Mapping systems
First Claim
1. A method of operating an apparatus, for surveying a region, the apparatus including transmitter means capable of transmitting energy along a plurality of paths lying radially in a sector of a circle and receiver means capable of being focussed on positions in said region to receive energy reflected therein, the method being suitable to provide echo data, for individual ones of a plurality of positions in said region, suitable for display on a raster of scanned lines in a display apparatus, and including the steps of defining a plurality of said positions disposed on a cartesian matrix notionally defined in said region such that lines of said positions correspond to said scanned lines of said display arrangement;
- directing the transmitted energy into the region along a plurality of said radial paths such that each path is of sufficient width to intercept a plurality of said positions;
focussing the receiver means in sequence on each of the plurality of positions intercepted by one of said paths to receive energy reflected therein; and
repeating the preceding step for the other said paths.
1 Assignment
0 Petitions
Accused Products
Abstract
For ultrasonic or other mapping systems which use PPI scan, it is desirable to convert the data to a raster scan format for, say, T.V. display. This may be achieved by conversion in a frame store. It is here proposed to time the PPI scan so that points interrogated by the effective receiving beam lie also on line of a cartesian matrix in the mapped region which correspond to the raster lines of the display thus the conversion is directly achieved.
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Citations
11 Claims
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1. A method of operating an apparatus, for surveying a region, the apparatus including transmitter means capable of transmitting energy along a plurality of paths lying radially in a sector of a circle and receiver means capable of being focussed on positions in said region to receive energy reflected therein, the method being suitable to provide echo data, for individual ones of a plurality of positions in said region, suitable for display on a raster of scanned lines in a display apparatus, and including the steps of defining a plurality of said positions disposed on a cartesian matrix notionally defined in said region such that lines of said positions correspond to said scanned lines of said display arrangement;
- directing the transmitted energy into the region along a plurality of said radial paths such that each path is of sufficient width to intercept a plurality of said positions;
focussing the receiver means in sequence on each of the plurality of positions intercepted by one of said paths to receive energy reflected therein; and
repeating the preceding step for the other said paths. - View Dependent Claims (2, 3, 4, 5)
- directing the transmitted energy into the region along a plurality of said radial paths such that each path is of sufficient width to intercept a plurality of said positions;
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6. A method of operating an ultrasonic apparatus having a phased array of ultrasonic transducers to provide an effective raster scan, the method including the steps of:
- defining a plurality of positions disposed on a cartesian matrix in a region to be examined;
directing transmitted ultrasonic energy into the region along a plurality of radial paths such that each path is of sufficient width to intercept a plurality of said positions;
focussing the ultrasonic transducers operated as a receiver in sequence on each of the plurality of positions intercepted by one of said paths to receive energy reflected therein; and
repeating the preceding step for the other said paths.
- defining a plurality of positions disposed on a cartesian matrix in a region to be examined;
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7. A method of operating an apparatus, for surveying a region, comprising a phased array of energy transmitting and receiving devices, the method including the steps of:
- defining a plurality of positions disposed on a cartesian matrix in the region;
directing the transmitted energy into the region along a plurality of radial paths such that each path is of sufficient width to intercept a plurality of said positions;
focussing the devices, operated as receiving devices, in sequence on each of the plurality of positions intercepted by one of said paths to receive energy reflected therein; and
repeating the preceding step for the other said paths.
- defining a plurality of positions disposed on a cartesian matrix in the region;
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8. An apparatus for examining a region, the apparatus including:
- transmitter means for transmitting energy along paths lying radially in a sector of a circle;
receiver means for receiving energy reflected at positions, in said region, intercepted by the path on which the energy was transmitted;
means for causing the transmitter means to transmit the energy into the region along a plurality of radial paths each of which is sufficient width to intercept several of a plurality of said positions which are disposed on a cartesian matrix notionally defined in said region;
means for focussing the receiver means in sequence on positions, disposed on said matrix, intercepted by the path on which the energy was transmitted, to provide signals each of which represents the energy reflected at an individual one of said positions; and
a display arrangement adapted to display the received signals on a raster of scanned lines representing lines of said cartesian matrix. - View Dependent Claims (9, 10, 11)
- transmitter means for transmitting energy along paths lying radially in a sector of a circle;
Specification