JPS6160981A - Opening and closing control apparatus of window - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to, for example, an opening/closing control device for a power window device of an automobile, and in particular improves safe operation characteristics when the window glass is closed. This invention relates to a window opening/closing control device.

[Background Art] For example, in the case of a power window for an automobile, an electric motor connected to the window glass is controlled to rotate in the forward or reverse direction to drive the window glass upward in the direction of closing (tJP) t, ,, descending drive in the opening direction (DO
WN>. The electric motor that controls opening and closing of the window glass is controlled by an operation switch tiltlit that specifies the rising direction and the descending direction. However, when such a window opening/closing device performs the closing operation to close the window glass, if a foreign object is caught between the window glass and the window frame, the window glass It is necessary to stop the lifting operation of the foreign object, but if the operator is operating the glass using only the operation switch, there may be cases where the user does not notice that the foreign object is caught.

[Problems to be Solved by the Invention] This invention has been made in view of the above-mentioned points. If the window glass is caught in the window, stop the window 1.
The present invention aims to provide a window opening/closing control device that can effectively remove the foreign matter.

Further, in the present invention, even if the resistance state in the moving operation of the window glass changes due to changes over time, for example, an abnormal state during the closing operation of the window glass can be reliably detected. Therefore, it is an object of the present invention to provide a window opening/closing control device that can effectively cancel the abnormality.

Means for Solving Problem E] That is, in the window opening/closing IbIJ control device according to the present invention, a dangerous area where there is a possibility of foreign objects being caught during the window closing operation is set, and The dangerous area is divided and set into a plurality of areas, and a comparison standard ii current value is read from the load current value of the electric motor that drives the window and is stored and set while learning, corresponding to each divided area. During the closing operation of the window, the motor load current value is detected corresponding to each of the divisions W411 and compared with the reference current value stored in the memory for each division area, and the detected load current value is In a state where the current value exceeds the reference current value by a specified amount or more, an abnormal state such as a foreign object being caught is detected and control to stop the closing operation of the window is executed.

[Function] In the window opening/closing control device configured as above,
When the window closing operation is normally executed, and the window closing movement section is subdivided, the electric motor is loaded 'i!' corresponding to each divided area. A comparison reference value for the i-flow value is set in learning memory. Therefore, the load change state corresponding to the moving position of the window, which corresponds to the state of the window movement mechanism at that time, is always stored and set as a comparison reference value, and this learned reference value and the electric rock load The current value is compared during the window closing operation. Therefore, if a load different from the steady state is applied to the window, especially during the window closing operation, it can be reliably detected, and it is possible to detect changes in frictional resistance over time in the window drive mechanism, etc. Even if the changing state occurs, the window opening/closing control operation is executed while reliably detecting and learning the changing state.

[Example] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows, for example, a drive control circuit for an automobile window glass. The supply of Vc is controlled via the relay switch 12a or 13a, and this electric motor 11 raises the window glass (tJP) in response to the ON state of the relay switch 12a or 13a.
) direction or the downward (DOWN) direction. Above relay switch 1
2a and 13a are the relay coil 12b, respectively.
13b is closed by supplying an excitation current to the relay coil 12b! The excitation 1i1j currents for 3 and 13b are controlled switching by transistors 14 and 15, respectively.

Further, a load current detection circuit 17 with a resistor of 1G is set for the electric bench 11. The φ voltage signal corresponding to the load current detected by the load laminar flow detection circuit 17 is appropriately amplified by the amplifier 18 and converted into a digital signal by the A/D converter 19, which is then supplied to the control circuit 20. . Further, a voltage signal corresponding to the load current obtained from the amplifier 18 is supplied to a peak hold circuit 21. The peak hold circuit 21 performs a memory holding operation of the peak level of the detected voltage signal in response to a command from the control circuit 20, and stores peak level information up to that point in response to a command from the control circuit 20. is output, and the subsequent peak level detection operation is executed again. The output signal from this peak hold circuit 21 is converted into a digital signal by an A/D converter 22 and supplied to the control circuit 20.

The control circuit 20 is provided with an operation signal from an operation switch 23 that generates a window glass opening/closing control command. This switch 23 includes an a contact point that specifies the closing direction of the window glass, and a b contact point that specifies the opening direction. Further, a position detection mechanism 24, such as a potentiometer, for detecting the moving position of the window glass is set, and the detection signal from this position detection mechanism 24 is sent to the A/D
The converter 25 converts it into a digital signal and supplies it to the control circuit 20. In this case, the A/D converter 25
The A/D conversion operation is executed in response to a command from the read request circuit 26 which operates in response to a command from the 1011 circuit 20, and the read window glass position information is supplied to the control circuit. It is. Furthermore, a memory 27 is set for the control circuit 20, and peak level information corresponding to the load current value detected by the peak hold circuit 21, for example, is stored in the memory 27 by the position detection. The memory setting is made in accordance with the window glass position detected by @1fII24.

Fig. 2 shows the mechanism of driving the window glass 30, which is driven to open and close by the drive control circuit as described above.
It includes a fan-shaped gear 32 that is rotated by a gear 31 that is rotationally driven by l111. This gear 32 has a rotating shaft 33 set in its principal valve, and is rotationally controlled as shown by an arrow 34 in response to the rotation of the electric arm 11.

A lever (1, +11136) is connected to this gear 32 to raise or lower the window glass 30 as indicated by an arrow 35 as the gear 32 rotates. Window glass 3 corresponding to
0 is driven in the direction of closing (rising) or closing (falling).

Further, the rotation shaft 3 of the gear 32 that drives the window glass 30 is
3 is provided with a position detection mechanism 24 for the window glass 30 using a potentiometer so as to rotate coaxially. That is, from this position detection UIIM24,
A voltage signal corresponding to the moving position of the window glass 30 is output.

Here, as shown in FIG. 3, the window glass 30 has a dangerous area where a foreign object 37 may be caught, and a safety area where there is a very low possibility of a foreign object being caught, depending on the raised position of the window glass 30. , and the 100W4 area is divided and set according to the A point. At this division point A, the distance d between the upper end of the window glass 30 and the lower end of the window frame 38 is
For example, it is set at the position 5■, and the range where the window glass 30 is open from this point A is defined as a dangerous area. There is a foreign object 3 between this point A and the frame 38.
7 is set as a safe area where the possibility of being caught is very low, and this safe area is the area where the stopping range in which the window glass 30 is closed is set.

FIG. 4 shows the state of the load current I of the power supply 111 when the window glass 30 is closed from the fully open state to the fully open state.
This is a state where the current is large. After that, the current is in a constant current state, and at the time when the window glass 30 is fully opened, the current is in a maximum current state for a period of t2.

In FIG. 4, the position of the window glass 30 is in a state corresponding to the output signal from the position detection mechanism 24. For example, the output signal of the position detection mechanism 24 corresponding to point A is Vt+a, and the window glass 30 is in a state corresponding to the output signal from the position detection mechanism 24. It is assumed that the output signal when the full song state is reached is set to Vpo.

The area between this fully open position and point A is considered to be a dangerous area as described above, and this dangerous area is defined by the above-mentioned Vpa and V
By dividing the question po into n equal parts, roughly n divided areas are set.

Then, corresponding to each of the n divided regions, the load 1! of the electric motor 11 in the steady state is determined. The comparison reference current value Ic is set corresponding to @lim l.

If such a window glass closing drive rock is used for a long period of time, the frictional resistance of the glass drive UN will change over time, and this window glass The state of the load current of 1113111 that drives 30 also changes. For this reason, each time the closing operation of the window glass 30 ends normally, the comparison reference current 1i1i1c is changed depending on the detection state of the load current value during the closing operation, and learning control is executed. .

In the above-mentioned opening/closing control device, the window glass 3
0 in the dangerous region of the closing operation process, the voltage vJli
11 load current Ml and the comparison reference voltage stored corresponding to each area divided into ng. lll [I
Compare C and C for each area, and calculate the load?
! When the current value exceeds the reference current 111c by a certain value IO, it is assumed that the foreign object 31 is caught.

When such a state occurs, the closing operation of the window glass 30 is stopped or reversed to the closing operation.

In addition, in the safe area, the above comparison reference current value Ic @ maximum load current is set to 111 wax, and when the window glass 30 is present in this safe area, the load current is 11tli.
When t exceeds the reference voltage 'It 1c, the window glass 30
is considered to be fully closed.

FIG. 5 explains the operation flow of the opening/closing device as described above. First, the position of the window glass 30 is detected by a subroutine 100 for detecting the initial position of the window glass 30.

FIG. 6 shows the flow of this initial position detection subroutine 100, in which output signals vp1. : Based on the comparison steps 1001, 1002, . is substituted into .

In this state in which the position of the window glass 30 is detected in the above subroutine 100, the opening/closing command state by the operation switch 23 is determined in step 101. First, the switch 23 generates a closing request and a closing request. If not, the closing signal and closing signal are set to clear in step 102. If there is a closing request, the process proceeds to step 103, where the closing signal is cleared and the closing signal is output. In this state, 11111t11
A signal is given from the circuit 20 to the transistor 15, which closes the relay switch 13a and rotates the switch 111 in the direction of closing the window glass 23. This state is step 1
M1 is continued until the operating switch 23 is set to the closed or stopped state in step 04, and when a closing or stopping request is issued from the switch 23, the closing signal is cleared in the next step 105. and step 10 above
Return to 0.

If the request to close the operation switch 23 is confirmed in step 101, the interrupt is prohibited in step 101, and the close signal is set to clear in step 108, and the close signal is output. Then, the 1ilJ tl1 circuit 20 supplies a signal to the transistor 14 to close the relay switch 12a and drive the electric motor 1j111 to rotate in the closing direction.

In this case, when starting the electric motor 11, the starting large 'R8
! Since this is the case, this state is held for a period of tl in step 109 to wait for the starting current to return to the steady current state. Then, in step 110, the electric 1j111
Load of? The memories MM to Mnl storing the II current value are cleared, a clear pulse is output to the peak hold circuit 21 in step 111, and the above-mentioned interrupt prohibition is canceled in step 112.

The reason for executing the above interrupt prohibition is to prevent the gate through which the starting current of the electric Nada 11 is flowing from accepting requests to read negative [1] for setting the comparison reference current value. .

After the interrupt prohibition is canceled in step 112 in this way, the closing request is confirmed in step 113 and then the process proceeds to step 114, where the window glass 30 is determined to be in a dangerous area based on the output of the position ffi detection groove 24. Decide whether or not. When the window glass 30 is in a foreign object trapping danger area, in step 115, a reference current value for comparison of the load current corresponding to the position of the window glass 30 at that time is stored.
is read from the memory, and if it is rMs-OJ, the same control as when the window glass 30 is in the safe area is executed.

When it is determined in step 115 that "rMs≠0", in step 11G Ms is set as the load current comparison reference value lc, and in step 117, the difference between the load current I of the motor 11 and the reference current rfiIC at that time is determined. Find the difference ``l
-1cJ is compared with a constant 11flo, and the above difference is a constant V
When the condition exceeds nlo, it is assumed that a foreign object has been caught. Further, when the above difference is smaller than IO, it is determined that there is no abnormality and the process returns to step 113, and the window glass 30
The closing operation will continue.

When a foreign object is detected in step 117, the process proceeds to step 118, where the closing signal is cleared and the electric motor 1111 is stopped, and then the closing signal is output and the electric paddle 1
1 is reversely driven in the direction of closing the window glass 30. and,
This state is maintained for a time t3 set in step 119, and then in step 120 the closing signal is cleared and the electric motor 1jl11 is stopped.

If it is determined in step 114 that the window glass 30 is in the safe area, and in step 115, rMN-O
If it is determined to be J, the comparison reference current 1i11c is set to [WaX in step 121, and this lc is compared with the motor load current 1i11 at that time in step 122. If 1 is smaller than lc in step 122, the process returns to step 113 and this closing operation is continued. If I exceeds IO in step 122, it is determined that the window glass 30 is fully open, and in this state, after holding this state for a time t2 in step 123, In step 124, the closing signal is cleared and the electric motor (111) is stopped.

In this way, the operation leading to step 124 is the end of the window glass 30 closing operation in the normal state, so in step 125, the load current I of the electric pole 11 during this closing operation is used to store and set in the memory. An operation is performed to change the comparison reference current value of the load current.

In step 113, the request made by the operation switch 23 is
If it is a stop or closing request, the process proceeds to step 126 to clear the closing signal, and in step 121 the load r4 current comparison reference current value is changed.

FIG. 7 shows the state of the load current I of the electric break 11 when a closing request is given when the window glass 30 is at point a, for example, and the load current I after startup is the reference current. 1
During the startup time t3 in which the voltage exceeds c, the closing operation is continued by maintaining the state in step 119, and then the closing operation is continued m by comparing the load current I and the reference current lc, and the closing operation is continued at 6 points. The electric motor 1j111 is controlled to stop in response to the stop request.

FIG. 8 shows the current l11 [
This shows a read request interrupt processing routine 200, and this current I read request is made when the window glass 30 is in the 1+1th area from the i-th area set as the above-mentioned section during the closing process of the window glass 30. Occurs when moving to That is, when the plate control circuit 20 accepts the current value reading request interrupt, the maximum value lN1aX of the load ii current value of the electric filter 11 in the i-th region is read from the peak hold circuit 21. Then, set this value to step 2
After the peak hold circuit 21 is cleared in step 202, 1 is added to the window glass position number N in step 203.

FIG. 9 shows a comparison value updating routine 300. First, in step 301, the window glass position number N is set to "rN-1". Then, in steps 302 and 303, the previous load current 11 M N and the current load current 1a
If both tVL' are not O, in step 304 Mlv = 0.9Ms +Q, IMFI' and load current MN are changed. Further, when it is determined that MN is O in step 302, MN is changed to the current load current MN' in step 305, and when MN' is determined to be O in step 303, the above-mentioned MN is changed. The process proceeds to step 306 without any problem.

In step 306, the position number N is incremented by 1, and in step 307 it is determined whether or not the number N exceeds the divided number rIin.
≦n'', the process returns to step 302 and this update operation is continued. Then, in step 301, N
When it is determined that the number exceeds n, this update routine is terminated.

In FIG. 7, the comparison value change area is between point a and point b, and the comparison reference current is updated from the previous state shown by the broken line to the state shown by the solid line in response to this closing operation. It is something that will be done.

In addition, in the load current value updating means of the electric motor 11, the following modification formula can be used to generalize the change formula.

MN = (1-1')Ms +rMN' However, O<r
<1.

[Effect of the Invention J As described above, according to the window opening/closing control device according to the present invention, the state of the load current of the electric blade that drives the window glass can be monitored in detail in accordance with the position of the window glass. In the event that a failure such as a foreign object gets caught during window closing operation, this condition can be reliably detected and the window closing operation can be stopped.
211 is effectively executed. In addition, the comparison reference current value for comparing the motor load current during such operation is set to a further Fr corresponding to the normal closing operation of the window, and therefore the frictional resistance of the drive structure of the window, etc. Even if the window changes over time, it is possible to detect the occurrence of a failure during a stable window closing operation.

[Brief explanation of the drawing]

FIG. 1 is a block diagram explaining a window opening/closing control device according to an embodiment of the present invention, FIG. 2 is a block diagram explaining a window drive' (El 41 part) driven by the control device, and FIG. 4 is a diagram explaining the state of the window portion position, FIG. 4 is a diagram explaining the state of the motor current that drives the window, FIG. 5 is a flowchart explaining the operating state of the control device, and FIG. 6 is the flowchart described above. A diagram showing the initial position detection routine of the window in
The seventh factor is a diagram showing the load current state and the comparison reference current state corresponding to the window closing operation, FIG. 8 is a diagram explaining the interrupt processing routine in the above flow, and FIG. 9 is a diagram explaining the comparison value update routine. This is a diagram. DESCRIPTION OF SYMBOLS 11...Electric motor, 12a, 13a...Relay switch, 17...Load 'R current/output circuit 20...II
J immediate circuit, 21...Peak hold circuit, 23...
Operation switch, 24... Position detection mechanism, 30... Window glass, 31.32... Gear, 33... Rotating shaft. Applicant's agent Patent attorney Suzue Kihiko No. 1r:! J Figure 4 Figure 7 Opening the counter! ! A 6th prisoner 8th ward 9th prisoner

Claims (2)

[Claims] (1) A window opening/closing mechanism that drives and controls the window in the opening and closing directions using an electric motor, a means for setting a dangerous area where a foreign object may be caught when the window is closed, and a means for moving the window through the set dangerous area. means for dividing the window into n areas corresponding to the direction and detecting a window movement position corresponding to each divided area; means for reading and storing each area as a comparison reference current value corresponding to each of the divided areas; and means for learning and storing the load current value of the motor in the closed operation state of the window for each of the learned and memorized divided areas. means for comparing a comparison reference current value corresponding to the position of the window, and a means for comparing the comparison reference current value and the motor load current value to determine that the load current value is greater than the current amount specified from the reference current value. A window opening/closing control device comprising means for stopping the closing operation of the window when the window is in a large state. (2) The learning and storing means includes a peak level holding means for memorizing and holding the motor load current value, and the peak level is held in a state where the closing and moving window passes through the boundary portion of each range set in the n divisions. It is comprised of a means for issuing peak level reading and update storage commands to the means, and a memory for storing and setting the read peak level information corresponding to the window position division range, and this memory has the information of the window. The above-mentioned peak level read information corresponding to past normal closing operations is stored and set for each divided area, and this stored information is corrected and controlled by new information from a peak level holding means. The window opening/closing control device according to item 1.