Ranging method for unmanned aerial vehicle equipped with ultrasonic transducer

Views: 7 Author: Site Editor Publish Time: 2018-08-18 Origin: Site

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The UAV ranging transducer system described in this paper applies to the principle of ultrasonic distance measurement, and uses the measurement ultrasonic wave to transmit pulses.
The time difference between the wave and the received pulse wave has the relative position is calculated by the speed at which the ultrasonic wave travels in the air distance. There are two piezoelectric wafers and a resonance plate inside the ultrasonic generator. When the two poles are applied with pulse signals .When the frequency is equal to the natural oscillation frequency of the piezoelectric wafer, the piezoelectric wafer will resonate and drive the resonant plate vibration.Moving to generate ultrasonic waves similarly, when the resonator plate receives ultrasonic waves, it will compress the piezoelectric wafer vibration, the mechanical energy is converted into electrical signals, the principle of Ultrasonic range finding sensor is shown.

By measuring the distance h between the transmitting device and the receiving device, and using a right triangle, the distance can be determined.the ranging data of time in the range of 10m is more than enough for the single-chip processing. Therefore,ultrasonic distance sensor transducer is using the ultrasonic component is easy to implement. The actual measurement work of the transmission line, first of all, which does not have too high requirement for the measurement . Secondly, the distance value to be measured is generally not too large. This is because the value is required for ultrasonic measurement transducer is inevitably smaller than the line value at that point, and the hidden danger with the large clearance of the wire can be supplemented by other measurement methods. Therefore, it is feasible to use 125KHz ultrasonic proximity sensors to measure transmission conductors and offline obstacles.

Ranging method for unmanned aerial vehicle is equipped with ultrasonic components. The ultrasonic distance measuring transducer is installed vertically below the four-rotor airborne platform, and is sent to the lower object to be tested. Adding a camera is horizontally forward so that ground control personnel can fly. The angle of the aircraft is controlled by flight. At the same time, the front of the drone can also be designed with an ultrasonic sensor double sheet detector , real-time measurement of the horizontal distance between the aircraft and the wire. The drone is equipped with an ultrasonic component to measure the transmission line.The large square barrier is based on the rectangular equilateral theorem.

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When is using the drone to measure the distance between trees and conductors, the clearance distance of the conductor 10 to the tree 30 during the measurement, the drone 20 flies over the tree 30 and hoveres at the position equal to the overhead conductor flying at this time, the drone 20 and the overhead conductor offers 10 maintain a safe distance L, which can be based on
the actual situation is specifically determined underwater depth sounder transducer. The operator observes the feedback from the video capture device 23 of the drone frequency information,it is controlling the flight state of the drone 20 to be kept at the same position as the overhead conductor stop flying. The video capture device can be a camera, and the camera can be horizontally mounted on the drone 20 in front.

The distance measuring device of the drone 20 transmits a detection signal vertically downward to measure the fuselage of the drone.The vertical distance of the tree below the measurement data is transmitted to the ground in the real time through the wireless transmitter .

The distance measuring device is an ultrasonic distance measuring transducer and can be installed directly below the drone. The crew can also control the drone 20 to fly along the length of the overhead conductor . When is measuring a tree barrier at some point,The inspector controls have drone to select three hover points for measurement on the same level as the measuring phase .The point measurement records 10 stable data, and finally the average of the 30 measurement data is obtained, and the obtained data is approximated.It is considered that the tree barrier below the phase conductor is clear. Because the drone flies to the same height as the overhead conductor, the measurement is not vertical distance between the man-machine itself and the tree below, according to the rectangular equilateral theorem, the data obtained is the measuring photo frame.The minimum clearance distance between the empty wire and the tree below.