Angle of attack indicator using a radioactive source and delector
阅读：978发布：2023-04-08
专利汇可以提供Angle of attack indicator using a radioactive source and delector专利检索，专利查询，专利分析的服务。并且In order to provide an instantaneous indication of the angle of attack of a body traveling through the air at supersonic speeds, opposite surfaces of the leading edge of the body are provided with nucleonic radiation sources so directed as to intercept the shockwave created by the body with nucleonic radiation, some of which is reflected to radiation detectors also mounted on the body opposite surfaces. The outputs of the detectors are fed to a ratio compute and from there to a visual display device.，下面是Angle of attack indicator using a radioactive source and delector专利的具体信息内容。
1. An angle of attack indicator for a craft of the type that is constructed and arranged to pass through the air at supersonic velocity, setting-up a shockwave thereabout comprising: first nucleonic radiation sensor and source means mountable on the craft at a first location thereon and constructed and arranged to provide an output signal proportional to the proximity of a first point on the shockwave to the sensor means; second nucleonic radiation sensor and source means mountable on the craft at a second location thereon and constructed and arranged to provide an output signal proportional to the proximity of a second point on the shockwave to the second sensor means; and means for transmitting the output signals of the first and second sensor means to a ratio computer for providing an indication of the angle of attack of said craft.
2. The indicator of claim 1 further comprising a ratio computer located on board said craft; and wherein said transmitting means comprises a cable connecting said ratio computer to said first and second sensor means.
3. The indicator of claim 2 further comprising a visual display device on board said craft, said visual display device being operatively connected to said ratio computer and being constructed and arranged to receive the output thereof and provide a changeable visual display proportional thereto.
4. The indicator of claim 1 wherein each sensor and source means includes a radiation source constructed and arranged to emit nucleonic radiations toward a preselected region on the shockwave, and a detector constructed and arranged to receive radiations emitted from the respective radiation source then back scattered or reflected from said shockwave.
5. The indicator of claim 4 wherein each sensor and source means further includes a housing of radiation shielding material and having means defining a first collimating recess therein in which the respective radiation source is received and a second collimating recess therein in which the respective detector is received.
6. The indicator of claim 5 whereiN the first and second recesses of each sensor and source means are angled with respect to one another so as to have a longitudinal axis intersection spaced outwardly from the craft.
7. The indicator of claim 4 wherein the first sensor and source means is mounted in the upper side of a foil member of the craft near the leading edge of the foil member and adapted to sense proximity to a segment of the shockwave that passes over the foil; and wherein the second sensor and source means is mounted in the lower side of the foil member of the craft near the leading edge of the foil member and adapted to sense proximity to a segment of the shockwave that passes under the foil.
8. An angle of attack indicator for a craft of the type that is constructed and arranged to pass through the air at supersonic velocity, setting up a shockwave thereabout, comprising: at least one sensor mounted on the craft proximate the shockwave, including a nucleonic radiation source emitting radiation encountering the shockwave, and a detector so directed toward the shockwave as to receive nucleonic radiation emitted by the nucleonic radiation source then reflected or backscattered by the shockwave, said detector including output means providing a signal proportional to said nucleonic radiation received by said detector.
9. The angle of attack indicator of claim 8, further including a visual display device calibrated in angle of attack units; and comparison means connected to said detector output means and providing input to said visual display device, said comparison means being constructed and arranged to convert said detector output means signal to an input signal for providing angle of attack visual indications on said visual display device.
10. A method for indicating the angle of attack of a craft of the type that is constructed and arranged to pass through the air at supersonic velocity, setting up a shockwave about the craft, comprising: emitting nucleonic radiation from the craft toward a selected region on the shockwave, detecting from the craft nucleonic radiation reflected or backscattered from the selected region and providing a signal proportional to the detected nucleonic radiation.
11. The method of claim 10 further including contemporaneously: emitting nucleonic radiation from the craft toward a second selected region on the shockwave, detecting from the craft nucleonic radiation reflected or backscattered from the second selected region and providing a signal proportional to the detected nucleonic radiation.
12. The method of claim 11 further including comparing the two signals with one another to provide a ratio thereof proportional to the angle of attack of the craft.
13. The method of claim 11 further including: providing an analogue of the position of the shockwave with respect to the craft at various angles of attack and comparing at least one of the signals to the analogue to provide an indication proportional to the angle of attack of the craft.
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