Sensor Device, Electronic Apparatus, and Moving Object

Patent metadata

Field	Value
Publication number	US-2016169675-A1
Application number	US-201514956732-A
Country	US
Kind code	A1
Filing date	Dec 2, 2015
Priority date	Dec 11, 2014
Publication date	Jun 16, 2016
Grant date	—

Abstract

A sensor device includes a first physical quantity sensor, a drive section adapted to generate a drive signal for driving the first physical quantity sensor with a drive frequency, a second physical quantity sensor, and an output section adapted to generate an output signal based on a signal from the second physical quantity sensor and a signal having a frequency n times (n is an integer equal to or greater than 1) as high as the drive frequency.

First claim

What is claimed is:

1 . A sensor device comprising:
a first physical quantity sensor; a drive section adapted to generate a drive signal for driving the first physical quantity sensor with a drive frequency; a second physical quantity sensor; and an output section adapted to generate an output signal based on a signal from the second physical quantity sensor and a signal having a frequency n times as high as the drive frequency assuming n as an integer one of equal to and greater than 1.

2 . The sensor device according to claim 1 , wherein
the signal having the frequency n times as high as the drive frequency is a signal from the drive section.

3 . The sensor device according to claim 2 , further comprising:
a filter section, to which the signal from the drive section is input, and which has filter characteristics of transmitting a signal in a first band including the drive frequency, and attenuating a signal in a second band higher than the first band, wherein the signal having the frequency n times as high as the drive frequency is a signal from the filter section.

4 . The sensor device according to claim 1 , further comprising:
a waveform shaping section to which a signal from the drive section is input, wherein the signal having the frequency n times as high as the drive frequency is a signal from the waveform shaping section.

5 . The sensor device according to claim 1 , further comprising:
a level-shift section adapted to decrease an amplitude of a signal from the drive section, wherein the signal having the frequency n times as high as the drive frequency is a signal from the level-shift section.

6 . The sensor device according to claim 4 , further comprising:
a level-shift section adapted to decrease an amplitude of the signal from the drive section, wherein the signal having the frequency n times as high as the drive frequency is a signal from the level-shift section.

7 . The sensor device according to claim 5 , further comprising:
a level-shift section adapted to decrease an amplitude of the signal from the drive section, wherein the signal having the frequency n times as high as the drive frequency is a signal from the level-shift section.

8 . The sensor device according to claim 1 , wherein
the first physical quantity sensor is an angular velocity sensor, and the second physical quantity sensor is an acceleration sensor.

9 . The sensor device according to claim 4 , wherein
the first physical quantity sensor is an angular velocity sensor, and the second physical quantity sensor is an acceleration sensor.

10 . The sensor device according to claim 5 , wherein
the first physical quantity sensor is an angular velocity sensor, and the second physical quantity sensor is an acceleration sensor.

11 . An electronic apparatus comprising:
the sensor device according to claim 1 .

12 . An electronic apparatus comprising:
the sensor device according to claim 2 .

13 . An electronic apparatus comprising:
the sensor device according to claim 3 .

14 . An electronic apparatus comprising:
the sensor device according to claim 4 .

15 . An electronic apparatus comprising:
the sensor device according to claim 5 .

16 . An electronic apparatus comprising:
the sensor device according to claim 6 .

17 . An electronic apparatus comprising:
the sensor device according to claim 7 .

18 . A moving object comprising:
the sensor device according to claim 1 .

19 . A moving object comprising:
the sensor device according to claim 2 .

20 . A moving object comprising:
the sensor device according to claim 3 .

Assignees

• Seiko Epson Corp

Inventors

• Shindo Takehiko

Classifications

• G01P15/125

  by capacitive pick-up · CPC title

• G01D21/02 Primary

  Measuring two or more variables by means not covered by a single other subclass · CPC title

• G01C19/5776 Primary

  Signal processing not specific to any of the devices covered by groups G01C19/5607 - G01C19/5719 · CPC title

• G01P15/097

  by vibratory elements · CPC title

• G01C19/5705 Primary

  using masses driven in reciprocating rotary motion about an axis · CPC title