Calibration jig and algorithms for accelerometer

• US 20090013755A1
• Filed: 07/10/2007
• Published: 01/15/2009
• Est. Priority Date: 07/10/2007
• Status: Abandoned Application

• Current Assignee: Polestar Technologies Inc.
• Original Assignee: Polestar Technologies Inc.
• Inventors: Wang, Shang-Ming, Tsai, Ming-Zuan
• Application Number:
  US11/822,835
• Publication Number:
  US 20090013755A1
• Time in Patent Office: Days
• US Class Current: 73/1.380
• CPC Class Codes: G01P 21/00 Testing or calibrating of apparatus or devices covered by the preceding groups

Abstract

The present invention provides a calibration system for accelerometer and the method of using the same. The calibration system includes a hexahedral calibration jig placed on a calibrated platform and a calibration module. The calibration jig includes at least four planes that are arranged in parallel or vertical with each other. The calibration module may be performing three algorithms for calibrating an accelerometer and calculating parameters for coordinate transfer.

Claims

1. A calibration system for an accelerometer, comprising:

a calibration jig; and

a calibration module to perform three algorithms for calibrating an accelerometer and calculating parameters for coordinate transfer.

2. The system of claim 1, wherein said calibration jig comprises a hexahedron jig having a plurality of six planes arranged in parallel or vertical with each other for providing a reference when calibrating said accelerometer.

3. The system of claim 1, wherein the first of said three algorithms is for calibrating zero g bias on each axis of said accelerometer.

4. The system of claim 1, wherein the second of said three algorithms is for calibrating 1g sensitivity on each axis of said accelerometer.

5. The system of claim 1, wherein the third of said three algorithms is for calibrating and calculating nine direction cosines of said parameters to be used in coordinate transfer.

6. The system of claim 1, wherein said calibration module includes a calibration circuit.