JP6402798B2 - Control device for vehicle power window device - Google Patents

Description

  The present invention relates to a control device for a vehicle power window device, and more particularly to a control device for a vehicle power window device that consumes less power by constructing a so-called sleep state.

  In general, a vehicle is provided with an electronic control unit (hereinafter simply referred to as “ECU”) in order to control each mounted device. And in order to implement | achieve the power saving of a vehicle, when predetermined conditions are prepared, this ECU will be set as what is called a "sleep state" (standby state), and it is comprised so that it may wake up as needed. (For example, refer to Patent Document 1 and Patent Document 2).

Patent Document 1 discloses a vehicle control system. The vehicle control system described in Patent Document 1 includes a plug-in ECU, a power management ECU, and a shift lock ECU. The plug-in ECU is always provided with a power supply circuit, a sub-microcomputer, a main power supply circuit, and a main microcomputer. The sub-microcomputer has low power consumption and is always in a standby state (so-called “sleep mode”) in which it can always operate with the power supplied from the power supply circuit. In this state, input of external signals, etc. It has become a specification to wake up according to.
Patent Document 2 also discloses an automobile control unit, which describes an ECU with low power consumption. That is, there is disclosed an ECU configured to shift to a sleep mode under a predetermined condition and to wake up when a wakeup signal is received.

JP 2012-205313 A JP 2007-022355 A

  In the case of such a technology, for example, it is desirable that the ECU is configured to wake up by detecting a switch signal resulting from a switch operation of a device mounted on the vehicle. In the case of the technique described in Document 2, since noise gets on the signal line through which the switch signal is transmitted and the ECU mistakes this noise as the switch signal, the wakeup is executed by mistake. There was a problem of end.

  An object of the present invention is to solve the above-mentioned problems, and wakeup execution by an erroneous signal caused by noise or the like is performed by discriminating between a correct signal input and an erroneous signal input due to noise or the like. It is an object of the present invention to provide a control device for a vehicle power window device that can effectively prevent the above.

According to the control apparatus for a vehicle power window device according to the present invention, the vehicle power window device is operated by operating the window operation switch, and is saved from the normal power state when no operation is performed for a predetermined time. A control device for a vehicle power window device equipped with a microcomputer configured to switch to a power state and wait for reception of an operation signal of the window operation switch in the power saving state, wherein the microcomputer is A power saving state signal storage unit for storing a previous mode which is a mode immediately before the transition to the power saving state, and the control device for the microcomputer and the vehicle power window device includes the power saving state signal storage unit Immediately after memorizing the previous mode, the normal power state shifts to the power saving state. When the operation signal is detected in the power saving state, the microcomputer wakes up to the normal power state, and the change mode changed by the detected operation signal is stored in the power saving state signal storage unit. Wake-up transition for determining whether or not to maintain a power saving state based on the immediately preceding mode and waiting for a determination result as to whether or not the control device for the vehicle power window device maintains a power saving state If the change mode is a mode when the window operation switch is in an off state based on a result of comparing the previous mode and the change mode , the power saving state is entered. becomes the determination result of maintaining Zhou said control device for the vehicle power window device wakeup shift determination waiting The microcomputer as well as return to the power-save status is solved by returning the wakeup power-saving state from.

With this configuration, when a signal (edge) is generated in a power saving state (so-called sleep mode), it is normal (that is, a signal requesting wakeup). Can be accurately determined on the software side.
In other words, it is possible to determine whether or not to maintain the power saving state based on the result of comparing the immediately preceding mode and the change mode, so that it is possible to avoid wakeup due to an edge caused by noise or the like riding on the signal line. Can do.
Specifically, the switch port level immediately before the transition to the power saving state is stored as the immediately preceding mode, and the switch port level immediately after the occurrence of the input signal (edge) detected in the power saving state is detected as the change mode. It is good to be comprised so that both may be compared.

  The determination as to whether or not to maintain the power saving state performed based on the immediately preceding mode and the change mode is preferably performed in a state where the power consumption is lower than that in the normal power state.

Furthermore, it is preferable that the determination as to whether or not to maintain the power saving state, which is performed based on the immediately preceding mode and the change mode, be performed in a state where the power consumption is higher than the power saving state.
With this configuration, during the determination, the state of the control device for the vehicle power window device is determined between the normal power state and the state that is not in the power saving state, or both. The state can be smoothly changed to the state transition or the power saving state maintenance.

According to the present invention, when a signal input occurs in the power saving state, it is possible to determine whether the input signal is a correct signal input or an incorrect signal input due to noise or the like.
Therefore, it is possible to effectively prevent execution of wakeup due to an erroneous signal caused by noise or the like.

It is an electrical block diagram of the control apparatus for vehicle power window apparatuses which concern on one Embodiment of this invention. It is a control conceptual diagram of the control apparatus for vehicle power window devices concerning one embodiment of the present invention. It is a control flowchart of the control apparatus for vehicle power window devices concerning one embodiment of the present invention. It is a control timing chart of the control device for vehicle power window devices concerning one embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Note that the configuration described below does not limit the present invention and can be variously modified within the scope of the gist of the present invention.
In this embodiment, a vehicle power window device that can effectively prevent wake-up execution due to an erroneous signal caused by noise or the like by determining whether the signal input is correct or an incorrect signal input due to noise or the like. It is related with the control apparatus for this.

  1 to 4 show an embodiment of the present invention. FIG. 1 is an electrical configuration diagram of a control device for a vehicle power window device, and FIG. 2 is a conceptual diagram of control of the control device for a vehicle power window device. FIG. 3 is a control flowchart of the control device for the vehicle power window device, and FIG. 4 is a control timing chart of the control device for the vehicle power window device.

  A control device according to the present embodiment (hereinafter simply referred to as “ECU1”) is a control device for the vehicle power window device P. The configuration of the ECU 1 will be briefly described with reference to FIG.

An ECU 1 (Electronic Control Unit 1) according to this embodiment includes a power supply circuit 11, a microcomputer 12, an input circuit 13, a drive circuit 14, and a Hall IC 15.
The power supply circuit 11 is connected to a battery 20 provided outside, and supplies power to the microcomputer 12.
The microcomputer 12 is a microcomputer having a CPU, a ROM, a RAM, and the like, and is the center of control.
The microcomputer 12 corresponds to a “control unit”, and a storage device such as a RAM and a ROM (not shown) mounted on the microcomputer 12 corresponds to a “power saving state signal storage unit”.

The drive circuit 14 transmits a command from the microcomputer 12 to an external motor M, and the motor M drives the power window device P.
The input circuit 13 receives the ascending command UP and the descending command DN from the external window operation switch SW and transmits them to the microcomputer 12.
The Hall IC 15 performs position detection.

The concept of control of the ECU 1 according to the present invention will be described with reference to FIG.
Conventionally, as shown in FIG. 2A, the switch port is switched from a sleep state to a wake-up state by an edge generated when the switch port is switched between a low state (LO) and a high state (HI).
In other words, the conventional microcomputer 12 having only the both-edge detection function is configured to shift to the wake-up state regardless of the rising edge or the falling edge.

However, in this embodiment, the state of the switch port in the sleep state is stored as shown in FIG. 2B, instead of switching from the sleep state to the wake-up state simply by detecting an edge. When the edge is detected, the switch port level in the sleep state is a high state (HI) and the current switch port level is a low state (LO). It was decided that the wake-up process was performed.
That is, the rising edge and the falling edge, which cannot be determined only by the both-edge detection function, are distinguished on the software side.

The control of the microcomputer 12 will be described with reference to FIGS.
FIG. 3 shows a flowchart.
First, when a sleep request is generated in step S1, the level of the switch port before sleep is stored in step S2.
That is, it is determined and stored whether the switch port level is in a high state (HI) or a low state (LO).
The level of the switch port before the sleep corresponds to the “previous mode”.
Then, after storing the switch port level, the state is shifted to the sleep state in step S3.

If it is confirmed that a switch port edge has occurred, the switch port level after wakeup is stored in step S4.
The level of the switch port immediately after the occurrence of this edge corresponds to the “change mode”.
Next, in step S5, the switch port level stored before sleep (obtained and stored in step S2) and the switch port level after wakeup (acquired and stored in step S4) are read and determined.

  This is because the switch port level stored before sleep (obtained and stored in step S2) is high (HI), and the switch port level after wakeup (obtained and stored in step S4) is low. This is an operation for determining whether or not (LO).

The switch port level stored before sleep (obtained and stored in step S2) is in the high state (HI), and the switch port level after wakeup (obtained and stored in step S4) is in the low state ( If the determination that it is (LO) is negative (step S5: No), the process returns to step S2.
That is, the sleep state continues.

  Conversely, the switch port level stored before sleep (obtained and stored in step S2) is high (HI), and the switch port level after wakeup (obtained and stored in step S4) is low. If the determination of (LO) is affirmed (step S5: Yes), a wake-up process is performed in step S6, and the process is terminated.

Next, referring to FIG. 4, the processing of the flowchart will be described with reference to a timing chart.
FIG. 4A is a timing chart when the determination in step S5 of FIG. 3 is affirmed and the wake-up process is performed, and FIG. 4B is a result of the determination in step S5 of FIG. It is a timing chart at the time of going into a sleep state.
In the example of FIG. 4A, it is confirmed that the switch port level before the ECU 1 in which the microcomputer 12 is mounted enters the sleep state is in the high state (HI).
If a pulse edge is confirmed in this state, the ECU 1 waits for a wakeup determination, and the level of the switch port is confirmed in this state (in a wakeup determination wait state after wakeup).

In this example, after the wakeup, because it is confirmed the switch port level is low state (LO), and conditions are satisfied and that before the switch port level as a sleep state is at the high state (HI) (Corresponding to affirmative determination in step S5 in FIG. 3)
The state of the ECU 1 on which the microcomputer 12 is mounted shifts to the wake-up state.

In contrast, in the example of FIG. 4B, it has been confirmed that the switch port level before the ECU 1 in which the microcomputer 12 is mounted enters the sleep state is in the low state (LO).
If a pulse edge is confirmed in this state, the ECU 1 waits for a wakeup determination, and the level of the switch port is confirmed in this state (in a wakeup determination wait state after wakeup).
In this example, it is confirmed that the switch port level is in a high state (HI) after wakeup.

  Therefore, the AND condition that the switch port level before entering the sleep state is high (HI) and the switch port level after wakeup is low (LO) is not satisfied (step S5 in FIG. 3). In response to a negative determination in step S3), the state of the ECU 1 in which the microcomputer 12 is mounted returns from the wakeup determination waiting state to the sleep state.

Thus, according to the present embodiment, it is possible to discriminate between correct signal input and erroneous signal input due to noise or the like with only one edge.
In other words, when an edge occurs in the switch port, the correct signal input is made by determining on the software side the switch port state before the sleep state and the switch port state after wakeup (while waiting for wakeup determination) And erroneous signal input due to noise or the like can be discriminated.
Therefore, it is possible to effectively prevent execution of wakeup due to an erroneous signal caused by noise or the like.

1 ECU (control device for vehicle power window device)
11 Power supply circuit 12 Microcomputer 13 Input circuit, 14 Drive circuit 15 Hall IC, 20 Battery M Motor, P Power window device SW Window operation switch

Claims (3)

The vehicle power window device is operated by operating the window operation switch, and when the operation is not performed for a predetermined time, the normal power state is switched to the power saving state, and the operation signal of the window operation switch is switched in the power saving state. A control device for a vehicle power window device equipped with a microcomputer configured to wait for reception,
The microcomputer includes a power saving state signal storage unit that stores a previous mode that is a mode immediately before a transition to a power saving state,
The control device for the microcomputer and the vehicle power window device shifts from a normal power state to a power saving state immediately after the power saving state signal storage unit stores the immediately preceding mode,
When the operation signal is detected in the power saving state, the microcomputer wakes up to the normal power state, and the change mode changed by the detected operation signal is stored in the power saving state signal storage unit. Wake-up transition for determining whether or not to maintain a power saving state based on the immediately preceding mode and waiting for a determination result as to whether or not the control device for the vehicle power window device maintains a power saving state Waiting for a decision
The determination that the power saving state is maintained when the change mode is a mode when the state of the window operation switch is an off state based on a result of comparing the immediately preceding mode and the change mode. results and becomes the vehicle power window in which the microcomputer together with the vehicle power window the controller for the device is restored from the state of wake-up shift determining waiting to the power saving state, characterized in that the return from wakeup power-saving state Control device for the device.   The determination as to whether or not to maintain a power saving state, which is performed based on the immediately preceding mode and the change mode, is performed in a state where power consumption is lower than in a normal power state. The control apparatus for vehicle power window apparatus of description.   The determination as to whether or not to maintain the power saving state, which is performed based on the immediately preceding mode and the change mode, is performed in a state where the power consumption is higher than the power saving state. A control device for a vehicle power window device according to claim 2.

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