JP2830543B2 - Switchgear for vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle opening and closing device, and more particularly to a vehicle opening and closing device suitable for opening and closing a power window in an automobile or the like.

[0002]

2. Description of the Related Art Conventionally, window glasses of automobiles and the like are designed to open and close window glasses of respective doors by operating a control switch attached to each door. A master switch 1 shown in FIG. 8 is provided on the driver's door,
By operating the master switch 1, window glasses of all doors can be opened and closed. The master switch 1 is provided with a one-touch mechanism (AUTO position 1A shown in the figure) that allows the window glass to be fully opened and fully closed once the switch is depressed once without continuing to depress.

[0003] The power window device described above is composed of a circuit shown in FIG. In this figure, when the ignition switch ISW is turned on, the power window relay 2 operates and the power window switch 3a
3c and the control unit 4 are supplied with current. In this state, when the master switch 1 is operated in a predetermined direction, a signal corresponding to the operation is supplied to the control unit 4. Thus, the control unit 4 applies a forward or reverse voltage to both terminals of the power window motor 5 to rotate the motor 5 forward or backward.

A motor 5 on the driver side is provided with a rotation detecting sensor 6. The rotation detection sensor 6 detects the rotation of the motor 5 and turns on / off the signal of the control unit 4. Therefore, when the window glass is fully opened or completely closed, the rotation detection sensor 6 detects the rotation of the motor 5 and turns off the signal of the control unit 4 to stop the drive current to the motor 5, thereby overloading the motor 5. Is prevented.

Next, the operation of the power window device will be described in detail with reference to a timing chart shown in FIG. 10 and a circuit diagram shown in FIG. As shown in FIG.
The conventional power window device includes a differentiating circuit 7, a charging / discharging circuit 8, an operational amplifier 9, a transistor 10, a power window relay 11, and the like. When the window glass is opened and closed, the rotation pulse P1 from the control unit 4 is supplied to the differentiating circuit 7, and the differentiated circuit 7 outputs a pulse signal P2 whose waveform is shaped. This pulse signal P2 is supplied to the charge / discharge circuit 8.

The capacitor C in the charge / discharge circuit 8 is shown in FIG.
The charge / discharge indicated by 0 is repeated. The charge / discharge voltage is compared by an operational amplifier 9 having a predetermined threshold voltage VTH. When the charge voltage is equal to or lower than the threshold voltage VTH, the base voltage of the transistor 10 is set to a low level, and the power window relay 11 is turned off. Turn off. On the other hand, when the window glass is fully closed, since the rotation pulse P1 keeps the high level, the charging voltage of the capacitor C exceeds the threshold voltage VTH, and the power window relay 11 is turned on.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a vehicle opening / closing device according to the present invention drives an opening / closing member by a motor and activates the motor by at least a switch of a one-touch mechanism. in use switchgear, a rotation detector for detecting rotation of the motor, measuring means for measuring the pulse width of the rotational pulse rotation detecting means outputs, Pa rotary pulse measuring means has measured
Difference calculation to calculate the difference between the pulse width and the pulse width in normal operation
Between the output means and the pulse width calculated by the difference calculation means
Is the abnormal pulse width obtained when a foreign object is caught
Between the normal pulse width and the abnormal pulse width
Exceeding the small difference and the difference obtained when a foreign object is caught
Normal pulse width and abnormal pulse, which are preset from normal pulse width
First discrimination to determine whether or not the difference is less than the maximum difference with the loose width
Means and a difference calculating means based on an output of the first determining means.
The difference of the pulse width obtained by
When the difference is less than the maximum difference, a second determining means for determining whether the operation has continued for a predetermined time or more, and, based on an output of the second determining means, opening and closing when the operation has continued for a predetermined time or more. Control means for controlling driving of the motor so as to operate the member in a safe state.

Further, in order to solve the above-mentioned problems, there is a device using a conductive rubber or a pressure switch as a sensor for detecting the full closing of the window. However, there is a problem that a space for mounting the sensor is required. However, there is a problem that the cost is increased, so that it has not been put to practical use.

The present invention has been made in view of the above circumstances, and does not require a special sensor for determining whether an opening / closing member (for example, a window glass) is operating normally or abnormally. It is an object of the present invention to provide a vehicle opening / closing device that is inexpensive and can operate safely.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a vehicle opening / closing device according to the present invention drives an opening / closing member by a motor and activates the motor by at least a switch of a one-touch mechanism. In the opening and closing device, a rotation detecting means for detecting the rotation of the motor, a change measuring means for measuring a change with time of the pulse width of the rotation pulse output by the rotation detecting means, based on the change in the pulse width Discriminating means for discriminating whether the opening / closing member is in a normal operation or an abnormal operation in which a foreign object is caught, and a motor for operating the opening / closing member to a safe state when the operation is abnormal based on an output of the discriminating means. And control means for controlling the driving of.

[0020]

The pulse width of the rotation pulse output by the rotation detecting means incorporated in the motor for driving the opening / closing member (for example, window glass) is measured, and the difference is calculated by the difference calculating means.
The pulse width of the rotation pulse measured by the stage and the pulse in the normal state
Calculating a difference from the width, the first determining means and the second determining means;
The difference between the pulse widths exceeds the minimum difference and the maximum difference
It is determined that the operation is abnormal by determining that the state is lower than the predetermined value and has continued for a predetermined time or more . If the operation is abnormal, the opening / closing member is operated to a safe state. For example, when operating in the closing direction, if a human hand or the like is mistakenly pinched, it is reversed and opened.

[0021]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of one embodiment of the present invention. In this figure, the transistor 20 shapes the waveform of the rotation pulse P1 supplied to the base B, and then supplies it to a CPU (central processing unit) 21. The switches SW1, SW2, SW3 and SW4 are
This is a control switch provided on the driver side.

The switch SW1 is a switch for instructing the raising of the window glass (corresponding to the opening / closing member) only while the switch is pressed, and the switch SW2 is pressed once, and does not continue to be pressed until the window glass is fully closed. Is a switch for instructing the rise of the vehicle. Also, the switch SW3
Is a switch for instructing the lowering of the window glass only while being pressed, and when the switch SW4 is pressed once,
This switch instructs the lowering of the window glass until it is fully opened even if it is not kept pressed. The on / off state of these switches SW1 to SW4 is detected by the CPU 21.

The CPU 21 supplies a control signal C1 for opening the window glass to the base of one of the transistors 22 when opening the window glass according to the state of the switches SW1 to SW4. A control signal C2 for closing the base of the other transistor 23 is supplied. In addition, as described above, according to the change in the pulse width of the rotation pulse P1, it is determined whether the opening / closing operation of the window glass is normal or a foreign object or the like is sandwiched by a process described later, and the foreign object is sandwiched. In such cases, take prescribed measures. CPU 21
Has functions as a change measuring unit, a determining unit, and a controlling unit.

The collector of each of the transistors 22 and 23 is a relay 2 for controlling opening and closing of the window glass.
4, 25 and the control signals C1 and C
According to 2, the voltage applied to the motor 26 for opening and closing the window glass shown in FIG. 2 is controlled. The motor 26 opens and closes the window glass according to the direction of the applied voltage. The motor 26 has a built-in rotation detection sensor (not shown) and supplies the CPU 21 with the rotation pulse P1 corresponding to the rotation of the motor. Note that R1 to R4 are resistors. BT is a battery.

A rotation detection sensor (corresponding to rotation detection means: a rotation detection sensor 6 similar to that shown in FIG. 6)
The rotation pulse P1 is output in accordance with the rotation of the motor 6. In the fully closed operation, when no foreign matter is caught, as shown in FIG. Output P1. This rotation pulse P1
The pulse width becomes large just before the window glass is completely closed, and is maintained at a high level when completely closed.

On the other hand, when a foreign object such as a hand is caught in the fully closing operation, as shown in FIG. 4, even when the window glass is completely closed in the normal operation, the rotation having a small pulse width is still required. The pulse P1 is output, and the change in the pulse width is clearly different. FIG. 5 shows the difference between the rotation pulses P1. In the present invention, it is determined whether or not a foreign object has been caught by measuring the difference in the change in the pulse width of the rotation pulse.

Next, the processing for judging the abnormal operation of the window glass according to the present embodiment will be described with reference to the flowchart shown in FIG. Switches SW1, SW2
When one of SW3 and SW4 is operated, the CPU
Reference numeral 21 drives the window glass to open and close according to the operated switch. In particular, when the switch SW2 is operated, the flowchart shown in FIG. First, in step SA1, the pulse width of the rotation pulse P1 output by the rotation detection sensor is measured.
Next, in step SA2, a difference ΔT between the previously stored pulse width and the pulse width measured in step SA1 is calculated, and the process proceeds to step SA3.

At step SA3, it is determined whether or not the difference ΔT is smaller than a predetermined time t1. The time t1 is the minimum difference between the normal pulse width and the abnormal pulse width set from the abnormal pulse width obtained when the foreign matter is caught in the window glass in FIG. In other words, it is the error range of the normal pulse width. Therefore, step SA
3 is “YES”, that is, the difference Δ
If T is smaller than the time t1, the process proceeds to step SA4, where it is determined that normal operation is being performed. At this time, a normal operation flag is set.

On the other hand, if the decision result in the step SA3 is "NO", that is, if the difference ΔT is equal to or longer than a predetermined time t1, the process proceeds to a step SA5. Step SA5
Then, it is determined whether or not the difference ΔT is equal to or longer than the time t1 and smaller than the time t2. The time t2 is the maximum difference between the normal pulse width and the abnormal pulse width set from the abnormal pulse width obtained when the foreign matter is caught in the window glass in FIG. Therefore, if the result of the determination in step SA5 is "NO", it is determined that the engine is stopped normally,
In step SA8, a normal stop flag is set (if not normal stop, the flag is lowered), and the processing of FIG. 7 described later is executed based on this flag.

On the other hand, if the decision result in the step SA5 is "YES", the process proceeds to a step SA6. In step SA6, it is determined whether or not the number of times of measurement of the difference ΔT is larger than N times. If the result of the determination in step SA6 is "NO", the process returns to step SA1, and again
Steps SA1 to SA5 described above are repeated. Then, if the decision result in the step SA6 is "YES", that is, if the difference ΔT is equal to or longer than the time t1 and smaller than the time t2 and the number of times continues abnormally N times, the process proceeds to the step S6.
The process proceeds to A7, and it is determined that the operation is abnormal (a foreign object has been caught). At this time, an abnormal operation flag is set.

Next, the opening and closing operation of the window glass based on the result of the above-described abnormal operation determination will be described with reference to the flowchart shown in FIG. First, step SB1
In, it is determined whether or not the current operation is under normal operation. Then, the determination result in step SB1 is “Y
ES ”, that is, in the case of normal operation, step S
Execute B1 repeatedly. This is performed until the result of the determination in step SB1 becomes "NO".

When the result of the determination in step SB1 is "YES", the flow proceeds to step SB2 to determine whether or not the current operation is in an abnormal operation. If the result of the determination in step SB2 is "NO", the flow proceeds to step SB3. In step SB3, it is determined whether or not a normal stop has occurred (whether or not ΔT has continued for a predetermined time or more). If the result of the determination in step SB3 is "NO", the process returns to step SB1 and repeats steps SB1 and SB2.

On the other hand, if the decision result in the step SB2 is "YES", that is, if the operation is abnormal, the process proceeds to a step SB4. In step SB4, it is determined that a foreign object has been caught, and the voltage applied to the motor 26 shown in FIG. As a result, the window glass operates in the opening direction, and the fully closing operation with the foreign matter sandwiched therebetween is prevented. When the result of the determination in step SB3 is "YES", that is, when the operation is normally stopped, or when the process in step SB4 is completed,
Proceeding to step SB5, the motor 26 is stopped, and the process ends.

In the above-described embodiment, only the fully closing operation of the window glass has been described. However, the present invention is not limited to this, and may be applied to, for example, the fully closing operation of a sunroof. Moreover, you may apply to a power seat system.

[0035]

As described above, according to the present invention, the pulse width of the rotation pulse output by the rotation detecting means built in the motor for driving the opening / closing member is measured, and the difference is calculated.
Means, the pulse width of the rotation pulse measured by the measuring means
And the difference between the pulse width in the normal state and the pulse width in the normal state,
The difference between the pulse widths is determined to be the minimum
Exceeded and less than the maximum difference
By judging that the operation has been continued as described above, if the operation is abnormal, the opening / closing member is operated to a safe state, so that the following effects can be obtained.

1) When the opening / closing member (for example, window glass) is fully closed, it is possible to more accurately determine whether the operation is normal or abnormal, without the need for a special sensor for detecting entrapment of foreign matter. 3) There is an advantage that no space is required for mounting, the cost is low, and 3) in the case of an abnormal operation, the opening / closing member can be quickly opened and safely operated.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a configuration of one embodiment of the present invention.

FIG. 2 is a circuit diagram showing a motor drive circuit for driving the window glass of the embodiment.

FIG. 3 is a waveform diagram showing a rotation pulse in a normal operation output by a rotation detection sensor built in the motor.

FIG. 4 is a waveform diagram showing a rotation pulse in an abnormal operation output by a rotation detection sensor built in the motor.

FIG. 5 is a diagram showing how the pulse width of a rotation pulse changes in a normal operation and an abnormal operation.

FIG. 6 is a flowchart illustrating an abnormal operation determination process when the window glass is fully closed according to the embodiment.

FIG. 7 is a flowchart illustrating a window glass fully closing process based on the result of the abnormal operation determination of the embodiment.

FIG. 8 is an external view showing a master switch provided on the driver side.

FIG. 9 is a circuit diagram showing a configuration of a conventional power window device.

FIG. 10 is a waveform chart for explaining the operation of each unit in the conventional power window device.

FIG. 11 is a circuit diagram showing a detailed configuration of a conventional power window device.

[Explanation of symbols]

 6 rotation detection sensor (rotation detection means) 20 transistor 21 CPU (change measurement means, determination means, control means) 26 motor

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H02P 5/00

Claims (1)

(57) [Claims] 1. An opening / closing device for a vehicle in which an opening / closing member is driven by a motor and the motor can be started by at least a switch of a one-touch mechanism, wherein rotation detecting means for detecting rotation of the motor, and rotation detecting means output. Measuring means for measuring the pulse width of the rotation pulse, and the pulse width of the rotation pulse measured by the measurement means ,
A difference calculating means for calculating a difference from the pulse width, and a difference between the pulse widths calculated by the difference calculating means ,
Is set in advance from the abnormal pulse width obtained when
Exceeds the minimum difference between normal pulse width and abnormal pulse width
Abnormal pulse obtained when a foreign object is caught
Normal pulse width and abnormal pulse width
A first determining means for determining whether or not the difference is smaller than a maximum difference between the two, and a difference calculating means based on an output of the first determining means.
The difference between the obtained pulse widths exceeds the minimum difference and
A second determining means for determining whether or not the operation has continued for a predetermined time or more; if the operation has continued for a predetermined time or more based on an output of the second determining means, the opening / closing member is safely And a control means for controlling the driving of the motor so that the motor is operated to a normal state.