# US 2015/0146191 A1 · Radar device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2015/0146191 A1 - Document ID: US20150146191A1 - Status: Published application - Kind: A1 - Application number: 14/404,294 - Filed: 2013-03-04 - Published: 2015-05-28 - Earliest claimed: 2012-08-08 - Assignees: Mitsubishi Electric Corporation - Applicants: Mitsubishi Electric Corporation - Inventors: Nobuki Kotake; Masaharu Imaki; Shumpei Kameyama - Web page: https://patentgrep.com/patent/US20150146191A1 ## CPC - G01S 17/95: for meteorological use - G01S 7/4817: {relating to scanning} - G01S 7/4818: {using optical fibres} - G01S 7/484: Transmitters - G01S 7/4868: {Controlling received signal intensity or exposure of sensor} - G01S 7/487: Extracting wanted echo signals {, e.g. pulse detection} - G01S 17/42: Simultaneous measurement of distance and other co-ordinates (indirect measurement G01S17/46) - G01S 17/58: Velocity or trajectory determination systems; Sense-of-movement determination systems - Y02A 90/10: Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation - 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 - Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE ## Abstract An optimal position analysis unit 24 specifies an optimal installation position for a photodetector 6 by using spectra which by a spectrum and wind speed computing unit 23 calculated by analyzing output data of a photodetector 6 installed at different installation positions, controls a position adjustment made by an optical unit adjustment driving unit 7, and optimizes the installation position of the photodetector 6. ## Claims ### Claim 1 A radar device comprising: an optical oscillator that oscillates light; a light transmitter and receiver that has an optical system that emits the light oscillated by said optical oscillator into atmospheric air and also receives said light which is reflected by an observation object existing in the atmospheric air and returns thereto, and that outputs data showing a signal intensity of the light received by said optical system; a spectrum and speed calculator that calculates a spectrum by analyzing the data outputted from said light transmitter and receiver, and also calculates a speed of said observation object and a signal to noise ration for each distance to said observation object from said spectrum; an optical condition adjuster that adjusts an optical condition of said light transmitter and receiver; and an optical condition optimizer that determines said optical condition from a distance where said signal to noise ration calculated by said spectrum and speed calculator crosses a threshold again after exceeding said threshold. ### Claim 2 (depends on 1) The radar device according to claim 1, wherein said optical condition adjuster adjusts, as the optical condition of said light transmitter and receiver, a position where said light transmitter and receiver is installed, and said optical condition optimizer determines the installation position of said light transmitter and receiver from the distance where said signal to noise ratio calculated by said spectrum and speed calculator crosses the threshold again after exceeding said threshold. ### Claim 3 (depends on 1) The radar device according to claim 1, wherein said optical condition adjuster adjusts, as the optical condition of said light transmitter and receiver, a focus of said optical system, and said optical condition optimizer determines the focus of said optical system from the distance where said signal to noise ratio calculated by said spectrum and speed calculator crosses the threshold again after exceeding said threshold. ### Claim 4 (depends on 1) The radar device according to claim 1, wherein an observation result outputter that stores the speed of said observation object calculated by said spectrum and speed calculator and also displays the speed of said observation object is disposed. ### Claim 5 (depends on 2) The radar device according to claim 2, wherein a storage that stores a spectrum calculated by said spectrum and speed calculator and also stores the installation position of said light transmitter and receiver at a time when said spectrum is calculated is disposed, and said optical condition optimizer searches through one or more installation positions of said light transmitter and receiver which are stored in said storage for the installation position of said light transmitter and receiver by using one or more spectra stored in said storage. ### Claim 6 (depends on 3) The radar device according to claim 3, wherein a storage that stores a spectrum calculated by said spectrum and speed calculator and also stores the focus of said optical system at a time when said spectrum is calculated is disposed, and said optical condition optimizer searches through one or more focuses of said optical system which are stored in said storage for the focus of said optical system by using one or more spectra stored in said storage. ### Claim 7 (depends on 1) The radar device according to claim 1, wherein the radar device includes a number-of-integrations setter that, when said spectrum and speed calculator uses a method of splitting time-series data outputted from said light transmitter and receiver into range bins, and performing integration processing within each of the range bins to calculate the speed of said observation object, sets up a number of integration times in the integration processing within said each of the range bins. ### Claim 8 (depends on 2) The radar device according to claim 2, wherein the radar device includes a number-of-integrations setter that, when said spectrum and speed calculator uses a method of splitting time-series data outputted from said light transmitter and receiver into range bins, and performing integration processing within each of the range bins to calculate the speed of said observation object, sets up a number of integrations in the integration processing within said each of the range bins, and wherein said optical condition optimizer searches for the installation position of said light transmitter and receiver while controlling the number of integrations set by said number-of-integrations setter. ### Claim 9 (depends on 3) The radar device according to claim 3, wherein the radar device includes a number-of-integrations setter that, when said spectrum and speed calculator uses a method of splitting time-series data outputted from said light transmitter and receiver into range bins, and performing integration processing within each of the range bins to calculate the speed of said observation object, sets up a number of integrations in the integration processing within said each of the range bins, and wherein said optical condition optimizer searches for the focus of said optical system while controlling the number of integrations set by said number-of-integrations setter. ### Claim 10 (depends on 2) The radar device according to claim 2, wherein a model storage that stores a model of an envelope function in a spectrum is disposed, and wherein said optical condition optimizer compares an envelope of a spectrum calculated by said spectrum and speed calculator and an envelope acquired from the model stored in said model storage, reconstructs a model under a current environment in which said observation object exists, and controls the position adjustment made by said optical condition adjuster by using said model. ### Claim 11 (depends on 3) The radar device according to claim 3, wherein a model storage that stores a model of an envelope function in a spectrum is disposed, and wherein said optical condition optimizer compares an envelope of a spectrum calculated by said spectrum and speed calculator and an envelope acquired from the model stored in said model storage, reconstructs a model under a current environment in which said observation object exists, and controls the focus adjustment made by said optical condition adjuster by using said model. ### Claim 12 (depends on 1) The radar device according to claim 1, wherein when the light emitted from the optical system of said light transmitter and receiver and the light received by said optical system are non-coaxial, said optical condition optimizer calculates the installation position of said light transmitter and receiver on a basis of both an angle difference between the light emitted from said optical system and the light received by said optical system, and a distance to said observation object to be measured before determining the optical condition of said light transmitter and receiver, and said optical condition adjuster adjusts the installation position of said light transmitter and receiver in such a way that the installation position of said light transmitter and receiver matches a result of the calculation by said optical condition optimizer. ### Claim 13 (depends on 12) The radar device according to claim 12, wherein said optical condition adjuster corrects a displacement between a receiving field of view of light by said light transmitter and receiver and an incoming direction of light by adjusting a position of a fiber end in said light transmitter and receiver which receives the light. ### Claim 14 (depends on 1) The radar device according to claim 1, wherein the radar device includes a number-of-integrations setter that, when said spectrum and speed calculator uses a method of splitting time-series data outputted from said light transmitter and receiver into range bins, and performing integration processing within each of the range bins to calculate the speed of said observation object, sets up a number of integrations in the integration processing within each of the range bins, and wherein said optical condition optimizer controls the number of integrations set by said number-of-integrations setter in such a way that a signal to noise ratio of each of the range bins is equal to or higher than a threshold. ### Claim 15 (depends on 1) The radar device according to claim 1, wherein the radar device includes a number-of-integrations setter that, when said spectrum and speed calculator uses a method of splitting time-series data outputted from said light transmitter and receiver into range bins, and performing integration processing within each of the range bins to calculate the speed of said observation object, sets up a number of integrations in the integration processing within each of the range bins, and a beam diameter setter that sets up a beam diameter of the light emitted from the optical system of said light transmitter and receiver, and wherein said optical condition optimizer controls the number of integrations set by said number-of-integrations setter in such a way that a signal to noise ratio of each of the range bins at the beam diameter set by said beam diameter setter is equal to or higher than a threshold. ### Claim 16 (depends on 1) The radar device according to claim 1, wherein the radar device includes a number-of-integrations setter that, when said spectrum and speed calculator uses a method of splitting time-series data outputted from said light transmitter and receiver into range bins, and performing integration processing within each of the range bins to calculate the speed of said observation object, sets up a number of integrations in the integration processing within each of the range bins, and a beam diameter setter that sets up a beam diameter of the light emitted from the optical system of said light transmitter and receiver, and wherein said optical condition optimizer controls the beam diameter set by said beam diameter setter in such a way that a signal to noise ratio of each of the range bins at the number of integrations set by said number-of-integrations setter is equal to or higher than a threshold. ### Claim 17 A radar device comprising: an optical oscillator that oscillates light; a light transmitter and receiver that has an optical system that emits the light oscillated by said optical oscillator into atmospheric air and also receives said light which is reflected by an observation object existing in the atmospheric air and returns thereto, and that outputs data showing a signal intensity of the light received by said optical system; a spectrum and speed calculator that calculates a spectrum by analyzing the data outputted from said light transmitter and receiver, and also calculates a speed of said observation object; and a number-of-integrations setter that, when said spectrum and speed calculator uses a method of splitting time-series data outputted from said light transmitter and receiver into range bins, and performing integration processing within each of the range bins to calculate the speed of said observation object, sets up a number of integrations in the integration processing within each of the range bins. ### Claim 18 A radar device comprising: an optical oscillator that oscillates light; a light transmitter and receiver that has an optical system that emits the light oscillated by said optical oscillator into atmospheric air and also receives said light which is reflected by an observation object existing in the atmospheric air and returns thereto, and that outputs data showing a signal intensity of the light received by said optical system; a spectrum and speed calculator that calculates a spectrum by analyzing the data outputted from said light transmitter and receiver, and also calculates a speed of said observation object; and a beam diameter setter that sets up a beam diameter of the light emitted from the optical system of said light transmitter and receiver.