为保证对船舶动力舱极早期火灾探测的及时性、准确性和可靠性,需要对烟雾浓度检测原理进行改进和烟雾浓度算法的创新。基于电容式检测元胞结构对烟雾浓度检测原理进行全新设计,并采用多尺度烟雾粒子浓度检测算法对检测信号进行处理,以...为保证对船舶动力舱极早期火灾探测的及时性、准确性和可靠性,需要对烟雾浓度检测原理进行改进和烟雾浓度算法的创新。基于电容式检测元胞结构对烟雾浓度检测原理进行全新设计,并采用多尺度烟雾粒子浓度检测算法对检测信号进行处理,以计算出烟雾粒子浓度。试验结果表明:新设计的探测器可实现对0~10%obs/m浓度烟雾粒子的有效检测,检测精度高于百万分比浓度(Parts Per Million,PPM)级;探测器的灵敏度可以达到PPM级;在存在一定浓度的油气和不同粒径灰尘的使用环境中,仍能实现高于PPM级精度的烟雾粒子浓度检测。展开更多
To subtract the slit function from the measured spectrum, a wavelet-based deconvolution method is proposed to obtain a regularized solution of the problem. The method includes reconstructing the signal from the wavele...To subtract the slit function from the measured spectrum, a wavelet-based deconvolution method is proposed to obtain a regularized solution of the problem. The method includes reconstructing the signal from the wavelet modulus maxima. For the purpose of maxima selection, the spatially selective noise filtration technique was used to distinguish modulus maxima produced by signal from the one created by noise. To test the method, sodium spectrum measured at a wide slit was deconvolved. He-Ne spectrum measured at the corresponding slit width was used as slit function. Sodium measured at a narrow slit was used as the reference spectrum. The deconvolutton result shows that this method can enhance the resolution of the degraded spectrum greatly.展开更多
文摘为保证对船舶动力舱极早期火灾探测的及时性、准确性和可靠性,需要对烟雾浓度检测原理进行改进和烟雾浓度算法的创新。基于电容式检测元胞结构对烟雾浓度检测原理进行全新设计,并采用多尺度烟雾粒子浓度检测算法对检测信号进行处理,以计算出烟雾粒子浓度。试验结果表明:新设计的探测器可实现对0~10%obs/m浓度烟雾粒子的有效检测,检测精度高于百万分比浓度(Parts Per Million,PPM)级;探测器的灵敏度可以达到PPM级;在存在一定浓度的油气和不同粒径灰尘的使用环境中,仍能实现高于PPM级精度的烟雾粒子浓度检测。
文摘To subtract the slit function from the measured spectrum, a wavelet-based deconvolution method is proposed to obtain a regularized solution of the problem. The method includes reconstructing the signal from the wavelet modulus maxima. For the purpose of maxima selection, the spatially selective noise filtration technique was used to distinguish modulus maxima produced by signal from the one created by noise. To test the method, sodium spectrum measured at a wide slit was deconvolved. He-Ne spectrum measured at the corresponding slit width was used as slit function. Sodium measured at a narrow slit was used as the reference spectrum. The deconvolutton result shows that this method can enhance the resolution of the degraded spectrum greatly.
