Meter Based on Ultrasonic to Measure
the Liquid-level
Abstract
According to an up in the air dissemination glint principle, with a wave changes the ability machine for connect a people's parts, apply a machine technique to carry on the diagraph to an up in the air dissemination time, thus designed an examination system. Thus carry out to have no contact the type measures to be apart from the system hardware is been shot the electric circuit, a wave by a machine of AT89C4051, a wave by the system to receive to enlarge the electric circuit, the environment temperature to collect the electric circuit and the manifestation electric circuits to constitute the Combine the as the to the it's the examined the principle, the method the and the system the software the structures the to the make the detailed introduction, the carry the on the temperature the repair the and the compute to the time the in the a wave the measuring the to the be apart the from the of the error margin revise, the discuss the exaltation to the measure the method of the be apart the from the accuracy, and put forward the processing method of the interference noise voice. Measured the reason of the error margin to carry on the analysis to the creation, and the path and the method that definitely put forward the understanding.
Key words: ultrasonic ranging; velocity of sound; microprocessor；Liquid-level; temperature compensate
