Door operator for controlling a door and method of same
OwnerBrian Hass, Eric Dubeinventors
Life of this patent
Estimating the term…
Abstract
A door operator for controlling operation of a door, the door operator having a motor to open the door against a spring force, the door operator further comprising a door position sensor for transmitting a signal indicative of door position; and among other things, calculates a door moment of inertia based on a net torque and the time for the door to reach a predetermined angle from the closed position. Also provided is a door operator that compares door speed to a desired door speed based on a door speed-position profile and generates a door speed error signal and minimizes the door speed error signal by adjusting the braking load resulting from charging a chargeable battery using the motor as a generator.
Claims10
A door operator for controlling operation of a door, the door operator having a motor to open the door against a spring force, said door operator further comprising:
- a door position sensor for transmitting a signal indicative of door position;
- and
- a controller for:
- controlling a motor current to generate a predetermined motor force to open the door to a predetermined angle;
- receiving the signal from the door position sensor and determining a door position and a door speed based on the signal;
- measuring the time for the door to reach the predetermined angle from a closed position;
- measuring the current to hold the door at the predetermined angle;
- converting the measured current to an equivalent force of the motor acting on the spring, which represents the spring force;
- determining a first torque value acting on the door based on the spring force;
- determining a second torque value acting on the door based on the predetermined motor force to open the door to the predetermined angle;
- subtracting the first torque value from the second torque value to determine a net torque acting on the door;
- and
- calculating a door moment of inertia based on the net torque and the time for the door to reach the predetermined angle from the closed position.
A door operator for controlling operation of a door, the door operator having a motor to open the door against a spring force, said door operator further comprising:
- a door position sensor for transmitting a signal indicative of door position;
- and
- a controller for:
- opening the door to a first position at a predetermined angle;
- measuring the current to hold the door at the predetermined angle;
- converting the measured current to an equivalent force of the motor acting on the spring, which represents the spring force;
- determining a torque value acting on the door based on the spring force;
- releasing the door to a second position at a predetermined angle
- measuring the time for the door to reach the second position at a predetermined angle
- calculating a door moment of inertia based on the torque applied and the time for the door to reach the second position at a predetermined angle.
A door operator for controlling operation of a door, the door operator configured to operate in a manual mode wherein a user provides opening power or in a powered mode using a motor for converting electrical energy stored in a chargeable battery to open the door and to act as a braking load to control door closing speed when charging the chargeable battery in a generator mode during door closing, said operator further comprising:
- a nonvolatile door position sensor for transmitting a signal indicative of door position;
- and
- a controller for:
- receiving the signal from the nonvolatile door position sensor;
- determining the door position and a door speed;
- comparing the door speed to a desired door speed based on a door speed-position profile and generating a door speed error signal;
- minimizing the door speed error signal by adjusting the braking load resulting from charging the chargeable battery using the motor as a generator.
Dependencies are inferred from the claim text.