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Apparatus and Method for Calibration of Force Sensors

IP.com Disclosure Number: IPCOM000249401D
Publication Date: 2017-Feb-23
Document File: 5 page(s) / 395K

Publishing Venue

The IP.com Prior Art Database

Related People

Igor Polishchuk: INVENTOR [+2]

Abstract

Implementation of force sensing in mobile devices requires extensive calibration: applying force of multiple magnitudes in multiple locations on the surface of the device. The speed of the calibration process is a key competitive advantage. This invention disclosure describes the apparatus and method of efficient calibration.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 38% of the total text.

Apparatus and Method for calibration of Force Sensors Igor Polishchuk

Copyright © 2017 Synaptics Incorporated, All Rights Reserved. Page: 1 of 5

Information contained in this publication is provided as-is, with no express or implied warranties, including any warranty of

merchantability, fitness for any particular purpose, or non-infringement. Synaptics Incorporated assumes no liability whatsoever for any

use of the information contained herein, including any liability for intellectual property infringement. This publication conveys no express

or implied licenses to any intellectual property rights belonging to Synaptics or any other party. Synaptics may, from time to time and at its

sole option, update the information contained herein without notice.

Apparatus and Method for Calibration of Force Sensors

Inventor(s): Igor Polishchuk and Jacod Tu

Synaptics Incorporated, San Jose, CA, USA

Short Summary

Implementation of force sensing in mobile devices requires extensive calibration: applying force of

multiple magnitudes in multiple locations on the surface of the device. The speed of the calibration

process is a key competitive advantage. This invention disclosure describes the apparatus and method of

efficient calibration.

Some Problems Solved

Examples of some of the problems addressed by the invention include:

Presently known methods of multi-weight calibration include:

• Manually changing the weights in the middle of calibration process

• Transferring device from one station to another (which uses a different weight)

Both methods are time-consuming and error-prone. Also the latter method requires more equipment and

factory floor space.

General Description

The apparatus consists of:

A. Frame

B. Holder

Apparatus and Method for calibration of Force Sensors Igor Polishchuk

Copyright © 2017 Synaptics Incorporated, All Rights Reserved. Page: 2 of 5

Information contained in this publication is provided as-is, with no express or implied warranties, including any warranty of

merchantability, fitness for any particular purpose, or non-infringement. Synaptics Incorporated assumes no liability whatsoever for any

use of the information contained herein, including any liability for intellectual property infringement. This publication conveys no express

or implied licenses to any intellectual property rights belonging to Synaptics or any other party. Synaptics may, from time to time and at its

sole option, update the information contained herein without notice.

C. spindle

D. Set of weights

The apparatus is attached to a robot that controls its x, y, and z-positions.

Controlling Z-height of the apparatus allows to control the weight applied to the mobile device being

calibrated/ tested.

As Z-height of the apparatus is lowered, at some point the tip of the spindle tip touches the surface and

the weight of the spindle alone is applied to the surface of the DUT (device undergoing calibration).

If the Z-height of the apparatus is lower further, first of the weig...