Portable radio signal detecting system
First Claim
1. A radio signal detecting system comprising:
- a rotatable antenna mounted on a device body and which is rotatable relative to the device body;
rotation signal generating means for outputting a rotation signal every time when said rotatable antenna is rotated by a preselected rotation angle;
distance measuring means for transmitting a radio signal every time the antenna is rotated by the preselected rotation angle, and for receiving the radio signal reflected from a target to obtain distance data representing a distance between the target and said radio signal detecting system;
a memory having a plurality of memory areas for storing distance data obtained by the distance measuring means in correspondence with a corresponding rotation signal output by said rotation signal generating means; and
distance display means for displaying the distance data stored in the memory.
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Accused Products
Abstract
In a radio signal detecting system, an antenna is rotatably mounted on a wrist watch type case, and this antenna is manually rotated to receive a radio signal reflected from a target to be distance-measured every time the antenna is rotated by a preselected rotation angle. The reflected radio signal is digitally converted into field strength data, or distance data. These field strength data, or distance data are sequentially stored into a memory circuit in correspondence with the rotation angle of the antenna. Since the data stored into the memory circuit at every rotation angle for the antenna are displayed on a liquid crystal display unit, the radio signal detecting system can be made compact and operated under low power consumption.
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Citations
18 Claims
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1. A radio signal detecting system comprising:
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a rotatable antenna mounted on a device body and which is rotatable relative to the device body; rotation signal generating means for outputting a rotation signal every time when said rotatable antenna is rotated by a preselected rotation angle; distance measuring means for transmitting a radio signal every time the antenna is rotated by the preselected rotation angle, and for receiving the radio signal reflected from a target to obtain distance data representing a distance between the target and said radio signal detecting system; a memory having a plurality of memory areas for storing distance data obtained by the distance measuring means in correspondence with a corresponding rotation signal output by said rotation signal generating means; and distance display means for displaying the distance data stored in the memory. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A radio signal detecting system comprising:
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a wrist-watch-shaped case; an antenna rotatably mounted on the wrist-watch-shaped case and which is rotatable relative to said wrist-watch-shaped case; timer circuit means provided within said wrist-watch-shaped case, for producing present time information; time display means for displaying the present time information produced by said timer circuit means; distance measuring means for transmitting a radio signal every time the antenna is rotated by a preselected rotation angle, and for receiving the radio signal reflected from a target to obtain distance data representing a distance between the target and said radio signal detecting system; a memory having a plurality of memory areas for storing distance data obtained by the distance measuring means; and distance display means for displaying the distance data stored in the memory. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A radio signal detecting system comprising:
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an appliance case and which is rotatable relative to said appliance case; a first antenna rotatably mounted on said appliance case; rotation signal generating means for outputting a rotation signal every time said first antenna rotates by a predetermined angle; a second antenna fixedly mounted on said appliance case; electric field strength measuring means for measuring electric field strength of the radio signal reflected from a target and received by said first and second antennas every time said first antenna is rotated by a preselected rotation angle, to obtain electric field strength data; a memory having a plurality of memory areas for storing the electric field strength data obtained by said electric field strength measuring means in correspondence with the corresponding rotation signal output by said rotation signal generating means; and display means for displaying the electric field strength data stored in said memory. - View Dependent Claims (16, 17, 18)
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Specification