发明名称 |
METHOD FOR CONTACTLESSLY MEASURING A RELATIVE POSITION BY MEANS OF A 3D HALL SENSOR HAVING MEASUREMENT SIGNAL STORE |
摘要 |
<p>The present invention relates to a method for contactlessly measuring a relative position of a magnetic field source (102) which produces a magnetic field and a magnetic field sensor (100) in relation to each other. The present invention further also relates to a corresponding displacement sensor. The invention describes an operating principle of a sensor which is based on the Hall effect and which achieves an increase in the sensor output range with a magnet which is simultaneously reduced in size by storing the earlier value when control by the magnetic field is lost. In particular, the method comprises the steps of: calculating the position signal on the basis of a quotient of two magnetic flux density components; calculating a magnitude of the magnetic flux density and comparing the magnitude with a predetermined threshold value; outputting the current calculated position signal if the magnitude of the magnetic flux density is higher than the threshold value; outputting a preceding stored position signal if the magnitude of the magnetic flux density is smaller than or equal to the threshold value; storing the output position signal.</p> |
申请公布号 |
EP2820384(B1) |
申请公布日期 |
2015.08.12 |
申请号 |
EP20130709809 |
申请日期 |
2013.03.01 |
申请人 |
TYCO ELECTRONICS AMP GMBH |
发明人 |
SCHAAF, OLIVER |
分类号 |
G01D5/14;G01B7/004;G01B7/30;G01D5/244 |
主分类号 |
G01D5/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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