JP2011122369A - Power window device and method of control thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power window device and a method of control thereof which enable proper operation for coping with catching according to the position of a window glass at the time of detection of catching when catching of a foreign matter is detected during opening operation of the window glass. <P>SOLUTION: The power window device includes a motor 20 driving the window glass 11 to open and close, a rotation detecting device 27 outputting a pulse signal based on the movement of the window glass 11 which is driven by the motor 20 to open and close, and a controller 31 controlling the operation of the motor 20 and detecting catching of the foreign matter in the window glass 11 based on the pulse signal. The controller 31 computes the variation of descending speed of the window glass 11 based on the pulse signal, determines catching of the foreign matter by the window glass 11 based on the result of comparison between a predetermined computing result of the variation of the descending speed and a catching determining threshold value, and controls the supply of electric power to the motor 20 to stop progression of catching of the foreign matter by the window glass 11 according to the position of the window glass 11 at the time of determination of catching of the foreign matter. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a power window device and a control method thereof, and in particular, when the vehicle window glass is opened (that is, the window glass is lowered), foreign matter is caught between the window glass and the belt molding. The present invention relates to a power window device capable of detecting entrainment and a control method thereof.

2. Description of the Related Art Conventionally, in a power window device for a vehicle having a foreign matter pinching prevention function, there are many related to pinching prevention when closing a window glass (that is, raising the window glass) (see, for example, Patent Document 1).
That is, a conventional control device such as a power window device has a pinching prevention function that detects pinching when a foreign object is pinched during the closing operation and reverses the window glass by driving the motor in the reverse direction.

Japanese Patent Laying-Open No. 2007-9573 (page 4, FIG. 4)

  However, when the window glass is opened, there is no anti-roll-in function, so if the belt molding itself is caught by the window glass, a larger load than usual will be applied to the motor. Have occurred and the operating speed has been slow. Further, when a foreign object is caught between the belt molding and the window glass, there is a problem that the foreign object is damaged.

  On the other hand, if the window glass is simply raised when it is caught between the window glass and the belt molding, there is an inconvenience that pinching between the upper portion of the normal window frame and the window glass occurs. It was.

An object of the present invention is to provide a power window device and a control method for the power window device that can perform an action corresponding to the entrapment of foreign matter when the entrainment of the foreign matter is detected while the window glass is operating in the opening direction.
Another object of the present invention is to provide a power window device capable of appropriately responding to the entrainment according to the position of the window glass when the entrainment of the foreign object in the window glass is detected, and a control method thereof. is there.

  According to the power window device of the present invention, the subject is a power window device capable of preventing foreign objects from being caught in the window glass driven by operation of an operation switch, and a driving means for opening and closing the window glass; Control means for controlling the operation of the drive means, movement speed detection means for outputting a speed detection signal corresponding to the movement of the window glass that is opened and closed by the drive means, and foreign matter on the window glass based on the speed detection signal An entrainment detecting means for detecting entrainment of the windshield, and the entrainment detecting means calculates a change amount of the descending speed of the window glass based on the speed detection signal, and based on the calculated change amount of the descending speed. Based on the comparison result between the predetermined calculation result and the entrainment determination threshold value, the entrainment of the foreign matter by the window glass is determined, and the control means detects the entrainment detection. When the unit is to accept the inclusion of foreign materials, controlling the power supply to the drive means to the operation to stop the progression of the entrainment of foreign matters of the window glass, it is solved by.

  As described above, the present invention controls the power supply to the driving means so as to act to stop the progress of the foreign object entrainment when the entrainment of the foreign object is determined based on the amount of change in the descending speed of the window glass. Therefore, it is possible to stop the progress of the foreign object entrainment during the opening (lowering) operation of the window glass.

  At this time, it is preferable that the control means controls the power supply to the driving means so that the window glass rises or stops according to the position of the window glass at the time when the inclusion of foreign matter is determined. Thus, in order to stop the progress of the entrainment of the foreign matter according to the position of the window glass, it is possible to effectively cope with the position of the window glass, and at the same time, the window glass and the upper part of the window frame when the window glass ascends Can be effectively prevented.

Further, the control means, when the window glass is positioned at the fully open position side than the predetermined position set in advance at the time of the determination of the inclusion of foreign matter, in order to operate the window glass to the opening start position or a predetermined distance, It is preferable that the power supply to the driving means is controlled.
In this way, when the window glass is located on the fully open position side from the predetermined position set in advance, there is a distance between the window glass and the window frame, so the window glass rises and the upper part of the window frame Therefore, it is possible to control the window glass to operate up to a range where no pinching occurs. Moreover, by operating the window glass to the opening start position or a predetermined distance, even when the predetermined distance has not been reached, if the window starting position is reached, the operation of the window glass is stopped, thereby ensuring more safety. .

  Further, when the window glass is positioned closer to the fully closed position than a predetermined position when the foreign object is confirmed to be entrained, the control means supplies the driving means to stop the movement of the window glass. It is preferable to control the power supply. In this way, when the window glass is located on the fully closed position side from the predetermined position set in advance, the distance between the window glass and the window frame is small, so the progress of the entrainment is controlled by stopping control. While being able to block | prevent, the pinching between the window glass and window frame which may be produced by the raise of a window glass can be prevented.

Further, when the operation of operating the window glass in the opening direction is performed on the operation switch after the power supply is stopped, the control means supplies the driving means so that the window glass operates in the opening direction. It is preferable to control the power supply.
With such a configuration, after the power supply is stopped and the window glass stops, again, when the operation switch is operated to operate the window glass in the opening direction, the operator confirmed the presence or absence of entrainment, The window glass can be operated in the opening direction.

Further, it is preferable that the control unit performs a control to stop power supply to the driving unit when the entrainment detecting unit determines that the foreign object is entrained. In this case, since the window glass stops regardless of the position of the window glass, the entrainment of the window glass can be stopped.
Furthermore, it is preferable that the control means controls the power supply to the driving means so that the window glass rises by a predetermined amount when the entrainment detecting means determines that the foreign object is entrained. In this case, since the window glass rises by a predetermined amount regardless of the position of the window glass, the entrainment can be discharged.

  In addition, according to the control method of the power window device of the present invention, the problem is that the driving means for opening and closing the window glass, the control means for controlling the operation of the driving means, and the window driven to open and close by the driving means. A moving speed detecting means for outputting a speed detecting signal corresponding to the movement of the glass; and a wrapping detecting means for detecting the entanglement of the foreign matter on the window glass based on the speed detecting signal, and is driven by operation of an operation switch. A method for controlling a power window device capable of preventing foreign objects from being caught in a window glass, wherein the first step calculates a change amount of a window glass lowering speed based on the speed detection signal, and is calculated by the first step. A second step for performing a predetermined calculation based on the amount of change in the descending speed, a calculation result calculated in the second step, and an entrainment determination threshold value. A third step for determining the entrainment of the foreign matter by the window glass based on the comparison result, and an operation for stopping the progress of the entrainment of the foreign matter in the window glass when the entrainment of the foreign matter is confirmed in the third step. And a fourth step of controlling power supply to the driving means.

As for the control of power supply to the driving means performed in the fourth step, it is preferable to perform the following control. That is,
The window glass is raised or stopped according to the position of the window glass at the time when the foreign object is determined to be involved. When the window glass is positioned at the fully open position side with respect to the predetermined position set in advance when the foreign object is involved, the window glass is operated to the opening start position or a predetermined distance. If the window glass is positioned closer to the fully closed position than the predetermined position when the foreign object is involved, the movement of the window glass is stopped. When the operation switch is operated to operate the window glass in the opening direction after the power supply is stopped, the window glass is operated in the opening direction. The power supply to the driving means is stopped. The window glass is raised by a predetermined amount.
According to such a control method, it is possible to suitably control the power window device described above.

According to the power window device and the control method thereof of the present invention, when a foreign object or the like is caught when the window glass is opened, the power supply to the drive means is controlled in order to stop the foreign substance from being involved. As a result, it is possible to stop the progress of the foreign matter entrainment.
Further, as an operation for stopping the progress of the entrainment of the foreign matter, it is possible to prevent the foreign matter from being damaged by stopping or reversing and raising the window glass. At the same time, when the belt molding itself is caught when the window glass is opened, the window glass is stopped or turned upside down, thereby recognizing the system abnormality and prompting the user to replace the belt molding. It is possible to prevent such abnormalities (occurrence of abnormal noise, decrease in operating speed, etc.).
In addition, since the window glass is raised or stopped according to the position of the window glass when foreign object entrainment is detected (determined), effective entrainment corresponding to the position of the window glass is possible and the entrainment is detected. Thus, even when the window glass is raised, it is possible to effectively prevent the sandwiching between the window glass and the window frame.

It is explanatory drawing of the power window apparatus which concerns on one Embodiment of this invention. It is an electrical block diagram of the power window apparatus of FIG. FIG. 3 is a cross-sectional explanatory view taken along line III-III in FIG. 1. It is explanatory drawing of an entrainment determination process. It is a processing flowchart of entrainment determination. It is explanatory drawing of the rotational speed difference when a disturbance arises. It is a processing flowchart of an entrainment cancellation | release process.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the configurations, procedures, and the like described below do not limit the present invention, and various modifications can be made according to the spirit of the present invention.
1 to 7 relate to an embodiment of the present invention, FIG. 1 is an explanatory diagram of a power window device, FIG. 2 is an electrical configuration diagram of the power window device of FIG. 1, and FIG. FIG. 4 is an explanatory diagram of the entrainment determination process, FIG. 5 is an enumeration determination process flow diagram, FIG. 6 is an explanatory diagram of a rotational speed difference when a disturbance occurs, and FIG. 7 is an entrainment release process process. FIG.

Below, one Embodiment of the power window apparatus of this invention is described.
FIG. 1 is an explanatory diagram of a power window device 1 (hereinafter referred to as “device 1”) of the present embodiment, FIG. 2 is an electrical configuration diagram thereof, and FIG. 3 is a sectional explanatory diagram taken along line III-III of FIG. The apparatus 1 of this embodiment operates the window glass 11 arrange | positioned at the door 10 of a vehicle to raise / lower (open / close) by the rotational drive of the motor 20 which comprises a part of drive means 2. As shown in FIG. The apparatus 1 has as main components a driving means 2 for opening and closing the window glass 11, a control means 3 for controlling the operation of the driving means 2, and an operation switch 4 for commanding the operation by the occupant.

  The door 10 is a window that is lowered between an outer panel 15 disposed on the vehicle exterior side (vehicle width direction outer side) of the lower portion and an inner panel 16 disposed on the vehicle compartment side (vehicle width direction inner side). A storage space for storing the glass 11 is provided. Further, a window frame (glass frame) 12 is provided on the upper portion of the door 10, and the window glass 11 appears in the window frame 12 beyond the lower frame portion of the window frame 12 from within the storage space, and moves up and down. Operate.

  Belt moldings (belt moldings) 13 and 14 as seal members are mounted on the lower frame portion of the window frame 12. The belt molding includes an outer molding 13 and an inner molding 14. The outer molding 13 is fixed to the upper portion of the outer panel 15, and the inner molding 14 is fixed to the upper portion of the inner panel 16.

  The window glass 11 moves up and down in the window frame 12 through the gap between the outer molding 13 and the inner molding 14. The outer molding 13 and the inner molding 14 are respectively provided with sealing projections 13a, 13b, 14a, 14b projecting toward the window glass 11, and the sealing projections 13a, 13b, 14a, 14b are formed on the glass surface of the window glass 11. It comes to be elastically pressed.

  A weather strip (upper molding) (not shown) is similarly attached to the upper frame portion of the window frame 12 as a sealing member. The weatherstrip is formed with a groove that opens downward at its lower end. This groove is formed so that the upper end of the window glass 11 can be inserted by a predetermined length, and the glass surface of the upper end portion of the inserted window glass 11 is elastically pressed against the inner wall of the groove. ing.

In the present embodiment, the window glass 11 moves up and down along a rail (not shown) between an upper fully closed position (upper end) X1 and a lower fully open position (lower end) X2.
The driving means 2 of this embodiment includes a motor 20 having a speed reduction mechanism fixed to the door 10, a lifting arm 21 having a fan-shaped gear 21 a driven by the motor 20, and a lifting arm 21 crossing the lifting arm 21. The main component is a driven arm 22 to be supported, a fixed channel 23 fixed to the door 10, and a glass side channel 24 integrated with the window glass 11. The elevating arm 21, the follower arm 22, the fixed channel 23 and the glass side channel 24 constitute a drive mechanism of the drive means 2.

  The motor 20 according to the present embodiment is supplied with electric power from the control means 3 to energize the windings of the rotor, thereby generating a magnetic attraction action between the rotor and the stator having the magnet. Is configured to rotate forward and reverse. In the driving means 2 of the present embodiment, when the elevating arm 21 and the follower arm 22 swing according to the rotation of the motor 20, their end portions are subjected to sliding restriction by the channels 23 and 24 and are driven as an X link. Then, the window glass 11 is moved up and down.

  The motor 20 of this embodiment is integrally provided with a rotation detection device 27 as a moving speed detection means. The rotation detection device 27 outputs a pulse signal (speed detection signal) synchronized with the rotation of the motor 20 to the control means 3. The rotation detection device 27 of the present embodiment is configured to detect a magnetic change of a magnet that rotates together with the output shaft of the motor 20 with a plurality of Hall elements. With such a configuration, the rotation detection device 27 outputs a pulse signal synchronized with the rotation of the motor 20. That is, the pulse signal is output for each predetermined movement amount of the window glass 11 or for each predetermined rotation angle of the motor 20. Thereby, the rotation detection device 27 can output a signal corresponding to the movement of the window glass 11 which is substantially proportional to the rotation speed of the motor 20. And the control means 3 counts a pulse edge from the pulse signal from the rotation detector 27, and detects the position of the window glass 11 from the pulse count value. In the present embodiment, the rotation detection device 27 and the control means 3 constitute position detection means.

  In the present embodiment, the rotation detection device 27 using a Hall element is employed. However, the present invention is not limited to this, and an encoder may be employed as long as the rotation of the motor 20 can be detected. Moreover, in this embodiment, in order to detect rotation of the output shaft of the motor 20 according to the movement of the window glass 11, the rotation detection device 27 is integrally provided in the motor 20, but not limited to this, a publicly known You may make it detect the position of the window glass 11 directly by a means.

The control means 3 of this embodiment includes a controller 31 and a drive circuit 32. The controller 31 and the drive circuit 32 are supplied with electric power necessary for operation from a battery 5 mounted on the vehicle.
The controller 31 of the present embodiment is configured by a microcomputer including a memory such as a CPU, ROM, and RAM, an input circuit, an output circuit, and the like. The CPU is connected to the memory, input circuit, and output circuit via a bus. The controller 31 is not limited to this, and may be configured by a DSP or a gate array.

  The controller 31 normally opens and closes the window glass 11 by rotating the motor 20 forward and backward via the drive circuit 32 based on the operation signal from the operation switch 4. The controller 31 detects the position of the window glass 11 based on the pulse signal received from the rotation detection device 27, and the drive power supplied to the motor 20 via the drive circuit 32 according to the detected position of the window glass 11. Adjust the size. Specifically, the magnitude of the drive voltage or the duty ratio is adjusted in the case of PWM control. Thereby, the motor output is adjusted.

  The drive circuit 32 of the present embodiment is configured by an IC having an FET, and switches the polarity of power supply to the motor 20 based on an input signal from the controller 31. That is, when receiving a forward rotation command signal from the controller 31, the drive circuit 32 supplies power to the motor 20 so as to rotate the motor 20 in the forward rotation direction, and receives a reverse rotation command signal from the controller 31. Supplies electric power to the motor 20 so as to rotate the motor 20 in the reverse rotation direction. Further, when the rotation stop command signal is received from the controller 31, the power supply to the motor 20 is stopped. The drive circuit 32 may be configured to switch the polarity using a relay circuit. Alternatively, the drive circuit 32 may be incorporated in the controller 31.

  The controller 31 detects the rising and falling portions (pulse edges) of the pulse signal from the input pulse signal, and calculates the rotational speed (rotation cycle) of the motor 20 based on the interval (cycle) of the pulse edges. At the same time, the rotational direction of the motor 20 is detected based on the phase difference between the pulse signals. That is, the controller 31 indirectly calculates the movement speed of the window glass 11 based on the rotation speed (rotation period) of the motor 20 and specifies the movement direction of the window glass 11 based on the rotation direction of the motor 20. . The controller 31 counts pulse edges. This pulse count value is added or subtracted with the opening / closing operation of the window glass 11. The controller 31 specifies the opening / closing position of the window glass 11 based on the magnitude of the pulse count value.

That is, in the present embodiment, the window glass 11 can be driven with the fully closed position X1 as a reference position. When the fully closed position X1 is used as the reference position, the pulse count value is set to “0” at the fully closed position X1. Then, after setting the pulse count value to be “0” at the reference position in this way, when the window glass 11 is moving toward one end side of the operation region (operation section), for example, the fully open position X2, the pulse is generated. Each time a signal is received, the pulse count value is incremented by 1. When the window glass 11 is moving toward the other end of the operating region, that is, toward the fully closed position X1, the pulse count value is decremented by 1 each time a pulse signal is received.
Note that the window glass 11 may be driven with the fully open position X2 as a reference position. In this case, the pulse count value is set to “0” at the fully opened position X2, and the pulse count value is incremented when the window glass 11 is moving in the direction of the fully closed position X1, so that the fully opened position is reached. The pulse count value may be decremented when the window glass 11 is moving in the X2 direction.

The operation switch 4 of the present embodiment is configured by a swing type switch that can be operated in two steps, and has an open switch, a close switch, and an auto switch. When the occupant operates the operation switch 4, a command signal for opening and closing the window glass 11 is output to the controller 31.
Specifically, when the operation switch 4 is operated in one step toward one end, the opening switch is turned on, and the window glass 11 is normally opened (that is, opened only during operation) and is operated in the opening direction. The normal opening command signal is output to the controller 31. Further, when the operation switch 4 is operated one step to the other end side, the closing switch is turned on, and a normal closing command signal for normally closing the window glass 11 (that is, closing only during operation) is supplied to the controller. To 31.

  When the operation switch 4 is operated in two steps toward one end, both the opening switch and the auto switch are turned on, and the window glass 11 is automatically opened (that is, the opening operation is performed up to the position immediately before the fully opened position X2). Then, an automatic opening command signal for operating in the opening direction is output to the controller 31. Further, when the operation switch 4 is operated in two steps toward the other end, both the closing switch and the auto switch are turned on, and the window glass 11 is automatically closed (that is, closes to a position immediately before the fully closed position X1 even if the operation is stopped). An auto close command signal for operation) is output to the controller 31.

While receiving the normal opening command signal from the operation switch 4 (while the operation switch 4 is being operated), the controller 31 drives the motor 20 via the drive circuit 32 to normally open the window glass 11. Let On the other hand, the controller 31 drives the motor 20 via the drive circuit 32 while receiving the normal close command signal from the operation switch 4 (while the operation switch 4 is being operated), so that the window glass 11 is Close operation.
When the controller 31 receives an auto-open command signal from the operation switch 4, the controller 31 drives the motor 20 via the drive circuit 32 to automatically open the window glass 11 to a position immediately before the fully-open position X2. On the other hand, when receiving an auto close command signal from the operation switch 4, the controller 31 drives the motor 20 via the drive circuit 32 to cause the window glass 11 to automatically close to the position immediately before the fully closed position X1.

The controller 31 in the present embodiment monitors whether or not the window glass 11 is caught when the window glass 11 is opened (normally opened and automatically opened). That is, when the entrainment occurs, the moving speed (lowering speed) of the window glass 11 and the rotational speed of the motor 20 are reduced in association with this (the rotational cycle becomes longer). For this reason, the controller 31 of the present embodiment constantly monitors fluctuations in the rotational speed of the motor 20.
In the controller 31 of the present embodiment, based on the fluctuation of the rotational speed of the motor 20 (that is, the descending speed of the window glass 11), first, the start of entrainment is detected between the window glass 11 and the belt moldings 13 and 14, Next, when it is detected that the rotational speed has changed by a predetermined amount after the start of the winding is detected, it is determined (determined) that the winding is involved.

When the entrainment is confirmed, the controller 31 releases the foreign matter entrained between the window glass 11 and the belt moldings 13 and 14, that is, in order to operate to stop the entrainment of the motor 20. The supply of electric power to the motor is controlled to stop or reverse the operation of the motor 20, and the opening operation (lowering) of the window glass 11 is stopped or the window glass 11 is closed (raised) by a predetermined distance (predetermined amount). (Release process).
If the window glass 11 is raised by simply reversing the operation of the motor 20 when the entrainment is detected (determined), pinching between the window glass 11 and the upper part of the window frame 12 may occur. In the present embodiment, the operation corresponding to entrainment (the entrainment release process) is distinguished and controlled according to the position of the window glass 11 when the entrainment is detected (confirmed). As described above, the controller 31 specifies the position of the window glass 11 based on the magnitude of the pulse count value.

For example, in this embodiment, as shown in FIG. 1, the operating area (operating section) of the window glass 11 is divided into two areas at a predetermined position Y, and the window A 11 and the window glass 11 have a small opening amount. Are divided into regions B having large opening amounts.
And when the position of the window glass 11 is the area | region A when entrainment is detected, ie, when located in the fully closed position X1 side rather than the predetermined position Y, the opening amount of the window glass 11 is small. Since the degree of the entanglement is shallow and it is predicted that there is a possibility of secondary damage in which other foreign matters are sandwiched between the window glass 11 and the window frame 12 by raising the window glass 11, the operation of the motor 20 Is stopped and only the window glass 11 is stopped.

  On the other hand, when the position of the window glass 11 is the region B when the entrainment is detected, that is, when the window glass 11 is located at the fully open position X2 side than the predetermined position Y, the opening amount of the window glass 11 is large. The degree of entrainment is deep, and even if the window glass 11 is raised slightly, there is no possibility of secondary damage where other foreign substances are sandwiched between the window glass 11 and the window frame 12, so the operation of the motor 20 is stopped. After the window glass 11 is stopped, the motor 20 is operated in reverse so that the window glass 11 is slightly inverted and raised. At this time, a predetermined amount of reverse drive distance L1 for raising and lowering the window glass 11 is set in advance, but even when the preset reverse drive distance L1 is not reached, the opening (lowering) start position P0. If the reverse drive of the motor 20 is stopped when reaching the value, safety can be further ensured.

  Next, based on FIG. 4, the outline process of the entrainment determination in the apparatus 1 of this embodiment is demonstrated. In the power window device 1 of the present embodiment, the controller 31 calculates the rotation speed ω of the motor 20 based on the pulse signal received from the rotation detection device 27 and stores the calculated rotation speed ω in the RAM. FIG. 4A shows the fluctuation state of the rotational speed ω calculated in this way. The vertical axis in FIG. 4A corresponds to the motor rotation speed, and the horizontal axis corresponds to the pulse count number. The example of FIG. 4 (A) is a situation where the rotational speed ω of the motor 20 is decelerated halfway due to entrainment. The data line A1 shows a situation in which a hard object is involved and the rotational speed ω is decreasing at a large reduction rate, and the data line B1 is an example in which a soft object is involved and the rotational speed ω is decreasing at a small deceleration rate. Indicates the situation. FIGS. 4B and 4C correspond to the case where the data lines A2 and A3 involve a hard object, and correspond to the case where the data lines B2 and B3 include a soft object.

  In the apparatus 1 of this embodiment, the movement speed fluctuation value calculation is performed by a CPU (not shown). Based on the data of the rotation speed ω, the current rotation speed ω and the rotation speed ω several pulse edges before are calculated. A rotational speed difference Δω that is the difference is calculated. That is, the fluctuation value of the current rotational speed ω with respect to the rotational speed ω several pulses before is calculated. The rotational speed difference Δω corresponds to the rate of change of the rotational speed (moving speed) (or corresponds to the amount of change or the amount of change in the rotational speed from several pulse edges before). FIG. 4B shows the fluctuation state of the rotational speed difference Δω. In FIG. 4A, it can be seen that the absolute value of the rotational speed difference Δω is larger in the data line A1 than in the data line B1.

  First, the controller 31 as the entrainment detecting means for detecting the start of entrainment determines whether or not the rotational speed difference Δω calculated in this way exceeds the variation determination threshold value α. When the fluctuation determination threshold value α is exceeded, it is determined that the winding has started. In FIG. 4B, the start of entrainment is detected at points P1 and P2, respectively. However, since the entrainment has not been confirmed at this point, the motor 20 continues to rotate and the window glass 11 continues to descend (open operation). The variation determination threshold value α is set to a magnitude such that the rotational speed difference Δω caused by the apparatus 1 exceeds this value even when the apparatus 1 is soft (for example, a lip portion of a belt molding). Is done.

  In this way, once the start of the entrainment is detected, in the apparatus 1, the controller 31 that determines the entrainment indicates that the accumulated value of the rotational speed difference Δω from this point in time (that is, the amount of change in the rotational speed ω). Then, it is determined whether or not the entrainment determination threshold value β has been exceeded. When the amount of change in the rotational speed ω exceeds the entrainment determination threshold value β, entrainment is detected (determined). FIG. 4C shows the fluctuation state of the accumulated value of the rotational speed difference Δω. The controller 31 determines (confirms) the entrainment when the accumulated value exceeds the entrainment determination threshold value β.

  In addition, as described above, when the cumulative value of the rotational speed difference Δω after the start of the winding is detected (that is, the amount of change in the rotational speed ω) exceeds the winding determination threshold value β, the winding is detected. Instead of (determining), the cumulative value of the rotational speed difference Δω for a predetermined period after the start of the entrainment is detected, or the cumulative value of the rotational speed difference Δω for a predetermined number (that is, in these cases, the rotation If the rate of change in the speed ω exceeds the entrainment determination threshold value β, the entrainment may be detected (determined).

As described above, in the device 1 of the present embodiment, two threshold values are set, but one fluctuation determination threshold value α is set for the rotational speed difference Δω, and the other entrainment determination is performed. The threshold value β is set with respect to the amount of change in the rotational speed ω (the sum of the rotational speed differences Δω), and these are subject to determination.
In the apparatus 1 according to the present embodiment, it is not determined that the actual winding has occurred due to the duration after the rotation speed difference Δω exceeds the fluctuation determination threshold value α, the number of pulse signals, and the like. Entrainment is determined by the amount of fluctuation of the rotational speed ω after the difference Δω exceeds the fluctuation determination threshold value α.

Therefore, in the apparatus 1 of the present embodiment, when a foreign object is entrained, the entrainment load does not become excessively large, so that the entrainment can be confirmed without damaging the entrained foreign object.
Further, in the apparatus 1 of the present embodiment, even when a soft object is involved, the rotational speed difference Δω exceeds the fluctuation determination threshold value α at a relatively early stage. Engagement is confirmed when β is exceeded. In this case, for example, because the lip portion of the belt molding is soft, the rotational speed difference Δω does not become a small value (a large value as an absolute value), but once the fluctuation determination threshold α is exceeded, Since the accumulation of the rotational speed difference Δω is started, the entrainment can be reliably determined when the accumulated value exceeds the entrainment determination threshold value β.

In addition, even when a medium-hard material is involved, the rotational speed difference Δω exceeds the fluctuation determination threshold value α at an early stage, and the rotational speed difference Δω is accumulated, as is the case with a soft material. Is started, it is possible to reliably determine the entrainment when this value exceeds the entrainment determination threshold value β.
Thus, in the apparatus 1 of this embodiment, the entrainment can be reliably determined with a low load regardless of the hardness or softness of the entrainment.

  In addition, when the window glass 11 moves, the rotational speed of the motor 20 is affected by sliding resistance and external factors even if it is not caught. As a result, even if the rotational speed difference Δω exceeds the fluctuation determination threshold value α, if the accumulated value of the rotational speed difference Δω does not exceed the entrainment determination threshold value β, the entrainment is determined. Therefore, even if the variation determination threshold value α is set to a value for when a soft object is involved, an erroneous determination is not caused, but rather the start of entrainment can be reliably detected.

Next, the entrainment determination process of the controller 31 of this embodiment will be described based on FIG.
First, the controller 31 of the present embodiment updates the rotational speed data of the motor 20 based on the pulse signal received from the rotation detection device 27 (step S1). Specifically, the controller 31 first detects a pulse edge by performing signal processing on the pulse signal received from the rotation detection device 27. Each time a pulse edge is detected, a pulse width (time interval) T between the pulse edge detected last time and the pulse edge detected this time is calculated and sequentially stored in the memory.

  In the present embodiment, the pulse width T is updated in order every time a new pulse edge is detected, and the latest four pulse widths T (0) to T (3) are stored. In other words, when a pulse edge is detected, a new pulse width T (0) is calculated, and the previous pulse widths T (0) to T (2) are shifted by 1 to respectively change the pulse widths T (1) to T (T). Store as (3) and erase the previous pulse width T (3).

Then, the controller 31 calculates the rotational speed ω from the reciprocal of the sum (pulse period P) of the pulse width T of n pulse edges that are continuous in time. This rotational speed ω is a value proportional to the actual rotational speed.
In the present embodiment, the (average) rotational speed ω (0) is calculated from the pulse widths T (0) to T (3) from the current pulse edge to the previous four pulse edges. When the next pulse edge is detected, the rotational speed ω (0) is updated with the newly calculated pulse widths T (0) to T (3). At this time, the previous rotational speed ω (0) is stored as the rotational speed ω (1). In this way, the latest eight rotation speeds ω (0) to ω (7) that are updated each time a pulse edge is detected (every predetermined movement amount or every predetermined rotation angle) are stored in the controller 31. Always remembered. In this way, by calculating the rotational speed ω using the plurality of pulse widths T, it is possible to cancel the variation in the sensor duty of each received pulse signal output and calculate the rotational speed in which the error variation is cancelled.

  Next, the controller 31 calculates an (average) rotational speed difference (rotational speed change rate) Δω from the rotational speed ω (step S2). Specifically, the rotational speed ω (0) to ω (3) is the current block data, the rotational speed ω (4) to ω (7) is the previous block data, and the process of subtracting the sum of the data in each block is performed. ing. That is, the rotational speed difference Δω is calculated by subtracting the sum of the rotational speeds ω (0) to ω (3) from the sum of the rotational speeds ω (4) to ω (7), and every time a pulse edge is detected ( It is updated every predetermined movement amount or every predetermined rotation angle. The calculated value may be divided by the number of data (4 in this embodiment). Thus, the phase difference between the rotational speeds ω can be canceled by calculating the rotational speed difference Δω using a plurality of rotational speeds ω.

And the controller 31 of this embodiment adds the rotational speed difference (DELTA) omega calculated on the basis of the predetermined position of the window glass 11 (step S3). Every time the rotational speed difference Δω is calculated, this difference is accumulated to calculate the difference in rotational speed ω with respect to the reference position.
Next, it is determined whether or not the calculated rotational speed difference Δω exceeds the disturbance determination threshold value γ on the positive side (step S4). When the vehicle rides on a step or the window glass 11 is closed, an impact is applied to the window glass 11 due to such disturbance, and as a result, the rotational speed of the motor 20 may be affected. In the present embodiment, this process prevents erroneous detection of entrainment due to disturbance.

  As shown in FIG. 6, when a disturbance is applied, the rotational speed difference Δω usually takes a large value in positive and negative. The fact that the rotational speed difference Δω swings to the positive side means that the rotation of the motor 20 is accelerated in the direction of opening the window glass 11, and conversely, that the rotational speed difference Δω swings to the negative side means that It means that the rotation is decelerated. The fluctuation of the rotational speed difference Δω on the negative side simulates entrainment. Here, the disturbance determination threshold value γ is a value set on the positive side. In the controller 31 of the present embodiment, when the rotational speed difference Δω exceeds the disturbance determination threshold value γ on the positive side, It is determined that a disturbance has occurred.

  When it is determined that a disturbance has occurred (step S4; present), the controller 31 increases the entrainment determination threshold value β to the negative side (step S7), and then proceeds to step S8. As a result, even if the rotational speed difference Δω is swung to the negative side due to disturbance and the start of entrainment is detected, the cumulative value of the subsequent rotational speed difference Δω exceeds the entrainment determination threshold value β. Therefore, it is possible to prevent erroneous determination of entrainment. In this embodiment, the disturbance determination threshold value γ is set regardless of the fluctuation determination threshold value α. For example, the disturbance determination threshold value γ is set so that the positive / negative of the fluctuation determination threshold value α is reversed. It may be set to a value.

If it is not determined in step S4 that a disturbance has occurred (step S4; no), the controller 31 performs a process for determining the start of entrainment (step S5). Specifically, when the rotational speed difference Δω exceeds the fluctuation determination threshold value α on the negative side, it is determined that the entrainment is started, and when it does not exceed, the start of the entrainment is not determined.
When it is determined that the entrainment is started (step S5; present), the process proceeds to step S8. On the other hand, when it is not determined that the entrainment is started (step S5; none), an accumulated value of the rotational speed difference Δω and an initial value for the entrainment determination threshold value β are set in step S6. Specifically, the accumulated value of the rotational speed difference Δω calculated in step S3 is returned with is set to the initial variation S ₀ of the rotation speed omega, the normal value determination threshold β is not increased entrainment It is. Thus, when it is determined that the disturbance period has ended, the entrainment determination threshold value β is returned to the normal value, and normal processing is performed.

In step S8, a calculation process of the change amount S of the rotational speed ω is performed. Specifically, the controller 31 calculates the rotational speed calculated in step S3 from the initial change amount S ₀ (cumulative value of the rotational speed difference Δω) of the rotational speed ω set in step S6 immediately before it is determined that the entrainment is started. By subtracting the cumulative value of the difference Δω, the amount of change S of the rotational speed ω after the start of winding (the cumulative value of the rotational speed difference Δω) is calculated. As a result, the amount of change in the rotational speed due to entrainment (that is, the entrainment load) can be reliably calculated.

  In this embodiment, the difference in the amount of change from the reference value is calculated to calculate the amount of change in the rotational speed ω after the start of the entrainment. However, the present invention is not limited to this. The accumulated value of the speed difference Δω is initialized, and when the entrainment start is detected, it is not initialized, and the rotation speed difference Δω is accumulated only for the portion after the entrainment start detection, thereby the amount of change in the rotation speed ω. May be calculated.

Next, the controller 31 determines whether or not the change amount S of the rotational speed ω calculated in step S8 exceeds the entrainment determination threshold value β (step S9).
When it is determined that the change amount S of the rotational speed ω exceeds the entrainment determination threshold β (step S9; present), an entrainment release process (step S10) is performed, and the process is terminated.
On the other hand, when it is determined that the change amount S of the rotational speed ω does not exceed the entrainment determination threshold value β (step S9; no), the processing is ended as it is.

Next, the entrainment release process (step S10) will be described with reference to FIG.
When it is determined in step S9 of the entrainment determination process shown in FIG. 5 that there is entrainment, that is, when it is determined that entrainment occurs, this entrainment release process is executed, and the controller 31 moves between the window glass 11 and the belt moldings 13 and 14. The power supply to the motor 20 is controlled in order to perform the operation to stop the progress of the foreign object.
Note that the positions of the operation areas A and B of the window glass 11 (the position of the predetermined position Y that is the boundary line between the areas A and B) are set in advance as values corresponding to the pulse count value. In addition, a predetermined distance for reversely driving the motor 20 at the time of entrainment detection is set in advance as a reverse drive distance L1 with a value corresponding to the pulse count value. These set values are stored in a memory such as a ROM. Further, the controller 31 stores an opening (downward) start position P0 when the window glass 11 is opened in a memory such as a RAM.

First, the controller 31 specifies the winding detection position P1 that is the position of the window glass 11 when the winding is confirmed based on the pulse count value when the winding is confirmed, and the winding detection position P1 is an area shown in FIG. It is determined whether it is located at A or other than that (step S11).
When it is determined that the entrainment detection position P1 is located in the region A, that is, when it is located closer to the fully closed position X1 than the predetermined position Y (step S11; Yes), the process proceeds to step S14, and the controller 31 performs control to stop the supply of electric power to the motor 20, stops the driving of the motor 20, stops the opening operation of the window glass 11, and returns to the entrainment determination process shown in FIG.

  On the other hand, when it is determined that the entrainment detection position P1 is located outside the area A (that is, the area B), that is, when it is located closer to the fully open position X2 than the predetermined position Y (step S11; No), the controller 31 temporarily stops the drive of the motor 20 and then controls the supply of electric power to the motor 20 so as to perform reverse rotation drive (upward drive) to raise the window glass 11 (step S12).

Thereafter, it is determined whether the rising distance of the window glass 11 has reached the reverse drive distance L1 or whether the window glass 11 has reached the opening (lowering) start position P0 (step S13). If none of these are applicable (step S13; No), the process returns to step S12 to perform reverse drive, and the reverse drive process is repeated until any of the conditions is satisfied in step S13.
When the rising distance of the window glass 11 has reached the reverse drive distance L1 or at least one of the window glass 11 has reached the opening (downward) start position P0 (step S13; Yes), the controller 31. Performs control to stop the supply of power to the motor 20, stops the driving of the motor 20, stops the opening operation of the window glass 11, and returns to the entrainment determination process shown in FIG. In this way, even when the reverse drive distance L1 is not reached, when the release start position P0 is reached, the reverse drive is stopped, so that safety can be further ensured.

  As described above, according to the present invention, the entrainment of foreign matter between the window glass 11 and the belt moldings 13 and 14 is detected during the opening operation of the window glass 11, and the opening operation (lowering) of the window glass 11 is stopped or By controlling the window glass 11 to be closed (raised) by a predetermined amount, it is possible to prevent the foreign matter from being damaged. Further, it becomes possible to detect the entrainment of the belt moldings 13 and 14 itself, so that the user can be aware of the system abnormality and prompt the user to replace the belt moldings 13 and 14. , Reduction in operating speed, etc.) can be prevented in advance.

  Moreover, in this invention, according to the position of the window glass 11 when the entrainment of the foreign material between the window glass 11 and the belt moldings 13 and 14 is detected, a different effective entrainment operation (entraining release process) is performed. Thus, it is possible to effectively prevent pinching with the window frame 12 when the window glass 11 is raised.

In the above embodiment, when the position of the window glass 11 at the time of entrainment detection is in the region A, the window glass 11 is controlled to stop, and in the case of the region B, the reverse drive control is performed. At times, control may be performed to stop the supply of electric power so that the window glass 11 is stopped in the entire operation region of the window glass 11.
Further, when the entrainment is detected, it may be controlled to supply electric power so that the window glass 11 is slightly inverted and raised in the entire operating range of the window glass 11.

  Furthermore, in the said embodiment, when the position of the window glass 11 at the time of entrainment detection is the area | region B, after stopping the movement of the window glass 11, it controls to raise small, but the movement stop of the window glass 11 Thereafter, when the operation switch 4 is operated to operate the window glass 11 in the opening direction, the power supply to the driving means 2 is controlled so that the window glass 11 operates in the opening direction. it can.

Moreover, in the said embodiment, although the fluctuation | variation determination threshold value (alpha), the entrainment determination threshold value (beta), and the disturbance determination threshold value (gamma) were set to the constant value irrespective of the position of the window glass 11, it is not restricted to this, A window glass It may be set so as to vary depending on the position of 11.
Moreover, although the said embodiment demonstrated as the power window apparatus 1 of a vehicle, the power window apparatus is applicable to the apparatus which opens and closes opening / closing members, such as a sunroof opening / closing apparatus and a sliding door opening / closing apparatus.

DESCRIPTION OF SYMBOLS 1 ... Power window apparatus (device), 2 ... Driving means, 3 ... Control means, 4 ... Operation switch,
5 ... Battery, 10 ... Door, 11 ... Window glass, 12 ... Window frame,
13. Outer molding (belt molding), 13a, 13b: Seal protrusion,
14 ... inner molding (belt molding), 14a, 14b ... sealing protrusion,
15 ... Outer panel, 16 ... Inner panel,
20... Motor, 21... Lifting arm, 21a... Gear, 22.
23 ... Fixed channel, 24 ... Glass side channel,
27: Rotation detection device, 31: Controller, 32: Drive circuit

Claims (14)

A power window device capable of preventing foreign objects from being caught in a window glass driven by operation of an operation switch,
Drive means for opening and closing the window glass, control means for controlling the operation of the drive means, movement speed detection means for outputting a speed detection signal according to the movement of the window glass driven to open and close by the drive means, An entrainment detecting means for detecting entrainment of foreign matter in the window glass based on the speed detection signal,
The entrainment detecting means calculates a change amount of the window glass descending speed based on the speed detection signal, and compares a predetermined calculation result based on the calculated descending speed change amount and an entrainment determination threshold value. As a result, the entrapment of foreign matter by the window glass is confirmed,
The control means controls the power supply to the driving means so as to stop the progress of the foreign object entrainment of the window glass when the entrainment detecting means determines the foreign object entrainment. Power window device.   2. The power window according to claim 1, wherein the control unit controls power supply to the driving unit so that the window glass is raised or stopped according to a position of the window glass at the time when the inclusion of the foreign object is confirmed. apparatus.   When the window glass is located at a fully open position side with respect to a preset predetermined position at the time of confirming the entrainment of foreign matter, the control means is configured to drive the window glass to an opening start position or a predetermined distance. 3. The power window device according to claim 2, wherein power supply to the means is controlled.   When the window glass is located on the fully closed position side with respect to a preset predetermined position at the time of confirming the entrapment of the foreign object, the control means supplies power to the drive means to stop the movement of the window glass. 3. The power window device according to claim 2, wherein supply is controlled.   The control means supplies power to the driving means so that when the operation switch is operated to operate the window glass in the opening direction after the power supply is stopped, the window glass operates in the opening direction. The power window device according to claim 3, wherein the power window device is controlled.   2. The power window device according to claim 1, wherein the control unit performs control to stop power supply to the driving unit when the entrainment detection unit determines that the foreign object is entrained. 3.   2. The power window device according to claim 1, wherein the control unit controls power supply to the driving unit so that the window glass rises by a predetermined amount when the entrainment detection unit determines that the foreign object is entrained. . A driving means for opening and closing the window glass; a control means for controlling the operation of the driving means; a moving speed detecting means for outputting a speed detection signal corresponding to the movement of the window glass driven to open and close by the driving means; A method for controlling a power window device capable of preventing foreign objects from being caught in a window glass driven by operation of an operation switch. ,
A first step of calculating a change amount of the window glass descending speed based on the speed detection signal;
A second step of performing a predetermined calculation based on the amount of change in the descending speed calculated in the first step;
A third step of determining the inclusion of foreign matter by the window glass based on the comparison result between the calculation result calculated in the second step and the entrainment determination threshold;
A fourth step of controlling the power supply to the driving means so as to stop the progress of the entrapping of the foreign matter on the window glass when the foreign matter has been caught in the third step. A control method for a power window device.   9. The power according to claim 8, wherein the control of power supply to the driving means performed in the fourth step raises or stops the window glass according to the position of the window glass at the time when the foreign object is confirmed to be involved. Window device control method.   The control of power supply to the driving means performed in the fourth step is to start opening the window glass when the window glass is located at a fully opened position side with respect to a predetermined position set in advance when the foreign object is confirmed to be involved. 9. The method of controlling a power window device according to claim 8, wherein the power window device is operated to a position or a predetermined distance.   The control of the power supply to the driving means performed in the fourth step is to move the window glass when the window glass is positioned closer to the fully closed position than a predetermined position set in advance when the foreign object is caught. 9. The method for controlling a power window device according to claim 8, wherein the control is stopped.   The control of the power supply to the driving means performed in the fourth step is such that when the operation switch is operated in the opening direction after the power supply is stopped, the window glass is opened in the opening direction. The method for controlling a power window device according to claim 10, wherein the power window device is operated.   9. The method of controlling a power window device according to claim 8, wherein the control of power supply to the drive means performed in the fourth step stops power supply to the drive means. 9. The method of controlling a power window device according to claim 8, wherein the control of power supply to the driving means performed in the fourth step raises the window glass by a predetermined amount.

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