Navigation system for the blind

Abstract

A navigation system for the visually impaired includes a GPS module, a control module, and a cane module. The GPS module collects location information using GPS satellites. The control module receives route guidance information corresponding to a pre-entered destination and location information from an external server. The cane module is capable of communicating with the control module. The cane module includes a handle portion, a main body portion, and a braille forming portion. The handle portion can be gripped. The main body portion extends in a first direction from one end of the handle. The braille forming portion is coupled to the surface of the handle portion. The braille forming portion forms braille corresponding to the route guidance information. By using the braille formed by the braille forming portion, the user can obtain necessary information without relying on hearing.

Description

Technology Field

[0001] The present invention relates to a navigation system for visually impaired persons. Specifically, the present invention relates to a navigation system that guides a movement path using Braille and assists the movement of visually impaired persons through voice recognition and image recognition. Background Technology

[0002] Unlike non-disabled people, visually impaired people primarily rely on sound and touch to get to their desired destinations. Accordingly, assistive devices for the visually impaired (voice guides, braille signs, braille blocks, etc.) are being introduced to assist visually impaired people in using public transportation, including buses and subways.

[0003] However, there are still many regions and facilities that are not adequately equipped with assistive devices for the visually impaired. Furthermore, even where such devices are available, visually impaired individuals may face various difficulties when using public transportation.

[0004] For example, even if announcements are provided in crowded subway cars, it frequently happens that visually impaired individuals find it difficult to hear them due to surrounding noise. Consequently, it is very difficult for visually impaired people to determine whether they have arrived at their destination by listening to the announcements in crowded subway cars. Furthermore, because public restrooms are not equipped with audio guides or Braille signage, visually impaired individuals frequently experience difficulty distinguishing between men's and women's restrooms.

[0005] In addition, visually impaired people face difficulties in using sound and touch to move in numerous situations, such as when determining whether a desired bus has arrived at a bus stop without announcements, or when determining whether it is safe to walk at a crosswalk without announcements. The problem to be solved

[0006] The present invention aims to solve the aforementioned conventional problems by providing a navigation system capable of delivering route guidance information in the form of Braille to visually impaired individuals, even in environments where it is difficult to acquire information through sound due to ambient noise.

[0007] In addition, the present invention aims to provide a navigation system capable of extracting some information from announcements provided in public transportation, such as subways, buses, and trains, and delivering it to visually impaired people in the form of Braille.

[0008] In addition, the present invention aims to provide a navigation system capable of extracting some objects and corresponding information from collected images and transmitting them to visually impaired people in the form of Braille. means of solving the problem

[0009] A navigation system for a visually impaired person according to one embodiment of the present invention may include a GPS module, a control module, and a cane module.

[0010] The GPS module can collect location information using GPS satellites.

[0011] The control module can receive route guidance information from an external server. The route guidance information may correspond to the location information with a pre-entered destination.

[0012] The cane module can communicate with the control module. The cane module may include a handle portion, a main body portion, and a braille forming portion.

[0013] The handle part can be gripped.

[0014] The main body can be extended in a first direction from one end of the handle portion.

[0015] The braille forming part can be coupled to the surface of the handle part to form braille corresponding to the path guidance information.

[0016] A cane module of a navigation system for a visually impaired person according to one embodiment of the present invention may further include a first obstacle detection unit and a second obstacle detection unit.

[0017] The first obstacle detection unit can be coupled to the main body. The first obstacle detection unit can detect an object within a first radius.

[0018] The second obstacle detection unit can be coupled to the main body. The second obstacle detection unit can detect objects within a second radius that is larger than the first radius.

[0019] The distance from one end of the handle portion to the first obstacle detection portion may be longer than the distance from one end of the handle portion to the second obstacle detection portion.

[0020] A navigation system for a visually impaired person according to an embodiment of the present invention may further include a voice collection module that collects a plurality of voice signals. The control module may extract a plurality of sample-feature vectors from the plurality of voice signals. Additionally, the control module may calculate similarity by comparing each of the plurality of sample-feature vectors with a previously stored reference-feature vector. Additionally, the control module may select a target-feature vector having the highest similarity among the plurality of sample-feature vectors. Additionally, the control module may perform voice recognition on a target voice signal corresponding to the target-feature vector and convert the target voice signal into a string. Additionally, the control module may extract a predetermined keyword from the string. The braille forming unit may form braille corresponding to the predetermined keyword. The reference-feature vector may correspond to at least one of a feature vector of a subway announcement and a feature vector of a bus announcement. The above-mentioned predetermined keyword may correspond to at least one of a subway station name, a bus stop name, and a bus number.

[0021] A navigation system for visually impaired persons according to one embodiment of the present invention may further include a shooting module that captures the surroundings to generate a predetermined image. An artificial intelligence model that identifies objects in the image may be stored in the control module. The control module may identify predetermined objects in the predetermined image using the artificial intelligence model. Additionally, the control module may generate facility guidance information based on the predetermined objects and the respective locations of the predetermined objects. The braille forming unit may form braille corresponding to the facility guidance information. The predetermined objects may include at least one of a men's restroom sign, a women's restroom sign, a bus number, a traffic light signal, a handrail, a voice guide, and a braille sign.

[0022] The cane module of the navigation system for a visually impaired person according to one embodiment of the present invention may further include an illuminance sensing unit, a lighting unit, a power generation unit, and a battery.

[0023] The above-described illuminance sensing unit may be coupled to the surface of the main body. Additionally, the illuminance sensing unit may detect ambient illuminance and generate an electrical signal. The control module may compare the ambient illuminance with a reference illuminance based on the electrical signal. If the ambient illuminance is lower than the reference illuminance, the control module may control the lighting unit to turn on.

[0024] The above lighting unit can receive power and emit light. The above lighting unit can extend in the first direction from the surface of the main body.

[0025] The above-mentioned power generation unit may include a lower pressurizing member, a cover member, a plurality of lower pressurizing springs, and a plurality of lower piezoelectric elements.

[0026] The lower pressure member may extend in the first direction from one end of the main body part.

[0027] The cover member can accommodate the lower pressure member.

[0028] Each of the plurality of lower pressure springs can be housed in the cover member. Each of the plurality of lower pressure springs can extend in different directions from the lower pressure member.

[0029] Each of the multiple lower piezoelectric elements can generate power based on applied pressure. One end of each of the multiple lower piezoelectric elements can be coupled to any one of the multiple lower pressure springs. The other end of each of the multiple lower piezoelectric elements can be coupled to the cover member.

[0030] The above battery can store power generated from the plurality of lower piezoelectric elements.

[0031] A navigation system for a visually impaired person according to one embodiment of the present invention may further include a wearable module. The wearable module may be worn on a part of the body. The wearable module may include a sound generating unit that generates a sound corresponding to the route guidance information. The wearable module may be provided in the form of at least one of glasses, a hat, and a necklace.

[0032] [Additional Example 1]

[0033] In Article 5,

[0034] Each of the first to fifth lower pressure springs is one of the plurality of lower pressure springs, and

[0035] A navigation system for a visually impaired person, wherein the first lower pressure spring extends in the first direction from the lower pressure member, the second lower pressure spring extends in the second direction intersecting the first direction from the lower pressure member, the third lower pressure spring extends in the third direction opposite to the second direction from the lower pressure member, the fourth lower pressure spring extends in the fourth direction intersecting the first to third directions from the lower pressure member, and the fifth lower pressure spring extends in the fifth direction opposite to the fourth direction from the lower pressure member.

[0036] [Additional Example 2]

[0037] In Article 6,

[0038] The above-mentioned power generation unit is,

[0039] An upper pressure member coupled to the surface of the handle portion and receiving pressure from the outside;

[0040] An upper pressure spring that is housed in the handle portion and extends in a second direction intersecting the first direction from the upper pressure member; and

[0041] It further includes an upper piezoelectric element that is housed in the handle portion, generates power based on applied pressure, has one end coupled to the upper pressure spring, and the other end coupled to the upper pressure member.

[0042] The above battery is a navigation system for the visually impaired that stores power generated from the upper piezoelectric element.

[0043] [Additional Example 3]

[0044] In Article 1,

[0045] The above cane module further includes a direction measuring unit for measuring the direction of movement and a vibration generating unit for generating vibration by receiving power, and

[0046] The above direction measuring unit is housed in the above main body, and

[0047] The above vibration generating part is positioned adjacent to the handle part, and

[0048] A navigation system for a visually impaired person, wherein the above control module determines whether there is a deviation from the path by comparing the direction of movement measured by the direction measuring unit with the path guidance information received from the external server, and controls the operation of the vibration generating unit according to whether there is a deviation from the direction. Effects of the invention

[0049] According to one embodiment of the present invention, a navigation system can be provided that can deliver route guidance information in the form of Braille to a visually impaired person even in an environment where it is difficult to acquire information through sound due to ambient noise.

[0050] According to one embodiment of the present invention, a navigation system can be provided that extracts some information from announcements provided in public transportation, such as subways, buses, and trains, and delivers it to visually impaired people in the form of Braille.

[0051] According to one embodiment of the present invention, a navigation system can be provided that extracts some objects and corresponding information from collected images and transmits them to a visually impaired person in the form of Braille. Brief explanation of the drawing

[0052] FIG. 1 illustrates an exemplary use of a navigation system for the visually impaired according to an embodiment of the present invention by a visually impaired user. FIG. 2 illustrates a block diagram of a navigation system for visually impaired people according to an embodiment of the present invention. Figure 3 is illustrated to explain the process of a user finding a destination using a navigation system for the visually impaired according to an embodiment of the present invention. FIG. 4 illustrates, in an exemplary manner, a user detecting an obstacle with an empty lower space using a cane module according to another embodiment of the present invention. Figure 5 illustrates an exemplary process in which a navigation system for the visually impaired recognizes a guidance broadcast, forms Braille, and provides information to the user. Figure 6 illustrates an exemplary process in which a navigation system for the visually impaired recognizes a restroom sign, forms Braille, and provides information to the user. Figure 7 illustrates, as an example, the process of a navigation system for the visually impaired recognizing a bus and bus number, forming Braille, and providing information to the user. Figure 8 illustrates an exemplary process in which a navigation system for the visually impaired recognizes a handrail and forms Braille to provide information to the user. Figure 9 is illustrated to explain the process of generating power in the power generation section of the cane module. FIG. 10 is illustrated to explain a method of arranging multiple lower pressure springs to efficiently generate power using kinetic energy provided in various directions. Specific details for implementing the invention

[0053] Preferred embodiments of the present invention will be described in more detail below with reference to the attached drawings. In the drawings, the proportions and dimensions of the components may be exaggerated for the effective explanation of the technical content.

[0054] Terms such as "include" are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0055] In addition, when a component is described as "above," it refers to the area above or below the component, and does not necessarily mean that it is located on the upper side relative to the direction of gravity.

[0056] In addition, where it is stated that a component is "connected" or "combined" to another component, this may include not only cases where the component is directly connected or combined to the other component, but also cases where the component is indirectly connected or combined through another component.

[0057] In addition, terms such as "first," "second," etc., may be used to describe a component; however, these terms are intended merely to distinguish the component from other components and are not intended to limit the essence, order, or sequence of the component.

[0058] FIG. 1 illustrates an exemplary view of a visually impaired user (USR) using a navigation system for the visually impaired (NVS) according to an embodiment of the present invention. FIG. 2 illustrates a block diagram of a navigation system for the visually impaired (NVS) according to an embodiment of the present invention.

[0059] Referring to FIGS. 1 and 2, a navigation system (NVS) for a visually impaired person according to one embodiment of the present invention may include a GPS module (GPM), a control module (CTM), a cane module (STM), a voice collection module (VCM), a video recording module (VDM), and a wearable module (WRM).

[0060] The GPS module (GPM) can collect location information using GPS satellites. The location information collected by the GPS module (GPM) may correspond to the user's (USR) current location.

[0061] The control module (CTM) can receive route guidance information from an external server. The route guidance information may correspond to a pre-entered destination and location information collected from a GPS module (GPM). The control module (CTM) may be combined with at least one of a smart device, a wearable device, a wearable module (WRM), and a cane module (STM) possessed by a user (USR). For example, the wearable device may be at least one of a smart watch, a smart band, or smart glasses. However, the wearable device of the present invention is not limited thereto and may be a device having the form of clothing, glasses, a bracelet, a watch, shoes, a hat, etc. that can be worn on the body.

[0062] The cane module (STM) may include a handle portion (HD), a main body portion (MD), and a braille forming portion (BF). For example, the cane module (STM) may take the form of a cane for the visually impaired that assists a user (USR) in walking without relying on sight.

[0063] The handle portion (HD) can be grasped. That is, the user (USR) can walk by grasping the handle portion (HD).

[0064] The main body (MD) can be extended in a first direction from one end of the handle (HD). The main body (MD) can be in contact with a support surface and support a user (USR).

[0065] The Braille forming part (BF) can be attached to the surface of the handle part (HD). The Braille forming part (BF) can form Braille corresponding to route guidance information. That is, even if the user (USR) has both visual and hearing impairments, the user (USR) can acquire information by using the Braille formed by the Braille forming part (BF). The Braille forming part (BF) may include a plurality of Braille protrusions (PT) and an actuator (not shown).

[0066] Multiple braille protrusions (PT) can form braille by protruding or releasing the protrusion. Multiple braille protrusions (PT) can be coupled to an actuator.

[0067] The actuator can be controlled by a control module (CTM). The actuator can drive each of the plurality of dot projections (PT) to protrude or be released.

[0068] The wearable module (WRM) may be worn on a part of the body. The wearable module (WRM) may include a sound generating unit (SG) that generates a sound corresponding to route guidance information. The wearable module (WRM) may be provided in the form of at least one of glasses, a hat, and a necklace. That is, the sound generating unit (SG) may be positioned adjacent to the user's (USR) ear to provide information to the user in the form of sound. In one embodiment of the present invention, the wearable module (WRM) may be omitted.

[0069] FIG. 3 is illustrated to explain the process of a user (USR) finding a destination (DS) using a navigation system (NVS) for the visually impaired according to an embodiment of the present invention.

[0070] Referring to FIG. 3, when the user (USR) is located at the first point (P1), the route guidance information may include the string "10m straight ahead". Accordingly, the Braille forming unit (BF) produces Braille (corresponding thereto) ) can be formed. When the user (USR) reaches the second point (P2), the route guidance information may include the string "Turn left". Accordingly, the Braille forming unit (BF) forms the Braille corresponding thereto ( ) can be formed. When the user (USR) reaches the third point (P3), the route guidance information may include the string "30m straight ahead". Accordingly, the Braille forming unit (BF) forms the Braille ( corresponding thereto) ) can be formed. When the user (USR) reaches the fourth point (P4), the route guidance information may include the string "Turn right". Accordingly, the Braille forming unit (BF) forms the Braille ( corresponding thereto) ) can be formed. When the user (USR) reaches the fifth point (P5), the route guidance information may include the string "Arrived at destination". Accordingly, the Braille forming unit (BF) forms the Braille corresponding thereto ( It can form ).

[0071] FIG. 4 illustrates an exemplary sight of a user detecting an obstacle (HRD) with an empty lower space using a cane module (STM) according to another embodiment of the present invention.

[0072] Collision accidents frequently occur when visually impaired individuals fail to perceive obstacles (HRD) with empty spaces beneath them while walking with a cane. To prevent this problem, the present invention introduces a first obstacle detection unit (SS1) and a second obstacle detection unit (SS2) for detecting obstacles (HRD) with empty spaces beneath them. Below, an embodiment of the present invention for implementing the technical features described above will be explained.

[0073] Referring to FIG. 4, in one embodiment of the present invention, the cane module (STM) may include a first obstacle detection unit (SS1) and a second obstacle detection unit (SS2). The first obstacle detection unit (SS1) may be coupled to the main body (MD). The first obstacle detection unit (SS1) may detect an object within a first radius (DT1). The second obstacle detection unit (SS2) may be coupled to the main body (MD). The second obstacle detection unit (SS2) may detect an object within a second radius (DT2) that is larger than the first radius (DT1). The distance from one end of the handle (HD) to the first obstacle detection unit (SS1) may be longer than the distance from one end of the handle (HD) to the second obstacle detection unit (SS2).

[0074] That is, even in a situation where the first obstacle detection unit (SS1) fails to detect an obstacle (HRD) with an empty lower space, the second obstacle detection unit (SS2) can detect the obstacle (HRD) with an empty lower space. This is because the second obstacle detection unit (SS2) can detect obstacles that are relatively further away from the support surface and further away than the first obstacle detection unit (SS1). Therefore, by using the present invention, the user (USR) can recognize and avoid obstacles (HRD) with an empty lower space in advance.

[0075] For example, the first obstacle detection unit (SS1) and the second obstacle detection unit (SS2) may each be an ultrasonic sensor. However, this is merely an example, and the first obstacle detection unit (SS1) and the second obstacle detection unit (SS2) of the present invention are not limited thereto. It is sufficient for the first obstacle detection unit (SS1) and the second obstacle detection unit (SS2) to be sensors capable of detecting adjacent objects. In one embodiment of the present invention, the first obstacle detection unit (SS1) and the second obstacle detection unit (SS2) may be omitted.

[0076] Meanwhile, visually impaired individuals generally acquire information using their senses of hearing and touch. However, cases frequently occur where visually impaired people experience inconvenience while using public transportation, such as subways and buses, because they are unable to hear announcements due to surrounding noise. To prevent this problem, the present invention discloses a technical feature that provides information to visually impaired individuals by selecting only announcements from a plurality of collected voice signals and forming corresponding Braille. Below, an embodiment of the present invention for implementing the aforementioned technical feature is described.

[0077] Figure 5 illustrates an exemplary process in which a navigation system for the visually impaired (NVS) recognizes a guidance broadcast, forms Braille, and provides information to the user (USR).

[0078] Referring to FIG. 5, in one embodiment of the present invention, a voice collection module (VCM) can collect a plurality of voice signals. For example, the voice collection module (VCM) may be coupled to at least one of a smart device, a wearable device, a wearing module (WRM), and a cane module (STM) possessed by a user (USR). For example, the wearable device may be at least one of a smart watch, a smart band, or smart glasses. However, the wearable device of the present invention is not limited thereto and may be a device having the form of clothing, glasses, a bracelet, a watch, shoes, a hat, etc. that can be worn on the body.

[0079] The control module (CTM) can extract multiple sample-feature vectors from multiple voice signals collected by the voice acquisition module (VCM). The control module (CTM) can extract feature vectors of the voice signals by converting the time domain-based voice signals into signals in the frequency domain and then transforming the frequency energy of the converted signals differently. In this process, Mel-Frequency Cepstral Coefficients, Filter Bank Energy, etc., may be utilized.

[0080] Additionally, the control module (CTM) can calculate similarity by comparing each of the multiple sample-feature vectors with a previously stored reference-feature vector. For example, the reference-feature vector may correspond to at least one of the feature vector of a subway announcement and the feature vector of a bus announcement. That is, the reference-feature vector may be a feature vector of an announcement transmitted inside public transportation, such as a bus, subway, or train, that has been extracted and stored in advance.

[0081] In addition, the control module (CTM) can select the target feature vector having the highest similarity among multiple sample feature vectors. That is, in this process, the control module (CTM) can extract a voice signal having characteristics most similar to the announcement.

[0082] In addition, the control module (CTM) can perform speech recognition on the target speech signal corresponding to the target feature vector and convert the target speech signal into a string.

[0083] Additionally, the control module (CTM) can extract a specific keyword from a string. The braille forming unit (BF) can form braille corresponding to the specific keyword. The specific keyword may correspond to at least one of a subway station name, a bus stop name, and a bus number (BNM). For example, if the specific keyword is "Yeoksam Station", the braille forming unit (BF) forms braille ( corresponding to "Yeoksam Station") It can form ). In addition, the sound generating part (SG) of the wearable module (WRM) can generate a sound corresponding to the specific string of characters ("Yeoksam Station") described above.

[0084] Therefore, by utilizing the present invention, a user (USR) can obtain necessary information through Braille even in situations where it is difficult to hear announcements due to ambient noise. Furthermore, even if a user (USR) has both visual and hearing impairments, they can conveniently use public transportation by utilizing the present invention. In one embodiment of the present invention, the voice collection module (VCM) may be omitted.

[0085] Meanwhile, the introduction of devices designed to provide information to the visually impaired, such as voice guides and Braille signs, remains insufficient. Consequently, the visually impaired face difficulties in using public transportation facilities, such as subway stations, bus stops, and crosswalks. To address this situation, the present invention discloses a technical feature that assists the visually impaired in using public transportation facilities through image recognition technology. Below, an embodiment of the present invention for implementing the aforementioned technical feature is described.

[0086] In one embodiment of the present invention, the imaging module (VDM) can generate a predetermined image by capturing the surroundings. The imaging module (VDM) can generate a predetermined image by capturing an area corresponding to the direction of movement or field of view of the user (USR). For example, the imaging module (VDM) may be coupled to at least one of a smart device, a wearable device, a wearing module (WRM), and a cane module (STM) possessed by the user (USR). For example, the wearable device may be at least one of a smart watch, a smart band, or smart glasses. However, the wearable device of the present invention is not limited thereto and may be a device having the form of clothing, glasses, a bracelet, a watch, shoes, a hat, etc. that can be worn on the body.

[0087] An artificial intelligence model for identifying objects in an image may be stored in the control module (CTM). Additionally, the control module (CTM) can identify specific objects in a specific image collected by the video recording module (VDM) using the artificial intelligence model. For example, the specific objects may include at least one of a men's restroom sign (MTM), a women's restroom sign (FTM), a bus number (BNM), a traffic light signal (not shown), a handrail (HR), a voice guide (not shown), and a Braille sign (not shown). Furthermore, the control module (CTM) can generate facility information based on the specific objects and the location of each of the specific objects. The Braille forming unit (BF) can form Braille corresponding to the facility information. The sound generating unit (SG) of the wearable module (WRM) can generate a sound corresponding to the facility information. In one embodiment of the present invention, the video recording module (VDM) may be omitted.

[0088] Figure 6 illustrates an exemplary process in which a navigation system for the visually impaired (NVS) recognizes a restroom sign, forms Braille, and provides information to the user (USR).

[0089] Referring to FIG. 6, when objects corresponding to the male restroom mark (MTM) and the female restroom mark (FTM), respectively, are simultaneously identified in a predetermined image collected by the video recording module (VDM), the control module (CTM) can generate facility guidance information including specific strings ("Left female restroom", "Right male restroom"). Subsequently, the braille forming unit (BF) generates braille ( , It can form a ). In addition, the sound generating unit (SG) of the wearable module (WRM) can generate a sound corresponding to the specific string of characters described above ("Left women's restroom", "Right men's restroom"). That is, by using the present invention, the user (USR) can conveniently use the restroom corresponding to their gender without experiencing difficulties caused by confusing men's and women's restrooms.

[0090] Figure 7 illustrates an exemplary process in which a navigation system for the visually impaired (NVS) recognizes a bus and a bus number (BNM), forms Braille, and provides information to a user (USR).

[0091] Referring to FIG. 7, when a bus approaching the user (USR) and an object corresponding to the bus number are simultaneously identified in a predetermined image collected by the video recording module (VDM), the control module (CTM) can generate facility guidance information including a specific string ("472"). Subsequently, the braille forming unit (BF) generates braille ( corresponding to the facility guidance information) It can form a ). In addition, the sound generating unit (SG) of the wearable module (WRM) can generate a sound corresponding to the specific string ("472") described above. That is, by using the present invention, even at a bus stop where announcements are not provided, the user (USR) can conveniently recognize whether the bus they wish to board has arrived using Braille.

[0092] FIG. 8 illustrates an exemplary process in which a navigation system (NVS) for the visually impaired recognizes a handrail (HR), forms Braille, and provides information to a user (USR).

[0093] Referring to FIG. 8, when an object corresponding to a handrail (HR) for assisting walking is identified in a predetermined image collected by a video recording module (VDM), the control module (CTM) can generate facility guidance information including a specific string ("left handrail"). Subsequently, the braille forming unit (BF) generates braille ( corresponding to the facility guidance information) It can form a ). In addition, the sound generating unit (SG) of the wearable module (WRM) can generate a sound corresponding to the specific string of characters ("left handrail") described above. That is, by using the present invention, the user (USR) can conveniently recognize the location of the handrail (HR) that can be utilized for safe walking.

[0094] Although not illustrated in the drawings, the present invention allows the user (USR) to conveniently recognize and use traffic light signals, voice guides, and Braille signs in the same manner.

[0095] In one embodiment of the present invention, a navigation system (NVS) for the visually impaired may further include a vibration module (not disclosed) that generates vibration. The vibration module may be coupled to a wearable module (WRM). Multiple vibration modules may be provided. Multiple vibration modules may generate vibrations corresponding to route guidance information and facility guidance information. The first vibration module and the second vibration module may each be any one of the multiple vibration modules. The first vibration module may be coupled to one end of the wearable module (WRM), and the second vibration module may be coupled to the other end of the wearable module (WRM). That is, the user (USR) may perceive route guidance information and facility guidance information depending on whether the first vibration module and the second vibration module are operated.

[0096] Meanwhile, visually impaired individuals find it difficult to avoid vehicles by perceiving light emitted from them in advance at night. Drivers also face the possibility of accidents because their limited field of vision during night driving prevents them from spotting visually impaired individuals. To prevent such risks, the present invention discloses a technical feature that emits light in situations of low ambient light to aid the driver's visibility and prevent accidents. An embodiment of the present invention for implementing the aforementioned technical feature is described below.

[0097] In one embodiment of the present invention, referring to the drawings, the cane module (STM) may further include an illuminance sensing unit (not shown), a lighting unit (not shown), a power generation unit (GNR), and a battery (not shown). The illuminance sensing unit may be coupled to the surface of the main body (MD). The illuminance sensing unit may detect ambient illuminance and generate an electrical signal. The control module (CTM) may compare the ambient illuminance with a reference illuminance based on the electrical signal. If the ambient illuminance is lower than the reference illuminance, the control module (CTM) may control the lighting unit to turn on. The lighting unit may receive power and emit light. The lighting unit may extend in a first direction from the surface of the main body (MD). That is, by using the present invention, the possibility of nighttime accidents caused by vehicles can be reduced.

[0098] Meanwhile, power is continuously consumed for each component of the present invention to operate. When a visually impaired person walks using a cane module (STM), they repeatedly tap the ground or obstacles with the tip of the cane module (STM) to recognize surrounding obstacles. If power is generated using the kinetic energy consumed at this time, a portion of the power consumption (used to operate each component) described above can be covered. In other words, energy harvesting is possible using kinetic energy provided by the user (USR). An embodiment of the present invention for implementing energy harvesting is described below.

[0099] Figure 9 is illustrated to explain the process of power generation in the power generation unit (GNR) of the cane module (STM).

[0100] Referring to FIG. 9, in one embodiment of the present invention, the cane module (STM) may further include an illuminance sensing unit, a lighting unit, a power generation unit (GNR), and a battery (not shown). The power generation unit (GNR) may include a lower pressure member (PRS), a cover member (CVR), a plurality of lower pressure springs (PRR), and a plurality of lower piezoelectric elements (PZE). When a user (USR) grasps the handle (HD) and performs a motion of striking the ground or an obstacle, the kinetic energy generated at that time is finally transferred to the plurality of lower piezoelectric elements (PZE) through the lower pressure member (PRS) and the plurality of lower pressure springs (PRR) to generate power.

[0101] The lower pressure member (PRS) can extend in a first direction from one end of the main body (MD). The lower pressure member (PRS) can transfer kinetic energy to a plurality of lower pressure springs (PRR).

[0102] The cover member (CVR) can accommodate the lower pressurizing member (PRS).

[0103] Each of the multiple lower pressure springs (PRR) can be housed in the cover member (CVR). Each of the multiple lower piezoelectric elements (PZE) is coupled to and fixed in the cover member (CVR), thereby providing maximum kinetic energy. Each of the multiple lower pressure springs (PRR) can extend in different directions from the lower pressure member (PRS). That is, the multiple lower pressure springs (PRR) can transfer kinetic energy provided from various directions to the multiple lower piezoelectric elements (PZE).

[0104] Each of the multiple lower piezoelectric elements (PZE) can generate power based on applied pressure. One end of each of the multiple lower piezoelectric elements (PZE) can be coupled to any one of the multiple lower pressure springs (PRR). The other end of each of the multiple lower piezoelectric elements (PZE) can be coupled to a cover member (CVR).

[0105] The battery can store power generated from multiple lower piezoelectric elements (PZE). The battery can supply power to each component.

[0106] Hereinafter, a method for arranging multiple lower pressure springs (PRR) to efficiently generate power using kinetic energy provided in various directions is described in detail.

[0107] FIG. 10 is illustrated to explain a method of arranging multiple lower pressure springs (PRRs) to efficiently generate power using kinetic energy provided in various directions.

[0108] Referring to FIG. 10, in one embodiment of the present invention, each of the first lower pressure spring (PRR1) to the fifth lower pressure spring (PRR5) may be any one of a plurality of lower pressure springs (PRR).

[0109] The first lower pressure spring (PRR1) may extend from the lower pressure member (PRS) in a first direction (DR1). The second lower pressure spring (PRR2) may extend from the lower pressure member (PRS) in a second direction (DR2) that intersects the first direction (DR1). The third lower pressure spring (PRR3) may extend from the lower pressure member (PRS) in a third direction (DR3) that is opposite to the second direction (DR2). The fourth lower pressure spring (PRR4) may extend from the lower pressure member (PRS) in a fourth direction (DR4) that intersects the first direction (DR1) through the third direction (DR3). The fifth lower pressure spring (PRR5) may extend from the lower pressure member (PRS) in a fifth direction (DR5) that is opposite to the fourth direction (DR4). That is, regardless of whether the kinetic energy described above is provided in any of the first direction (DR1) to the fifth direction (DR5) through the lower pressurizing member (PRS), the plurality of lower piezoelectric elements (PZE) can receive the kinetic energy and generate power. Accordingly, power can be generated even if the user (USR) performs the action of striking the ground or an obstacle by gripping the handle part (HD) at any angle.

[0110] Below, additional embodiments of the present invention for implementing energy harvesting are described.

[0111] In one embodiment of the present invention, the power generation unit (GNR) may further include an upper pressure member (not shown), an upper pressure spring (not shown), and an upper piezoelectric element (not shown).

[0112] The upper pressure member can be attached to the surface of the handle portion (HD). The upper pressure member can receive pressure from the outside. For example, a user (USR) can apply pressure to the upper pressure member by gripping the handle portion (HD).

[0113] The upper pressure spring can be extended from the upper pressure member in a second direction (DR2) that intersects the first direction (DR1).

[0114] The upper piezoelectric element can generate power based on applied pressure. One end of the upper piezoelectric element can be coupled to an upper pressure spring. The other end of the upper piezoelectric element can be coupled to an upper pressure member.

[0115] Hereinafter, another embodiment of the present invention for guiding the walking of a user (USR) by detecting the direction of movement of the user (USR) will be further described.

[0116] In one embodiment of the present invention, the cane module (STM) may further include a direction measuring unit (not shown) and a vibration generating unit (not shown).

[0117] The direction measuring unit can measure the direction of movement of the user (USR). The direction measuring unit can be housed in the main body (MD).

[0118] The vibration generating unit can generate vibrations by receiving power. The vibration generating unit can be positioned adjacent to the handle (HD).

[0119] The control module (CTM) can determine whether there is a deviation from the path by comparing the direction of movement measured by the direction measurement unit with the path guidance information received from an external server. The control module (CTM) can control the operation of the vibration generation unit depending on whether there is a deviation from the path. Therefore, by using the present invention, the user (USR) can independently detect whether there is a deviation from the path through vibration and correct the direction of movement.

[0120] Although the invention has been described with reference to exemplary embodiments, those skilled in the art will understand that various modifications and changes can be made to the invention without departing from the spirit and scope of the invention as set forth in the following claims. Furthermore, the exemplary embodiments disclosed in the invention are not intended to limit the technical spirit of the invention, and all technical spirits within the scope of the following claims and their equivalents should be interpreted as being included within the scope of the rights of the invention. Explanation of the symbols

[0121] NVS: Navigation System for the Visually Impaired GPM: GPS module CTM: Control module STM: Cane Module VCM: Voice Collection Module VDM: Recording module HD: Handle part MD: Main body BF: Braille forming part GNR: Power generation unit PRS: Lower pressurizing member CVR: Cover member PRR: Multiple lower pressure springs PZE: Multiple lower piezoelectric elements

Claims

Claim 1 A GPS module that collects location information using GPS satellites; a control module that receives route guidance information corresponding to a pre-entered destination and the location information from an external server; and a cane module capable of communicating with the control module, wherein the cane module comprises: a handle portion capable of being gripped; a main body portion extending in a first direction from one end of the handle portion; a braille forming portion coupled to the surface of the handle portion to form braille corresponding to the route guidance information; and a power generation portion, wherein the power generation portion comprises: a lower pressure member extending in the first direction from one end of the main body portion; a cover member that accommodates the lower pressure member; and a plurality of lower pressure springs, each accommodated in the cover member and extending in different directions from the lower pressure member. A navigation system for a visually impaired person comprising a plurality of lower piezoelectric elements, each generating power based on applied pressure, each having one end coupled to any one of the plurality of lower pressure springs and the other end coupled to the lower pressure member, wherein a first lower pressure spring among the plurality of lower pressure springs extends in the first direction from the lower pressure member, and a second lower pressure spring among the plurality of lower pressure springs extends in the second direction intersecting the first direction from the lower pressure member. Claim 2 A navigation system for a visually impaired person according to claim 1, wherein the cane module further comprises: a first obstacle detection unit coupled to the main body and detecting an object within a first radius; and a second obstacle detection unit coupled to the main body and detecting an object within a second radius larger than the first radius, wherein the distance from one end of the handle portion to the first obstacle detection unit is longer than the distance from one end of the handle portion to the second obstacle detection unit. Claim 3 A navigation system for a visually impaired person according to claim 1, further comprising a wearable module worn on a part of the body, wherein the wearable module comprises a sound generating unit that generates a sound corresponding to the route guidance information, and wherein the wearable module is provided in the form of at least one of glasses, a hat, and a necklace.

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