摘要:
An on-vehicle device includes: a communication unit capable of executing communication using a first communication scheme; a transmitter that transmits a request signal and a measurement signal to a mobile device, using a second communication scheme different from the first communication scheme of the communication unit; and a receiver that receives a response signal from the mobile device that has received the request signal and the measurement signal transmitted from the transmitter. The transmitter changes a number of times of transmission of the measurement signal transmitted subsequently to the request signal based on whether or not the communication of the communication unit is in a connected state.
摘要:
The present invention provides a liquid-crystalline elastomer having large generation force and a large amount of displacement. The liquid-crystalline elastomer according to the present invention is composed of a polymer of liquid-crystalline molecular units and cross-linking reagent units. Each of the cross-linking reagent units contains a bicyclo structure selected from the group consisting of a bicyclo [2,2,1] heptane structure or a bicyclo [2,2,2] octane structure. A molar ratio of the cross-linking reagents to the liquid-crystalline molecular units is not less than 0.1 and not more than 0.2. The bicyclo [2,2,1] heptane structure may be a trycyclodecane structure. The bicyclo [2,2,2] octane structure may be a trycycloundecane structure.
摘要:
An actuator device comprises an actuator wire, a net-shaped heating element which covers a side surface of the actuator wire and comprises heating wires, and a controller for supplying electric power to the net-shaped heating element to heat the net-shaped heating element. The actuator wire is contracted by application of heat and restored by release of the heat. The side surface of the actuator wire is formed of a polymer. One end of the net-shaped heating element is connected to an end of the actuator wire. Another end of the net-shaped heating element is connected to another end of the actuator wire. Each of the heating wires comprises an insulative first elastic yarn and a metal wire. The metal wire are helically wound onto the first elastic yarn. When the net-shaped heating element is not heated, the net-shaped heating element is in contact with the side surface of the actuator wire. When the net-shaped heating element is heated, the net-shaped heating element moves outward from the side surface of the actuator wire due to contraction of the actuator wire.
摘要:
This vehicular near field communication system has a configuration where a portable device receives a first signal and a second signal respectively transmitted from a vehicle-exterior antenna and a vehicle-interior antenna of an on-board instrument mounted in a vehicle, measures a first received signal strength from the first signal, measures a second received signal strength from the second signal, adds an offset to the second received signal strength, and transmits a response signal to the on-board instrument in accordance with the first received signal strength and the second received signal strength added with the offset, so as to be able to prevent a portable device from being locked in a cabin even though the portable device is shielded by a metal in the cabin.
摘要:
An on-vehicle device includes a determination unit, an instruction unit, and a modification unit. The determination unit determines whether to unlock doors based on a rolling code from a portable device and a reference rolling code to be collated with the rolling code. When the determination unit determines to unlock the doors, the instruction unit instructs the portable device to increase a value of the rolling code. When the portable device accepts the instruction from the instruction unit, the modification unit increases a value of the reference rolling code to be used in the determination unit.
摘要:
An LF transmitter of a vehicle-mounted device sends a request signal, and first and second measurement signals to a portable device. The LF transmitter sends to the portable device the second measurement signal with a transmission intensity different from that of the first measurement signal. An UHF receiver of the vehicle-mounted device receives, from the portable device, a response signal containing information on reception intensities of the first and second measurement signals. The vehicle-mounted device authenticates the portable device based on a relation between the information on the reception intensity of the first measurement signal and the information on the reception intensity of the second measurement signal contained in the response signal received by the UHF receiver and a relation between the transmission intensity of the first measurement signal and the transmission intensity of the second measurement signal sent from the LF transmitter.
摘要:
A transmitter of an on-vehicle device transmits a request signal from a first antenna, and transmits first measurement signals at different timings from the first antenna and a second antenna. The receiver receives a first response signal including information on transmission intensities of a second measurement signals to be transmitted from the first and second antennas. The transmitter further transmits the second measurement signals at different timings from the first and second antennas. The second measurement signals have transmission intensities respectively set based on the information on transmission intensities included in the first response signal. The receiver receives a second response signal transmitted when a relationship between the reception intensities of the second measurement signals transmitted from the first and second antennas agrees with the information on the transmission intensities included in the first response signal.
摘要:
An on-vehicle device includes: a transmitter that transmits a request signal and a first measurement signal to a mobile device; and a receiver that receives a first response signal including information related to transmission strength of a second measurement signal from the mobile device that has received the request signal and the first measurement signal transmitted from the transmitter. The transmitter transmits to the mobile device the second measurement signal to which transmission strength has been set based on the information related to the transmission strength included in the first response signal received by the receiver. The receiver receives a second response signal. The second response signal is transmitted by the mobile device based on a result of determining the second measurement signal.
摘要:
This short-distance radio communication system for a vehicle includes an in-vehicle unit having more than one antenna and a portable unit performing radio communications with the in-vehicle unit. The in-vehicle unit transmits a first burst together with a call signal for calling the portable unit through a first antenna, and transmits a second burst subsequent to the first burst through a second antenna. The portable unit receives the signals transmitted from the in-vehicle unit, measures respective received signal strength indicators from the first burst and the second burst contained in the received signals, and responds to the in-vehicle unit according to results of comparing the respective indicators with given thresholds.