摘要:
An engine of a vehicle is to be started by only a simple operation. For example, when judging that the shift position is moved from “P” to another position, ECU transmits “request” for certifying a portable electronic key in the form of LF. When receiving UHF as “answer”, ECU outputs an engine start permitting signal. Accordingly, the engine start processing is finished, and the engine of the vehicle is started in response to output of the engine start permitting signal. The present invention is applicable to an antitheft system of a vehicle.
摘要:
A start of a vehicle is made to be capable of limited in compliance with a necessity. For example, in a case where an operation mode at a time point in which a “request” from an ECU was received is a start inhibition mode, a portable electronic key forms an “answer” including a “start inhibition information”, and transmits that “answer” to the ECU by a UHF. In this case, in an ECU side, the start of the vehicle is inhibited. In contrast to this, in a case where it is a start permission mode, an “answer” not including the “start inhibition information” is formed and transmitted to the ECU. In this case, in the ECU side, the start of the vehicle is permitted. That is, by the fact that an accelerator is stepped on and the like, the vehicle starts. The present invention can be applied to a passive entry system.
摘要:
A transmission controller 7B is configured to transmit an R/W request signal for requesting transmission of a tag response signal to a RFID tag 1 twice. At this time, a frequency controller 7A controls a PLL section 5A to transmit the R/W request signal via different carrier frequencies. A phase information acquirer 8A detects a phase change amount of the tag response signal that is transmitted via different carrier frequencies. A distance calculator 8B calculates the distance between the reader/writer 2 and the RFID tag 1 on the basis of the phase change amount.
摘要:
An antenna for an RFID tag includes each power feeding parts 11 that is formed of a conductor, meandering parts 13a and 13b that are formed of conductors shaped as a pair of meandering lines, connected to the power feeding parts 11, and extend from the power feeding parts 11 toward both ends of the power feeding parts 11, respectively, a pair of radiating parts 14a and 14b that are formed of conductors and connected to outer ends of the pair of meandering parts 13a and 13b, respectively. The meandering parts 13a and 13b include a plurality of sides arranged in a longitudinal direction where the meandering parts 13a and 13b extend. Further, the lengths of portions, where the ends of the radiating parts 14a and 14b facing the meandering parts 13a and 13b face the sides closest to the radiating parts 14a and 14b among the plurality of sides of the meandering parts 13a and 13b in a direction orthogonal to the longitudinal direction, are smaller than the widths of the widest portions of the radiating parts.
摘要:
This invention provides a wide band IC tag in which the vicinity of an IC portion arranged in a tag main body can be arranged in a portion difficult to be influenced by an object. Therefore, this invention is characterized in the wide band IC tag for connecting the IC portion arranged in the tag main body and an antenna portion, wherein the IC portion is arranged at an end of the tag main body.
摘要:
An antenna for an RFID tag includes each power feeding parts 11 that is formed of a conductor, meandering parts 13a and 13b that are formed of conductors shaped as a pair of meandering lines, connected to the power feeding parts 11, and extend from the power feeding parts 11 toward both ends of the power feeding parts 11, respectively, a pair of radiating parts 14a and 14b that are formed of conductors and connected to outer ends of the pair of meandering parts 13a and 13b, respectively. The meandering parts 13a and 13b include a plurality of sides arranged in a longitudinal direction where the meandering parts 13a and 13b extend. Further, the lengths of portions, where the ends of the radiating parts 14a and 14b facing the meandering parts 13a and 13b face the sides closest to the radiating parts 14a and 14b among the plurality of sides of the meandering parts 13a and 13b in a direction orthogonal to the longitudinal direction, are smaller than the widths of the widest portions of the radiating parts.
摘要:
This invention provides a wide band IC tag having a wide frequency band and difficult to be influenced an object having a dielectric constant. Therefore, the wide band IC tag is formed by connecting an IC portion arranged in a tag main body and left and right antenna portions. The left and right antenna portions are constructed by respective plural antenna elements of different element lengths.
摘要:
A transmission controller 7B is configured to transmit an R/W request signal for requesting transmission of a tag response signal to a RFID tag 1 twice. At this time, a frequency controller 7A controls a PLL section 5A to transmit the R/W request signal via different carrier frequencies. A phase information acquirer 8A detects a phase change amount of the tag response signal that is transmitted via different carrier frequencies. A distance calculator 8B calculates the distance between the reader/writer 2 and the RFID tag 1 on the basis of the phase change amount.
摘要:
A transmission controller 7B is configured to transmit an R/W request signal for requesting transmission of a tag response signal to a RFID tag 1 twice. At this time, a frequency controller 7A controls a PLL section 5A to transmit the R/W request signal via different carrier frequencies. A phase information acquirer 8A detects a phase change amount of the tag response signal that is transmitted via different carrier frequencies. A distance calculator 8B calculates the distance between the reader/writer 2 and the RFID tag 1 on the basis of the phase change amount.
摘要:
A transmission controller 7B is configured to transmit an R/W request signal for requesting transmission of a tag response signal to a RFID tag 1 twice. At this time, a frequency controller 7A controls a PLL section 5A to transmit the R/W request signal via different carrier frequencies. A phase information acquirer 8A detects a phase change amount of the tag response signal that is transmitted via different carrier frequencies. A distance calculator 8B calculates the distance between the reader/writer 2 and the RFID tag 1 on the basis of the phase change amount.