JP2014061735A - Control system for vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control system for a vehicle seat which can perform storage and reproduction control of an accurate seat position even after using a memory seat many times over a long period of time.SOLUTION: A vehicle seat control system 10, which stores and reproduces a user designation position of a vehicle seat, comprises: a drive part 4 which operates a vehicle seat 2; an operation part 3 which receives user operation; and a control device 5 which includes relative position control means receiving a signal generated by first user operation to perform relative position control for storing or reproducing a user designation position with reference to a current position of a vehicle seat, and absolute position control means receiving a signal generated by second user operation to perform absolute position control for storing or reproducing a user designation position by operating the drive part 4 with reference to the operation end of the vehicle seat 2.

Description

  The present invention relates to a vehicle seat control system, and more particularly to a vehicle seat control system in a memory seat.

  Conventionally, a so-called memory seat in which a vehicle seat is motor-driven to a storage position is known. In such a memory sheet, it is an important issue to store and reproduce the accurate position of the sheet. For example, Patent Document 1 discloses that in an electric seat apparatus, a deviation occurs between the actual sheet position and the sheet position stored in the apparatus by driving the motor after the sheet reaches the operating end and is locked. Disclose as a problem. The document discloses that the sheet storage position is corrected in accordance with the amount of motor drive after locking in order to suppress this shift.

  Further, Patent Document 2 includes a sensor that outputs a pulse that is synchronized with the rotation of the motor in the electric seat device, and detects and stores the state of the sheet by counting the pulses that are output along with the rotation of the motor. A configuration is disclosed in which driving of the motor is continued until the change direction of the state is determined. This document discloses that the sheet storage position can be corrected based on the pulse from the sensor even if the motor is rotated backward after the motor driving is stopped by the above configuration.

  Further, in Patent Document 3, in the case where the driving state of the motor is detected by a ripple pulse shaping circuit that outputs a signal synchronized with the motor rotation in the memory sheet, the motor rotates by inertial force after the power supply to the motor is stopped. It is disclosed as a problem that a deviation occurs between the sheet stop position stored in the control device and the actual sheet position. And in this document, in order to eliminate this deviation, the amount of rotation of the motor due to inertia after the power supply to the motor is stopped is stored as a correction amount, and the sheet is based on the sheet position and the correction amount when the power supply is stopped. The structure which detects the exact position of is disclosed.

JP 2001-277909 A JP 2011-42280 A JP 2000-250629 A

  However, although correction of the sheet storage position disclosed in Patent Documents 1 and 2 can bring the sheet storage position closer to the actual sheet position, it is still stored or reproduced as the actual sheet position. A slight deviation from the sheet position is inevitable. Such a slight deviation does not cause a problem in the short term, but if the seat is operated many times in the long term, the deviation accumulates and appears as an unacceptable deviation for the user. was there.

  Further, in the correction control disclosed in Patent Document 3, the aging of the motor is not taken into consideration in the selection of the correction amount. The distance that the motor rotates due to inertia and the sheet moves with the inertia changes due to aging of the motor, the sheet, and the like. That is, the inertial rotation amount of the motor and the inertial movement amount of the seat are different between the initial use time of the vehicle and the subsequent use time. Therefore, there is a problem that the correction amount at the initial stage of vehicle use is not an appropriate correction amount in subsequent use, and as a result, accurate correction control cannot be performed.

  Therefore, an object of the present invention is to provide a vehicle seat control system that can perform accurate seat position storage and reproduction control even when a memory seat is used many times in the long term.

  A vehicle seat control system for storing and reproducing a user-specified position of a vehicle seat according to the present invention is generated by a drive unit that operates a vehicle seat, an operation unit that receives a user operation, and a first user operation. By receiving the signal, the relative position control means for executing the relative position control for storing or reproducing the user specified position with reference to the current position of the vehicle seat, and the signal generated by the second user operation, A control device having absolute position control means for performing absolute position control for operating or driving the drive unit based on the position of the operating end and storing or reproducing the user-specified position after moving the vehicle seat to the operating end. .

  According to the above configuration, while it is possible to select simple relative position control as a normal operation, absolute position control with high position control accuracy can be selected according to the user's intention. Therefore, the usability of the memory sheet from the short-term and long-term viewpoints is improved.

  Here, the second user operation is configured to require a longer operation time or a larger number of operation steps than the first user operation.

  According to the above configuration, the operation of absolute position control, which is assumed to be relatively infrequently used, is more complicated than the operation of relative position control, which is expected to be relatively high in use frequency. An operation mode that more reflects the intention of (relative position control) and the intention of special use (absolute position control) can be realized.

  Further, when the absolute position control means stores the user specified position, the user specified position specified by the difference between the positions of the vehicle seat before and after the vehicle seat is moved to the operating end is stored.

  According to the above configuration, while making it possible to select simple relative position storage control as normal storage control, absolute position storage control with high position storage accuracy can be selected according to the user's intention. Therefore, it is possible for the user to ensure the simplicity and accuracy of the memory sheet position storage control.

  Further, when the absolute position control means reproduces the user designated position, the vehicle seat is moved based on the user designated position, starting from the operating end of the vehicle seat.

  According to the above configuration, while making it possible to select simple relative position reproduction control as normal reproduction control, absolute position reproduction control with high position reproduction accuracy can be selected according to the user's intention. Therefore, it is possible for the user to ensure the simplicity and accuracy of the memory sheet reproduction control.

In addition, the first user operation is specified when the predetermined switch pressing time of the user operation unit is less than the threshold value, and the second user operation is specified when the predetermined switch pressing time is equal to or greater than the threshold value. Is done.

  According to the above configuration, the relative position control or the absolute position control can be selected depending on whether or not the button is pressed without changing the button configuration of the operation unit generally installed in the memory sheet. The operability, versatility, and low cost of the memory sheet can be ensured.

  Still further, the drive unit includes a motor, and the control device is configured to stop the drive signal to the motor when the vehicle seat reaches a position a predetermined distance from the user-specified position, and the predetermined distance is an accumulation of the motor. It is comprised so that it may correct | amend according to usage-amount.

  According to the above configuration, since the inertial movement amount of the seat can be appropriately corrected according to the deterioration over time, high-accuracy position control is ensured even when the user uses the vehicle for many years.

  Here, the cumulative usage amount of the motor can be the cumulative number of times of regeneration that the control device has driven the motor. Further, the predetermined distance is configured to increase with respect to the accumulated usage amount of the motor.

  According to the above configuration, the process for determining the correction amount is appropriate, and accurate inertia correction control of the sheet can be obtained with a simple configuration.

  According to the vehicle seat control system of the present invention, it is possible to perform accurate seat position storage and reproduction control even if the memory seat is used many times in the long term.

1 is a schematic view illustrating a memory sheet according to an embodiment of the present invention. 1 is a block diagram of a vehicle seat control system according to an embodiment of the present invention. It is a flowchart which shows the memory | storage control in the vehicle seat control system by the Example of this invention. It is a flowchart which shows the reproduction | regeneration control in the vehicle seat control system by the Example of this invention. It is a figure explaining the modification of the memory | storage control and reproduction | regeneration control of FIG.3 and FIG.4. It is a figure explaining the other modification of the storage control of FIG.3 and FIG.4, and reproduction | regeneration control. It is a flowchart which shows inertia correction control in the vehicle seat control system by the Example of this invention. It is a figure explaining the inertia correction control in the vehicle seat control system by the Example of this invention.

  FIG. 1 is a schematic view showing a memory seat 1 equipped with a vehicle seat control system of the present invention, and FIG. 2 is a block diagram of a vehicle seat control system 10 (hereinafter referred to as “control system 10”) of the present invention. is there. In the present embodiment, as the memory seat 1, a configuration in which a vehicle seat is slid in the vehicle front-rear direction is illustrated.

  As shown in FIG. 1, the memory seat 1 includes a vehicle seat 2 (hereinafter referred to as “seat 2”), an operation unit 3, a drive unit 4, a control device 5, and a rail 6. The operation unit 3 includes a switch 30 (SET button), a switch 31 (M1 button), and a switch 32 (M2 button) provided on the door armrest for the seat 2, and receives a user operation. The control device 5 outputs a drive signal to the drive unit 4 in response to an input from a user operation. The seat 2 slides on the rail 6 by the power of the drive unit 4.

  As shown in FIG. 2, the drive unit 4 includes a slide motor 40 (hereinafter referred to as “motor 40”), a ripple detection circuit 41, and a resistor 42. The ripple detection circuit 41 detects a ripple component included in the load current of the motor 40. Specifically, the load current of the motor 40 flows through the resistor 42, and the voltage generated at the resistor 42 is input to the ripple detection circuit 41. The ripple detection circuit 41 outputs signals having different logical values depending on whether the input voltage is equal to or higher than the threshold and lower than the threshold. Therefore, the ripple detection circuit 41 outputs a rectangular wave voltage that is inverted at the ripple frequency of the load current of the motor 40. In the following description, it is assumed that the operation amount (that is, the rotation amount) of the motor 40 and the operation amount (that is, the movement distance) of the seat 2 are proportional to each other. It is assumed that the CPU 50 can convert appropriately.

  As shown in FIG. 2, the control device 5 includes a CPU 50, an input interface (I / F) 51, a memory 52, a timer 53, a current position storage unit 54, a designated position storage unit 55, a reproduction count storage unit 56, and a correction formula. A storage unit 57 is provided. The CPU 50 is a processor that controls the exchange of signals between the units, and the memory 52 is a memory that stores programs and data. For convenience of explanation, the current position storage unit 54, the specified position storage unit 55, the reproduction count storage unit 56, and the correction formula storage unit 57 are separate from the memory 52, but these storage units are stored in the memory 52. It may be included.

  The input interface 51 converts a signal from the operation unit 3 into a voltage signal that can be input to the CPU 50, and inputs the voltage signal to the CPU 50. When the user presses the SET button, the switch 30 is closed, and a press signal (SET signal) for the switch 30 is input to the CPU 50 via the input interface 51. Similarly, when the user presses the M1 button or the M2 button, the switch 31 or the switch 32 is closed, and the switch 50 press signal (M1 signal) or the switch 32 press signal (M2 signal) is sent to the CPU 50 via the input interface 51. ) Is entered. In the following description, since the switch 31 and the switch 32 have the same configuration and function, only the operation relating to the switch 31 will be described, and the operation relating to the switch 32 will be omitted. .

  The current position storage unit 54 sequentially stores the current position of the sheet 2 specified by the CPU 50. The CPU 50 calculates and specifies the current position of the sheet 2 from the initial position of the sheet 2 and the movement distance of the sheet 2 for each reproduction control, and stores the specified current position in the current position storage unit 54. For example, when the current position before the drive signal output is Xc1, the distance corresponding to the drive input signal is Xd, the correction amount is Xi, and the current position after the drive signal output is Xc2, Xc2 = Xc1 + Xd + Xi.

  The designated position storage unit 55 stores a user designated position Xu that is a sheet position designated by the user. The user designated position Xu is stored as the displacement of the seat 2 from the state where the seat is at the operating end (for example, slide rear most), and is not changed unless the designation change by the user or the absolute position storage control described later is performed.

  When the M1 signal is input after the SET signal, the CPU 50 executes storage control for specifying the user-specified position and storing it in the specified position storage unit 55. In addition, when the M1 signal is input without inputting the SET signal, the CPU 50 executes reproduction control for moving the seat 2 to the user specified position stored in the specified position storage unit 55. Details of the storage operation and the reproduction operation will be described later.

  The reproduction number storage unit 56 stores the cumulative number of reproduction control of the sheet 2. For example, every time the CPU 50 outputs a drive signal to the motor 40, the CPU 50 increments the count value in the reproduction number storage unit 56. The correction formula storage unit 57 stores a correction formula for calculating the correction amount Xi. In this embodiment, the CPU 50 selects from the correction formula storage unit 57 a correction formula corresponding to the cumulative number of playbacks stored in the playback number storage unit 56.

  The motor 40 rotates by inertia even after the drive input signal ends and the load current stops flowing, and then stops. During the reproducing operation, the CPU 50 sequentially identifies the current position of the sheet 2 and stops the drive input signal when the sheet 2 reaches a position before the position specified by the user by the inertial movement distance (correction amount) Xi. Thereby, after the motor 40 rotates by inertia, the sheet | seat 2 stops in a user designated position. The inertial movement amount of the seat 2 changes mainly due to aging deterioration of the motor 40 and also changes due to other factors such as aging of friction between the seat 2 and the rail 6. Therefore, the CPU 50 calculates the inertial movement distance Xi of the sheet 2 based on the correction formula selected according to the cumulative number of reproductions. Details of this inertia control will be described later.

Regarding the above storage control and reproduction control, the CPU 50 has a relative position control means for performing relative position control and an absolute position control means for performing absolute position control.
The relative position control is control for storing or reproducing the user-specified position with reference to the current position of the sheet 2 stored in the current position storage unit 54. The relative position control includes relative position storage control and relative position reproduction control, and the configuration in the control device 5 that performs these controls is collectively referred to as relative position control means.
The absolute position control is control for operating or storing the user-specified position by operating the motor 40 with reference to the position of the operating end of the seat 2 (in this embodiment, slide rear most). The absolute position control includes absolute position storage control and absolute position reproduction control, and the configuration in the control device 5 that performs these controls is collectively referred to as absolute position control means.

In the relative position storage control, the CPU 50 stores the current position stored in the current position storage unit 54 in the specified position storage unit 55 as the user specified position.
For example, if the current position stored in the current position storage unit 54 is the value “500”, the value “500” is stored in the specified position storage unit 55 as the user-specified position.

On the other hand, in the absolute position storage control, the seat 2 is moved to the operating end, and the user-specified position to be stored is specified from the difference in the sheet position before and after the movement to the operating end. More specifically, first, the CPU 50 temporarily stores the current position stored in the current position storage unit 54 in the memory 52, and moves the seat 2 to the operating end (slide rear most). Then, the CPU 50 specifies the user-specified position from the difference between the position stored in the memory 52 and the current position stored in the current position storage unit 54 at the operating end, and stores this in the specified position storage unit 55. .
For example, if the position stored in the memory 52 is the value “500” and the current position stored in the current position storage unit 54 when the seat 2 is at the operating end is the value “20”, the user-specified position The difference value “480” is stored in the designated position storage unit 55. In other words, the value “20” generated as the accumulation of deviation is reset by the absolute position storage control.

In the relative position reproduction control, the user-specified position is reproduced starting from the current position stored in the current position storage unit 54. Specifically, the CPU 50 calculates the difference between the current position stored in the current position storage unit 54 and the user specified position stored in the specified position storage unit 55, and operates the motor 40 based on the difference. The amount is determined and the sheet 2 is moved.
For example, if the current position stored in the current position storage unit 54 is a value “400” and the user-specified position stored in the specified position storage unit 55 is a value “500”, the difference value “100” ", The sheet 2 is moved.

On the other hand, in the absolute position reproduction control, reproduction of the user-specified position is performed starting from the operating end of the seat 2. Specifically, first, the CPU 50 moves the seat 2 to the operating end. Then, the CPU 50 moves the seat 2 by determining the operation amount of the motor 40 based on the user specified position stored in the specified position storage unit 55, starting from the operation end. Note that when the seat 2 is moved to the operating end, the current position stored in the current position storage unit 54 is reset.
For example, if the user designated position stored in the designated position storage unit 55 is a value “500”, the seat 2 is moved from the operating end by a value “500”. When the seat 2 is moved to the operating end, the value of the current position stored in the current position storage unit 54 is reset to “0” (regardless of the value). By this absolute position reproduction control, the sheet 2 is moved to an accurate position, and the stored accumulation of deviation is reset.

  As described above, the relative position storage control does not involve the operation of the seat 2, and the relative position reproduction control only involves the operation between the current position of the seat 2 and the user-specified position. On the other hand, the absolute position storage control and the absolute position reproduction control both involve movement to the working end of the seat 2. Therefore, relative position control (relative position storage control and relative position reproduction control) basically takes less time from the start to completion of control than absolute position control (absolute position storage control and absolute position reproduction control). On the other hand, since the absolute position control is based on the position of the working end of the seat 2, the position control accuracy is high. The present invention is configured so that relative position control or absolute position control can be selected in accordance with the user's intention in consideration of such features of relative position control and absolute position control.

<Memory control>
Next, storage control in the control system 10 will be described. FIG. 3 is a flowchart showing the storage control process.
Assume that the switch 30 (SET button) is pressed in step S100, and the switch 31 (M1 button) is pressed in step S101. That is, the SET signal is input to the CPU 50 in step S100, and the M1 signal is input to the CPU 50 in step S101.

  In step S102, it is determined whether or not the pressing time of the switch 31 is equal to or longer than a first threshold value (for example, 150 ms). That is, when receiving the M1 signal, the CPU 50 starts the timer 53, measures the duration of the M1 signal, and compares the duration with the first threshold value. When the duration of the M1 signal is equal to or greater than the first threshold (step S102, YES), the process proceeds to step S104, and when the duration is less than the first threshold (step S102, NO), the process is performed. finish. The determination in step S102 determines whether the pressing of the M1 button is based on the user's intention or not according to the user's intention (for example, when the M1 button is touched by mistake). Is for. That is, if the duration of pressing the M1 button is less than 150 ms, the CPU 50 determines that the M1 signal is due to an erroneous operation by the user, and ends the process without performing control.

  In step S103, following step S102, it is determined whether or not the pressing time of the switch 31 is equal to or longer than a second threshold value (for example, 1000 ms). That is, the CPU 50 compares the duration of the M1 signal from when the M1 signal is received with the second threshold value. If the duration ends below the second threshold (step S103, NO), the process proceeds to step S104. If the duration of the M1 signal exceeds the second threshold (step S103, YES), the process proceeds to step S104. Proceed to step S105. That is, the determination in step S103 is for determining whether or not the user presses the M1 button is a long press.

  According to steps S102 and S103, if a press of the M1 button that is neither an erroneous operation nor a long press with a pressing time of 150 ms or more and less than 1000 ms is detected (hereinafter referred to as “normal pressing”), the relative position is detected after step S104. When storage control is performed and a long press of the M1 button is detected, absolute position storage control is performed in step S105 and subsequent steps.

  In step S104, the CPU 50 stores the current position stored in the current position storage unit 54 as a user specified position in the specified position storage unit 55, and the process ends.

In step S105, the CPU 50 temporarily stores the current position stored in the current position storage unit 54 in the memory 52, and moves the seat 2 to the operating end (slide rear most).
In step S <b> 106, the CPU 50 stores, in the specified position storage unit 55, the user specified position specified from the difference between the position stored in the memory 52 and the current position stored in the current position storage unit 54 at the operating end. The process ends. Note that a step of moving the sheet 2 to the stored user-specified position after step S106 may be included.

<Playback control>
Next, the reproduction control in the control system 10 will be described. FIG. 4 is a flowchart showing the reproduction control process.
In step S201, it is assumed that the switch 31 (M1 button) is pressed and the M1 signal is input to the CPU 50.

  In step S202, it is determined whether or not the pressing time of the switch 31 is equal to or longer than a first threshold value (for example, 150 ms). Step S202 is the same as step S102 in the storage control described above. In other words, when the M1 button pressing duration ends in less than 150 ms, the CPU 50 determines that the M1 signal is due to an erroneous operation by the user and terminates the process without performing control.

  In step S203, following step S202, it is determined whether or not the pressing time of the switch 31 is equal to or longer than a second threshold (for example, 1000 ms). Step S203 is the same as step S103 in the storage control described above. That is, in step S203, it is determined whether or not the user presses the M1 button is a long press, and if it is a normal press (NO in step S203), the process proceeds to step S204. In step S203, YES), the process proceeds to step S205.

  According to steps S202 and S203, when the normal pressing of the M1 button is detected, the relative position reproduction control is performed after step S204, and when the long press of the M1 button is detected, the processing is performed after step S205. Absolute position reproduction control is performed.

  In step S204, the CPU 50 calculates the difference between the current position stored in the current position storage unit 54 and the user-specified position stored in the specified position storage unit 55, and the operation amount of the motor 40 based on the difference. Is determined, the sheet 2 is moved, and the process ends.

In step S <b> 205, the CPU 50 moves the seat 2 to the operating end and resets the current position of the current position storage unit 54.
In step S <b> 206, the CPU 50 determines the operation amount of the motor 40 based on the user designated position stored in the designated position storage unit 55 starting from the operation end, moves the seat 2, and the process ends.

  In the storage control and the reproduction control in this embodiment, relative position control (relative position storage control, relative position reproduction control) and absolute position control (absolute position storage control, absolute position reproduction control) are performed according to the pressing time of the M1 button. Although the determination is made, the determination mode of the relative position control and the absolute position control is not limited to this.

  For example, the relative position control and the absolute position control may be determined by pressing the M1 button once and twice. Specifically, as shown in FIG. 5, whether or not the M1 button has been pressed again in step S150 after step S102 or S202 when it is determined that the pressing time of M1 is 150 ms or longer before the predetermined time has elapsed. Whether or not it may be detected. If the M1 button has not been pressed again (step S150, NO, step S151, YES), the process proceeds to step S104 or S204 of the relative position control, and if the M1 button has been pressed again, that is, if it has been pressed twice ( In step S150, YES), the process may proceed to step S105 or S205 of absolute position control.

  Further, the relative position control and the absolute position control may be determined based on whether or not the M1 button and another button (for example, the SET button) are double-pressed. For example, as shown in FIG. 6, whether or not the SET button is pressed together with the M1 button is detected in step S160 after the determination that the pressing time of M1 is 150 ms or longer in step S102 or S202. You may make it do. If only the M1 button is pressed after step S102 or S202 (step S160, NO), the process proceeds to step S104 or S204 of relative position control, and if the M1 button and the SET button are double pressed (step S160). YES), the process may proceed to step S105 or S205 of absolute position control.

  Thus, in the present invention, the absolute position control operation that is assumed to be executed at a relatively low frequency has a longer operation time or a larger number of operation steps than the relative position control that is assumed to be executed at a relatively high frequency. This is a complicated setting. Accordingly, a normal usage mode, that is, a usage mode in which the user performs relative position control on a daily basis, and a special usage mode, that is, the absolute position when the user notices or is concerned about the positional shift. The usage mode of performing control can be selected in an intuitive operation setting.

<Inertia correction control>
Next, inertia correction control in the control system 10 will be described with reference to FIGS. FIG. 7 is a flowchart showing the process of inertia correction control, and FIG. 6 is a timing chart explaining the inertia correction control.

  Referring to FIG. 7, in step S <b> 301, the CPU 50 receives a reproduction command from the operation unit 3 via the input interface 41. The regeneration command in this case is a command for relative position regeneration control by normal depression of the switch 31 (see steps S203 to S204 in FIG. 4).

  In step S302, the CPU 50 determines whether or not the cumulative number of reproductions stored in the reproduction number storage unit 56 has exceeded a threshold value (for example, 5000 times). If the cumulative number of reproductions is 5000 or less (step S302, NO), the process proceeds to step S303, and if it exceeds 5000 (step S302, YES), the process proceeds to step S304.

  In steps S303 and S304, the CPU 50 selects a correction formula for inertia correction control. Here, the correction equation for inertia correction control is an equation for predicting the amount of rotation of the motor due to inertia after the motor 40 stops. As described above, the inertial rotation amount of the motor 40 changes due to deterioration over time. More specifically, the inertial movement distance Xi increases monotonically with respect to the rotational speed R at the moment of stopping the motor 40 and increases with an increase in the cumulative number of operations of the motor 40. For example, when the correction formula is Xi = a × R + b (a and b are constants), the constants a and / or b may be values that increase depending on the cumulative number of operations of the motor 40. The correction formula is not limited to the above formula, and an optimal formula is selected with reference to experimental data and the like.

  As described above, in step S303, the CPU 50 selects, from the correction formula storage unit 57, the correction formula 1 corresponding to the case where the deterioration over time is small as the correction formula. On the other hand, in step S <b> 304, the CPU 50 selects, from the correction formula storage unit 57, the correction formula 2 corresponding to the case where aging has advanced as the correction formula. Of course, a plurality of threshold values may be provided for the cumulative number of reproductions, and the number of correction formulas may be three or more.

  In step S305, the CPU 50 outputs a drive input signal to the motor 40 to start the motor operation. That is, the CPU 50 calculates the operation amount of the motor 40 based on the difference between the current position stored in the current position storage unit 54 and the target position (for example, the user specified position stored in the specified position storage unit 55). Then, a drive input signal is output according to the operation amount.

  In step S306, the CPU 50 determines whether or not the sheet 2 has entered the target position within the predetermined distance Xa. When the seat 2 has not entered the predetermined range Xa up to the target position (step S306, NO), the CPU 50 continues to operate the motor 40 and enters the predetermined distance Xa to the target position (step S306, YES). The process proceeds to step S307.

  In step S307, the CPU 50 measures the rotational speed of the motor 40. For example, the CPU 50 can detect the rotational speed of the motor 40 from the frequency of the ripple signal input from the ripple detection circuit 41.

  In step S308, the CPU 50 calculates the inertial movement distance Xi by substituting the rotation speed measured in step S307 into the correction formula selected in step S303 or S304.

  In step S309, the CPU 50 determines whether or not the distance from the current position of the sheet 2 to the target position is the inertial movement distance Xi calculated in step S308. When the distance from the current position of the seat 2 to the target position is less than the inertial movement distance Xi (step S309, NO), the CPU 50 continues the operation of the motor 40.

  When the distance from the current position of the seat 2 to the target position becomes the inertial movement distance Xi (YES in step S309), the process proceeds to step S310, and the CPU 50 stops the drive input signal to the motor 40. Thereafter, the motor 40 operates by inertia, and the seat 2 moves by the inertia movement distance Xi calculated in step S308 and stops.

The inertia correction control will be described with reference to FIG.
At t0, the operation of the motor 40 is started in step S305.
When it is detected that the sheet 2 has entered the predetermined distance Xa of the target position at t1, the motor rotation speed is measured in step S307, and the inertial movement distance Xi of the sheet 2 is calculated in step S308.
At t2, it is detected that the seat 2 has reached the position of the inertial movement distance Xi to the target position, and the drive input signal from the CPU 50 to the motor 40 is stopped in step S310.
Thereafter, the rotation of the motor 40 stops while decelerating due to inertia, and the seat 2 also stops at t3 while decelerating accordingly.

  As described above, according to the control system of the present invention, the relative position (storage and reproduction) control that can be easily performed in a short time from the start to the completion of the control can be selected as the normal operation, but the position control accuracy is high. The absolute position (storage and reproduction) control can be selected according to the user's intention. Therefore, the usability of the memory sheet from the short-term and long-term viewpoints is improved. In particular, the present invention is more advantageous when the seat position is frequently stored and reproduced, such as when a plurality of users use a vehicle.

  Furthermore, in the control system of the present invention, the operation of absolute position control, which is assumed to have a relatively low use frequency, is more complicated than the operation of relative position control, which is assumed to have a relatively high use frequency. As a result, the user's willingness to use normally, i.e., willing to perform relative position control on a daily basis, and special use, i.e., willingness to do absolute position control if they become aware of misalignment or become unacceptable. The reflected operation mode can be realized.

  Further, as described above, since the absolute position control of the memory sheet is not frequently used for many years of use, it is not preferable to add a new switch or operation member for absolute position control in the operation unit 3. . According to the configuration of the present invention, the relative position control or the absolute position control is performed with or without the button long press, double press, and double press without changing the button configuration of the operation unit that is generally equipped on the memory sheet. Therefore, the operability, versatility, and low cost of the operation unit or the memory sheet can be ensured.

  In addition, according to the present invention, since the inertial movement amount of the seat 2 can be appropriately corrected according to aging deterioration, it is possible to provide a memory seat that can obtain accurate position control even when the vehicle is used over time. it can.

<Modification>
The preferred embodiments of the present invention have been described above, but the present invention can be modified in various ways as follows.

  In the above embodiment, the control of the sliding operation of the sheet 2 has been described, but the movement of the sheet 2 in the memory sheet is not limited to this. For example, the present invention can also be applied to a reclining operation for controlling the reclining angle of the seat 2, a lift-up / down operation for controlling the lift position of the seat 2, and a tilt operation for controlling the angle of the seat cushion of the seat 2. The seat operating end used for the absolute position control is the reclining morse in the reclining operation control, the lifter down morse in the lift up / down operation control, and the tilt down morse position in the tilt operation control. Good.

  In the above-described embodiment, the configuration in which the operation state of the motor 40 is detected by the ripple detection method has been described. However, the present invention can also be applied to a configuration using a sensor detection method in which the operation state of the motor 40 is directly detected.

  In the said Example, although the structure to which absolute position control is applied by a user's intention as a trigger was shown, you may employ | adopt the structure which alerts execution of absolute position control to a user. For example, when the cumulative number of reproductions stored in the reproduction number storage unit 56 reaches a predetermined value, or when the travel distance reaches a predetermined value, the CPU 50 controls the absolute position storage to the user by a notification means (not shown). Alternatively, absolute position reproduction control may be urged. The notification by the notification means may be performed, for example, by display on a car navigation screen, voice guidance, or the like.

  In the above embodiment, it is assumed that the absolute position control is performed while the user is seated on the seat 2, but the absolute position control is executed while the user is away, for example, after getting off or just before getting on. It is good also as composition to do.

  In the above-described embodiment, the configuration in which the correction amount in the inertia correction control is derived from the correction formula is shown, but the correction amount may be selected from the reference table. That is, the correction amount may be specified from a matrix using the motor rotation speed and the cumulative number of reproductions as parameters.

  In the above-described embodiment, the configuration in which the correction formula switching in the inertia correction control depends on the cumulative number of reproductions is shown, but the correction formula switching may be configured to depend on another index indicating the usage amount of the memory sheet. . For example, as the usage amount, an accumulated rotation amount of the motor 40 as an index indicating consumption of the motor 40, an elapsed time (for example, yearly) from the time of purchase of the vehicle as an index indicating aging, or an index indicating a seat usage amount The cumulative travel distance of the vehicle or the like may be adopted.

DESCRIPTION OF SYMBOLS 1 Memory sheet 2 Sheet 3 Operation part 4 Drive part 5 Control apparatus 10 Control system 30, 31, 32 Switch 40 Motor 50 CPU
51 Input Interface 52 Memory 53 Timer 54 Current Position Storage Unit 55 Designated Position Storage Unit 56 Reproduction Count Storage Unit 57 Correction Formula Storage Unit

Claims (8)

A vehicle seat control system for storing and reproducing a user-specified position of a vehicle seat,
A drive unit for operating the vehicle seat;
An operation unit for accepting user operations;
Relative position control means for receiving a signal generated by the first user operation and executing relative position control for storing or reproducing the user-specified position with reference to the current position of the vehicle seat, and a second user operation The vehicle seat is moved to the operating end by the driving unit, and the driving unit is operated with reference to the position of the operating end to store or reproduce the user-specified position. A vehicle seat control system comprising: a control device having absolute position control means for executing absolute position control.   2. The vehicle seat control system according to claim 1, wherein the second user operation requires a longer operation time or a larger number of operation steps than the first user operation.   3. The vehicle seat control system according to claim 1, wherein when the absolute position control means stores the user-specified position, the position of the vehicle seat before and after the movement of the vehicle seat to the operating end. 4. A vehicle seat control system configured to store a user-specified position specified by the difference between the two.   4. The vehicle seat control system according to claim 1, wherein when the absolute position control means reproduces the user-designated position, the user-designated position starts from the operating end of the vehicle seat. 5. A vehicle seat control system configured to move the vehicle seat based on a position.   The vehicle seat control system according to claim 2, wherein the first user operation is specified by a pressing time of a predetermined switch of the user operation unit being less than a threshold value, and the second user operation is A vehicle seat control system, which is specified by a time when the predetermined switch is pressed being equal to or greater than the threshold value. The vehicle seat control system according to any one of claims 1 to 5, wherein the drive unit includes a motor,
The control device is configured to stop a driving signal to the motor when the vehicle seat reaches a position at a predetermined distance from the user-specified position, and the predetermined distance corresponds to a cumulative usage amount of the motor. The vehicle seat control system is corrected.   The vehicle seat control system according to claim 6, wherein the cumulative usage amount of the motor is a cumulative number of regenerations in which the control device drives the motor.   The vehicle seat control system according to claim 6 or 7, wherein the predetermined distance is increased with respect to a cumulative usage amount of the motor.

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