Closed space monitor system
AssigneeAisin Seiki Kabushiki Kaisha
InventorHiroshi Touge
Life of this patent
Estimating the term…
Abstract
A closed space monitor system monitors the closed space by detecting a change in the air flow and the volume change of the closed space. The closed space monitor system includes a transmitter for generating and transmitting a compression wave of gas, a receiver for receiving the compression wave of gas, a inverting amplifier for amplifying the signal from the receiver via an electric current-voltage conversion portion, and automatic gain control portion. The amplified signal from the receiver is transmitted from the transmitter for generating the stationary wave in the closed space.
Claims19
A closed space monitor system comprising:
- a transmitter for generating and transmitting a compression wave of gas;
- a receiver for receiving the compression wave of gas and transmitting a signal;
- an amplifier portion which amplifies the signal transmitted from the receiver;
- and
- the amplified signal from the receiver being transmitted from the transmitter for generating a stationary wave in a closed space.
A closed space monitor system in a vehicle for detecting an occurrence of an intrusion into a closed space in the vehicle comprising:
- a transmitter for generating and transmitting a compression wave of gas;
- a receiver for receiving the compression wave and transmitting a signal;
- an amplifier which amplifies the signal transmitted from the receiver;
- the amplified signal from the receiver being transmitted from the transmitter for generating a stationary wave in the closed space of the vehicle, the stationary wave having an amplitude value and an effective value;
- and
- means for judging an occurrence of an intrusion into the closed space of the vehicle based on a fluctuation of the amplitude value of the stationary wave or the effective value of the stationary wave.
Dependencies are inferred from the claim text.