A school bus stop arm and a drive unit therefor are disclosed. The stop arm 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 is 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.
本申请公开了一种校车停车信号臂及其驱动单元。所述停车信号臂包含停车标牌,以及用于在缩回位置和展开位置之间移动所述停车标牌的驱动单元。所述驱动单元包括可操作地耦接到所述停车标牌的电动机、可操作以检测所述停车标牌出现的一个或多个位置传感器,以及用于控制所述电动机的操作的控制器。所述控制器被配置成:监视所述电动机的一个或多个操作特性,以得到指示所述停车标牌的移动受到阻碍的情形;监视所述位置传感器,以得到指示所述停车标牌出现在所述展开位置或缩回位置中的确认信号;以及基于指示受到阻碍的情形和所述确认信号,确定所述停车标牌已到达所述展开位置和缩回位置中的一个还是正受到阻碍。
SCHOOL BUS STOP ARM AND DRIVE UNIT THEREFOR
校车停车信号臂及其驱动单元
2021-04-09
Patent
Electronic Resource
Chinese
IPC: | B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein |