公开(公告)号：US20210221283A1

公开(公告)日：2021-07-22

申请号：US17259876

申请日：2019-07-12

Applicant: SMARTREND SUPPLY LTD.

Inventor： Michael YUDELEVICH ,  Kevin Peter SMITH ,  Bradley Dale BROWN ,  Andrew Allan Clark MCKAY ,  Cam FORMAN ,  David BEERNAERT

IPC: B60Q1/50 ,  B60Q1/26

Abstract: A school bus stop arm and drive unit therefor are disclosed. The stop an includes a stop sign and a drive unit for moving the stop sign between a retracted position and a deployed position. The drive unit comprises a motor operably coupled to the stop sign, one or more position sensors operable to detect the presence of the stop sign, and a controller for controlling operation of the motor. The controller configured to, monitor one or more operating characteristics of the motor for conditions indicative of an obstruction to movement of the stop sign, monitor the position sensor for a confirmation signal indicative of the presence of the stop sign in the deployed or retracted position, and based on the conditions indicative of an obstruction and the confirmation signal, determine if the stop sign has reached one of the deployed and retracted positions or is being obstructed.