TR201704725A2 - A SMART GUIDE DEVICE FOR VISUAL IMPAIRED PEOPLE - Google Patents

Abstract

The present invention relates to an intelligent guidance device for visually impaired persons, wherein the device comprises a laser source (101), an ultrasonic sensor (104) provided next to the laser source (101), and a device for warning the visually impaired person about any obstacle (109). an output mechanism (108), a gyroscope (102) attached to the laser source (101), a camera (103) for capturing an image (207) of a broken laser beam (206) from the obstacle (109), the image captured by the camera (103). an image processing unit 105 for processing the obstruction 109 based on the image 207 of the refracted laser beam, the height 205 of the laser source 101, and the angle 201 between a laser beam path 204 and the ultrasonic sensor 104. ), an embedded system (106) configured to calculate its height.

Description

DESCRIPTION AN INTELLIGENT GUIDANCE DEVICE FOR THE VISUALLY IMPAIRED This invention, according to claim, relates to an intelligent guidance device for visually impaired persons.

For a visually impaired person, walking alone without falling is a challenge. a walking stick It is difficult for them to walk properly even with the help of it. Many on the market device exists. This walking stick warns the person that there is an obstacle while walking. However, this canes such as canes that indicate whether the obstacle is a hole or a bump does not give. In addition, the devices provide information on the dimensional characteristics of the obstacle. does not give. That is, if the obstacle is a bump or any other object, the device cannot provide information about its height or depth. an ultrasonic sensor that detects moving and stationary obstacles, with a Radio Frequency Equipped with Identification (RFID) and receiving a Radio Frequency Identification signal A sensor unit that receives position guidance information using a vibration-generating vibration motor, which provides control to provide walking guidance information status via an LED, which provides obstacle information via a controller and a sound a walking guide device for the blind with an output unit that displays information is explained. In the document numbered CN103830071A, which is another prior art document, an infrared A walking stick equipped with a detector is shown. An infrared sensing head, It is mounted on the front end of the handle of the cane and has an internally arranged infrared sensing header circuit communicates with an alarm prompter on the handle. Handle, infrared Equipped with a switch used to connect or disconnect the detection coil. Walking stick When used, the infrared sensing head will detect the status of the road ahead in time. The alarm prompter can give an audible warning when an obstacle occurs. so that the blind person can walk comfortably with a walking stick. The subject of the prior art is to tell the visually impaired person about the height or depth of the obstacle. does not provide information. In addition, the prior art shows the difference between the visually impaired person and the disability. does not provide distance.

Purpose of the Invention Therefore, the object of the present invention is to determine the direction of walking for a visually impaired person. detect or measure the height or depth and distance of any obstacle to provide an intelligent guide device for

Description of the Invention For the above-mentioned purpose, for a visually impaired person according to claim 1, the walking direction is detecting the height or depth and distance of any obstacle on the or an intelligent guide device [hereinafter referred to as 'device'] can be reached by providing. According to one embodiment, the device emits laser beams for the visually impaired. A laser source connected to the device to produce An ultrasonic sensor provided next to the laser source to measure an output to warn of any obstacle in a walking direction It includes a mechanism and its feature is to reduce the angle between the laser source and the ultrasonic sensor. A gyroscope attached to the laser source to protect a camera to capture the image, processing the image captured by the camera Based on the image of the laser beam refracted from the obstacle, an image processing unit for the height or depth of the obstacle, the height of the laser source, and a laser beam path and An embedded system configured to calculate the angle between the ultrasonic sensor it contains.

Other applications are the subject of the dependent claims and/or the following specification sections. According to an exemplary implementation, the camera has a fixed focal length and a fixed screen. can be kept with resolution. The image of the emitted laser beam is a reference according to claims 3-8. can be caught for object or obstacle. Multiple horizontal images of the refracted laser beam pixel line (HPL) where the image processing unit is the laser line on the floor measuring the HPL number between the laser line on the reference object or obstacle and the ratio of the HPL number measured for the reference object to the height of the reference object. configured to 'calculate an HPL height using stored in the embedded system. The height of the laser source from the ground and the laser beam path A vertical scaling factor is obtained from the angle between the angle and the ultrasonic sensor.

According to another implementation, the embedded system also provides an HPL for the reference object. height of the laser line on the ground and the laser line 'over the obstacle' the height of the obstacle based on the HPL number and vertical scaling factor between or is configured to calculate its depth. The embedded system also provides the following formula configured to calculate the height or depth of the obstacle using h is the height or depth of the obstacle; Lr is an HPL height for the reference object; The N90 is the HPL between the laser line on the ground and the laser line on the obstacle. is the number; and V is the vertical scaling factor.

According to an exemplary application, the embedded system also allows the laser source to be removed from the ground. walking based on the height and the angle between the laser beam path and the ultrasonic sensor. direction is configured to 'measure the distance of the above obstacle from the device'. obstacle, a floor may include a hole in the ground, a bump in the ground, or any object in the ground. but not angry with them.

Furthermore, the direction of laser beam refraction is determined by whether the obstacle is a pit or a bump. can provide information about what is happening. The embedded system also It is configured to calculate the depth. The depth of the obstacle is the amount of the laser beam refracted from the obstacle. image, the height of the laser source and the ultrasonic sensor via the laser beam. determined based on the angle between

Other benefits, objects and features of the present invention are examples of components of the invention. will be explained through the following explanation of the attached figures. At least the function Components and method of devices that are essentially overlapping inventions are in the same reference may be marked with , where such components may be marked in all figures or does not have to be disclosed.

The invention is described by way of example only, according to the accompanying figures below.

Brief Description of Figures Figure 1 shows the block of an intelligent guide device for the visually impaired according to the present invention. shows the diagram; Figure 2, intelligent guide for visually impaired people without barrier according to the present invention shows a graphical representation of the device's function; and Figure 3, intelligent guide for visually impaired people with disability according to the present invention It shows a graphical representation of the device's function.

Detailed Description of Figures Figure 1 shows the block of an intelligent guide device for the visually impaired according to the present invention. shows the diagram (100). According to an exemplary application, an intelligent guide device for the visually impaired The processing unit 105 includes an embedded system 106 and a power supply 107.

According to one embodiment, the laser source 101 is attached to the device and provided to generate the laser beam, where the generation of the laser beam is focused on the person's walking path. Ultrasonic in an application The sensor (104) is connected to the laser source (101) to measure the height of the laser source (101) from the ground. (101) is supplied next to it. In one embodiment, the output mechanism 108 provides a It can warn about any obstacle (109) on the walking direction.

According to another embodiment, the gyroscope (102) is equipped with a laser source (101) and an ultrasonic sensor (104). It is attached to the laser source (101) to maintain the angle between Camera in one app (103) provided to capture an image of the laser beam refracted from the obstacle 109. Image The processing unit 105 is provided to process the image captured by the camera 103.

According to another embodiment, the embedded system 106 has the image of the refracted laser beam, the laser the height of the source (101) and the distance between the laser beam and the ultrasonic sensor (104). to calculate the height or depth of the obstacle (109) based on the angle is configured. The power supply (107) is provided to power the device. in an app The output mechanism (108) is a device, such as a loudspeaker, to alert the visually impaired person, or may be a Vibrator or a combination thereof.

Figure 2 shows the function of the device for visually impaired persons without hindrance according to the present invention. shows the graphic representation 200 . According to an exemplary embodiment, the function of the device is to extract the laser from the laser source (101). It starts with the transmission of the heat. When the laser beam touches the ground (202), the laser beam is projected onto the flat path (204) may break due to malfunction. Camera (103) displays the refracted laser beam (206) (207) can be configured to capture. The camera (103) has a fixed focal length and a fixed with screen resolution. That is, the angle of view (203) of the camera (103) is constant. is kept. The angler (201) between the laser beam path (204) and the ultrasonic sensor (104) It is kept at a constant value by holding the source (101) above the gyroscope (102). Gyroscope (102), causes the laser source (101) to move to keep the angle (201) 'oi' constant. Laser beam distance (204a) of path (204) from source to ground (202) trigonometry equation can be calculated using The distance (204a) of the laser path (204), the laser beam path (204), and 'oi' (201) from the angle between the ultrasonic sensor (104) and the laser source (101) from the ground 'h' (205) can be measured from height (202).

From the above equation, a vertical scaling factor 'V' can be calculated. So laser The vertical scaling factor is obtained from the angle (201) between the ultrasonic sensor (104). According to an exemplary embodiment, the refracted laser captured by the camera 103 view of the beam (206) (207) to find the height or depth of the obstacle (109) it gets wet. The height or depth of the obstacle (109) for a reference object with the obstacle (109) calculated based on the comparison of laser beam refraction. reference object, It can be an object of known height or depth. Reflected laser beam (206) image (laser on ` The number of HPL between the line and the laser line on the reference object, image processing It is measured using the unit (105). Furthermore, with the laser line on the floor 202 The number of HPL between the laser line on the reference object corresponds to the embedded system (106) transmitted. Here, an HPL height from the ground (202) for a reference object, reference It is calculated based on the height of the object and the HPL number. well 1H_Nrh-pl Where Nrhpi is the HPL number, Hr is the height or depth of the reference object, and Hrhp. from the ground ( is stored.

Figure 3 shows the function of the device for visually impaired persons with the disability according to the present invention. shows the graphic representation 300 . According to an exemplary embodiment, the image 207 of the refracted laser beam 206 is obstructed. (109) is processed for. Laser on the obstacle (109) with the laser line on the ground (202)' The number of HPL between the line of the line is measured using the image processing unit (105). Ground HPL between the laser line on (202) and the laser line on the obstacle (109) number is transmitted to the embedded system (106). The embedded system (106) also provides a reference object. Depending on the HPL height, the laser line on the ground (202) and the laser on the obstacle (109) based on the HPL number and vertical scaling factor between the line of the obstacle. (109) can be configured to calculate its height or depth.

According to a preferred embodiment, the height and depth of the obstacle (109) are defined by the following formula: is calculated using h' = Hrhpl X Nohpl X V ho is the height or depth of the obstacle (109); Hmpi is an HPL height for the reference object; Nohp., between the laser line on the ground (202) and the laser line on the obstacle (109) is the HPL number; and V is the vertical scaling factor. According to an exemplary embodiment, the embedded system 106 furthermore Based on the angle 'G, (201) between (104), the obstacle on the walking direction (109) It is configured to 'measure its distance from the device. The obstacle (109) is a pothole on a road, includes a bump in the road or any object on the ground (202). Laser beam information about the direction of the break, whether the obstacle (109) is a pit or a bump it provides. Therefore, for the bump and pit, the direction of the refracted laser beam 206 is opposite to each other.

If the obstacle (109) is a pothole, the embedded system (106) will also can be configured to calculate the depth. Depth of obstacle (109), from obstacle (109) and based on the angle (201) between the laser beam path (204) and the ultrasonic sensor (104) determines. Method of calculating the depth of the obstacle (109), the height of the obstacle (109) similar to the calculation. In addition, the device cannot be placed on a person's body, such as a belt or the like. It can also be the way you can wear it. Similarly, devices such as walking sticks, guides, umbrellas, etc. It can also be combined with any accessory such as

Thus, the present invention relates to an intelligent guide device for the visually impaired, wherein the device is a laser source (101), a laser source (101) provided next to it. ultrasonic sensor (104) warns the visually impaired person about any obstruction (109) a gyroscope (102) attached to the laser source (101), for capturing an image 207 of a laser beam 206 refracting through the obstacle 109. The camera (103) uses an image to process the image captured by the camera (103). The processing unit (105) displays the refracted laser beam (207), the laser source (101) height (205) and the angle between a laser beam path (204) and the ultrasonic sensor (104). An embedded object configured to calculate the height of the obstacle (109) based on (201) The system includes 106.

Claims (14)

REQUIREMENTS A laser source (101) attached to the device for generating the laser beam; an ultrasonic sensor (104) provided near the laser source (101) for measuring the height (205) of the laser source (101) above the ground (202); It is an intelligent guidance device for the visually impaired that includes an output mechanism (108) to alert the visually impaired person about any obstacle (109) in a walking direction, its feature is to maintain the angle between the laser source (101) and the ultrasonic sensor (104) a gyroscope (102) attached to the laser source (101) for a camera (103) for capturing an image (207) of a laser beam (206) reflecting off the obstacle (109); an image processing unit (105) for processing the image captured by the camera (103); An embedded system (which is configured to calculate the height or depth of the obstacle 109) based on the image (207) of the refracted laser beam, the height (205) of the laser source (101), and the angle (201) between the laser beam path (204) and the ultrasonic sensor (104). 106) is included. The intelligent guide device according to claim 1, wherein the camera (103) is held with a fixed focal length and a fixed screen resolution. The intelligent guidance device according to claim 1, wherein the image (207) of the refracted laser beam (206) is captured for a reference object or obstacle (109). Measuring the HPL number between the laser line on the ground 202 and the laser line on the reference object or obstacle 109, where the image 207 of the refracted laser beam 206 contains multiple horizontal pixel lines (HPL) and the image processing unit 105 The intelligent guide device according to claim 3, wherein it is configured to transmit the HPL number to the embedded system (106). The intelligent guide device according to claim 4, wherein the HPL height is stored in the embedded system (106), wherein the image processing unit (105) is further configured to calculate an HPL height using the ratio of the HPL number measured for the reference object to the height or depth of the reference object. The intelligent guiding device according to claim 5, wherein a vertical scaling factor is obtained from the height (205) of the laser source (101) above the ground (202) and the angle (201) between the laser beam path (204) and the ultrasonic sensor (104). Claim 6, where the embedded system (106) is also configured to calculate the height or depth of the obstacle (109) based on an HPL height for the reference object, the HPL number between the laser line on the ground (202) and the laser line on the obstacle (109), and the vertical scaling factor. or intelligent guide device. The embedded system (106) is also where ho is the height or depth of the obstacle (109); Hmpi is an HPL height for the reference object; Nohpmin is the HPL number between the laser line on the ground (202) and the laser line on the obstacle (109); The intelligent guide device according to claim 7, wherein V is the vertical scaling factor, configured to calculate the height or depth of the obstacle (109) using the formula ho = Hrhpl x Nota-pl X V. The intelligent guidance device according to claim 1, wherein the embedded system (106) is further configured to measure the distance of the obstacle (109) on the walking direction from the device based on the height of the laser source (101) above the ground (202). The intelligent guidance device according to claim 1, wherein the obstacle (109) comprises a pothole on a road, a bump in the road and any object on the ground (202). The intelligent guidance device according to claim 1, wherein the direction of laser beam refraction provides information as to whether the obstacle (109) is a pit or a bump. The intelligent guide device according to claim 1, wherein the output mechanism (108) is a device such as a loudspeaker or a Vibrator or a combination thereof for alerting the visually impaired person. 13. The intelligent guide device according to claim 1, wherein the device is wearable on the person's body. 14. The intelligent guide device according to claim 1, wherein the device is combined with accessories including a walking stick, a guide, an umbrella and a shoe.