发明名称 |
Tractor-trailer coupling detection |
摘要 |
To test whether a trailer is coupled to a tractor when the tractor ignition switch is off, a test switch in the trailer connects a high-impedance power source in a trailer to a line carrying energy from the tractor ignition switch to the trailer's electrical load, and measures the voltage at the line. A high voltage indicates a connection only to the electrical load in the trailer and thus a decouple. A low voltage indicates a measurement of the electrical loads in both trailer and tractor and hence a coupling. |
申请公布号 |
US8704650(B1) |
申请公布日期 |
2014.04.22 |
申请号 |
US20110987204 |
申请日期 |
2011.01.10 |
申请人 |
PERTEN HERBERT;SCHICKE ROBERT;STARTRAK INFORMATION TECHNOLOGIES, LLC |
发明人 |
PERTEN HERBERT;SCHICKE ROBERT |
分类号 |
G08B21/00;B60R25/10;G08B29/00 |
主分类号 |
G08B21/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|