Method of sensing sliding by hall sensor and sensing system using the same
First Claim
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1. A sensing device for sensing a horizontal sliding of a cover on a body, comprising:
- a magnetic field source on the cover; and
a Hall sensor in the body comprising a first Hall element and a second Hall element, wherein the first Hall element and the second Hall element are configured to detect a magnetic field strength generated by the magnetic field source on the cover and produce a first magnetic field strength and a second magnetic field strength, respectively, andwherein the Hall sensor further comprises;
a similarity measurement unit configured to measure a ratio of the first magnetic field strength and the second magnetic field strength to produce a similarity value; and
a standard deviation measurement unit configured to measure a standard deviation of the first magnetic field strength and the second magnetic field strength to produce a standard deviation value,a checking unit configured to check whether a threshold of one of the similarity value and the standard deviation value is satisfied, anda determination unit configured to determine an occurrence of a horizontal sliding of the cover on a surface of the body comprising the Hall elements based on a result of the check.
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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.
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Citations
10 Claims
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1. A sensing device for sensing a horizontal sliding of a cover on a body, comprising:
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a magnetic field source on the cover; and a Hall sensor in the body comprising a first Hall element and a second Hall element, wherein the first Hall element and the second Hall element are configured to detect a magnetic field strength generated by the magnetic field source on the cover and produce a first magnetic field strength and a second magnetic field strength, respectively, and wherein the Hall sensor further comprises; a similarity measurement unit configured to measure a ratio of the first magnetic field strength and the second magnetic field strength to produce a similarity value; and a standard deviation measurement unit configured to measure a standard deviation of the first magnetic field strength and the second magnetic field strength to produce a standard deviation value, a checking unit configured to check whether a threshold of one of the similarity value and the standard deviation value is satisfied, and a determination unit configured to determine an occurrence of a horizontal sliding of the cover on a surface of the body comprising the Hall elements based on a result of the check. - View Dependent Claims (2, 3, 4, 5)
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6. A device for sensing a horizontal sliding of a cover on a body, comprising:
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a magnetic field source on the cover; and a Hall sensor comprising Hall elements arranged on the body, wherein each of the Hall elements is configured to detect a magnetic field strength generated by the magnetic field source on the cover and produce Hall voltages data-based on the magnetic field strength, and wherein the Hall sensor is configured to; group the Hall elements into groups; and determine whether a horizontal sliding of the cover occurs by calculating a ratio of first and second Hall voltages of respective detected magnetic field strengths of Hall elements in one of the groups and comparing the ratio with a threshold. - View Dependent Claims (7)
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8. A sensing device comprising:
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a first body; first and second Hall elements disposed on the first body wherein the first Hall element is displaced in the first direction from the second Hall element; and a magnetic field source disposed on a second body wherein the magnetic field source is configured to generate a magnetic field; wherein the sensing device is configured to measure the magnetic field at each of the first and second Hall elements, and compare a strength of the magnetic field measured at the first Hall element to a strength of the magnetic field measured at the second Hall element, and determine whether the second body moves in the first direction relative to the first body. - View Dependent Claims (9, 10)
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Specification