Automatic standing wave experiment instrument

Abstract

The invention discloses an automatic standing wave experiment instrument, which is characterized in that a loudspeaker is arranged on one end in a transparent round pipe and is connected with an audio signal generator assembled outside, and the other end of the transparent round pipe can reflect sound waves to form standing waves. A microphone driving device driven by a drive motor is arranged in the transparent round pipe, a standing wave experiment microphone is connected with a microphone signal amplifier, the microphone signal amplifier is connected with an output socket, the drive motor is driven by controlling a forward or backward rotating switch and a singlechip keyboard to change the position of the microphone, and thus, the automatic standing wave experiment instrument can quickly and exactly find the positions of nodes or loops of standing waves to measure parameters or sound velocity of sound standing waves under different air pressures. The automatic standing wave experiment instrument solves the problem that traditional sound velocity measuring instruments do not have functions of automatic adjustment, intelligent adjustment and intelligent reading, and cannot be used for performing experiments about relationship between sound velocity and air pressure. The automatic standing wave experiment instrument can be used for performing sound velocity measuring experiments or physics demonstration experiments in colleges.

Description

technical field [0001] The invention relates to a physical experiment instrument, in particular to an automatic standing wave experimental instrument for the physical experiment. Background technique [0002] The measurement of the speed of sound and the demonstration of the standing wave phenomenon are two very important experimental items in physical experiments, and the experimental methods are various. The commonly used experimental method for the demonstration of the standing wave phenomenon is carried out by mechanical and mechanical methods. The experimental equipment is large in size and troublesome to operate; the ultrasonic sound velocity measuring instrument is the most popular in domestic universities for the measurement of sound velocity, but it is manually adjusted during the experiment. Automatic control, not to mention the intelligent control of single-chip microcomputer, and the sound velocity is measured under normal pressure conditions, and the experimenta...

AI Technical Summary

Problems solved by technology

The commonly used experimental method for the demonstration of the standing wave phenomenon is carried out by mechanical and mechanical methods. Automatic control, not to mention the intelligent control of single-chip microcomputer, and the speed of sound is measured under normal pressure conditions, and the experimental content under high-pressure or low-pressure abnormal conditions cannot be done, and the experimental method is single

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