Abstract: A positioning device includes: an antenna part with N antenna elements forming a plurality of pairs of antenna elements, N being an integer greater than or equal to three; a selection part configured to select a pair of antenna elements whose phase shift quality is higher than or equal to a predetermined level, based on a phase shift observed between phases of a signal received by respective antenna elements in a pair when each of the plurality of pairs receives the signal from a positioning target device; and a distance measurement part configured to measure a distance between the positioning target device and the antenna part based on phases of signals communicated between the positioning target device and one antenna element included in the pair selected by the selection part.

Abstract: A distance measuring system includes a plurality of first communication stations, and a plurality of second communication stations. A first communication station of the plurality of first communication stations or a second communication station of the plurality of second communication stations includes a processor, and a memory storing program instructions that cause the processor to perform a distance measuring process of measuring a distance between the first communication station and the second communication station based on a result obtained from a signal transmitted bidirectionally between the first communication station and the second communication station, and set a frequency at which the distance measuring process is performed according to the measured distance.

Abstract: A ranging method is performed in a ranging system, the ranging system including a first communication station; and a plurality of second communication stations configured to measure a distance to the first communication station by bidirectionally transmitting and receiving signals of a plurality of frequencies to and from the first communication station, wherein when the plurality of second communication stations receive a request signal from the first communication station, the plurality of second communication stations transmit ranging data representing the measured distance to the first communication station.

Abstract: A ranging device extracts N signal pairs corresponding to N (N>=2) signal strengths excluding one or more signal strengths less than a threshold value among signal strengths of the signal pairs of the first signals and the second signals from the plurality of signal pairs, obtains a reciprocating phase obtained by summing the first phases and the second phases of the first signals and the second signals included in each signal pair for the N signal pairs, and measures a distance to the other device based on the N reciprocating phases and the plurality of frequencies.

Abstract: An angle measuring device includes an antenna device having antenna elements equally spaced along a first axis and a second axis, respectively, a selecting unit that selects phase differences with which a variance thereof becomes a predetermined value or less, from a plurality of phase differences of signals received from a transmission device by the antenna elements, an azimuth angle computing unit that computes an azimuth angle of the transmission device from a ratio of a first phase difference between signals received by two antenna elements spaced by a predetermined distance along the first axis and a second phase difference between signals received by two antenna elements space by the predetermined distance along the second axis, and an elevation angle computing unit that computes an elevation angle of the transmission device, based on the computed azimuth angle and the first or second phase difference.

Abstract: An electrostatic input device includes a capacitance detector that is disposed at an operation part to be operated by a living body, and is configured to detect capacitance; and a controller that is formed of an integrated circuit, and is configured to transition the capacitance detector to an activated state in response to an increment in the capacitance detected by the capacitance detector reaching or exceeding a first predetermined value a predetermined number of times or more within a predetermined period in a case in which the capacitance detector is in a standby state and no contact with the living body is detected.

Abstract: A positioning device for determining a position of a mobile communication device includes a processor that corrects a clock of at least one of a first wireless communication device or a second wireless communication device that is disposed at a first distance from the first wireless communication device, based on a difference between the first distance and a second distance between the first wireless communication device and the second wireless communication device. The second distance is determined based on a first phase of a first signal transmitted at a first frequency from the first wireless communication device and is received by the second wireless communication device, a second phase of a second signal that is transmitted at a second frequency from the first wireless communication device and is received by the second wireless communication device, and the first distance.

Abstract: A wireless device includes a transmitter; a receiver; and a control device configured to obtain a first difference of a predetermined physical quantity, in a unit time, of a predetermined-frequency signal transmitted by the transmitter to another device, and calculate a second difference of the predetermined physical quantity, in the unit time, of the predetermined-frequency signal received by the another device, based on a signal received by the receiver; and perform a determination process of comparing the first difference and the second difference to determine legitimacy of the signal received by the receiver.

Abstract: A positioning system includes an elevation angle calculator that determines, as a second elevation angle, an inverse cosine of a first value, upon occurrence of a condition in which an absolute value of a first elevation angle is greater than or equal to a second predetermined angle, the second predetermined angle being greater than a first predetermined angle, the first value being obtained by dividing a second value that is obtained by correcting, with a correction value, an altitude measured by an altitude measurement unit, by a distance measured by a distance measurement unit. The elevation angle calculator selects any one of the first elevation angle and the second elevation angle, based on a value of the first elevation angle.

Abstract: A positioning system includes: a transmitting and receiving part having multiple antennas and positioned overhead in a positioning target area with a side entrance; a distance calculation part configured to calculate a distance between a communication device that can move in the positioning target area, and the transmitting and receiving part, based on results gained from signals of multiple frequencies transmitted bidirectionally between the communication device and the transmitting and receiving part; an angle calculation part configured to calculate an angle that indicates a position of the communication device with respect to the transmitting and receiving part, based on a phase difference between the signals received by the antennas of the transmitting and receiving part; and a determining part configured to determine whether or not the communication device is approaching the side entrance based on the distance and angle calculated by the distance calculation part and the angle calculation part.

Abstract: In order to provide a receiver capable of accurately determining a phase difference of I/Q signals, a receiver includes a section detector configured to detect a section between a rising and a falling of a phase based on the rising and the falling of the phase represented by I/Q signals generated based on an advertisement packet transmitted from a transmitter, and a section setting unit configured to identify, within the section between the rising and the falling of the phase, a period in which a first variation amount of the phase is equal to or less than a first predetermined amount, and use the identified period as a section for detecting the phase of the I/Q signals. The section detector detects the rising when a first phase is smaller than a last phase among a plurality of phases acquired by sampling the phases.

Abstract: A positioning system includes an elevation angle calculator that determines, as a second elevation angle, an inverse cosine of a first value, upon occurrence of a condition in which an absolute value of a first elevation angle is greater than or equal to a second predetermined angle, the second predetermined angle being greater than a first predetermined angle, the first value being obtained by dividing a second value that is obtained by correcting, with a correction value, an altitude measured by an altitude measurement unit, by a distance measured by a distance measurement unit. The elevation angle calculator selects any one of the first elevation angle and the second elevation angle, based on a value of the first elevation angle.

Abstract: A door handle including a capacitance sensor configured to detect an operation body is provided. The capacitance sensor includes a substrate formed of an insulator and having a surface, at least one first sensor electrode disposed on the surface of the substrate, a plurality of second sensor electrodes disposed on the surface of the substrate, and a controller. The number of the plurality of second sensor electrodes is greater than the number of the at least one first sensor electrode. The controller applies a voltage to the plurality of second sensor electrodes and detects a coordinate position of the operation body, in a case where a capacitance between the operation body and the at least one first sensor electrode is greater than or equal to a predetermined value.

Abstract: A remote communication system includes a portable device; and a fixed system. The fixed system includes main communication modules; and a position estimating unit configured to estimate a position of the portable device, based on an incident angle of a signal from the portable device, upon detecting the signal by antennas provided in the main communication modules. When there are two main communication modules for which the incident angle is known, the position of the portable device is estimated based on the incident angle. When there is one main communication module for which the incident angle is known, the position of the portable device is estimated based on the incident angle and a received radio wave intensity of the signal. When there is no main communication module for which the incident angle is known, the position of the portable device is estimated based on the received radio wave intensity.

Abstract: An operation detection device includes an electrostatic sensor accommodated inside a casing and including a first conductor and a second conductor, and a controller electrically connected to the first conductor and the second conductor, and applies a voltage to each of the first conductor and the second conductor, to measure an electrostatic capacitance of each of the first conductor and the second conductor. The first conductor is arranged in and the second conductor is not arranged in a detection region in which an operating body is detected by the electrostatic sensor. The first conductor and the second conductor are arranged in a non-detection region in which the operating body is not detected.

Abstract: An angle measuring device includes an antenna device having antenna elements equally spaced along a first axis and a second axis, respectively, a selecting unit that selects phase differences with which a variance thereof becomes a predetermined value or less, from a plurality of phase differences of signals received from a transmission device by the antenna elements, an azimuth angle computing unit that computes an azimuth angle of the transmission device from a ratio of a first phase difference between signals received by two antenna elements spaced by a predetermined distance along the first axis and a second phase difference between signals received by two antenna elements space by the predetermined distance along the second axis, and an elevation angle computing unit that computes an elevation angle of the transmission device, based on the computed azimuth angle and the first or second phase difference.

Abstract: An operation input device includes a resistance element to generate a capacitance between an operating medium and the resistance element in response to an approach of the operating medium to the resistance element, and a power source to supply electric charge to one end and the other end of the resistance element. A first electric unit measures a first electric charge transfer amount supplied to the one end of the resistance element in response to generation of the capacitance. A second unit measures a second electric charge transfer amount supplied to the other end of the resistance element in response to generation of the capacitance. A controller is connected to the first and second units, and detects a position of the operating medium in a direction perpendicular to a surface of the resistance element based on a sum of the first and second electric charge transfer amounts.

Abstract: In order to provide a receiver capable of accurately determining a phase difference of I/Q signals, a receiver includes a section detector configured to detect a section between a rising and a falling of a phase based on the rising and the falling of the phase represented by I/Q signals generated based on an advertisement packet transmitted from a transmitter, and a section setting unit configured to identify, within the section between the rising and the falling of the phase, a period in which a first variation amount of the phase is equal to or less than a first predetermined amount, and use the identified period as a section for detecting the phase of the I/Q signals. The section detector detects the rising when a first phase is smaller than a last phase among a plurality of phases acquired by sampling the phases.

Abstract: A door handle includes door handle case, a first detection electrode and a second detection electrode disposed in the door handle case, and a controller connected to the first detection electrode and the second detection electrode. The controller separately measures a first capacitance between the first detection electrode and an operation body and a second capacitance between the second detection electrode and the operation body, and the controller determines whether a locking operation is performed by the operation body based on one or both of the first capacitance and the second capacitance.

Abstract: An operation device includes a housing, an operation member, and a detector. The housing includes an electrically conductive portion on a surface thereof. The operation member is supported by the housing such that the operation member is movable in response to an operation by an operation body, and is configured to be capacitively coupled to the operation body and to the electrically conductive portion. The detector is configured to detect whether the operation body is in proximity to the operation member based on a change in capacitance at the electrically conductive portion.