Patent ID: 7983293
Filing Date: 2011-07-19
Classification: B60C,G07C

Abstract:
1. An external signal supply unit comprising: a supplying portion that supplies an external signal to an on-vehicle unit mounted in a vehicle through radio communication; an operation control portion that controls an operation state thereof in accordance with at least one on-vehicle unit in a set range that is determined in advance; a transmission command signal transmission portion that transmits a transmission command signal commanding the transmission of identifier information indicating the on-vehicle unit as the external signal; an identifier information reception portion that receives identifier information that has been transmitted from the on-vehicle unit in accordance with the transmission command signal; an identifier information storage portion that stores the identifier information that has been received by the identifier information reception portion; and an annunciation portion that annunciates a reception state of the external signal in the on-vehicle unit, and an annunciation control portion that regards the on-vehicle unit as having received the external signal if the identifier information received by the identifier information reception portion does not correspond to predetermined identifier information stored in the identifier information storage portion, that does not regard the on-vehicle unit as having received the external signal if the identifier information received by the identifier information reception portion corresponds the predetermined identifier information, and that thereby controls the annunciation portion, wherein the identifier information storage portion increments a first counter based on identifier information for a plurality of on-vehicle units corresponding to the identifier information stored in the identifier information storage portion, and increments a second counter based on identifier information not corresponding to the identifier information stored in the identifier information storage portion, until a total of tile first counter and the second counter exceeds a predetermined number of on-vehicle units; and wherein thee annunciation portion annunciates the presence or absence of abnormal data based on whether any non-corresponding identifiers have been counted by the second counter of the identifier information storage portion.