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1. 发明公开

EP0969292A2 Distance measuring systems, altimeters and aircraft 审中-公开
标题翻译： Systeme zur Entfernungsmessung，Höhenmesserund Luftfahrzeuge
公开(公告)号：EP0969292A2
公开(公告)日：2000-01-05
申请号：EP99305076.4
申请日：1999-06-28
申请人： Subacoustech Limited
发明人： Nedwell, Jeremy Ross
IPC分类号： G01S15/32 , G01S15/88 , G01S7/521
CPC分类号： G01S15/104 , G01S15/06
摘要： A distance measuring system is described which may be used as an altimeter for a helicopter or for a load carried by its winch. The system comprises: a transmitting transducer (18) for converting a first modulated electrical signal into a corresponding acoustic signal to be directed towards and reflected by a surface (20); a receiving transducer (22) for converting the received reflected acoustic signal into a corresponding second electrical signal; and a correlation processor (17) for receiving the second electrical signal, or the first and second electrical signals, and correlating the modulations thereof to produce an indication of a time delay thereof from which the distance(≈2d) travelled by the acoustic signal can be determined.
The frequency of the acoustic signal is preferably chosen so that it is not at or near the fundamental resonant frequency of either transducer and so that it satisfies at least one of the following conditions: at or near a higher-order resonant frequency of one or both of the transducers; at a frequency at which a frequency-dependent directivity index of the transducers is relatively high; at a frequency at which the ambient acoustic noise level is relatively low; and at a frequency at which the acoustic reflection loss at the surface is relatively low. The transducers are preferably mounted adjacent each other, with an acoustically absorbent material (32) between them, and by respective mounting systems (42,44) to a common member (36), with each mounting system providing acoustic damping and isolation between its transducer and the common member. The correlation processor is preferably arranged so that it does not attempt to correlate the electrical signals in respect of a time delay which is less than or generally equal to the time taken for the acoustic signal to travel directly between the transducers. The first electrical signal is preferably modulated by an M-sequence. An altitude-related aspect of the helicopter may be controlled in dependence upon the indicated time delay.
摘要翻译：描述了一种距离测量系统，其可以用作直升机的高度计或其绞盘承载的负载。该系统包括：发射换能器（18），用于将第一调制电信号转换成相对应的声信号以被指向并由表面（20）反射; 接收换能器（22），用于将所接收的反射声信号转换成对应的第二电信号; 以及相关处理器（17），用于接收第二电信号或第一和第二电信号，并使其调制相关，以产生其时间延迟的指示，由声信号行进的距离（APPROX 2d）确定。声信号的频率优选地被选择为使得它不在任何一个换能器的基本共振频率处或其附近，并且使得其满足以下条件中的至少一个：在一个或两个的一个或两个的高次谐振频率处或附近的传感器; 在换能器的频率相关指向性指数相对较高的频率处; 在环境噪声水平相对较低的频率下; 并且在表面处的声反射损失相对较低的频率处。传感器优选地彼此相邻地安装，在它们之间具有吸声材料（32），并且通过相应的安装系统（42,44）安装到公共构件（36），每个安装系统在其换能器之间提供声学阻尼和隔离和普通会员。相关处理器优选地被布置成使得它不试图关于小于或大体上等于声信号直接在换能器之间行进的时间的时间延迟的电信号。第一电信号优选由M序列调制。可以根据指示的时间延迟来控制直升机的高度相关方面。

2. 发明公开

EP0969292A3 Distance measuring systems, altimeters and aircraft 审中-公开
标题翻译：用于测量距离，高度计和飞机系统
公开(公告)号：EP0969292A3
公开(公告)日：2002-01-16
申请号：EP99305076.4
申请日：1999-06-28
申请人： Subacoustech Limited
发明人： Nedwell, Jeremy Ross
IPC分类号： G01S15/32 , G01S15/88 , G01S7/521 , G01S15/08
CPC分类号： G01S15/104 , G01S15/06
摘要： A distance measuring system is described which may be used as an altimeter for a helicopter or for a load carried by its winch. The system comprises: a transmitting transducer (18) for converting a first modulated electrical signal into a corresponding acoustic signal to be directed towards and reflected by a surface (20); a receiving transducer (22) for converting the received reflected acoustic signal into a corresponding second electrical signal; and a correlation processor (17) for receiving the second electrical signal, or the first and second electrical signals, and correlating the modulations thereof to produce an indication of a time delay thereof from which the distance(≈2d) travelled by the acoustic signal can be determined. The frequency of the acoustic signal is preferably chosen so that it is not at or near the fundamental resonant frequency of either transducer and so that it satisfies at least one of the following conditions: at or near a higher-order resonant frequency of one or both of the transducers; at a frequency at which a frequency-dependent directivity index of the transducers is relatively high; at a frequency at which the ambient acoustic noise level is relatively low; and at a frequency at which the acoustic reflection loss at the surface is relatively low. The transducers are preferably mounted adjacent each other, with an acoustically absorbent material (32) between them, and by respective mounting systems (42,44) to a common member (36), with each mounting system providing acoustic damping and isolation between its transducer and the common member. The correlation processor is preferably arranged so that it does not attempt to correlate the electrical signals in respect of a time delay which is less than or generally equal to the time taken for the acoustic signal to travel directly between the transducers. The first electrical signal is preferably modulated by an M-sequence. An altitude-related aspect of the helicopter may be controlled in dependence upon the indicated time delay.

3. 发明公开

EP0891761A3 Apparatus for dislodging or loosening mucus in a person's lungs 失效
标题翻译：设备影响粘液的肺
公开(公告)号：EP0891761A3
公开(公告)日：1999-06-16
申请号：EP98305097.2
申请日：1998-06-29
申请人： Subacoustech Limited
发明人： Nedwell, Jeremy Ross
IPC分类号： A61H33/00 , A61H23/02
CPC分类号： A61H23/0236 , A61H2203/02
摘要： An apparatus for dislodging or loosening mucus in a person's lungs, for example of a sufferer of cystic fibrosis, comprises a bath (24) arranged to receive the person (28) and filled with water (30) such that the person's chest is immersed in the water. A vibrator (34) vibrates the liquid so that the vibrations are transmitted to the person's lungs. In use the vibrations are preferably at the pulmonary resonant frequency or Helmholtz resonant frequency of the person's lungs.

4. 发明公开

EP0891761A2 Apparatus for dislodging or loosening mucus in a person's lungs 失效
标题翻译： Vorrichtung zur Beeinflussung der Lunge zurSchleimlösung
公开(公告)号：EP0891761A2
公开(公告)日：1999-01-20
申请号：EP98305097.2
申请日：1998-06-29
申请人： Subacoustech Limited
发明人： Nedwell, Jeremy Ross
IPC分类号： A61H33/00 , A61H23/02
CPC分类号： A61H23/0236 , A61H2203/02
摘要： An apparatus for dislodging or loosening mucus in a person's lungs, for example of a sufferer of cystic fibrosis, comprises a bath (24) arranged to receive the person (28) and filled with water (30) such that the person's chest is immersed in the water. A vibrator (34) vibrates the liquid so that the vibrations are transmitted to the person's lungs. In use the vibrations are preferably at the pulmonary resonant frequency or Helmholtz resonant frequency of the person's lungs.
摘要翻译：用于移除或松开人的肺部的粘液的装置，例如患有囊性纤维化的患者，包括设置成接纳人（28）并充满水（30）的浴（24），使得人的胸部浸入水。振动器（34）振动液体，使振动传递到人的肺部。在使用中，振动优选地处于人的肺的肺共振频率或亥姆霍兹共振频率。

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