Opening/closing control device

Patent metadata

Field	Value
Publication number	US-2018002968-A1
Application number	US-201715617262-A
Country	US
Kind code	A1
Filing date	Jun 8, 2017
Priority date	Jul 1, 2016
Publication date	Jan 4, 2018
Grant date	—

Abstract

A boundary position, which determines the range of the positions of the window within which trap prevention control is disabled, is set according to the sum of a first amount of rotation and a second amount of rotation. The first amount of rotation approximates a change, in a reference amount of rotation, that corresponds to a change in a detected voltage from a reference voltage. The second amount of rotation is set to a value that is smaller than the difference between a specific amount of rotation at a stop and the reference amount of rotation and is larger than the amount of variations in the reference amount of rotation.

First claim

What is claimed is:

1 . An opening/closing control device that controls an opening/closing operation of an opening/closing body by driving a motor, the device comprising:
a processor and a memory having program code stored therein, wherein when the processor executes the program code, the processor is configured into: a trap detecting unit configured to detect a trap of an object, the trap being caused by the opening/closing body; a rotation amount detecting unit configured to detect an amount of rotation of the motor; a voltage detecting unit configured to detect a voltage to be supplied to the motor; a position detecting unit configured to detect a position of the opening/closing body with respect to the position of the opening/closing body with the opening/closing body in a fully closed state, according to a change in a detected amount of rotation from a reference amount of rotation, the reference amount of rotation being the amount of rotation detected by the rotation amount detecting unit in the fully closed state; a motor control unit configured to perform trap prevention control when the trap detecting unit detects the trap, a rotation of the motor being reversed in the trap prevention control, if the position, detected by the position detecting unit, of the opening/closing body is more distant from the position of the opening/closing body in the fully closed state than a preset boundary position is, and to disable the trap prevention control if the detected position of the opening/closing body is closer to the position of the opening/closing body in the fully closed state than the boundary position is; and a boundary position setting unit configured to set the boundary position; wherein the boundary position setting unit sets the boundary position according to a sum of: a first amount of rotation having a value depending on a change in the voltage detected by the voltage detecting unit from a reference voltage, the reference voltage being a voltage detected by the voltage detecting unit in the fully closed state, the first amount of rotation approximating a change in the reference amount of rotation, the change corresponding to the change in the detected voltage from the reference voltage, and a second amount of rotation having a value depending on the detected voltage, the second amount of rotation being smaller than a difference between the reference amount of rotation and a specific amount of rotation at a stop, the specific amount of rotation being the detected amount of rotation at a position, the opening/closing body being stopped at the position by the trap prevention control because the trap of the object with a predetermined thickness has been detected, and being larger than an amount of variations in the reference amount of rotation.

2 . The opening/closing control device according to claim 1 , wherein the boundary position setting unit sets the boundary position according to the sum of
the first amount of rotation having a value obtained by multiplying the change in the detected voltage from the reference voltage by a predetermined proportionality coefficient, and the second amount of rotation having a value of a predetermined linear function, the detected voltage being used as a variable in the predetermined linear function.

3 . The opening/closing control device according to claim 2 , wherein if the detected amount of rotation is assumed to be reduced by an operation to close the opening/closing body and to be increased by an operation to open the opening/closing body,
a minimum value of a variation range of the reference amount of rotation is approximated as a first approximation function, the first approximation function being a linear function of the detected voltage, a maximum value of the variation range of the reference amount of rotation is approximated as a second approximation function, the second approximation function being a linear function of the detected voltage, and the predetermined proportionality coefficient is an intermediate value between a coefficient in the first approximation function and a coefficient in the second approximation function.

4 . The opening/closing control device according to claim 3 , wherein:
a minimum value of a variation range of the specific amount of rotation at a stop is approximated as a third approximation function, the third approximation function being a linear function of the detected voltage, and the predetermined linear function is equivalent to a half of a result obtained by subtracting the first approximation function from the third approximation function.

5 . The opening/closing control device according to claim 4 , wherein the position detecting unit detects a change in the detected amount of rotation from the reference amount of rotation in the most recent fully closed state, as the position of the opening/closing body.

6 . The opening/closing control device according to claim 5 , wherein the boundary position setting unit calculates a change in the detected voltage from the reference voltage in the most recent fully closed state, and sets the boundary position according to the sum of the first amount of rotation having the value depending on the change in the detected voltage, and the second amount of rotation.

7 . The opening/closing control device according to claim 6 , further comprising a torque detecting unit configured to detect a torque of the motor, wherein the trap detecting unit detects the trap according to the torque detected by the torque detecting unit.

8 . The opening/closing control device according to claim 1 , wherein the position detecting unit detects a change in the detected amount of rotation from the reference amount of rotation in the most recent fully closed state, as the position of the opening/closing body.

9 . The opening/closing control device according to claim 8 , wherein the boundary position setting unit calculates a change in the detected voltage from the reference voltage in the most recent fully closed state, and sets the boundary position according to the sum of the first amount of rotation having the value depending on the change in the detected voltage, and the second amount of rotation.

10 . The opening/closing control device according to claim 9 , further comprising a torque detecting unit configured to detect a torque of the motor, wherein the trap detecting unit detects the trap according to the torque detected by the torque detecting unit.

11 . The opening/closing control device according to claim 1 , wherein the boundary position setting unit calculates a change in the detected voltage from the reference voltage in the most recent fully closed state, and sets the boundary position according to the sum of the first amount of rotation having the value depending on the change in the detected voltage, and the second amount of rotation.

12 . The opening/closing control device according to claim 11 , further comprising a torque detecting unit configured to detect a torque of the motor, wherein the trap detecting unit detects the trap according to the torque detected by the torque detecting unit.

13 . The opening/closing control device according to claim 1 , further comprising a torque detecting unit configured to detect a torque of the motor, wherein the trap detecting unit detects the trap according to the torque detected by the torque detecting unit.

Assignees

• Alps Electric Co Ltd

Inventors

• Endo Shinichi
• Hayasaka Satoshi
• Sugita Takuya

Classifications

• B60J1/17

  vertically · CPC title

• E05F15/75

  responsive to the weight or other physical contact of a person or object · CPC title

• E05F15/41 Primary

  Detection by monitoring transmitted force or torque (E05F15/48 takes precedence); Safety couplings with activation dependent upon torque or force, e.g. slip couplings · CPC title

• E05Y2800/748

  end · CPC title

• E05Y2400/58

  Sensitivity setting or adjustment · CPC title