JP2954469B2 - Opening / closing body opening / closing control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an open / close control method for an opening / closing body such as a power window and a sunroof, and more particularly to a method for controlling the opening / closing of the opening / closing body based on a count value of an output of a pulse generating means for detecting a rotation angle of a motor for driving the opening / closing body. The present invention relates to an opening / closing body opening / closing control method for detecting a body opening / closing position.

[0002]

2. Description of the Related Art For example, as a device for opening and closing an opening and closing body,
2. Description of the Related Art As shown in FIG. 2, there is a device for opening and closing a window glass of an automobile using a driving force of a motor. In this device, when a switch group arranged in the vehicle is operated, a window glass 12 is moved up and down within a range of an arrow H1 by an opening / closing operation signal sent to the motor 3 via a control unit. . For example, when a closing operation switch in the switch group is operated, the motor 3 rotates clockwise (this rotation direction is set to forward rotation), and a pinion (not shown) provided on the output shaft of the motor 3 and a tooth are provided. The X-shaped regulator 13 operates via the combined sector gear 13a, and the window glass 12 closes. When the opening operation switch in the switch group is operated, the motor 3 rotates counterclockwise (this rotation direction is reversed), and the window glass 12 opens.

In such a power window device, a change in the rotation cycle when a foreign object is caught during the closing operation of the window glass 12 based on a pulse signal from a pulse generation means for detecting the rotation angle of the motor 3. There is known an apparatus which detects foreign object entrapment based on the amount of change and performs foreign object entrapment detection control of stopping the motor 3 in the closing direction and performing reverse rotation. By performing the foreign object entrapment detection control in this way, the power window device can be made more secure.

However, if an attempt is made to determine the entrapment of foreign matter based solely on the amount of change in the rotation cycle, there is a disadvantage that the difference from the case where the window glass is completely closed and the motor is stopped cannot be determined. For this reason, it is necessary to set so as not to determine the entrapment of foreign matter in a certain section immediately before fully closed. Furthermore, in order to set the section in which the determination of the foreign substance being caught is not performed,
It is necessary to provide a means for detecting the position of the window glass 12. As a method of detecting the position of the window glass 12, there is known a method of counting a pulse signal from a pulse generating means indicating the rotation of the motor 3, that is, the operation of the window glass 12. That is, the moving distance per pulse is determined in advance, and for example, the origin is set to the fully closed state, the number of pulses is added during the opening operation, and the number of pulses is reduced during the closing operation, so that the position is calculated from the number of pulses. Is to be detected.

In order to detect the position of the window glass 12 by pulse counting, it is necessary to first set the origin so that the pulse count value becomes 0 in accordance with the fully closed position of the window glass 12. is there. Conventionally, the timing of this origin setting is based on the window glass 1
In a state where the motor 2 is fully closed and the motor 3 is stalled, this is performed immediately before the motor drive signal is stopped (t2 in FIG. 1).

[0006]

However, there are elastic bodies such as dampers (not shown) in the power window device.
When the supply of the power supply voltage to the motor 3 is stopped, the torque applied to the elastic body disappears and the elastic body is released, so that the elastic body of the elastic body causes the motor 3 to temporarily reverse. Can be FIG. 1 shows a motor drive signal and a motor rotation pulse at the time of setting the origin, and the pulse indicated by A indicates that the motor is rotated in the reverse direction after the motor drive signal disappears.

Therefore, in the conventional method of setting the origin immediately before stopping the motor drive signal (t2 in FIG. 1),
Even though the window glass 12 is not moving at all, the motor 3 rotates in reverse to count the rotation pulses after setting the origin, and the actual position of the window glass 12 and the apparent position by the pulse counting And an error occurs. Further, due to this error, a situation may occur in which, although the section is actually in the section where the foreign object entrapment determination is not performed immediately before the fully closed state, the section is apparently in the section where the foreign object entrapment determination is performed. In this case, the window frame is determined to be foreign matter during the fully closing operation, and the motor 3 is driven to rotate in the reverse direction, so that the window glass 12 cannot be fully closed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its main object the purpose of the present invention to disclose the actual position of the window glass and the apparent position by pulse counting. It is an object of the present invention to provide a method for controlling the opening and closing of an opening and closing body that can set an origin so that an error does not occur.

[0009]

SUMMARY OF THE INVENTION According to the present invention, there is provided an opening / closing position of an opening / closing body based on a count value of an output of a pulse generating means for detecting a rotation angle of a motor for driving the opening / closing body. A method for controlling the opening and closing of an opening and closing body, which performs detection and controls the detection of foreign object entrapment only when the position of the opening and closing body is within a predetermined range, wherein the opening and closing body is fully closed or fully opened, and It is attained by providing an opening / closing body opening / closing control method, wherein the origin of the opening / closing body position is set after a lapse of a predetermined period from the stop of power supply to the motor.

[0010]

As described above, when detecting the open / close position of the opening / closing body based on the count value of the output of the pulse generating means for detecting the rotation angle of the motor for opening / closing the opening / closing body, the opening / closing body is fully closed or fully opened. By setting the origin of the opening / closing body after a predetermined period has elapsed after the power supply to the motor is stopped, it is possible to read a signal generated by the motor rotating in reverse by the elastic force of the elastic body or the like in the opening / closing body. Since this can be prevented, it is possible to prevent an error from occurring between the actual position of the opening / closing body and the apparent position based on the pulse count.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a preferred embodiment of the present invention.

FIG. 3 is a schematic circuit diagram showing a control unit of the power window device to which the present invention is applied. As described above, the control unit operates according to a signal transmitted to the control unit by operating a switch group. The power is supplied from the unit to the motor 3 to cause the vehicle window glass 12 shown in FIG. 2 to open and close.

As shown in FIG. 3, each input terminal I of the main control circuit 1 comprising a CPU as an opening / closing operation control means.
Opening / closing operation signals from the window glass closing operation switch 2a and the window glass opening operation switch 2b of the switch group 2 are input to I and I2, respectively.

A positive terminal of the motor 3 is connected to a relay Ry1 for closing the window glass, and a negative terminal is connected to a relay Ry2 for opening the window glass.
These relays Ry1 and Ry2 are connected to the transistors Tr1 and O2 connected to the output terminals O1 and O2 of the main control circuit 1, respectively.
1. On / off control is performed via Tr2.

Two Hall ICs for detecting the position of the rotor are provided on the inner wall of the stator (not shown) in the motor 3.
4 and 5 are sequentially arranged with a phase difference of 90 degrees in the normal rotation direction (clockwise) of the rotor. The output line from the first Hall IC 4 is connected to the motor rotation pulse conversion circuit 6 and the input terminal I4 of the main control circuit 1. The output line from the second Hall IC 5 is connected to the motor rotation pulse conversion circuit 6 and the input terminal I5 of the main control circuit 1.

In the motor rotation pulse conversion circuit 6, exclusive OR circuits EXOR1, EXOR2, EXOR3 and the like are connected. Outputs from both Hall ICs 4 and 5 are connected to each input terminal of the exclusive OR circuit EXOR1. Output terminal of exclusive OR circuit EXOR1 and GN
A resistor R1 and a capacitor C1 are connected to the node D via a node A, and a node B between the resistor R1 and the capacitor C1 is connected to one input terminal of an exclusive OR circuit EXOR2. . Exclusive OR circuit EXOR2
Is connected to the ground, and the output terminal of the exclusive OR circuit EXOR2 is connected to one input terminal of the exclusive OR circuit EXOR3 via the node C.
The other input terminal of the exclusive OR circuit EXOR3 is connected to the node A. Node B is connected to capacitor C
2 is connected to the node C. The output terminal of the exclusive OR circuit EXOR3 is connected to the input terminal I of the main control circuit 1.
3 is connected.

Next, the operation of the control unit of the power window device having the above configuration will be described. Each switch 2a,
By operating 2b, a power supply voltage is supplied to the motor 3, and the window glass 12 opens and closes. For example, when the window glass 12 is to be closed, the switch 2
Close a. Then, a closing operation signal is supplied to the input terminal I1 of the main control circuit 1, and in response to this signal, an ON signal is sent from the output terminal O1 of the main control circuit 1 to the relay Ry1. As a result, a current line is formed from the power supply through the + terminal and the-terminal of the motor 3 to GND, and the motor 3 rotates clockwise (this rotation direction is set to forward rotation), and the window glass 12 is moved. Close operation.

When it is desired to open the window glass 12, the switch 2b is closed. Then, an ON signal is output from the output terminal O2 of the main control circuit 1 to the relay Ry2, and the power supply passes through the negative terminal and the positive terminal of the motor 3 to GND.
Is formed, the motor 3 rotates counterclockwise (this rotation direction is reversed), and the window glass 12 is opened.

From the two Hall ICs 4 and 5, a signal indicating the rotational position of the rotor is output. This output signal is shown in FIGS. 4A and 4B. The first Hall IC 4 outputs a signal that periodically switches between high and low as shown in FIG. Also, the first hall I
The second Hall IC 5 arranged clockwise from the C4 with a phase angle of 90 degrees is periodically delayed by 90 degrees from the output signal from the first Hall IC 4 as shown in FIG. A signal that switches between high and low is output.

The signals of the two systems from the two Hall ICs 4 and 5 are always supplied to the respective input terminals of the exclusive OR circuit EXOR1 in the motor rotation pulse conversion circuit 6. These signals are converted by the motor rotation pulse conversion circuit 6 into motor rotation pulses as shown in FIG. 4C and output from the output terminal of the exclusive OR circuit EXOR3. This motor rotation pulse is input from the input terminal I3 to the main control circuit 1, and is used for detecting the position of the window glass 12 and the motor rotation cycle.

The signals of the two systems from the two Hall ICs 4 and 5 do not pass through the motor rotation pulse conversion circuit 6 as described above, but are directly input to the main control circuit 1 from the input terminals I4 and I5. Is done. The signals of the two systems from the Hall ICs 4 and 5 have a phase difference of 90 degrees from each other, so that the rotation direction of the motor 3 and the window glass 12
Identify the opening and closing directions.

The position of the window glass and the rotation period of the motor are detected in the main control circuit 1 based on the motor rotation pulse input to the main control circuit 1 from the input terminal I3. Furthermore, the determination of the foreign object being caught is performed based on these. In addition, the determination of entrapment of foreign matter is performed by:
Only during the closing operation, and as shown in FIG. 2, the window glass 12 has a gap between its upper end and the window frame 14 of 4 mm.
Only when it is between mm and 200 mm (within the range of arrow H2).

The detection of the window glass position is performed by counting motor rotation pulses. In other words, the moving distance per pulse is determined in advance, the origin is set to the fully closed state, the number of pulses is added during the opening operation, and the number of pulses is reduced during the closing operation. Perform detection. In detecting the window glass position by the pulse counting in this way, first, the fully closed state of the window glass 12 is set to be the origin. Hereinafter, this origin setting method will be described with reference to FIG.

First, by operating the closing operation switch 2a to fully close the window glass 12, a motor drive signal as shown in FIG. 1A is sent to rotate the motor 3 in the forward direction. . At this time, a motor rotation pulse indicating that the motor 3 is rotating as shown in FIG. 1B is generated.

Next, when the motor rotation pulse is interrupted for a predetermined time T1 (for example, T1 = 100 msec),
It is determined that the window glass 12 is fully closed and the motor 3 is stalled (t1 in FIG. 1). Thereafter, a predetermined time T2 (for example, T2 = 200 msec) from the motor stall determination time t1 so that the window glass 12 is completely closed without fail.
During this period, a motor driving signal is further transmitted to cause the motor 3 to output a driving force in the normal rotation direction. When the motor drive signal disappears, the motor 3 temporarily reverses due to the resilience of a damper (not shown) in the power window device. The pulse indicated by A in FIG. 1 indicates that the motor 3 is rotating in the reverse direction.

Further, a predetermined time T3 (for example, T3 = 800 msec) sufficient for the reverse rotation phenomenon of the motor 3 to be settled from the time when the motor drive signal disappears, and the pulse count value is calculated at the timing t3 shown in FIG. Set the origin to 0. This ensures that the fully closed state of the window glass 12 becomes the origin.

On the other hand, based on the motor rotation pulse input to the main control circuit 1 from the input terminal I3, the rotation period T _{n in the} main control circuit 1 as shown in FIG.
Is detected. The rotation period is determined by a moving average every four periods, taking into account the influence of the fluctuation of the rotation period due to a measurement error or the like.

As described above, the window glass position and the motor rotation cycle are detected from the motor rotation pulse signal,
When the window glass 12 has a gap between its upper end and the window frame 14 between 4 mm and 200 mm (within the range indicated by the dimension H2) and is in the closing operation, foreign matter is detected based on a change in the motor rotation cycle. Is determined. As the determination method of the foreign substance entrapment, the period T _n of the n-th signal is compared with the period T _{n + 1} of the subsequent (n + 1) th signal, the change rate T _{n + 1} / T _n is given There is a method of judging that a foreign object has been caught when the judgment value K is exceeded.

As described above, during the closing operation, that is, when the output terminal O
When the main control circuit 1 determines that a foreign object has been caught when the ON signal is output from the relay Ry1 and the relay Ry1 is in the ON state, an ON signal is also output from the output terminal O2, and the relay Ry2 is turned on. The dynamic brake operates. Subsequently, an off signal is output from the output terminal O1,
The closing operation of the window glass 12 is stopped. After the stop, the ON signal is continuously output from the output terminal O2 for a predetermined time, and the window glass 12 performs the opening operation for a predetermined period.

In this embodiment, the method for controlling the opening and closing of the device for opening and closing the side window glass 12 of the vehicle has been described. However, the present invention is not limited to this. Can be applied.

[0031]

As is apparent from the above description, according to the present invention, the open / close position of the opening / closing body is detected based on the count value of the output of the pulse generating means for detecting the rotation angle of the motor for driving the opening / closing body. When the opening and closing body is fully closed or fully opened, and after a predetermined period of time has elapsed since the power supply to the motor has been stopped, by setting the origin of the opening and closing body position,
It is possible to prevent the motor from rotating and reading the signal generated by the reversal due to the elastic force of the elastic body or the like in the opening / closing body. Therefore, by reading the signal generated by the motor rotating in reverse,
An error occurs between the actual position of the opening / closing body and the apparent position based on the pulse count. For this reason, during the fully closing operation, the outer frame of the opening / closing body is determined to be foreign, and the motor is driven to rotate in the reverse direction. Can be prevented from being unable to be fully closed. As described above, according to the opening / closing body opening / closing control method of the present invention, the opening / closing body opening / closing device can be made more reliable without malfunction.

[Brief description of the drawings]

FIG. 1 is a waveform diagram showing a motor drive signal and a motor rotation pulse when an origin is set.

FIG. 2 is a side view showing a schematic configuration of a power window device.

FIG. 3 is a schematic circuit diagram of a control unit of the power window device to which the present invention is applied.

FIG. 4 is a waveform diagram showing a signal output from a Hall IC and a corresponding motor rotation pulse.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main control circuit 2 Switch group 2a Close operation switch 2b Open operation switch 3 Motor 4 1st hall IC 5 2nd hall IC 6 Motor rotation pulse conversion circuit 11 Door 12 Window glass 13 X-shaped regulator 13a Sector gear 14 Window frame

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masashi Shimada 1-2681, Hirosawa-cho, Kiryu-shi, Gunma Mitsuha Electric Co., Ltd. (58) Field surveyed (Int. Cl. ⁶ , DB name) E05F 15/00-15/20

Claims (1)

(57) [Claims] An opening / closing position of the opening / closing body is detected based on a count value of an output of a pulse generating means for detecting a rotation angle of a motor for opening / closing the opening / closing body, and a position of the opening / closing body is within a predetermined range. An opening / closing control method for an opening / closing body configured to perform foreign object entrapment detection control only at a certain time, wherein the opening / closing body is fully closed or fully opened, and after a predetermined period elapses after stopping power supply to the motor. An opening / closing control method for an opening / closing body, comprising setting an origin of the opening / closing body position.