초록 ▼

A sitting state detector of the present invention has an electrode which is installed in a seat back and which has a capacitance fluctuating depending on whether or not a passenger sits in a normal posture, conversion means for generating an electric signal corresponding to the capacitance, means wh

A sitting state detector of the present invention has an electrode which is installed in a seat back and which has a capacitance fluctuating depending on whether or not a passenger sits in a normal posture, conversion means for generating an electric signal corresponding to the capacitance, means which detects predetermined changes in the electric signal and which generates a detection signal indicative of whether or not the passenger sits in the normal posture, a sitting state sensor for a seat cushion, and control means which adjusts the conversion means for standardizing the electric signal at intervals of a short period and by a great amount in the absence of a sitting passenger and which adjusts the conversion means at intervals of a long period and by a small amount in the presence of a sitting passenger.

대표청구항 ▼

[ What is claimed is:] [1.]1. A sitting state detector comprising:a short-range sensor having a short-range detection electrode which is installed in a seat back that supports a back of a passenger and that belongs to a seat having a seat cushion for supporting the passenger thereon and which has a

[ What is claimed is:] [1.]1. A sitting state detector comprising:a short-range sensor having a short-range detection electrode which is installed in a seat back that supports a back of a passenger and that belongs to a seat having a seat cushion for supporting the passenger thereon and which has a capacitance fluctuating depending on whether or not the back of the passenger is at a predetermined position with respect to the seat back, physical quantity conversion means for generating an electric signal corresponding to the capacitance of the electrode, and detection signal means which detects predetermined changes in the electric signal and which generates a detection signal indicative of whether or not the back of the passenger is at the predetermined position;a sitting state sensor which is provided in the seat cushion and which is different from the short-range sensor in passenger detection mechanism; andcontrol means for changing an adjustment speed for conversion characteristics of the physical quantity conversion means in accordance with a detection state of the sitting state sensor.