# US 9,429,648 B2 · Radar apparatus and computer-readable storage medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,429,648 B2 - Document ID: US9429648B2 - Status: Granted - Kind: B2 - Application number: 14/180,905 - Filed: 2014-02-14 - Published: 2014-10-30 - Granted: 2016-08-30 - Earliest claimed: 2013-03-29 - Assignees: Fujitsu Limited - Applicants: Fujitsu Limited - Inventors: Yuuichi Sugiyama - Web page: https://patentgrep.com/patent/US9429648B2 ## CPC - G01S 13/02: Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems - G01S 13/58: Velocity or trajectory determination systems; Sense-of-movement determination systems - G01S 13/92: for velocity measurement - G01S 13/34: using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES ## Abstract A radar apparatus includes a detection unit to detect objects within a scan range based on a reflected wave received with respect to a transmission wave and to output detection results of the objects, and an adjusting unit to narrow the scan range so as not to detect an object other than a target object, when the detection results include the object other than the target object detected in the scan range within a predetermined time. The adjusting unit judges an object having a velocity less than a first value as the object other than the target object. ## Claims ### Claim 1 A radar apparatus comprising: a storage configured to store a program; and a processor configured to execute the program and perform a process including detecting objects within a scan range based on a reflected wave received with respect to a transmission wave, to output detection results of the objects; and narrowing the scan range so as not to detect an object other than a target object, when the detection results include the object other than the target object detected in the scan range within a predetermined time, wherein the narrowing includes judging an object having a velocity less than a first value as the object other than the target object. ### Claim 2 (depends on 1) The radar apparatus as claimed in claim 1, wherein the processor performs the process further including returning a narrowed scan range that is narrowed by the narrowing, back to the scan range before being narrowed by the narrowing, after a certain time elapses from the narrowing. ### Claim 3 (depends on 1) The radar apparatus as claimed in claim 1, wherein the judging judges an object having an acceleration less than a second value as the object other than the target object. ### Claim 4 (depends on 3) The radar apparatus as claimed in claim 3, wherein the first value and the second value are zero. ### Claim 5 (depends on 1) The radar apparatus as claimed in claim 1, wherein the narrowing electronically narrows the scan range. ### Claim 6 (depends on 1) The radar apparatus as claimed in claim 1, wherein the narrowing mechanically narrows the scan range. ### Claim 7 (depends on 1) The radar apparatus as claimed in claim 1, wherein the predetermined time amounts to one measuring period for detecting the objects. ### Claim 8 A non-transitory computer-readable storage medium having stored therein a program which, when executed by a computer of a radar apparatus, causes the computer to perform a process comprising: detecting objects within a scan range based on a reflected wave received by an antenna unit of the radar apparatus with respect to a transmission wave transmitted from the radar unit, and outputting detection results of the objects; and narrowing the scan range so as not to detect an object other than a target object, when the detection results include the object other than the target object detected in the scan range within a predetermined time, wherein the narrowing includes judging an object having a velocity less than a first value as the object other than the target object. ### Claim 9 (depends on 8) The non-transitory computer-readable storage medium as claimed in claim 8, wherein the program which, when executed by the computer of the radar apparatus, causes the computer to perform the process further comprising: returning a narrowed scan range that is narrowed by the narrowing, back to the scan range before being narrowed by the narrowing, after a certain time elapses from the narrowing. ### Claim 10 (depends on 8) The non-transitory computer-readable storage medium as claimed in claim 8, wherein the judging judges an object having an acceleration less than a second value as the object other than the target object. ### Claim 11 (depends on 10) The non-transitory computer-readable storage medium as claimed in claim 10, wherein the first value and the second value are zero. ### Claim 12 (depends on 8) The non-transitory computer-readable storage medium as claimed in claim 8, wherein the narrowing electronically narrows the scan range. ### Claim 13 (depends on 8) The non-transitory computer-readable storage medium as claimed in claim 8, wherein the narrowing mechanically narrows the scan range. ### Claim 14 (depends on 8) The non-transitory computer-readable storage medium as claimed in claim 8, wherein the predetermined time amounts to one measuring period for detecting the objects. ### Claim 15 (depends on 8) The non-transitory computer-readable storage medium as claimed in claim 8, wherein the target object is a vehicle, and the object other than the target object is a structure that does not move, or a traffic jam that is formed by a vehicle sequence including a plurality of vehicles, greater than or equal to a predetermined number, and respectively having a velocity less than or equal to a predetermined velocity. ### Claim 16 A radar apparatus comprising: a transmitter configured to transmit a transmission wave; a receiver configured to receive a reflected wave with respect to the transmission wave; a storage configured to store a program; and a processor configured to execute the program and perform a process including detecting objects within a scan range of the transmission wave transmitted from the transmitter based on the reflected wave received by the receiver with respect to the transmission wave, to output detection results of the objects; and narrowing the scan range so as not to detect an object other than a target object, when the detection results include the object other than the target object detected in the scan range within a predetermined time, wherein the narrowing includes judging an object having a velocity less than a first value as the object other than the target object. ### Claim 17 (depends on 16) The radar apparatus as claimed in claim 16, wherein the judging judges an object having an acceleration less than a second value as the object other than the target object. ### Claim 18 (depends on 17) The radar apparatus as claimed in claim 17, wherein the first value and the second value are zero. ### Claim 19 (depends on 16) The radar apparatus as claimed in claim 16, wherein the narrowing electronically narrows the scan range. ### Claim 20 (depends on 16) The radar apparatus as claimed in claim 16, wherein the narrowing mechanically narrows the scan range.