Ultrasonic sensors in air

Mágori, V.

doi:10.1109/ultsym.1994.401632

Cited by 61 publications

(34 citation statements)

References 10 publications

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“…Besides, use of IR proximity sensor makes it difficult for the robot to avoid collision with dynamic object as well static object because if the object appears suddenly infront of the robot, time delay to receive the signal by IR receiver from the IR trnsmitter and also the time delay to send signal to microcontroller makes it difficult to achieve desired performance from the line following robot which is to stop its movement instantaneously by avoiding collision. In order to get rid of this problem, we have used ultrasounic sensor which best serve the purpose of detecting and avoiding collision with the object.We have preferred to use Ultrasonic Sensor attached with the line follower robot to detect presence of both static and dynamic object.Ultrasonic sonar sensors actively transmit acoustic waves and receive them later [7]. It is performed by ultrasonic transducers,which transform an electrical signal into an ultrasonic wave and vice versa [7].Ulrasonic sonar sensors are of two types depending on how ultrasonic signal has been changed in its path from trnsmitting transducer to receiving trnsducer [7].…”

Section: Obstacle Detection and Avoiding Collisionmentioning

confidence: 99%

“…In order to get rid of this problem, we have used ultrasounic sensor which best serve the purpose of detecting and avoiding collision with the object.We have preferred to use Ultrasonic Sensor attached with the line follower robot to detect presence of both static and dynamic object.Ultrasonic sonar sensors actively transmit acoustic waves and receive them later [7]. It is performed by ultrasonic transducers,which transform an electrical signal into an ultrasonic wave and vice versa [7].Ulrasonic sonar sensors are of two types depending on how ultrasonic signal has been changed in its path from trnsmitting transducer to receiving trnsducer [7]. They are: 1) Distance sensor(reflection) and 2) the propagation sensor.…”

Section: Obstacle Detection and Avoiding Collisionmentioning

confidence: 99%

See 1 more Smart Citation

An autonomous industrial robot for loading and unloading goods

Kadir

Chowdhury

Rashid

et al. 2015

2015 International Conference on Informatics, Electronics &Amp; Vision (ICIEV)

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AcknowledgementWe would like to take this opportunity to express our gratitude and appreciation to Dr. KhalilurRahman for his guidance, relentless help and instructions that he has provided us from the time we have started doing thesis under his supervision through the completion of our undergraduate program. The skills and ideas we have been able to learn from him during our Thesis work have benefited us immensely and will continue to do so throughout our future endeavors. | P a g e AbstractIn industries loading and unloading of heavy loads manually is one of the most imporant task which turns out to be quite difficult, time-consuming and risky for humans.In this modern era robots are being developed for various purposes to accomlish many tasks which seem to be too complex for humans. Benefits of using robots, for industrial purpose have been immense in terms of speed and efficiency of doing required tasks compare to that of humans. The paper illustrates the mechanical design of the industry based automated robot which include: Ackerman Steering Mechanism and Differential Mechanism.Ackerman Steering allows front two wheels to turn left and right in the track without going out of the track.Differential has been mounted with two back wheels and a DC motor has been used with its controller to start motion of the robot. This industrial robot has got three features and they are: Path-Tracking, Avoiding Collision, Loading and Unloading heavy industrial goods. The autonomous robot is designed to start its movement from a starting position where goods are loaded on it, then follow a path of white line drawn on black surface and unload goods by itself after reaching a destination place. Digital Line Following sensor has been mounted infront of the robot so thar the sensor can detect path by emitting and receiving signals alowing it to move in the pre-defined track having left and right turns while carrying goods from starting position to the destination. Arduino Uno has been used for programming and the required control circuit of the robot has been designed for controlling the robot's movement within the defined path. Relay Switches have been used to control the braking, and actuator movement during left and right movement of the industrial robot. The main aim is to load and unload heavy goods that has been achieved by two large linear actuators for producing required torque and force necessary to unload heavy loads (up to more than 150kg) sideways to the ground safely.Besides, the robot has been built up having the ability to avoid collision with any obstacles that come in its way. Ultrasonic sensor has been attached with the robot to send the signal and detect the presence of any obstacle that may appear in its path and stop momentarily for certain time until the obstacle move away. Building an industrial robot with moderate Speed, good Efficiency for loading and unloading purpose within a short time to ease human suffering has been the main focus of this paper. | P a g e

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Section: Obstacle Detection and Avoiding Collisionmentioning

confidence: 99%

Section: Obstacle Detection and Avoiding Collisionmentioning

confidence: 99%

An autonomous industrial robot for loading and unloading goods

Kadir

Chowdhury

Rashid

et al. 2015

2015 International Conference on Informatics, Electronics &Amp; Vision (ICIEV)

View full text Add to dashboard Cite

show abstract

“…However, the high attenuation in air which increases with frequency is a great challenge (Magori, 1994;Yano, Tone & Fukumoto, 1987). It is reported that 1 MHz signal can theoretically measure distance up to 20 cm (Yano, Tone & Fukumoto, 1987), while 2 MHz signal can measure up to few centimeters (Noble et al, 1995).…”

Section: Ultrasonic Sensing (Us)mentioning

confidence: 99%

MEMS Biomedical Sensor for Gait Analysis

Wahab¹,

Bakar²

2011

Biomedical Engineering, Trends in Electronics, Communications and Software

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“…Ultrasonic transducers [1] are widely used to acquire target information such as position and motion [2][3][4][5] and medium information such as the speed of sound and attenuation [6][7][8][9], and for nondestructive testing [10][11][12][13]. In particular, the distance to a target is typically measured using an echo reflected from the target, i.e., the pulse-echo method.…”

Section: Introductionmentioning

confidence: 99%