JP2018055527A - Vibration control apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control apparatus that maintains or improves an awakening effect on vibration stimulation.SOLUTION: Based on a detection value of a heartbeat sensor 310, a control unit 320 detects a drowsiness or a careless state of a user. A vibration unit 20 is disposed on a seat 10 and generates vibrations. When the control unit 320 detects the drowsiness or the careless state of the user, the control unit 320 is controlled to sequentially output a plurality of vibration patterns. At least one of frequency and amplitude is different between output patterns of adjacent vibration patterns.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vibration control device, a vibration control method, and a vibration control program.

  Conventionally, there has been proposed a driving support device that vibrates a driver's seat with a vibration generating device in order to wake up the driver when the level of sleepiness of the driver exceeds a predetermined threshold (Patent Document 1).

  Patent Document 1 does not describe how to generate vibration applied to the driver. Assuming that a constant vibration is continuously applied to the driver, the driver gradually feels resistance and familiarity with the vibration, and the awakening effect on the vibration stimulus is reduced as an example.

JP2013-152679A

  This invention makes it an example of a subject to cope with such a problem. That is, an object of the present invention is to provide, for example, a vibration control device that maintains or improves the awakening effect on vibration stimulation.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a detection means for detecting a user's sleepiness or sloppy state, a vibration generating means disposed on a seat and generating a vibration, and the user's sleepiness or Control means for controlling the vibration generating means so that a plurality of vibration patterns are sequentially output when a random state is detected, and at least one of frequency and amplitude differs between the vibration patterns whose output orders are adjacent to each other It is characterized by that.

  According to a sixth aspect of the present invention, there is provided a vibration control method comprising: a detecting step for detecting a user's drowsiness or muddy state; and a plurality of vibration patterns are sequentially output when the user's drowsiness or muddy state is detected. And a vibration control unit for controlling the vibration generating means provided, wherein the vibration patterns adjacent in output order are different in at least one of frequency and amplitude.

It is a block diagram of a seat device concerning one example of the present invention. It is a perspective view of the seat which comprises the seat apparatus shown in FIG. It is a perspective view which shows the vibration unit shown by FIG. FIG. 4 is a cross-sectional view showing a cross section taken along the cutting line V1-V1 in FIG. It is a schematic diagram which shows a mode that the vibration unit is incorporated in the backrest part and the seating part. It is a time chart which shows an example of the drive signal output to a vibration unit from the control part shown in FIG. It is a time chart which shows an example of the drive signal output to a vibration unit from the control part shown in FIG. It is a time chart which shows an example of the drive signal output to a vibration unit from the control part shown in FIG.

  Hereinafter, a vibration control device according to an embodiment of the present invention will be described. The vibration control device includes: a detecting unit that detects a user's drowsiness or a sloppy state; a vibration generating unit that is disposed on the seat and generates a vibration; Control means for controlling the vibration generating means to output sequentially, and the vibration patterns adjacent to each other in output order are different in at least one of frequency and amplitude.

  Accordingly, a plurality of vibration patterns are sequentially output, and at least one of the frequencies and amplitudes of the vibration patterns adjacent to each other is different, so that the awakening effect on the vibration stimulus can be maintained or improved.

  In addition, vibration patterns with adjacent output orders may have different vibration durations. Thereby, the awakening effect with respect to the vibration stimulus can be further maintained or improved.

  The vibration pattern may be set to a pause time until the next output vibration pattern, and the plurality of pause times may be set to a plurality of different times. Thereby, the awakening effect with respect to the vibration stimulus can be further maintained or improved.

  Further, a plurality of vibration generating means may be provided.

  Further, at least one set of the plurality of vibration generating means may be configured such that the plurality of vibration patterns to be output are different from each other. Thereby, the awakening effect with respect to the vibration stimulus can be further maintained or improved.

  Further, the plurality of vibration patterns are changed every time the user is seated on the seat, or whenever the user's drowsiness or casual state is detected.

  The seat may be a seat mounted on a vehicle.

  The vibration control method according to an embodiment of the present invention includes a detection step of detecting a user's drowsiness or a sloppy state, and a plurality of vibration patterns are sequentially output when the user's drowsiness or a sloppy state is detected. And a control step for controlling the vibration generating means disposed on the seat, and the vibration patterns adjacent to each other in output order are different in at least one of frequency and amplitude. Accordingly, a plurality of vibration patterns are sequentially output, and at least one of the frequencies and amplitudes of the vibration patterns adjacent to each other is different, so that the awakening effect on the vibration stimulus can be maintained or improved.

  Moreover, it is good also as a vibration control program which performs the vibration control method mentioned above by computer. This eliminates the need for dedicated hardware and allows a general-purpose information processing apparatus to be installed and functioned.

  Hereinafter, a seat device incorporating a vibration control device according to an embodiment of the present invention will be described.

  FIG. 1 is a block diagram of a seat device incorporating a vibration control device according to an embodiment of the present invention. 2 is a perspective view of a seat constituting the seat device shown in FIG. The seat device 1 shown in FIGS. 1 and 2 is a seat device used for a driver's seat of a vehicle. The seat device 1 includes a seat 10 as a seat, a vibration unit 20 as vibration generating means built in four places of the seat 10, and a control device 30 as control means for controlling the vibration unit 20. Yes. The seat 10 has a seating part 11 and a backrest part 12. The seating unit 11 has a built-in vibration unit 20 on each of the left and right sides of the center in the left-right direction. The backrest portion 12 also includes one vibration unit 20 on each of the left and right sides of the center in the left-right direction.

  FIG. 3 is a perspective view showing the vibration unit shown in FIG. 1, and FIG. 4 is a cross-sectional view showing a cross section taken along the line V1-V1 in FIG.

  The vibration unit 20 is one in which a magnetic circuit 220 is accommodated in a case 210. In the case 210, the opening on one end side of the short cylindrical frame 211 is closed by a circular first plate wall 213 in which a plurality of through holes 212 are provided in the center, and the opening on the other end side is a circular second. It is blocked by the plate wall 214. FIG. 3A shows the vibration unit 20 viewed from the first plate wall 213 side where the through-hole 212 is provided, and FIG. 3B shows the vibration unit 20 viewed from the opposite side. ing.

  A cylindrical bobbin 215 is erected from the approximate center of the first plate wall 213 toward the second plate wall 214 so as to surround the plurality of through holes 212, and a voice coil 216 is provided on the outer periphery of the bobbin 215. ing. As described above, the voice coil 216 is fixed to the first plate wall 213 via the bobbin 215. The plurality of through holes 212 are provided in a region 213 a corresponding to the inside of the voice coil 216 in a plan view when viewed from a direction intersecting the first plate wall 213.

  Each of the magnetic circuits 220 includes a ring-shaped plate 221 and a magnet 222 and a disk-shaped yoke 223. The plate 221 and the magnet 222 are arranged coaxially with a gap with respect to the voice coil 216. The plate 221, that is, the magnetic circuit 220 is supported on the inner wall surface of the cylindrical frame 211 via the damper 230 so as to vibrate in the contact / separation direction D <b> 1 with respect to the first plate wall 213.

  When an AC signal is applied to the voice coil 216, the magnetic circuit 220 vibrates in the contact / separation direction D1 with respect to the first plate wall 213. Further, the case 210 also vibrates due to the reaction through the vibration damper 230. As described above, in the vibration unit 20, relative vibration is generated between the case 210 and the magnetic circuit 220 by energizing the voice coil 216. Due to this relative vibration, the vibration unit 20 vibrates together with the case 210. Further, in the case 210, the first plate wall 213 to which the voice coil 216 that receives the reaction from the magnetic circuit 220 is fixed vibrates locally. Sound is generated by the vibration of the first plate wall 213. As described above, the vibration unit 20 vibrates and emits sound along with the case 210 due to relative vibration between the case 210 and the magnetic circuit 220 caused by energization of the voice coil 216.

  In this embodiment, such a vibration unit 20 is built in the backrest 12 and the seat 11 as follows.

  FIG. 5 is a schematic diagram illustrating a state in which the vibration unit 20 is built in the backrest 12 and the seat 11. 5A shows a state in which the vibration unit 20 is built in the backrest portion 12, and FIG. 5B shows a state in which the vibration unit 20 is built in the seating portion 11. ing.

  As shown in FIG. 5A, the vibration unit 20 is built in the backrest 12 so that the first plate wall 213 of the case 210 faces the seated person (user) side. That is, the first plate wall 213 that emits sound as described above faces the seated person. On the other hand, the vibration unit 20 is incorporated in the seating portion 11 so that the second plate wall 214 of the case 210 faces the seated person side, that is, the first plate wall 213 that emits a sound faces the opposite side to the seated person side. Has been.

  Here, in the seat device 1 of the present embodiment, for example, when the seated person who is the driver is dozing or driving freely, the control of notifying the fact using the vibration unit 20 is shown in FIG. This is performed by the control device 30 shown.

  The control device 30 includes a heart rate sensor 310, a control unit (= output unit) 320 that outputs a signal for driving the vibration unit 20, and an amplifier 330.

  The heartbeat sensor 310 is worn by a seated person, detects the heartbeat of the seated person, and supplies it to the control unit 320.

  The control unit 320 includes a CPU (Central Processing Unit) having a scale such as a RAM (Random Access Memory) and a ROM (Read Only Memory). The control unit 320 controls the seat apparatus 1 as a whole, and outputs a driving signal for driving the vibration unit 20 when detecting drowsiness or a casual state based on the detection result of the heart rate sensor 310. In addition, the control unit 320 does not output a drive signal for driving the vibration unit 20 unless drowsiness or a sloppy state is detected. The amplifier 330 amplifies the signal output from the control unit 320 and supplies the amplified signal to the voice coils 216 of the four vibration units 20. In addition, the state of ambiguity includes not only a state of thinking or being vague, but also a state in which the physical condition is poor and the driver cannot concentrate on driving and the driving itself is difficult.

  A vibration pattern table as shown in Table 1 below is stored in a memory such as a ROM in the control unit 320.

  The vibration pattern table shown in Table 1 has a plurality of vibration patterns P1 to P15. Reproduction time (vibration duration), frequency, and gain (amplitude) are set for each of the vibration patterns P1 to P15. In addition, in the vibration patterns P1 to P14 excluding the last vibration pattern P15, pause times until the next vibration patterns P2 to P14 are set. The control unit 320 of the present embodiment sequentially outputs drive signals according to the vibration patterns P <b> 1 to P <b> 15 to the vibration unit 20.

  More specifically, when the control unit 320 detects drowsiness or a casual state, as shown in FIG. 6, referring to the top row of Table 1, the control unit 320 generates a drive signal having a frequency of 200 kHz and a gain of 5.2 dB for a reproduction time of 7 s. The signal is continuously output, and then the drive signal output is stopped for a pause time of 3 s. As a result, the drive signal of the vibration pattern P1 is output from the control unit 320. When the pause time 3s elapses, the control unit 320 continuously outputs a drive signal having a frequency of 40 Hz and a gain of 5.1 dB for a reproduction time of 10 seconds, and then stops outputting the drive signal for a pause time of 6 seconds. Thereby, the drive signal of the vibration pattern P2 is output from the control unit 320. Hereinafter, this is repeated, and the control unit 320 sequentially outputs drive signals of the vibration patterns P1 to P15.

  As shown in Table 1 above, the vibration patterns P1 to P15 whose output orders are adjacent are greatly different in at least one of frequency and gain. For example, the vibration patterns P1 and P2 that are adjacent to each other in output order are different in both frequency and gain, and particularly in frequency. Further, the vibration patterns P4 and P5 that are adjacent in the output order have the same frequency but different gains. Further, the vibration patterns P11 and P12 that are adjacent in the output order have the same gain, but have different frequencies.

  In addition, the reproduction times of the vibration patterns P1 to P15 whose output orders are adjacent to each other are different. In addition, a plurality of different times are set as pause times corresponding to the plurality of vibration patterns P1 to P14. In this embodiment, seven different times of 3s, 4s, 6s, 7s, 8s, 9s, and 10s are set.

  According to the above-described embodiment, the vibration patterns P1 to P15 whose output orders are adjacent differ in at least one of frequency and amplitude. Thereby, since a plurality of vibration patterns P1 to P15 having different frequencies or amplitudes are sequentially output, it is possible to maintain or improve the awakening effect on the vibration stimulus.

  Further, according to the above-described embodiment, the reproduction times of the vibration patterns P1 to P15 whose output orders are adjacent to each other are different. Thereby, the awakening effect with respect to the vibration stimulus can be further maintained or improved.

  Further, according to the above-described embodiment, the pause times corresponding to the vibration patterns P2 to P15 to be output next are set in the plurality of vibration patterns P1 to P14, respectively, and the pauses corresponding to the plurality of vibration patterns P1 to P14 are set. As the time, a plurality of different times are set. Thereby, the awakening effect with respect to the vibration stimulus can be further maintained or improved.

  According to the above-described embodiment, the vibration patterns P1 to P15 that are adjacent in the output order have different reproduction times. However, the present invention is not limited to this. The reproduction times of the vibration patterns P1 to P15 may all be the same.

  Moreover, according to the Example mentioned above, although several different time was set as the rest time corresponding to several vibration pattern P1-P14, it is not restricted to this. As the rest time, the same time may be set for all.

  Moreover, according to the Example mentioned above, although the control part 320 output the vibration patterns P1-P14 in the predetermined order, it is not restricted to this. For example, the vibration patterns P1 to P15 may be randomly output by using a random number generator.

  Two vibration pattern tables, a first vibration pattern table and a second vibration pattern table, may be prepared. In this case, each of the vibration patterns constituting the first vibration pattern table is different from each of the vibration patterns constituting the second vibration pattern table so that at least one of amplitude or gain is greatly different. And after outputting the vibration pattern selected at random from the 1st vibration pattern table, the vibration pattern selected at random from the 2nd vibration pattern table is output. Thereafter, a vibration pattern randomly selected from the first vibration pattern table may be output again, and this may be repeated. As described above, by alternately outputting the vibration patterns from the first and second vibration pattern tables, it is possible to greatly vary the vibration patterns in which the output order is adjacent even if the vibration patterns are output at random.

  Further, according to the above-described embodiment, the vibration continuous for the reproduction time is set as one vibration pattern. However, the present invention is not limited to this. For example, as shown in FIG. 7, for example, intermittent vibration may be a single vibration pattern. As shown in the figure, the control unit 320 intermittently outputs drive signals having frequencies and gains stored in the vibration pattern table during the reproduction time. Of course, as shown in FIG. 8, a vibration pattern that continues for the reproduction time may be combined with a vibration pattern that is output intermittently during the reproduction time.

  Further, according to the above-described embodiment, the same drive signal is supplied to the plurality of vibration units 20, but the present invention is not limited to this. For example, a plurality of vibration patterns P <b> 1 to P <b> 15 may be alternately output to the vibration unit 20 provided in the backrest portion 12 and the vibration unit 20 provided in the seating portion 11. More specifically, after the drive signal of the vibration pattern P1 is output to the vibration unit 20 provided in the backrest part 12, the drive signal of the vibration pattern P2 is output to the vibration unit 20 provided in the seating part 11. . Thereafter, the drive signal of the vibration pattern P3 is output to the vibration unit 20 provided in the backrest 12 again, and this is repeated thereafter.

  Further, at least one set of the plurality of vibration units 20 may have a plurality of vibration patterns to be output different from each other. For example, the plurality of vibration patterns output from the two vibration units 20 provided in the backrest part 12 are the same, and the plurality of vibration patterns output from the two vibration units 20 provided in the seating part 11 are the same. The plurality of vibration patterns output from the vibration unit 20 provided on the backrest 12 may be different from the plurality of vibration patterns output from the two vibration units 20 provided on the seating portion 11.

  In this case, different backrest vibration pattern tables and seating part vibration pattern tables are prepared. Then, a plurality of vibration patterns corresponding to the backrest vibration pattern table are sequentially output to the vibration unit 20 provided in the backrest portion 12, and a vibration pattern table for seating portion is provided in the vibration unit 20 provided in the seating portion 11. According to the above, a plurality of vibration patterns may be output sequentially. In this case, the vibration pattern table for the backrest and the vibration pattern table for the seating part may not be the same in all the vibration patterns and the output order of the vibration patterns, and may partially adopt the same vibration pattern. . Even if all the vibration patterns are the same, the output order may be different. Further, the plurality of vibration patterns output from the four vibration units 20 may be different from each other.

  In addition, the control unit 320 may change the vibration pattern table every time the seated person is seated on the seat, or every time a sleepiness or a muddy state is detected. In this case, for example, a plurality of different vibration pattern tables are prepared. And the control part 320 switches a vibration pattern table, whenever a seated person sits on a sheet | seat or a drowsiness or a vulgar state is detected. Thus, each time the seated person sits on the seat, or every time drowsiness or sloppy state is detected, a plurality of vibration patterns can be changed.

  In addition, every time the seated person sits on the seat, or every time a drowsiness or sloppy state is detected, the control unit 320 vibrates a pattern in which vibration patterns P1 to P15 are randomly output by using a random number generator or the like. You may make it produce | generate as a pattern table.

  Further, according to the above-described embodiment, the drowsiness or the sloppy state is detected by the output of the heart rate sensor 310, but the present invention is not limited to this. For example, you may make it detect a drowsiness or a casual state based on other biological information, such as a movement of an eyeball and a movement of a face. Further, drowsiness or a casual state may be detected by detecting a meandering operation based on a steering operation or a result of white line detection from an image taken by a camera mounted on a vehicle.

  The present invention is not limited to the above embodiment. That is, various modifications can be made without departing from the scope of the present invention.

10 seats
20 Vibration unit (vibration generating means)
320 Control unit (detection means, control means)

Claims (9)

Detection means for detecting a user's drowsiness or sensational state;
Vibration generating means disposed on the seat for generating vibration;
A control means for controlling the vibration generating means so that a plurality of vibration patterns are sequentially output when the user's drowsiness or sloppy state is detected, and
The vibration control apparatus according to claim 1, wherein the vibration patterns adjacent to each other in output order are different in at least one of frequency and amplitude.   The vibration control apparatus according to claim 1, wherein the vibration patterns having adjacent output orders have different durations of the vibration. In the vibration pattern, a pause time until the vibration pattern to be output next is set,
The vibration control apparatus according to claim 1, wherein a plurality of different times are set as the plurality of pause times.   The vibration control apparatus according to claim 1, wherein a plurality of the vibration generating means are provided.   The vibration control apparatus according to claim 4, wherein at least one set of the plurality of vibration generating units has a plurality of vibration patterns to be output different from each other.   6. The plurality of vibration patterns are changed every time the user is seated on the seat, or every time when the user's drowsiness or casual state is detected. The vibration control apparatus as described.   The vibration control device according to claim 1, wherein the seat is a seat mounted on a vehicle. A detection step for detecting a user's drowsiness or sensational state;
A control step of controlling the vibration generating means disposed on the seat so that a plurality of vibration patterns are sequentially output when the user's drowsiness or sloppy state is detected, and
The vibration control method according to claim 1, wherein at least one of a frequency and an amplitude is different between the vibration patterns adjacent in output order.   A vibration control program that causes a computer to execute the vibration control method according to claim 8.

Images