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公开(公告)号：US5313325A
公开(公告)日：1994-05-17
申请号：US74910
申请日：1993-06-10
摘要： A light emitting article comprises a composite of carbon-bonded carbon fibers, prepared by: blending carbon fibers with a carbonizable organic powder to form a mixture; dispersing the mixture into an aqueous slurry; vacuum molding the aqueous slurry to form a green article; drying and curing the green article to form a cured article; and, carbonizing the cured article at a temperature of at least about 1000.degree. C. to form a carbon-bonded carbon fiber light emitting composite article having a bulk density less than 1 g/cm.sup.3.
摘要翻译： 发光制品包括通过以下方式制备的碳键合碳纤维的复合物：将碳纤维与可碳化有机粉末混合以形成混合物; 将混合物分散在含水浆液中; 真空成型含水浆料以形成绿色制品; 干燥并固化绿色制品以形成固化制品; 并且在至少约1000℃的温度下对固化物进行碳化，以形成堆积密度小于1g / cm3的碳键碳碳纤维发光复合制品。
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公开(公告)号：US5243464A
公开(公告)日：1993-09-07
申请号：US916808
申请日：1992-07-20
摘要： A light absorbing article comprised of a composite of carbon-bonded carbon fibers, prepared by: blending carbon fibers with a carbonizable organic powder to form a mixture; dispersing the mixture into an aqueous slurry; vacuum molding the aqueous slurry to form a green article; drying and curing the green article to form a cured article; and, carbonizing the cured article at a temperature of at least about 1000.degree. C. to form a carbon-bonded carbon fiber light absorbing composite article having a bulk density less than 1 g/cm.sup.3.
摘要翻译： 一种由碳粘合碳纤维复合材料组成的吸光制品，其通过以下方法制备：将碳纤维与可碳化有机粉末混合以形成混合物; 将混合物分散在含水浆液中; 真空成型含水浆料以形成绿色制品; 干燥并固化绿色制品以形成固化制品; 并且在至少约1000℃的温度下对固化物进行碳化，以形成堆积密度小于1g / cm 3的碳键碳纤维光吸收复合制品。
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公开(公告)号：US4254332A
公开(公告)日：1981-03-03
申请号：US66107
申请日：1979-08-13
CPC分类号： G01J1/4257 , H01S3/0014
摘要： A laser pulse detector is provided which is small and inexpensive and has the capability of detecting laser light of any wavelength with fast response (less than 5 nanoseconds rise time). The laser beam is focused onto the receiving end of a graphite rod coaxially mounted within a close-fitting conductive, open-end cylindrical housing so that ablation and electric field breakdown of the resulting plasma occurs due to a bias potential applied between the graphite rod and housing. The pulse produced by the breakdown is transmitted through a matched impedance coaxial cable to a recording device. The cable is connected with its central lead to the graphite rod and its outer conductor to the housing.
摘要翻译： 提供了一种小型且价格低廉的激光脉冲检测器，具有检测任何波长的激光，具有快速响应（小于5纳秒上升时间）的能力。 激光束被聚焦到同轴地安装在紧密接合的导电的开口圆柱形壳体中的石墨棒的接收端上，使得由于施加在石墨棒和石墨棒之间的偏置电位而产生的等离子体的消融和电场击穿 住房。 由击穿产生的脉冲通过匹配的阻抗同轴电缆传输到记录装置。 电缆与其中心导线连接到石墨棒，其外部导体连接到外壳。
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公开(公告)号：US5539705A
公开(公告)日：1996-07-23
申请号：US329889
申请日：1994-10-27
IPC分类号： H04B11/00
CPC分类号： H04B11/00
摘要： A wireless communication system undetectable by radio frequency methods for converting audio signals, including human voice, to electronic signals in the ultrasonic frequency range, transmitting the ultrasonic signal by way of acoustical pressure waves across a carrier medium, including gases, liquids, or solids, and reconverting the ultrasonic acoustical pressure waves back to the original audio signal. The ultrasonic speech translator and communication system (20) includes an ultrasonic transmitting device (100) and an ultrasonic receiving device (200). The ultrasonic transmitting device (100) accepts as input (115) an audio signal such as human voice input from a microphone (114) or tape deck. The ultrasonic transmitting device (100) frequency modulates an ultrasonic carrier signal with the audio signal producing a frequency modulated ultrasonic carrier signal, which is transmitted via acoustical pressure waves across a carrier medium such as gases, liquids or solids. The ultrasonic receiving device (200) converts the frequency modulated ultrasonic acoustical pressure waves to a frequency modulated electronic signal, demodulates the audio signal from the ultrasonic carrier signal, and conditions the demodulated audio signal to reproduce the original audio signal at its output (250).
摘要翻译： 通过用于将包括人声在内的音频信号转换为超声波频率范围内的电子信号的无线电频率方法不可检测的无线通信系统，通过声压波穿过载体介质（包括气体，液体或固体）传输超声波信号， 并将超声波声压波重新转换回原始音频信号。 超声波语音翻译器和通信系统（20）包括超声波发送装置（100）和超声波接收装置（200）。 超声波发送装置（100）接收来自麦克风（114）或磁带卡座的诸如人声的音频信号作为输入（115）。 超声波发送装置（100）利用音频信号对超声波载波信号进行频率调制，产生频率调制的超声载波信号，该频率调制的超声波载波信号通过声压波穿过诸如气体，液体或固体的载体介质。 超声波接收装置（200）将频率调制的超声波声压转换成频率调制的电子信号，对来自超声波载波信号的音频信号进行解调，并调制解调的音频信号，以在其输出（250）再现原始音频信号， 。
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