公开(公告)号：US20220388623A1

公开(公告)日：2022-12-08

申请号：US17530394

申请日：2021-11-18

Applicant: Huan-Chang Liu

Inventor： Huan-Chang Liu

IPC: B64B1/58 ,  B64B1/22 ,  B64B1/30

Abstract: An airship includes a gasbag, a cockpit and a first shaft body, where the gasbag is filled with a gas for lifting the airship; the gasbag and the cockpit are sequentially arranged along an axial direction of the first shaft body and fixed to the first shaft body, and there is a spacing between the gasbag and the cockpit; at least one of the gasbag and the cockpit is rotatably connected to the first shaft body; after the gasbag is filled with the gas for lifting the airship, any section of the gasbag in a direction perpendicular to the axial direction of the first shaft body is circular or annular; and the axial direction of the first shaft body is the same as a direction of gravity.

公开(公告)号：US06870429B2

公开(公告)日：2005-03-22

申请号：US10603362

申请日：2003-06-25

Applicant: Robert A. Hawley ,  Robindra B. Joshi ,  Huan-Chang Liu

Inventor： Robert A. Hawley ,  Robindra B. Joshi ,  Huan-Chang Liu

IPC: H04L27/36 ,  H03L7/00

CPC classification number: H04L27/362

Abstract: Clock signals and digital data signals at a variable frequency are introduced to the input of a FIFO and are passed from the FIFO at a second (or intermediate) frequency controlled by a numerically controlled oscillator. To regulate the frequency of the signals from the numerically controlled oscillator, the phases of the clock signals at the variable frequency are compared in a phase detector with the phases of the signals from the numerically controlled oscillator to generate an error signal. The error signals and the signals at a fixed sampling frequency higher than the intermediate frequency regulate the frequency of the signals from the numerically controlled oscillator and thus the frequency of the digital data signals from the FIFO. The digital data signals from the FIFO are converted to a pair of signals at the second frequency. The pair of signals at the second frequency have individual ones of a plurality of analog levels dependent upon a code indicated by successive pairs of the digital data signals. The signals at the second (or intermediate) frequency modulate a pair of trigonometrically related signals at the fixed sampling frequency. The modulated signals at the fixed sampling frequency are combined and the combined signals are sampled at the fixed sampling frequency to corresponding analog values by a digital-to-analog converter.

Abstract translation: 可变频率的时钟信号和数字数据信号被引入到FIFO的输入端，并且以由数控振荡器控制的第二（或中间）频率从FIFO传送。 为了调节来自数控振荡器的信号的频率，将可变频率的时钟信号的相位在相位检测器中与来自数控振荡器的信号的相位进行比较，以产生误差信号。 误差信号和高于中频的固定采样频率的信号调节来自数控振荡器的信号的频率，从而调节来自FIFO的数字数据信号的频率。 来自FIFO的数字数据信号被转换成第二频率的一对信号。 在第二频率处的这对信号具有多个模拟电平中的单独的信号，这取决于连续的数字数据信号对所指示的代码。 第二（或中间）频率处的信号以固定采样频率调制一对三角相关信号。 将固定采样频率的调制信号合并，并将组合信号以固定采样频率采样到数模转换器对应的模拟值。

公开(公告)号：US06421396B1

公开(公告)日：2002-07-16

申请号：US08843518

申请日：1997-04-16

Applicant: Robert A. Hawley ,  Robindra B. Joshi ,  Huan-Chang Liu

Inventor： Robert A. Hawley ,  Robindra B. Joshi ,  Huan-Chang Liu

IPC: H04L2720

CPC classification number: H04L27/362

Abstract: Clock signals and digital data signals at a variable frequency are introduced to the input of a FIFO and are passed from the FIFO at a second (or intermediate) frequency controlled by a numerically controlled oscillator. To regulate the frequency of the signals from the numerically controlled oscillator, the phases of the clock signals at the variable frequency are compared in a phase detector with the phases of the signals from the numerically controlled oscillator to generate an error signal. The error signals and the signals at a fixed sampling frequency higher than the intermediate frequency regulate the frequency of the signals from the numerically controlled oscillator and thus the frequency of the digital data signals from the FIFO. The digital data signals from the FIFO are converted to a pair of signals at the second frequency. The pair of signals at the second frequency have individual ones of a plurality of analog levels dependent upon a code indicated by successive pairs of the digital data signals. The signals at the second (or intermediate) frequency modulate a pair of trigonometrically related signals at the fixed sampling frequency. The modulated signals at the fixed sampling frequency are combined and the combined signals are sampled at the fixed sampling frequency to corresponding analog values by a digital-to-analog converter.

公开(公告)号：US11702184B2

公开(公告)日：2023-07-18

申请号：US17530394

申请日：2021-11-18

Applicant: Huan-Chang Liu

Inventor： Huan-Chang Liu

IPC: B64B1/58 ,  B64B1/30 ,  B64B1/22 ,  B64B1/66

CPC classification number: B64B1/58 ,  B64B1/22 ,  B64B1/30

Abstract: An airship includes a gasbag, a cockpit and a first shaft body, where the gasbag is filled with a gas for lifting the airship; the gasbag and the cockpit are sequentially arranged along an axial direction of the first shaft body and fixed to the first shaft body, and there is a spacing between the gasbag and the cockpit; at least one of the gasbag and the cockpit is rotatably connected to the first shaft body; after the gasbag is filled with the gas for lifting the airship, any section of the gasbag in a direction perpendicular to the axial direction of the first shaft body is circular or annular; and the axial direction of the first shaft body is the same as a direction of gravity.

公开(公告)号：US06611568B2

公开(公告)日：2003-08-26

申请号：US10116975

申请日：2002-04-05

Applicant: Robert A. Hawley ,  Robindra B. Joshi ,  Huan-Chang Liu

Inventor： Robert A. Hawley ,  Robindra B. Joshi ,  Huan-Chang Liu

IPC: H04L2720

CPC classification number: H04L27/362

Abstract: Clock signals and digital data signals at a variable frequency are introduced to the input of a FIFO and are passed from the FIFO at a second (or intermediate) frequency controlled by a numerically controlled oscillator. To regulate the frequency of the signals from the numerically controlled oscillator, the phases of the clock signals at the variable frequency are compared in a phase detector with the phases of the signals from the numerically controlled oscillator to generate an error signal. The error signals and the signals at a fixed sampling frequency higher than the intermediate frequency regulate the frequency of the signals from the numerically controlled oscillator and thus the frequency of the digital data signals from the FIFO. The digital data signals from the FIFO are converted to a pair of signals at the second frequency. The pair of signals at the second frequency have individual ones of a plurality of analog levels dependent upon a code indicated by successive pairs of the digital data signals. The signals at the second (or intermediate) frequency modulate a pair of trigonometrically related signals at the fixed sampling frequency. The modulated signals at the fixed sampling frequency are combined and the combined signals are sampled at the fixed sampling frequency to corresponding analog values by a digital-to-analog converter.