Control system for opening or closing an opening-closing member

• US 5,483,133 A
• Filed: 03/25/1994
• Issued: 01/09/1996
• Est. Priority Date: 03/25/1993
• Status: Expired due to Fees

• Current Assignee: Mazda Motor Corporation
• Original Assignee: Mazda Motor Corporation
• Inventors: Takabe, Yasuhiro, Ueda, Koji, Hara, Toshihiro
• Primary Examiner(s): Shoop, Jr., William M.
• Assistant Examiner(s): Masih, Karen
• Application Number:
  US08/217,654
• Time in Patent Office: 655 Days
• Field of Search: 318/445, 318/434, 318/466, 318/458, 318/459, 318/265, 318/449
• US Class Current: 318/466
• CPC Class Codes: F16P 3/12 with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine F16P3/08 takes precedence
• 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 7/0854 responsive to rate of change of current, couple or speed, e.g. anti-kickback protection H02H7/0851 takes precedence

Abstract

A control system for opening or closing an opening-closing member when a foreign material is caught by the opening-closing member. The event that the opening-closing member catches the foreign material is decided on the basis of a driving state of a motor for driving the opening-closing member such as a power window. For example, the event that the event of catching the foreign material is decided when a driving acceleration or a driving velocity is less than a predetermined threshold X or Y, respectively. Each of the thresholds X and Y is set basically on the basis of the previous driving acceleration and velocity of the opening-closing member. The thresholds X and Y are corrected on the basis of a condition exerting an influence upon the driving state of the motor, for example, on the basis of a driving voltage or a resistance to a sliding movement of the opening-closing member.

Claims

1. A control system for opening or closing an opening-closing member, comprising:

a driving means for driving said opening-closing member;

a first detecting means for detecting a driving acceleration of said driving means and generating a first signal indicative of the driving acceleration;

a second detecting means for detecting a driving voltage of said driving means and generating a second signal indicative of the driving voltage;

a first memory means for receiving said signals and for storing a correlation between said driving acceleration and said driving voltage based on said signals;

a second memory means for storing a previous driving voltage supplied to said driving means;

an acceleration threshold determining means for determining an acceleration threshold as a function of said previous driving voltage stored by said second memory means, a current driving voltage detected by said second detecting means and said correlation stored by said first memory means; and

a decision means for deciding whether said opening-closing member has encountered a foreign material as a function of said driving acceleration detected by said first detecting means and said acceleration threshold.

4. A control system as claimed in claim 1, further comprising:

an ambient temperature detecting means for detecting an ambient temperature and generating a third signal indicative of the ambient temperature; and

an acceleration threshold correction means for receiving said third signal and varying said acceleration threshold as a function of the ambient temperature detected by said ambient temperature detecting means.

7. A control system as claimed in claim 4, wherein said acceleration threshold X is computed by formula as follows:

space="preserve" listing-type="equation">X={k1×

(E1-E2)×

f(T, E2)}×

dV1

where k1 is a correction coefficient in accordance with a resistance to the sliding movement of the opening-closing member;

E1 is a previous driving voltage;

E2 is a current driving voltage;

T is an ambient temperature;

dV1 is a previous driving acceleration; and

f is a function with T and E2 as parameters (f≦

1).

10. A control system as claimed in any one of claims 1 to 3, wherein said opening-closing member is opened when it is decided by said decision means that the foreign material is encountered by said opening-closing member.

11. A control system as claimed in claim 1, further comprising a correction means for correcting said acceleration threshold value on the basis of a predetermined resistance to the sliding movement of the opening-closing member.

2. A control system for opening or closing an opening-closing member, comprising:

a driving means for driving said opening-closing member;

a first detecting means for detecting a driving velocity of said driving means and generating a first signal indicative of the driving velocity;

a second detecting means for detecting a driving voltage of said driving means and generating a second signal indicative of the driving voltage;

a first memory means for receiving said signals and for storing a correlation between said driving velocity and said driving voltage based on said signals;

a second memory means for storing a previous driving voltage supplied to said driving means;

a velocity threshold determining means for determining a velocity threshold as a function of said previous driving voltage stored by said second memory means, a current driving voltage detected by said second detecting means and said correlation stored by said first memory means; and

a decision means for deciding whether said opening-closing member has encountered a foreign material as a function of said driving velocity detected by said first detecting means and said velocity threshold.

5. A control system as claimed in claim 2, further comprising:

an ambient temperature detecting means for detecting an ambient temperature and generating a third signal indicative of said ambient temperature; and

a velocity threshold correction means for receiving said third signal and varying said velocity threshold as a function of the ambient temperature detected by said ambient temperature detecting means.

8. A control system as claimed in claim 5, wherein said velocity threshold Y is computed by formula as follows:

space="preserve" listing-type="equation">Y={k1×

(E1-E2)×

f(T, E2)}×

V1

where k1 is a correction coefficient in accordance with a resistance to the sliding movement of the opening-closing member;

E1 is a previous driving voltage;

E2 is a current driving voltage;

T is an ambient temperature;

V1 is a previous driving velocity; and

f is a function with T and E2 as parameters (f≦

1).

12. A control system as claimed in claim 2, further comprising a correction means for correcting said velocity threshold value on the basis of a predetermined resistance to the sliding movement of the opening-closing member.

3. A control system for opening or closing an opening-closing member, comprising:

a driving means for driving said opening-closing member;

a first detecting means for detecting a driving acceleration of said driving means and generating a first signal indicative of the driving acceleration;

a second detecting means for detecting a driving voltage of said driving means and generating a second signal indicative of the driving voltage;

a third detecting means for detecting a driving velocity of said driving means and generating a third signal indicative of the driving voltage;

a first memory means for receiving said signals and for storing a correlation between said driving acceleration and said driving voltage based on said signals;

a second memory means for storing a previous driving voltage supplied to said driving means;

a third memory means for storing a correlation between said driving velocity and said driving voltage;

a first threshold determining means for determining an acceleration threshold as a function of said previous driving voltage stored by said second memory means, a current driving voltage detected by said second detecting means and said correlation stored by said first memory means;

a first decision means for deciding whether said opening-closing member has encountered a foreign material as a function of said driving acceleration detected by said first detecting means and said acceleration threshold;

a second threshold determining means for determining a velocity threshold as a function of said previous driving voltage stored by said second memory means, said current driving voltage detected by said second detecting means, and said correlation stored by said third memory means;

a second decision means for deciding whether said opening-closing member has encountered the foreign material as a function of said driving velocity detected by said third detecting means and said velocity threshold; and

a decision condition selecting means for making a decision by said first decision means when said driving velocity detected by said third detecting means is not constant and for making a decision by said second decision means when said driving velocity is constant.

6. A control system as claimed in claim 3, further comprising:

an ambient temperature detecting means for detecting an ambient temperature and generating a fourth signal indicative of the ambient temperature;

an acceleration threshold correction means for receiving said fourth signal varying said acceleration threshold as a function of the ambient temperature detected by said ambient temperature detecting means; and

a velocity threshold correction means for receiving said fourth signal and varying said velocity threshold as a function of the ambient temperature detected by said ambient temperature detecting means.

9. A control system as claimed in claim 6, wherein said acceleration threshold X and said velocity threshold Y are computed by formula as follows:

space="preserve" listing-type="equation">X={k1×

(E1-E2)×

f(T, E2)}×

dV1

space="preserve" listing-type="equation">Y={k1×

(E1-E2)×

f(T, E2)}×

V1

where k1 is a correction coefficient in accordance with a resistance to the sliding movement of the opening-closing member;

E1 is a previous driving voltage;

E2 is a current driving voltage;

T is an ambient temperature;

dV1 is a previous driving acceleration;

V1 is a previous driving velocity;

f is a function with T and E2 as parameters (f≦

1).

13. A control system as claimed in claim 3, further comprising:

a first correction means for correcting said acceleration threshold value on the basis of a predetermined resistance to the sliding movement of the opening-closing member and;

a second correction means for correcting said velocity threshold value on the basis of a predetermined resistance to the sliding movement of the opening-closing member.