Abstract:
In a passive entry comprising a car-mounted transmitter-receiver and one or more portable transmitter-receivers, the car-mounted transmitter-receiver generates a request signal, when any of the portable transmitter-receivers receives the request signal, an answer signal is transmitted in response to the request signal, and when the car-mounted transmitter-receiver receives the answer signal, the car door is locked or unlocked. The car-mounted transmitter-receiver has a timer for counting time from transmission of the request signal to reception of the answer signal, and when the answer signal is received, recognizes the answer signal as legal only when an elapsed-time value counted by the timer is within a valid elapsed-time value set in advance, and exercises control of a controlled apparatus, such as, e.g., locking and unlocking of the car door.
Abstract:
In an amplifying circuit for a transmitter including a first switching device having one end thereof connected to a power supply, a second switching device having one end thereof connected to another end of the first switching device and another end thereof grounded and an antenna connected to a junction point of the first switching device and the second switching device, wherein the first switching device and the second switching device 12 are alternately driven by a driver, the driver and a control electrode of the first switching device as well as the driver and a control electrode of the second switching device are connected through a common mode filter.
Abstract:
A receiving antenna is formed by disposing two ferrite chip antenna elements adjacently to each other. The two ferrite chip antenna elements are disposed in combination so that a magnetic flux passing through the central axis of one of the ferrite chip antenna elements does not pass through that of the other of the ferrite chip antenna elements. Herein, the two ferrite chip antenna elements are disposed in combination so as to intersect each other substantially at right angles in a state in which one end portion of one of the ferrite chip antenna elements is opposed to a side surface portion of the other of the ferrite chip antenna elements.
Abstract:
A vehicle-mounted input unit capable of enabling the manual manipulator to give its operator a feel of resistance varying with what is done by operating the manipulator and thereby affording excellent operating convenience is to be provided. In a memory unit provided in a control section are stored tables showing correlations between the operating directions and quantity of a manual manipulator and an external force applied to the manual manipulator from actuators. The control section determines the direction and magnitude of the external force to be applied to the manual manipulator from positional information supplied from position sensors and the tables and drives the actuators via an actuator driver. The external force to be applied to the manual manipulator can be regulated either according to the movable range of a vehicle-mounted electric device from its current position to an end of its possible motion or according to the magnitude of the working force applied to the manual manipulator.
Abstract:
A solution is to provide a tire air pressure monitor comprising: tire air pressure sensors and transmitters which are respectively annexed to tires; two receiving antennas which receive a transmitting signal from each of the transmitters; phase shifters which shift signal phases received from the receiving antennas respectively by control voltages; a synthesizer which synthesizes outputs from the phase shifters; and a meter which detects an output level from the synthesizer, wherein, the two receiving antennas are arranged so that receiving phase differences between the receiving antennas as to the transmitting signal from each of the transmitters are made different, the control voltages for the phase shifters are respectively obtained in advance, which maximize the output level from the synthesizer, as to respective tire mounting positions, and stores an association table relating each of the tire mounting positions to the control voltages, and the control voltages are controlled so that the output level from the synthesizer is maximized with respect to a transmitting signal from any one of the tire mounting positions, and each of the tire mounting positions is identified by comparing values of the control voltages thus controlled with the association table.
Abstract:
A receiving antenna for receiving low frequency signals is constituted by arranging two loop antenna elements and one air-core loop antenna element close to each other, wherein the two loop antenna elements are arranged in combination such that a magnetic flux which passes an axis of each one loop antenna element is prevented from passing an axis of another loop antenna element, and one air-core loop antenna element is arranged in combination with the two loop antenna elements such that an axis of the air-core loop antenna crosses respective axes of the one and other loop antenna elements orthogonally.
Abstract:
The present invention provides an input device allowing automatic customization of selection of function switches and functions assigned to the operating direction of a manual operating pad in a manner most suitable to the habit and subjective bias of operators to prevent any mistakes. The input device includes a mistake counter means, which increments the counted number of mistakes by determining, when any part of an input unit is operated within a predetermined period of time after another part of the input unit has been operated, that the preceding operation is a mistake; and a controller unit will replace the function assigned to the preceding operating action with another function in a function table, when the counted number of times of mistakes reaches a predetermined number.