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JP2002257581

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DESCRIPTION JP2002257581
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
guidance system, and more particularly to a portable guidance system carried by a pedestrian for
guiding the pedestrian by voice guidance.
[0002]
2. Description of the Related Art A conventional apparatus of this type is disclosed, for example,
in Japanese Patent Laid-Open No. 2000-205891. The device of the same publication detects the
current position of a blind person (hereinafter referred to as a blind person) using GPS or the
like, searches a route from the map information stored in advance and the destination position,
and voices It is used to guide and guide the blind. If this device is used, it is possible for the blind
person to select the shortest route to the destination or to recognize a dangerous place on the
route to the destination, when trying to go to a destination where the blind person usually does
not stop. Become.
[0003]
In addition, in the device that guides using voice as described above, it is also possible to guide
pedestrians other than the blind, for example, infants who can not recognize the map.
[0004]
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However, the device of the above-mentioned publication is for providing voice guidance based on
the current location and the map information, and regarding which way to proceed with respect
to the traveling direction, the current location and the map It can not be accurately derived only
by reference.
Specifically, for example, in a course change at a complicated intersection, it is not possible to
accurately instruct a blind person or the like the direction to go.
[0005]
The present invention has been made in view of the above-mentioned problems, and an object
thereof is to provide a portable guidance device capable of smoothly guiding a pedestrian to a
destination.
[0006]
According to the first aspect of the present invention, the direction detecting means detects the
direction of the pedestrian's body.
Further, based on the searched route and the direction of the pedestrian's body detected by the
direction detecting means, the guidance direction is voice-guided by the voice guiding means. In
this way, it is possible to accurately instruct the pedestrian (especially, a blind person who can
not recognize the map, a toddler or the like who can not recognize the map) the direction (the
traveling direction) to proceed, and smooth the guidance of the pedestrian to the destination. Can
be done.
[0007]
According to the second aspect of the present invention, the voice guidance is performed by
informing the direction to proceed based on the direction of the pedestrian's body, so that even
in a situation where the pedestrian does not know the east, west, north, south on the land And
can accurately guide the pedestrian in the direction of travel.
[0008]
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According to the third aspect of the invention, it is preferable to notify the pedestrian of the voice
guidance if the voice guidance is performed by the headphone which the pedestrian puts on his
head.
According to the fourth aspect of the present invention, when the direction detecting means is
installed in the headphones, the pedestrian may attach the headphones to the head to detect the
direction of the pedestrian's face as the direction of the pedestrian's body by the direction
detecting means. it can.
[0009]
The headphone has left and right speakers as in claim 5, and by differentiating the sound from
the left and right speakers so that the voice guidance can be heard from the direction to be
guided, the pedestrian can easily detect the traveling direction And it is practically preferable.
[0010]
According to the sixth aspect of the invention, the obstacle detection means detects and notifies
an obstacle around the pedestrian.
According to the invention described in claim 7, the notification to the pedestrian is performed
by notifying the presence direction of the obstacle based on the orientation of the pedestrian's
body, so that the obstacle present in the direction in which the body is facing We can inform you
of things properly.
[0011]
If the pedestrian is notified by the headphone with his head attached to his head as in the eighth
aspect, it is preferable to notify the pedestrian of the presence of the obstacle. The headphone
may have left and right speakers as in claim 9, and by making the sounds from the left and right
speakers different so that notification to the pedestrian can be heard from the direction in which
the obstacle exists, obstacles caused by the pedestrian This makes it easy to detect the direction
in which the object exists and is practically preferable.
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[0012]
According to the tenth aspect of the invention, the voice of the pedestrian is input to the
microphone and identified by the voice identification means. And voice guidance is performed by
responding to the pedestrian's voice. Thus, by realizing interactive voice guidance, guidance can
be performed when necessary.
[0013]
According to the invention described in claim 11, the destination is set by the voice identified by
the voice identification means.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will
now be described with reference to the drawings.
FIG. 1 is a block diagram showing a schematic configuration of a guide-guide device 1 for the
blind in the present embodiment.
[0015]
As shown in FIG. 1, the guide-guide device 1 for blind people is a portable device carried and
used by a blind person, and a member (headphone part) 2 mounted on the head and a member
housed in a holder of a belt portion (Belt holder portion) 3 consists of a member (cane portion) 4
attached to the cane. Further, the guide guide device 1 for blind people in the present
embodiment employs, for example, a global positioning system (GPS) used for detecting the
position of the vehicle in a car navigation system.
[0016]
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The configuration of the guide-guide device 1 for blind people will be described in detail below.
As shown in FIGS. 1 and 2, the headphone unit 2 includes a GPS unit 11, an ultrasonic wave
transmitting / receiving unit 12, an azimuth detection sensor 13, a right speaker 14 a, a left
speaker 14 b, and a microphone 15. In FIG. 2, the GPS unit 11, the ultrasonic transmission /
reception unit 12, and the direction detection sensor 13 are disposed at the top of the frame 17
in the headphones and the speakers 14 a and 14 b are disposed at both ends of the frame 17. It
is done. The microphone 15 is disposed at the tip of an arm 18 extending from the end of the
frame 17.
[0017]
The GPS unit 11 obtains current position data of a blind person by communicating with GPS
satellites. The ultrasonic wave transmission / reception unit 12 as an obstacle detection unit
includes an ultrasonic wave transmission unit for transmitting an ultrasonic wave signal, and an
ultrasonic wave reception unit for receiving a reflected wave of the ultrasonic wave signal. The
ultrasonic transmission / reception unit 12 transmits an ultrasonic signal having directivity in the
traveling direction of the blind person and receives a reflected wave thereof, thereby detecting an
obstacle existing in the traveling direction of the blind person, such as front, back, left, and right
A plurality of ultrasonic signals having directivity in each direction are transmitted and their
reflected waves are received. This makes it possible to detect an obstacle in the vicinity of the
blind person. Further, the azimuth detection sensor 13 as the direction detection means detects
the direction of the face of the blind person by, for example, electrically acquiring the output of
the azimuth magnetic needle. The speakers 14a and 14b convert an electric signal into voice and
output voice guidance (voice guidance). The microphone 15 is used to give a voice instruction
when the blind person sets, for example, a destination, and converts the input voice into an
electrical signal.
[0018]
On the other hand, as shown in FIG. 1, the belt holder unit 3 includes a navigation unit 21, an
ultrasonic processing unit 22, an azimuth signal processing unit 23, a direction determination
unit 24, a voice synthesis unit 25, a voice identification unit 26, and a main operation unit 27. ,
The battery unit 28. The belt holder unit 3 functions as a main unit that controls various controls.
[0019]
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The navigation unit 21 captures map data and the like from a storage medium such as a DVD and
a CD storing map data and the like, and captures the current position data detected by the GPS
unit 11. The map data includes, for example, information on intersections and hospitals, and
geographical information important when a blind person walks, such as the presence or absence
of a stage and the presence or absence of a pedestrian crossing.
[0020]
The voice data received by the microphone 15 is taken into the voice identification unit 26, and
processing for voice recognition is performed based on the voice data. The destination data
recognized by the voice identification unit 26 is taken into the navigation unit 21.
[0021]
Thus, the navigation unit 21 acquires destination data such as the address and the telephone
number of the destination, and the name of the destination, for example. Furthermore, the
navigation unit 21 sets an optimal route from the current position to the destination based on the
current position, the destination, and the map data. As this method, a route setting and route
searching method is diverted in a navigation system of a car.
[0022]
The ultrasonic processing unit 22 acquires data (for example, data on the presence or absence of
an obstacle and the direction in which the obstacle is present) on the basis of the reflection signal
obtained by the reception unit of the ultrasonic transmission / reception unit 12. Based on the
detection signal of the direction detection sensor 13, the direction signal processing unit 23
calculates in which direction the blind person is facing on the map data.
[0023]
The direction determining unit 24 takes in the route searched by the navigation unit 21, the
direction of the face of the blind calculated by the azimuth signal processing unit 23, and the
direction of the obstacle acquired by the ultrasonic processing unit 22. Based on the direction,
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the guidance direction of the blind person is determined and the obstacle direction is determined.
[0024]
The voice synthesis unit 25 as voice guidance means is for notifying the presence of voice data
for guiding the route and the obstacle based on the guidance direction of the blind person
determined by the direction determination unit 24 and the existence direction of the obstacle.
Create voice data.
The voice data is sent from the voice synthesis unit 25 to the speakers 14a and 14b, converted
into voice by the speakers 14a and 14b, and output as voice guidance. In the present
embodiment, the voice guidance can be heard from a specific direction by making the voice data
(binaural listening signal) sent to the left and right speakers 14a and 14b different based on the
known sound source localization technique. I am trying to give an effect.
[0025]
Specifically, the sound from one speaker is made larger than the other, or the sound from one
speaker is output earlier than the other so that the voice guidance can be heard from the right
side or the left side. Also, for example, the frequency of the sound output from both the speakers
14a and 14b is changed so that the sound guidance can be heard from the front or the back. As
an example, when an obstacle is detected on the left side of the blind person, the sound of the left
speaker 14b is made larger than that on the right side, and the sound of the left speaker 14b is
output about 10 ms earlier. As a result, the preceding sound effect occurs, and the blind person
feels as if the voice guidance can be heard from the left side, which makes it easy to detect the
direction of the obstacle by the blind person. In addition, for infants who do not understand
words such as left and right, for example, voice guidance using a designated pronoun such as
"This side is not good" can be used to provide guidance and guidance to infants properly. It
becomes.
[0026]
Various keys (not shown) are arranged in the main body operation unit 27 of FIG. 1, and various
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instructions such as turning on / off of the system power and setting of various operation modes
are input by the key operation. Also, the battery unit 28 supplies power to the belt holder unit 3.
[0027]
The wand portion 4 includes a remote control operation portion 31 for remotely operating the
belt holder portion 3. The remote control operation unit 31 has the same function as the main
body operation unit 27 (functions such as switching of power supply and mode setting).
[0028]
In the present embodiment, information is exchanged between the headphone unit 2 and the belt
holder unit 3 and between the wand unit 4 and the belt holder unit 3 using wired or wireless
communication.
[0029]
Next, the operation of the guide-guide device 1 for the blind in the present embodiment will be
described.
First, the blind person operates the main body operation unit 27 or the remote control operation
unit 31 to turn on the power of the belt holder unit 3 and then performs the setting operation of
the destination (address, telephone number, name, etc.) using the microphone 15. . The voice at
the time of the setting operation is converted into voice data by the microphone 15 and taken
into the voice identification unit 26. Then, the voice data is recognized by the voice identification
unit 26, and is taken into the navigation unit 21 as data for setting a destination. Thereafter, in
the navigation unit 21, a route search from the current position of the blind person to the
destination is performed by the same method as the navigation system for a car.
[0030]
Then, according to the route searched by the navigation unit 21, voice guidance is performed
according to the current position of the blind person at that time. In the present embodiment, in
addition to the voice guidance for promoting the change of course of the blind, the voice
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guidance is performed in response to the voice of the blind. In addition, when the presence of an
obstacle is detected, voice guidance for notifying it is provided.
[0031]
Here, an example of the voice guidance by the blind person guidance system 1 will be described
with reference to FIG. In FIG. 3, it is assumed that the blind person A travels north on the road R
and travels along a fork that divides into a road heading to the east and guides the route so as to
go to the east.
[0032]
As shown in FIG. 3A, when the blind person A reaches the forked road, the azimuth signal
processing unit 23 determines that the face direction X of the blind person A is north based on
the detection signal of the azimuth detection sensor 13 At the same time, the navigation unit 21
determines that the route Y to the destination changes to the east. Then, based on the face
direction X and the path Y of the blind person A, the direction determining unit 24 determines
that the direction in which the blind person A should be guided (the advancing direction of the
blind person A) is right with respect to the face direction X of the blind person A. Decide to be.
Thereafter, the voice synthesis unit 25 “is an intersection based on the traveling direction
determined by the direction determination unit 24. Turn right towards "" Is generated and output
to the speakers 14a and 14b. The voice data is converted to voice by the speakers 14a and 14b
and output as voice guidance. Here, the audio data is signal-processed so that the audio can be
heard from the right side, and the audio is output from the speakers 14a and 14b.
[0033]
After the blind person A turns his face to the east as shown in FIG. 3 (b) after receiving this voice
guidance, for example, the blind person “is this direction? Sound is emitted to the microphone
15. In this case, since the face direction X of the blind person A is the east and the direction in
which the blind person A should be guided is the east, the speech synthesis unit 25 says “Yes.
Please go in that direction. Generate voice data such as The voice data is converted to voice by
the speakers 14a and 14b and output as voice guidance.
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[0034]
In this way, if the direction of movement of the blind person A is instructed based on the face
direction X of the blind person A, guidance of the direction of movement with respect to the blind
person A is accurate even in the situation where the blind person A does not know It will be
done.
[0035]
Further, in the route guidance, for example, when an obstacle is present on the left of the blind
person A, the ultrasonic processing unit 22 determines the presence direction of the obstacle,
and the direction signal processing unit 23 The orientation X is determined.
The direction determining unit 24 determines that the presence direction of the obstacle is left
with respect to the face direction X based on the presence direction of the obstacle and the face
direction X of the blind person A. Thereafter, based on the direction determined by the direction
determination unit 24, the speech synthesis unit 25 “there is an obstacle on the left side.
Generate voice data such as This audio data is signal-processed so that it can be heard from the
left side, and is output as audio guidance from the speakers 14a and 14b.
[0036]
Furthermore, when the blind person A passes in front of a facility such as an intersection or a
hospital, the guidance and guidance device 1 according to the present embodiment provides
voice guidance along with information about the route to the destination. In advance, voice
guidance will be given to information (such as stairs and pedestrian crossings) that is important
when walking.
[0037]
Thus, the present embodiment has the following features.
(1) The guidance guide device 1 for blind people guides the guidance direction by voice based on
the direction detection sensor 13 which detects the direction in which the face of the blind
person A is facing, the searched path Y and the face direction X of the blind person A A voice
synthesis unit 25 is provided. Therefore, by guiding the guidance direction by voice based on the
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searched path Y and the face direction X of the blind person A, it is possible to accurately
indicate the direction in which the blind person A should move. As a result, guidance to the
destination of the blind person A can be smoothly performed.
[0038]
(2) Since the voice guidance is performed by informing the direction to go with reference to the
face direction X of the blind person A, even if the blind person A does not know the east, west,
north, south on the land, The guidance can be accurately performed.
[0039]
(3) As in the present embodiment, it is preferable to notify the blind person A of the voice
guidance if the voice guidance is performed by the headphones attached to the head of the blind
person A.
(4) As shown in FIG. 2, since the direction detection sensor 13 is installed on the headphones, the
blind person A can detect the face direction X as the body direction of the blind person A by
attaching the headphones.
[0040]
(5) Different voice data (binary listening signals) sent to the left and right speakers 14a and 14b
makes it possible to hear the voice guidance from the direction to be guided, so detection of the
traveling direction by the blind person A becomes easy .
[0041]
(6) The blind person A is notified of the obstacle based on the face direction X of the blind person
A by notifying the presence direction of the obstacle. Therefore, the obstacle present in the face
direction X of the blind person A Can be informed.
[0042]
(7) If the blind person A notifies the blind person A of the obstacle with the headphones attached
to his head, it is preferable to notify the blind person A of the presence of the obstacle.
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(8) Since the notification to the blind person A can be heard from the direction in which the
obstacle exists by differentiating the voice data (binaural listening signals) sent to the left and
right speakers 14a and 14b, the blind person A Detection of the direction of presence is
facilitated.
[0043]
(9) The blind guiding guide device 1 includes the microphone 15 for inputting the voice of the
blind person A, and the voice identification unit 26 for identifying the voice input to the
microphone 15. The blind person identified by the voice identification unit 26 The voice
guidance was provided by responding to the voice of A.
Thus, by realizing interactive voice guidance, guidance can be performed when necessary.
[0044]
In addition to the above, the embodiment can be embodied in the following form. In the above
embodiment, the invention is embodied as the blind guiding guide device 1. However, the present
invention is not limited to the device for guiding the blind person A, and may be embodied as a
guiding guide device for healthy persons. That is, the guidance apparatus should just be a thing
for guiding a pedestrian. The voice guidance of the route based on the face direction of the
pedestrian in the guidance and guidance device allows the pedestrian to reach the destination
smoothly without having to check the traveling direction by looking at the map screen. In
addition, even in an infant or the like who can not recognize the map, it is possible to easily
recognize the direction to be advanced (progressive direction) by voice guidance based on the
face direction.
[0045]
In the above embodiment, a member (headphone part 2) mounted on the head, a member (belt
holder part) 3 stored in the holder of the belt, a member (cane part) 4 attached to the cane
However, the present invention is not limited to this. The point is that it can be embodied as a
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portable guidance device. For example, a main unit (belt holder unit 3) including navigation unit
21, ultrasonic processing unit 22, direction signal processing unit 23, direction determination
unit 24, voice synthesis unit 25, voice recognition unit 26, main body operation unit 27, and
battery unit 28. ) May be stored not in the belt holder but in a backpack or the like carried by the
blind.
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