Nec Corporation

Honda Elesys Co., Ltd.

Renesas Technology Corp.

Other

Daiichi Sankyo Company, Limited

Satoshi Baba

Kazunori Jinno

Mitsuru Hiraki

Takashi Saito

Naoki Saito

Takayasu Ito

Makoto Nagai

Nobuhiro Koyota

Kenichi Fukui

Kazutomo Isonaga

Tsutomu Fukui

Shingo Nagai

Masahiro Ofuji

Hiroshi Oikawa

Yoshinori Masuda

Takashi Inou

Kenji Kumagai

Yoshio Ito

Yoshitaka Oka

Shinya Deguchi

Masahiro Miyamori

Shusuke Hayashida

Shinji Kato

Masashi Tsuda

Rie Ito

A passenger detection system includes a satellite sensor circuit; and a master determination unit. The satellite sensor circuit includes an antenna electrode which is provided in at least one of a seating face or a back face of a seat; and an electric field generation unit which generates an electric field around the antenna electrode, and generates a current signal based on the electric field. The master determination unit includes a current detection unit which detects a variation of the current signal; and a control unit which determines a sitting situation of a passenger by comparing signal data with threshold data, the signal data being related to a current signal which flows based on the electric field which is obtained from the current detection unit and which is generated at the antenna electrode, the threshold data being related to the sitting situation of the passenger. The satellite sensor circuit and the master determination unit are connected via a power supply line and a ground line. The electric field generation unit generates the electric field based on the voltage supplied from the master determination unit to the power supply line, and the electric field generation unit supplies the current signal to the power supply line.

Passenger detection system

In order to set with a high precision the value of rush current flowing in the power switch circuit at the time of turning 'on' the power, the internal circuit Int_Cir of the LSI is supplied with the internal source voltage Vint from the output transistor MPof the regulator VReg of the power switch circuit PSWC. The power switch circuit PSWC includes a control circuit CNTRLR and a start-up circuit STC. During the initial period Tint following the turning 'on' of the power supply, the start-up circuit STC controls the output transistor MPand reduces the primary rush current so that the output current Isup of the output transistor MPmay represent an approximately constant increment as the time passes. The difference &#x394;V between the internal current voltage due to the charge of load capacitance C with the output current Isup controlled by the start-up circuit STC and the current voltage Vint from the regulator VReg is set within the predetermined limit to reduce the secondary rush current.

Semiconductor integrated circuit

In an occupant detecting apparatus for detecting an occupant seated on a passenger seat of a vehicle with an airbag for the occupant, a load sensor is provided in a bottom part of the seat. A plurality of first electric field sensors are provided in the bottom part of the seat, and a plurality of second electric field sensors are provided in a rear part of the seat. An airbag inflating permission control unit permits inflation of the airbag in accordance with output signals of the load sensor and the first and second electric field sensors.

Occupant detecting apparatus capable of improving detection accuracy

A passenger detecting system includes an antenna electrode, a signal generating circuit, a detecting circuit, and a control circuit. The antenna electrode is provided in a seat to be occupied by a passenger. The signal generating circuit generates and supplies a supply signal to the antenna electrode through a resistor such that an electric field is generated around the antenna electrode. The detecting circuit includes the resistor, and detects a direct current data signal from a line voltage associated with a voltage drop across the resistor, wherein the line voltage changes depending upon an object on the seat. The control circuit determines from the detected direct current data signal, whether or not a passenger is present in the seat and whether the passenger is an adult or a child.

Passenger detecting system and air bag apparatus using the same

A passenger detecting system includes a plurality of antenna electrodes provided in a seat, a signal generating section, a detecting section, a switching circuit and a control unit. The signal generating section generates an electrode signal. The switching circuit sequentially supplies the electrode signal to the plurality of antenna electrodes one by one in response to a switching control signal. The detecting section detects change of the electrode signal to generate a detection signal when the electrode signal is supplied to each of the plurality of antenna electrodes. The control unit outputs the switching control signal to the switching circuit and generates a passenger data associated with a passenger on the seat based on the detection signal for each of the plurality of antenna electrodes.

Passenger detecting system and air bag system using the same

There is disclosed a digital modulator whose modulation parameter can be controlled and in which modulation data or modulated signals are prevented from generating interference signals with adjoining circuits through control when power supply is turned on or system is changed. The digital modulator has a device for detecting that the power supply is turned on, and the transmission data is modulated with fixed data in response to an output of the detecting device for a time required for completing a required system constitution setting. The digital modulator also has a device for detecting the presence of the control for changing the system after the power supply is turned on. In response to an output of the detecting device, modulation is performed with the fixed data for a time from the start till the completion of the setting with a predetermined time added thereto.

Digital modulator

An automatic transmit power control (ATPC) method and system for radio equipment of a cross polarization interference canceler system (XPIC system) wherein two orthogonally polarized waves of the same frequency channel are used independently of each other. The transmit powers of the polarized waves of the object frequency channel are simultaneously increased when a drop of the receive signal level of at least one of the two polarized waves of the object frequency channel is detected.

Power control in microwave transmission system increasing power of both

Growing community of inventors

Tokyo, Japan

Satoshi Baba