Abstract: A distance measurement device includes: a signal division unit to divide a digital signal into N digital signals (N is an integer equal to or greater than 2), the digital signal showing interference light between reflected light which is received from a distance measurement target, and reference light; a frequency shift unit to shift a frequency of each of the N digital signals after distribution; a Fourier transform unit to perform a Fourier transform on each of the N digital signals after frequency shift; and a distance calculation unit to determine a frequency component related to the distance measurement target, to determine a shift amount related to a signal after the Fourier transform which includes the determined frequency component, and to calculate the distance from the distance measurement device to the distance measurement target from the sum of the frequency of the determined frequency component and the determined shift amount.

Abstract: A radar signal processing device includes a frequency analysis unit for calculating a three-dimensional discrete frequency spectrum related to a first discrete frequency corresponding to a distance to a target object, a second discrete frequency corresponding to a relative speed of the target object, and a third discrete frequency corresponding to an angle of arrival of a series of frequency-modulated waves by performing first to third discrete orthogonal transform on digital received signals, a peak detection unit for detecting, for a discrete frequency value of at least one first search frequency, a discrete frequency value of a peak appearing in the three-dimensional discrete frequency spectrum in a direction of a second search frequency, and a maximum distribution detecting unit.

Abstract: First voltage data (V11 to V1n) and second voltage data (V21 to V2n) each correspond to ranges of the same transmitted signals (T1 to Tn) that have different modulation center frequencies. A speed calculating unit (50) calculates a moving speed of a radio-wave-reflecting object by calculating a reference speed (Sref) which is based on a difference value between the modulation center frequency (Fc_1) of the range of the transmitted signals (T1 to Tn) corresponding to the first voltage data (V11 to V1n) and the modulation center frequency (Fc_2) of the range of the transmitted signals (T1 to Tn) corresponding to the second voltage data (V21 to V2n), and comparing a plurality of speed candidates (Scand[m]) with the reference speed (Sref).

Abstract: A radar device includes a radar signal outputting unit that repeatedly outputs radar signals whose frequency changes with the passage of time, at a non-uniform repetition period.

Abstract: A highly accurate object identification is performed. A first feature quantity related to a relative distance and a relative speed to an object, the direction and the reflection intensity of the object, which are extracted by a first feature quantity extraction block, is made identical in time series in a data storage processing block; a second feature quantity is extracted in a second feature quantity extraction block; and a category of the object is determined by an object determination block on the basis of an attribution degree to the distribution of the second feature quantity related to a predetermined category calculated by an attribution degree calculation block.

Abstract: First voltage data (V11 to V1n) and second voltage data (V21 to V2n) each correspond to ranges of the same transmitted signals (T1 to Tn) that have different modulation center frequencies. A speed calculating unit (50) calculates a moving speed of a radio-wave-reflecting object by calculating a reference speed (Sref) which is based on a difference value between the modulation center frequency (Fc_1) of the range of the transmitted signals (T1 to Tn) corresponding to the first voltage data (V11 to V1n) and the modulation center frequency (Fc_2) of the range of the transmitted signals (T1 to Tn) corresponding to the second voltage data (V21 to V2n), and comparing a plurality of speed candidates (Scand[m]) with the reference speed (Sref).

Abstract: A stationary object decision processing unit 14 decides whether range R and Doppler frequency fd corresponding to peaks detected by the peak detection processing unit 13 satisfy geometric positional relationships between a radar and a stationary object. If they satisfy the geometric positional relationships, it recognizes that the object associated with the peaks is a stationary object. Thus, even if the number of peaks detected by the peak detection processing unit 13 increases, it can accurately decide whether the object associated with the peaks is a stationary object or not with a small amount of calculation.

Abstract: A highly accurate object identification is performed. A first feature quantity related to a relative distance and a relative speed to an object, the direction and the reflection intensity of the object, which are extracted by a first feature quantity extraction block, is made identical in time series in a data storage processing block; a second feature quantity is extracted in a second feature quantity extraction block; and a category of the object is determined by an object determination block on the basis of an attribution degree to the distribution of the second feature quantity related to a predetermined category calculated by an attribution degree calculation block.

Abstract: A stationary object decision processing unit 14 decides whether range R and Doppler frequency fd corresponding to peaks detected by the peak detection processing unit 13 satisfy geometric positional relationships between a radar and a stationary object. If they satisfy the geometric positional relationships, it recognizes that the object associated with the peaks is a stationary object. Thus, even if the number of peaks detected by the peak detection processing unit 13 increases, it can accurately decide whether the object associated with the peaks is a stationary object or not with a small amount of calculation.

Abstract: Provided is a golf club support on which a wooden club, etc. can be suspended in a desired direction while being prevented from falling or tumbling. The golf club support for supporting a golf club of which head portion has an R shape on a base end side has a columnar shape, has an opening 10 in the circumferential surface thereof, and has a guide portion 12 which is formed from the opening toward the inside. A first support member 16, a second support member 18, and a third support member 20 are formed on at least the top surface of the golf club support.

Abstract: A signal wave arrival angle measuring device includes: an observation data vector generation section generating an observation data vector necessary for an angle measurement of a signal wave from an electrical signal having been converted at a sensor group converting the signal wave of an observation target to the electrical signal; an ESPRIT angle measurement processing section calculating an arrival angle of the signal wave from the generated observation data vector; an arriving signal wave estimation section estimating information other than the arrival angle of the arriving signal wave from an angle measurement processing process data of the ESPRIT angle measurement processing at the ESPRIT angle measurement processing section; and a reliability determination section determining whether or not an angle measurement result of the calculated arrival angle is correct based on an estimation result of the arriving signal wave estimation section, and excluding an erroneous angle measurement result.

Abstract: Provided is a vehicular radar device which is capable of reducing an operation resource quantity necessary for a process of estimating an axis deviation angle in a radar measurement coordinate system, to thereby reduce a device size. The vehicular radar device includes: a measurement unit that measures an azimuth angle and a relative Doppler velocity; an extraction/accumulation unit that extracts target information satisfying conditions related to the relative Doppler velocity, a travel speed and a turning velocity, and accumulates the azimuth angle and a velocity ratio obtained by dividing the relative Doppler velocity by the travel speed of the subject vehicle among the extracted target information; and an axis deviation angle estimate unit that reads the target information accumulated in the extraction/accumulation unit, and estimates an axis deviation angle of the measurement coordinate system of a radar based on a second-order polynomial expression of the azimuth angle of the target.

Abstract: Provided is a vehicular radar device which is capable of reducing an operation resource quantity necessary for a process of estimating an axis deviation angle in a radar measurement coordinate system, to thereby reduce a device size. The vehicular radar device includes: a measurement unit that measures an azimuth angle and a relative Doppler velocity; an extraction/accumulation unit that extracts target information satisfying conditions related to the relative Doppler velocity, a travel speed and a turning velocity, and accumulates the azimuth angle and a velocity ratio obtained by dividing the relative Doppler velocity by the travel speed of the subject vehicle among the extracted target information; and an axis deviation angle estimate unit that reads the target information accumulated in the extraction/accumulation unit, and estimates an axis deviation angle of the measurement coordinate system of a radar based on a second-order polynomial expression of the azimuth angle of the target.

Abstract: Provided is a golf club support on which a wooden club, etc. can be suspended in a desired direction while being prevented from falling or tumbling. The golf club support for supporting a golf club of which head portion has an R shape on a base end side has a columnar shape, has an opening 10 in the circumferential surface thereof, and has a guide portion 12 which is formed from the opening toward the inside. A first support member 16, a second support member 18, and a third support member 20 are formed on at least the top surface of the golf club support.

Abstract: A signal wave arrival angle measuring device includes: an observation data vector generation section generating an observation data vector necessary for an angle measurement of a signal wave from an electrical signal having been converted at a sensor group converting the signal wave of an observation target to the electrical signal; an ESPRIT angle measurement processing section calculating an arrival angle of the signal wave from the generated observation data vector; an arriving signal wave estimation section estimating information other than the arrival angle of the arriving signal wave from an angle measurement processing process data of the ESPRIT angle measurement processing at the ESPRIT angle measurement processing section; and a reliability determination section determining whether or not an angle measurement result of the calculated arrival angle is correct based on an estimation result of the arriving signal wave estimation section, and excluding an erroneous angle measurement result.

Abstract: A radar device separates directions of a plurality of targets, obtained from combinations of antenna beams, with a high accuracy. The radar device includes: a direction calculating unit for calculating a primary direction, which is the direction of a target, from a combination of characterizing quantities calculated by a signal detector from the reception waves of at least two beams that partially overlap, among the beams radiated in the plurality of directions; and a direction integrating unit for, when a plurality of primary directions calculated by the direction calculating unit is present, calculating an integrated direction, which is the true target direction, from an area in which distribution of the plurality of primary directions is a predetermined density or greater, based on the primary directions belonging to the area.

Abstract: For enabling determination on whether a sign of a Doppler frequency or a target angle is positive or negative even when only a real signal can be obtained as a received signal, the present invention provides a radar device including: an oscillator; a transmitting element; a distributor; receivers using the local wave to detect the received wave to generate a real received signal; a plurality of inter-channel phase correcting units; a spatial frequency information generating unit for converting a received signal string obtained by gathering a plurality of phase-corrected received signals into a signal in a spatial frequency domain; and a sign selecting unit for selecting a signal having a larger amplitude in a spatial frequency spectrum when two signals from a positive direction and a negative direction which are symmetrical with respect to a direction at approximately 0 degree.

Abstract: To provide a radar device which employs fast Fourier transform in a beam combining process to reduce the operation amount, the radar device including: a Fourier transform section that extracts a received signal that is obtained from waves radiated from a same transmitting element and received by a receiving element, and subjects a signal series of the extracted received signal to Fourier transform to generate a signal of a spatial frequency domain; a phase compensation section that compensates the signal of the spatial frequency domain with a phase difference that is caused by a difference between a predetermined reference position and a position of the used transmitting element; and a coherent integration section that adds the signals of the spatial frequency domain after the signals have been subjected to the phase compensation processing, which are obtained with the plurality of transmitting elements, in each of the spatial frequencies.

Abstract: For enabling determination on whether a sign of a Doppler frequency or a target angle is positive or negative even when only a real signal can be obtained as a received signal, the present invention provides a radar device including: an oscillator; a transmitting element; a distributor; receivers using the local wave to detect the received wave to generate a real received signal; a plurality of inter-channel phase correcting units; a spatial frequency information generating unit for converting a received signal string obtained by gathering a plurality of phase-corrected received signals into a signal in a spatial frequency domain; and a sign selecting unit for selecting a signal having a larger amplitude in a spatial frequency spectrum when two signals from a positive direction and a negative direction which are symmetrical with respect to a direction at approximately 0 degree.

Abstract: To provide a radar device which employs fast Fourier transform in a beam combining process to reduce the operation amount, the radar device including: a Fourier transform section that extracts a received signal that is obtained from waves radiated from a same transmitting element and received by a receiving element, and subjects a signal series of the extracted received signal to Fourier transform to generate a signal of a spatial frequency domain; a phase compensation section that compensates the signal of the spatial frequency domain with a phase difference that is caused by a difference between a predetermined reference position and a position of the used transmitting element; and a coherent integration section that adds the signals of the spatial frequency domain after the signals have been subjected to the phase compensation processing, which are obtained with the plurality of transmitting elements, in each of the spatial frequencies.