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1. 发明申请

US20090154521A1 Non-contact method and apparatus for hardness case depth monitoring 失效
标题翻译：用于硬度情况深度监测的非接触式方法和装置
公开(公告)号：US20090154521A1
公开(公告)日：2009-06-18
申请号：US12002259
申请日：2007-12-17
申请人： Chinhua Wang , Jose A. Garcia
发明人： Chinhua Wang , Jose A. Garcia
IPC分类号： G01N3/40
CPC分类号： G01N3/54 , G01N2203/0682
摘要： There is provided a method and apparatus to monitor hardness using laser infrared photothermal radiometry. The emphasis is on the ability of this invention to monitor in a non-contact and non-destructive manner the hardness case depth of industrially heat treated steels. The present invention provides a method and apparatus comprising signal generation and analysis as well as instrumental hardware configurations based on the physical principle of photothermal radiometry. The method comprises (a) irradiating the sample surface with an excitation source of suitable emission wavelength and intensity. (b) producing periodic frequency pulses of the laser beam by means of a modulator in the appropriate frequency range (but not confined to) 0.1-100000 Hz. (c) passing the emitted beam through appropriate optics for beam conditioning (d) splitting the incident beam in two beams using a beam-splitter (e) focusing one of the beams onto a photodiode connected to a lock-in amplifier referenced to the modulator frequency to monitor laser power fluctuations (f) directing the second beam normal or at an angle to the surface of the sample (g) directing the generated infrared emissions from the sample surface to an infrared detector connected to another lock-in amplifier also referenced to the modulator frequency (h) recording the signals obtained from both lock-in amplifiers by a computer (i) processing the obtained signals through proprietary software and pre-calibration curves.
摘要翻译：提供了使用激光红外光热辐射测量来监测硬度的方法和装置。重点在于本发明以非接触和非破坏性方式监测工业热处理钢的硬度情况深度的能力。本发明提供一种包括信号产生和分析以及基于光热辐射测量的物理原理的仪器硬件配置的方法和装置。该方法包括（a）用合适的发射波长和强度的激发源照射样品表面。（b）通过在适合的频率范围（但不限于）0.1-100000Hz的调制器产生激光束的周期性频率脉冲。（c）将发射的光束通过适当的光学器件用于光束调节（d）使用分束器（e）将入射光束分成两束，所述光束分离器（e）将光束中的一个束聚焦到连接到参考调制器的锁定放大器的光电二极管监测激光功率波动的频率（f）将第二光束正常或与样品表面成一角度（g），将产生的红外发射从样品表面引导到连接到另一个锁定放大器的红外检测器，该另一个锁定放大器也参考通过计算机记录从两个锁定放大器获得的信号的调制器频率（h）（i）通过专有软件和预校准曲线处理获得的信号。

2. 发明授权

US07712955B2 Non-contact method and apparatus for hardness case depth monitoring 失效
标题翻译：用于硬度情况深度监测的非接触式方法和装置
公开(公告)号：US07712955B2
公开(公告)日：2010-05-11
申请号：US12002259
申请日：2007-12-17
申请人： Chinhua Wang , Jose A. Garcia
发明人： Chinhua Wang , Jose A. Garcia
IPC分类号： G01N25/00 , G01N17/00 , G01J5/00
CPC分类号： G01N3/54 , G01N2203/0682
摘要： There is provided a method and apparatus to monitor hardness using laser infrared photothermal radiometry. The emphasis is on the ability of this invention to monitor in a non-contact and non-destructive manner the hardness case depth of industrially heat treated steels. The present invention provides a method and apparatus comprising signal generation and analysis as well as instrumental hardware configurations based on the physical principle of photothermal radiometry. The method comprises (a) irradiating the sample surface with an excitation source of suitable emission wavelength and intensity. (b) producing periodic frequency pulses of the laser beam by means of a modulator in the appropriate frequency range (but not confined to) 0.1-100000 Hz. (c) passing the emitted beam through appropriate optics for beam conditioning (d) splitting the incident beam in two beams using a beam-splitter (e) focusing one of the beams onto a photodiode connected to a lock-in amplifier referenced to the modulator frequency to monitor laser power fluctuations (f) directing the second beam normal or at an angle to the surface of the sample (g) directing the generated infrared emissions from the sample surface to an infrared detector connected to another lock-in amplifier also referenced to the modulator frequency (h) recording the signals obtained from both lock-in amplifiers by a computer (i) processing the obtained signals through proprietary software and pre-calibration curves.
摘要翻译：提供了使用激光红外光热辐射测量来监测硬度的方法和装置。重点在于本发明以非接触和非破坏性方式监测工业热处理钢的硬度情况深度的能力。本发明提供一种包括信号产生和分析以及基于光热辐射测量的物理原理的仪器硬件配置的方法和装置。该方法包括（a）用合适的发射波长和强度的激发源照射样品表面。（b）通过在适合的频率范围（但不限于）0.1-100000Hz的调制器产生激光束的周期性频率脉冲。（c）将发射的光束通过适当的光学器件用于光束调节（d）使用分束器（e）将入射光束分成两束，所述光束分离器（e）将光束中的一个束聚焦到连接到参考调制器的锁定放大器的光电二极管监测激光功率波动的频率（f）将第二光束正常或与样品表面成一角度（g），将产生的红外发射从样品表面引导到连接到另一个锁定放大器的红外检测器，该另一个锁定放大器也参考通过计算机记录从两个锁定放大器获得的信号的调制器频率（h）（i）通过专有软件和预校准曲线处理获得的信号。

3. 发明授权

US07116421B2 Device and method for differential sensing of hydrogen gas using thermoabsorptance or thermoreflectance 失效
标题翻译：使用热吸收或热敏电阻差分感应氢气的装置和方法
公开(公告)号：US07116421B2
公开(公告)日：2006-10-03
申请号：US10384598
申请日：2003-03-11
申请人： Jose Agustin Garcia , Andreas Mandelis , Chinhua Wang
发明人： Jose Agustin Garcia , Andreas Mandelis , Chinhua Wang
IPC分类号： G01N21/00
CPC分类号： G01N21/783 , G01N21/171 , G01N33/005
摘要： A hydrogen sensor, useful for trace hydrogen gas detection. The sensor involves providing a gas sample, generating modulated optical excitation sources, bringing the optical excitation source to the side of a metalized thin pyroelectric film, and detecting via a lock-in amplifier circuit the coherent differential signal resulting from thermoreflectance and thermoabsorptance changes in the film when exposed to hydrogen gas.
摘要翻译：氢传感器，用于痕量氢气检测。该传感器包括提供气体样品，产生调制的光学激发源，将光学激发源带到金属化的薄热电薄膜的侧面，以及通过锁定放大器电路检测由于热反射和热吸收变化引起的相干差分信号当暴露于氢气时胶片。

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