JP6876400B2 - Vibration control device - Google Patents

Description

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

Conventionally, a driving support device has been proposed in which a driver's seat is vibrated by a vibration generator in order to awaken the driver when the level of drowsiness of the driver exceeds a predetermined threshold value (Patent Document 1).

Patent Document 1 does not describe how to generate vibration applied to the driver. As an example, if the driver continues to be subjected to a constant vibration, the driver gradually feels tolerance and habituation to the vibration, and the awakening effect on the vibration stimulus is reduced.

Japanese Unexamined Patent Publication No. 2013-152679

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

The invention according to claim 1, which has been made to solve the above-mentioned problems, comprises a detecting means for detecting a drowsiness or a drowsiness of a user, a vibration generating means for generating vibrations arranged on a sheet, and the drowsiness of the user. Alternatively, when a loose state is detected, the vibration patterns are provided with a control means for controlling the vibration generation means so that a plurality of vibration patterns are sequentially output, and the vibration patterns having adjacent output orders have at least one of frequency and amplitude. It is characterized in that the duration of the vibration is different as well as different.

The vibration control method according to claim 7 is arranged on a sheet so that a detection step for detecting a user's drowsiness or drowsiness and a plurality of vibration patterns are sequentially output when the user's drowsiness or drowsiness is detected. The vibration pattern, which comprises a control step for controlling the provided vibration generating means and whose output orders are adjacent to each other, is characterized in that at least one of the frequency and the amplitude is different and the duration of the vibration is different.

It is a block diagram of the seat device which concerns on one Embodiment of this invention. It is a perspective view of the seat which constitutes the seat device shown in FIG. It is a perspective view which shows the vibration unit shown in FIG. It is sectional drawing which shows the cross section along the V1-V1 cutting line in FIG. 3A. It is a schematic diagram which shows the appearance that the vibration unit is built in the backrest part and the seating part. 6 is a time chart showing an example of a drive signal output from the control unit shown in FIG. 1 to the vibration unit. 6 is a time chart showing an example of a drive signal output from the control unit shown in FIG. 1 to the vibration unit. 6 is a time chart showing an example of a drive signal output from the control unit shown in FIG. 1 to the vibration unit.

Hereinafter, the vibration control device according to the embodiment of the present invention will be described. The vibration control device includes a detecting means for detecting the drowsiness or drowsiness of the user, a vibration generating means for generating vibrations arranged on the seat, and a plurality of vibration patterns when the drowsiness or drowsiness of the user is detected. The vibration patterns are provided with a control means for controlling the vibration generating means so as to be sequentially output, and the output orders are adjacent to each other, and at least one of the frequency and the amplitude is different.

As a result, 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 in the output order, so that the awakening effect on the vibration stimulus can be maintained or improved.

Further, the vibration patterns in which the output orders are adjacent to each other may have different vibration durations. Thereby, the awakening effect on the vibration stimulus can be further maintained or improved.

Further, the vibration pattern may be set with a pause time until the next output vibration pattern, and the plurality of pause times may be set with a plurality of different times. Thereby, the awakening effect on 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 have a plurality of output vibration patterns different from each other. Thereby, the awakening effect on the vibration stimulus can be further maintained or improved.

Further, the plurality of vibration patterns are changed each time the user sits on the seat, or each time the drowsiness or drowsiness state of the user is detected.

Further, the seat may be a seat mounted on a vehicle.

Further, in the vibration control method according to the embodiment of the present invention, a detection step for detecting the drowsiness or drowsiness of the user and a plurality of vibration patterns are sequentially output when the drowsiness or drowsiness of the user is detected. The vibration patterns are provided with a control step for controlling the vibration generating means arranged on the sheet, and the output orders are adjacent to each other, and at least one of the frequency and the amplitude is different. As a result, 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 in the output order, so that the awakening effect on the vibration stimulus can be maintained or improved.

Further, it may be a vibration control program in which the above-mentioned vibration control method is executed by a computer. This eliminates the need for dedicated hardware and the like, and a general-purpose information processing device can be installed and function.

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. FIG. 2 is a perspective view of the seats constituting the seating 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 or the like. The seat device 1 includes a seat 10 as a seat, a vibration unit 20 as a vibration generating means built in four places of the seat 10, and a control device 30 as a control means for controlling the vibration unit 20. There is. The seat 10 has a seating portion 11 and a backrest portion 12. The seating portion 11 has a built-in vibration unit 20 at one position on each side of the center in the left-right direction. The backrest portion 12 also has a built-in vibration unit 20 at one location on each side 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 along a V1-V1 cutting line in FIG. 3 (A).

The vibration unit 20 has a magnetic circuit 220 housed 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 provided with a plurality of through holes 212 in the center, and the opening on the other end side is a circular second. It is closed by a board wall 214. FIG. 3A shows the vibration unit 20 seen from the side of the first plate wall 213 provided with the through hole 212, and FIG. 3B shows the vibration unit 20 seen from the opposite side. ing.

A cylindrical bobbin 215 is erected from substantially the 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. In this way, the voice coil 216 is fixed to the first plate wall 213 via the bobbin 215. Further, the plurality of through holes 212 are provided in the region 213a corresponding to the inside of the voice coil 216 in a plan view when viewed from the direction intersecting the first plate wall 213.

The magnetic circuit 220 includes a ring-shaped plate 221 and a magnet 222, and a disk-shaped yoke 223, respectively. The plate 221 and the magnet 222 are arranged coaxially with respect to the voice coil 216 with a gap. The plate 221 or the magnetic circuit 220 is oscillatedly supported on the inner wall surface of the cylindrical frame 211 via the damper 230 in the contact / separation direction D1 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 of the vibration via the 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 receiving the reaction from the magnetic circuit 220 is fixed vibrates locally. Sound is generated by the vibration of the first plate wall 213. In this way, the vibration unit 20 vibrates together with the case 210 and emits sound due to the relative vibration of the case 210 and the magnetic circuit 220 due to the energization of the voice coil 216.

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

FIG. 5 is a schematic view showing how the vibration unit 20 is built in the backrest portion 12 and the seating portion 11. FIG. 5 (A) shows a state in which the vibration unit 20 is built in the backrest portion 12, and FIG. 5 (B) 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 portion 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 side. On the other hand, the seating portion 11 has a built-in vibration unit 20 so that the second plate wall 214 of the case 210 faces the seated side, that is, the first plate wall 213 that emits sound faces the side opposite to the seated side. Has been done.

Here, in the seat device 1 of the present embodiment, for example, when a seated driver, who is a driver, is driving asleep or indiscriminately, a control such as notifying the fact by using the vibration unit 20 is shown in FIG. It is performed by the control device 30 shown.

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

The heart rate sensor 310 is attached to the seated person, detects the heartbeat of the seated person, and supplies the heartbeat sensor 310 to the control unit 320.

The control unit 320 includes, for example, a CPU (Central Processing Unit) having a scale such as a RAM (Random Access Memory) or a ROM (Read Only Memory). The control unit 320 controls the entire seat device 1, and when it detects drowsiness or drowsiness based on the detection result of the heart rate sensor 310, it outputs a drive signal for driving the vibration unit 20. Further, the control unit 320 does not output a drive signal for driving the vibration unit 20 unless a drowsiness or a drowsiness state is detected. The amplifier 330 amplifies the signal output from the control unit 320 and supplies it to the voice coils 216 of the four vibration units 20. In addition to being thoughtful or absent-minded, the absent-minded state includes a state in which the driver is in poor physical condition and cannot concentrate on driving, and the driving itself is difficult.

Further, 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. The reproduction time (duration of vibration), frequency, and gain (amplitude) are set in the vibration patterns P1 to P15, respectively. Further, the vibration patterns P1 to P14 excluding the last vibration pattern P15 are set with pause times from the next vibration patterns P2 to P14. The control unit 320 of this embodiment sequentially outputs drive signals according to the vibration patterns P1 to P15 to the vibration unit 20.

Specifically, when the control unit 320 detects drowsiness or drowsiness, it refers to the uppermost stage of Table 1 and reproduces a drive signal having a frequency of 200 kHz and a gain of 5.2 dB for a reproduction time of 7 s, as shown in FIG. The output is continued, and then the output of the drive signal 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 of 3 s 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 s, and then stops outputting the drive signal for a pause time of 6 s. As a result, 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 the drive signals of the vibration patterns P1 to P15.

As shown in Table 1 above, the vibration patterns P1 to P15 having adjacent output orders have significantly different frequencies and gains at least one of them. For example, the vibration patterns P1 and P2 having adjacent output orders have different frequencies and gains, and in particular, the frequencies are significantly different. Further, the vibration patterns P4 and P5 having adjacent output orders have the same frequency but different gains. Further, the vibration patterns P11 and P12 having adjacent output orders have the same gain but different frequencies.

Further, the vibration patterns P1 to P15 having adjacent output orders have different reproduction times. Further, as the pause time corresponding to the plurality of vibration patterns P1 to P14, a plurality of different times are set. 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 having adjacent output orders differ in at least one of frequency and amplitude. As a result, a plurality of vibration patterns P1 to P15 having different frequencies or amplitudes are sequentially output, so that the awakening effect on the vibration stimulus can be maintained or improved.

Further, according to the above-described embodiment, the vibration patterns P1 to P15 having adjacent output orders have different reproduction times. Thereby, the awakening effect on the vibration stimulus can be further maintained or improved.

Further, according to the above-described embodiment, the pause times for the vibration patterns P2 to P15 to be output next are set for each of the plurality of vibration patterns P1 to P14, 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 on the vibration stimulus can be further maintained or improved.

According to the above-described embodiment, the vibration patterns P1 to P15 having adjacent output orders have different reproduction times, but the reproduction time is not limited to this. The reproduction times of the vibration patterns P1 to P15 may all be the same.

Further, according to the above-described embodiment, the pause time corresponding to the plurality of vibration patterns P1 to P14 is set to a plurality of different times, but the rest time is not limited to this. The same time may be set as the rest time.

Further, according to the above-described embodiment, the control unit 320 outputs the vibration patterns P1 to P14 in a predetermined order, but the present invention is not limited to this. For example, a random number generator may be used to randomly output the vibration patterns P1 to P15.

Further, two vibration pattern tables may be prepared, a first vibration pattern table and a second vibration pattern table. In this case, each of the vibration patterns constituting the first vibration pattern table and each of the vibration patterns constituting the second vibration pattern table are set so that at least one of the amplitude and the gain is significantly different. Then, after outputting the vibration pattern randomly selected from the first vibration pattern table, the vibration pattern randomly selected from the second vibration pattern table is output. After that, the vibration pattern randomly selected from the first vibration pattern table may be output again, and this may be repeated. By alternately outputting the vibration patterns from the first and second vibration pattern tables in this way, even if the vibration patterns are randomly output, the vibration patterns in which the output orders are adjacent can be greatly different.

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

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 P1 to P15 may be alternately output to the vibration unit 20 provided on the backrest portion 12 and the vibration unit 20 provided on the seating portion 11. Specifically, after the drive signal of the vibration pattern P1 is output to the vibration unit 20 provided in the backrest portion 12, the drive signal of the vibration pattern P2 is output to the vibration unit 20 provided in the seating portion 11. .. After that, the drive signal of the vibration pattern P3 is output to the vibration unit 20 provided in the backrest portion 12 again, and this is repeated thereafter.

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

In this case, different vibration pattern tables for the backrest and vibration pattern tables for the seating portion 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 the seating portion vibration pattern table is output to the vibration unit 20 provided in the seating portion 11. A plurality of vibration patterns may be output in sequence according to the above. In this case, the backrest vibration pattern table and the seating portion vibration pattern table may not all have the same vibration pattern and the output order of the vibration patterns may not be the same, and some of the same vibration patterns may be adopted. .. Further, even if all the vibration patterns are the same, the output order may be different. Further, the plurality of vibration patterns output by the four vibration units 20 may be different from each other.

Further, the vibration pattern table may be changed by the control unit 320 every time the seated person sits on the seat or every time a drowsiness or a drowsiness state is detected. In this case, for example, a plurality of different vibration pattern tables are prepared. Then, the control unit 320 switches the vibration pattern table every time the seated person sits on the seat, or every time a drowsiness or a drowsiness state is detected. As a result, a plurality of vibration patterns can be changed each time the seated person sits on the seat, or each time a drowsiness or drowsiness state is detected.

Further, every time the seated person sits on the seat, or every time a drowsiness or a drowsiness state is detected, the control unit 320 vibrates a random output of vibration patterns P1 to P15 by using a random number generator or the like. It may be generated as a pattern table.

Further, according to the above-described embodiment, the drowsiness or drowsiness state was detected by the output of the heart rate sensor 310, but the present invention is not limited to this. For example, drowsiness or drowsiness may be detected based on other biological information such as eye movements and face movements. Further, the drowsiness or the drowsiness may be detected by detecting the meandering driving based on the result of detecting the white line from the steering wheel operation or the image taken by the camera mounted on the vehicle.

The present invention is not limited to the above embodiment. That is, it can be modified in various ways without departing from the gist of the present invention.

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

Claims (8)

Detection means for detecting drowsiness or drowsiness of the user,
Vibration generating means that is arranged on the sheet and generates vibration,
A control means for controlling the vibration generating means so that a plurality of vibration patterns are sequentially output when the drowsiness or drowsiness of the user is detected is provided.
The vibration pattern output order is adjacent, with at least one of frequency and amplitude are different, the vibration duration of vibration you being different from the dynamic controller. In the vibration pattern, a pause time until the next output vibration pattern is set.
The vibration control device according to claim 1, wherein a plurality of different times are set for the plurality of pause times. The vibration control device according to claim 1 or 2 , wherein a plurality of the vibration generating means are provided. The vibration control device according to claim 3 , wherein at least one set of the plurality of vibration generating means has the plurality of vibration patterns to be output different from each other. The plurality of vibration patterns are changed each time the user sits on the seat, or each time the user's drowsiness or drowsiness is detected, according to any one of claims 1 to 4. The described vibration control device. The vibration control device according to any one of claims 1 to 5, wherein the seat is a seat mounted on a vehicle. A detection process that detects drowsiness or drowsiness of the user,
A control step for controlling the vibration generating means arranged on the sheet so that a plurality of vibration patterns are sequentially output when the drowsiness or drowsiness of the user is detected is provided.
A vibration control method characterized in that at least one of the frequency and the amplitude of the vibration patterns having adjacent output orders is different , and the duration of the vibration is different. A vibration control program characterized in that the vibration control method according to claim 7 is executed by a computer.

Images