JP3244253B2 - Power window current detection circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

This onset bright BACKGROUND OF THE INVENTION, regarding the opening and closing operation of the window to the detection and controllable power window current detection circuit when in such head or hand sandwiched during the window closing the window is locked.

[0002]

2. Description of the Related Art As a conventional power window current detection circuit of this type, for example, there is one shown in FIG. That is, the power window current detection circuit 9 was composed of the power window motor 1, the power supply unit 2, the current detection unit 3, the timer unit 4, the solenoid driving unit 5, the solenoid 6, the window open / close switch 7, and the like.

The current detecting means 3 detects a current flowing through the power window motor 1 when the window is opened and closed, and includes a shunt resistor 8 connected in parallel with the power window motor 1.
Had. The shunt resistor 8 of the current detecting means 3 is
Lock current flowing through the motor 1
Current or the motor operating current such as the fully closed current.
The motor operating current is converted to voltage and detected, and this detected
A voltage corresponding to the motor operating current is applied by the voltage dividing resistors 8a and 8b.
To the reference voltage corresponding to the detection level
And that the motor operating current has reached the detection level
Could be detected .

[0004] Such a power window current detection circuit 9
In the above, when the face and hands were pinched during opening and closing of the window and the window was locked, the current flowing through the power window motor 1 for opening and closing the window was detected by the shunt resistor 8 provided in the current detecting means 3.

At this time, when the duration of the motor operating current such as the lock current, the fully open current, or the fully closed current measured by the timer means 4 continues for a predetermined time, the power window motor 1 is automatically closed. Control for performing a predetermined operation has been performed.

[0006]

However, in such a conventional power window current detecting circuit 9, FIG.
As shown, the motor power flowing through the power window motor 1 is
The flow is shown in FIG.
Lock current, full-open current, or full current as shown in (a)
Indicates the detected value of the motor operating current such as the closing current.
After about years have passed, as shown in FIG.
Current, motor current when fully open, current when fully closed, etc.
Since the detection value decreases, the power window motor 1
The detection level set at the beginning of use of
Motors such as lock current, fully open current, or fully closed current
The problem that it is difficult to detect the operating current detection value
there were.

[0007]

For the same reason, it is possible to accurately determine whether the power window is fully open (ie, the power window is completely released) or fully closed (ie, the power window is completely closed) after the age of months. However, there is a problem that the battery may be consumed due to unnecessary operation of the power window motor.

[0009] The present invention has been made in view of such conventional problems, the lock current during certain extent years elapsed,
Even if the motor operating current detection value such as the fully opened current or fully closed current decreases, the motor operating current detection value such as the lock current of the power window motor, the fully opened current, or the fully closed current can be detected. In addition to the above, it is possible to execute a predetermined operation of the power window motor and to execute a predetermined operation of the window in the lock position to promote danger avoidance.
Accurately detect whether the window is fully open or fully closed
To prevent unnecessary battery drain.
It is an object of the present invention to provide a power window current detection circuit that can be stopped .

[0010]

[0011]

The gist of the present invention for achieving the above object is to detect a motor operating current.
In both cases, the detected value of the detected motor operating current is multi-step
Detects that each of the set predetermined detection levels has been reached
Current detecting means (12) to perform
Measures the duration of the detection status for the detection level.
Measured and the measured time is shorter for higher detection levels.
To be longer for lower detection levels.
Detects that a specified multi-step duration has been reached
Timer means (18),
When the detection value that reaches the level continues to correspond to the detection level
The timer means detects that the timer
When the predetermined operation of the power window motor (21)
The present invention resides in a power window current detection circuit (10) characterized by executing a prompting control .

The control for prompting a predetermined operation includes a control for inverting the power window motor (21) to reduce the window when a lock current of a predetermined detection level is detected,
Control to stop the power window motor (21) when a fully detected current at a predetermined detection level is detected, or to stop the power window motor (21) when completely closed current at a predetermined detection level is detected. Means control.

[0013]

[0014]

[0015]

[0016]

[0017]

[0018]

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a functional block diagram of a power window current detection circuit (10) according to an embodiment of the present invention. FIG. 2 is a graph illustrating a change over time of a motor operation current detection value such as a lock current, a fully-opened current, or a fully-closed current of the power window motor (21) according to the embodiment of the present invention.

First, the configuration of the power window current detection circuit (10) according to the embodiment of the present invention will be described. Power window current detection circuit (10) according to an embodiment of the present invention
Is capable of executing control to detect and control the opening and closing operation of the window when the window is locked when the head or hand is pinched during opening and closing of the power window used in a vehicle such as an automobile, and The power window motor (21) is operated in a predetermined operation by accurately detecting the fully opened state of the power window (that is, the state in which the power window is completely released) or the fully closed state (that is, the state in which the power window is completely closed). As shown in FIG. 1, the control device is capable of executing a control for causing a current to be detected, and includes a current detecting means (12), a solenoid driving means (19), a shunt resistor (16), and a timer means (18).

As shown in FIG. 1, power window motor (21), which is power means for opening and closing the power window, and solenoid driving means (19) are peripheral components of the power window current detection circuit (10). ), A window opening / closing switch (not shown) which is a control switch for turning the power window motor (21) to an OFF state or an ON state by a solenoid driving means (19), and the like. Have been.

Next, the configuration of the timer means (18) according to the embodiment of the present invention will be described. The timer means (18)
As shown in FIG. 1, the current can be measured in a state where the detection value of the motor operation current has reached a predetermined detection level, and the predetermined detection time of the motor operation current can be set in multiple stages. It is connected to the detecting means (12) and the solenoid driving means (19).

As shown in FIG. 2, for example, the timer means (18) controls the state in which the detected value of the motor operating current reaches a second reference voltage (specifically, detection level 1) which is a predetermined detection level. The current detecting means (12) and the solenoid driving means (1) can measure the duration time and set a predetermined detection time of the motor operating current to T1.
9).

Similarly, the timer means (18) can measure the duration of the state in which the detected value of the motor operating current has reached the first reference voltage (specifically, the detection level 2) which is the predetermined detection level. In addition, it is connected to the current detecting means (12) and the solenoid driving means (19) so that the predetermined detection time of the motor operating current can be set to T2.

The timer means (18) is, specifically, M
A microprocessor mainly composed of a PU and a timer means such as a timer IC can be achieved as main parts. Next, the configuration of the solenoid driving means (19) according to the embodiment of the invention will be described.

As shown in FIG. 1, the solenoid drive means operates the solenoid (20) to open and close the window when the state in which the detected value of the motor operating current has reached a predetermined detection level has continued for a predetermined detection time. The power window motor (2
It is connected to a solenoid (20) and a timer means (18) so that control for prompting a predetermined operation of 1) can be executed. Note that the control for prompting the predetermined operation includes controlling the power window motor (21) to reverse the window when a lock current of a predetermined detection level is detected, and detecting the fully opened current of the predetermined detection level. Means that the power window motor (21) is stopped when the current is detected, or the power window motor (21) is stopped when a fully-closed current of a predetermined detection level is detected.

[0027] The solenoid drive means (19) can be achieved mainly by a microprocessor constituted mainly of an MPU and a solenoid drive means such as a switching transistor as main parts. Next, the configuration of the current detecting means (12) according to the embodiment of the present invention will be described.

As shown in FIG. 1, the current detection means (12) can set a predetermined detection time in multiple stages (specifically, T1 and T2 in FIG. 2) and set a predetermined detection level. It can be set in multiple stages (specifically, detection level 1 and detection level 2 in FIG. 2), and when the window of the vehicle (specifically, automobile) is locked, the power window motor (21) A lock current, a fully-opened current, or a fully-closed current is detected as a motor operating current, and when the detected value of the motor operating current reaches a predetermined detection level for a predetermined detection time, the power window motor The first-stage detection unit (13), the second-stage detection unit (14), the first resistance (15A), the second resistance (15B), and the first stage detection unit (13), so that the control for prompting the predetermined operation of (21) can be executed. Three resistors (1
5C).

The current detecting means (12) is provided with a first-stage detecting section (1) so that a predetermined detection level can be set in multiple stages.
3), a second-stage detector (14), a first resistor (15A), a second resistor (15B), and a third resistor (15C). The shunt resistor (16) provided in the current detecting means (12) is connected in parallel with the power window motor (21) so that the motor operating current can be detected.

Specifically, the current detecting means (12)
A microprocessor mainly composed of a PU, a first-stage detection unit (13), a second-stage detection unit (14), a first resistor (15A), a second resistor (15B), and a third resistor (15)
C) can be achieved as a main part.

Next, the configuration of the current detecting means (12) according to the embodiment of the present invention will be specifically described. Current detection means (1
2), as shown in FIG. 1, two stages of a first reference voltage (specifically, detection level 2 in FIG. 2) and a second reference voltage (specifically, detection level 1 in FIG. 2). In order to set a predetermined detection level with the first resistor (15)
A), second resistor (15B), and third resistor (15C)
Connected.

A first reference voltage (specifically, detection level 2) and a second reference voltage (specifically, detection level 1), which are two predetermined detection levels, are connected in series with the reference voltage. The first resistor (15A) and the second resistor (15
B) and the third resistor (15C).

That is, the first reference voltage (specifically, the detection level 2) is given by: first reference voltage = {reference voltage × first resistance (15A)} / {first resistance (15A) + second resistance ( Fifteen
B) + third resistance (15C) can be obtained by a proportional formula. Similarly, the second reference voltage (specifically,
The detection level 1) is: second reference voltage = {reference voltage × {first resistance (15A) + second resistance (15B)} / {first resistance (15A) + second resistance (15B) + third resistance] (15
C) It can be obtained by the proportional formula of｝.

The first-stage detection unit (13) specifically includes M
A microprocessor composed mainly of a PU and a voltage comparison means such as a comparator IC can be achieved as main parts. The first stage detection unit (13) provided in the current detection means (12) has, as shown in FIG.
The motor operating current is detected via the shunt resistor (16), and the detected value of the motor operating current at this time is compared with a first reference voltage (specifically, detection level 2) to determine the motor operation current. When the detected value of the current reaches the first reference voltage (specifically, the detection level 2) which is the detection level in the first stage, control for prompting a predetermined operation of the power window motor (21) can be executed. Thus, it is connected to the timer means (18). Note that the control for prompting the predetermined operation is a power window motor (2) when a lock current of a predetermined detection level (that is, detection level 2) is detected.
Control to lower the window by reversing 1), control to stop the power window motor (21) when a full-open current of a predetermined detection level (that is, detection level 2) is detected,
Alternatively, when a fully-closed current of a predetermined detection level (that is, detection level 2) is detected, the power window motor (21)
Means stop.

The first-stage detection unit (13) specifically includes M
A microprocessor composed mainly of a PU and a voltage comparison means such as a comparator IC can be achieved as main parts. As shown in FIG. 1, the second-stage detection unit (14) provided in the current detection means (12)
The motor operating current is detected via a shunt resistor (16), and the detected value of the motor operating current is compared with a second reference voltage (specifically, detection level 1) to determine the motor operating current. When the detected value reaches the second reference voltage (specifically, the detection level 1) which is the detection level in the above-described second step, it is possible to execute control for prompting a predetermined operation of the power window motor (21). And connected to the timer means (18). Note that the control for prompting a predetermined operation is defined as a power window motor (2) when a lock current of a predetermined detection level (that is, detection level 1) is detected.
1) control to lower the window by reversing 1) control to stop the power window motor (21) when a fully-open current of a predetermined detection level (that is, detection level 1) is detected;
Alternatively, when a fully-closed current of a predetermined detection level (that is, detection level 1) is detected, the power window motor (21)
Means stop.

The second-stage detection unit (14) specifically includes M
A microprocessor composed mainly of a PU and a voltage comparison means such as a comparator IC can be achieved as main parts. Next, the operation will be described.

First, the operation of the power window current detection circuit (10) according to the embodiment of the present invention will be described. Power window current detection circuit (10) according to an embodiment of the present invention
Can detect and control the opening and closing operation of the power window used in vehicles such as automobiles when the head and hands are caught and the window is locked during opening and closing, and the power window can be controlled. The power window motor (21) accurately detects the fully open state (that is, the state in which the power window is completely released) or the fully closed state (that is, the state in which the power window is completely closed).
Can be controlled to perform a predetermined operation.

A power window motor (21), which is a peripheral component of the power window current detection circuit (10), can open and close the power window. The solenoid (20) can be controlled by a solenoid driving means (19) which is a peripheral component of the power window current detection circuit (10).

A window opening / closing switch, which is a peripheral component of the power window current detection circuit (10), is a control switch for turning the power window motor (21) off or on. By operating and controlling this window opening / closing switch, the power window motor (2
1) operates to open and close the window in the vertical direction.

The operation of the power window current detection circuit (10) will be specifically described below. When the window is locked and the lock current (motor operation current) is detected by the shunt resistor (16), the timer means (18) measures the duration of the lock current (motor operation current), and the abnormal time continues for a certain time. In this case, the solenoid driving means (1
By activating the solenoid (20) to turn off the window opening / closing switch according to 9), it is possible to control the opening operation of the locked window.

The control of the opening operation of the window in the locked state according to the embodiment of the present invention specifically means a control for prompting a stop of the elevation of the window in the fully opened state or the locked state in the fully opened state. In a locked state other than (for example, a locked state in which a hand or a head is caught), it means control for prompting the lowering of the window.

The control for prompting a predetermined operation is a control for inverting the power window motor (21) to lower the window when a lock current of a predetermined detection level is detected,
Control to stop the power window motor (21) when a fully detected current at a predetermined detection level is detected, or to stop the power window motor (21) when completely closed current at a predetermined detection level is detected. Means control.

When the up switch or the down switch of the window opening / closing switch is operated for the purpose of opening / closing the window, the power window motor (21) is rotated to start opening / closing the window, and at the same time, the current detecting means (1) is operated.
2) A current proportional to the current flowing through the power window motor (21) flows through the shunt resistor (16).

When the lock current (motor operating current) continues to the timer means (18) for a certain period of time, the solenoid driving means operates the solenoid (20) to control the window opening / closing switch to turn off. Can be performed. For example, when the face or hands are caught during opening and closing of the window and the window is locked, the current detecting means (12) detects the locked state of the window from a lock current (motor operating current) flowing through the shunt resistor (16). be able to.

Thus, the power window motor (2
1) is operated in a predetermined manner, and the window is also operated in a predetermined position in the lock position, so that control for promoting danger avoidance can be executed. As a result, even when the motor operation current detection value such as the lock current, the fully-open current, or the fully-closed current decreases, the motor such as the lock current, fully-open current, or fully-closed current of the power window motor (21) is reduced. In addition to detecting the operating current detection value, it is possible to execute a control that prompts a predetermined operation of the power window motor (21) and also performs a predetermined operation of the window in the lock position to promote danger avoidance.

Further, it is possible to accurately detect whether the power window is fully opened or fully closed, and as a result, it is possible to prevent unnecessary consumption of the battery. Next, the operation of the timer means (18) according to the embodiment of the present invention will be described. The timer means (18) can measure the duration of the state in which the detected value of the motor operating current has reached a predetermined detection level, and can set the predetermined detection time of the motor operating current in multiple stages.

As shown in FIG. 2, for example, the timer means (18) detects the state in which the detected value of the motor operating current has reached a second reference voltage (specifically, detection level 1) which is a predetermined detection level. The duration can be measured, and a predetermined detection time of the motor operating current can be set to T1.

Similarly, the timer means (18) can measure the duration of the state where the detected value of the motor operating current has reached the first reference voltage (specifically, the detection level 2) which is the predetermined detection level. And a predetermined detection time of the motor operating current can be set to T2.

By allowing the timer means (18) to set a predetermined detection time of the motor operation current in multiple steps, the motor operation such as the lock current, the fully open current, or the fully closed current after a certain period of time has elapsed. Even if the current detection value decreases, the lock current of the power window motor (21)
A motor operation current detection value such as a fully-open current or a fully-closed current can be detected, and a predetermined operation of the power window motor (21) is promoted, and the window is also operated at a lock position to avoid danger. The prompting control can be executed.

Further, even after the lapse of years, it is possible to accurately detect the fully open state or the fully closed state of the power window, and as a result, it is possible to prevent unnecessary consumption of the battery. Next, the operation of the solenoid driving means (19) according to the embodiment of the present invention will be described.

As shown in FIG. 1, the solenoid drive means operates the solenoid (20) to open and close the window when the state in which the detected value of the motor operating current has reached a predetermined detection level has continued for a predetermined detection time. The power window motor (2
The control for prompting the predetermined operation of 1) can be executed. Note that the control for prompting the predetermined operation includes controlling the power window motor (21) to reverse the window when a lock current of a predetermined detection level is detected, and detecting the fully opened current of the predetermined detection level. Power window motor (21)
Or a control for stopping the power window motor (21) when a fully-closed current of a predetermined detection level is detected.

Next, the operation of the current detecting means (12) according to the embodiment of the present invention will be described. The current detection means (12)
The predetermined detection time is set in multiple stages (specifically, T
1, T2), and a predetermined detection level can be set in multiple stages (specifically, detection levels 1 and 2 in FIG. 2).
Detection level 2) can be set, and when the window of the vehicle (specifically, automobile) is locked, the lock current, the fully-opened current, or the fully-closed current of the power window motor (21) is operated by the motor. When the state in which the detected value of the motor operation current reaches a predetermined detection level for a predetermined detection time continues for a predetermined detection time, control for prompting a predetermined operation of the power window motor (21) can be executed. .

The shunt resistor (16) provided in the current detecting means (12) can detect the motor operating current. By allowing the current detection means (12) to set a predetermined detection level in multiple stages (specifically, detection level 1 and detection level 2 in FIG. 2), the lock current can be set after a certain period of time, Detecting the motor operation current detection value such as the lock current, the fully open current or the fully closed current of the power window motor (21) even when the motor operation current detection value such as the current or the fully closed current decreases. Power motor (2
It is possible to execute the control that prompts the user to avoid the danger by performing the predetermined operation in 1) and also performing the predetermined operation in the locked position of the window.

Further, even after the lapse of years, it is possible to accurately detect the fully open state or the fully closed state of the power window, and as a result, it is possible to prevent unnecessary consumption of the battery. Next, the operation of the current detecting means (12) according to the embodiment of the present invention will be specifically described.

As shown in FIG. 1, the current detecting means (12) includes a first reference voltage (specifically, detection level 2 in FIG. 2) and a second reference voltage (specifically, detection level in FIG. 2). A predetermined detection level can be set in two stages of level 1). A first reference voltage (specifically, detection level 2) and a second reference voltage (specifically, detection level 1), which are two predetermined detection levels, are connected in series with the reference voltage. It can be generated using the first resistor (15A), the second resistor (15B), and the third resistor (15C).

That is, the first reference voltage (specifically, the detection level 2) is: first reference voltage = {reference voltage × first resistance (15A)} / {first resistance (15A) + second resistance ( Fifteen
B) + third resistance (15C) can be obtained by a proportional formula. Similarly, the second reference voltage (specifically,
The detection level 1) is: second reference voltage = {reference voltage × {first resistance (15A) + second resistance (15B)} / {first resistance (15A) + second resistance (15B) + third resistance] (15
C) It can be obtained by the proportional formula of｝.

The shunt resistor (16) can detect a lock current (motor operating current) flowing through the power window motor (21) from both terminals. As shown in FIG. 1, the first-stage detection unit (13) provided in the current detection unit (12) converts the motor operation current to the shunt resistance (1).
6), the detected value of the motor operating current at this time is compared with a first reference voltage (specifically, detection level 2), and the detected value of the motor operating current at this time is When the power reaches the first reference voltage (specifically, the detection level 2) which is the detection level at the stage, control for prompting a predetermined operation of the power window motor (21) can be executed.
Note that the control for prompting the predetermined operation includes the control of reversing the power window motor (21) to reduce the window when the lock current of the predetermined detection level (that is, the detection level 2) is detected, and the predetermined detection. Level (that is, detection level 2)
Control to stop the power window motor (21) when the fully open current is detected, or when the fully closed current of a predetermined detection level (that is, detection level 2) is detected. ) Means control to stop. In the embodiment of the present invention, when the timer means (18) continuously detects the lock current for a predetermined time, it is determined that the lock current has been detected, and the control of the power window motor (21) is executed. I have.

As shown in FIG. 1, the second stage detecting section (14) provided in the current detecting means (12) detects the motor operating current via the shunt resistor (16), The detected value of the operating current is compared with the second reference voltage (specifically, the detection level 1), and the detected value of the motor operating current is the second reference voltage (the detection level in the second step). Specifically, it is possible to execute a control for prompting a predetermined operation of the power window motor (21) when the detection level 1) is reached. Note that the control for prompting a predetermined operation is a predetermined detection level (that is, detection level 1).
Is controlled to reverse the power window motor (21) when the lock current is detected to lower the window. When the fully opened current of a predetermined detection level (that is, detection level 1) is detected, the power window motor (21) is detected. 21), or when a fully closed current of a predetermined detection level (that is, detection level 1) is detected, the power window motor (2) is stopped.
This means control for stopping 1).

In the current detecting means (12), a first stage detecting section (13) and a second stage detecting section (14) are provided to provide a first reference voltage (specifically, a two-stage predetermined detecting level). By setting the detection level 2) and the second reference voltage (specifically, the detection level 1), the motor operating current such as the lock current, the fully open current, or the fully closed current after a certain period of time has passed. Even when the value decreases, a motor operating current detection value such as a lock current, a fully-open current, or a fully-closed current of the power window motor (21) can be detected, and a predetermined value of the power window motor (21) can be detected. It is possible to execute a control that prompts the operation and performs a predetermined operation at the lock position to promote the avoidance of danger.

Further, even after the lapse of years, it is possible to accurately detect whether the power window is fully open or fully closed, and as a result, unnecessary consumption of the battery can be prevented.

[0061]

According to the power window current detection circuit according to the present invention, even if the motor operation current detection value such as the lock current, the fully open current, or the fully closed current decreases after a certain period of time, the power can be reduced. Lock current of wind motor,
A motor operating current detection value such as a fully-open current or a fully-closed current can be detected, and a control that prompts a predetermined operation of the power window motor and also performs a predetermined operation of the window in the lock position to avoid danger. Can be performed.

Further, even after the lapse of years, it is possible to accurately detect the fully open state or the fully closed state of the power window, and as a result, it is possible to prevent unnecessary consumption of the battery.

[Brief description of the drawings]

FIG. 1 is a functional block diagram of a power window current detection circuit according to an embodiment of the present invention.

FIG. 2 is a graph illustrating a change over time of a motor operation current detection value such as a lock current, a fully open current, or a fully closed current of the power window motor according to the embodiment of the present invention.

FIG. 3 is a functional block diagram of a conventional power window current detection circuit.

FIG. 4 is a graph illustrating a change over time of a motor operation current detection value such as a lock current, a fully-opened current, or a fully-closed current of a conventional power window current detection circuit power window motor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Power window current detection circuit 12 Current detection means 13 First stage detection part 14 Second stage detection part 15A First resistance 15B Second resistance 15C Third resistance 16 Shunt resistance 18 Timer means 19 Solenoid driving means 20 Solenoid 21 Power window motor

Claims (1)

(57) [Claims] 1. A motor operating current is detected.
The detected value of the detected motor operating current is set in multiple stages
Current detection to detect that each of the predetermined detection levels has been reached
Output means and a detection state of each detection level by the current detection means.
Is measured and the measured time is high
Short for detection level, long for low detection level
Predetermined multi-step durations each set to
Timer means for detecting that the detection level has been reached.
That it has continued for the duration corresponding to the
When the immersion means detects,
A power window current detection circuit characterized by executing control for prompting a constant operation .