Ultrasonic Navigation System for the visually impaired & blind pedestrians (original) (raw)
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Indoor Navigation for Blind User using Ultrasonic Obstacle Detection
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This paper presents a micro-controller based ultrasonic system developed to help the blind person navigate in closed spaces and be in contact with nearby traffic lights by sensing them and sending a signal for the traffic light to change to red signal. The system consists of two related but independent systems. The first one is a specially designed helmet with ultrasonic sensors which is equipped with RF circuit, and the second is a hand tool again equipped with ultrasonic sensors. The sensors are in the form of ultrasonic transmitters and receivers, and are configured to measure the distance to obstacles in-front of the sensor pair. The paper describes the design and testing of the system with blind people.
Guidance device for visually impaired people based on ultrasonic signals and open hardware
Visual impairment is a complex challenge that affects people of all ages, and it is estimated that around 2.2 billion people worldwide lack adequate access to medical treatment and support. In Latin America, there is a lack of attention to people with visual disabilities, evidenced by poor urban infrastructure and lack of compliance with inclusion laws. Some projects stand out for the use of prototypes with artificial vision technology, global positioning system (GPS) and smart canes. Therefore, the objective of the project is to use ultrasonic sensors and a low-cost electronic device coupled to canes, for obstacle detection and mobility using an open hardware embedded system. The results confirmed the efficiency in the detection and operation of the ultrasonic sensor by activating the light emitting diode (LED), the buzzer and the vibrating motor according to the programmed distances. Challenges were identified, such as adapting the sensor to the tilt of the cane and the importance of accurate calibration of the ultrasonic sensor. The system met its objectives by detecting objects in a range of 2 to 50 cm and providing sound alerts to improve the perception of blind people.
International Journal of Advance Research Ideas and Innovations in Technology
The fundamental point of this paper is to grow the electronic travel help for the visually impaired and outwardly debilitated people on foot by rising into the ultrasonic innovation. The paper speaks to an inventive task plan and execution of an Ultrasonic Navigation framework so as to furnish completely programmed deterrent evasion with capable of being heard warning for visually impaired people on foot. This visually impaired direction framework is protected, dependable and practical.
DSP-based ultrasonic navigation aid for the blind
IMTC 2001. Proceedings of the 18th IEEE Instrumentation and Measurement Technology Conference. Rediscovering Measurement in the Age of Informatics (Cat. No.01CH 37188), 2001
the principle of the binaural audio feedback are discussed. Also the operation and structure of the hardware are briefly introduced. Finally some measurement results on an experimental device are reported.
Development of an ultrasonic cane as a navigation aid for the blind people
2014 International Conference on Control, Instrumentation, Communication and Computational Technologies (ICCICCT), 2014
The current study deals with the development of an ultrasonic based cane for the navigation of the blind persons. The developed cane is able to detect both aerial and ground obstacles and potholes (drop-off). The ultrasonic signals are acquired in the Arduino microcontroller, classified and control signals are generated. The control signals are transmitted wirelessly to the receiving device, kept in the shoulder pocket. The receiving device consists of another Arduino microcontroller which triggers 3 speaker panel (worn around the chest) and 3 LED panel. The device works in the range of 5-150 cm and may be used as a navigational aid for the blind persons.
IJERT-Design and Implementation of Ultra sonic path Finder for the Blind
International Journal of Engineering Research and Technology (IJERT), 2014
https://www.ijert.org/design-and-implementation-of-ultra-sonic-path-finder-for-the-blind https://www.ijert.org/research/design-and-implementation-of-ultra-sonic-path-finder-for-the-blind-IJERTV3IS20632.pdf Visually impaired and fully blind people find navigation difficult as they often lack much needed information for bypassing obstacles and hazards in their path. In order to help blind people navigate safely and quickly a navigation aid based on efficient PIC16F877A microcontroller with synthetic speech output has been considered. The suggested system can sense the surrounding environment via sonar sensors and sending vibro-tactile feedback to the user of the position of closest obstacle in the range. GSM module is incorporated in the system for the assistance of blind people in case of emergency help. The proposed system is able to collect the position of blind by using GPS module and give information to the blind about walking routes. This system is able to provide information about overhanging obstacles within 4m ahead of the user.
This paper presents an electronic navigation system for visually impaired and blind people. This system understands obstacles around it and in front, left and right direction using a network of ultrasonic sensors. It effectively calculates distance of the detected object from the subject and prepares navigation path accordingly avoiding obstacles. It uses speech feedback to aware the subject about the detected obstacle and its distance. This proposed system uses AT89S52/LPC2148 microcontroller based embedded system to process real time data collected using ultrasonic sensor network. Based on direction and distance of detected obstacle, relevant pre-recorded speech message stored in Voice and play back circuit. Such speech messages are conveyed to the subject using speaker on voice and playback circuit.
Smart Walking Stick for Visually Impaired People Using Ultrasonic Sensors and Arduino
—This paper presents the smart walking stick based on ultrasonic sensors and Arduino for visually impaired people. There are approximately 37 million people across the globe who are blind according to the World Health Organization. People with visual disabilities are often dependent on external assistance which can be provided by humans, trained dogs, or special electronic devices as support systems for decision making. Thus, we were motivated to develop a smart white cane to overcome these limitations. We accomplished this goal by adding ultrasonic sensors at specific positions to the cane that provided information about the environment to the user by activating the buzzer sound. We proposed low cost and light weight system designed with microcontroller that processes signal and alerts the visually impaired person over any obstacle, water or dark areas through beeping sounds. The system consists of obstacle and moisture detection sensors for receiving, processing and sending signals to the alarm system which finally alerts the user for prompt action. The system was designed, programmed using C language and tested for accuracy and checked by the visually impaired person. Our device can detect obstacles within the distance of about 2m from the user. Keyword-Ultrasonic sensor, Arduino ATmega328 Microcontroller, Mobility aid, Visually Impaired Person, Alarm system I. INTRODUCTION Visually impaired people are the people who finds it difficult to recognize the smallest detail with healthy eyes. Those who have the visual acuteness of 6/60 or the horizontal range of the visual field with both eyes open have less than or equal to 20 degrees. These people are regarded as blind. A survey by WHO (World Health Organization) carried out in 2011 estimates that in the world, about 1% of the human population is visually impaired (about 70 million people) and amongst them, about 10% are fully blind (about 7 million people) and 90% (about 63 million people) with low vision according to [1]. The main problem with blind people is how to navigate their way to wherever they want to go. Such people need assistance from others with good eyesight. As described by WHO, 10% of the visually impaired have no functional eyesight at all to help them move around without assistance and safely. The figure 1 below is a chart showing the percent of blind people across the globe. This study proposes a new technique for designing a smart stick to help visually impaired people that will provide them navigation. The conventional and archaic navigation aids for persons with visual impairments are the walking cane (also called white cane or stick) and guide dogs which are characterized by a many imperfections. The most critical shortcomings of these aids include: essential skills and training phase, range of motion, and very insignificant information communicated been communicated. Our approach modified this cane with some electronics components and sensors, the electronic aiding devices are designed to solve such issues. The ultrasonic sensors, water sensor, buzzer, and RF transmitter/Receiver are used to record information about the presence of obstacles on the road. Ultrasonic sensor have the capacity to detect any obstacle within the distance range of 2cm-450cm. Therefore whenever there is an obstacle in this range it will alert the user. Water sensor is used to detect if there is water in path of the user. Most blind guidance systems use ultrasound because of its immunity to the environmental noise. With the rapid advances of modern technology both in hardware and software it has become easier to provide intelligent navigation system to the visually impaired.