JPH09209650A - Power window current detection circuit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect a full open/full closed state of a power window even after the elapse of time with high accuracy and prevent useless energy consumption of a battery by detecting and setting a detection level and a detection time of operating current of a power window motor in multi-stages. SOLUTION: In a power window current detection circuit 10 which is capable of detecting and controlling an open and close operation of a window when a window of a vehicle is locked, a current detection means 12 detects a locking current, full open time current or full closed time current of a power window motor 21 as a motor operating current when the window of the vehicle is closed. When this detected value reaches a specified detection level, the control which urges a specified operation is executed where the current detection means 12 make it possible to set a specified detection level in multi-stages. This construction makes it possible to detect the lock current, the full open time current or full-closed time current of the power window motor 21 even when the motor operating current detection value drops due to the elapse of time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The power window current detection circuit of the present invention is capable of detecting and controlling the opening / closing operation of the window when the window is locked due to a head or hand being caught during opening / closing of the window. Regarding the circuit,
In particular, the present invention relates to a power window current detection circuit that can detect and control the opening / closing operation of a window when a head or a hand is caught and the window is locked during opening / closing of the power window used in a vehicle such as an automobile.

[0002]

2. Description of the Related Art A conventional power window current detecting circuit of this type is shown in FIG. That is, the power window current detection circuit 9 is composed of the power window motor 1, the power supply means 2, the current detection means 3, the timer means 4, the solenoid driving means 5, the solenoid 6, the window opening / closing switch 7, and the like.

The current detection means 3 detects the current flowing through the power window motor 1 when the window is opened and closed, and the shunt resistor 8 connected in parallel with the power window motor 1 is used.
Had. The shunt resistor 8 of the current detecting means 3 is provided with current terminals 8b and 8c and voltage terminals 8a and 8d, and a part of the motor current flowing through the power window motor 1 is locked by the current terminals 8b and 8c through the power window motor 1. The motor operating current such as the current, the fully open current, or the fully closed current can be detected from the current terminal of the shunt resistor 8.

Such a power window current detection circuit 9
In the above, when the face is locked by the face or hand during the opening and closing of the window, the current flowing through the power window motor 1 for opening and closing the window is 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 certain time, the power window motor 1 is automatically closed. A control for performing a predetermined operation has been executed.

[0006]

However, in such a conventional power window current detecting circuit 9, the shunt resistor 8 of the current detecting means 3 is provided with the current terminals 8b and 8c and the voltage terminals 8a and 8d, and the power window is detected. Motor 1
A part of the motor current flowing through is detected from the current terminals 8b and 8c as a motor operating current such as a lock current, a fully open current, or a fully closed current.

As shown in FIG. 4, the motor current flowing through the power window motor 1 is a lock current, a fully open current, or a fully closed current as shown in FIG. 4A at the beginning of use of the power window motor 1. , Etc., the motor operating current detection value such as the lock current, the fully open current, or the fully closed current decreases as shown in FIG. 4 (b) after a certain amount of time has elapsed. Therefore, it is difficult to detect the motor operating current detection value such as the lock current at the time of lapse of time, the fully open current, or the fully closed current at the detection level set at the beginning of use of the power window motor 1. there were.

For the same reason, 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) after the passage of time is accurately determined. However, there is a problem in that the battery may be exhausted due to unnecessary operation of the power window motor as a result.

The present invention has been made by paying attention to such a conventional problem, and is a detection level of a motor operating current detection value such as a lock current of the power window motor 1, a fully open current, or a fully closed current. And its lock current, full open current,
Alternatively, by installing a current detection unit that can detect the detection time of the motor operating current detection value such as full-closed current in multiple stages, lock current, full-open current, or full Even when the motor operating current detection value such as the closing current decreases, it is possible to detect the motor operating current detection value such as the lock current, the fully opening current, or the fully closing current of the power window motor. It is an object of the present invention to provide a power window current detection circuit capable of urging a predetermined operation of (1) and a predetermined operation of a window at a lock position to execute a control of urging to avoid danger.

Further, even after a 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, the power window current detection capable of preventing unnecessary consumption of the battery. It is intended to provide a circuit.

[0011]

Means for achieving the object are as follows. [1] In a power window current detection circuit capable of detecting and controlling the opening / closing operation of the window when the vehicle window is locked, when the vehicle window is locked, the lock current of the power window motor (21), full open Hour current or fully closed current is detected as motor operating current,
The current detection means (12) is provided with a current detection means (12) capable of executing control for promoting a predetermined operation of the power window motor (21) when the detected value of the motor operating current reaches a predetermined detection level. The power window current detection circuit (10) is characterized in that the predetermined detection level can be set in multiple stages.

The control for urging a predetermined operation is a control for reversing 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 open current of a predetermined detection level is detected, or stop the power window motor (21) when a fully closed current of a predetermined detection level is detected. Means control.

[2] Item In a power window current detection circuit capable of detecting and controlling the opening / closing operation of the window when the vehicle window is locked, the power window motor (21) is locked when the vehicle window is locked. The current, the fully open current, or the fully closed current is detected as the 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 (2
A power window current detection circuit (10) comprising a current detection means (12) capable of executing control for promoting a predetermined operation of 1).

[3] Item The predetermined detection time can be set in multiple stages, and the predetermined detection level can be set in multiple stages.
The power window current detection circuit (10) according to item [1 or 2].

[4] Item The duration of the state in which the detected value of the motor operating current reaches a predetermined detection level can be measured, and the predetermined detection time of the motor operating current can be set in multiple stages. The power window current detection circuit (1) according to item [3], further comprising timer means (18).
0).

[5] Item It is characterized by comprising a shunt resistor (16) connected in parallel with the power window motor (21), and the motor operating current can be detected by the shunt resistor (16). The power window current detection circuit (10) according to items [1] to [4].

[6] Item The current detecting means (12) has a first reference voltage and a second reference voltage generated using a first resistor (15A), a second resistor (15B) and a third resistor (15C). The power window current detection circuit (10) according to items [1] to [5], wherein the predetermined detection level can be set in two stages with a reference voltage.

[7] Item The current detecting means (12) detects the motor operating current via a shunt resistor (16) and compares the detected value of the motor operating current with the first reference voltage. First-stage detection unit capable of executing control for prompting a predetermined operation of the power window motor (21) when the detected value of the motor operating current reaches the first reference voltage which is the detection level in the first step (13) and the motor operating current are detected via a shunt resistor (16), and the detected value of the motor operating current is compared with the second reference voltage to obtain the detected value of the motor operating current. A second stage detection section (14) capable of executing control for promoting a predetermined operation of the power window motor (21) when the second reference voltage, which is a detection level in two stages, is reached. Features [ 1]
Paragraph [1] to [6] The power window current detection circuit (1
0). The control that prompts a predetermined operation means that the power window motor (21) is activated when a lock current of a predetermined detection level (that is, detection level 1 or detection level 2) is detected.
To lower the window by reversing the control, control to stop the power window motor (21) when a fully open current of a predetermined detection level (that is, detection level 1 or detection level 2) is detected, or predetermined detection The control means to stop the power window motor (21) when a fully closed current of a level (that is, detection level 1 or detection level 2) is detected.

[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. 2 is a graph illustrating the change over time in the detected value of the motor operating current such as the lock current, the fully open current, or the 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) of the embodiment of the invention will be described. Power window current detection circuit (10) according to an embodiment of the present invention
Is capable of detecting and controlling the opening / closing operation of the window when the head or hand is caught and the window is locked during opening / closing of the power window used in vehicles such as automobiles. Precisely detecting the fully open state of the power window (that is, the state where the power window is completely opened) or the fully closed state (that is, the state that the power window is completely closed), and causing the power window motor (21) to perform a predetermined operation. As shown in FIG. 1, it is possible to execute control to cause the current detection means (12), the solenoid driving means (19), the shunt resistor (16) and the timer means (18).

Further, as shown in FIG. 1, as a peripheral component of the power window current detection circuit (10), a power window motor (21), which is a power means for opening and closing the power window, and a solenoid driving means (19). ), A solenoid (20) controlled by a solenoid), a window opening / closing switch (not shown) which is a control switch for turning the power window motor (21) into an OFF state or an ON state by a solenoid driving means (19), and the like. Has been done.

Next, the structure of the timer means (18) of the embodiment of the invention will be described. The timer means (18)
As shown in FIG. 1, it is possible to measure the duration of the state in which the detected value of the motor operating current reaches a predetermined detection level, and to set the predetermined detection time of the motor operating current in multiple stages. It is connected to the detection means (12) and the solenoid drive means (19).

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

Similarly, the timer means (18) can measure the duration of the state in which the detected value of the motor operating current reaches 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 PU and a timing means such as a timer IC can be achieved as a main part. Next, the configuration of the solenoid drive means (19) of the embodiment of the invention will be described.

As shown in FIG. 1, the solenoid driving means operates the solenoid (20) to open and close the window when the detected value of the motor operating current reaches a predetermined detection level for a predetermined detection time. Power window motor (2
It is connected to the solenoid (20) and the timer means (18) so that the control for promoting the predetermined operation of 1) can be executed. The control for urging a predetermined operation is a control for reversing the power window motor (21) to lower the window when a lock current of a predetermined detection level is detected, and a fully open current of a predetermined detection level is detected. In this case, the control means stops the power window motor (21) when the electric power is on, or the control that stops the power window motor (21) when the fully closed current of a predetermined detection level is detected.

Specifically, the solenoid driving means (19) can be achieved mainly by a microprocessor mainly composed of an MPU and a solenoid driving means such as a switching transistor. Next, the configuration of the current detecting means (12) of the embodiment of the invention will be described.

As shown in FIG. 1, the current detecting means (12) can set a predetermined detection time in multiple stages (specifically, T1 and T2 in FIG. 2), and at the same time 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 wind of the vehicle (specifically, automobile) is locked, the power wind motor (21) When the lock current, full open current, or full close current is detected as the motor operating current and the detected value of the motor operating current at this time reaches the specified detection level for the specified detection time, the power window motor The first stage detection unit (13), the second stage detection unit (14), the first resistor (15A), the second resistor (15B), the first resistor (15B) Three resistance (1
5C) as a device.

The current detecting means (12) includes a first-stage detecting section (1) so that a predetermined detection level can be set in multiple stages.
3), the second stage detector (14), the first resistor (15A), the second resistor (15B) and the 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.

The current detecting means (12) is specifically M
A microprocessor mainly composed of PU, a first stage detector (13), a second stage detector (14), a first resistor (15A), a second resistor (15B) and a third resistor (15).
C) and can be achieved as a main part.

Next, the configuration of the current detecting means (12) of the embodiment of the invention will be specifically described. Current detection means (1
2) is, 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). The first resistor (15
A), second resistor (15B), and third resistor (15C)
It is connected to.

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

That is, the first reference voltage (specifically, the detection level 2) is the first reference voltage = {reference voltage × first resistance (15A)} / {first resistance (15A) + second resistance ( 15
B) + third resistance (15C)}. Similarly, the second reference voltage (specifically,
Detection level 1) is the second reference voltage = {reference voltage × {first resistance (15A) + second resistance (15B)}} / {first resistance (15A) + second resistance (15B) + third resistance (15
C)} proportional calculation formula.

The first stage detector (13) is, specifically, M
A microprocessor mainly composed of PU and a voltage comparing means such as a comparator IC can be achieved as a main part. As shown in FIG. 1, the first stage detection unit (13) installed in the current detection means (12)
The motor operating current is detected through the shunt resistor (16), and the detected value of the motor operating current at this time is compared with the first reference voltage (specifically, detection level 2) to perform the motor operation at this time. When the detected value of the current reaches the first reference voltage (specifically, the detection level 2) which is the detection level at the first stage, it is possible to execute the control that prompts the predetermined operation of the power window motor (21). It is connected to the timer means (18). The control that prompts a predetermined operation means that the power window motor (2) is activated when a lock current of a predetermined detection level (that is, detection level 2) is detected.
1) The control of reversing 1) to lower the window, the control of stopping the power window motor (21) when the fully 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)
It means the control to stop.

The first stage detector (13) is specifically M
A microprocessor mainly composed of PU and a voltage comparing means such as a comparator IC can be achieved as a main part. As shown in FIG. 1, the second stage detector (14) installed in the current detecting means (12)
The motor operating current is detected via the shunt resistor (16), and the detected value of the motor operating current is compared with the second reference voltage (specifically, detection level 1) to detect the motor operating current. When the detected value reaches the second reference voltage (specifically, the detection level 1) which is the detection level at the above-mentioned second stage, it is possible to execute the control for prompting the predetermined operation of the power window motor (21). So that it is connected to the timer means (18). The control that prompts a predetermined operation means that the power window motor (2) is activated when a lock current of a predetermined detection level (that is, detection level 1) is detected.
1) Control for reversing and lowering the window, control for stopping 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)
It means the control to stop.

The second stage detector (14) is, specifically, M
A microprocessor mainly composed of PU and a voltage comparing means such as a comparator IC can be achieved as a main part. Next, the operation will be described.

First, the operation of the power window current detection circuit (10) according to the embodiment of the invention will be described. Power window current detection circuit (10) according to an embodiment of the present invention
Is capable of detecting and controlling the opening / closing operation of the window when the window is locked due to a head or hand being caught during opening / closing of the power window used in vehicles such as automobiles. The power window motor (21) by accurately detecting the fully open state (that is, the state where the power window is completely opened) or the fully closed state (that is, the state that the power window is completely closed).
It is possible to execute a control for causing the predetermined operation.

The 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).

The window open / close 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) into an OFF state or an ON state. By operating and controlling this window open / close switch, the power window motor (2
1) operates and the window can be opened and closed vertically.

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 operating current) is detected by the shunt resistor (16), the timer means (18) measures the lock current (motor operating current) duration and the abnormal time continues for a certain period of time. If the solenoid drive means (1
By activating the solenoid (20) by 9) and turning off the window opening / closing switch, it is possible to control the opening operation of the window in the locked state.

The control of the opening operation of the window in the locked state according to the embodiment of the present invention specifically means the control of urging the lifting and lowering of the window in the fully opened state or in the locked state at the fully opened state. In a locked state other than the above (for example, a locked state in which a hand or a head is pinched), it means a control for promoting the lowering of the window.

The control for urging the predetermined operation is a control for lowering the window by reversing the power window motor (21) when a lock current of a predetermined detection level is detected.
Control to stop the power window motor (21) when a fully open current of a predetermined detection level is detected, or stop the power window motor (21) when a fully closed current of a predetermined detection level is detected. Means control.

When the up switch or 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 of the window, and at the same time, the current detecting means (1
A current proportional to the current flowing through the power window motor (21) flows through the shunt resistor (16) of 2).

When the lock current (motor operating current) continues to be supplied to the timer means (18) for a certain period of time, the solenoid drive means operates the solenoid (20) to control the window opening / closing switch to be turned off. Can be executed. For example, when the window is locked due to a face or hand being caught during opening / closing of the window, the current detection means (12) detects the locked state of the window from the lock current (motor operating current) flowing through the shunt resistor (16). be able to.

As a result, the power window motor (2
1) is operated in a predetermined manner and the window is also operated in the locked position in a predetermined manner, so that it is possible to execute control for promoting avoidance of danger. As a result, even if the detected value of the motor operating current such as the lock current, the fully open current, or the fully closed current decreases, the motor such as the lock current, the fully open current, or the fully closed current of the power window motor (21). In addition to being able to detect 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 a predetermined operation of the window at the lock position to avoid danger.

Further, 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 timer means (18) of the embodiment of the 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.

For example, as shown in FIG. 2, the timer means (18) is in a state where the detected value of the motor operating current has reached a second reference voltage (specifically, the detection level 1) which is a predetermined detection level. The duration can be measured, and the 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 in which the detected value of the motor operating current reaches the first reference voltage (specifically, the detection level 2) which is the predetermined detection level. In addition, the predetermined detection time of the motor operating current can be set to T2.

By enabling the timer means (18) to set the predetermined detection time of the motor operating current in multiple stages, the motor operation such as the lock current, the fully open current, or the fully closed current when a certain amount of time has passed. Even if the current detection value drops, the lock current of the power window motor (21),
It is possible to detect the motor operating current detection value such as the fully open current or the fully closed current, and to prompt the predetermined operation of the power window motor (21) so that the window also operates at the lock position to avoid danger. Prompt controls can be implemented.

Further, even when the years have passed, 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 drive means (19) of the embodiment of the invention will be described.

As shown in FIG. 1, the solenoid driving means operates the solenoid (20) to open and close the window when the detected value of the motor operating current reaches a predetermined detection level for a predetermined detection time. Power window motor (2
The control for prompting the predetermined operation of 1) can be executed. The control for urging a predetermined operation is a control for reversing the power window motor (21) to lower the window when a lock current of a predetermined detection level is detected, and a fully open current of a predetermined detection level is detected. 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) of the embodiment of the invention will be described. The current detection means (12) is
The predetermined detection time is set in multiple steps (specifically, T in FIG.
1, T2), and a predetermined detection level is set in multiple stages (specifically, detection level 1 in FIG.
It can be set at the detection level 2), and when the window of the vehicle (specifically, automobile) is locked, the lock current, the fully open current, or the fully closed current of the power window motor (21) is operated by the motor. It is possible to execute control for urging the power wind motor (21) to perform a predetermined operation when it is detected as a current and the detected value of the motor operating current at this time reaches a predetermined detection level for a predetermined detection time. .

The shunt resistor (16) provided in the current detecting means (12) can detect the motor operating current. By setting the predetermined detection level in the current detection means (12) in multiple stages (specifically, detection level 1 and detection level 2 in FIG. 2), the lock current at the time of a certain amount of time, when fully opened Current, or even when the motor operating current detection value such as full-closed current decreases, detect the motor operating current detection value such as the lock current, the fully open current, or the fully closed current of the power window motor (21). Power window motor (2
It is possible to execute the control of urging the predetermined operation of 1) and the wind to perform the predetermined operation at the lock position so as to avoid the danger.

Further, even when the years have passed, 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) of the embodiment of the 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 2 in FIG. 2). A predetermined detection level can be set in two steps including level 1). The first reference voltage (specifically, detection level 2) and the second reference voltage (specifically, detection level 1), which are two predetermined detection levels, are connected in series to 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 the first reference voltage = {reference voltage × first resistance (15A)} / {first resistance (15A) + second resistance ( 15
B) + third resistance (15C)}. Similarly, the second reference voltage (specifically,
Detection level 1) is the second reference voltage = {reference voltage × {first resistance (15A) + second resistance (15B)}} / {first resistance (15A) + second resistance (15B) + third resistance (15
C)} proportional calculation formula.

In the shunt resistor (16), the lock current (motor operating current) flowing through the power window motor (21) can be detected from both terminals thereof. As shown in FIG. 1, the first-stage detection unit (13) installed in the current detection means (12) detects the motor operating current as a shunt resistance (1).
6), the detected value of the motor operating current at this time is compared with the first reference voltage (specifically, the detection level 2), and the detected value of the motor operating current at this time is first detected. When the first reference voltage (specifically, detection level 2), which is the detection level at the stage, is reached, it is possible to execute control that prompts a predetermined operation of the power window motor (21).
The control for urging a predetermined operation is a control for lowering the window by reversing the power window motor (21) when a lock current having a predetermined detection level (that is, detection level 2) is detected. Level (that is, detection level 2)
Control to stop the power window motor (21) when the fully open current of the power supply is detected, or when the fully closed current of a predetermined detection level (that is, detection level 2) is detected. ) Means 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 is detected and the control of the power window motor (21) is executed. There is.

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), and at the same time, the above-mentioned motor The detected value of the operating current and the second reference voltage (specifically, detection level 1) are compared, and the detected value of the motor operating current described above is the second reference voltage (which is the detection level at the second stage described above). Specifically, it is possible to execute control that prompts a predetermined operation of the power window motor (21) when the detection level 1) is reached. The control that prompts a predetermined operation means a predetermined detection level (that is, detection level 1).
When the lock current is detected, the power window motor (21) is inverted to lower the window. When the full-open current of a predetermined detection level (that is, detection level 1) is detected, the power window motor (21) is detected. 21) stop control, or when a fully closed current of a predetermined detection level (that is, detection level 1) is detected, the power window motor (2
It means a control for stopping 1).

The current detecting means (12) is provided with a first stage detecting section (13) and a second stage detecting section (14), and a first reference voltage (specifically, a two stage predetermined detection level) (specifically, 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 is detected when a certain amount of time has passed. Even when the value decreases, it is possible to detect the motor operating current detection value such as the lock current, the fully open current, or the fully closed current of the power window motor (21), and the predetermined value of the power window motor (21) is detected. It is possible to execute a control that prompts an operation and also causes the window to perform a predetermined operation in the lock position to avoid danger.

Further, even when the years have passed, 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.

[0061]

According to the power window current detection circuit of the present invention, the detection level of the motor operating current detection value such as the lock current of the power window motor, the fully open current, or the fully closed current, and the lock current and the fully open current of the detected value. By setting the current detection means that can set the detection time of the motor operating current detection value such as the current current or the fully closed current in multiple stages, the lock current, the fully open current when a certain amount of time has passed ,
Even if the motor operating current detection value such as the fully closed current decreases, it is possible to detect the motor operating current detection value such as the lock current of the power window motor, the fully open current, or the fully closed current, and It is possible to execute a control that prompts a predetermined operation of the wind motor and also a predetermined operation of the window in the lock position so as to avoid danger.

Further, even after a 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 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 in a detected value of a motor operating current such as a lock current, a fully open current, or a fully closed current of a power window motor according to an 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 in a detected value of a motor operating current such as a lock current, a fully open current, or a fully closed current of a conventional power window current detection circuit power window motor.

[Explanation of symbols]

 10 power window current detection circuit 12 current detection means 13 first stage detection section 14 second stage detection section 15A first resistance 15B second resistance 15C third resistance 16 shunt resistance 18 timer means 19 solenoid drive means 20 solenoid 21 power wind motor

Claims (7)

[Claims] 1. A power window current detection circuit capable of detecting and controlling the opening / closing operation of a window when the vehicle window is locked, wherein a lock current and a fully open current of a power window motor when the vehicle window is locked. , Or a current detection means capable of detecting the fully closed current as the motor operating current and executing control for prompting a predetermined operation of the power window motor when the detected value of the motor operating current reaches a predetermined detection level. The power window current detection circuit, wherein the current detection means is capable of setting the predetermined detection level in multiple stages. 2. A power window current detection circuit capable of detecting and controlling opening / closing operation of a window when a vehicle window is locked, wherein a lock current and a fully open current of a power window motor when the vehicle window is locked. , Or the full-closed current is detected as the motor operating current, and control is performed to prompt the predetermined operation of the power window motor when the detected value of the motor operating current reaches the predetermined detection level for the predetermined detection time. A power window current detection circuit comprising: an executable current detection means. 3. The power window according to claim 1 or 2, wherein the predetermined detection time can be set in multiple stages and the predetermined detection level can be set in multiple stages. Current detection circuit. 4. A timer means capable of measuring the duration of a state in which the detected value of the motor operating current reaches a predetermined detection level and setting the predetermined detection time of the motor operating current in multiple stages. 4. The power window current detection circuit according to claim 3, further comprising: 5. The power window current according to any one of claims 1 to 4, comprising a shunt resistor connected in parallel with the power window motor, wherein the motor operating current can be detected by the shunt resistor. Detection circuit. 6. The current detecting means sets the predetermined detection level in two stages of a first reference voltage and a second reference voltage generated by using a first resistor, a second resistor and a third resistor. It is possible, The power window current detection circuit of Claims 1-5 characterized by the above-mentioned. 7. The current detecting means detects the motor operating current via a shunt resistor and compares the detected value of the motor operating current with the first reference voltage to detect the detected value of the motor operating current. A first stage detection unit capable of executing control to prompt a predetermined operation of the power window motor when the first reference voltage, which is the detection level in the first stage, is executed, and the motor operating current is passed through a shunt resistor. When the detected value of the motor operating current reaches the second reference voltage which is the detection level at the second stage by comparing the detected value of the motor operating current with the second reference voltage. The power window current detection circuit according to any one of claims 1 to 6, further comprising: a second stage detection unit capable of executing control for promoting a predetermined operation of the power window motor.