阅读说明：本技术 座椅的操作区间设定系统 (Seat operation section setting system ) 是由 李晋雨 于 2020-11-20 设计创作，主要内容包括：本发明的实施例提供一种座椅的操作区间设定系统。座椅的操作区间设定系统包括：下部轨道,设置在安装于车身的地板面板上的框架上；上部轨道,被设置成沿着所述下部轨道可滑动；非接触传感器,连接到所述上部轨道,以感测设置在所述下部轨道的一侧的支架；以及控制部,接收所述非接触传感器的接通(ON)/断开(OFF)信号,以设定所述座椅的虚拟极限。(An embodiment of the present invention provides an operation section setting system of a seat. The seat operation section setting system includes: a lower rail provided on a frame mounted on a floor panel of a vehicle body; an upper rail disposed to be slidable along the lower rail; a non-contact sensor connected to the upper rail to sense a bracket disposed at one side of the lower rail; and a control part receiving an ON (ON)/OFF (OFF) signal of the non-contact sensor to set a virtual limit of the seat.)

1. An operation zone setting system of a seat, comprising:

a lower rail provided on a frame mounted on a floor panel of a vehicle body;

an upper rail disposed to be slidable along the lower rail;

a non-contact sensor connected to the upper rail to sense a bracket disposed at one side of the lower rail; and

and a control part receiving an on signal or an off signal of the non-contact sensor to set a virtual limit of the seat.

2. The operation zone setting system of a seat according to claim 1,

the control section recognizes a point at which a signal of the non-contact sensor changes from an on state to an off state or a point at which the signal changes from the off state to the on state as a movable physical end of the seat, and sets a virtual limit with the end as a reference.

3. The operation zone setting system of a seat according to claim 2, further comprising a motor that drives the seat and a hall sensor that outputs a pulse based on a rotation amount of the motor.

4. The operation zone setting system of a seat according to claim 3,

when the rear virtual limit of the seat is set for the first time, the control portion stores the number of pulses output by the hall sensor when the seat moves from the physically rearmost position of the seat to a position where the signal of the non-contact sensor transitions from on to off.

5. The operation zone setting system of a seat according to claim 3,

the control section sets a position where a preset first pulse number is compensated with reference to the end as the virtual limit.

6. The operation zone setting system of a seat according to claim 3,

a control section that updates the virtual limit when the seat moves in a direction toward the virtual limit at a position of a second pulse number preset before the virtual limit as a reference in a case where an error occurs in the hall sensor,

the error of the hall sensor indicates that the seat reaches the end or the seat is stuck.

7. The operation zone setting system of a seat according to claim 6,

the virtual limits include a front virtual limit and a rear virtual limit based on the position of the seat,

when one of the front virtual limit and the rear virtual limit has been updated, the control portion further updates the other virtual limit.

8. The operation zone setting system of a seat according to claim 7,

the control section estimates a distance between the front virtual limit and the rear virtual limit based on the number of pulses output from the hall sensor,

when one of the front virtual limit and the rear virtual limit has been updated, the control portion updates the other virtual limit based on the stored distance between the front virtual limit and the rear virtual limit.

9. The operation zone setting system of a seat according to claim 6,

when an error occurs at a point of the hall sensor between a position which is deviated from the virtual limit and the second pulse number before with the virtual limit as a reference, the control section maintains the existing virtual limit regardless of the error of the hall sensor.

10. The operation zone setting system of a seat according to claim 3,

the control unit identifies a point where the hall sensor is in error as the end, and updates the existing virtual limit with the end as a reference.

11. The operation zone setting system of a seat according to claim 1,

outputting a turn-on signal when the non-contact sensor senses the cradle.

12. The operation zone setting system of a seat according to claim 1,

the bracket has a shape extending in a direction in which the lower rail extends,

the extension length of the bracket is less than that of the lower rail.

13. The operation zone setting system of a seat according to claim 1,

the control unit sets a length between a front virtual limit and a rear virtual limit based on a length over which the bracket extends.

14. The operation zone setting system of a seat according to claim 1,

the control portion sets a section in which the non-contact sensor can sense the bracket as an operation section of the seat,

the control unit sets the virtual limit with reference to the operation section.

15. The operation zone setting system of a seat according to claim 14,

the operating zone represents a physical extremity of the movable seat.

Technical Field

The present invention relates to a seat operation section setting system for setting a virtual limit of a seat using a non-contact sensor.

Background

In general, various convenience devices are provided in a vehicle mainly for improving convenience of a driver or a passenger. For example, a power seat (power seat) may be mentioned. In the power seat, if a specific driver previously memorizes the seat position according to his body shape, the seat position can be adjusted to the previously memorized seat position by simply operating the memory regeneration button thereafter. That is, the current seat position can be easily adjusted to the previously memorized seat position by only pressing the memory regeneration button without readjusting different seat positions according to the driver. The power seat needs to detect the number of rotations of the motor to control the position. For this, a ring magnet and a reed switch, which rotate together with the rotation shaft of the motor, or a hall sensor is used. The motor controls only the position of the Power Seat by a Power Seat Control Unit (controller) based on the counting of the pulse waveform generated by the hall sensor or the reed switch.

On the other hand, when the power seat is moved to the sliding end, a seat jam occurs due to the structural member. When the seat jam occurs, the seat cannot be moved normally even if the switch is operated. Therefore, the sticking of the seat or the seat coming off the track is prevented by setting the virtual limit point of the movable seat. However, the conventional slide frame structure has a portion where the upper rail and the lower rail intersect each other, and thus can be moved to the slide end, but the new power frame has a problem that the seat is separated from the rail at the forefront of the frame because the portion where the upper rail and the lower rail intersect each other is small when moving to the forefront due to the characteristics of the frame. Therefore, it is necessary to reset the limit point of the movable seat according to the change of the track structure of the seat.

Disclosure of Invention

Technical problem to be solved

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an operation zone setting system for a seat, which can set a virtual limit to a predetermined position using a non-contact sensor.

The technical problem to be solved by the invention is to provide an operation section setting system of a seat, which can change a virtual limit by simultaneously using a non-contact sensor and a Hall sensor.

(II) technical scheme

An embodiment of the present invention provides an operation section setting system of a seat. The method comprises the following steps: a lower rail provided on a frame mounted on a floor panel of a vehicle body; an upper rail disposed to be slidable along the lower rail; a non-contact sensor connected to the upper rail to sense a bracket disposed at one side of the lower rail; and a control part receiving an on signal or an off signal of the non-contact sensor to set a virtual limit of the seat.

According to one example, the control unit recognizes a point at which the signal of the non-contact sensor changes from the on state to the off state or a point at which the signal changes from the off state to the on state as a physical end at which the seat is movable, and sets a virtual limit with the end as a reference.

According to an example, further comprising a motor driving the seat and a hall sensor outputting a pulse based on a rotation amount of the motor.

According to one example, when the rear virtual limit of the seat is set for the first time, the control portion stores the number of pulses output by the hall sensor when the seat moves from the physically rearmost position of the seat to a position where the signal of the non-contact sensor is changed from on to off.

According to one example, the control section sets a position where a preset first pulse number is compensated with reference to the tip as the virtual limit.

According to one example, the control part updates the virtual limit when the seat moves in a direction toward the virtual limit at a position of a second pulse number preset before the seat with reference to the virtual limit, in a case where an error occurs in the hall sensor, which indicates a case where the seat reaches the end or a case where a seizure phenomenon of the seat occurs.

According to one example, the virtual limits include a front virtual limit and a rear virtual limit with reference to the position of the seat, and the control portion further updates one of the front virtual limit and the rear virtual limit when the other virtual limit has been updated.

According to one example, the control portion estimates a distance between the front virtual limit and the rear virtual limit based on the number of pulses output from the hall sensor, and when one of the front virtual limit and the rear virtual limit has been updated, the control portion updates the other virtual limit based on the stored distance between the front virtual limit and the rear virtual limit.

According to one example, when an error occurs at a point of the hall sensor between a position deviated from the virtual limit and the second pulse number before with reference to the virtual limit, the control section maintains the existing virtual limit regardless of the error of the hall sensor.

According to one example, the control unit identifies a point at which an error occurs in the hall sensor as the end point, and updates the existing virtual limit with reference to the end point.

According to an example, a turn-on signal is output when the non-contact sensor senses the cradle.

According to an example, the bracket has a shape extending in a direction in which the lower rail extends, and an extension length of the bracket is smaller than an extension length of the lower rail.

According to one example, the control unit sets a length between the front virtual limit and the rear virtual limit with reference to a length over which the bracket extends.

According to an example, the control unit sets a section in which the non-contact sensor can sense the bracket as an operation section of the seat, and the control unit sets the virtual limit with reference to the operation section.

According to one example, the operating zone represents a physical extremity of the movable seat.

(III) advantageous effects

According to an embodiment of the present invention, the operation zone setting system of the seat may set a virtual limit for setting the operation zone of the seat by sensing the bracket disposed at one side of the lower rail through the non-contact sensor. Therefore, even in the case where the vehicle is subjected to an impact or an error occurs in the hall sensor, the operation section setting system of the seat can set the virtual limit to the predetermined position.

According to the embodiment of the present invention, the operation section setting system of the seat can accurately set the operation section of the seat, and thus the seat can be prevented from being separated from the track by changing the operation section of the seat even if the vehicle receives an impact.

According to the embodiment of the present invention, the operation section setting system of the seat can set the virtual limit in which the external factors and errors to be applied to the seat are all reflected.

Drawings

Fig. 1 is a diagram showing an operation section setting system of a seat according to an embodiment of the present invention.

Fig. 2 is a diagram for explaining a positional relationship of the non-contact sensor and the holder according to the embodiment of the present invention.

Fig. 3 is a diagram illustrating an example of setting an operation section of a seat according to an embodiment of the present invention.

Fig. 4 is a diagram illustrating another example of setting an operation section of a seat according to an embodiment of the present invention.

Fig. 5 is a diagram illustrating a method of updating a virtual limit using a non-contact sensor and a hall sensor at the same time according to an embodiment of the present invention.

Fig. 6 is a flowchart illustrating a method of setting an operation section of a seat according to an embodiment of the present invention.

Detailed Description

Advantages and features of the present invention and methods of accomplishing the same will become apparent from the following detailed description of the embodiments and the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, which are provided for complete disclosure of the present invention and to fully disclose the scope of the present invention to those skilled in the art to which the present invention pertains, and the present invention is defined only by the appended claims, and may be implemented in various ways. Like reference numerals refer to like elements throughout the specification.

Terms such as "section," "unit," "module," and the like, described in the specification denote units that process at least one function or operation, and may be implemented by hardware or software or a combination of hardware and software.

In the present specification, the names of the components are classified into first, second, and the like in order to distinguish the components from each other because the names of the components are the same, and the following description is not limited to this order.

The detailed description is merely exemplary of the invention. In addition, the foregoing illustrates and describes the preferred embodiments of the present invention, which is capable of use in various combinations, permutations and environments. That is, variations or modifications may be made within the scope of the inventive concept disclosed in the present specification, within the scope equivalent to the disclosed content, and/or within the skill or knowledge of the art. The described embodiments explain the best state for realizing the technical idea of the invention and can also make various changes required in specific application fields and uses of the invention. Therefore, the specific description of the invention above is not intended to limit the invention to the particular forms disclosed. In addition, it is to be construed that the claims also include other embodiments.

Fig. 1 is a diagram showing an operation section setting system of a seat according to an embodiment of the present invention, and fig. 2 is a diagram for explaining a positional relationship of a non-contact sensor and a bracket according to an embodiment of the present invention.

Referring to fig. 1 and 2, the operating section setting system 1 of the seat may include a seat 10, a non-contact sensor 20, a hall sensor 30, a motor 50, and a control part 200. The non-contact sensor 20 and the hall sensor 30 may be attached to the seat 10.

The non-contact sensor 20 may be attached to one side of the upper rail 180. The upper rail 180 may be provided to be slidable along the lower rail 110. The upper track 180 is connected to the seat 10 and may guide the forward or rearward driving of the seat 10. That is, the seat 10 is driven by the motor 50 and can move in a direction in which the lower rail 110 and the upper rail 180 extend. The lower rail 110 may be provided on a frame (not shown) mounted on a floor panel of a vehicle body. Wherein the lower rail 110 may be integrally formed with a frame (not shown). The lower rail 110 and the upper rail 180 may extend in one direction. When the upper rail 180 moves forward of the seat 10, the portion of the upper rail 180 overlapping the lower rail 110 decreases. Therefore, the rigidity of the rails is reduced, and when the vehicle collides, the lower rail 110 and the upper rail 180 are separated and cause injury to people. Therefore, it is necessary to set a section in which the upper rail 180 can be slid.

A bracket 150 may be provided at one side of the lower rail 110. The bracket 150 may have a shape extending toward a direction in which the lower rail 110 extends. The extension length of the bracket 150 may be less than that of the lower rail 110. For example, the length of lower track 110 may be about 290mm and the length of carriage 150 may be about 100 mm. The non-contact sensor 20 may sense the cradle 150. The upper rail 180 may move on the lower rail 110 to enable the non-contact sensor 20 to recognize the cradle 150. The noncontact sensor 20 and the holder 150 may be disposed to overlap in the vertical direction. The vertical direction may mean a direction from the lower rail 110 toward the upper rail 180. An ON (ON) state signal may be output when the non-contact sensor 20 senses the cradle 150, and an OFF (OFF) state signal may be output when the non-contact sensor 20 does not sense the cradle 150. The signal output from the non-contact sensor 20 may be transmitted to the control section 200.

The hall sensor 30 may output a pulse according to the rotation of the motor 50. The hall sensor 30 generates a hall voltage each time it senses one rotation of the rotor of the motor 50, and may output the generated hall voltage as a pulse signal. The position and the moving distance of the seat 10 can be estimated from the number of pulses output from the hall sensor 30. The control unit 200 may estimate the position and the movement distance of the seat 10.

The control unit 200 may set a virtual limit as an operation limit of the seat 10 based on information measured by the non-contact sensor 20 and the hall sensor 30. The control portion 200 may set the virtual limit of the seat 10 based on the on-state signal and the off-state signal output from the non-contact sensor 20. The virtual limits may include a front virtual limit and a rear virtual limit based on the position of the seat 10. That is, the limit point of the operation section of the seat 10 set in front of the seat 10 may be the front virtual limit, and the limit point of the operation section of the seat 10 set in rear of the seat 10 may be the rear virtual limit. The non-contact sensor 20 may transmit an on-state signal of the sensing bracket 150 to the control part 200. When the non-contact sensor 20 cannot sense the cradle 150 according to the movement of the upper rail 180, the non-contact sensor 20 may transmit a disconnection state signal to the control part 200. The non-contact sensor 20 may transmit the on-state signal and the off-state signal to the control part 200 in real time, and the control part 200 may confirm that the signal received from the non-contact sensor 20 is changed from the on-state signal to the off-state signal or from the off-state signal to the on-state signal. That is, the control part 200 may recognize a point at which the signal received from the non-contact sensor 20 is changed from the on-state signal to the off-state signal or a point at which the off-state signal is changed to the on-state signal as a limit point (physical end) at which the seat 10 can be physically moved. The control section 200 may set the virtual limit with reference to the identified physical end. The control section 200 may set a position of a predetermined number of pulses ahead from the physical end as a virtual limit. At this time, the previous position may be within a position where the noncontact sensor 20 can recognize the stent 150. For example, the predetermined number of pulses may be 9 pulses to 11 pulses.

The control unit 200 may include a state determination unit 210, a memory 230, a virtual limit setting unit 250, and a drive control unit 270.

The state determination portion 210 may determine whether the seat 10 is located within the operation section of the seat 10 and the seat reaches the physical end for determining the virtual limit based on the signal of the non-contact sensor 20. The state determination unit 210 may estimate the position and the movement distance of the seat 10 based on the number of pulses measured by the hall sensor 30.

The memory 230 may store various information such as the position of the seat 10, the moving distance of the seat 10, and the distance between the front virtual limit and the rear virtual limit, which are determined by the state determination unit 210. Additionally, the memory 230 may store how far apart the virtual limit setting is from the physical end of the seat 10. The separation distance between the virtual limit and the physical tip can be derived based on the number of pulses output by the hall sensor 30.

The virtual limit setting part 250 may set the virtual limit based on the signal sensed by the non-contact sensor 20, and may update the virtual limit based on the number of pulses transmitted by the hall sensor 30, data stored in the memory 230, and the preset virtual limit. When an error occurs in the hall sensor 30, the virtual limit setting part 250 may update the preset virtual limit. A fault condition with the hall sensor 30 may indicate a condition where the seat 10 reaches a physical end or a seat jam condition. The virtual limit setting part 250 may recognize a point where the hall sensor has an error as a physical end, and may set a position of a predetermined number of pulses before with reference to the physical end as a new virtual limit. At this time, the previous position may be within a position where the noncontact sensor 20 can recognize the stent 150.

The drive control section 270 may control the driving of the seat 10 based on the set virtual limit. Specifically, the drive control section 270 may control the rotation amount of the motor 50 based on the virtual limit, and may control the motor 50 based on the current position of the seat 10 derived from the information measured by the hall sensor 30 to move the seat 10 between the front and rear virtual limits. The drive control 270 may control the motor 50 to move the seat 10 between the front and rear virtual limits.

According to the embodiment of the present invention, even in the case of a vehicle impact or an error of the hall sensor 30, the virtual limit can be set to a predetermined position by the non-contact sensor 20.

In addition, according to the embodiment of the present invention, the operation section setting system 1 of the seat can accurately set the operation section of the seat 10, and therefore, even if the vehicle receives an impact, the seat 10 can be prevented from being separated from the track by changing the operation section of the seat 10.

Fig. 3 is a diagram illustrating an example of setting an operation section of a seat according to an embodiment of the present invention.

Referring to fig. 1 to 3, the upper rail 180 may move from the rear to the front of the seat 10, and the non-contact sensor 20 may sense the bracket 150 during the movement from the rear to the front of the seat 10. The control unit 200 may set the length between the front virtual limit and the rear virtual limit based on the length of the bracket 150. That is, the control part 200 may set a section in which the non-contact sensor 20 can sense the bracket 150 as an operation section of the seat 10, and may set the virtual limit with the operation section as a reference.

For example, the state decision section 210 may recognize a point at which the signal output from the non-contact sensor 20 transitions from the on-state signal to the off-state signal as a physical end at which the seat 10 can move. In fact, even if the seat 10 can be moved beyond the point at which the signal output from the non-contact sensor 20 is changed from the on-state signal to the off-state signal, the state decision section 210 may recognize the point at which the signal of the non-contact sensor 20 is changed from the on-state signal to the off-state signal as a physical end in order to prevent the seat 10 from being detached from the lower rail 110. The virtual limit setting unit 250 may set a position where the preset first pulse number is compensated with respect to the physical end as the virtual limit. For example, the first number of pulses may be 9 pulses to 11 pulses. Wherein the first number of pulses may be a number that is changed according to a designer. At this time, the virtual limit setting unit 250 may set the virtual limit at a position at which the non-contact sensor 20 can output the on-state signal.

For example, the upper rail 180 may move to the rearmost of the seat 10, and the non-contact sensor 20 may sense the bracket 150 during the movement of the seat 10 to the rearmost. In setting the rear virtual limit of the seat 10 for the first time, the memory 230 may store the number of pulses output by the hall sensor 30 when the seat 10 moves from the physical rearmost position of the seat 10 (position where hard stop occurs) to a position where the signal of the non-contact sensor 20 transitions from the on state signal to the off state signal. The virtual limit setting unit 250 may set a position where the pulse number is compensated with reference to a point at which the signal of the non-contact sensor 20 changes from the on-state signal to the off-state signal as a rear virtual limit. The state determination section 210 can estimate the distance from the physical rearmost position to the rear virtual limit of the seat 10 from the number of pulses stored in the memory 230.

According to an embodiment of the present invention, the control section 200 may set the virtual limit based on the signal output from the non-contact sensor 20. In addition, in the case of setting the initial virtual limit of the seat 10, the control portion 200 may set the virtual limit based on the signal output from the non-contact sensor 20. At this time, there is a risk that a hard stop occurs due to the movement inertia of the seat 10 as the first pulse number is smaller, and the operation section of the seat 10 is reduced as the first pulse number is larger, so the designer can set the first pulse number in consideration of the above-described problem.

Fig. 4 is a diagram illustrating another example of setting an operation section of a seat according to an embodiment of the present invention. For the sake of simplicity, the description of overlapping contents is omitted.

Referring to fig. 1, 2, and 4, the upper rail 180 may move from the front to the rear of the seat 10, and the non-contact sensor 20 may sense the bracket 150 while moving from the front to the rear of the seat 10. The state decision section 210 can recognize the point at which the signal of the non-contact sensor 20 transitions from the on-state signal to the off-state signal according to the embodiment of fig. 3. However, while the seat 10 is moving from the front to the rear again, there is a point at which the signal of the non-contact sensor 20 changes from the off-state signal to the on-state signal. The virtual limit setting part 250 may set the virtual limit based on a point at which the signal of the non-contact sensor 20 transitions from the off-state signal to the on-state signal. The virtual limit setting part 250 can confirm whether the existing set virtual limit is identical to the newly set virtual limit based on the position and the moving distance of the seat 10 stored in the memory 230.

According to the embodiment of the present invention, the operation section setting system 1 of the seat can set the virtual limit at an accurate position by repeatedly confirming the virtual limit set by the comparison. In addition, when the currently set virtual limit is different from the newly measured virtual limit, the virtual limit setting unit 250 may control the seat 10 based on the newly measured virtual limit. Therefore, even if an error occurs in the position of the seat 10 due to an external impact or an error of a sensor, or an error occurs when the position of the seat 10 is confirmed, the operation section setting system 1 of the seat can set a virtual limit in which the error is small.

Fig. 5 is a diagram illustrating a method of updating a virtual limit using a non-contact sensor and a hall sensor at the same time according to an embodiment of the present invention.

Referring to fig. 1 and 5, the control unit 200 may update the existing set virtual limit. The control section 200 may monitor whether an error occurs in the hall sensor 30 to update the virtual limit. A fault condition with the hall sensor 30 may indicate a condition where the seat 10 reaches a physical end or a jam condition of the seat 10 occurs. When the seat 10 reaches the physical end or a jamming phenomenon of the seat 10 occurs, a phenomenon in which the motor 50 moving the seat 10 does not rotate occurs, and an error may occur in the hall sensor 30 sensing the rotation of the rotor of the motor 50. Therefore, the control portion 200 may determine the current state of the seat 10 based on whether an error occurs in the hall sensor 30.

For example, when an error occurs in the hall sensor 30, the control section 200 may update the existing virtual limit when the seat moves for a predetermined time or more from the position P1 of the second pulse number preset before with the existing set virtual limit as a reference toward the existing virtual limit. At this time, the previous position may indicate a position where the non-contact sensor 20 may output the on-state signal. That is, the control part 200 may set a compensation section to the position of the previous second pulse number with reference to the existing virtual limit, and may update the virtual limit when an error occurs in the hall sensor 30 within the compensation section. For example, the second number of pulses may be about 25 pulses, and the predetermined time may represent 1 second or more. That is, it can be estimated that the seat 10 is located at the physical end due to the error of the hall sensor 30, but when the seat is continuously moved in the direction of the virtual limit from the point where the error of the hall sensor 30 occurs, a phenomenon that the seat is separated from the track may occur. Therefore, the state determination unit 210 of the control unit 200 may determine the point where the error occurs in the hall sensor 30 as the physical end, and the virtual limit setting unit 250 may set the position of the first pulse number before the point where the error occurs in the hall sensor 30 as the new virtual limit. The position of the newly set virtual limit may be a position at which the non-contact sensor 20 outputs the on-state signal. The memory 230 may store distance information between the existing front virtual limit and the existing rear virtual limit based on the number of pulses output from the hall sensor 30. The virtual limit setting part 250 may estimate a distance between the existing front virtual limit and the existing rear virtual limit, and may further update the other virtual limit out of the updated one of the front virtual limit and the rear virtual limit. For example, when the point at which the hall sensor 30 makes an error is a point adjacent to the front virtual limit, the virtual limit setting unit 250 may update the front virtual limit. At this time, the virtual limit setting unit 250 may update the rear virtual limit based on the position of the front virtual limit newly set based on the information stored in the memory 230.

For example, when an error occurs in the hall sensor 30 at a point P2 that is apart from the position of the second pulse number previously preset with reference to the previously set virtual limit, the control section 200 may maintain the previously set virtual limit regardless of the error of the hall sensor 30. When the hall sensor 30 has an error in the compensation section with the virtual limit as a reference, it is reasonable to suspect that the physical end is changed by an external factor or that the position of the seat 10 is suddenly changed. However, when the hall sensor 30 has an error at the point P2 outside the compensation section with the virtual limit as a reference, the control unit 200 may determine that the hall sensor 30 has an error. Therefore, the control unit 200 may not update the existing virtual limit.

According to the embodiment of the present invention, the control part 200 may recognize a point where the hall sensor 30 has an error as the movable physical end of the seat 10, and may update the existing virtual limit with reference to the physical end. Even in the case where the position of the seat 10 is suddenly changed or an error occurs in the hall sensor 30 due to an external factor, the control part 200 may determine whether the hall sensor 30 has an error within a compensation section set with reference to the existing virtual limit, and may update the virtual limit or maintain the existing virtual limit based thereon. That is, the operation section setting system 1 of the seat according to the embodiment of the invention can set the virtual limit reflecting all the cases of the external factors and the errors applied to the seat 10.

Fig. 6 is a flowchart illustrating an operation section setting method of a seat according to an embodiment of the present invention. For the sake of simplicity, the description of overlapping contents is omitted.

Referring to fig. 6, the non-contact sensor attached to the upper rail may sense the bracket attached to the lower rail. The extended length of the bracket may be interpreted as limiting the operating range of the movable seat. That is, the longer the length of the bracket, the longer the operation section of the moving seat can be. The operation section for moving the seat becomes longer because the longer the length of the bracket is, the longer the time during which the non-contact sensor can output the on-state signal becomes. The point at which the signal of the non-contact sensor switches from on to off or from off to on may represent the point at which movement of the seat is restricted. Accordingly, the control part may recognize the point as a physical end of the movable seat (S100).

The control section may set the virtual limit with reference to the point identified as the physical end. The control section may set a position where the first pulse number is compensated from the point as the virtual limit. At this time, the position compensated for the first number of pulses from the point may represent a position at which the non-contact sensor can output the on-state signal (S200).

The control section may monitor whether an error occurs in the hall sensor. The control portion may update the existing set virtual limit based on whether or not an error occurs in the hall sensor. Specifically, when the hall sensor outputs an error signal, the control portion may determine whether a point at which the error signal is output is within the compensation section. The compensation interval may indicate the position of the previous second pulse number with reference to the previously set virtual limit (S300).

When the point at which the error signal is output is not a point within the compensation section, the control section may maintain the existing virtual limit. The control unit may update the existing virtual limit when the point at which the error signal is output is a point within the compensation interval. The control part recognizes a point at which the error signal is output as a new physical end, and sets a position where the first pulse number is compensated with reference to the newly recognized physical end as a new virtual limit (S400).

Although the embodiments of the present invention have been described above with reference to the drawings, it will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above described embodiments are illustrative in all respects, not restrictive.