US 2021/0293945 A1 · DISPLACEMENT MEASURING APPARATUS

Abstract

A displacement measuring apparatus includes a plurality of reflective members disposed at a detection target such as a seat in a vehicle. A signal source and a transmitting antenna transmit a radio wave of a predetermined frequency that can pass through a human body to each of the plurality of reflective members, and a receiving antenna and a mixer receive the radio wave reflected by each of the plurality of reflective members and returned. A distance calculation unit calculates information on distances to the plurality of reflective members based on information on a time until the transmitted radio wave returns, and a displacement-distribution measuring unit calculates a displacement of each of the plurality of reflective members based on the information on the distances.

Claims18

Dependent claims

A displacement measuring apparatus comprising:

a plurality of reflective members disposed at a detection target;
a transmission unit configured to transmit a radio wave of a predetermined frequency that can pass through a human body to each of the plurality of reflective members;
a receiving unit configured to receive the radio wave of the predetermined frequency reflected by each of the plurality of reflective members and returned;
a distance calculation unit configured to calculate information on distances to the plurality of reflective members based on information on a time until the radio wave transmitted from the transmission unit returns to the receiving unit;
and a displacement calculation unit configured to calculate a displacement of each of the plurality of reflective members based on the information on the distances.

2 more elements

Dependencies are inferred from the claim text.

Displacement measuring apparatus

Life of this patent

Displacement measuring apparatus

Life of this patent

Abstract

Claims18