METHOD FOR PROCESSING DETECTION SIGNAL OF VIBRATORY INERTIAL FORCE SENSOR AND VIBRATORY INERTIAL FORCE SENSOR

• US 20100095772A1
• Filed: 12/23/2009
• Published: 04/22/2010
• Est. Priority Date: 10/11/2005
• Status: Active Grant

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Uemura, Takeshi
• Granted Patent: US 7,886,622 B2
• Time in Patent Office: Days
• US Class Current: 73/504.16
• CPC Class Codes: G01C 19/5607 using vibrating tuning forks double-ended tuning forks using planar vibrating masses suspended at opposite ends G01C19/5719
• CPC Class Codes: G01C 19/5614 Signal processing

Abstract

A method for processing a detection signal of a vibratory inertial force sensor is disclosed. This method improves detection accuracy of the vibratory inertial force sensor. A detection circuit of the vibratory inertial force sensor removes harmonic component from signals synchronously wave-detected, and amplifies the resultant signals, and then smoothes the amplified signals. A vibratory inertial force sensor adopting this method is also disclosed.

Claims

1. A vibratory inertial force sensor comprising:

a drive arm;

a driver disposed to the drive arm for vibrating the drive arm;

a sensor section for generating a detection signal through deflection produced by inertial force applied to the drive arm;

a monitor for monitoring the vibration of the drive arm;

a drive control circuit for controlling an amount of vibration of the drive arm; and

a detection circuit for processing the detection signal,

wherein, the detection circuit synchronously wave-detects the detection signals detected by the sensor section with a monitor signal supplied from the monitor, removes harmonic component from the signals synchronously wave-detected, amplifies the signals from which the harmonic component is removed, and then smoothes the amplified signals.