The factors to affect the ultrasonic distance transducer

By influencing of incident angle,When is measuring the ultrasonic distance sensor between the surface and the point, there is a geometric angle between the measured object and the transmitting head and the receiving head. That is the angle of incident and echo of the reflected wave of distance measuring transducer. When the angle is not 90°, the distance measurement by the system is an obstacle. The distance transducer is between object and transducer rather than the distance between ultrasonic distance detection transducer causes measurement error. When the distance transducer between obstacles is small, this error will become the main source of error at the close distance. You can use geometric relations to eliminate errors.

Elimination of interference signals in blind areas

When the transmitter head and receiver head of ultrasonic range sensor datasheet are close together, the transmitter head will directly crosstalk to the receiver head and an erroneous measurement result will occur. Therefore, it must be hidden. The period from the start of the emission of distance measurement sensor duntil the end of the "false reflection wave" can be taken and the mask can be interrupted by software, which can effectively eliminate the interference.

Through the above methods combined with experimental data, we can see that this method can effectively improve the measurement accuracy of Long range ultrasonic distance transducer, provided that reliable environmental information for the autonomous navigation algorithm of mine rescue robots, and make it more effective to avoid obstacles. Greatly improving the robot's ability to avoid obstacles.