Intrusion detecting apparatus for a vehicle

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 receiving means and said transmitted ultrasonic signal from said ultrasonic transmitting means;
• receiving signal level detecting means for detecting the level of said received ultrasonic signal;
• first determining means for determining whether said doppler shift signal is within a predetermined amount corresponding to a movement of a person intruding into said passenger compartment;
• second determining means for determining whether the level of said received ultrasonic signal detected by said receiving signal level detecting means is out of a range of a disturbance;
• detecting means for detecting an illegal intrusion by a person only when said first determining means determines that said doppler shift signal is within said predetermined amount and said second determining means determines that the detected level of said received ultrasonic signal is out of said range;
• control means for intermittently supplying power for a predetermined time period to at least one of said ultrasonic transmitting means, said ultrasonic receiving means, said doppler shift signal outputting means, and said receiving signal level detecting means;
• and
• extending means for extending said predetermined time period of said control means when said first determining means determines that said doppler shift signal is within said predetermined amount.

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 receiving means and said transmitted ultrasonic signal from said ultrasonic transmitting means;
• receiving signal level detecting means for detecting the level of said received ultrasonic signal;
• first determining means for determining whether said doppler shift signal is within a predetermined amount corresponding to a movement of a person intruding into said passenger compartment, wherein said predetermined amount is a predetermined range of period and said first determining means determines whether a period of said doppler shift signal is within said predetermined range of period;
• second determining means for determining whether the level of said received ultrasonic signal detected by said receiving signal level detecting means is out of a range of a disturbance;
• detecting means for detecting an illegal intrusion by a person only when said first determining means determines that said doppler shift signal is within said predetermined amount and said second determining means determines that the detected level of said received ultrasonic signal is out of said range;
• control means for intermittently supplying power for a predetermined time period to at least one of said ultrasonic transmitting means, said ultrasonic receiving means, said doppler shift signal outputting means, and said receiving signal level detecting means;
• and
• extending means for extending said predetermined time period of said control means when said first determining means determines that said doppler shift signal is within said predetermined amount.

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 receiving means and said transmitted ultrasonic signal from said ultrasonic transmitting means;
• receiving signal level detecting means for detecting the level of said received ultrasonic signal;
• first determining means for determining whether said doppler shift signal is within a predetermined amount corresponding to a movement of a person intruding into said passenger compartment;
• second determining means for determining whether the level of said received ultrasonic signal detected by said receiving signal level detecting means is out of a range of a disturbance;
• detecting means for detecting an illegal intrusion by a person only when said first determining means determines that said doppler shift signal is within said predetermined amount and said second determining means determines that the detected level of said received ultrasonic signal is out of said range;
• control means for intermittently supplying power for a predetermined time period to at least one of said ultrasonic transmitting means, said ultrasonic receiving means, said doppler shift signal outputting means, and said receiving signal level detecting means;
• and
• extending means for extending said predetermined time period of said control means when said first determining means determines that said doppler shift signal is within said predetermined amount,
• wherein the determination effected by said first determining means is effected only after said second determining means determines that the detected level of said received ultrasonic signal is out of said range of a disturbance.