JP3484887B2 - Power window switch device - Google Patents

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art A conventional anti-trap function provided in a vehicle-mounted power window switch device detects a current value of a motor for moving a vehicle window up and down, and a current value at the present time and a current value from the current time. Also obtains a difference from one current value before a predetermined time, 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 entrapped (hereinafter referred to as an entrapment state ), The motor is stopped or rotated in the reverse direction to prevent the hand from feeling pain.

[0003]

However, when the power window device is driven while the vehicle is running on a rough road, the value of the current flowing through the motor fluctuates largely up and down. Therefore, the current difference may accidentally exceed the detection threshold,
In the determination method as described above, the motor may be stopped or reversely rotated by erroneously determining that the pinch state is present. In order to prevent such erroneous detection, the detection threshold value may be set to a high value. However, since the detection load for the determination of the pinched state becomes high, pain is actually felt when the hand is actually pinched. The present invention has been made to solve the above-mentioned problems, and there is a possibility of erroneously detecting a traveling state on a paved road or the like (hereinafter referred to as a normal traveling state) and a traveling state on a bad road. By distinguishing the condition and lowering the trapping detection threshold in the normal driving condition and raising the trapping detection threshold in the bad driving condition, erroneous detection of trapping can be prevented and the detection load in the normal driving condition can be prevented. An object of the present invention is to provide a power window switch device in which the user does not feel pain when his hands are pinched by lowering the height.

[0004]

In order to achieve the above object, the present invention is based on an operation switch for instructing up and down driving of a vehicle window, a motor for up and down driving the vehicle window, and instruction information from the operation switch. In a power window switch device that includes a controller that gives an operation command to a motor and that controls a motor operation by taking in a parameter change value such as a motor current, the controller is a parameter change that detects the parameter change value within a certain period of time. The value detection means is compared with a parameter change value and a predetermined threshold value for determining a bad road for determining whether the vehicle is in a normal running state or a bad road running state other than the normal running state, and the parameter change value is for a bad road determination. When it is smaller than the threshold value, it is judged as a normal driving state, and when the parameter change value is equal to or higher than the threshold value for bad road judgment, it is judged as a bad driving state. When the judgment means determines that the vehicle is in a normal traveling state, the trapping detection threshold value for determining whether or not a finger or the like is caught in the car window is lowered, and the determination means determines whether the vehicle is traveling on a rough road. When it is determined that there is an entrapment detection 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 changing means to detect the entrapment of the parameter change value. When the parameter change value is equal to or greater than the entrapment detection threshold value, it is determined that entrapment has occurred, and when the parameter change value exceeds the entrapment detection threshold value, the entrapment is determined to occur. At this time, a control means for stopping the driving of the motor or reversing the motor is provided.

In the above structure, a change in a parameter value such as a current value is detected within a certain period of time, and this parameter change value is compared with a predetermined threshold value for determining a bad road, and the parameter change value is used for determining a bad road. When it is smaller than the threshold value, it is determined that the vehicle is in the normal running state, the threshold value for entrapment detection is lowered, and whether the entrapment state is determined by comparing the lowered entrapment detection threshold value with the parameter change value. to decide.
Therefore, in the normal running state, the trapping detection threshold value is set to a low value, and it is possible to determine whether the trapping occurs or not by comparing with the low trapping detection threshold value, so that the trapping detection load is small. It can relieve the pain in your hands. When the parameter change value is larger than the rough road determination threshold value, it is determined that the vehicle is running on a rough road, and the trapping detection threshold value is set to a high value. Since it is possible to determine whether or not the vehicle is in the trapped state by comparing with, it is possible to reduce erroneous detection that tends to occur in a bad road traveling state. In addition, since it is possible to determine whether the vehicle is running on a rough road or a trapped state with the same configuration as before, it is not necessary to change the system.

Further, the present invention may be one in which the threshold value for determining a bad road for distinguishing the normal running state or the bad road running state is variable. In this configuration, since the threshold value for bad road determination can be changed according to the usage condition, it is possible to properly balance the prevention of erroneous detection of trapping during traveling on a rough road and the reduction of load at the time of detection of trapping. You can

Further, according to 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, it is possible to more accurately determine the normal traveling state and the rough road traveling state.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION 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 this power window switch device. The power window device 1 includes a controller 6 including a power window switch 3 for instructing up and down of a vehicle window 2.
And a motor 4 driven by the up / down instruction, and a drive device 5 for vertically moving the vehicle window 2 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, the up / down instruction information is converted into an electric signal by the knob switch 3b, and is input via the input section 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. Furthermore, CPU8
Takes in a parameter value such as a motor current value, and based on this, judges whether or not there is a state in which a foreign object is caught in the car window 2.
Drive is stopped or reversed. The CPU 8 includes a parameter change value detecting means for detecting a parameter change value, a judging means for judging whether the vehicle is in a normal traveling state or a rough road traveling state based on the detected value, and for trapping detection based on a determination result of the determining means. It comprises a changing means for changing the threshold value, a judging means for judging whether entrapment has occurred, and a control means for controlling the drive of the motor 4. The method of determining whether the vehicle is in the normal traveling state or the rough road traveling state and the method of determining whether the vehicle is in the trapped state by the CPU 8 will be described in detail below.

FIG. 3 is a diagram showing changes in parameter values when the power window switch device is operated in a normal running state of a vehicle equipped with the power window switch device, and FIG. 4 is a power window switch device in a rough road running state. It is a figure which shows the change of the parameter value at the time of operating. As shown in Fig. 3, set the power window switch to O
When set to N, the parameter value temporarily rises and then shows a constant value. When a pinch of a hand or the like occurs, the parameter value sharply increases. When it is determined that the trapping has occurred, an ascending stop signal for stopping the ascending of the vehicle window is transmitted, and the motor is then reversed, so that the parameter value decreases. On the other hand, as shown in FIG.
Although the parameter value rises even in the rough road traveling state, the fluctuation range of the parameter value in the rough road traveling state is smaller than the fluctuation range of the parameter value in the pinched state.

As described above, the waveforms of the parameter values in the trapped state and the rough road traveling state are similar in that the parameter value sharply rises. Therefore, when the threshold value of the detection parameter is low, the trapped value is trapped during the rough road traveling. The motor may be erroneously determined to be in the state and the motor may be stopped or rotated in the reverse direction. In addition, when the threshold value of the detection parameter is high, the detection load for the determination of the trapped state is large, and therefore the user feels pain when the hand is actually caught.

The power window switch device 1 according to the present embodiment detects a parameter change value during a constant time t0,
By comparing this parameter change value with the rough road determination threshold value, it is possible to identify whether the vehicle is in a normal running state or a rough road
By reducing the trapping detection threshold value during normal driving conditions and raising the trapping detection threshold value during rough driving conditions, erroneous detection in bad driving conditions can be prevented and the detection load during trapping conditions can be prevented. Is to lower.

A method of determining the normal traveling state and the rough road traveling state and a method of determining the trapped state by the power window switch device 1 will be described with reference to the time chart of FIG. When the operator turns on the switch 3 in the direction in which the vehicle window 2 rises, the parameter value such as the current value temporarily rises, but becomes stable thereafter. The CPU 8 waits for a certain time (t0
The measurement of the parameter change value in () is started. This measurement is performed every predetermined period. As shown in the figure, if the change in the parameter value within the first fixed time (t0) is small and smaller than the rough road determination threshold value, it is determined that the vehicle is in the normal running state at time a, and the trapping detection is performed. Gradually lower the threshold. When it is measured that the parameter value greatly changes after that for a certain period of time (t0) and is equal to or more than the threshold value for bad road determination, it is determined that the vehicle is running on a bad road at time b, and trapping detection is performed. Increase the threshold for use. As a result, it is possible to prevent erroneous detection in a bad road traveling state. Next, if the change in the parameter value within a certain time (t0) after leaving the bad road is slight, it is determined that the vehicle is in the normal running state at time d, and the trapping detection threshold value is lowered again. . If fingers or the like are caught in the car window after that, the parameter value will rise significantly,
When the parameter value becomes equal to or larger than the threshold value for detecting the entrapment at time e, it is determined that entrapment has occurred and the motor is rotated in the reverse direction. Since the occurrence of trapping is performed with the threshold value lowered, the trapping detection load becomes small.

Next, the operation of the CPU 8 of the power window switch device 1 according to the present embodiment to determine the normal traveling state and the rough road traveling state and the operation of determining the sandwiched 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 the user's operation (S1), the initial value is substituted for the trapping detection threshold value (S2). Next, the power window switch device 1 measures the parameter change value X within a fixed time (t0) (S3), and compares this parameter change value X with the rough road determination threshold value (S4). As a result, it is possible to distinguish between the normal traveling state and the rough road traveling state. When the parameter change value X is smaller than the rough road determination threshold value (NO in S4), it is determined that the vehicle is in the normal running state, and the trapping detection threshold value is lowered (S5). On the other hand, when 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 running on a rough road, and the trapping 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. Yes (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).

In this way, the normal running state and the bad road running state are discriminated before the trapping is detected, and when the bad road running state is determined, the trapping detection threshold value is raised. Occasionally, erroneous detection of occurrence of entrapment is reduced. Further, since the trapping detection threshold value in the normal traveling state can be set lower than ever, the detection load in the normal traveling state can be reduced and the pain at the time of being caught can be alleviated. In addition, the threshold value for rough road determination and the time for detecting the parameter change value can be appropriately changed by the user according to the use environment, etc., so that a more appropriate pinch detection operation can be performed. it can. Needless to say, the trapping detection operation is not performed so that the vehicle window 2 can be completely closed when the vehicle window 2 is lifted just before the vehicle window 2 is completely closed.

[0016]

As described above, according to the present invention, when the fluctuation amount of the parameter at every constant time from the start is smaller than the threshold value for bad road judgment, it is judged that the vehicle is in the normal running condition and the pinch detection is performed. The threshold value is gradually decreased, and when the amount of parameter fluctuation at constant time intervals is equal to or greater than the rough road determination threshold value, it is determined that the vehicle is running on a bad road and the threshold value for pinching detection is increased. . Therefore, when the vehicle is traveling on a rough road, the detection is performed using the trapping detection threshold value that has become a high value, which can reduce false trapping detection. Further, in the normal running state, since the detection is performed by the trapping detection threshold value that has become a low value, it is possible to reduce the detection load, and it is possible to reduce the pain felt when the fingers are pinched. . Further, since it is possible to discriminate between 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 value can be changed in accordance with the usage situation and the like, whereby the pinching state can be determined more accurately. Further, it is possible to reduce the load when detecting entrapment as much as possible.

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 usage condition, etc., so that the normal traveling state and the rough road traveling state can be more accurately determined. Can be determined.

[Brief description of 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 showing how the parameters change when an object is sandwiched when the vehicle window rises in a normal traveling state.

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

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

FIG. 6 is a flowchart for explaining a sandwiching state determination operation and a method for determining a normal traveling state and a rough road traveling state in the power window switch device according to the embodiment of the present invention.

[Explanation of symbols]

1 power window switch device 2 vehicle window 3 power window switch (operation switch) 4 motor 8 CPU (controller; parameter change detecting means,
(Judging means, parameter changing means, judging means, control means)

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-9-328965 (JP, A) JP-A-6-33666 (JP, A) JP-A-6-66063 (JP, A) JP-A-8- 158741 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) E05F 15/00-15/20 B60J 1/00-1/17

Claims (3)

(57) [Claims] 1. An operation switch for instructing an up-and-down drive of a vehicle window, a motor for up-and-down driving a vehicle window, an operation command given to the motor based on instruction information from the operation switch, and a current of the motor and the like. In a power window switch device including a controller that takes in a parameter change value and controls a motor operation, the controller includes a parameter change value detection unit that detects the parameter change value within a fixed time, and the parameter change value and a normal value. Compared with a bad road determination threshold value for determining whether the running state is a bad road running state other than the normal running state, and when the parameter change value is smaller than the bad road determination threshold value, the normal running state And a determination means for determining that the vehicle is traveling on a rough road when the parameter change value is equal to or more than the threshold for rough road determination, When it is determined by the determination means that the vehicle is in the normal running state, the trapping detection threshold value for determining whether or not a finger or the like is trapped in the vehicle window is lowered, and when the determination means determines that the vehicle is traveling on a rough road. When it is determined, 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 changing means to change the parameter. When the value is smaller than the entrapment detection threshold value, it is determined that the entrapment state is not present, and when the parameter change value is equal to or greater than the entrapment detection threshold value,
A power window switch device comprising: a determination unit that determines that a pinch has occurred; and a control unit that stops or reverses driving of the motor when the determination unit determines that a pinch has occurred. 2. The power window switch device according to claim 1, wherein a rough road determination threshold value for determining whether the vehicle is in the normal running state or the rough road running state is variable. 3. The power window switch device according to claim 1, wherein a time for detecting the parameter change value by the parameter change value detecting means is variable.