JPH08240071A - Method for determining catch detection range - Google Patents

Abstract

PURPOSE: To set a constant and accurate catch detection range at all times by measuring motor power voltage, upon arrival at a complete closing position, and making a correction for learning on the basis of a correlation between the value of the voltage and a dead zone. CONSTITUTION: A power window regulator circuit 30, upon judging that the upper end of window shield glass reaches a completely close position and a window shield glass elevator motor 26 is locked, measures the power voltage of a motor 26. A correction is, then, made for learning, on the basis of a correlation between a preliminarily stored power voltage value, and a dead zone from a reference position to a catch detection range, and a position for entering a dead zone corresponding to the measured voltage is thereby established. As a result, a constant and accurate catch detection range can always be determined.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for determining an entrapment detection range, and more particularly to a method for determining an entrapment detection range of window glass of an automobile.

[0002]

2. Description of the Related Art Conventionally, a power window regulator for an automobile has a power window regulator which is designed so that the window is stopped or reverses and descends when a large load is applied to the window rising force only in a predetermined partial area where a dangerous state occurs. It is known, and an example of it is SAIkai Sho 52-5681.
It is disclosed in Japanese Patent No.

In such a method of determining the entrapment detection range in the power window regulator, the closed position is set as the reference position. Further, to prevent erroneous detection of trapping, a trapping detection range is set from a position distant from the closing cut position by a predetermined distance, and the trapping non-detection range is between the trapping detection range and the closing cut position. In addition, this entrapment non-detection range is referred to as a dead zone.

[0004]

However, in this entrapment detection range determination method, the entrapment detection range is detected by a plurality of area sensors, which increases the cost. In order to improve this, it is conceivable to eliminate the area sensor and detect the entrapment detection range using the pulse signal of the window glass lifting motor, but in this case,
The torque of the window glass lifting motor changes as the power supply voltage of the power supply connected to the motor changes.
The closed position of the windshield changes. Therefore, the reference position changes when determining the entrapment detection range, and the entrapment detection range of the window glass cannot be accurately determined, and the entrapment detection range varies.

In view of the above facts, an object of the present invention is to obtain a pinch detection range determination method which can always determine a constant and accurate pinch detection range.

[0006]

According to a first aspect of the present invention, there is provided an entrapment detection range determining method for determining an entrapment detection range of a glass by using a pulse signal of a motor with a closed position of a moving range of a window glass as a reference position. , When measuring and correcting the reference position, the power supply voltage of the motor when the glass is located at the closed position is measured, and the power supply voltage value of the motor stored in advance and the dead zone from the reference position to the pinch detection range are detected. It is characterized in that a dead zone corresponding to the measured power supply voltage is set based on the correlation.

[0007]

According to the entrapment detection range determining method of the present invention as set forth in claim 1, even when the motor torque changes with the fluctuation of the power supply voltage and the closed position of the window glass, that is, the reference position changes, the power supply voltage is changed. Since the dead zone is set accordingly, the pinch detection range, which is the area excluding the dead zone, is always constant and accurately determined.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the method for determining the entrapment detection range of the present invention will be described with reference to FIGS.

In these figures, the arrow FR, which is shown as appropriate, indicates the front side of the vehicle and the arrow UP indicates the upper side of the vehicle.

As shown in FIG. 3, the window glass 10
Is fixed to channel 12, this channel 1
A slide rail 14 is provided at 2. A slide element such as a roller fixed to one end of the regulator arm 16 is engaged with the slide rail 14 so that the slide rail 14 can move right and left within the range of the slide rail 14.

The vicinity of the other end of the regulator arm 16 is pivotally supported by a holder 22 fixed to a door 20 by a pin 18. A driven gear 24 is fixed to the other end of the regulator arm 16, and the driven gear 24 is rotated by a window glass lifting motor 26.

With the above structure, when the window glass lifting motor 26 rotates, the driven gear 24 rotates, the regulator arm 16 rotates, and the window glass 10 moves up and down.

As shown in FIG. 2, the power window regulator circuit 30 of this embodiment includes a microcomputer 32, and the window glass lifting motor 26 includes a relay 34 and an output buffer 36 provided in the power window regulator circuit 30. It is connected to the microcomputer 32 via. Further, the well-known rotation sensors 38 and 40 equipped with a pulse encoder or the like are provided on the windshield glass lifting motor 26.
Individually installed.

The rotation sensors 38 and 40 are connected to the microcomputer 32 via a waveform shaping circuit 42 provided in the power window regulator circuit 30. The waveform shaping circuit 42 receives the output pulses of the rotation sensors 38 and 40, which are shown in FIG. 5A and are 90 ° out of phase with each other by one pulse for one rotation of the motor, and are shown in FIG. As shown, two pulses are output for one rotation of the motor.

As shown in FIG. 2, an elevator switch 44 for outputting a signal for raising and lowering the windshield 10 and a cancel switch 46 for stopping the raising and lowering of the windshield 10 are provided in the vehicle compartment. The elevating switch 44 and the cancel switch 46 are connected to the microcomputer 32 via an input buffer 48 provided in the power window regulator circuit 30.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG. As shown in FIG. 1, in the power window regulator circuit 30 of the present embodiment, when the closing operation is started, the window glass elevating motor 26 is driven, and the window glass 10 starts to rise, the rotation sensors 38, 40 are operated. Pulse signal is input to the microcomputer 32 via the waveform shaping circuit 42.

In step (hereinafter referred to as S) 100, the microcomputer 32 counts the pulse signal from the waveform shaping circuit 42 to determine whether the upper end of the windshield glass 10 is within the entrapment detection range. To do.

When it is determined in S100 that the upper end of the windshield glass 10 is within the entrapment detection range, it is determined in S102 whether or not the windshield glass 10 is entrapped.

If it is determined in S102 that the windshield glass 10 is sandwiching something, S1
In 04, the window glass raising / lowering motor 26 is stopped, and in S106, the window glass raising / lowering motor 26 is reversed to lower the window glass 10.

On the other hand, when it is determined in S100 that the upper end of the windshield glass 10 is not within the entrapment detection range, in S108, the windshield lifting motor 26 is driven based on the pulse signal from the waveform shaping circuit 42.
It is determined whether or not is locked.

If it is determined in S102 that the windshield glass 10 is not in a state of sandwiching something, the process returns to S100.

If it is determined in S108 that the window glass lifting motor 26 is not locked, S110
The window glass lifting motor 26 continues to rotate,
Continue the closing operation.

On the other hand, if it is determined in S108 that the windshield lifting motor 26 is locked, that is, if the upper end of the windshield glass 10 has reached the closed position, the power supply voltage of the windshield lifting motor 26 is determined in S112. To measure.

Subsequently, in S114, the window glass lifting motor 26 is stopped and the closing operation is completed.

Here, as shown in FIG. 4, when the power supply voltage of the window glass raising / lowering motor 26 is V1 volt, the reference position T1 is the position where the weather strip 50 is cut into the depth L1. However, when the power supply voltage of the windshield lifting / lowering motor 26 is V2 (V1 <V2) volts, the torque of the windshield lifting / lowering motor 26 becomes large, and thus the reference position T2 in this case is the depth L2 in the weather strip 50. (L1 <L2) The position is a bite.

Therefore, in S116, when the reference position is learned and corrected, the power supply voltage at the time when the windshield glass 10 is located at the closed positions (reference positions) T1 and T2 is measured, and the power supply voltage stored in advance is stored. Based on the correlation between the value and the dead zone from the reference position to the pinch detection range (FIG. 6), the position T3 that enters the dead zones S1 and S2 corresponding to the measured power supply voltage is set.

For this reason, when the windshield glass 10 is raised next time, in S100, when it is determined whether the upper end of the windshield glass 10 is within the pinch detection range, the power supply voltage is changed. The position T3 that enters the dead zones S1 and S2 is determined, and the distance S3 between the weather strip 50 and the position T3 that enters the dead zones S1 and S2 becomes constant.

As described above, in the entrapment detection range determining method of this embodiment, the position T3 where the windshield glass 10 enters the dead zones S1 and S2 does not change even if the power supply voltage of the window glass lifting motor 26 changes. Position T entering the weather strip 50 and the dead zones S1 and S2
The distance S3 from 3 does not change. That is, even if the motor torque changes with the fluctuation of the power supply voltage of the windshield glass elevating motor 26 and the reference positions T1 and T2 change, the windshield glass 10 has the dead zone S depending on the power supply voltage.
Since the position T3 for entering the positions S1 and S2 is set, the pinch detection range, which is a region excluding the dead zones S1 and S2 of the door opening, is always constant and accurately determined.

In the present embodiment, an example in which the entrapment detection range determining method of the present invention is applied to a power window regulator has been described, but the entrapment detection range determining method of the present invention can be applied to a regulator such as a sunroof. .

[0030]

According to the first aspect of the present invention, in the pinch detection range determining method for determining the pinch detection range of the glass by using the pulse signal of the motor and the closed position of the window movement range as the reference position, the reference position is set. Measure the power supply voltage of the motor when the glass is located at the closed position during learning correction, based on the correlation between the power supply voltage value of the motor stored in advance and the dead zone from the reference position to the pinch detection range, Since the dead zone corresponding to the measured power supply voltage is set, there is an excellent effect that the trapping detection range which is always constant and accurate can be determined.

[Brief description of drawings]

FIG. 1 is a flowchart showing a method for determining a trapping detection range according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a window regulator circuit to which the entrapment detection range determining method according to one embodiment of the present invention is applied.

FIG. 3 is a perspective view showing a window regulator to which the entrapment detection range determining method according to the embodiment of the present invention is applied.

FIG. 4 is an operation explanatory view of the entrapment detection range determining method according to the embodiment of the present invention.

FIG. 5A is an input signal of a waveform shaping circuit,
(B) is an output signal of the waveform shaping circuit.

FIG. 6 is a graph showing a correlation between a power supply voltage value and a dead zone.

[Explanation of symbols]

 10 window glass 26 window glass lift motor 30 power window regulator circuit 32 microcomputer 38 rotation sensor 40 rotation sensor 44 lift switch 46 cancel switch

Claims (1)

[Claims] 1. A pinch detection range determining method for determining a pinch detection range of a glass by using a pulse signal of a motor with a closed position of a window glass movement range as a reference position, and the glass is closed and closed when a reference position is learned and corrected. Measure the power supply voltage of the motor at the time of being located in the position, based on the correlation of the dead zone from the reference position to the sandwiching detection range and the power supply voltage value of the motor stored in advance, to the measured power supply voltage A method for determining an entrapment detection range, characterized in that a corresponding dead zone is set.