Seat condition detection device

Abstract

To make it possible to accurately detect a state of a vehicle seat.SOLUTION: A seat state detection device of the present invention includes: a detection part 22 which detects a movable state value representing a state of a movable mechanism 13 for moving a seat 11 in a longitudinal direction in response to an operator's operation for moving the seat 11 of a vehicle in the longitudinal direction; and a determination part 23 which determines to be in a first state when the detected movable state value exceeds a first threshold value and determines to be in a second state when the movable state value is less than a second threshold value set lower than the first threshold value.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a seat condition detection device for detecting the condition of a vehicle seat. [Background technology]

[0002] The seats installed in the vehicle are equipped with a movable mechanism that allows them to slide forward and backward. The passenger operates the seat to slide according to their body shape and posture, and the movable mechanism causes the seat to slide forward and backward.

[0003] When a vehicle seat slides forward or backward, it may become pinched. In particular, when the seat slides backward, it is difficult for the operator to check the situation behind the seat, and a person or luggage seated in the rear seat may become pinched. For this reason, Patent Document 1 describes a technology for detecting pinching of a foreign object when the seat is moving. Specifically, Patent Document 1 measures fluctuations in the seat's driving force and detects pinching of a foreign object from the amount of fluctuation. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-131138 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the technology described in Patent Document 1 above has the problem that it is difficult to accurately detect entrapment depending on the vehicle state. For example, when the vehicle is going uphill, a rearward load is applied to the seat, and if the seat is slid in this state, it is not possible to properly measure the fluctuation in the rearward driving force of the seat. As a result, it is difficult to accurately detect the seat state.

[0006] Therefore, an object of the present invention is to solve the above-mentioned problem that the state of a vehicle seat cannot be detected with high accuracy. [Means for solving the problem]

[0007] A seat state detection device according to one embodiment of the present invention includes: a detection unit that detects a movement status value that indicates a status of a movement mechanism that moves the seat in the forward and backward directions in response to a movement operation of the seat in the forward and backward directions by an operator; a determination unit that determines a first state when the detected mobility status value exceeds a first threshold, and determines a second state when the detected mobility status value falls below a second threshold that is set to a value lower than the first threshold; Equipped with The structure is as follows.

[0008] Further, a seat state detection method according to one aspect of the present invention includes: detecting a movement status value representing a status of a movement mechanism that moves the seat in the forward and backward directions in response to a movement operation of the seat in the forward and backward directions by an operator; When the detected mobility status value exceeds a first threshold, the state is determined to be a first state, and when the detected mobility status value falls below a second threshold that is set to a value lower than the first threshold, the state is determined to be a second state. The structure is as follows.

[0009] Furthermore, the seat state detection device according to one aspect of the present invention includes: a detection unit that detects a movement status value that indicates a status of a movement mechanism that moves the seat in the forward and backward directions in response to a movement operation of the seat in the forward and backward directions by an operator; a determination unit that determines a first state when the detected mobility status value is less than a first threshold value, and determines a second state when the detected mobility status value exceeds a second threshold value that is set to a value higher than the first threshold value; Equipped with The structure is as follows. [Effects of the Invention]

[0010] With the above-described configuration, the present invention can accurately detect the state of a vehicle seat. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a diagram showing the configuration of a seat state detection device according to a first embodiment of the present invention. [Figure 2] 2A to 2C are diagrams illustrating the operation of the drive mechanism of the seat disclosed in FIG. 1. [Figure 3] 2A to 2C are diagrams illustrating the operation of the drive mechanism of the seat disclosed in FIG. 1. [Figure 4] 2 is a diagram showing an example of data processed by the control device disclosed in FIG. 1; [Figure 5] 2 is a diagram showing an example of data processed by the control device disclosed in FIG. 1; [Figure 6] 2 is a diagram showing an example of data processed by the control device disclosed in FIG. 1; [Figure 7] 2 is a flowchart showing the operation of the control device disclosed in FIG. 1. DETAILED DESCRIPTION OF THE INVENTION

[0012] <Embodiment 1> A first embodiment of the present invention will be described with reference to Fig. 1 to Fig. 7. Fig. 1 to Fig. 6 are diagrams for explaining the configuration of a seat condition detection device, and Fig. 7 is a diagram for explaining the operation of the seat condition detection device.

[0013] The seat condition detection device of the present invention detects the condition of a seat installed in a vehicle. In particular, the seat condition detection device in this embodiment detects a state in which a foreign object is caught by the seat when the seat slides forward and backward.

[0014] As shown in Fig. 1, a seat 10 installed in a vehicle includes a seat body 11, an operation unit 12 that inputs operation commands to the seat body 11, a slide mechanism 13 that slides the seat body 11 in the front-to-rear direction, a drive device 14 that drives the slide mechanism 13, and a load detection device 15 that detects the load value applied to the slide mechanism 13. Although not shown, the seat 10 also includes other movable mechanisms that move components such as the back of the seat body 11. Each component will be described in detail below.

[0015] In this embodiment, the operation unit 12 has a switch that the operator uses to input an operation command to slide the seat body in the front-rear direction. The operation unit 12 then outputs the input operation command to the control device 20. However, the operation unit 12 also has a switch that inputs a command to move other components of the seat body 11.

[0016] In this embodiment, the slide mechanism 13 (movable mechanism) is configured, for example, as shown in FIG. 2 , as a rack-and-pinion mechanism. The pinion 13a on the seat body 11 engages with a rack 13b on the vehicle side extending in the fore-and-aft direction, rotates, and moves on the rack 13b, thereby moving the seat body 11 in the fore-and-aft direction. Correspondingly, the drive unit 14 is configured as a motor that rotationally drives the pinion 13a in response to a command from the control unit 20, as will be described later. Note that in this embodiment, the slide mechanism 13 is illustrated as having the pinion 13a on the seat body 11 side and the rack 13b on the vehicle side. However, the slide mechanism 13 may be configured as a rack on the seat body 11 side and a pinion on the vehicle side. Furthermore, in the rack-and-pinion mechanism described above, the pinion 13a is rotationally driven by a motor, but the rack 13b may also be rotationally driven. Furthermore, in the present invention, the slide mechanism is not limited to a rack-and-pinion mechanism and may be configured as any mechanism.

[0017] The load detection device 15 (detection unit) is configured to measure the voltage and current values ​​applied to the motor that rotates the pinion 13a, and detect the driving force of the motor calculated from these measurements as the load value applied to the slide mechanism 13. For example, the load value applied to the slide mechanism 13 detected by the load detection device 15 is shown in a graph in FIG. 4, with driving force on the vertical axis. The load value (driving force) detected by the load detection device 15 is output to the control device 20. However, the load detection device 15 is not limited to detecting the load value applied to the slide mechanism 13, and may detect any value representing the status of the slide mechanism 13 that moves the seat main body 11 in the fore-and-aft direction. For example, the load detection device 15 may measure the pulse frequency of the motor that is the drive device 14 to calculate the moving speed of the seat main body 11 in the fore-and-aft direction, and detect this moving speed as the moving speed representing the status of the slide mechanism. The case of detecting the pulse frequency as the moving status value representing the status of the slide mechanism 13 will be described later with reference to FIG. 6.

[0018] The control device 20 controls the operation of the seat 10 configured as described above, and is configured with a calculation device and a storage device. As shown in Fig. 1, the control device 20 includes an operation reception unit 21, a detection unit 22, a determination unit 23, and a drive control unit 24. The functions of the operation reception unit 21, the detection unit 22, the determination unit 23, and the drive control unit 24 can be realized by the calculation device executing a program for realizing each function stored in the storage device. The control device 20 also includes a judgment criterion storage unit 25. The judgment criterion storage unit 25 is configured with a storage device.

[0019] The operation reception unit 21 receives an operation command for the seat 10 from an operator such as a driver via the operation unit 12. In particular, in this embodiment, the operation reception unit 21 receives a movement operation command for the seat main body 11 in the front-rear direction. The operation reception unit 21 then notifies the drive control unit 24 of the received movement operation command for the seat main body 11 in the front-rear direction. In response to this, the drive control unit 24 controls the drive of the drive device 14 of the seat 10 so as to slide the seat main body 11 in the front-rear direction.

[0020] The detection unit 22 acquires a load value applied to the slide mechanism 13 detected by the load detection device 15. Here, the detection unit 22 acquires a load value indicated by a driving force as shown in FIG. 4. As described above, the load value is the driving force of the drive device 14 calculated from the voltage value and current value applied to the drive device 14, and therefore the value increases as the load applied to the slide mechanism 13 in the longitudinal direction of the vehicle increases. However, the detection unit 22 is not limited to the above-described load value, and may acquire any movable status value that indicates the status of the slide mechanism 13 that moves the seat body 11 in the longitudinal direction, detected by the load detection device 15.

[0021] The determination unit 23 determines whether or not pinching has occurred while the seat main body 11 is moving in the front-rear direction based on the detected load value. In particular, in this embodiment, pinching is detected while the seat main body 11 is moving rearward. Specifically, as shown in FIG. 4, the determination unit 23 determines that pinching has occurred when the detected load value exceeds a preset first threshold value A1 (first state) and when it is less than a second threshold value A2 that is set to a value lower than the first threshold value A1 (second state).

[0022] Here, the setting of the first threshold value A1 and the second threshold value A2 as the reference values ​​for determining whether pinching has occurred based on the load value detected from the slide mechanism 13 by the determination unit 23 will be described with reference to FIGS. 2 to 4. First, FIG. 2 shows the operation of the rack and pinion, which is the slide mechanism 13, when no load is applied to the seat body 11 in the fore-and-aft direction, such as when the vehicle is traveling on a flat surface. The left diagram of FIG. 2 shows the rack and pinion when the seat body 11 is being moved rearward, and the right diagram of FIG. 2 shows the rack and pinion when pinching occurs while the seat body 11 is being moved rearward. As shown in the right diagram of FIG. 2, when pinching occurs while the seat body 11 is being moved rearward, a load is applied that inhibits rotation of the pinion, and the driving force of the motor, which is the drive device 14 that drives the pinion, i.e., the load value of the slide mechanism 13, increases. Therefore, by detecting the increase in the load value shown in FIG. 4, it is possible to determine whether pinching has occurred. As a result, by setting a value that starts to increase when pinching occurs as the first threshold A1, it is possible to determine that pinching has occurred when the load value exceeds the first threshold A1. Note that the first threshold is a value set by an experiment or the like, and is stored in advance in the determination criterion storage unit 25.

[0023] FIG. 3 also shows the operation of the rack and pinion, which is the sliding mechanism 13, when a rearward load is applied to the seat body 11, such as when the vehicle is traveling on a slope that slopes upward in the direction of travel. The left diagram of FIG. 3 shows the rack and pinion when the seat body 11 is being moved rearward, and the center diagram of FIG. 3 shows the rack and pinion when pinching occurs while the seat body 11 is being moved rearward. The right diagram of FIG. 3 shows the rack and pinion when pinching, which occurred while the seat body 11 was being moved rearward, continues. The right diagram of FIG. 3 is identical to the right diagram of FIG. 2 described above, i.e., the rack and pinion when pinching occurs when no load is being applied to the seat body 11 in the fore-and-aft direction. Therefore, when a rearward load is applied to the vehicle, the load value corresponding to the situation shown in the right diagram of FIG. 3 exceeds the first threshold A1 at time T1 in FIG. 4, resulting in a problem of delayed timing for determining that pinching has occurred.

[0024] For this reason, in this embodiment, it is desirable to detect the rack-and-pinion situation shown in the center diagram of FIG. 3 from the load value. In this rack-and-pinion situation shown in the center diagram of FIG. 3, the load on the pinion rotation is reduced compared to the situation shown in the left diagram of FIG. 3. This reduces the driving force of the motor (drive unit 14) that drives the pinion, i.e., the load value of the slide mechanism 13. Therefore, by detecting the decrease in the load value detected after time T2 in FIG. 4, it is possible to determine whether or not a pinch has occurred. As a result, by setting the second threshold value A2 as a value that starts to decrease when a pinch has occurred in a situation where a rear load is applied to the vehicle, it is possible to determine that a pinch has occurred when the load value falls below the second threshold value A2. The second threshold value A2 is lower than the first threshold value A1, is a value set through experiments, or the like, and is stored in advance in the determination criterion storage unit 25. The first threshold value A1 and the second threshold value A2 are set according to the movement status value representing the status of the slide mechanism 13 acquired by the detection unit 22.

[0025] The determination unit 23 may perform the determination based on the load value described above in response to a load acting on the seat 10 in the longitudinal direction of the vehicle. To achieve this function, the detection unit 22 (load detection unit) described above also has a function of detecting a load acting on the seat 10 in the longitudinal direction of the vehicle based on measurements taken by the load detection device 30. The load detection device 30 may include, for example, an inclination sensor that measures the inclination of the vehicle, an acceleration sensor that measures the acceleration of the vehicle, and a strain sensor that measures the load acting on the seat main body 11, and detects the load in the longitudinal direction of the seat 10 from these measurement values. In other words, the detection unit 22 not only measures the longitudinal load caused by the vehicle being in an inclined state from each sensor, but also detects a load caused by acceleration and a load caused by the seat main body 11 being pushed by an occupant. In this embodiment, as an example, the rearward load is measured to detect that the vehicle is in an inclined state on an uphill slope. An example of the detected load is shown in the graph indicated by reference symbol G2 in FIG. 5. In FIG. 5, the graph with the symbol G1 represents the load value described above, and is the same as the graph in FIG.

[0026] The detection unit 22 detects the load state of the vehicle from a graph of the detected load, as indicated by reference symbol G2 in FIG. 5. For example, when the load is 0, the detection unit 22 determines that the load is less than a preset reference and detects that the vehicle is in a state where no rear load is applied (first load state). Furthermore, when the load exceeds 0 after time T3 in FIG. 5, the detection unit 22 determines that the applied load is equal to or greater than a preset reference and detects that the vehicle is in a state where a rear load is applied (second load state). However, the detection unit 22 may determine the load state based on another value. Furthermore, the detection unit 22 may further detect the rear load state (second load state) in multiple stages depending on the load value, and may, for example, detect a load state that requires correction by the determination unit 23, as described below.

[0027] Then, the determination unit 23 determines whether or not an entrapment has occurred based on the load value in accordance with the load state of the vehicle detected as described above. For example, the determination unit 23 may determine only whether or not the load value has exceeded the first threshold value when no rear load is applied to the vehicle, and may determine only whether or not the load value is less than the second threshold value when a rear load is applied to the vehicle.

[0028] When the vehicle load state is the rearward load state as described above and a correction is required, the determination unit 23 may correct the second threshold value according to the value of the load. That is, since the load acting on the seat main body 11 may vary depending on the tilt angle of the location where the vehicle is traveling and the weight of the occupant, the determination unit 23 corrects the second threshold value A2 taking such variations into consideration. For example, the determination unit 23 may correct the second threshold value so that the higher the load, the lower the second threshold value.

[0029] The drive control unit 24 controls the drive device 14 of the seat 10 to slide the seat body 11 in the front-rear direction in response to an operation by the operator. However, when it is determined that entrapment has occurred in the seat body 11 as described above, that is, when the detected load value exceeds the first threshold value A1 (first state) or becomes less than the second threshold value A2 (second state), the drive control unit 24 controls the drive device 14 to reverse the direction of movement of the seat body 11 or stop the movement, respectively.

[0030] Here, a case will be described in which the load detection device 15 and the detection unit 22 (detection unit) detect the pulse frequency of the motor, which is the drive device 14, as a movement status value representing the status of the slide mechanism 13, instead of detecting the load value of the slide mechanism 13 described above. For example, the pulse frequency of the motor is graph G3 shown on the vertical axis in Fig. 6. It can also be said that the pulse frequency of the motor represents the movement speed of the seat main body 11 in the front-rear direction.

[0031] First, when pinching occurs while the seat body 11 is being moved backward as shown in the right diagram of FIG. 2, the rotation of the pinion 13a is inhibited, and the pulse frequency (movement speed) of the motor is reduced. Therefore, the determination unit 23 can determine whether pinching has occurred by detecting a decrease in the pulse frequency as shown in FIG. 6. As a result, by setting a value at which pinching begins to disappear as a first threshold value B1, it is possible to determine that pinching has occurred when the pulse frequency becomes less than the first threshold value B1 as shown at time t1 in FIG. 6. The first threshold value B1 is a value determined through experiments or the like and is stored in advance in the determination criterion storage unit 25.

[0032] On the other hand, if pinching occurs while the seat body 11 is being moved backward as shown in the center of FIG. 3 from a situation where a rearward load is applied to the seat body 11, such as when the vehicle is traveling on a slope that slopes upward toward the vehicle's direction of travel as shown in the left diagram of FIG. 3, the rotation of the pinion 13a is temporarily accelerated, and the pulse frequency (movement speed) increases. Therefore, the determination unit 23 can determine whether pinching has occurred by detecting an increase in the pulse frequency as shown after time t2 in FIG. 6. As a result, by setting a value that starts to increase when pinching occurs in a situation where a rearward load is applied to the vehicle as the second threshold B2, it is possible to determine that pinching has occurred when the pulse frequency exceeds the second threshold B2. The second threshold B2 is a value higher than the first threshold B1, set through experiments, or the like, and stored in advance in the determination criterion storage unit 25.

[0033] The determination unit 23 may make the determination based on the pulse frequency described above depending on the load acting on the seat 10 in the longitudinal direction of the vehicle. That is, the determination unit 23 may detect the load acting on the seat 10 in the longitudinal direction of the vehicle in the same manner as described above, and determine only whether the pulse frequency is less than the first threshold value B1 when no rear load is applied to the vehicle, and may determine only whether the pulse frequency exceeds the second threshold value B2 when a rear load is applied to the vehicle. Furthermore, when the vehicle is in a rear loaded state and a correction is required, the determination unit 23 may correct the second threshold value B2 depending on the value of the load in the same manner as described above.

[0034] [Operation] Next, the operation of the seat 10 and the control device 20 will be described mainly with reference to the flowchart in Fig. 7. Here, the case where the driving force of the motor serving as the drive device 14, i.e., the load value applied to the slide mechanism 13, is detected as the movable state value representing the state of the slide mechanism 13, as shown in Fig. 4, will be described.

[0035] First, when the operating unit 12 of the seat 10 is operated by the operator, the control device 20 receives the operation command and controls the seat body 11 to move in the operated direction (step S1). Here, the control device 20 controls the seat body 11 to move rearward. Then, the control device 20 starts detecting the load value applied to the slide mechanism 13 that drives the seat body 11 from the load detection device 15 and detecting the load applied to the seat body 11 from the load detection device 30 (step S2).

[0036] Next, the control device 20 detects the load state on the seat main body 11 from the detected load (step S3). Specifically, the control device 20 detects whether or not a rear load is being applied to the seat main body 11, and if no rear load is being applied, detects that the vehicle is not in a tilted state, and if a rear load is being applied, detects that the vehicle is in a tilted state. Then, the control device 20 detects pinching of the seat main body 11 from the load value detected as follows, depending on whether or not the vehicle is in a tilted state.

[0037] When the control device 20 detects that the vehicle is not in a tilted state (No in step S4), it checks whether the detected load value exceeds a first threshold value A1 (step S5). At this time, if the load value exceeds the first threshold value A1 (Yes in step S5), it determines that entrapment has occurred in the seat main body 11 (step S7). On the other hand, when the control device 20 detects that the vehicle is in a tilted state (Yes in step S4), it checks whether the detected load value is less than a second threshold value A2 (step S6). At this time, if the load value is less than the second threshold value A2 (Yes in step S6), it determines that entrapment has occurred in the seat main body 11 (step S7).

[0038] When the control device 20 determines that entrapment has occurred in the seat main body 11 as described above, it controls the seat main body 11 to reverse the movement direction, that is, to change the backward movement to a forward movement, or to stop the movement (step S8).

[0039] As described above, the seat state detection device of the present invention can accurately detect pinching by the seat body 11 even when a load is applied to the seat body 11, for example, when the vehicle is in an inclined state.

[0040] <Additional Notes> A part or all of the above-described embodiments can be described as follows: An outline of the operating device of the present invention will be described below. However, the present invention is not limited to the following configuration. (Appendix 1) a detection unit that detects a movement status value that indicates a status of a movement mechanism that moves the seat in the forward and backward directions in response to a movement operation of the seat in the forward and backward directions by an operator; a determination unit that determines a first state when the detected mobility status value exceeds a first threshold, and determines a second state when the detected mobility status value falls below a second threshold that is set to a value lower than the first threshold; A seat state detection device comprising: (Appendix 2) 10. The seat state detection device according to claim 1, the detection unit detects a load value applied to the movable mechanism as the movable status value, The determination unit determines that the detected load value is in the first state when it exceeds the first threshold value, and determines that the detected load value is in the second state when it is less than the second threshold value. Seat condition detection device. (Appendix 3) 3. The seat state detection device according to claim 2, the detection unit detects the load value, which increases as the load applied to the movable mechanism in the front-rear direction of the vehicle increases. Seat condition detection device. (Appendix 4) 4. The seat state detection device according to claim 3, a load detection unit that detects a load acting on the seat in the front-rear direction of the vehicle; the determination unit determines that the second state exists when the mobility status value becomes less than the second threshold value in response to the detected load. Seat condition detection device. (Appendix 5) 5. The seat state detection device according to claim 4, the load detection unit detects whether the load is in a first load state determined to be less than a predetermined standard or a second load state determined to be equal to or greater than a predetermined standard; When the determination unit detects that the first load state is present, it checks whether the movable state value exceeds the first threshold value to determine whether the first state is present, and when the determination unit detects that the second load state is present, it checks whether the movable state value is below the second threshold value to determine whether the second state is present. Seat condition detection device. (Appendix 6) 5. The seat state detection device according to claim 4, the determination unit performs a predetermined correction on the second threshold value in accordance with the load, and performs determination using the corrected second threshold value. Seat condition detection device. (Appendix 7) 7. The seat state detection device according to claim 5 or 6, the determination unit determines that the sheet is pinched when determining that the first state and the second state exist; Seat condition detection device. (Appendix 8) 8. The seat state detection device according to claim 7, the movable mechanism is operable to reverse the direction of movement of the seat or to stop the movement of the seat when the first state or the second state is determined. Seat condition detection device. (Appendix 9) detecting a movement status value representing a status of a movement mechanism that moves the seat in the forward and backward directions in response to a movement operation of the seat in the forward and backward directions by an operator; When the detected mobility status value exceeds a first threshold, the state is determined to be a first state, and when the detected mobility status value falls below a second threshold that is set to a value lower than the first threshold, the state is determined to be a second state. Seat condition detection method. (Appendix 10) a detection unit that detects a movement status value that indicates a status of a movement mechanism that moves the seat in the forward and backward directions in response to a movement operation of the seat in the forward and backward directions by an operator; a determination unit that determines a first state when the detected mobility status value is less than a first threshold value, and determines a second state when the detected mobility status value exceeds a second threshold value that is set to a value higher than the first threshold value; A seat state detection device comprising:

[0041] Although the present invention has been described above with reference to the above-mentioned embodiments, the present invention is not limited to the above-mentioned embodiments. Various modifications that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention. [Explanation of symbols]

[0042] 10 sheets 11 Seat body 12 Control section 13 Movable mechanism 14 Drive unit 15 Load detection device 20 Control device 21 Operation reception section 22 Detection unit 23 Judgment section 24 Drive control unit 25 Judgment criteria storage section 30 Load detection device

Claims

1. a detection unit that detects a movement status value that indicates a movement status in the front-rear direction of a movement mechanism that moves a seat in the front-rear direction in response to a movement operation in the front-rear direction by an operator of the vehicle seat; a determination unit that determines a first state when the detected mobility status value exceeds a first threshold, and determines a second state when the detected mobility status value falls below a second threshold that is set to a value lower than the first threshold; A seat state detection device comprising:

2. The seat state detection device according to claim 1, the detection unit detects a load value applied to the movable mechanism in the front-rear direction as the movable status value, The determination unit determines that the detected load value is in the first state when it exceeds the first threshold value, and determines that the detected load value is in the second state when it is less than the second threshold value. Seat condition detection device.

3. The seat state detection device according to claim 2, the detection unit detects the load value, which increases as the load applied to the movable mechanism in the front-rear direction of the vehicle increases, on a flat surface. Seat condition detection device.

4. The seat state detection device according to claim 3, a load detection unit that detects a load acting on the seat in the front-rear direction of the vehicle; the determination unit determines that the second state exists when the mobility status value becomes less than the second threshold value in response to the detected load. Seat condition detection device.

5. The seat state detection device according to claim 4, the load detection unit detects whether the load is in a first load state determined to be less than a predetermined standard or a second load state determined to be equal to or greater than a predetermined standard; When the determination unit detects that the first load state is present, it checks whether the movable state value exceeds the first threshold value to determine whether the first state is present, and when the determination unit detects that the second load state is present, it checks whether the movable state value is below the second threshold value to determine whether the second state is present. Seat condition detection device.

6. The seat state detection device according to claim 4, the determination unit performs a predetermined correction on the second threshold value in accordance with the load, and performs determination using the corrected second threshold value. Seat condition detection device.

7. The seat state detection device according to claim 5 or 6, The determination unit determines that the sheet is pinched when determining that the sheet is in the first state or the second state. Seat condition detection device.

8. The seat state detection device according to claim 7, the movable mechanism is operable to reverse the direction of movement of the seat or to stop the movement of the seat when the first state or the second state is determined. Seat condition detection device.

9. detecting a movement status value representing a movement status in the front-rear direction of a movement mechanism that moves the seat in the front-rear direction in response to a movement operation in the front-rear direction by an operator with respect to the vehicle seat; When the detected mobility status value exceeds a first threshold, the state is determined to be a first state, and when the detected mobility status value falls below a second threshold that is set to a value lower than the first threshold, the state is determined to be a second state. Seat condition detection method.

10. a detection unit that detects a movement status value that indicates a movement status in the front-rear direction of a movement mechanism that moves a seat in the front-rear direction in response to a movement operation in the front-rear direction by an operator of the vehicle seat; a determination unit that determines a first state when the detected mobility status value is less than a first threshold value, and determines a second state when the detected mobility status value exceeds a second threshold value that is set to a value higher than the first threshold value; A seat state detection device comprising:

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