Abstract: A travel distance measurement device includes a transmitting antenna that is disposed in a vehicle and emits a transmission signal, as a radio wave, toward a ground surface, a receiving antenna that is disposed in the vicinity of the transmitting antenna, and receives a radio wave reflected from the ground surface and acquires a reflection signal, and a distance calculator (an IQ demodulator and a phase conversion integrator) that calculates the travel distance of the vehicle on the basis of the phase of the acquired reflection signal.

Abstract: A travel distance measurement device includes a transmitting antenna that is disposed in a vehicle and emits a transmission signal, as a radio wave, toward a ground surface, a receiving antenna that is disposed in the vicinity of the transmitting antenna, and receives a radio wave reflected from the ground surface and acquires a reflection signal, a distance calculator (an IQ demodulator and a phase conversion integrator) that calculates the travel distance of the vehicle on the basis of the acquired reflection signal, a gyro sensor that measures a predetermined parameter regarding curve traveling of the vehicle, and a correcting operation unit that corrects the calculated travel distance on the basis of the measured parameter.

Abstract: A reflector apparatus includes reflectors, which respectively radiate reflected waves in predetermined polarization directions. A polarized wave information reading circuit fixed to a moving body radiates a radio wave toward the reflecting apparatus from a transmitting antenna, receives reflected waves from the reflecting apparatus, and generates a received level difference signal that corresponds to a polarization direction of the received reflected waves. A position calculating circuit calculates a position of the polarized wave information reading circuit based on the received level difference signal.

Abstract: In an intruder identifying method and device, an intruder identifying sensor device identifies an intruder as a detection target to be originally detected by determining whether a variation style for a predetermined time of intruder intrusion state information based on the reception signal of the electric wave receiving unit during a time period from the time when the intruder identifying sensor device detects an intruder till the time when the intruder identifying sensor device does not detect the intruder is a predetermined variation style.

Abstract: In a vehicle inclination detecting device, a receiving unit includes a switching unit for alternately switching between a received signal from a first receiving antenna and a received signal from a second receiving antenna to alternately output the received signals to an orthogonal detector. The orthogonal detector carries out orthogonal detection on each of the two received signals from the switching unit and an oscillating signal from an oscillator by using an identical line.

Abstract: A monitoring system for a moving object including a leaking transmission device having a first and second leaking transmission paths extending substantially in parallel to each other, first equipment for transmitting a first transmission signal from one end side of both the ends of the leaking transmission device as a transmission medium to the other end side, second equipment for transmitting a second transmission signal from the other end side of both the ends of the leaking transmission device as the transmission medium to the one end side, and a detector for detecting a two-dimensional movement of a moving object as a monitoring target on the basis of a difference between variations of first and second reception signals based on the respective reflection waves of the first and second transmission signals from the moving object.

Abstract: An obstacle detecting system having leakage coaxial cables laid on at both the sides of an obstacle monitoring district and an obstacle detecting device for emitting electrical waves from one of the leakage coaxial cables laid on at both the sides to the other leakage coaxial cable and detecting an obstacle in the obstacle monitoring district on the basis of the electrical waves incident to the other leakage coaxial cable is further equipped with an electrical wave transmitting unit for transmitting the electrical waves to the one leakage coaxial cable in the obstacle detecting device, an electrical wave receiving unit for receiving the electrical waves incident to the other leakage coaxial cable, and a connecting unit for connecting the electrical wave transmitting unit and the electrical wave receiving unit.

Abstract: A normalization processing circuit normalizes a position of a complex demodulation signal on a complex plane from an A/D converter, and outputs a normalized complex demodulation signal after the normalization to a multiple-dimensional feature extractor. The multiple-dimensional feature extractor calculates a feature quantity that changes when a person intrudes, a feature quantity that changes in wind and rain, and a feature quantity that changes when a spatially isolated intense electric field exists. A discriminator discriminates that a person has intruded based on the feature quantities of three dimensions.

Abstract: A velocity measurement apparatus comprising: first and second surface profile sensors for acquiring first and second surface profile data, a memory for storing the first and second surface profile data, and a calculation unit for calculating a velocity of a moving object. Each surface profile sensors acquires the corresponding surface profile data by measuring signal levels of reflected waves corresponding to a radio wave emitted to a ground surface and then reflected from structures on the ground surface, and measuring propagation durations from the emission of the radio wave to the return of the respective reflected waves. The calculation unit compares the first and second surface profile data, determines a difference between their measurement times, and divides a distance between the first and second surface profile sensors by the difference between the measurement times to calculate the velocity of the moving object.

Abstract: An intruder detection system is provided in which a detection range can be set to a predetermined one so that false detection caused by a moving object outside the predetermined range can be diminished. The system includes a transmission-side leaky transmission line that radiates a detection signal for detecting an intruder and a reception-side leaky transmission line that receives a detection signal leaked from the transmission-side leaky transmission line, both of which are buried spaced apart from each other in a detection surveillance area, and detects the presence/absence of an intruder in the detection surveillance area based on variations in the detection signal received by the reception-side leaky transmission line, wherein at least part of either the transmission-side leaky transmission line or the reception-side leaky transmission line is made of a surface-wave-type leaky coaxial transmission line, and the other leaky transmission line, a radiation-type leaky coaxial transmission line.

Abstract: A method determining a malfunction when a reception signal fluctuates at a receiver owing to malfunctions occurring on a leaky cable and its related devices. The method determines, among range bins correlating the reception signal with a distance from a feed end of a radio-wave radiation unit and a radio-wave reception unit, based on a correlation between a time-delay from a transmission time of a transmission signal until a reception time of the reception signal and a transmission path distance of the reception signal in the radio-wave radiation unit and the radio-wave reception unit, when, comparing the reception signal with the transmission signal with respect to the range bin corresponding to a far end, a level of amplitude reduction in the reception signal exceeds a predetermined ratio, that a malfunction is present in either the radio-wave radiation unit or radio-wave reception unit.

Abstract: A monitoring system for a moving object including a leaking transmission device having a first and second leaking transmission paths extending substantially in parallel to each other, first equipment for transmitting a first transmission signal from one end side of both the ends of the leaking transmission device as a transmission medium to the other end side, second equipment for transmitting a second transmission signal from the other end side of both the ends of the leaking transmission device as the transmission medium to the one end side, and a detector for detecting a two-dimensional movement of a moving object as a monitoring target on the basis of a difference between variations of first and second reception signals based on the respective reflection waves of the first and second transmission signals from the moving object.

Abstract: An obstacle detecting system having leakage coaxial cables laid on at both the sides of an obstacle monitoring district and an obstacle detecting device for emitting electrical waves from one of the leakage coaxial cables laid on at both the sides to the other leakage coaxial cable and detecting an obstacle in the obstacle monitoring district on the basis of the electrical waves incident to the other leakage coaxial cable is further equipped with an electrical wave transmitting unit for transmitting the electrical waves to the one leakage coaxial cable in the obstacle detecting device, an electrical wave receiving unit for receiving the electrical waves incident to the other leakage coaxial cable, and a connecting unit for connecting the electrical wave transmitting unit and the electrical wave receiving unit.

Abstract: A method determining a malfunction when a reception signal fluctuates at a receiver owing to malfunctions occurring on a leaky cable and its related devices. The method determines, among range bins correlating the reception signal with a distance from a feed end of a radio-wave radiation unit and a radio-wave reception unit, based on a correlation between a time-delay from a transmission time of a transmission signal until a reception time of the reception signal and a transmission path distance of the reception signal in the radio-wave radiation unit and the radio-wave reception unit, when, comparing the reception signal with the transmission signal with respect to the range bin corresponding to a far end, a level of amplitude reduction in the reception signal exceeds a predetermined ratio, that a malfunction is present in either the radio-wave radiation unit or radio-wave reception unit.

Abstract: A position detection sensor using electromagnetic wave (1) estimates the position of a monitor object (100) in a first detection region (101), and outputs it as a first possibility distribution. A second sensor (4) estimates the position of the monitor object (100) in a second detection region (102), and outputs it as a second possibility distribution. A distribution computing means (5) outputs an integrated possibility distribution which it obtains by integrating the possibility distributions of the position of the monitor object 100 which are acquired by these sensors. An information presenting means (6) outputs the integrated possibility distribution as information about the most possible position of the monitor object (100).

Abstract: In an intruder identifying method and device, an intruder identifying sensor device identifies an intruder as a detection target to be originally detected by determining whether a variation style for a predetermined time of intruder intrusion state information based on the reception signal of the electric wave receiving unit during a time period from the time when the intruder identifying sensor device detects an intruder till the time when the intruder identifying sensor device does not detect the intruder is a predetermined variation style.

Abstract: An intruder detection system is provided in which a detection range can be set to a predetermined one so that false detection caused by a moving object outside the predetermined range can be diminished. The system includes a transmission-side leaky transmission line that radiates a detection signal for detecting an intruder and a reception-side leaky transmission line that receives a detection signal leaked from the transmission-side leaky transmission line, both of which are buried spaced apart from each other in a detection surveillance area, and detects the presence/absence of an intruder in the detection surveillance area based on variations in the detection signal received by the reception-side leaky transmission line, wherein at least part of either the transmission-side leaky transmission line or the reception-side leaky transmission line is made of a surface-wave-type leaky coaxial transmission line, and the other leaky transmission line, a radiation-type leaky coaxial transmission line.

Abstract: A leaky cable having radiation directivity which varies with frequency transmits electric waves in different frequency bands. A measurement apparatus outputs measurement information including signal intensity and phase of a reflected electric wave in each frequency band which is reflected by a target and is received by another leaky cable, and propagation delay time. A calculator groups the measurement information by target on the basis of signal intensities and phases of the reflected electric waves in different frequency bands, and calculates the position of the target with respect to the longitudinal direction of the leaky cables and the distance between the target and the leaky cables.

Abstract: A position detection sensor using electromagnetic wave (1) estimates the position of a monitor object (100) in a first detection region (101), and outputs it as a first possibility distribution. A second sensor (4) estimates the position of the monitor object (100) in a second detection region (102), and outputs it as a second possibility distribution. A distribution computing means (5) outputs an integrated possibility distribution which it obtains by integrating the possibility distributions of the position of the monitor object 100 which are acquired by these sensors. An information presenting means (6) outputs the integrated possibility distribution as information about the most possible position of the monitor object (100).

Abstract: A leaky cable having radiation directivity which varies with frequency transmits electric waves in different frequency bands. A measurement apparatus outputs measurement information including signal intensity and phase of a reflected electric wave in each frequency band which is reflected by a target and is received by another leaky cable, and propagation delay time A calculator groups the measurement information by target on the basis of signal intensities and phases of the reflected electric waves in different frequency bands, and calculates the position of the target with respect to the longitudinal direction of the leaky cables and the distance between the target and the leaky cables.