Motoi Nakanishi
Motoi Nakanishi, Nagaokakyo-Shi JP
Patent application number | Description | Published |
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20090015462 | Radar Apparatus and Mobile Object - A signal processing circuit detects, at a plurality of different timing points, a first and a second distance of an oncoming vehicle approaching a vehicle including the radar apparatus and detects a first and a second component of a relative velocity of the vehicle in the radar-apparatus direction. A distance of closest approach of the oncoming vehicle to the vehicle appears when the vehicle and the oncoming vehicle pass each other side by side. The signal processing circuit computes the distance of closest approach on the basis of a formula indicating that a relative velocity given by the first distance, the distance of closest approach, and the first component of a relative velocity in the radar-apparatus direction is equal to a relative velocity given by the second distance, the distance of closest approach, and the second component of a relative velocity in the radar-apparatus direction. | 01-15-2009 |
20100271257 | Radar apparatus - To prevent erroneous tracking of a false target, increase reliability of target tracking, enhance continuous tracking of a real target, and thereby prevent erroneous target recognition and improve the recognition accuracy, a target is tracked on the basis of detection information that is included in detection information obtained at a plurality of different measurement time points and is estimated to have resulted from one and the same reflector; tracking reliability indicating a likelihood that a target currently being tracked has resulted from one and the same reflector is determined; and a recognition condition required for recognizing a real target is set according to the tracking reliability or its change. | 10-28-2010 |
20110050484 | Radar - A frequency spectrum of a beat signal of a transmission signal and a reception signal is determined. Whether or not the number of peaks exceeding a noise threshold in the frequency spectrum exceeds a predetermined number is determined. According to the determination result, presence or absence of interference on the beat signal is detected. If “interference exists”, the threshold for extraction of target peaks that appear on the frequency spectrum is increased. This allows detection of presence or absence of a spike noise to be superposed on the beat signal to be performed more certainly, thereby enabling processing according to presence or absence of interference. | 03-03-2011 |
Motoi Nakanishi, Kanagawa JP
Patent application number | Description | Published |
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20080252901 | Wavelength-Tunable Light Source And Optical Coherence Tomography - The present invention provides an OCT technique that permits tomographic observation of a biological body parts that is difficult to restrain and also provides a tomographic observation technique for the observation of a constrainable part that does not require constraint and remove the burden from biological body. A wavelength-tunable light generator (wavelength-tunable light source) is employed as the light source of the optical coherence tomography device. The wavelength-tunable light generator has a wave number tunable range width of at least 4.7×10 | 10-16-2008 |
20090273790 | WAVELENGTH-TUNABLE LIGHT GENERATOR AND OPTICAL COHERENCE TOMOGRAPHY DEVICE - The present invention provides an OCT technique that permits tomographic observation of a biological body parts that is difficult to restrain and also provides a tomographic observation technique for the observation of a constrainable part that does not require constraint and remove the burden from biological body. A wavelength-tunable light generator (wavelength-tunable light source) is employed as the light source of the optical coherence tomography device. The wavelength-tunable light generator has a wave number tunable range width of at least 4.7×10 | 11-05-2009 |
Motoi Nakanishi, Kyoto-Fu JP
Patent application number | Description | Published |
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20080218406 | Radar - A radar wherein, in response to an increase in the level of noise appearing in a frequency spectrum caused by interference being superimposed on a beat signal, peaks exceeding a threshold are extracted as target peaks in an ordinary state and a predetermined number of peaks in descending order starting from the peak having the highest peak value are extracted in the case where interference occurs. | 09-11-2008 |
20090009383 | RADAR SYSTEM - A radar system transmits a beam of detection radio waves with a predetermined azimuth width, receives a reflected wave from a target, changes a central azimuth of the beam, and detects the distribution of reception signal strengths at predetermined angular intervals and for each predetermined distance. Then, when the reception signal strength distribution associated with changes in azimuth is expressed in rectangular coordinates, an azimuth corresponding to a vertex of an isosceles triangle that approximates the reception signal strength distribution and has an azimuth width, which is determined by the beam azimuth width, as its base is detected as the central azimuth of the target. Thus, the radar system becomes capable of detecting the azimuth of a target at a resolution capability higher than in the case where the movement of a target cannot be detected at a resolution equal to or less than the beam width of detection radio waves, and higher than in the case where a resolution in the azimuth direction is determined by the sampling interval in the azimuth direction. Moreover, the problem of deviation of the peak position of a reception signal strength from the center of a target can be solved. | 01-08-2009 |