JPH1025963A - Power window switching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an error detection of catching and lower detection charges and lessen pains at the time of being caught by providing a parameter variation detecting means, a determination means, a threshold alteration means, a decision means and control means to the controller. SOLUTION: The indication of a vertical movement is given on a vehicle window by operating the knob 3a of an operation switch 3. The indication information of vertical movement is converted in an electrical signal by a knob switch 3b and Inputted in CPU via the input part 7 of a controller 6. In the next place, CPU operates to drive a motor 4 in terms of the inputted knob information via the output part 9. In addition, CPU 8 takes in a parameter value such as a motor electric current. Subsequently, on the bases of this, a decision is made whether the vehicle window catches foreign matters or not. When the decision of a catching state is made, the motor is stopped or reversed. Thus, a determination is carried out by an alteration of the parameter every constant period of time from its initiation. In this manner, an error detection of catching can be lessened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power window switch for a vehicle, and more particularly to a power window switch having a function of preventing a hand or the like from being pinched by a vehicle window.

[0002]

2. Description of the Related Art A pinch prevention function provided in a conventional vehicle-mounted power window switch device detects a current value of a motor for moving a vehicle window up and down and the like, and determines a current value at a present time and a current value based on the current value. Also, a difference from one current value before a predetermined time is obtained, and when this current difference is higher than a preset immovable entrapment detection threshold value, a state in which a hand or the like is interposed (hereinafter referred to as an entrapment state) ), And the motor is stopped or rotated in the reverse direction to prevent the hand or the like from feeling painful.

[0003]

However, when the power window device is driven while the vehicle is traveling on a rough road, the value of the current flowing through the motor fluctuates greatly up and down. Therefore, the current difference may accidentally exceed the detection threshold,
In the above-described determination method, the motor may be erroneously determined to be in the pinched state, and the motor may be stopped or rotated in the reverse direction. In order to prevent such erroneous detection, the detection threshold may be set to a high value. However, since the detection load for determining the entrapment state becomes high, pain is felt when the hand is actually nipped. The present invention has been made in order to solve the above-described problems, and there is a possibility that a state where the vehicle is traveling on a paved road or the like (hereinafter, referred to as a normal traveling state) and an erroneous road traveling state are erroneously detected. In the normal traveling state, the threshold value for detection of pinching is lowered, and the threshold value for detection of pinching is increased in the traveling state of rough roads, thereby preventing erroneous detection of pinching and detecting the load in the normal traveling state. It is an object of the present invention to provide a power window switch device which does not cause pain when a hand is caught by lowering the power.

[0004]

In order to achieve the above object, the present invention provides an operation switch for instructing vertical driving of a vehicle window, a motor for vertically driving a vehicle window, and information based on instruction information from the operation switch. A power window switch device having a controller for giving an operation command to the motor and controlling a motor operation by taking in a parameter change value such as a current of the motor, wherein the controller detects a parameter change value within a predetermined time. Value detection means, and compares the parameter change value with a predetermined rough road determination threshold value for determining whether the vehicle is in a normal traveling state or a rough road traveling state other than the normal traveling state. When the value is smaller than the threshold value, it is determined that the vehicle is traveling normally, and when the parameter change value is equal to or greater than the threshold value for determining a rough road, it is determined that the vehicle is traveling on a rough road. The judgment means, and when the judgment means judges that the vehicle is in the normal traveling state, lowers the entrapment detection threshold value for judging whether or not the pinching of the finger or the like has occurred in the vehicle window. When it is determined that there is a threshold value, the threshold value changing means for increasing the entrapment detection threshold value is compared with the parameter change value and the entrapment detection threshold value changed by the threshold value change means. When the parameter change value is equal to or greater than the entrapment detection threshold value, it is determined that the entrapment has not occurred. At this time, control means for stopping or reversely driving the motor is provided.

In the above configuration, a change in a parameter value such as a current value within a certain period of time is detected, and the parameter change value is compared with a predetermined threshold value for determining a rough road. When the threshold value is smaller than the threshold value, it is determined that the vehicle is in the normal running state, the threshold value for detection of entrapment is lowered, and it is determined whether the vehicle is in the entrapment state by comparing the lowered threshold value for entrapment detection with the parameter change value. to decide.
Therefore, in the normal traveling state, the entrapment detection threshold value is set to a low value, and it is possible to determine whether or not entrapment has occurred by comparing with the low entrapment detection threshold value. It can relieve pain felt by hands and the like. When the parameter change value is larger than the rough road determination threshold value, it is determined that the vehicle is traveling on a rough road, and the entrapment detection threshold value is set to a high value. It is possible to determine whether or not the vehicle is in a pinching state by comparing with the above, so that it is possible to reduce erroneous detection that is likely to occur in a rough road traveling state. Further, since it is possible to determine whether the vehicle is running on a rough road and the state of being pinched is the same as before, there is no need to change the system.

In the present invention, the threshold value for determining a rough road for determining whether the vehicle is traveling on a normal road or a rough road may be variable. In this configuration, the threshold value for determining a rough road can be changed according to the use condition, so that prevention of erroneous detection of entrapment during traveling on a rough road and reduction of the load at the time of detection of entrapment are properly balanced. Can be.

In the present invention, the time for detecting the parameter change value by the parameter change value detecting means may be variable. In this configuration,
Since the parameter detection time can be changed according to the use situation, the normal traveling state and the rough road traveling state can be more accurately determined.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of a power window switch device according to the present embodiment, and FIG. 2 is a block diagram of a control system of the power window switch device. The power window device 1 includes a controller 6 including a power window switch 3 for instructing the vehicle window 2 to move up and down.
And a motor 4 driven by the up / down instruction, and a driving device 5 for moving the vehicle window 2 up and down by the driving force of the motor 4
Consists of

When the user operates the knob 3a of the power window switch 3 to give an up / down instruction of the vehicle window 2, this up / down instruction information is converted into an electric signal by the knob switch 3b, and is input via the input unit 7 of the controller 6. Are input to the CPU 8. The CPU 8 drives the motor 4 via the output unit 9 based on the input knob information. Further, the CPU 8
Fetches a parameter value such as a motor current value, determines whether or not a foreign object is caught in the vehicle window 2 based on the parameter value.
Is stopped or reversed. The CPU 8 includes a parameter change value detection unit that detects a parameter change value, a determination unit that determines whether the vehicle is in a normal traveling state or a rough road traveling state based on the detected value, and a detection unit that detects entrapment based on the determination result of the determination unit. It comprises a changing means for changing the threshold value, a judging means for judging whether the jamming has occurred, and a control means for controlling the driving of the motor 4. The method for determining whether the vehicle is in the normal traveling state or the rough road traveling state by the CPU 8 and the method for determining whether or not the vehicle is in the pinching state will be described in detail below.

FIG. 3 is a diagram showing changes in parameter values of a vehicle equipped with the power window switch device when the power window switch device is operated in a normal running state, and FIG. 4 is a diagram showing the power window switch device in a rough road running state. FIG. 7 is a diagram showing a change in parameter value when the is operated. As shown in FIG. 3, the power window switch is
When N is set, the parameter value temporarily increases and then shows a constant value. When a hand or the like is pinched, the parameter value rises rapidly. When it is determined that pinching has occurred, an ascending stop signal for stopping the ascending of the vehicle window is transmitted, and then the motor reverses, so that the parameter value decreases. On the other hand, as shown in FIG.
Although the parameter value increases even in the rough road running state, the swing width of the parameter value in the rough road running state is smaller than the swing width of the parameter value in the sandwiching state.

As described above, the waveforms of the parameter values in the pinched state and the rough road running state are similar in that the parameter value rises sharply. The motor may be erroneously determined to be in a state, or the motor may be stopped or reversely rotated. When the threshold value of the detection parameter is high, the detection load for judging the entrapment state is large.

The power window switch device 1 according to this embodiment detects a parameter change value during a predetermined time t0,
By comparing this parameter change value with a threshold for rough road determination, it is determined whether the vehicle is in a normal traveling state or a rough road traveling state,
By lowering the threshold for pinch detection during normal driving, and increasing the threshold for pinch detection during rough road driving, erroneous detection on rough roads is prevented, and the load detected during pinching is reduced. It lowers.

A method of determining the normal running state and the rough road running state by the power window switch device 1 and a method of determining the pinching state will be described with reference to a time chart of FIG. When the operator turns on the switch 3 in the direction in which the vehicle window 2 rises, the parameter values such as the current value temporarily rise, but thereafter become stable. The CPU 8 waits for a certain period of time (t0) after the temporary rise in the parameter value has calmed down.
The measurement of the parameter change value in the parentheses) is started. This measurement is performed at predetermined intervals. As shown in the figure, if the change in the parameter value within the first fixed time (t0) is very small and smaller than the rough road determination threshold value, it is determined that the vehicle is in the normal traveling state at time a, and the entrapment is detected. Gradually lower the threshold. When it is determined that the parameter value greatly changes within a certain time period (t0) and exceeds a threshold value for determining a rough road, it is determined that the vehicle is traveling on a rough road at time b, and the pinch detection is performed. Raise the threshold for use. This can prevent erroneous detection in a rough road traveling state. Next, when the vehicle leaves the rough road and changes in parameter values within a certain period of time (t0) become very small, it is determined that the vehicle is in a normal traveling state at time d, and the threshold for detection of entrapment is lowered again. . After that, if a finger or the like is pinched in the car window, the parameter value greatly increases,
When this parameter value becomes equal to or greater than the entrapment detection threshold value at time e, it is determined that entrapment has occurred, and the motor is reversed. Since the entrapment is generated with the threshold value lowered, the entrapment detection load is reduced.

Next, the operation of the CPU 8 of the power window switch device 1 according to the present embodiment for determining the normal traveling state and the rough road traveling state and the operation for determining the pinched state will be described.
This will be described with reference to the flowchart of FIG. When the switch 3 of the power window switch device 1 is turned on by a user's operation (S1), an initial value is substituted for a pinch detection threshold (S2). Next, the power window switch device 1 measures a parameter change value X within a predetermined time (t0) (S3), and compares the parameter change value X with a rough road determination threshold value (S4). As a result, it is possible to determine the normal traveling state and the rough road traveling state. If the parameter change value X is smaller than the rough road determination threshold (NO in S4), it is determined that the vehicle is in the normal traveling state, and the entrapment detection threshold is lowered (S5). On the other hand, if the parameter change value X is greater than or equal to the rough road determination threshold value (YES in S4), it is determined that the vehicle is traveling on a rough road, and the entrapment detection threshold value is increased (S8). next,
The parameter change value X is compared with the changed entrapment detection threshold value (S6). If the parameter change value X is smaller than the entrapment detection threshold value (NO in S6), it is determined that the entrapment state is not established. (S7). If the parameter change value X is greater than or equal to the entrapment detection threshold value (YES in S6), it is determined that the entrapment state is present (S9), and the motor 4 is stopped or reversely rotated (S1).
0).

As described above, before the jamming detection is performed, the normal running state and the rough road running state are determined, and when the rough road running state is determined, the jamming detection threshold is increased. Occasionally, erroneous detection of occurrence of pinching is reduced. Further, since the pinch detection threshold value in the normal running state can be set lower than before, the detection load in the normal running state can be reduced, and the pain when pinched can be reduced. In addition, by setting the threshold for detecting a rough road and the time for detecting a parameter change value to be appropriately changeable by a user according to the use environment, a more appropriate entrapment detection operation can be performed. it can. Needless to say, when the vehicle window 2 has risen to just before closing completely, the pinch detection operation is not performed so that the vehicle window 2 can be completely closed.

[0016]

As described above, according to the present invention, when the variation amount of the parameter at a fixed time interval from the start is smaller than the threshold value for determining a rough road, it is determined that the vehicle is in the normal traveling state, and the detection of the pinch is performed. The threshold value is gradually lowered, and when the variation of the parameter every predetermined time is equal to or greater than the threshold value for rough road determination, it is determined that the vehicle is traveling on a rough road, and the threshold value for pinch detection is increased. . Therefore, when the vehicle is traveling on a rough road, the detection is performed based on the pinch detection threshold value that is high, so that it is possible to reduce erroneous pinch detection. In addition, in the normal running state, since the detection is performed using the low value of the pinch detection threshold value, the detection load can be reduced, and the pain felt when a finger is pinched can be reduced. . Further, since it is possible to determine the normal traveling state and the rough road traveling state with the same configuration as before, there is no need to change the system.

Further, according to the present invention, by making the parameter threshold variable, the threshold can be changed in accordance with the use condition or the like, whereby the pinching state can be determined more accurately. In addition, it is possible to minimize the load at the time of detection of entrapment.

Further, according to the present invention, the detection time of the parameter change value is made variable so that the threshold value is changed in accordance with the use condition or the like, so that the normal running state and the rough road running state can be more accurately determined. Can be determined.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a power window switch device according to an embodiment of the present invention.

FIG. 2 is a block diagram of a control system of the power window switch device according to the embodiment of the present invention.

FIG. 3 is a diagram illustrating a change in parameters when an object is pinched when the vehicle window is raised in a normal running state.

FIG. 4 is a diagram showing how parameters change in a rough road traveling state.

FIG. 5 is a time chart showing how a parameter value and a pinch detection threshold change.

FIG. 6 is a flowchart illustrating a determination operation of a pinching state and a method of determining a normal driving state and a rough road driving state in the power window switch device according to the embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Power window switch device 2 Vehicle window 3 Power window switch (operation switch) 4 Motor 8 CPU (controller; parameter change detection means,
Judgment means, parameter change means, judgment means, control means)

Claims (3)

[Claims] An operation switch for instructing vertical driving of a vehicle window, a motor for vertically driving a vehicle window, an operation command given to the motor based on instruction information from the operation switch, and a motor current and the like for the motor. A power window switch device comprising: a controller that takes in a parameter change value and controls a motor operation; wherein the controller includes: a parameter change value detection unit that detects the parameter change value within a predetermined time; When the parameter change value is smaller than the threshold for determining a rough road, the threshold value is compared with a threshold for determining a rough road for determining whether the vehicle is in a traveling state or a rough road other than the normal travel. Determining means for determining that the vehicle is traveling on a rough road when the parameter change value is equal to or greater than the threshold value for determining a rough road; When it is determined that the vehicle is in the normal traveling state by the determining means, the threshold for detecting pinching is determined to determine whether or not a finger or the like has caught in the vehicle window. When it is determined, the threshold value changing means for increasing the entrapment detection threshold value, and comparing the parameter change value with the entrapment detection threshold value changed by the threshold value change means, the parameter change When the value is smaller than the entrapment detection threshold, it is determined that the state is not the entrapment state, and when the parameter change value is equal to or more than the entrapment detection threshold,
A power window switch device comprising: a judging means for judging the occurrence of jamming; and a control means for stopping or reversing the driving of the motor when the judging means judges the occurrence of jamming. 2. The power window switch device according to claim 1, wherein a rough road determination threshold value for determining whether the vehicle is running on a normal road or on a rough road is variable. 3. The power window switch device according to claim 1, wherein the time for detecting the parameter change value by the parameter change value detection means is variable.