Automatic door operator including electronic travel detection
DCFirst Claim
1. An automatic door operator for controlling a motor coupled for closing and opening a door, said automatic door operator comprising:
- a motor speed detector coupled to the motor for detecting the speed of the motor;
means for independently setting opening and closing torque limits by a user including a user settable closing torque limit input device for selecting a closing torque limit and a user settable opening torque limit input device for selecting an opening torque limit; and
a controller connected to said motor speed detector, said closing torque limit input device and said opening torque limit input device for controlling them motor to open and close the door, said controller including an obstruction detector operative toat least stop the motor to stop movement of the door when the detected motor speed indicates a closing motor torque greater than said selected closing torque limit when the motor is closing the door, andat least stop the motor to stop movement of the door when the detected motor speed indicates an opening motor torque greater than said selected opening torque limit when the motor is opening the door.
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Abstract
The present invention is an automatic door operator which includes an obstruction detector for at least stopping the motor when the detected motor speed indicates a motor torque greater than the selected closing torque limit while closing the door, and for at least stopping the motor when the detected motor speed indicates a motor torque greater than the selected opening torque limit while opening the door. The motor speed is detected based upon a predetermined count of electrical pulses corresponding to motor shaft rotation in order smooth noise. Selection of the number of pulses per rotation enables the same controller to control motors operating on either 60 Hz or 50 Hz power. A travel count of rotation pulses permits identification of a plurality of regions in the opening and closing travel of the door and corresponding adaptive torque limits. The travel counter may also be employed for detection of the fully opened and fully closed limits. The controller can be used to control either a four-pole motor or a six-pole motor via a manual motor type selection switch, which selects a torque limit table.
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Citations
53 Claims
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1. An automatic door operator for controlling a motor coupled for closing and opening a door, said automatic door operator comprising:
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a motor speed detector coupled to the motor for detecting the speed of the motor; means for independently setting opening and closing torque limits by a user including a user settable closing torque limit input device for selecting a closing torque limit and a user settable opening torque limit input device for selecting an opening torque limit; and a controller connected to said motor speed detector, said closing torque limit input device and said opening torque limit input device for controlling them motor to open and close the door, said controller including an obstruction detector operative to at least stop the motor to stop movement of the door when the detected motor speed indicates a closing motor torque greater than said selected closing torque limit when the motor is closing the door, and at least stop the motor to stop movement of the door when the detected motor speed indicates an opening motor torque greater than said selected opening torque limit when the motor is opening the door. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. An automatic door operator for controlling a motor coupled for closing and opening a door, said automatic door operator comprising:
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a rotation pulse generator coupled to a rotating shaft of the motor for producing electrical pulses corresponding to rotation of the shaft of the motor; an operator settable closing torque limit input device for selecting a closing torque limit; an operator settable opening torque limit input device for selecting an opening torque limit; a travel counter connected to said rotation pulse generator for counting said electrical pulses; a close travel memory for storing therein a close travel count corresponding to movement of the door to a fully closed position; an open travel memory for storing therein an open travel count corresponding to movement of the door to a fully opened position; and a controller connected to said rotation pulse generator, said closing torque limit input device, said opening torque limit input device, said travel counter, said close travel memory and said open travel memory for controlling the motor to open and close the door, said controller including means operative to stop the motor to stop movement of the door when said count of said travel counter reaches said close travel count when closing the door, stop the motor to stop movement of the door when said count of said travel counter reaches said open travel count when opening the door; detect the motor speed from said electrical pulses of said rotation pulse generator, at least stop the motor to stop movement of the door when the detected motor speed indicates a closing motor torque greater than said selected closing torque limit when the motor is closing the door, and at least stop the motor to stop movement of the door when the detected motor speed indicates an opening motor torque greater than said selected opening torque limit when the motor is opening the door. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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46. An automatic door operator for controlling a motor coupled for closing and opening a door, said automatic door operator comprising:
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a rotation pulse generator coupled to a rotating shaft of the motor for producing electrical pulses corresponding to rotation of the shaft of the motor; a travel counter connected to said rotation pulse generator for counting said electrical pulses, said travel counter having a predetermined count range; a close travel memory for storing therein a close travel count corresponding to movement of the door to a fully closed position, said close travel count having said predetermined count range; an open travel memory for storing therein an open travel count corresponding to movement of the door to a fully opened position, said open travel count having said predetermined count range; a counter reset load means connected to said travel counter, said close travel memory and said open travel memory operative upon each initial application of electric power to said automatic door operator to set said travel count in said travel counter to a first predetermined number near the middle of said predetermined count range, set said close travel count in said close travel memory to a second predetermined number not greater than said first predetermined number, and set said open travel count in said open travel memory to a third predetermined number greater than said first predetermined number; a controller connected to said close travel memory and said open travel memory and operative to stop the motor to stop movement of the door when said count of said travel counter reaches said close travel count when closing the door, and stop the motor to stop movement of the door when said count of said travel counter reaches said open travel count when opening the door. - View Dependent Claims (47, 48, 49, 50, 51, 52, 53)
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Specification