发明名称 |
Electric jack ground contact detection method and device |
摘要 |
An electric jack ground contact detection method and device for detecting ground contact of an electric motor-driven jack as the jack is being extended to adjust the attitude of a mobile platform. The device includes a controller that monitors the electrical power draw of an electric motor-driven jack while the jack is being extended for use in adjusting the attitude of a mobile platform. The controller recognizes jack ground contact when the monitored power draw value exceeds a ground contact power draw value consistent with jack ground contact. The controller calculates the ground contact power draw value as equaling the sum of a dynamically-adjusted threshold power draw value associated with jack extension before ground contact and a power draw increase value equaling an amount of additional power that the jack is known to draw as a result of jack ground contact.
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申请公布号 |
US7193381(B2) |
申请公布日期 |
2007.03.20 |
申请号 |
US20050243253 |
申请日期 |
2005.10.04 |
申请人 |
INNOVATIVE DESIGN SOLUTIONS |
发明人 |
FORD ROBERT M.;MANFREDA JOHN P.;WOLOSZYK MARK J.;HALEY SHAWN P. |
分类号 |
H02P7/00 |
主分类号 |
H02P7/00 |
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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