|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||340/426 ; 340/425.5 ; 367/093 ; 367/094 ; 307/010.2|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 14 인용 특허 : 6|
An intrusion detecting apparatus for a vehicle comprises: a doppler shift signal outputting unit for outputting a doppler shift signal in response to a reflected and received ultrasonic signal from an ultrasonic receiver and a transmitted ultrasonic signal from a transmitter, an envelope detecting circuit for detecting the level of the received ultrasonic signal, and a detecting means for detecting an illegal intrusion by a person only when it is determined that the doppler shift signal is within a predetermined amount corresponding to the movement of a ...
[ What is claimed is:] [1.] An intrusion detecting apparatus for a vehicle comprising:ultrasonic transmitting means, provided in a passenger compartment of a vehicle, for transmitting an ultrasonic signal to be reflected in said passenger compartment;ultrasonic receiving means, provided in said passenger compartment, for receiving an ultrasonic signal reflected in said passenger compartment;doppler shift signal outputting means for outputting a doppler shift signal in response to said reflected and received ultrasonic signal from said ultrasonic receivin...