Copyright © Philip M. Parker, INSEAD. Terms of Use.
| Year | Description |
| 1999 | Invention patented by Jun Oouchi on August 22th, 1999. Abstract: A DSRC car-mounted equipment which prevents an IC card from being inserted when the temperature lies outside a tolerable temperature range, in order to avoid the thermal deformation and low-temperature breakage of the IC card. The DSRC car-mounted equipment comprises a communication control unit for executing a dedicated narrow-range communication with an on-the-road equipment 1, an IC card accommodation portion 9, a contact portion 10 connected to an electrode portion D of the IC card, a car-mounted equipment controller for reading and writing data to, and from, the IC card, a circuit board 8 constituting the IC card accommodation portion, temperature sensors 11 and 12 disposed near the IC card accommodation portion, a temperature-judging unit for judging whether the temperature data are within the temperature range tolerated by the IC card, and alarm unit 6 and 7 for producing an alarm when the temperature data lie outside the tolerable temperature range. |
| 2000 | Invention patented by Takayuki Sugano on July 10th, 2000. Abstract: A DSRC car-mounted equipment which prevents, in advance, inconvenience caused by disorder in the antenna unit of the car-mounted equipment. A DSRC car-mounted equipment comprises a main body 1 of a car-mounted equipment having a control unit 10 and an antenna unit 12 for executing radio communication with an on-the-road equipment, information output means 13, 14 connected to the control unit, a checking unit 2 having a checking circuit unit 20 and a checking antenna unit 21 for executing radio communication with the antenna unit of the car-mounted equipment, and an antenna-judging means for judging the communication ability of the antenna unit of the car-mounted equipment based on the communication state of check signal waves D between the antenna unit 12 of the car-mounted equipment and the checking antenna unit 21, wherein the antenna-judging means produces an alarm signal when the communication ability of the antenna unit 12 of the car-mounted equipment is smaller than a predetermined value, and the control unit 10 of the car-mounted equipment drives the information output means 13, 14 in response to the alarm signal to produce an alarm. |
| 2000 | Invention patented by Mamoru Takikita on August 8th, 2000. Abstract: A DSRC car-mounted equipment reliably preventing communication error in the communication area, comprising a communication control unit 11 for transmitting and receiving data by radio to and from an on-the-road equipment, a radio detector unit 12 for detecting signals received from the on-the-road equipment by detecting the electric field intensity E, and a microcomputer (10A) for fetching output signals from the radio detector unit by controlling the communication control unit to process data included in the received signals, wherein the microcomputer includes an input interface for receiving data Vr related to the speed of the vehicle, and communication area-setting means for variably setting the radio communication area depending upon the vehicle speed data, and wherein the communication area-setting means contracts the communication area when the vehicle speed data represents a low-speed state and expands the communication area when the vehicle speed data represents a high-speed state. |
| 2000 | Invention patented by Jun Oouchi on August 16th, 2000. Abstract: A DSRC car-mounted equipment which self-diagnoses its communication function and informs the driver of the result, comprising a first local oscillator 30 for generating a car-mounted equipment frequency fosc, a demodulator 16 for detecting the electric field intensity HE and for picking up reception data D1, a car-mounted controller 40 for fetching the reception data by changing over the transmission/reception change-over switch SW1 and for sending transmission data D2, a second local oscillator 31 that outputs a frequency for detecting abnormal condition corresponding to an on-the-road equipment frequency fs, and means for judging the condition of the transmission/reception circuit using the frequency for judging abnormal condition, wherein the transmission/reception change-over switch is connected to the reception circuit, abnormal condition is judged from at least either the electric field intensity or the reception data detected based on a leakage power of the frequency for detecting abnormal condition, and information output means 50 is driven. |
| Source: selected by the editor from original sources. | |
Copyright © Philip M. Parker, INSEAD. Terms of Use.
