公开(公告)号：US06339885B1

公开(公告)日：2002-01-22

申请号：US09476865

申请日：2000-01-03

申请人： W. Daniel Hillis

发明人： W. Daniel Hillis

IPC分类号： G01C1734

CPC分类号： G01C21/02

摘要： In the astrolabe herein, both the rete and the plate rotate, although around different centers. The stars are drawn onto the plate, and the coordinate system is represented by the rete. In contrast to the conventional astrolabe, where the stars and the coordinate system are projected onto a plane parallel with the earth's equator, the improved astrolabe projects stars and the coordinate system using a stereographic projection onto a plane parallel with the plane of the ecliptic. This projection puts the celestial pole at the center of the rete, and the line orthogonal to the ecliptic is projected onto the center of the plate, which points about 23.5 degrees off the earth's axis. As with a conventional astrolabe, the rete is rotated to represent the sidereal motion of the stars. In contrast to the conventional astrolabe, the plate may also be rotated to represent the precession of the earth's axis. Thus, by the combined rotations of the rete and plate the correct position of the stars for any time may be indicated. Although the embodiment described here places the stars on the plate and the coordinate system on the rete, it will be apparent to anyone skilled in the art of astrolabes that the arrangement can easily be reversed, putting stars on the rete and the coordinate system on the plate.

摘要翻译： 在这里的星座中，rete和plate都旋转，尽管围绕着不同的中心。 星星被绘制在板上，坐标系由雷帝表示。 与传统的星座相比，星星和坐标系投影到与地球赤道平行的平面上，改进的星运星将恒星和坐标系投射到与黄道平面平行的平面上。 这个投影将天极放在雷区的中心，与黄道正交的线投射到板的中心，这个距离地球轴线约23.5度。 与常规星盘一样，雷帝被旋转以代表恒星的恒星运动。 与常规星盘相反，板也可以旋转以表示地球轴线的进动。 因此，通过rete和plate的组合旋转，可以指示恒星的任何时间的正确位置。 虽然这里描述的实施例将恒星放置在板上的坐标系和坐标系上，但是对于星座的技术人员来说，这种布置可以容易地颠倒，将星星放置在坐标系上 盘子。

公开(公告)号：US06490801B1

公开(公告)日：2002-12-10

申请号：US09714797

申请日：2000-11-17

申请人： Charles H. Hersom ,  Philip Duggan ,  William A. Gault

发明人： Charles H. Hersom ,  Philip Duggan ,  William A. Gault

IPC分类号： G01C1734

CPC分类号： G05D1/0883 ,  B64G1/36 ,  B64G1/361 ,  B64G1/363 ,  B64G1/365 ,  G01S3/781 ,  G01S3/7862 ,  Y10S33/03

摘要： Sun sensors or position sensors may be used to determine the angular location of the sun or other object with respect to the sensor. The sun sensor provides high resolution over a wide field of regard. A position or sun sensor comprises a sensor housing, a plurality of pinholes formed In the sensor housing, a detector mounted within the housing and a method of processing the information detected. The detector is mounted in the sensor housing. Each pinhole has a field of view and the detector receives the images from each field of view. Each field of view is defined by the position of the pinhole relative to the detector. The images are received in an overlay relationship thereby providing a field of regard. The processing method determines the presence and location of an object In a field of regard.

摘要翻译： 可以使用太阳传感器或位置传感器来确定太阳或其它物体相对于传感器的角度位置。 太阳传感器在广泛的领域提供高分辨率。 位置或太阳传感器包括传感器壳体，在传感器壳体中形成的多个针孔，安装在壳体内的检测器和处理检测到的信息的方法。 检测器安装在传感器外壳中。 每个针孔都具有视场，检测器从每个视野接收图像。 每个视野由针孔相对于检测器的位置定义。 以覆盖关系接收图像，从而提供了一个关注的领域。 处理方法确定对象的存在和位置在一个方面。

公开(公告)号：US06449854B1

公开(公告)日：2002-09-17

申请号：US09705983

申请日：2000-11-03

申请人： Kwok Pun Cheung

发明人： Kwok Pun Cheung

IPC分类号： G01C1734

CPC分类号： G09B25/04

摘要： An apparatus for estimating a shadow on a scaled figure is presented herein. The apparatus includes a circular disk with a lines corresponding to the declination angle of the earth with respect to the sun at particular dates of the year. The apparatus also includes arcs on the circular disk which correspond to the earth's rotation at particular times of the day. The circular disk can also have a slot to facilitate insertion of a pencil or pen time therein. The circular disk is substantially transparent to enable a user to lay the disk over a scaled figure and make calculations and measurements corresponding to a shadow to be estimated. Also disclosed is a method for estimating a shadow for a structure depicted in a scaled figure. The circular disk is placed over the scaled figure such that the slot in the disk is aligned with an azimuth of the sun so as to trace a shadow line. The circular disk is then reoriented perpendicular to the shadow line so that a scaled height line may be traced. The circular disk is then relocated so that the center of the slot is located at the end of the scaled height line. The circular disk is then rotated to an angle corresponding to the height of the sun and a projection line is traced in the slot from the end of the scaled height line to the shadow line. In this manner, the length of the shadow for a given azimuth and altitude can be determined.

摘要翻译： 本文给出了一种用于估计缩放图上的阴影的装置。 该装置包括圆形盘，其具有对应于地球相对于一年中特定日期的太阳的倾角的线。 该装置还包括圆盘上的圆弧，其对应于当天特定时间的地球旋转。 圆盘还可以具有槽以便于在其中插入铅笔或笔的时间。 圆盘基本上是透明的，以使用户能够将光盘放置在比例尺上的图形上，并进行与要估计的阴影对应的计算和测量。 还公开了一种用于估计缩放图中描绘的结构的阴影的方法。 将圆盘放置在缩放图上，使得盘中的槽与太阳的方位对准，以便跟踪阴影线。 然后圆形盘垂直于阴影线重新定向，从而可以跟踪缩放的高度线。 然后将圆盘重新定位，使得槽的中心位于缩放高度线的末端。 然后将圆盘旋转到与太阳的高度相对应的角度，并且将投影线从缩放的高度线的末端到阴影线在狭缝中追踪。 以这种方式，可以确定给定方位角和高度的阴影长度。