US 2014/0236354 A1 · FORCE DETECTION DEVICE, ROBOT, AND MOVING OBJECT

Abstract

A force detection device includes a charge output element that outputs charge in accordance with a received external force, a conversion and output circuit, having a first switching element and a first capacitor, which converts the charge into a voltage and outputs the voltage, a compensation signal output circuit, having a second switching element and a second capacitor, which outputs a compensation signal, and an external force detection circuit that detects an external force on the basis of the voltage which is output from the conversion and output circuit and the compensation signal which is output from the compensation signal output circuit. The capacitance of the second capacitor is smaller than the capacitance of the first capacitor.

Claims19

Dependent claims

A force detection device comprising:

a charge output element that outputs charge in accordance with an external force;
a conversion and output circuit, having a first capacitor, which converts the charge into a voltage and outputs the voltage;
a compensation signal output circuit, having a second capacitor, which outputs a compensation signal;
and
an external force detection circuit that detects the external force on the basis of the voltage which is output from the conversion and output circuit and the compensation signal which is output from the compensation signal output circuit,
wherein a capacitance of the second capacitor is smaller than a capacitance of the first capacitor.

3 more elements

A force detection device comprising:

a first element and a second element that output voltages in accordance with an external force;
and
a external force detection circuit that detects the external force on the basis of the voltages which are output from the first element and the second element,
wherein the first element and the second element include
a piezoelectric substance, having a electric axis, which outputs charge in accordance with the external force along the electric axis, and
a conversion and output circuit that converts the charge which is output from the piezoelectric substance into the voltage, and
the first element and the second element are disposed so that a direction of the electric axis included in the piezoelectric substance of the first element and a direction of the electric axis included in the piezoelectric substance of the second element are opposite to each other.

4 more elements

Dependencies are inferred from the claim text.

Force detection device, robot, and moving object

Life of this patent

Force detection device, robot, and moving object

Life of this patent

Abstract

Claims19