PINCH DETECTION APPARATUS FOR OPENING-AND-CLOSING MEMBER, AND OPENING-AND-CLOSING MEMBER APPARATUS

• US 20140239867A1
• Filed: 01/09/2014
• Published: 08/28/2014
• Est. Priority Date: 02/28/2013
• Status: Active Grant

• Current Assignee: Aisin Seiki Co., Ltd. (Aisin Corp.)
• Original Assignee: Aisin Seiki Co., Ltd. (Aisin Corp.)
• Inventors: BESSHO, Nobuyasu, Maeda, Toshiro, Yuasa, Daisuke
• Granted Patent: US 9,294,031 B2
• Time in Patent Office: Days
• US Class Current: 318/466
• CPC Class Codes: E05F 15/40 Safety devices, e.g. detection of obstructions or end positions
• CPC Class Codes: E05F 15/41 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 Class Codes: E05Y 2800/414 against high or low temperatures
• CPC Class Codes: E05Y 2900/50 for vehicles
• CPC Class Codes: H02H 7/0851 for motors actuating a movable member between two end positions, e.g. detecting an end position or obstruction by overload signal
• CPC Class Codes: H02H 7/0852 directly responsive to abnormal temperature by using a temperature sensor in a control circuit H02H7/0833
• CPC Class Codes: H02H 7/0858 by reversing, cycling or reducing the power supply to the motor
• CPC Class Codes: H02P 25/06 Linear motors
• CPC Class Codes: H02P 29/032 Preventing damage to the motor, e.g. setting individual current limits for different drive conditions

Abstract

A pinch detection apparatus for an opening-and-closing member actuated by a motor, the pinch detection apparatus includes a reference data storage portion calculating load data on the basis of a rotation speed of the motor and an environmental temperature, the reference data storage portion storing the load data and the environmental temperature as reference load data and reference temperature data, respectively, a drive load calculation portion calculating drive load data, and a pinch determination portion configured to determine an occurrence of pinch on the basis of a comparison result obtained by comparing a difference between the reference load data and the drive load data with a threshold, the pinch determination portion configured to correct a relative relation between the difference between the reference load data and the drive load data, and the threshold on the basis of a relative relation between a reference temperature and a drive temperature.

Claims

1. A pinch detection apparatus for an opening-and-closing member actuated by a motor, the pinch detection apparatus comprising:

a reference data storage portion calculating load data on the basis of a rotation speed of the motor and an environmental temperature which are obtained in a case where a closing operation of the opening-and-closing member is performed at a predetermined time, the reference data storage portion storing the load data and the environmental temperature as reference load data and reference temperature data, respectively;

a drive load calculation portion calculating drive load data on the basis of the rotation speed of the motor and the environmental temperature which are obtained in a case where the closing operation of the opening-and-closing member is performed after the reference load data is stored; and

a pinch determination portion configured to determine an occurrence of pinch on the basis of a comparison result obtained by comparing a difference between the reference load data and the drive load data with a threshold set in order to determine the pinch at the opening-and-closing member, the pinch determination portion configured to correct a relative relation between the difference between the reference load data and the drive load data, and the threshold on the basis of a relative relation between a reference temperature which corresponds to the reference temperature data and a drive temperature which corresponds to the environmental temperature obtained at the closing operation of the opening-and-closing member after the reference load data is stored.

2. The pinch detection apparatus according to claim 1, wherein the predetermined time corresponds to a time when a predetermined condition is established at the motor.

3. The pinch detection apparatus according to claim 1, wherein the pinch determination portion is configured to correct the threshold on the basis of the relative relation between the reference temperature and the drive temperature.

4. The pinch detection apparatus according to claim 2, wherein the pinch determination portion is configured to correct the threshold on the basis of the relative relation between the reference temperature and the drive temperature.

5. The pinch detection apparatus according to claim 3, wherein a correction amount at the correction of the threshold is defined as a positive function relative to a change from the reference temperature to the drive temperature.

6. The pinch detection apparatus according to claim 4, wherein a correction amount at the correction of the threshold is defined as a positive function relative to a change from the reference temperature to the drive temperature.

7. The pinch detection apparatus according to claim 1, wherein a comparison processing at the pinch determination portion is invalidated in a case where a difference between the reference temperature and the drive temperature is not within a predetermined range.

8. The pinch detection apparatus according to claim 1, wherein the pinch determination portion is configured to correct the drive load data on the basis of the relative relation between the reference temperature and the drive temperature.

9. The pinch detection apparatus according to claim 8, wherein a correction amount at the correction of the drive load data is defined as a negative function relative to a change from the reference temperature to the drive temperature.

10. The pinch detection apparatus according to claim 1, wherein the reference data storage portion is configured to update the reference load data at a predetermined timing.

11. The pinch detection apparatus according to claim 10, wherein in a case where the closing operation of the opening-and-closing member, which is performed after the reference load data is stored, ends without detecting the occurrence of the pinch and in a case where a predetermined condition is established at the closing operation, the drive load data which is obtained at the closing operation is rewritten as new reference load data.

12. An opening-and-closing member apparatus comprising:

an opening-and-closing member;

a motor;

a rotation speed detection portion detecting a rotation speed of the motor; and

a pinch detection apparatus actuated by the motor, the pinch detection apparatus comprising;

a reference data storage portion calculating load data on the basis of a rotation speed of the motor and an environmental temperature which are obtained in a case where a closing operation of the opening-and-closing member is performed at a predetermined time, the reference data storage portion storing the load data and the environmental temperature as reference load data and reference temperature data, respectively;

a drive load calculation portion calculating drive load data on the basis of the rotation speed of the motor and the environmental temperature which are obtained in a case where the closing operation of the opening-and-closing member is performed after the reference load data is stored; and

a pinch determination portion configured to determine an occurrence of pinch on the basis of a comparison result obtained by comparing a difference between the reference load data and the drive load data with a threshold set in order to determine the pinch at the opening-and-closing member, the pinch determination portion configured to correct a relative relation between the difference between the reference load data and the drive load data, and the threshold on the basis of a relative relation between a reference temperature which corresponds to the reference temperature data and a drive temperature which corresponds to the environmental temperature obtained at the closing operation of the opening-and-closing member after the reference load data is stored.