초록 ▼

An internal entrapment system for a garage door operator (30) includes a motor (48) for transferring a garage door (12) between first and second positions. Also included is a pulse counter (62) for detecting a speed of the garage door (12) during transfer between first and second positions; a potent

An internal entrapment system for a garage door operator (30) includes a motor (48) for transferring a garage door (12) between first and second positions. Also included is a pulse counter (62) for detecting a speed of the garage door (12) during transfer between first and second positions; a potentiometer (56) for determining a plurality of positional locations of the garage door (12) during transfer between first and second positions separate from the pulse counter (62); and a control circuit (50) for calculating a motor torque value from the speed for each of the plurality of positional locations to compare with a plurality of door profile data points. The control circuit (50) takes corrective action if the difference between the motor torque value for each of the plurality of positional locations and the plurality of door profile data points exceeds a predetermined threshold. The control circuit (50) also updates the plurality of door profile data points to the motor torque values for each respective positional location if the predetermined threshold is not exceeded. In another embodiment both speed and position are detected by a slider element (58) which is connected to the control circuit (50). In yet another embodiment a sensor (60) detects non-movement of the door during an open/close cycle and stops operation of the motor (48).

대표청구항 ▼

[ We claim:] [1.] An internal entrapment system for a garage door controlled by an open loop garage door operator, comprising:a counter-balancing system for transferring the garage door from a first to a second position, wherein said counter-balancing system includes a motor with a drive shaft that

[ We claim:] [1.] An internal entrapment system for a garage door controlled by an open loop garage door operator, comprising:a counter-balancing system for transferring the garage door from a first to a second position, wherein said counter-balancing system includes a motor with a drive shaft that only drives the door from said first position to said second position, said counter-balancing system allowing the door to move from said second position to said first position and allowing rotation of said drive shaft;means for detecting a speed of the garage door during transfer between first and second positions solely from said drive shaft;means for determining a plurality of positional locations of the garage door during transfer between first and second positions, wherein said determining means is separate from said detecting means; andcontroller means for calculating a motor torque value from said detecting means for each of said plurality of positional locations from said determining means to compare with a plurality of door profile data points, wherein said controller means takes corrective action if the difference between the motor torque value for any one of said plurality of positional locations goes beyond a predetermined threshold for a respective one of said plurality of door profile data points, otherwise said controller means updates said plurality of door profile data points to the motor torque values for each respective said plurality of positional locations.