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发明公开
CN109959637A 用于玻璃药瓶残氧量检测的标准具效应抑制方法及装置 有权 转让

用于玻璃药瓶残氧量检测的标准具效应抑制方法及装置
摘要：
本发明公开了一种用于玻璃药瓶残氧量检测的标准具效应抑制方法及装置，该方法通过获取激光穿透玻璃药瓶后的主透射光强和反射两次后的透射光强，并转换成第一电流信号，获取激光穿透玻璃药瓶时的反射一次后的透射光强和反射三次后的透射光强，并转换成第二电流信号，根据第一电流信号和第二电流信号，获得输出电流，提取输出电流的二次谐波电流信号以及根据二次谐波电流信号获得氧气浓度，解决了现有技术由于玻璃药瓶瓶壁产生的光束干涉给二次谐波带来的光学噪声，导致残氧量检测精度低的技术问题，通过从信号检测部分消除二次谐波中的噪声，能从根源上抑制标准具效应，大大提高了氧气浓度检测精度和系统的稳定度。
摘要（英）：

The invention discloses an etalon effect suppression method and device for detecting residual oxygen in a glass vial. The method comprises the steps that the main transmitted light intensity of laserwhich penetrates the glass vial and the transmitted light intensity after twice reflection are acquired and converted into a first current signal; the transmitted light intensity after the reflectionof the laser through the glass vial and the transmitted light intensity after three times of reflection are acquired and converted into a second current signal; according to the first current signal and the second current signal, output current is acquired; the second harmonic current signal of the output current is extracted; and the oxygen concentration is acquired according to the second harmonic current signal. The technical problem of low detection accuracy of residual oxygen due to optical noise caused by the interference of a beam generated by the wall of the glass vial to the second harmonic in the prior art is solved. By eliminating noise in the second harmonic from the signal detection part, the etalon effect can be suppressed from the source. The oxygen concentration detection accuracy and system stability are greatly improved.

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