Abstract: Provided is a stepping motor abnormality detecting device capable of detecting an abnormality of a stepping motor. Stepping motor abnormality detecting device (100) includes power supply (1), stepping motor (4), stepping motor driver (3), determiner (5), and controller (6). Controller (6) causes stepping motor driver (3) to operate stepping motor (4), current level detector (2) to acquire a current level while stepping motor (4) is driven, and determiner (5) to detect the abnormality of stepping motor (4) by comparing the current level acquired with a predetermined threshold.

Abstract: In a radio communication system of the present invention, a radio master terminal and a radio relay terminal are configured to transmit beacon signals each containing relay stage number information which is information indicating the number of radio relay terminals via which communication with the radio master terminal is performed, and the radio terminal which newly participates in the radio communication system includes: a reception level measuring section for measuring reception levels of received beacon signals; a relay stage number analyzing section for obtaining relay stage number information from each of the received beacon signals; and an upper radio terminal deciding section for deciding as a connection target a radio terminal which is a transmission source of the beacon signal in which the measured reception level is determined as equal to or higher than a specified value, and the relay stage number is smallest based on the obtained relay stage number information.

Abstract: In a radio communication system of the present invention, a second radio relay terminal (221) can receive terminal calling data from a radio adapter terminal (301) in a lower layer of the just second radio relay terminal (221), after it transmits a beacon signal to the radio adapter terminal (301). The second radio relay terminal (221) can receive a beacon signal from a first radio relay terminal (211) soon after it receives the terminal calling data, and transmit the terminal calling data to the first radio relay terminal (211) just after it receives the beacon signal. Thus, it becomes possible to suppress a significant delay in relay transmission of the terminal calling data, and implement quick radio communication.

Abstract: There is provided a wireless communication apparatus for conducting communication between a high-order apparatus and a low-order apparatus, including a beacon reception unit and a beacon transmission unit. The beacon reception unit receives a first regular beacon signal (351) transmitted from the high-order apparatus. The beacon transmission unit transmits a second regular beacon signal (351) synchronizing a clock of the low-order apparatus to the low-order apparatus in a case where the beacon reception unit receives the first regular beacon signal (351). The beacon transmission unit transmits a temporary beacon signal (352) indicating that the clock of a local station is not able to be synchronized with a clock of the high-order apparatus, to the low-order apparatus, in a case where the beacon reception unit is not able to receive the first regular beacon signal (351).

Abstract: In a radio communication device used in a radio communication system of the present invention, a radio relay terminal (201) includes a timing information analyzing section (26) which analyzes intermittent reception timing information contained in a radio signal and relay-transmits the radio signal according to intermittent awaiting of reception of a radio adapter terminal (301), and the radio adapter terminal (301) includes a timing information transmission section (24) which creates timing (intermittent reception timing information) which identifies an intermittent reception timing at which the radio adapter terminal (301) intermittently awaits reception, and transmits the radio signal to the radio access point terminal (101) via the radio relay terminal (201).

Abstract: A wireless communication device for communicating with at least a lower-level device, the communication device comprising a beacon signal generator for generating beacon signals used for synchronizing a clock of the lower-level device, and a beacon transmitter for transmitting the beacon signals generated by the beacon signal generator to the lower-level device at regular time intervals. The beacon signal generated by the beacon signal generator include a beacon identification code, the beacon identification code is shorter in code length than a communication identification code of the own device, and at least a part of the beacon identification code includes a code generated arbitrarily by the beacon signal generator.

Abstract: In a conventional configuration, it is necessary to install all radio terminals and search a route based on a fixed condition, which makes it difficult to provide a balance between an enlarged communication area and economic efficiency of a system. In a meter interface (150), a demodulator unit (156) demodulates installation information transmitted from a concentrator (100) on a regular basis, a connected target determiner unit (158) searches an upper terminal to be connected based on a threshold pre-stored in a memory unit (157), and control is executed such that when the obtained electric field intensity level is higher than a threshold, a concentrator connected with meter interfaces of a smallest number is connected to the meter interface, while when the obtained electric field intensity level is lower than the threshold, a concentrator having a highest electric field intensity level is connected to the meter interface.

Abstract: A meter interface which is an exemplary communication device includes a radio communication unit, a level calculator unit, and an interface processing unit, and the processing unit is configured to obtain information relating to the number of lower terminals connected to each of the upper terminals, based on the signal from the upper terminal, and determine as an upper terminal to be connected to the meter interface, an upper terminal which is smallest in the number of lower terminals connected to the meter interface, from among upper terminals in which received signal levels calculated in the level calculator unit are not lower than a predetermined threshold.

Abstract: A relay device for relaying communication information communicated between an access point and an adapter, said relay device comprises a reception means for receiving the communication information transmitted to said relay device itself; a memory means having one or more memory areas, the memory means being configured to store ID of each communication device which is a next transmission destination, in each of the memory areas; a reading means for reading route information from the communication information, said route information including information specifying the memory area containing the ID of the communication device which is the next transmission destination and indicating a route constituted by communication devices provided in a range from at least said relay device itself to a final transmission destination; a transmission destination identifying means for identifying the ID of the communication device which is the next transmission destination, based on the memory area stored in the memory means a

Abstract: In a wireless device monitoring system including a mobile telephone and an authentication apparatus, a controller of the authentication apparatus repeatedly executes a distance detection processing based on a received level of a received wireless signal and an authentication processing based on authentication data included in the received wireless signal continuously at a first communication interval T1 and a second communication interval T2, respectively, and outputs an alarm signal or executes a predetermined control processing when a true counterpart electronic apparatus is not present or when the true counterpart electronic apparatus is apart from the electronic apparatus by a distance longer than the predetermined threshold distance. When a first communication time T11 for the distance detection processing is shorter than a second communication time T12 for the authentication processing, the T1 and the T2 are set to satisfy T1<T2.

Abstract: A radio communication system of the present invention comprises a radio communication device which transmits or receives a first beacon signal and a second beacon signal. A beacon transmission radio communication device transmits the first beacon signal in a preset timing pattern P1, while a beacon signal reception radio communication device receives the first beacon signal in a preset timing pattern P2. The beacon transmission radio communication device transmits the second beacon signal upon a passage of a delay time period R which is shorter than a standby time period Q which is shorter than the timing pattern P1, after the standby time period Q has passed. The beacon signal reception radio communication device attempts to receive the second beacon signal according to a passage of the delay time period R which is shorter than the standby time period Q which is shorter than the timing pattern P2, after the standby time period Q has passed.

Abstract: In a wireless device monitoring system including a mobile telephone and an authentication apparatus, a controller of the authentication apparatus repeatedly executes a distance detection processing based on a received level of a received wireless signal and an authentication processing based on authentication data included in the received wireless signal continuously at a first communication interval T1 and a second communication interval T2, respectively, and outputs an alarm signal or executes a predetermined control processing when a true counterpart electronic apparatus is not present or when the true counterpart electronic apparatus is apart from the electronic apparatus by a distance longer than the predetermined threshold distance. When a first communication time T11 for the distance detection processing is shorter than a second communication time T12 for the authentication processing, the T1 and the T2 are set to satisfy T1<T2.

Abstract: An antenna apparatus includes a minute loop antenna and at least one antenna element. The minute loop antenna is provided to be electromagnetically close to a dielectric substrate including a grounding conductor, has a predetermined number N of turns and a predetermined minute length, operates as a magnetic ideal dipole when a predetermined metal plate is located closely to the antenna apparatus, and operates as a current antenna when the metal plate is located apart from the antenna apparatus. The antenna element is connected to the minute loop antenna, and operates as a current antenna. In the antenna apparatus, one end of the antenna apparatus is connected to a feeding point, and another end of the antenna apparatus is connected to the grounding conductor of the dielectric substrate.

Abstract: An antenna apparatus includes a minute loop antenna and at least one antenna element. The minute loop antenna is provided to be electromagnetically close to a dielectric substrate including a grounding conductor, has a predetermined number N of turns and a predetermined minute length, operates as a magnetic ideal dipole when a predetermined metal plate is located closely to the antenna apparatus, and operates as a current antenna when the metal plate is located apart from the antenna apparatus. The antenna element is connected to the minute loop antenna, and operates as a current antenna. In the antenna apparatus, one end of the antenna apparatus is connected to a feeding point, and another end of the antenna apparatus is connected to the grounding conductor of the dielectric substrate.

Abstract: In the receiver using a PLL synthesizer, there is a limit in reducing boot-up time or frequency switching time, which shortens battery life. A first local frequency L01 from a multiplier 22 and a receiving signal are input to a first frequency converter 10 to convert it to a first intermediate frequency IF1. The first intermediate frequency IF1 is converted in a second frequency converter 12 by a frequency L02 of an N1 frequency divider 24 to a second intermediate frequency IF2. Also, the outputs of the N1 frequency divider 24 and N2 frequency divider 26 are mixed in the frequency converter for transmission 34, and L04 and the local frequency L01 are added to a lower-side-band cancel mixer 50 to extract the upper side band of the transmission frequency.

Abstract: An air bag apparatus is provided which stably projects the air bag towards the front of a passenger. A retainer 12 stores therein an inflator 14 for injecting gas from gas injection holes at one end of the inflator, and an air bag 15 which is folded. A mid-retainer 16 is provided between inflator 14 and air bag 15. Mid-retainer 16 is provided with a plurality of guide fins 61, which are formed by making cuts in the mid-retainer and bending the cut portions. The direction of gas flow is adjusted by the inclination of each guide fin 61. The gas discharge rate is adjusted by setting various distances between each two adjacent guide fins 61 as to be greatest at the central part of the mid-retainer and either side of the center portion having a gas discharge rate approximately equal to its corresponding opposite side, thereby ensuring air bag 15 will be projected stably.

Abstract: An airbag restraint unit for a front seat passenger aside a driver in an automotive vehicle comprises a casing having upper and lower chambers. An inflator for ejecting gas is disposed in the lower chamber of the casing. An airbag is disposed in the upper chamber of the casing to inflate and deploy upon being supplied with gas from the inflator. A mid-retainer is disposed in the casing and located between the inflator and the airbag. The casing includes a first engagement section having opposite first and second engagement surfaces inclined to gradually approach in a direction toward the airbag. First and second installation holes are formed respectively at the first and second engagement surfaces of the casing. The mid-retainer includes a second engagement section having opposite first and second engagement surfaces engaged respectively with the first and second engagement surfaces of the first engagement section of the casing.

Abstract: An abnormality detecting apparatus constantly monitors even a slight amount of gas which has leaked by checking a gas supply pipe when it is determined that the pressure regulating function of a pressure regulator is abnormal. The abnormality detecting apparatus detects an abnormality of the regulated pressure of a pressure regulator appropriately by comparing the regulated pressure with a predetermined low value of a pressure regulating range when the gas flow rate is high and with a predetermined high value of a pressure regulating range when the gas flow rate is low.

Abstract: In a radio receiver apparatus of an orthogonal detection type, a voltage controlled first local oscillator generates a first local oscillation signal, and mixers mix an inputted reception signal with the first local oscillation signal and a 90.degree. shifted signal thereof, respectively, the mixed signals respectively being passed through first and second band-pass filters to obtain desired first intermediate frequency signals. Further, a second local oscillator generates a second local oscillation signal. Further mixers mixes the first intermediate frequency signals from the first and second band-pass filters with the second local oscillation signal and a 90.degree. shifted signal thereof, respectively. Then there is calculated either one of a sum of and a difference between the resulting mixed signals, the calculated signal being passed through a third band-pass filter to obtain a second intermediate frequency signal to be demodulated.

Abstract: A flow amount measuring and controlling apparatus which has a built-in gas meter can compute and control the flow amount used for each gas appliance by the estimation of the gas appliance generated in the flow variation from the change of the monetary flow amount passing through the gas meter, whereby, since the condition of the gas appliance can be correctly determined, the abnormal operation of the gas appliance can be detected so as to shut off the gas.