The ultrasonic sensors

Ultrasonic sensorsUltrasonic sensors, also called ultrasonic rangefinders, are among the sensors to measure distances without contact. These sensors are particularly complementary infrared sensors, since, unlike them, they can monitor a wide conical. They are relatively well represented in the robotics community because of their good price / efficiency ratio. So, there are an increasing number of suppliers, with various models for various uses.

The ultrasonic range finder is based on measuring the time elapsed between emission and returning the echo. When the ultrasonic wave is emitted it spreads with speed of sound in the surrounding air, to 342 m / sec. Once an obstacle is encountered, the echo returns to the transducer which then calculates the elapsed time between transmission and receiving of the wave. These waves can not be heard by the human ear.

All rangefinders work the same way, regardless of the manufacturer. The differences will be within the frequencies transmitted, and the conical diffraction of the wave. Depending on the model, the ultrasonic sensors will be more or less accurate, and will have a greater or lesser extent. Their prices vary accordingly. Generally, the higher is the connical end, the sensor will be more precise, it will be more expensive. But as we shall see, some manufacturers have things differently

Robotics is the branch of technology that deals with the design, construction, operation, structural disposition, manufacture and application of robots. Robotics is related to the sciences of electronics, engineering, mechanics mechatronics, and software
  Title :   The ultrasonic sensors
  Category :   Sensors.
  Tags :   Distance Sensor,  ir range finder,  rangefinders,  robot distance sensor,  robots sensors,  ultrasonic range sensor,  ultrasonic rangefinders,  ultrasonic sensors, 

Robotics Short Story

The word robotics was derived from the word robot, which was introduced to the public by Czech writer Karel Čapek in his play R.U.R. (Rossum's Universal Robots), which premiered in 1921.

According to the Oxford English Dictionary, the word robotics was first used in print by Isaac Asimov, in his science fiction short story "Liar!", published in May 1941 in Astounding Science Fiction. Asimov was unaware that he was coining the term; since the science and technology of electrical devices is electronics, he assumed robotics already referred to the science and technology of robots. In some of Asimov's other works, he states that the first use of the word robotics was in his short story Runaround (Astounding Science Fiction, March 1942). However, the word robotics appears in "Liar!"

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