Sound velocity tester based on Internet of things

Abstract

The invention discloses a sound velocity tester based on Internet of things. The sound velocity tester based on Internet of things comprises a baffle plate, fixed double rods, an emitting transducer,a receiving transducer, positioning double rods, a Bluetooth displacement detection mechanism, a motor, a motor control connector, an emitting transducer input interface, a receiving transducer outputinterface, a soft isolating washer, a limiting switch group, a cover plate and a lead screw. The sound velocity tester has the beneficial effects that Internet of things orientation of a product is achieved; a test experiment related to sound velocity is finished through a network, so that the experimental efficiency is improved; for schools or the public without experimental facilities, relatedsound velocity test experiments can be finished through a computer. A digital display grating ruler display detection design based on Bluetooth transmission eliminates the problem of poor return stroke caused by a conventional lead screw reading structure, so that the experimental precision is improved. The transducer driving structure is transmitted by mean of the double rod positioning lead screw, so that the transmission gap is reduced greatly, and the operating stability o the device is improved; soft connection is adopted, so that interference of a resonant signal is avoided effectively.

Description

technical field [0001] The invention relates to the field of experimental devices, in particular to a speed of sound measuring instrument based on the Internet of Things. Background technique [0002] The determination of the speed of sound is mainly to observe and study the propagation of sound waves in different media, and to measure the propagation speed of sound waves in these media. The traditional speed of sound measurement experiment mainly changes the position between the transducers by manually shaking the screw, reads the displacement data through the drum or vernier caliper, and then uses the phase method or time difference method to measure according to the waveform changes of the signal generator and oscilloscope. speed of sound. Due to the hysteresis of the screw drive, there is a problem with the reading accuracy of the displacement. The hysteresis problem can only be avoided by continuous transmission in one direction and multiple measurement data. For the ...

AI Technical Summary

Problems solved by technology

For the above reasons, it is difficult to automate the measurement of the velocity of sound

In addition, since the experiment can only be completed in the laboratory, the students' preview is generally realized through the experimental handouts or simulation software, and the experience effect is poor; for schools or the public that have not purchased experimental facilities, it will be impossible to complete the relevant sound velocity measurement experiment

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