Trapping detection device of opening/closing member

• US 7,038,413 B2
• Filed: 06/27/2003
• Issued: 05/02/2006
• Est. Priority Date: 06/28/2002
• Status: Active Grant

• Current Assignee: Aisin Seiki Co., Ltd. (Aisin Corp.)
• Original Assignee: Aisin Seiki Co., Ltd. (Aisin Corp.)
• Inventors: Kikuta, Takashi, Tanoi, Tsutomu, Onozawa, Satoru
• Primary Examiner(s): DUDA, RINA I
• Application Number:
  US10/607,210
• Publication Number:
  US 20040065498A1
• Time in Patent Office: 1,040 Days
• Field of Search: 318/280, 318/282, 318/286, 318/466, 318/468, 318/443, 318/445, 318/471, 49/26, 49/28
• US Class Current: 318/443
• CPC Class Codes: E05F 15/40 Safety devices, e.g. detection of obstructions or end positions
• CPC Class Codes: E05Y 2900/542 Roof panels
• CPC Class Codes: G05B 9/02 electric

Abstract

A trapping detection device of an opening/closing member includes a motor, a motor speed detection device, a control device, a voltage detection device for detecting a drive voltage applied to the motor, an actual speed decision device for deciding the actual speed of a rotation of the motor, an estimated speed calculation device for calculating the estimated speed of the rotation of the motor based on the drive voltage, an estimated speed storage device for storing the estimated speed for a predetermined time, an estimated speed correction device for correcting the estimated speed based on a difference between the actual speed and the estimated speed obtained before the predetermined time, a trapping determination device for determining the trapping based on a change state of a difference between the estimated speed being corrected and the actual speed.

Claims

1. A trapping detection device of an opening/closing member, comprising:

a motor for actuating the opening/closing member in an opening/closing direction;

a speed detection means for detecting a rotation state of the motor;

a control means for detecting the trapping during an operation of the opening/closing member based on an information sent from the speed detection means and for driving the motor in a reverse direction when the trapping is detected;

a voltage detection means for detecting a drive voltage applied to the motor for driving the motor;

an actual speed decision means for deciding the actual speed of a rotation of the motor by the speed detection means;

an estimated speed calculation means for calculating the estimated speed of the rotation of the motor based on the drive voltage;

an estimated speed storage means for storing the estimated speed for a first predetermined time;

an estimated speed correction means for correcting the estimated speed based on a difference between the actual speed and the estimated speed obtained before the first predetermined time;

a trapping determination means for determining the trapping in the opening/closing member based on a change state of a difference between the estimated speed being corrected and the actual speed.

2. A trapping detection device of an opening/closing member according to claim 1, wherein the trapping determination means determines the trapping state when the difference between the estimated speed being corrected and the actual speed exceeds a first predetermined threshold value.

3. A trapping detection device of an opening/closing member according to claim 2, wherein the trapping determination means includes a high-pass filter for filtering based on the difference between the estimated speed being corrected and the actual speed and determines the trapping state when a filtered value after passing through the high-pass filter exceeds a second predetermined threshold value.

4. A trapping detection device of an opening/closing member according to claim 3, wherein the speed detection means includes a motor rotation sensor for outputting a pulse signal synchronized to the rotation of the motor to the control means.

5. A trapping detection device of an opening/closing member according to claim 4, wherein the actual speed decision means detects the actual speed of the rotation of the motor based on a number of a rising edge or a falling edge of the pulse output from the motor rotation sensor detected within a predetermined time period.

6. A trapping detection device of an opening/closing member according to claim 5, wherein the difference between the actual speed and the estimated speed obtained before the first predetermined time is applied to correct the estimated speed when a second predetermined time is elapsed after the drive voltage is applied to the motor.