公开(公告)号：US5317524A

公开(公告)日：1994-05-31

申请号：US762837

申请日：1991-09-19

Applicant: Promit Das ,  Terrance R. Kinney

Inventor： Promit Das ,  Terrance R. Kinney

IPC: G01D5/353 ,  G01D5/26 ,  G01J3/45 ,  G01K1/02 ,  G01K11/00 ,  G01K11/12 ,  G01N21/23 ,  G01K7/02

CPC classification number: G01D5/268 ,  G01K11/00

Abstract: A process for analyzing a spectral signal generated by a birefringent element and transmitted to an array. An output spectral signal emanating from the array is converted from an analog to a digital signal to establish a reference wave form which has a dominant frequency after the birefringent element is exposed to a known temperature. Thereafter, a current wave form is generated from the output spectral signal emanating from the array. A phase and frequency relationship is obtained by cross correlating the current wave form and the reference wave form. The dominant frequency for the phase and frequency relationship is obtained by Fast Fourier Transformation. Thereafter, the dominant frequency for the phase and frequency relationship of the current wave form is compared with the dominant frequency for the reference wave form to determine a temperature range. The temperature range and phase and dominant frequency for the current wave form are matched with a reference schedule stored in the memory of a digital signal processor to predict the current temperature experienced by the birefringent element. This predicted temperature is displayed on a screen to inform an operator of the current operational conditions experienced by the birefringent element.

Abstract translation: 用于分析由双折射元件产生并传输到阵列的光谱信号的处理。 从阵列发出的输出光谱信号从模拟信号转换为数字信号，以建立在双折射元件暴露于已知温度之后具有主频的参考波形。 此后，从从阵列发出的输出光谱信号产生当前波形。 通过将当前波形与参考波形相互交叉获得相位和频率关系。 通过快速傅立叶变换获得相位和频率关系的主频率。 此后，将电流波形的相位和频率关系的主频与参考波形的主频进行比较，以确定温度范围。 当前波形的温度范围和相位和主频与存储在数字信号处理器的存储器中的参考调度相匹配，以预测双折射元件所经历的当前温度。 该预测温度显示在屏幕上以通知操作者双折射元件所经历的当前操作条件。

公开(公告)号：US5164600A

公开(公告)日：1992-11-17

申请号：US628961

申请日：1990-12-13

Applicant: Promit Das ,  Terrance R. Kinney

Inventor： Promit Das ,  Terrance R. Kinney

IPC: F23N5/08

CPC classification number: F23N5/082 ,  F23N2029/00

Abstract: A light off detecting arrangement for sensing the presence of a flame in a region such as the afterburner of a turbine engine is disclosed. An optical focusing device such as a lens or mirror is located near a quartz window adjacent the afterburner for concentrating electromagnetic radiation emanating from the region. An optical (fiber optic) pathway receives the concentrated electromagnetic radiation from the optical focusing device and conveys that radiation thru the optic filters to an opto-electrical converter for converting incident electromagnetic radiation to electrical signals. A frequency selective optical device such as an infrared filter is interposed between the optical focusing device and the opto-electrical converter for insuring that a preselected portion only of the electromagnetic radiation emanating from the region is converted to electrical signals. The electrical signals are compared to a predetermined threshold value and a fault flame present indication is issued if the comparison indicates sufficient radiation in the preselected portion indicative of the presence of a flame, and a second no flame indication is issued otherwise.

Abstract translation: 公开了一种用于感测在诸如涡轮发动机的再加燃器之类的区域中存在火焰的熄灭检测装置。 诸如透镜或反射镜之类的光学聚焦装置位于靠近加力器的石英窗附近，用于集中从该区域发出的电磁辐射。 光学（光纤）路径接收来自光学聚焦装置的集中的电磁辐射，并将通过光学滤波器的辐射传送到光电转换器，用于将入射的电磁辐射转换成电信号。 在光聚焦装置和光电转换器之间插入诸如红外滤光器的频率选择性光学装置，用于确保只有从该区域发出的电磁辐射的预选部分被转换成电信号。 将电信号与预定阈值进行比较，并且如果比较表示预先指示火焰存在的预选部分中的足够辐射，并且否则另外发出第二无火焰指示，则发出故障火焰存在指示。