特别适用于测量内部空间和通风系统中的污染物。

公开(公告)号：US20100107733A1

公开(公告)日：2010-05-06

申请号：US12593177

申请日：2008-03-27

申请人： Andras Miklos ,  Judit Angster

发明人： Andras Miklos ,  Judit Angster

IPC分类号： G01N21/84

CPC分类号： G01N21/031 ,  G01N21/1702 ,  G01N2021/1704 ,  G01N2201/08

摘要： The invention relates to a photoacoustic multipass cell with a light source and means (3) for reflecting light in an acoustic resonator (8), which means are embodied in a concentrating manner, wherein the light source is arranged between the means designed in a concentrating manner. Two spherical mirrors (3) with a common optical axis can be used as a means for reflecting the light. The light source is represented by a fiber (5) guided into the multipass cell or a laser diode.

摘要翻译： 本发明涉及一种具有光源的光声多通道单元和用于在声谐振器（8）中反射光的装置（3），该装置以集中方式体现，其中光源被布置在设计在集中 方式。 具有公共光轴的两个球面镜（3）可以用作反射光的装置。 光源由引导到多通道单元中的光纤（5）或激光二极管表示。

公开(公告)号：US20100107732A1

公开(公告)日：2010-05-06

申请号：US12593145

申请日：2008-03-27

申请人： Prof. Andras Miklos ,  Judit Angster

发明人： Prof. Andras Miklos ,  Judit Angster

IPC分类号： G01N21/17

CPC分类号： G01N21/1702 ,  G01N21/031 ,  G01N2021/1704

摘要： A device is presented for photoacoustic detection, having a cylindrical acoustic resonator (1), in which means (3a-d) are present for guiding the excitation light such that the sound wave that can be excited by absorption of the excitation light is the second azimuthal resonance of the cylinder oscillation.

摘要翻译： 提供了用于光声检测的装置，具有圆柱形声共振器（1），其中存在用于引导激发光的装置（3a-d），使得可以通过吸收激发光而激发的声波是第二 圆柱振荡的方位共振。

公开(公告)号：US08479559B2

公开(公告)日：2013-07-09

申请号：US12593145

申请日：2008-03-27

申请人： Andras Miklos ,  Judit Angster

发明人： Andras Miklos ,  Judit Angster

IPC分类号： G01N21/17 ,  G01N23/06 ,  G01J5/58

CPC分类号： G01N21/1702 ,  G01N21/031 ,  G01N2021/1704

摘要： A photoacoustic detection device includes a cylindrical acoustic resonator having an arrangement for guiding light essentially perpendicular to a cylinder axis in such a manner that a second azimuthal resonance of cylinder oscillation is excitable by absorption of the light.

摘要翻译： 光声检测装置包括具有用于引导基本上垂直于气缸轴线的光的布置的圆柱形声谐振器，使得气缸振荡的第二方位共振可通过吸收光而被激发。

公开(公告)号：US08115931B2

公开(公告)日：2012-02-14

申请号：US12593163

申请日：2008-03-27

申请人： Andras Miklos ,  Judit Angster

发明人： Andras Miklos ,  Judit Angster

IPC分类号： G01N21/00

CPC分类号： G01N29/2425 ,  F01N2560/05 ,  G01N21/1702 ,  G01N29/228 ,  G01N2015/0046 ,  G01N2021/1704 ,  G01N2291/0217 ,  G01N2291/02408 ,  G01N2291/02809 ,  G01N2291/045

摘要： A photoacoustic detector for measuring a concentration of fine dust particles in gas. The detector includes at least one acoustic sensor for detecting an acoustic signal. Additionally, the detector includes a pulsed light source for providing excitation light having a configurable pulse length and a configurable pulse repetition rate, wherein by changing the pulse length and/or the pulse repetition rate, a size distribution of the fine dust particles can be determined.

摘要翻译： 一种用于测量气体中细粉尘颗粒浓度的光声检测器。 检测器包括用于检测声信号的至少一个声传感器。 此外，检测器包括用于提供具有可配置脉冲长度和可配置脉冲重复频率的激发光的脉冲光源，其中通过改变脉冲长度和/或脉冲重复率，可以确定细粉尘颗粒的尺寸分布 。

公开(公告)号：US20100101305A1

公开(公告)日：2010-04-29

申请号：US12593154

申请日：2008-03-27

申请人： Prof. Andras Miklos ,  Judit Angster

发明人： Prof. Andras Miklos ,  Judit Angster

IPC分类号： G01N21/00

CPC分类号： G01N21/1702 ,  G01N2021/1704

摘要： A photoacoustic detector is presented having the following structure: a first and a second light source (1a, b) for providing light of the same intensity while retaining the same spectral distribution; a first beam path allocated to the first light source (1a) and at least one second beam path allocated to the at least one second light source (1b), wherein a different absorption of light can occur in the first and second beam paths in selected wavelength ranges; means (4) for alternately guiding light from the first and from the at least one second beam path into a photoacoustic measuring cell (6), the intensity of the light sources being constant in such a way that the temporal change thereof cannot generate a photoacoustic signal that distorts the measurement.

摘要翻译： 具有以下结构的光声检测器：第一和第二光源（1a，b），用于提供具有相同强度的光，同时保持相同的光谱分布; 分配给第一光源（1a）的第一光束路径和分配给至少一个第二光源（1b）的至少一个第二光束路径，其中在所选择的第一和第二光束路径中可以在第一和第二光束路径中发生不同的光吸收 波长范围 用于将来自所述第一和从所述至少一个第二光束路径的光交替引导到光声测量单元（6）中的装置（4），所述光源的强度是恒定的，使得其时间变化不能产生光声 信号扭曲测量。

公开(公告)号：US08359903B2

公开(公告)日：2013-01-29

申请号：US12593154

申请日：2008-03-27

申请人： Andras Miklos ,  Judit Angster

发明人： Andras Miklos ,  Judit Angster

IPC分类号： G01N21/85 ,  G01N29/036

CPC分类号： G01N21/1702 ,  G01N2021/1704

摘要： A photoacoustic detector for providing a measurement, includes a first light source and a second light source each configured to provide light of a same intensity while retaining a same spectral distribution. Additionally, the photoacoustic detector includes a first beam path allocated to the first light source and at least one second beam path allocated to the second light source, wherein a different absorption of light occurs in the first path and the second beam path in at least one selected wavelength range. Further, the photoacoustic detector includes a photoacoustic measuring cell; and a mechanism for alternately guiding light from the first beam path and from the second beam path into the photoacoustic measuring cell. When alternately guiding light from the first beam path and from the second beam path into the photoacoustic measuring cell, the same intensity of the first light source and the second light source prevents generation of a photoacoustic signal due to light source intensity variation that distorts the measurement.

摘要翻译： 用于提供测量的光声检测器包括第一光源和第二光源，每个光源和第二光源被配置为在保持相同的光谱分布的同时提供相同强度的光。 此外，光声检测器包括分配给第一光源的第一光束路径和分配给第二光源的至少一个第二光束路径，其中在第一路径和第二光束路径中发生不同的光吸收，至少一个 选择波长范围。 此外，光声检测器包括光声测量单元; 以及用于交替地将来自第一光束路径的光和从第二光束路径引导到光声测量单元中的机构。 当将来自第一光束路径和第二光束路径的光交替地引导到光声测量单元中时，第一光源和第二光源的相同强度防止由于光源强度变化而导致的光声信号的产生，从而使测量 。

公开(公告)号：US20100045991A1

公开(公告)日：2010-02-25

申请号：US12593172

申请日：2008-03-27

申请人： Andras Miklos ,  Judit Angster

发明人： Andras Miklos ,  Judit Angster

IPC分类号： G01N21/17

CPC分类号： G01N21/1702

摘要： The application relates to a method for measuring the photoacoustic signal in a photoacoustic cell (4) with several light sources (5,6,7,8) that emit light at different wavelengths. The method comprises the following steps: Select a scanning frequency with which the signals are digitized; determine a modulation frequency for each light source (5, 6, 7, 8) by dividing the scanning frequency by an integer division value that is different for each light source (5, 6, 7, 8); simultaneous excitation with the light sources (5, 6, 7, 8), which respectively emit light at a different wavelength with the determined modulation frequency, wherein the produced sound pressure is measured by means of a sound pressure sensor (3), and the sound signal thus obtained is digitized; determine the absorption value to be assigned to the respective light source by evaluating a sequence of digitized measured values, the number of which corresponds to the product of a selected multiplication value and the division value, by means of a calculation method that filters out the measured value components that occur periodically with the period of the modulation frequency.

摘要翻译： 本申请涉及一种用于测量具有发射不同波长的光的多个光源（5,6,7,8）的光声单元（4）中的光声信号的方法。 该方法包括以下步骤：选择信号被数字化的扫描频率; 通过将扫描频率除以对于每个光源（5,6,7,8）不同的整数除法来确定每个光源（5,6,7,8）的调制频率; 用分别以确定的调制频率发射不同波长的光的光源（5,6,7,8）同时激励，其中通过声压传感器（3）测量所产生的声压，并且 如此获得的声音信号被数字化; 通过计算方法，通过计算所计算出的测量值的计算方法，通过评估与所选择的乘积值和除法值的乘积相对应的数字化测量值的序列来确定要分配给各个光源的吸收值 值分量与调制频率的周期周期性地发生。

公开(公告)号：US08534129B2

公开(公告)日：2013-09-17

申请号：US12593177

申请日：2008-03-27

申请人： Andras Miklos ,  Judit Angster

发明人： Andras Miklos ,  Judit Angster

IPC分类号： G01H9/00

CPC分类号： G01N21/031 ,  G01N21/1702 ,  G01N2021/1704 ,  G01N2201/08

摘要： A photoacoustic multipass cell includes a light source, an acoustic resonator and a reflecting arrangement configured in a concentrating manner for reflecting light into the acoustic resonator. Additionally, the light source is arranged at least partially within the reflecting arrangement.

摘要翻译： 光声多通道单元包括光源，声谐振器和以集中方式配置以将光反射入声谐振器的反射装置。 另外，光源至少部分地布置在反射装置内。