发明名称 |
Magnetic proximity sensor system and associated methods of sensing a magnetic field |
摘要 |
A magnetic proximity sensor is attached to a ferrous object such that the sensor alerts a practitioner if a threshold of magnetic strength has been exceeded by bringing the ferrous object within a certain proximity to the magnet of an MRI scanner. The magnetic proximity sensor includes at least one magnetic field sensor for sensing a magnetic field strength. An alarm in communication with the field sensor alerts a practitioner that a threshold of magnetic strength has been exceeded. A battery powers the field sensor and the alarm. The field sensor may produce an output voltage corresponding to the sensed magnetic field strength, and a potentiometer may provide a reference voltage corresponding to a threshold magnetic field strength. A comparator compares the reference voltage to the output voltage, and triggers an alarm if the output voltage exceeds the reference voltage. |
申请公布号 |
US8416076(B2) |
申请公布日期 |
2013.04.09 |
申请号 |
US20090417427 |
申请日期 |
2009.04.02 |
申请人 |
MAMOURIAN ALEXANDER;HOLLAND MICHAEL;THE TRUSTEES OF DARTMOUTH COLLEGE |
发明人 |
MAMOURIAN ALEXANDER;HOLLAND MICHAEL |
分类号 |
G08B13/24 |
主分类号 |
G08B13/24 |
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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