KR20040049373A - Moter control method for adjusting seat height - Google Patents

Abstract

PURPOSE: A motor control method for adjusting height of a seat in a vehicle is provided to improve the reliability by counting pulse accurately with using hall IC sensors, and to reduce position errors by updating the limit point in moving the motor beyond the memorized limit point with deciding the reference position with the initial installation position. CONSTITUTION: A memory power system comprises a control unit(10) connected to switches and motors(11-14), and the motor uses two hall IC sensors. The initial installation position is used as the reference position, and the height is stored by memorizing the position with the pulse number of positive moving direction from the reference position through the control unit. The position error is decreased by updating the limit point in moving the motor beyond both end limit points memorized in the control unit. Maximum continuous operation time of manual operation connected to the control unit is 10 seconds regardless of restraint.

Description

MOTOR CONTROL METHOD FOR ADJUSTING SEAT HEIGHT}

The present invention relates to a motor control method for seat height adjustment of a vehicle, and more particularly, to a motor control method for seat height adjustment of a pair of Hall IC sensors that does not require a memory initialization process in a memory power seat system.

For example, an auxiliary device for the driver's convenience in a vehicle may be a memory power seat that automatically adjusts the seat position so that people who have different physical conditions may drive in the best condition every time they use the vehicle. Can be.

The fundamental purpose of adjusting the position of the seat is to allow people to drive in a comfortable position at the most suitable position according to the height of the driver, since the height and sitting posture of people are usually different, further to contribute to safe driving.

In the prior art, two rails are fixed to the bottom of the vehicle in parallel, a seat is installed on the rail, and then the lever can be manually moved forward or backward on the two rails by lever operation. It is a device to manually adjust the movement of the sheet. That is, the seat locked on the rail is released by pulling up the operation lever or pressing the operation lever, and the seat is locked again on the rail when the operation lever is restored to its original position by the spring restoring force.

Another conventional technique is to introduce a memory power device that automatically controls the position of the car seat, which uses a seat installed in the interior of the vehicle using at least three motors to adjust the position of the seat to the driver's body shape. It is designed to adjust accordingly. Here, the three motors are a front up and down adjustment motor for adjusting the front of the seat up and down, a rear up and down adjustment motor for adjusting the rear portion of the seat up and down, and a seatback motor for adjusting the angle of the seat back.

The three motors must have at least eight switches to control the memory power seat.

These multiple switches are each connected to the input port of the power control unit that controls the three motors for adjusting the memory power seat.

However, in the case of a general vehicle equipped with a memory power seat for appropriately adjusting the position of a seat of a vehicle, since there is no limit switch, a limit of one end is recognized through a process called memory initialization.

In other words, when the memory is initialized, the sheet moves to the slide max back, the recline max back, and the front / rear height max down. Memory and playback are performed as a reference.

However, even when the memory is initialized by other obstacles to reach the actual limit point, there is a problem in that the restraint point is recognized as a limit and cannot be deviated from the point.

In addition, when a battery reset occurs due to battery replacement or the like, when memory initialization is not performed, an incorrect position is stored or reproduced.

That is, since the position value once recognized as a limit does not change, the memory does not go to the actual end, but moves only to the position recognized as a limit. do. In this case, there is a disadvantage in that a location memory error does not occur to find an accurate position during playback.

On the other hand, the sensor in the memory power device is a part that indicates the position change by detecting the motor rotation is embedded for each motor, using a Hall IC sensor and a potentiometer (POTENTIOMETER). However, when the variable resistor is used, the accuracy is lowered, and in the case of the Hall IC sensor, there is a difficulty in limit recognition. Therefore, the conventional system does not solve this difficulty.

Therefore, the present invention has been invented to solve the above disadvantages, using the up-and-down Hall IC sensor of the up-sensor having a phase difference of 90 degrees, the up-direction moving start sensor is 90 degrees ahead of the phase down and down sensor when moving in the down direction Is 90 degrees out of phase. This enables accurate pulse counters and increases the reliability of position recognition. In addition, it provides a motor control method for seat height adjustment of a memory power seat system that not only sets the initial mounting position as a reference position but also updates the limit point to reduce the position error when a motor movement occurs beyond the stored both end points. There is a purpose.

1 is a configuration diagram of a memory power seat system for explaining a seat height motor control method according to an embodiment of the present invention;

2 is a schematic view showing the moving direction of the vehicle seat.

<Description of the symbols for the main parts of the drawings>

1-8: various switches

10: control unit

11-14: Various motors

The present invention for achieving the above object, in the memory power sheet system consisting of a control unit connected to a variety of switches and motors (M), using two Hall IC sensors in each motor, the initial mounting position to the reference position In case of height, the control unit moves in the up or down direction from the reference position, and when the restraint point is generated, the position is stored as a limit point. However, a limit update is necessary because it can be remembered as a limit even if a motor restraint occurs at a point other than the actual end due to an obstacle.

If motor movement occurs outside the stored both end points from the control unit, the limit point is updated, and if the motor restraints occur in the ankle more than the stored both end points, the motor is not recognized as a limit point and processed as a motor restraint. In this way, it is possible to hold the exact limit position without a limit switch, thereby reducing the position memory playback position error.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a memory power seat system for explaining a seat height motor control method according to an embodiment of the present invention, the present invention is a control in which various switches (1-8) and the motor (M: 11-14) is connected; In the memory power sheet system including the unit 10, the seat height motor control method using a pair of hall IC sensors, which does not require the memory initialization process of the control unit 10, is required.

The control unit 10 receives all the switches 1-8 or sensor inputs to control the driving motors 11-14. First, as the memory button, the switches 1 to 4 are the regeneration switches 1 and 2, the memory switch 3 and the automatic switch 4, and the memory switch 3 is used to store the current position of the sheet. It is a button, and the regeneration switch (1, 2) is a memory regeneration button for moving to a seat position previously stored by the user, and the automatic switch 4 is a button for the getting on and off interlocking function.

As the switch module, the remaining switches 5-8 are a slide switch 5, a recline switch 6, a front height switch 7 and a rear height switch 8. Here, the slide switch 5 and the recline switch 6 are the forward switch FWD and the back switch BACK, and the front height switch 7 and the rear height switch 8 are the up switch UP and the down switch. (DOWN).

The drive motors 11-14 driven by the corresponding switches of the switch module switches 5-8 are the front height motor 11, the rear height motor 12, the slide motor 14, and the recline motor 13. These motors (M) have a built-in sensor for detecting the amount of position change therein. The sensor detects the corresponding motor rotation and is built into each motor to indicate a change in position, and transmits a sensor signal to the control unit 10.

FIG. 2 shows a moving direction of the vehicle seat, in which, A represents a front height direction, B represents a rear height direction, C represents a slide direction, and D represents a recline direction and the like.

The motor seats are provided with driving motors 11-14, respectively, so that the driving motors 11-14 are moved from the control unit 10 in the corresponding direction by the operation of the switches 5-8 of the switch module. It is. In this case, the control unit 10 senses sensor signals respectively built in the driving motors 11-14.

Referring to the seat height motor control method of the present invention configured as described above in detail with reference to Figs. 1 and 2, the present invention does not require a memory initialization process in the control unit 10, unlike the conventional system.

That is, the initial mounting position is used as the reference position. For example, in the case of the height, the position is stored in the memory to move 50 pulses in the up direction and 100 pulses in the down direction from the reference position. To do this, two Hall IC sensors with accurate pulse counts are used.

Since the two Hall IC sensors are composed of an up sensor and a down sensor, and the two Hall IC sensors have a phase difference of 90 degrees, the up sensor has a 90 degree phase in the up direction movement, and the down sensor has a down angle. The phase is 90 degrees ahead.

In addition, when the motor M is moved out of the limit points stored at both ends from the control unit 10, the limit points can be updated to reduce the position error. The two Hall IC sensors may be configured as a forward sensor and a back sensor.

On the other hand, when the seat position is stored, the memory switch 3 is pressed and then the regeneration switch 1 or the regeneration switch 2 is pressed to enter the control unit 10.

During regeneration, pressing the regeneration switch 1 or regeneration switch 2 moves to the position stored in the regeneration switch. The two Hall IC sensors embedded in the drive motors 11-14 consist of an up sensor and a down sensor in the front height motor 11 and the rear height motor 12, and the slide motor 14 and the recline motor. In (13), it consists of a forward sensor and a back sensor.

The manual operation connected to the control unit 10 has a maximum continuous operation time of 10 seconds, and manual operation is possible regardless of whether it is restrained or not.

The memory regeneration operation in which the regeneration switch 1 or the regeneration switch 2 is pressed has a maximum continuous operation time of 10 seconds. Playback operation is possible regardless of the position.

The restraint detection of the control unit 10 checks the restraint during the manual operation or the regeneration operation and recognizes the restraint when the position change amount is less than 5 pulses / 2 seconds (= 10 edge / 2 seconds), and the restraint position at the time of the first restraint. Recognize as a limit position (regardless of direction).

Detects the limit in one direction and then detects the limit in the opposite direction.The condition is that at least 5 pulses (10 edges) are generated after the switch is turned on and the pulse is separated from the opposite limit position by more than 50 pulses (100 edges). This is the case.

Update the limit position immediately from the moment it passes the existing limit position, and after the switch is turned on, if the pulse is generated more than 5 pulses (10 edges) and separated from the opposite limit position more than 50 pulses (100 edges) Update.

Therefore, when the limit is less than 5 pulses (10 edges) below the existing limit position, the limit position is updated at the same time as the error is detected (however, only the error is detected without the limit update when the limit value is less than 50 pulses).

The error detection is possible only after the limit position is detected, and the error is detected when restrained by 5 pulses (10 edges) or more below the existing limit position, and is separated from the opposite limit position by 50 pulses (100 edges) or more. Error detected at restraint.

Therefore, the seat height motor control method of the memory power seat system of the present invention enables not only precise control without position error but also cost reduction without limit switch.

As described above, according to the motor control method for adjusting the seat height of the vehicle according to the present invention, the initial mounting position as the reference position as an accurate pulse count using the forward IC and the back IC or the Hall IC sensor of the up and down sensors In addition, it is advantageous to provide a useful method for controlling the seat height motor of a memory power seat system that can reduce the position error by updating the limit point when the motor movement occurs outside the stored both end points.

Claims (4)

In the memory power sheet system consisting of a control unit connected to various switches and motors (M), In each motor, two Hall IC sensors are used, and the initial mounting position is used as the reference position. In the case of height, the control unit stores the position in the form of direction + number of movement pulses from the reference position, for example, 50 in the up direction. The position is memorized by pulse movement, 100 pulse movements in the down direction, and the like; The motor control method for controlling the seat height of a vehicle, characterized in that the position error is reduced by updating the limit point when the motor movement occurs outside the limit points stored at both ends from the control unit. The motor control method according to claim 1, wherein the manual operation connected to the control unit has a maximum continuous operation time of 10 seconds and is capable of manual operation regardless of restraint. The memory reproducing operation in which the regeneration switch is pressed has a maximum continuous operation time of 10 seconds, and is terminated when it is constrained during the reproducing operation. The reproducing ends when the target position is reached during the reproducing operation. Motor control method for seat height adjustment of a vehicle, characterized in that the reproducing operation is possible regardless. 4. The restraint detection according to any one of claims 1 to 3, wherein the restraint detection of the control unit checks whether restraint is performed during the manual operation or the regeneration operation, and recognizes the restraint when the position change amount is less than 5 pulses / second. Recognition of the restraint position as a limit position irrespective of the direction, and the update of the limit position is updated immediately from the moment passing through the existing limit position, the error detection is possible only after the limit position is detected Motor control method.