JP2019210784A - Window open/close position detection device and window open/close position detection method - Google Patents

Abstract

To detect the open/close position of a window that is opened and closed by an electric motor with a simple structure and high accuracy.SOLUTION: The present invention includes calculating the open/close position of a window by assuming that the window is moving at a predetermined movement speed while an electric motor is driving the window; initializing the calculated open/close position of the window to change to the fully closed position when it is detected that the window is in fully closed state, or initializing the calculated open/close position of the window to change to the fully opened position when it is detected that the window is in fully opened state. This makes it possible to calculate the open/close position of the window with sufficient accuracy because errors do not accumulate if the open/close position is calculated by assuming the movement speed of the window.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a technique for detecting an opening / closing position of a window mounted on a vehicle and opened / closed by an electric motor.

  Vehicles that use an electric motor to open and close windows (so-called power window vehicles) are widely used today. In this power window car, since the load of the electric motor increases when the window is fully closed or fully opened, it is possible to detect that the window is fully closed or fully opened by monitoring the load. . Then, using this, if the ignition switch of the vehicle is turned off even though the window is not fully closed, it is determined that the window has been forgotten to be closed, and the vehicle occupant is notified accordingly. Can be notified.

  However, in the method of detecting that the window is fully closed based on the load of the electric motor, even if the vehicle occupant had opened the window for ventilation, the window was forgotten to be closed. Misdetected. Therefore, a technique has been proposed in which the opening / closing position of the window is detected by a sensor so that it is not determined that the window is forgotten to be closed when the gap is small (Patent Document 1).

JP 2009-086662 A

  However, the proposed conventional technique has a problem that the structure is complicated because a sensor for detecting the opening / closing position of the window is required.

  SUMMARY OF THE INVENTION The present invention has been made in view of the conventional technology having the above-mentioned problems, and aims to provide a technology capable of accurately detecting the opening / closing position of a window while having a simple structure. To do.

In order to solve the above-described problem, in the window opening / closing position detection device and the window opening / closing position detection method of the present invention, while the electric motor is driving the window, the window is moving at a predetermined moving speed. Calculate the opening and closing position of the window. When it is detected that the window is fully closed, the calculated opening / closing position of the window is initialized to the fully closed position. Alternatively, when it is detected that the window is fully opened, the calculated opening / closing position of the window is initialized to the fully opened position.
If it is assumed that the window is moving at a predetermined moving speed, there is a difference between the assumed moving speed and the actual moving speed, so that an error occurs in the calculated opening / closing position of the window. Since this error is accumulated as the window repeats movement, it is difficult to accurately calculate the opening / closing position of the window. On the other hand, in the window opening / closing position detection device and the window opening / closing position detection method of the present invention, every time it is detected that the window is fully closed, the calculated window opening / closing position is initialized to the fully closed position, Every time it is detected that the window is fully opened, the calculated opening / closing position of the window is initialized to the fully opened position. For this reason, no error is accumulated, so that the opening / closing position of the window can be calculated with sufficient accuracy.

It is explanatory drawing which showed the rough internal structure of the vehicle 1 carrying the window opening / closing position detection apparatus 100 of a present Example. It is explanatory drawing which showed the rough internal structure of the window opening / closing control apparatus 50 incorporating the window opening / closing position detection apparatus 100 of a present Example. It is a flowchart of the window opening / closing position detection process which the window opening / closing position detection apparatus 100 of a present Example performs. It is a flowchart of the process at the time of a fully closed and fully opened performed in a window opening / closing position detection process. In the window opening / closing position detection apparatus 100 of the present embodiment, it is an explanatory view showing the reason why the opening / closing position of the window can be detected with high accuracy while having a simple structure. It is explanatory drawing which showed the rough internal structure of the window opening / closing control apparatus 50 incorporating the window opening / closing position detection apparatus 150 of the modification. It is a flowchart of the first half part of the movement speed correction process which the window opening / closing position detection apparatus 150 of the modification implements. It is a flowchart of the latter half part of the movement speed correction process which the window opening / closing position detection apparatus 150 of the modification implements. It is explanatory drawing which illustrated a mode that the window opening-and-closing position detection apparatus 150 of a modification measures full open required time. It is explanatory drawing which illustrated a mode that the window opening-and-closing position detection apparatus 150 of a modification measures time required for full closure.

Hereinafter, examples will be described in order to clarify the contents of the present invention described above.
A. Device configuration :
FIG. 1A shows a rough internal structure of a vehicle 1 on which the window opening / closing position detection device 100 of this embodiment is mounted. The vehicle 1 is a so-called power window mounting vehicle that can move the window glass 10 up and down electrically. Inside the door 2 of the vehicle equipped with the power window, an electric motor 20 for moving the window glass 10 up and down, a holding part 21 holding the lower end portion of the window glass 10, and a movement of the holding part 21 moving up and down are guided. A guide rail 22 is built in. A pulley is attached to each of the upper end and the lower end of the guide rail 22, a pulley is also attached to the rotating shaft of the electric motor 20, and a drive belt 23 is stretched between these three pulleys. A holding portion 21 is attached to the drive belt 23. For this reason, when the electric motor 20 is rotated, the holding portion 21 attached to the drive belt 23 moves up and down along the guide rail 22, and the window glass 10 also moves up and down accordingly.
Further, the vehicle 1 is equipped with a window opening / closing control device 50 for controlling the operation of the electric motor 20, and the window opening / closing position detecting device 100 of this embodiment is incorporated in the window opening / closing control device 50. It is.

FIG. 1B shows a case where the window glass 10 is fully closed. When the window glass 10 is fully closed, the upper end of the window glass 10 comes into contact with a seal member (not shown) on the vehicle 1 side and does not rise any further. For this reason, when the window glass 10 is fully closed, the load of the electric motor 20 increases. Therefore, it can be detected that the window glass 10 has been fully closed by detecting that the load of the electric motor 20 has exceeded a predetermined value.
FIG. 1C shows a case where the window glass 10 is fully opened. When the window glass 10 is fully opened, the holding portion 21 attached to the lower end of the window glass 10 comes into contact with a stopper (not shown) of the guide rail 22 and does not descend any further. For this reason, the load of the electric motor 20 also increases when the window glass 10 is fully opened. Therefore, it can be detected that the window glass 10 is fully opened by detecting that the load of the electric motor 20 has exceeded a predetermined value.

FIG. 2 shows the internal structure of the window opening / closing control device 50 that controls the operation of the electric motor 20. As indicated by a broken line in the drawing, the window opening / closing position detecting device 100 of this embodiment is incorporated as a part of the window opening / closing control device 50.
As shown in the figure, the window opening / closing control device 50 incorporates an electric motor drive unit 51, a motor current detection unit 52, and the window opening / closing position detection device 100 of this embodiment. Further, the window opening / closing position detecting device 100 of the present embodiment includes a driving load detecting unit 101, a driving direction detecting unit 102, a fully closed position detecting unit 103, a fully opened position detecting unit 104, an opening / closing position calculating unit 105, The moving speed correction unit 106, the off state detection unit 107, the notification unit 108, and the like are incorporated.
Note that these “units” focus on the functions of the window opening / closing control device 50 for controlling the electric motor 20 and detecting the opening / closing position of the window glass 10. For the sake of convenience, and does not indicate that the inside of the window opening / closing control device 50 is physically divided into these “parts”. Therefore, these “units” can be realized in software by a program that runs on a computer, or can be realized in hardware by an electronic circuit including IC, LSI, etc. It can also be realized by combining them.

The electric motor drive unit 51 is connected to the operation switch 25 of the power window. When an occupant of the vehicle 1 operates the operation switch 25, the operation content is input to the electric motor drive unit 51. And when operation content is the content to raise the window glass 10, the window glass 10 is raised by sending the electric current of a positive direction to the electric motor 20, and rotating the electric motor 20 to a normal direction.
On the other hand, when the content of operation is the content of lowering the window glass 10, the window glass 10 is moved by rotating the electric motor 20 in the reverse direction by passing a negative current through the electric motor 20. Lower.

The motor current detection unit 52 detects the current value of the motor current flowing through the electric motor 20 (hereinafter, the current value of the motor current is referred to as a motor current value) and outputs the detected current value to the electric motor drive unit 51. The electric motor drive unit 51 detects the load of the electric motor 20 based on the motor current value received from the motor current detection unit 52, and stops driving the electric motor 20 when the load becomes higher than a predetermined value. To do.
The motor current detector 52 also outputs the detected motor current value to the drive load detector 101 and the drive direction detector 102.

The drive load detection unit 101 detects the drive load of the electric motor 20 by acquiring the absolute value of the motor current received from the motor current detection unit 52, and sends it to the fully closed position detection unit 103 and the fully open position detection unit 104. Output.
The drive direction detection unit 102 detects the drive direction of the electric motor 20 by acquiring the sign of the motor current value received from the motor current detection unit 52. That is, when the motor current value is a positive value, it is determined that the driving direction of the electric motor 20 is the positive direction and the moving direction of the window glass 10 is the upward direction. When the motor current value is a negative value, it is determined that the driving direction of the electric motor 20 is a negative direction and the moving direction of the window glass 10 is a descending direction. Then, the drive direction detection unit 102 outputs the detected drive direction to the fully closed position detection unit 103 and the fully open position detection unit 104.

When the driving direction received from the driving direction detection unit 102 is a positive direction and the driving load received from the driving load detection unit 101 exceeds a predetermined full closing threshold, It is detected that the window glass 10 is in the fully closed position.
Further, the fully open position detection unit 104, when the drive direction received from the drive direction detection unit 102 is a negative direction, and the drive load received from the drive load detection unit 101 exceeds a predetermined full open threshold, It is detected that the window glass 10 is in the fully open position. Note that the fully closed threshold and the fully opened threshold may be the same value.

The open / close position calculation unit 105 receives the driving load of the electric motor 20 and determines whether or not the window glass 10 is moving. The opening / closing position calculation unit 105 recognizes the moving direction of the window glass 10 by receiving the driving direction of the electric motor 20.
Here, if it is assumed that the window glass 10 moves at a predetermined movement speed, the movement amount of the window glass 10 can be calculated from the movement time and movement direction of the window glass 10. Therefore, the opening / closing position calculation unit 105 calculates the opening / closing position of the window glass 10 by acquiring the movement amount of the window glass 10 from the fully closed position or the fully opened position.
In addition, the opening / closing position calculation unit 105 of the present embodiment initializes the calculated opening / closing position to the fully closed position every time the window glass 10 reaches the fully closed position from the fully closed position detection unit 103. To do. Similarly, every time the window glass 10 reaches the fully opened position from the fully opened position detection unit 104, the calculated opening / closing position is initialized to the fully opened position.

The movement speed correcting unit 106 is connected to the fully closed position detecting unit 103, the fully opened position detecting unit 104, and the opening / closing position calculating unit 105, and when it is detected that the window glass 10 has reached the fully closed position. The opening / closing position of the window glass 10 calculated at that time is acquired. When it is detected that the window glass 10 has reached the fully opened position, the opening / closing position of the window glass 10 calculated at that time is acquired.
Then, the moving speed of the window glass 10 in the closing direction is corrected based on the opening / closing position calculated when the window glass 10 reaches the fully closed position. Further, the moving speed of the window glass 10 in the opening direction is corrected based on the opening / closing position calculated when the window glass 10 reaches the fully opened position. A method of correcting the moving speed of the window glass 10 in the closing direction or the opening direction will be described later.

The off-state detection unit 107 is connected to an engine start switch (not shown), detects that the engine start switch is turned off, and outputs the detection unit 108 to the notification unit 108.
When the engine start switch is turned off, the notification unit 108 acquires the opening / closing position of the window glass 10 calculated by the opening / closing position calculation unit 105 at that time. When the window glass 10 is in an open state and the opening / closing position with respect to the fully closed position is a predetermined value or more, the fact that the window glass 10 is in an open state is indicated by the speaker 5 or the like. To the passenger of the vehicle 1.

As described above, since the opening / closing position of the window glass 10 is calculated on the assumption that the window glass 10 moves at a predetermined moving speed, an error is included with respect to the actual opening / closing position. Therefore, if the condition for warning the occupant is not whether or not the window glass 10 is in the fully closed position, but whether or not the window glass 10 is opened more than a predetermined value with respect to the fully closed position, the influence of the error. Therefore, there is a possibility that the warning cannot be performed when the warning should be given. In order to avoid this, it is determined whether or not to warn based on whether or not the window glass 10 is in the fully closed position, otherwise the open / close position of the window glass 10 is detected using a dedicated sensor. Need to be done.
However, in the window opening / closing position detection apparatus 100 of the present embodiment described above, the error can be suppressed to the extent that does not cause a practical problem. For this reason, even if no special sensor is installed, it is possible to reliably warn the occupant of the vehicle 1 when the window glass 10 is opened by a predetermined value or more with respect to the fully closed position. Become. This is possible because the window opening / closing position detection device 100 of the present embodiment detects the opening / closing position of the window glass 10 using the following method.

B. Window open / close position detection processing:
FIG. 3 shows a flowchart of a window opening / closing position detection process executed by the window opening / closing position detection apparatus 100 according to the present embodiment to detect the opening / closing position of the window glass 10.
As shown in the figure, in the window opening / closing position detection process, first, it is determined whether or not the driving load of the electric motor 20 (that is, the absolute value of the motor current value) is greater than or equal to a predetermined value (S100). As a result, when the drive load is less than the predetermined value (S100: no), it is considered that the electric motor 20 is not driven, and the standby state is established by repeating the same determination (S100).
On the other hand, when the drive load of the electric motor 20 is equal to or greater than a predetermined value (S100: yes), it is considered that the electric motor 20 is being driven.

Therefore, this time, it is determined whether or not the driving load of the electric motor 20 is larger than either the predetermined full-close threshold or the predetermined full-open threshold (S101). Here, the fully closed threshold is a threshold used to determine whether or not the window glass 10 has been fully closed, and the fully open threshold is to determine whether or not the window glass 10 has been fully opened. This is a threshold value used for this purpose. As described above with reference to FIG. 1 (b) or FIG. 1 (c), when the window glass 10 is in a fully closed state or a fully open state, it will not rise or fall any further, so the driving load of the electric motor 20 increases. To do. For this reason, by setting an appropriate fully closed threshold value or fully opened threshold value in advance, when the driving load of the electric motor 20 exceeds either the fully closed threshold value or the fully opened threshold value, the window glass 10 is fully closed or fully opened. It can be determined that
If the electric motor 20 is being driven (S100: yes), whether the electric motor 20 is in the fully closed state or the fully open state by comparing the driving load of the electric motor 20 with the fully closed threshold value and the fully opened threshold value (S101). Judge whether or not. It should be noted that the full-close threshold and the full-open threshold can be shared by either larger threshold.

As a result, if the drive load of the electric motor 20 exceeds either the full-close threshold or the full-open threshold (S101: yes), after performing the fully-closed full-open process (S200) described later, the head of the process Returning to step S100, it is determined again whether the driving load of the electric motor 20 is equal to or greater than a predetermined value (S100). As will be described in detail later, in the fully closed fully opened process (S200), the following process is roughly performed. First, it is determined whether the window glass 10 is in a fully closed state or a fully open state. And according to the result, the opening / closing position of the window glass 10 is set as a fully closed position or a fully open position.
As will be described later, in the window opening / closing position detection process, the opening / closing position of the window glass 10 is calculated on the assumption that the window glass 10 moves at a predetermined speed. In any state, the opening / closing position of the window glass 10 calculated at that time is set as a fully closed position or a fully opened position.
Furthermore, the moving speed of the window glass 10 is corrected based on the opening / closing position of the window glass 10 calculated at the time of the fully closed state or the fully opened state. These points will be described in detail later.

  On the other hand, when the drive load of the electric motor 20 does not exceed both the full-close threshold and the full-open threshold (S101: no), it is determined whether or not the drive direction of the electric motor 20 is the positive direction (S102). The driving direction of the electric motor 20 can be determined based on the positive or negative of the motor current flowing through the electric motor 20. That is, when the motor current value flowing through the electric motor 20 is a positive value, it can be determined that the driving direction is a positive direction. When the motor current value is a negative value, the driving direction is a negative direction. Can be determined.

When the driving direction of the electric motor 20 is the positive direction (S102: yes), it is determined whether or not a predetermined minute time (for example, 50 μsec) has passed (S103). As a result, if the time has not elapsed (S103: no), the same determination in S103 is repeated to enter a standby state until the minute time has elapsed, but when the minute time has elapsed (S103: yes), the window glass 10 Assuming that increases at the moving speed in the closing direction, the opening / closing position of the window glass 10 is updated (S104). That is, when the driving direction of the electric motor 20 is the positive direction (S102: yes), the window glass 10 is raised at a predetermined constant speed (that is, moving speed in the closing direction) for a predetermined minute time. Assuming that, the opening / closing position of the window glass 10 is moved in the closing direction by a distance corresponding to “moving speed in the closing direction” × “minute time”.
Thus, when the opening / closing position of the window glass 10 is updated (S104), the process returns to the top of the process, and it is determined again whether the driving load of the electric motor 20 is equal to or greater than a predetermined value (S100).

On the other hand, even when it is determined that the driving direction of the electric motor 20 is not the positive direction (that is, the negative direction) (S102: no), a predetermined minute time (for example, 50 μsec) has elapsed. It is determined whether or not (S105). As a result, if it has not elapsed (S105: no), the same determination is repeated to enter a standby state. And if minute time passes (S105: yes), it will assume that the window glass 10 descend | falls with the moving speed of an opening direction, and the opening / closing position of the window glass 10 is updated (S106). That is, when the driving direction of the electric motor 20 is negative (S102: no), it is assumed that the window glass 10 rises at a moving speed in a predetermined opening direction for a predetermined minute time. The opening / closing position of the glass 10 is moved in the opening direction by a distance corresponding to “movement speed in the opening direction” × “minute time”.
Thus, when the opening / closing position of the window glass 10 is updated (S106), the process returns to the top of the process, and it is determined again whether the driving load of the electric motor 20 is equal to or greater than a predetermined value (S100).

Thus, in the window opening / closing position detection process, the opening / closing position of the window glass 10 is calculated on the assumption that the window glass 10 is raised or lowered at a predetermined moving speed. However, the window glass 10 does not necessarily rise or fall at a constant moving speed, and the moving speed changes with the passage of time due to the influence of deterioration over time. For this reason, it has been considered difficult to ensure a practical calculation accuracy even if the opening / closing position of the window glass 10 is calculated on the assumption that the window glass 10 is raised or lowered at a predetermined moving speed. .
However, in the window opening / closing position detecting device 100 of the present embodiment, every time the window glass 10 is in the fully closed state or the fully open state, the following fully closed and fully open process is executed, which is sufficiently practical. The opening / closing position of the window glass 10 can be calculated with accuracy.

C. Processing when fully closed and fully open:
FIG. 4 shows a flowchart of the fully-closed and fully-open process executed by the window opening / closing position detection apparatus 100 of the present embodiment. As described above with reference to FIG. 3, this process is a process executed by the window opening / closing position detection device 100 every time it is determined that the window glass 10 is fully closed or fully opened (S101: yes). is there.

  As shown in FIG. 4, in the fully closed full open process (S200), first, it is determined whether or not the drive direction of the electric motor 20 is the positive direction (S201). As described above, when the motor current value of the electric motor 20 is a positive value, the driving direction can be determined as a positive direction. Conversely, when the motor current value is a negative value, the driving direction is determined. Can be determined to be negative.

As a result, when the drive direction is the positive direction (S201: yes), the opening / closing position of the window glass 10 calculated in the window opening / closing position detection process described above is acquired (S202). Then, the moving speed in the closing direction of the window glass 10 is corrected based on the acquired calculated opening / closing position (S203). This is the following process.
First, in the fully closed fully opened process of FIG. 4, when the window glass 10 is determined to be in the fully closed state or the fully opened state in the window opening / closing position detection process described above with reference to FIG. 3 (that is, FIG. 3). S101: yes). As a result, when the driving direction of the electric motor 20 is positive (S201: yes) in S201 of the fully closed full opening process of FIG. 4 started as a result, it may be considered that the window glass 10 was rising. Therefore, the window glass 10 should be fully closed.

Then, when the calculated opening / closing position is acquired when the window glass 10 reaches the fully closed position, for example, when the calculated opening / closing position has not yet reached the fully closed position, the window glass 10 is closed. It is considered that the moving speed in the direction is smaller than the actual moving speed.
Therefore, in such a case, correction is made so that the moving speed in the closing direction increases. In the correction, a small unit correction amount is determined in advance, and the moving speed in the closing direction is corrected by adding the unit correction amount to the moving speed in the closing direction. Of course, according to the deviation between the calculated opening / closing position and the fully closed position, the correction amount may be increased as the deviation increases.

Or conversely, when the calculated opening / closing position has already passed the fully closed position when the window glass 10 is in the fully closed state, the moving speed in the closing direction of the window glass 10 is actually It is considered to be larger than the moving speed.
Therefore, in such a case, the moving speed in the closing direction is corrected by subtracting the unit correction amount from the moving speed in the closing direction so that the moving speed in the closing direction becomes small. Of course, according to the deviation between the calculated opening / closing position and the fully closed position, the correction amount may be increased as the deviation increases.

Thus, if the moving speed of the window glass 10 in the closing direction is corrected (S203), the calculated value of the opening / closing position of the window glass 10 is set to the fully closed position (S204). By doing so, the error caused by assuming the moving speed of the window glass 10 is eliminated.
Then, after the fully closed full open process of FIG. 4 is terminated and the process returns to the window opening / closing position detection process of FIG. 3, it is determined whether or not the driving load of the electric motor 20 is equal to or greater than a predetermined value (S100).

The case where it is determined that the drive direction of the electric motor 20 is the positive direction at the time when the fully closed fully opened process is started (S201: yes) has been described.
On the other hand, when it is determined that the driving direction of the electric motor 20 is not the positive direction (that is, the negative direction) (S201: no), it may be considered that the window glass 10 is fully opened.
Therefore, the opening / closing position of the window glass 10 calculated in the window opening / closing position detection process described above is acquired (S205), and the moving speed in the opening direction of the window glass 10 is corrected based on the opening / closing position (S206). . That is, when the window glass 10 reaches the fully open position, if the calculated opening / closing position has not yet reached the fully open position, the moving speed of the window glass 10 in the opening direction is higher than the actual moving speed. It is considered small.
Therefore, in such a case, the moving speed in the opening direction is corrected by adding a unit correction amount to the moving speed in the opening direction so that the moving speed in the opening direction is increased. Of course, according to the deviation between the calculated opening / closing position and the fully closed position, the correction amount may be increased as the deviation increases.

Or conversely, when the calculated opening / closing position has already passed the fully opened position when the window glass 10 is fully opened, the movement speed in the opening direction of the window glass 10 is the actual movement speed. It is thought that it is bigger.
Therefore, in such a case, the moving speed in the opening direction is corrected by subtracting the unit correction amount from the moving speed in the opening direction so that the moving speed in the opening direction becomes small. Of course, according to the deviation between the calculated opening / closing position and the fully opened position, the correction amount may be increased as the deviation increases.

  When the movement speed in the opening direction of the window glass 10 is corrected in this way (S206), the calculated value of the opening / closing position of the window glass 10 is set to the fully opened position (S207), and then the fully closed fully opened process in FIG. . Then, after returning to the window opening / closing position detection processing of FIG. 3, it is determined whether or not the driving load of the electric motor 20 is equal to or greater than a predetermined value (S100), and the above-described series of processing is started.

  As described above, the window opening / closing position detecting device 100 according to the present embodiment calculates the opening / closing position of the window glass 10 on the assumption that the window glass 10 moves at a constant moving speed. In such a method, errors accumulate in the calculation result of the open / close position, so it is difficult to ensure position accuracy that can withstand practical use. However, in the window opening / closing position detection apparatus 100 of the present embodiment, an error can be eliminated every time the window glass 10 is in a fully closed state or a fully open state.

In FIG. 5, assuming that the moving speed in the closing direction of the window glass 10 is lowered due to the influence of deterioration over time, in the window opening / closing position detecting device 100 of the present embodiment, the window glass 10 is in a fully closed state or The manner in which the error is eliminated each time the fully opened state is illustrated. First, the case where the error is not eliminated even when the window glass 10 is in the fully closed state or the fully open state will be described with reference to FIG. The solid line shown in the figure represents the actual opening / closing position of the window glass 10, and the broken line in the figure represents the calculated opening / closing position.
Here, since the case where the moving speed of the window glass 10 in the closing direction is assumed to be reduced, the time required for the window glass 10 to be changed from the fully open state to the fully closed state is longer than that when the window glass 10 is moved at the original speed. become longer. For this reason, when the opening / closing position is calculated on the assumption that the window glass 10 moves at the original speed, the opening / closing position of the window glass 10 exceeds the fully closed position, as indicated by a broken line in the drawing. Then, the magnitude of the calculated opening / closing position error dp with respect to the actual opening / closing position gradually increases as the window glass 10 reciprocates between the fully opened position and the fully closed position.

On the other hand, even in the case shown in FIG. 5 (b), since the window glass 10 calculates the opening / closing position of the window glass 10 assuming that the window glass 10 moves at its original speed, the window glass 10 actually reaches the fully closed position. At the time, the calculated opening / closing position exceeds the fully closed position. Accordingly, an error occurs between the calculated opening / closing position and the actual opening / closing position. However, in the window opening / closing position detecting device 100 of the present embodiment, the calculation is performed every time the window glass 10 actually reaches the fully closed position. Correct the open / close position to the fully closed position.
Here, since it is assumed that the window glass 10 moves at the original speed in the opening direction, even if the window glass 10 moves from the fully closed position to the fully opened position, the actual opening / closing position is calculated. There is no error between In FIG. 5 (b), the calculated opening / closing position is not corrected in the fully opened position, because the result does not change regardless of whether or not the correction is made. Every time 10 reaches the fully open position, the calculated opening / closing position is corrected.

  As shown in FIG. 5 (b), in the window opening / closing position detecting device 100 of the present embodiment, every time the window glass 10 actually reaches the fully closed position or the fully opened position, the calculated opening / closing position is set to the fully closed position or the fully opened position. Correct to position. For this reason, even if the window glass 10 reciprocates between the fully opened position and the fully closed position, the magnitude of the error between the calculated opening / closing position and the actual opening / closing position can be kept within a certain range. As a result, the opening / closing position of the window glass 10 can be calculated with sufficiently practical accuracy without detecting the opening / closing position of the window glass 10 using a sensor. If the opening / closing position of the window glass 10 can be calculated with sufficient accuracy, an appropriate warning is given to the passenger of the vehicle 1 based on the opening / closing position of the window glass 10 when the engine start switch is turned off. be able to. For example, even if the window glass 10 is not in a fully closed state, no warning is given if the opening / closing position of the window glass 10 is within a predetermined allowable range, but a warning can be reliably issued when the window glass 10 is outside the allowable range. .

In addition, in the window opening / closing position detection device 100 of the present embodiment, the moving speed in the closing direction used for calculating the opening / closing position based on the opening / closing position calculated when the window glass 10 actually reaches the fully closed state. Can be corrected. Similarly, the moving speed in the opening direction can be corrected based on the opening / closing position calculated when the window glass 10 actually reaches the fully opened state.
For this reason, even when the moving speed of the window glass 10 changes from the original speed due to the influence of deterioration over time, the moving speed used for calculating the opening / closing position can be brought close to the actual moving speed.

In addition, when it is detected that the window glass 10 has actually reached the fully closed state or the fully opened state, the moving speed of the window glass 10 is corrected by a predetermined unit correction amount according to the opening / closing position calculated at that time. I will do it. For this reason, at least in the vicinity of the fully closed position and the fully open position, the deviation between the actual opening / closing position of the window glass 10 and the calculated opening / closing position is within a certain range corresponding to the unit correction amount of the moving speed. .
Therefore, if the unit correction amount of the moving speed is set to an appropriate value in advance, even if the vehicle 1 is used for a long period of time, the calculation accuracy of the opening / closing position of the window glass 10 is made sufficiently accurate. Can be maintained.

D. Modified example:
In the present embodiment described above, when the window glass 10 is actually fully closed or fully opened, the moving speed of the window glass 10 is set by a predetermined unit correction amount according to the opening / closing position calculated at that time. It was explained as a modification.
However, the time until the window glass 10 changes from the fully closed state to the fully open state is measured, or conversely, the time until the window glass 10 changes from the fully open state to the fully closed state is measured. The travel time may be corrected.

  FIG. 6 is an explanatory diagram showing a rough internal structure of the window opening / closing control device 50 incorporating the window opening / closing position detection device 150 of the above-described modification. The window opening / closing position detection device 150 of the modification is different from the window opening / closing position detection device 100 of the present embodiment described above with reference to FIG. 2 in that a timer 159 is added and the movement speed correction unit 106 moves. This is greatly different from the point that the speed correction unit 156 is changed. On the other hand, the other points are the same as those of the window opening / closing position detection apparatus 100 of the present embodiment shown in FIG. In FIG. 6, portions related to the difference from the window opening / closing position detection device 100 of the present embodiment shown in FIG. 2 are displayed, and unrelated portions (for example, the opening / closing position calculation unit 105, the off state detection unit 107, The notification unit 108) is not shown.

As shown in FIG. 6, the window opening / closing position detection device 150 of the modified example includes a drive load detection unit 101, a drive direction detection unit 102, a fully closed position detection unit 103, a fully open position detection unit 104, A unit 159, a movement speed correction unit 156, and the like are incorporated. Although not shown in FIG. 6, the window opening / closing position detection device 150 according to the modified example includes an opening / closing position calculation unit 105, a moving speed, and the like, similar to the window opening / closing position detection device 100 according to the present embodiment described above. A correction unit 106, an off state detection unit 107, a notification unit 108, and the like are also incorporated.
It should be noted that the timing unit 159 and the movement speed correction unit 156 provided in the window opening / closing position detection device 150 of the modified example also indicate that these “parts” are physically divided inside the window opening / closing position detection device 150. It does not show. Therefore, these “units” can be realized in software by a program that runs on a computer, or can be realized in hardware by an electronic circuit including IC, LSI, etc. It can also be realized by combining them.

The electric motor drive unit 51 drives the electric motor 20 according to the operation content of the operation switch 25 of the power window.
The motor current detection unit 52 detects the motor current value of the electric motor 20 and outputs it to the electric motor drive unit 51 and also outputs it to the drive load detection unit 101 and the drive direction detection unit 102.

The drive load detection unit 101 detects the drive load of the electric motor 20 based on the motor current value received from the motor current detection unit 52 and outputs it to the fully closed position detection unit 103 and the fully open position detection unit 104.
The drive direction detection unit 102 detects the drive direction of the electric motor 20 based on the motor current value received from the motor current detection unit 52 and outputs it to the fully closed position detection unit 103 and the fully open position detection unit 104.
The fully closed position detection unit 103 detects that the window glass 10 is at the fully closed position based on the drive load received from the drive load detection unit 101 and the drive direction received from the drive direction detection unit 102.
Further, the fully open position detection unit 104 detects that the window glass 10 is in the fully open position based on the drive load received from the drive load detection unit 101 and the drive direction received from the drive direction detection unit 102.

  In addition, the window opening / closing position detection device 150 of the modified example is provided with a timer 159, which is connected to the fully closed position detector 103 and the fully opened position detector 104, and the window glass 10. Can be recognized as being fully closed or fully open. In addition, the timing unit 159 is also connected to the driving load detection unit 101 and the driving direction detection unit 102, and can recognize whether or not the window glass 10 is moving and the moving direction. Therefore, the timer 159 measures the time required for the window glass 10 to change from the fully closed state to the fully open state, and the time required for the window glass 10 to change from the fully open state to the fully closed state, and determines the result as a moving speed. The data is output to the correction unit 156.

The movement speed correction unit 156 corrects the movement time in the opening direction based on the time required from the fully closed state to the fully open state, and closes based on the time required to change from the fully open state to the fully closed state. Correct the direction travel time.
In this way, even if the moving speed of the window glass 10 changes due to the influence of deterioration over time, the moving speed used to calculate the opening / closing position of the window glass 10 can be corrected to the actual moving speed. In addition, the opening / closing position of the window glass 10 can be calculated with high accuracy.

FIG. 7 and FIG. 8 show a flowchart of the movement speed correction process executed by the window opening / closing position detection device 150 of the above-described modification to correct the movement speed of the window glass 10.
As shown in FIG. 7, in the moving speed correction process, first, it is determined whether or not the window glass 10 is fully closed (S300). When the driving direction of the window glass 10 is a positive direction and the driving load of the window glass 10 is larger than a predetermined fully closed threshold, it can be determined that the window glass 10 has been fully closed.

When the window glass 10 is not in a fully closed state (S300: no), it is determined whether or not the window glass 10 is in a fully open state (S313 in FIG. 8). When the driving direction of the window glass 10 is a negative direction and the driving load of the window glass 10 becomes larger than a predetermined full open threshold, it can be determined that the window glass 10 has been fully opened.
As a result, when it is not in the fully open state (S313: no), it is determined again whether or not the window glass 10 is in the fully closed state (S300 in FIG. 7).

  While repeating such a determination, the window glass 10 will eventually be either fully closed or fully open. Here, if it is in the fully closed state, it is determined as “yes” in S300, and it is determined whether or not the window glass 10 has started moving (S301). Since the window glass 10 is in a fully closed state, the electric motor 20 that drives the window glass 10 is driven in the negative direction, and the driving load of the electric motor 20 is greater than or equal to the predetermined value used in the determination of S100 in FIG. If it is, it can be determined that the window glass 10 has started moving. On the other hand, when the electric motor 20 is driven in the positive direction, or when the driving load is less than the predetermined value even when the electric motor 20 is driven in the negative direction, the window glass 10 starts to move. It can be judged that it is not.

As a result, when it is determined that the window glass 10 has not started moving (S301: no), the same determination of S301 is repeated until the window glass 10 starts moving.
On the other hand, when it is determined that the window glass 10 has started moving (S301: yes), measurement of the time required for full opening is started (S302). Here, the fully open time is the time required for the window glass 10 to change from the fully closed state to the fully open state.

Subsequently, it is determined whether or not the window glass 10 is moving (S303). When the driving load of the electric motor 20 that drives the window glass 10 is equal to or greater than the predetermined value used in the determination in S100 of FIG. 3 (however, when the full opening threshold is not reached), it is determined that the window glass 10 is moving. Can do. On the other hand, when the driving load of the electric motor 20 is less than the predetermined value, it can be determined that the window glass 10 has stopped.
As a result, if the window glass 10 is moving (S303: yes), it is determined whether or not the window glass 10 is fully opened (S304). If the window glass 10 is not fully opened (S304: no), the window is again opened. It is determined whether or not the glass 10 is moving (S303). By repeating such an operation, the time required for full opening is counted. If it is determined that the window glass 10 has been fully opened (S304: yes), the time measurement is terminated, and the value measured at that time is acquired as the required time for full opening (S305).

Of course, the window glass 10 may be stopped halfway before the window glass 10 reaches the fully open state from the fully closed state. In such a case, it is determined as “no” in S303, and the counting of the time required for full opening is interrupted (S308). Then, it is determined whether or not the movement of the window glass 10 has been resumed (S309). If the movement has not been resumed (S309: no), the same determination in S309 is repeated until the movement is resumed. It becomes a state.
And if a movement is restarted (S309: yes), it will be judged whether the moving direction of the window glass 10 is an open direction this time (S310). If the driving direction of the electric motor 20 that drives the window glass 10 is negative, it can be determined that the window glass 10 is moving in the opening direction, and if the driving direction of the electric motor 20 is positive, It can be determined that the window glass 10 is moving in the closing direction.

  As a result, when the window glass 10 is moving in the opening direction (S310: yes), the counting of the required time for full opening that has been interrupted is resumed (S311). Then, it is determined whether or not the window glass 10 is fully opened (S304). If it is not fully opened (S304: no), it is determined whether or not the window glass 10 is moving (S303) and moved. If it is in the middle (S303: yes), it is determined again whether or not it has been fully opened (S304). While the operation is repeated, if the fully opened state is reached (S304: yes), the time measurement is finished and the required time for full opening is acquired (S305).

The case has been described above where the window glass 10 that has started moving in the opening direction from the fully closed state temporarily stops in the middle (S303: no) and then starts moving again in the opening direction (S310: yes).
On the other hand, when the window glass 10 that has been temporarily stopped in the middle starts to move in the opposite direction (that is, the closing direction) (S310: no), the value of the time required for full opening that has been measured so far. Is discarded (S312). Therefore, the time required for full opening can be obtained when moving from the fully closed state to the fully opened state without stopping in the middle, or even when stopping in the middle, it becomes the fully opened state without moving in the reverse direction. . Moreover, when it stops on the way, the time stopped is not included in the time required for full opening. In S305, such a time required for full opening is acquired.
FIG. 9 illustrates a state where the time required for full opening is measured. In the illustrated example, the window glass 10 is moved in the portion indicated by the thick line, but the window glass 10 is stopped in the portion indicated by the broken line. However, even in such a case, it is possible to measure the time required for full opening by measuring the time of the portion indicated by the thick line in which the window glass 10 is moving.

The moving speed in the opening direction of the window glass 10 is calculated from the time required for full opening (S306). That is, since the distance that the window glass 10 moves from the fully closed state to the fully opened state is determined by design, the time required to move the distance (that is, the time required for full opening) is divided. Thus, the moving speed in the opening direction can be calculated.
Then, the moving speed in the opening direction used for calculating the opening / closing position of the window glass 10 is changed to the calculated moving speed (S307).
When the moving speed in the opening direction is changed as described above (S307), the process returns to the top of the process to determine whether or not the fully closed state is reached (S300), or whether or not the fully opened state is reached (S300). Step S313 in FIG. 8 is repeated. Also, when the time required for full opening during the counting is discarded (S312), the process returns to the top of the process to determine whether or not the fully closed state is reached (S300), or whether or not the fully opened state is reached (FIG. 3). Repeat step S313).

In the above, at the beginning of the process, when it was repeatedly determined whether the window glass 10 was fully closed or fully opened (S300 and S313 in FIG. 8), the window glass 10 was fully closed. The case of determination (S300: yes) has been described.
On the other hand, when it is determined that the window glass 10 has been fully opened (S313: yes), the moving speed in the closing direction is changed as follows.

  First, it is determined whether or not the window glass 10 has started moving (S314). Here, since the window glass 10 is fully opened, the electric motor 20 that drives the window glass 10 is driven in the forward direction, and the driving load of the electric motor 20 is a predetermined value used in the determination of S100 in FIG. When it is more than the value, it can be determined that the window glass 10 has started moving.

As a result, when it is determined that the window glass 10 has started moving (S314: yes), measurement of the time required for full closure is started (S315). The fully closed time is the time required for the window glass 10 to change from the fully open state to the fully closed state.
Then, it is determined whether or not the window glass 10 is moving (S316). If the window glass 10 is moving (S316: yes), it is determined whether or not the window glass 10 is fully closed (S317). As a result, if it is not in the fully closed state (S317: no), it is determined again whether or not the window glass 10 is moving (S316). If it is determined that the window glass 10 is in a fully closed state while repeating such an operation (S317: yes), the time measurement is terminated, and the value measured at that time is acquired as the time required for full closure. (S318).

Moreover, when the window glass 10 stops on the way until it reaches a fully closed state from a fully open state (S316: no), time-measurement of a fully closed required time is interrupted (S321). Then, it is determined whether or not the movement of the window glass 10 has been resumed (S322). If the movement has not been resumed (S322: no), the window glass 10 is on standby until the movement is resumed.
When the movement is resumed (S322: yes), it is determined whether or not the moving direction of the window glass 10 is the closing direction (S323). As a result, when the window glass 10 is moving in the closing direction (S323: yes), the counting of the interrupted time required for full closing is resumed (S324), and the window glass 10 is fully closed. Whether or not the window glass 10 is moving is determined (S316) if it is not fully closed (S317: no). In this way, the time for the restarted time required for full closure is continued.

In addition, when the window glass 10 that has been stopped has started to move again (S322: yes), if the moving direction is the reverse direction (that is, the opening direction) (S323: no), the measurement has been performed so far. The value of the required time for full closing is discarded (S325). Therefore, the time required for full closure can be obtained when moving from the fully open state to the fully closed state without stopping in the middle, or even when stopping in the middle, it becomes fully closed without moving in the reverse direction. It becomes.
FIG. 10 illustrates the state of measuring the time required for full closure. As in the case of FIG. 9, the thick line in the figure indicates that the window glass 10 is moving, and the broken line in the figure indicates that the window glass 10 is stopped. Even in such a case, the time required for full closure can be measured by measuring the time of the portion indicated by the thick line in which the window glass 10 is moving.
Since the time required for full opening and the time required for full closing often have the same value, these may be combined to be the time required for full opening and closing.

When the time required for full closure is thus obtained (S318), the moving speed in the closing direction of the window glass 10 is calculated (S319). That is, since the distance that the window glass 10 moves from the fully opened state to the fully closed state is determined by design, the time required to move the distance (that is, the time required to fully close) is determined. If it is known, the moving speed in the closing direction can be calculated. Then, the moving speed in the closing direction used for calculating the opening / closing position of the window glass 10 is changed to the calculated moving speed (S320).
As described above, when the moving speed in the closing direction is changed (S320), or when the time required for full opening during counting is discarded (S324), the process returns to the top of the process to determine whether or not the fully closed state is reached. (S300 in FIG. 7) and the determination of whether or not the fully opened state (S313 in FIG. 8) is repeated.

  In the window opening / closing position detection device 150 of the modified example, as described above, the time required for the window glass 10 to be fully opened to move from the fully closed state to the fully open state, or to move from the fully open state to the fully closed state is required. Measure the time required for full closure. Then, based on the time required for full opening and the time required for full closing, the moving speed in the opening direction and the moving speed in the closing direction of the window glass 10 are calculated. For this reason, even when the moving speed of the window glass 10 changes due to the influence of deterioration over time of the vehicle 1, the opening / closing position of the window glass 10 can be accurately calculated by reflecting the change of the moving speed. .

  As mentioned above, although the present Example and the modification were demonstrated, this invention is not limited to the above-mentioned Example and modification, It can implement in a various aspect in the range which does not deviate from the summary.

DESCRIPTION OF SYMBOLS 1 ... Vehicle, 5 ... Speaker, 10 ... Window glass, 20 ... Electric motor,
21 ... Holding part, 22 ... Guide rail, 23 ... Drive belt,
25 ... Operation switch, 50 ... Window opening / closing control device, 51 ... Electric motor drive unit,
52 ... Motor current detector, 100 ... Window open / close position detector,
101 ... Driving load detection unit, 102 ... Driving direction detection unit,
103: a fully closed position detector, 104 ... a fully opened position detector,
105: Opening / closing position calculation unit, 106: Movement speed correction unit,
107: OFF state detection unit, 108: notification unit, 150: window opening / closing position detection device,
156 ... Movement speed correction part, 159 ... Timekeeping part.

Claims (7)

A window opening / closing position detecting device (100, 150) mounted on a vehicle (1) and detecting an opening / closing position of a window (10) opened / closed by an electric motor (20),
A driving load detector (101) for detecting a driving load of the electric motor;
A driving direction detector (102) for detecting a driving direction of the window by the electric motor;
A fully closed position detector (103) for detecting that the window is in a fully closed position when the drive load exceeds a predetermined fully closed threshold when the drive direction of the window is in the closed direction;
A fully open position detector (104) for detecting that the window is in a fully open position when the drive load exceeds a predetermined fully open threshold when the drive direction of the window is an open direction;
While the window is driven by the electric motor, the window opening / closing position is calculated on the assumption that the window moves at a predetermined moving speed in the driving direction, and the window is in the fully closed position or the fully opened position. A window opening / closing position detecting device comprising: an opening / closing position calculating unit (105) that calculates the opening / closing position of the window from the fully closed position or the fully opened position by initializing the opening / closing position. A window opening / closing position detecting device (100) according to claim 1,
A window opening / closing position detecting device comprising: a moving speed correcting unit (106) for correcting the moving speed based on the opening / closing position calculated when the fully closed position or the fully opened position is detected. . The window opening / closing position detection device according to claim 2,
The opening / closing position calculation unit
When the driving direction of the window is the closing direction, the opening / closing position is calculated using the moving speed in the closing direction,
When the driving direction of the window is the opening direction, the opening / closing position is calculated using the moving speed in the opening direction,
The moving speed correction unit is
Correcting the moving speed in the closing direction based on the opening and closing position when the fully closed position is detected;
The window opening / closing position detecting device, wherein the moving speed in the opening direction is corrected based on the opening / closing position when the fully opened position is detected. A window opening / closing position detecting device (150) according to claim 1,
After either one of the fully opened position or the fully closed position is detected, the fully opened / closed position required until the other of the fully opened position or the fully closed position is detected without interrupting the driving of the window. A timing unit (159) for measuring the time required;
A window opening / closing position detecting device comprising: a moving speed correcting unit (156) for correcting the moving speed based on the time required for full opening and closing. The window opening / closing position detection device according to claim 4,
The opening / closing position calculation unit
When the driving direction of the window is the closing direction, the opening / closing position is calculated using the moving speed in the closing direction,
When the driving direction of the window is the opening direction, the opening / closing position is calculated using the moving speed in the opening direction,
The time measuring unit obtains the time required for full opening and closing to reach the fully closed position from the fully opened position as a time required for full closing, and the fully opened and closed time required to reach the fully opened position from the fully closed position. The time required for closing is acquired as the time required for full opening.
The moving speed correction unit corrects the moving time in the closing direction based on the time required for full closing, and corrects the moving time in the opening direction based on the required time for full opening. . An opening / closing position detection device according to any one of claims 1 to 5,
An off state detector (107) for detecting that the start switch of the vehicle is turned off;
And a notifying unit (108) for notifying that the window is forgotten to be closed when the open / closed position of the window is opened by a predetermined threshold amount or more with respect to the fully closed position when the OFF state is detected. Open / close position detector. A window opening / closing position detection method applied to a vehicle (1) equipped with a window (10) that is opened and closed by an electric motor (20) to detect the opening / closing position of the window,
Detecting a driving load of the electric motor (S100);
Detecting the driving direction of the window by the electric motor (S102);
A step of detecting that the window is in a fully closed position when the drive load exceeds a predetermined fully closed threshold when the drive direction of the window is a closed direction (S101, S201);
A step of detecting that the window is in a fully open position when the drive load exceeds a predetermined full open threshold when the drive direction of the window is an open direction (S101, S201);
While the window is driven by the electric motor, the window opening / closing position is calculated on the assumption that the window moves at a predetermined moving speed in the driving direction, and the window is in the fully closed position or the fully opened position. A window opening / closing position detection method comprising: calculating the opening / closing position of the window from the fully closed position or the fully opened position by initializing the opening / closing position (S204, S207).

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