Back to results
US 7,068,214 B2Granted
Radar
AssigneeFujitsu Ten Limited
InventorsEtsuo Kakishita, Kimihisa Yoneda
Life of this patent
Estimating the term…
Abstract
A transmission wave is transmitted to a target from a transmission section. A receiving section receives a wave reflected from the target as a received wave. A conversion section converts a time difference between the transmission time at which a transmission wave is transmitted and the receiving time at which a received wave is received in to a voltage. The thus-obtained voltage is subjected to analog-to-digital conversion by means of a processing circuit, whereby a distance is computed.
Claims6
A radar, comprising:
- a transmission section that transmits a transmission wave;
- a receiving section that receives, as a received wave, a wave reflected from a target;
- a conversion section that converts, into an electric signal level, a time difference existing between a time at which the transmission wave is transmitted and a time at which the received wave is received;
- and
- a computation section that computes a distance to the target on the basis of the electrical signal level output from the conversion section, wherein
- the conversion section performs conversion based on a conversion characteristic defined so that a change in the electrical signal level of a portion of the conversion characteristic having a small time difference becomes larger than a change in the electrical signal level of a portion of the conversion characteristic having a large time difference.
3 more elements
A radar, comprising:
- a transmission section that transmits a transmission wave;
- a receiving section that receives, as a received wave, a wave reflected from a target;
- a conversion section that converts into an electrical signal level, a time difference determined by subtracting a lag time of an electrical circuit from a time difference between the transmission time at which the transmission wave is transmitted and a receiving time at which the received wave is received, the electrical circuit including at least one of the transmission section and the receiving section;
- and
- a computation section that computes a distance to the target on the basis of the electrical signal level output from the conversion section.
2 more elements
Dependencies are inferred from the claim text.