发明名称 |
Above ground loop system proximity detection |
摘要 |
A loop detection apparatus and corresponding methods are provided that includes an inductive loop and a processing device. The processing device includes circuitry to connect to the inductive loop and control and sense from the inductive loop a change in a characteristic thereof. The inductive loop is disposed at least partially above a surface on which a vehicle travels. The processing device detects a change in a characteristic of the inductive loop beyond a first threshold value, and in response, transmits a first signal configured to effect a first action. The processing device further detects a change in the characteristic of the inductive loop beyond a second threshold value, and in response, transmits a second signal configured to effect a second action different than the first action. |
申请公布号 |
US9514643(B2) |
申请公布日期 |
2016.12.06 |
申请号 |
US201414551889 |
申请日期 |
2014.11.24 |
申请人 |
The Chamberlain Group, Inc. |
发明人 |
Fitzgibbon James J. |
分类号 |
G08G1/042;G08G1/015;G07B15/04;G08G1/056 |
主分类号 |
G08G1/042 |
代理机构 |
Fitch Even Tabin & Flannery LLP |
代理人 |
Fitch Even Tabin & Flannery LLP |
主权项 |
1. A loop detection apparatus comprising:
an inductive loop; a processing device comprising circuitry configured to connect to the inductive loop and sense from the inductive loop a change in inductance of the inductive loop; and wherein the inductive loop is configured to be disposed at least partially above a surface on which a vehicle travels, wherein the processing device is configured to detect a change in inductance of the inductive loop beyond a first threshold value, wherein in response to detecting the change in inductance of the inductive loop beyond the first threshold value, the processing device is configured to transmit a first signal configured to effect a first action, wherein the processing device is configured to detect a change in inductance of the inductive loop beyond a second threshold value, wherein in response to detecting the change in inductance of the inductive loop beyond the second threshold value, the processing device is configured to transmit a second signal to effect a second action different from the first action. |
地址 |
Elmhurst IL US |