KR100844370B1 - Setting and updating method of limit position of ims - Google Patents

Abstract

A method for setting and updating a limit position of an IMS is provided to set and optimize control factors through a DFSS scheme so that a system is optimized by using a limit switch and by deleting the circuit of the limit switch. The restriction of a motor is determined according to the input variation of a sensor of the motor for a predetermined time if a seat or an electric column moves through motor driving(S304). The restriction of the motor is determined if the input variation of the sensor is absent, and a physical limit position is set after power is applied(S306). A logical limit position is set(S310). The logical limit position is updated when the motor is restricted before an IMS switch reaches the set logical limit position(S322).

Description

Setting and Updating Method of Limit Position of IMS

1 is a block diagram of a conventional IMS,

2 is a block diagram of an IMS in accordance with the present invention;

3 is a flowchart of a limit position setting and updating method according to the present invention;

4A and 4B are detailed flowcharts of FIG. 3;

5A and 5B are conceptual diagrams of limit positions and sensor error and limit update condition determination conceptual diagrams to help understanding of the present invention;

6A to 6D are timing charts of control factors applied to the present invention.

The present invention relates to a method for setting and updating a limit position of an IMS, and more particularly, to delete a limit switch and to set and update a limit position even when a motor is driven by a manual switch, and to set a control factor using a DFSS technique. And how you can optimize it.

Recently, many integrated memory systems (IMS) have been applied to automobiles. These integrated memory systems remember the optimal seat, motorized column and mirror positions set by different drivers, It automatically locates the seat, motorized column, and mirror position corresponding to the mode, and provides convenience of getting on and off by changing seat reversal and electric column position when getting off.

Fig. 1 is a schematic block diagram of the above-described IMS, particularly in the case of storing and reproducing positions of sheets and motorized columns.

As shown, IMS switch 10, driver door module 20, seat control unit 30, seat manual switch 40, seat motor 50, seat limit switch 60, electric column control unit 70 ), An electric column manual switch 80, an electric column motor 90, and an electric column limit switch 100.

The IMS switch 10 is composed of a set switch and a plurality of driver switches. The IMS switch 10 is a driver's input means for storing positions of seats or electric columns and moving them to positions of seats or electric columns.

The driver door module 20 receives a signal from the IMS switch 10 and transmits the signal to the seat control unit 30 or the electric column control unit 70 through CAN communication.

The seat manual switch 40 includes slide forward / backward switches 42a / 42b, recline forward / backward switches 44a / 44b, front height up / down switches 46a / 46b, rear height up / down switches. (48a / 48b), and when the sheet manual switch 40 is pressed, when the on signal of the switch is input to the seat control unit 30, the seat control unit 30 accordingly switches the sheet corresponding to the switch. The motor 50 is controlled.

The seat motor 50 includes a slide motor 52, a recline motor 54, a front height motor 56, and a rear height motor 58 so as to correspond to the seat manual switch 40. The sheet is moved to a desired position by the control of 30).

For example, when the recline forward switch 44a is pressed, the on signal of the recline forward switch 44a is input to the seat control unit 30, and the seat control unit 30 controls the recline motor 54. As a result, the recline motor 54 is rotated so that the seat back of the seat is inclined forward.

The motorized column manual switch 80 is composed of a tilt forward / backward switch 82a / 82b and a telescope up / down switch 84a / 84b. When the motorized column manual switch 80 is pressed, the switch is turned on. When a signal is input to the electric column control unit 70, the electric column control unit 70 controls the electric column motor 90 corresponding to the switch accordingly.

The electric column motor 90 is composed of a tilt motor 92 and a telescope motor 94 so as to correspond to the electric column manual switch 80, and a desired position of the electric column under the control of the electric column control unit 70. Move to.

For example, when the telescope up switch 84a is pressed, the on signal of the telescope up switch 84a is input to the electric column control unit 70, and the electric column control unit 70 is the telescope motor 94. By controlling the telescope motor 94 is rotated so that the electric column of the steering shaft is raised to the top.

When the electric column and the seat are moved to the position suitable for the driver in this way, when the set switch and the driver switch of the IMS switch 10 are pressed, the current motor (the sensor 50a, 90a of the motor 50, 90 is provided). The rotational position of the 50 and 60 is sensed and transmitted to the seat control unit 30 and the electric column control unit 70, and the seat control unit 30 and the electric column control unit 70 store the position.

The sensors 50a and 90a embedded in the motors 50 and 90 generate a waveform when the motor operates as a hall sensor.

When the driver switch of the IMS switch 10 is pressed after the seat and the motor column are stored, the ON signal of the driver switch is transmitted through the driver door module 20 to the seat control unit 30 and the motor column control unit 70. The regeneration signal is inputted, and the seats and the electric column are moved to the position desired by the driver by rotating the motors 50 and 90 by the control of the seat control unit 30 and the electric column control unit 70. Done.

Here, the limit switches 60 and 100 recognize the front and rear positions of each motor moving section during IMS reproduction.

Such a conventional IMS has a quality problem due to a defective limit switch unit defect such as a slide limit switch case deviation phenomenon.

For example, if the limit switch is always shorted due to a bad limit switch, it is not recognized as an end even when the end is moved.Therefore, there is a problem of shortening the life of the motor and applying excessive force to the drive shaft by flowing an overcurrent to the motor.The limit switch is always open. If it was recognized as the end of the end there was a problem that the motor is not driven.

Because of this problem, instead of deleting the limit switch, if the restraint occurs during power-up after the power is applied to recognize the limit position, it is recognized as a limit unconditionally, that is, the initialization process or the limit position in software when there is no sensor input. Variable ways are disclosed.

In the method of initializing the electronics, the limit position is erased when the battery is attached or detached, and there is a possibility of malfunction, and when the initial setting is not constrained at the actual limit stage (by pinching, etc.), the wrong position is recognized as the limit position. There was a problem that can not move more.

If the latter sensor is not recognized as a limit and the limit position is changed, memory storage and playback are not a problem, but the limit position is changed to solve the limit misrecognition during intermediate pinching. When the switch is ON, the motor output is always enabled to limit the variable. In this case, the motor output is mechanically stopped. This has a problem of shortening the motor life and generating a mechanical stop sound at the end.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is possible to set and update the limit even when the motor is driven by a manual switch, and by setting and optimizing the control factor using the DFSS technique, the limit switch and its circuit are deleted. Its purpose is to provide a limit position setting and updating method for IMS that can simplify the system, reduce the cost and prevent mechanical stop sound.

Limit position setting and updating method of the IMS according to the present invention for achieving the above object, the sensor provided in the motor for a predetermined time when the manual switch or IMS switch is turned on and the seat or the electric column is moved by the motor drive In the first step of determining whether the motor is restrained according to the presence or absence of input change, and if there is no input change of the sensor for the predetermined time, it is determined as the restraint of the motor, and the first restraint after applying power is the physical limit position. and a third step of setting a logical limit position, which is a memory reproducing section, at an inner position by the number of limit recognition pulses which is a determination factor for reaching the highest position or the lowest position than the set physical limit position. After the physical and logical limit positions have been set, the physical limit positions set during manual movement by the manual switch The fourth step of updating the physical limit position at the time of motor restraint and updating the logical limit position in the position within the limit recognition pulse number more than the physical limit position, and the regeneration movement by the IMS switch after the physical and logical limit positions are set. And a fifth step of updating the logical limit position when the motor is restrained before reaching the set logical limit position.

Hereinafter, the configuration and operation of the present invention will be described with reference to the accompanying drawings.

2 is a block diagram of an IMS according to the present invention, in which the limit switches 60 and 90 are deleted from the block diagram of the conventional IMS, and the same reference numerals are given to the same components.

As shown, IMS switch 10, driver door module 20, seat control unit 30, seat manual switch 40, seat motor 50, seat sensor 50a, electric column as shown Since the control unit 70, the electric column manual switch 80, the electric column motor 90, and the electric column sensor 90a are configured and each function and action have been described in the related art, the description thereof will be omitted here.

3 is a flowchart of a limit position setting and updating method according to the present invention.

When the driver switch of the manual switch 40 or 80 or the IMS switch 10 is turned ON and input (S302), the control unit 30 or 70 drives the motors 50 and 90 (S304).

For example, when the slide forward switch 42a of the manual switch 40 of the seat is ON, the slide motor 52 is output in the forward direction so that the seat is slid forward.

If there is no input change of the sensors 50a and 90a in the motor 50 and 90 for a predetermined time, it is determined as a restraint (S306). After the power is applied, the first restraint is unconditionally set to a physical limit position (S308). ).

The determination of the constraint is a case where a sensor input (pulse) is generated within the limit recognition pulse number during the limit recognition time.

For example, if the limit recognition time is 600 ms and the number of limit recognition pulses is 3 pulses, the point is set as the physical limit position when the pulse is input within 3 pulses for 600 ms.

In FIG. 6A, if the number of pulses (limit recognition pulse number: second control factor) generated during the limit time (first control factor) that is the motor restraint time is less than or equal to the predetermined number of pulses, the limit position is determined.

The limit recognition pulse number is a determination factor for reaching the highest position or the lowest position, and the first constraint in the forward / backward direction is a physical limit position, which is updated when the physical limit position is changed, and a logical limit position. Use as a reference for setting

In FIG. 5A, the logical limit position is used as a reference for the highest / lowest position in the memory regeneration operation by pressing the IMS switch 10, and the logical limit position section (B section) becomes an operation section during the memory regeneration operation.

On the other hand, the physical limit position is used as a reference for the highest / lowest position during manual operation by pressing the manual switches 40 and 80, and the physical limit position section (A section) becomes an operation section during manual operation.

The second control factor, the limit recognition pulse number, is a factor that determines how far from the molten limit position the logical limit position, which is the highest / lowest position, is a logical limit position = physical limit position-limit recognition pulse number. .

In manual operation, it moves to the physical limit position even if it passes the logical limit position.

Subsequently, when the physical limit position is set in FIG. 3, the logical limit position is automatically set at a position inward as much as the number of limit recognition pulses (S310).

As described above, the logical limit position becomes a movement range during memory regeneration, and the physical limit position becomes a movement range during movement by manual switch input. The limit positions differ depending on the movement method.

In this way, after all the limits are set (S312), the manual operation stops when the physical limit position is reached, and the memory regeneration stops when the logical limit position is reached, thereby preventing motor restraint for all operations.

In addition, when all the limits are set, the physical limit position is updated at the time of restraint before reaching the limit (S316) during the movement by the manual switch (S314), and the logical limit position is automatically updated accordingly (S318).

In addition, only the logical limit position is updated (S320) at the time of restraint before reaching the limit (S320) during the movement (S314) by the memory regeneration, not the manual switch.

This is a way to update the logical limit position as the physical limit position is updated when the limit position is updated due to abnormal restraint, and the memory regeneration area is reduced for safety, and the driver moves to the manual switch and passes the abnormally issued restraint area. .

4A and 4B are detailed flowcharts of FIG. 3, which illustrate an example of the forward operation of the slide motor in the seat motor.

In FIG. 4A, when the slide motor makes a forward output, the seat control unit 30 first determines whether the forward output of the slide motor 52 is the first output (S402), and in the case of the first output, the maximum continuous operation time (T1). ) And the motor restraint time (or limit recognition time: T2) are cleared and the slide motor 52 is forwarded (S404).

If the forward output is not the first output, it is determined whether it is an IMS playback operation or a manual operation (S406). In the case of the IMS playback operation, it is determined whether a forward physical limit position is previously set (S408). When the forward physical limit position is previously set, it is determined whether the previously set forward physical limit position has been reached (S410).

When the previously set forward physical limit position is reached, the forward output of the slide motor is stopped and the condition flag is set because it is a physical limit position update condition (S412).

In the case of manual operation in step S406 or when the forward physical limit position is not previously set in step S408 or when the forward physical limit position that is preset in step S410 is not reached, the maximum continuous operation time T1. It is determined whether the elapsed time (S414).

When the maximum continuous operation time T1 has elapsed, the operation S412 is performed. When the maximum continuous operation time T1 has not elapsed, the number of sensor input pulses (forward slide position displacement) is determined as the number of abnormal sensor pulses. Compared with (MIN EDGE) (S416), when the sensor input pulse number is larger than the sensor error judgment pulse number, the motor stall time (or limit recognition time: T2) is cleared and the sensor error judgment flag is cleared because it is not a sensor error condition. (S418).

The number of sensor abnormality determination pulses (third control factor) is the current pulse number Pn and the past pulse numbers Pn-1, Pn-2, ..., Pn-i, as shown in FIGS. 6B and 6C. It is compared to determine whether the current position is normally moving in the direction according to the switch input (forward / backward).

Here, FIG. 6B shows normal movement and FIG. 6C shows abnormal movement.

In step S416, when the sensor input pulse number is less than the sensor abnormal determination pulse number, it is determined whether the limit recognition time T2 has elapsed (S420), and when the limit recognition time has not elapsed, it is determined whether the forward logical limit position has been reached. If the forward logical limit position is reached (S422), the logical limit position is updated (S424).

In other words, if the logical limit position is reached during the motor operation by the manual switch and then moved further from this position, the logical limit position is updated.

When the limit recognition time T2 has elapsed in step S420, it is determined whether the regeneration operation is performed once again (S426). If the regeneration operation is performed, the forward output of the slide motor 52 is stopped (S428).

Next, referring to FIG. 4B, the physical limit position setting and updating order are determined. In the case where the forward physical limit position is not previously set, it is determined whether the forward (moving direction) physical limit position is previously set (S430). In step S432, it is determined whether the previously set backward (move opposite direction) physical limit position is preset.

When the forward physical limit position is previously set, it is determined whether the sensor error condition (S434) and the forward physical limit position update condition are present (S436).

In FIG. 5B, the motor is constrained in the section (D section) of adding or subtracting the number of reproduction position tolerance pulses C, which is the fourth control factor, to the section B, which is the logical limit position section, that is, in the region where the tolerance difference differs from the memory reproducing region. The time is determined as a sensor error condition, and when the motor is restrained in the E section other than the D section, the time is determined as a physical limit update condition.

In FIG. 6D, the play position tolerance pulse number Diff is a factor that determines whether the motor stops by comparing the current position with the position stored in the memory. How exactly does the play position tolerance pulse stop at the position stored in the memory? It can be seen.

Memory position when the playback position tolerance pulse number is 8-If the current position is within 8, it stops.

In the case of the sensor error condition again in FIG. 4B, it is determined as a sensor error and a warning sound is generated (S438).

If the physical limit position update condition is not satisfied in step S434, the current slide position is compared with the existing forward physical limit position (S440). If the current slide position is ahead of the existing forward physical limit position, the current position is forward physical limit position. (S442) and set the forward logical limit position accordingly (S444).

If the current slide position is behind the forward physical limit position in step S440, it is determined as a sensor error and a warning sound is generated (S438).

If the backward physical limit position is previously set in step S432, the current slide position is compared with the existing backward physical limit position (S446).

If the current slide position is ahead of the existing backward physical limit position, the current position is set as a forward physical limit position (S448), and accordingly, a forward logical limit position is set (S450).

In the case of the physical limit update condition in step S436, the forward physical limit position is updated (S452), and accordingly, the forward logical limit position is updated (S454).

If the forward physical limit position is not set in step S432, the forward physical update condition flag is cleared (S456), and finally, the forward output of the slide motor is stopped (S458).

In the above, the case of the slide forward operation has been described by way of example, but the case of the slide forward operation is the same as that of the other motor.

As described above, DFSS (Design For Six Sigma) technique is applied to derive limit optimization pulse, limit recognition time, sensor abnormality determination pulse number, and playback position tolerance pulse number as optimal control factors to implement system optimization.

As described above, according to the present invention, the limit setting and updating is possible even when the motor is driven by the manual switch and the control factor is set and optimized using the DFSS technique to simplify the system by eliminating the limit switch and its circuit. It can save cost and prevent mechanical stop sound.

Claims (5)

A first step of determining whether the motor is restrained according to the presence or absence of an input change of a sensor provided in the motor for a predetermined time when the manual switch or the IMS switch is turned on and the seat or the electric column are moved by driving the motor; A second step of determining as a restraint of the motor when there is no input change of the sensor for the predetermined time, and setting the first restraint to a physical limit position after applying power; A third step of setting a logical limit position, which is a memory reproducing section, at an inner position by the number of limit recognition pulses which is a determination factor of reaching the highest position or the lowest position than the set physical limit position; After the physical and logical limit positions are set, the physical limit position is updated when the motor is locked before reaching the set physical limit position during manual movement by the manual switch, and the logical limit position is positioned inside the physical limit position by the number of limit recognition pulses. A fourth step of updating; And And a fifth step of updating the logical limit position when the motor is restrained after the physical and logical limit positions are set and before the logical limit position is reached during the regeneration movement by the IMS switch. The method of claim 1, In the fourth step, if the physical limit position for the movement direction is set in advance, the sensor error condition is determined, and if it is not the sensor error condition, the movement direction physical limit position update condition is determined, and the movement direction physical limit position update condition is not. In this case, comparing the current moving position with the physical limit position in the moving direction, and setting the current moving position as the physical limit position in the moving direction when the current moving position is ahead of the physical limit position in the moving direction. How to set and update the limit position of the IMS. The method of claim 2, When the physical limit position with respect to the movement direction is not preset and the physical limit position with respect to the movement opposite direction is preset, the current movement position is compared with the physical limit position with respect to the movement opposite direction. If is located in front of the physical limit position relative to the movement direction, the limit position setting and updating method of the IMS, characterized in that to set the current movement position to the physical limit position relative to the movement direction. The method of claim 2, The sensor error is a limit position setting and updating method of the IMS, characterized in that it is determined that the sensor error when restraining the motor in the region where the difference between the play position tolerance pulse number or more in the logical limit position interval. The method according to claim 2 or 4, The movement direction physical limit position update is a limit position setting and updating method of an IMS, characterized in that it is determined as an update condition when the motor is restrained in an area within a number of playing position tolerance pulses in a logical limit position section.

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