System and method for sensor calibration

a sensor and calibration system technology, applied in the field of microelectromechanical systems (mems) devices, can solve problems such as false measurements, parts that are not desirable to move, and introduce errors into the measurement capabilities of the mems devi

Inactive Publication Date: 2019-11-14
INVENSENSE
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This approach reduces the frequency of sensor recalibration, minimizes power consumption, and ensures accurate orientation determination by comparing signals from different sensor subsets, effectively addressing errors caused by external influences.

Problems solved by technology

Sometimes, large external acceleration or shock may impart undesirable movements of the movable portions.
These undesirable movements may induce false measurements or introduce errors into the measurement capabilities of the MEMS device.
Sometimes, sensor outputs may drift over time, introducing errors in the measurement capabilities.
Calibration of a sensor may require computing cycles from a host device coupled to the MEMS device, which may result in significant consumption of power of the host device.
Further, a host device or a MEMS device may include a plurality of sensors and re-calibrating all the sensors may consume significant power of the host device.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • System and method for sensor calibration
  • System and method for sensor calibration
  • System and method for sensor calibration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020]To facilitate an understanding of the adaptive aspects of the present disclosure, an exemplary system and method for calibration of one or more sensors of a system with a plurality of sensors is described. The specific construction and operation of the adaptive aspects of the system and method for calibration of one or more sensors of a system with a plurality of sensors of the present disclosure are described with reference to an exemplary host device.

[0021]FIG. 1 shows a host device 100, in accordance with an embodiment of this disclosure. The orientation of the host device 100 is defined using a device frame defined by a first side 102, a second side 104 and a third side 106 of the device. As one skilled in the art appreciates, the first side 102, second side 104 and third side 106 are substantially orthogonal to each other. In one example, the host device 100 may be a mobile device, with a display screen 108 disposed over the third side 106. In some examples, the host devi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A method and system to determine orientation of a device is disclosed. The device includes a plurality of sensors. A first signal indicative of an orientation of the device is generated using at least a first subset of sensors, with at least one sensor. A second signal indicative of the orientation of the device is generated using at least a second subset of sensors, with at least one sensor. The first signal and the second signal is compared to determine if indicated orientation is acceptable. If the orientation is not acceptable, one or more sensors are calibrated.

Description

RELATED APPLICATION[0001]This application is a divisional application of and claims priority to patent application Ser. No. 14 / 644,171 titled “SYSTEM AND METHOD FOR SENSOR CALIBRATION” filed on Mar. 10, 2015, which is incorporated herein by reference in its entirety.TECHNICAL FIELD[0002]The present invention relates generally to microelectromechanical systems (MEMS) device and more particularly, to MEMS devices with one or more sensors.DESCRIPTION OF RELATED ART[0003]MEMS devices are formed using various semiconductor manufacturing processes. MEMS devices may have fixed and movable portions. MEMS force sensors have one or more sense material, which react to an external influence imparting a force onto the movable portions. The sense material can be the MEMS structural layer or a deposited layer. The MEMS force sensor may be configured to measure these movements induced by the external influence to determine the type and extent of the external influence.[0004]Sometimes, large externa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityApplications(United States)
IPC IPC(8): G01C25/00G01P21/00
CPCG01P21/00G01C25/005
InventorKEAL, WILLIAM KERRY
OwnerINVENSENSE