Nec Corporation

Subaru Corporation

Nippon Electric Co., Ltd.

Asahi Kasei Fibers Corporation

W.l. Gore & Associates, Co., Ltd.

Asamasu Co., Ltd.

Nikon Corporation

Yutaka Sasaki

Ichiro Sase

Kumiko Kindaichi

Toshiyuki Narahashi

Akihiro Yamane

Yoichi Onomura

Akitoshi Sakaguchi

Daisuke Hirabayashi

Yoshiharu Tamura

Toshiya Okabe

Keisuke Tajiri

Yoichi Iki

Ryosuke Komatsu

Miroslav Svoboda

Isao Kimura

Yusuke Yahara

Mikes Josef

Svoboda Miroslav

Sedlak Roman

Martin Sajdl

Jiri Sonsky

Yukimasa Kuroda

Yoshihiro Takagi

A roadable vehicle includes main wings, a fuselage, a sliding door on a lateral side surface of the fuselage, and hinge mechanisms. The hinge mechanisms connect the main wings to the fuselage. The hinge mechanisms allow the main wings to turn between a first state where the main wings are folded beside the fuselage and a second state where the main wings are opened on the lateral sides of the fuselage. In the first state, the sliding door is opened and closed by sliding the sliding door in a space formed between one of the main wings and the fuselage while an outer side of the fuselage and an inner side of the sliding door facing each other.

Roadable aircraft

A deceiving signal detection system includes a first antenna, a second antenna, and a signal processor. The first antenna is configured to receive at least four radio wave signals. The signal processor determines that the radio wave signals are the deceiving signals by determining that a relative positional relation between the first antenna and the second antenna calculated on a basis of the radio wave signals deviates from an actual relative positional relation between the first antenna and the second antenna by more than a predetermined amount, and also determines whether an orientation of the aircraft determined based on positions of the first antenna and the second antenna matches an orientation of the aircraft calculated based on an inertial navigation system.

Deceiving signal detection system and deceiving signal detection method

An aircraft position measurement system is provided for an aircraft configured to use an artificial satellite configured to fly in a known orbit. The aircraft position measurement system includes a reflector, a distance-angle measuring member, a satellite position obtainer, and an aircraft position calculator. The reflector configured to be mounted on the artificial satellite and reflect an electromagnetic wave in a direction in which the electromagnetic wave arrives. The distance-angle measuring member is configured to be mounted on the aircraft and emit an electromagnetic wave and measure a bearing and a distance to the artificial satellite when seen from the aircraft. The satellite position obtainer is configured to obtain an absolute position of the artificial satellite. The aircraft position calculator is configured to calculate a position of the aircraft based on the absolute position of the artificial satellite and the bearing and the distance to the artificial satellite.

Aircraft position measurement system, aircraft position measurement method, and aircraft

A navigation system includes a receiver and a signal processor. The receiver is mounted on a second aircraft. The second aircraft is an acquisition target of location information. The receiver is configured to receive a navigation signal from each of three or more first aircrafts. The navigation signal includes the location information on a location of the corresponding first aircraft. The navigation signal is transmitted as a radio signal from a navigation apparatus mounted on each of the three or more first aircrafts. The signal processor is mounted on the second aircraft. The signal processor is configured to calculate a location of the second aircraft on the basis of the navigation signal.

Navigation system, navigation method, and aircraft

There is provided a navigation system, comprising: a buoy on a water surface movably anchored to a bottom; a plurality of at least three transmitters fixed to the bottom or at different positions in the water for transmitting signals to specify the positions; a receiver, being disposed with the buoy, configured to receive signals transmitted by the plurality of transmitters; a signal processor, being disposed with the buoy, configured to specify the position of the buoy, based on the signals received by the receiver, and generate a navigation signal indicating the position of the buoy, and a radio, being disposed with the buoy, configured to transmit the navigation signal generated in the signal processor wirelessly, the navigation signal being receivable by a radio in a mobile body.

Navigation system and navigation method

The present invention provides a filter cloth for a dust collector which shows low pressure loss, no clogging, superior dust shaking-off performance, and durability for continuous use without impairing collection performance, even under such dust collection conditions as high speed filtration and high dust concentration. The filter cloth for a dust collector relevant to the present invention is a filter cloth which is made by laminating and integrating a filtration layer of a nonwoven fabric layer consisting of a thermoplastic fiber and a support layer consisting of a woven fabric layer, characterized in that at least filtration surface layer of said laminated and integrated filter cloth has a concave-convex shape having a height from hill part to trough part of 1.6 to 20.0 mm.

Filter cloth for dust collector

It is an object to provide a vent filer that can reduce contaminants diffusing through the vent filter into the inside of a housing, and has high diffusion efficiency and low pressure loss. The vent filter has an adhesive layerhaving a through-holeat least in one area; a flow path memberprovided with a flow pathin communication with the through-hole; and an air-permeable membranecovering the flow path memberand part of the adhesive layer, wherein the peripheral portionof the air-permeable membraneis fixed to the adhesive layerand the flow path memberis held within a hollow portion formed between the adhesive layerand the air-permeable membrane

Vent filter and electric device using the same

A cordless telephone is disclosed that displays the relative position of a communication partner's cordless telephone during conversation between cordless telephones and that includes a received field level detector that measures the received field level; a memory section that inputs and stores the position at which received field level is first detected and positions subsequently detected; a control section that determines the relative position of a communication partner's cordless telephone by performing a three-point measurement based on the results of detecting received field level three times and on the resulting detected positions, and a display section that displays the measurement result.

Mobile telephone system for determining a position of a mobile telephone

In a high frequency amplifying circuit, an impedance matching circuit has an impedance matching inductance, and a switching diode connected in parallel with the inductance. The diode is selectively opened or closed in accordance with the input level, thereby changing an impedance matching condition. When the input level is low, an amplified output is produced by impedance matching which is implemented by the inductance itself. When the input level increases up to a level nearly causing saturation to occur, the diode is opened and rendered conductive with the result that the impedance matching characteristic changes. As a result, a phase characteristic is prevented from being deteriorated by a changed in input level.

Impedance matching circuit

In a radio transmission output control circuit, a modulating circuit modulates signals to be sequentially transmitted in consecutive time slots at predetermined timings. A data generating circuit generates, when one time slot is being transmitted, data meant for another time slot to be transmitted subsequently. The data include output control information for the subsequent time slot, and the deviation of the output level of the subsequent time slot. The data generating circuit outputs the data at a transmission timing assigned to the subsequent time slot. A level control circuit controls the output level of the subsequent time slot on the basis of the data from the data generating circuit. With this configuration, it is possible to execute control over a transmission output signal rapidly.

Radio transmission output control circuit for TDMA communication

A local oscillator system carries out a frequency switching method, in which local signals with fewer spurious components can be obtained. The local oscillator system is provided with frequency generators for generating signals with different frequencies and frequency dividers connected to the frequency generators. The dividers divide the frequency of the signals to output the frequency-divided signals while operating in an active mode and output undivided signals while the dividers are operating in inactive mode. The dividers are controlled so that one of the dividers is in the active mode and the remaining dividers are in the inactive mode. The output signals from the dividers are combined with each other to form a single output signal and then the single output signal is sent to a filter. The filter selects a component having a desired local frequency from the single output signal. Spurious components caused by unselected frequencies are removed by the filter because they are not divided.

Local oscillator system and frequency switching method for minimizing

In a radio communication apparatus which uses a common carrier frequency on transmission and reception operations selectively carried out in the apparatus, a frequency divider is located between a modulator operated by a predetermined modulation frequency and a modulating local oscillator which oscillates a modulating frequency equal to an integral multiple N of the predetermined modulation frequency. The frequency divider has a frequency division factor equal to N and supplies a frequency divided signal of the predetermined modulation frequency to the modulator during the transmission operation under control of a control circuit. During the reception operation, the frequency divider is put into an inactive state by the control circuit to isolate the modulating local oscillator and the modulator.

Radio communication apparatus capable of isolating a receiver from a

A booster and charger unit for a hand-held portable (HHP) telephone capable of preventing a casing of the unit from being heated to an excessive temperature. The casing has thereinside a charging device for charging a battery, which is installed in the telephone, and a temperature sensor responsive to the temperature of the casing. When the temperature of the casing sensed by the sensor rises to a predetermined level, charging by the charging device is interrupted or the charging current thereof is reduced.

Booster and charger unit used for hand-held portable telephone and

An amplifier or oscillator transistor circuit with low power consumption has a first transistor for amplification or oscillation and a biassing circuit for supplying a D.C. biassing voltage to the base of the first transistor. The biassing circuit comprises a voltage dividing resistor having an output terminal for providing a divided D.C. voltage. A second transistor has an emitter follower circuit with a base which is connected to the output terminal. Its emitter is coupled to the base of the first transistor to provide the D.C. biassing voltage. Furthermore, the first transistor means has an inverse conductive junction accompanied to the junction of the second transistor.

Transistor circuit including biassing circuit

An improved bias circuit of the quarter-wavelength microstrip line type for a high-frequency amplifier is provided which is of divided form, including two, open and short stubs the sum of whose lengths in effect amounts to a quarter wavelength. The characteristic impedance of such microstrip line can be effectively increased by properly selecting the ratio of the stub lengths, thus enabling realization of a wider-band high-frequency amplifier circuit with reduced cost.

Growing community of inventors

Tokyo, Japan

Yutaka Sasaki