Patient lift and sling having a sling loop orientation sensor

A person lift system comprising:

• a motor,
• a sling bar coupled to the motor, the sling bar including an attachment hook,
• a sling including a main body section and a loop coupled to the main body section, the loop configured to attach to the attachment hook,
• an electronic reader coupled to the sling bar near the attachment hook,
• a short range wireless tag coupled to the loop at a position spaced apart from the main body section, wherein the electronic reader reads short range tag identification signals from the short range wireless tag to determine whether the loop is coupled to the attachment hook, wherein the sling is configured so that the short range wireless tag is closer to the attachment hook than to the main body section when the loop is coupled to the attachment hook and an occupant is supported by the sling, and
• an accelerometer coupled to the loop and configured to determine an orientation of the loop with respect to a direction of gravity or with respect to horizontal.