METHOD OF SENSING SLIDING BY HALL SENSOR AND SENSING SYSTEM USING THE SAME

• US 20150061648A1
• Filed: 03/05/2014
• Published: 03/05/2015
• Est. Priority Date: 08/29/2013
• Status: Active Grant

• Current Assignee: Magnachip Semiconductor Limited (Magnachip Semiconductor)
• Original Assignee: Magnachip Semiconductor Limited (Magnachip Semiconductor)
• Inventors: PARK, Seung-hwan, JIN, Hyung-nam
• Granted Patent: US 9,612,134 B2
• Time in Patent Office: Days
• US Class Current: 324/207.2
• CPC Class Codes: G01B 7/003 for measuring position, not involving coordinate determination coordinate measuring G01B7/004
• CPC Class Codes: G01B 7/14 for measuring distance or clearance between spaced objects or spaced apertures G01B7/30 takes precedence
• CPC Class Codes: G01D 5/145 influenced by the relative movement between the Hall device and magnetic fields see G01R33/06
• CPC Class Codes: G01R 33/07 Hall effect devices

Abstract

A method of sensing a sliding by a sensor including grouping one or more Hall elements into one or more groups, measuring magnetic field strength generated by a magnetic field source, and comparing the magnetic field strength at the one or more Hall elements to determine whether a horizontal sliding occurs.

Claims

1. A method of sensing a sliding by a sensor, comprising:

arranging one or more Hall elements;

arranging a magnetic field source configured to generate a magnetic field;

grouping the one or more Hall elements into one or more groups; and

measuring, using the one or more Hall elements, magnetic field strength generated by the magnetic field source.

2. The method of claim 1, further comprising:

comparing the magnetic field strength generated at the one or more Hall elements;

determining whether a horizontal sliding occurs, wherein

the arranging one or more Hall elements comprises arranging one or more Hall elements on a first body;

the arranging a magnetic field source comprises arranging the magnetic field source on a second body corresponding to the first body; and

the determining whether a horizontal sliding occurs comprises determining whether a horizontal sliding of the second body from the surface of the first body occurs.

3. The method of claim 2, wherein the comparing the magnetic field strength comprises checking a similarity of the magnetic field strength generated at the one or more Hall elements.

4. The method of claim 3, wherein the checking a similarity comprises determining a ratio of a magnetic field strength collected from a first Hall element to a magnetic field strength collected from a second Hall element of a group.

5. The method of claim 4, wherein the comparing the magnetic field strength further comprises measuring a standard deviation of the magnetic field strength.

6. The method of claim 5, wherein the determining whether a horizontal sliding of the second body from a surface of the first body occurs comprises determining that a sliding of the second body does not occur in response to the similarity and the standard deviation satisfying a threshold.

7. The method of claim 5, wherein the determining whether a horizontal sliding of the second body from a surface of the first body occurs comprises determining that a sliding of the second body occurs in response to one of the similarity and the standard deviation not satisfying a threshold.

8. The method of claim 4, wherein a threshold of the similarity ranges from about 0.5 to about 1.5.

9. The method of claim 5, wherein a threshold of the standard deviation ranges from about 0 to about 0.5.

10. The method of claim 2, wherein the first body comprises a terminal comprising a sensor chip.

11. The method of claim 2, wherein the second body comprises a flip cover comprising a magnet.

12. The method of claim 1, wherein the one or more groups are determined using a distance between the magnetic field source and the one or more Hall elements.

13. A sensing device, comprising:

one or more Hall elements configured to collect an external magnetic field strength;

a similarity measurement unit configured to measure a similarity of the magnetic field strength; and

a standard deviation measurement unit configured to measure a standard deviation of the magnetic field strength.

14. The sensing device of claim 13, further comprising:

a checking unit configured to check whether one of the similarity and the standard deviation is satisfied; and

a determination unit configured to determine whether a horizontal sliding of a cover from a surface comprising the one or more Hall elements occurs.

15. The sensing device of claim 14, wherein the determination unit is configured to determine that a sliding of the second body does not occur in response to the similarity and the standard deviation satisfying a threshold.

16. The sensing device of claim 14, wherein the determination unit is configured to determine that a sliding of a second body occurs in response to one of the similarity and the standard deviation not satisfying a threshold.

17. The sensing device of claim 13, wherein a threshold of the similarity ranges from about 0.5 to about 1.5.

18. The sensing device of claim 13, wherein a threshold of the standard deviation ranges from about 0 to about 0.5.

19. A device for sensing a horizontal sliding of a cover, comprising:

one or more Hall elements arranged on the device and configured to detect magnetic field strength generated by a magnetic field source on the cover;

a grouping unit configured to group the one or more Hall elements into one or more groups; and

a determination unit configured to determine whether a horizontal sliding of the cover occurs.

20. The device of claim 19, wherein the determination unit is configured to determine whether a horizontal sliding of the cover occurs by comparing a similarity and a standard deviation of the one or more Hall elements of the one or more groups with a similarity threshold and a standard deviation threshold.