US Patent 10081524 Monitoring system for two-post lift

A vehicle lift comprising a vertically-orientated column and a pair of swing arms vertically-shiftable with respect to the post. The swing arms are configured to rotate with respect to the column. The vehicle lift additionally includes a sensor associated with each swing arm. Each sensor is configured to obtain information related to its respective swing arm. Each sensor is also associated with a radio-frequency identification (RFID) tag, with the RFID tag being configured to provide power to its respective sensor. The vehicle lift further includes a system controller in communication with the sensors and configured to control the vehicle lift based on the information obtained by the sensors.