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Arrangement and method for measuring the speed of sound

A technology of sound velocity and generating device, which is applied in the direction of measuring device, measuring propagation velocity, measuring ultrasonic/sonic wave/infrasonic wave, etc. It can solve problems such as time delay is not constant, achieve the effect of improving accuracy and eliminating uncertainty

Inactive Publication Date: 2003-11-05
ADDEST TECHNOVATION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the time delay is not constant for sound velocity measurements in different rounds / occasions

Method used

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  • Arrangement and method for measuring the speed of sound
  • Arrangement and method for measuring the speed of sound
  • Arrangement and method for measuring the speed of sound

Examples

Experimental program
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Embodiment Construction

[0063] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

[0064] Figure 4 A device 400 for measuring the velocity of sound in air is shown with a personal computer (PC) 401 comprising a sound card 402 as electrical pulse generating means and velocity determining means.

[0065] According to this embodiment, only standard PC accessories / components are used in the device, specifically, such as sound cards, amplifiers and speakers, and non-standard PC accessories / components, such as other PC plug-in cards are not used , an external unit with a PC interface, and an ultrasonic detector.

[0066] Note that using the sound card 402 of the personal computer 401 for generating the output electrical pulse signal 404 means that the output electrical pulse signal 404 will be in the audible frequency range, i.e. 20 Hz to 20,000 Hz, and not in the ultrasonic frequency range, i.e. high at 20,000Hz.

[0067] In this case, ...

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PUM

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Abstract

The invention relates to an arrangement for measuring the speed of sound, the arrangement comprising: an electrical pulse generating means (402) for generating an output electrical pulse signal (404), a transmitting transducer (403) for converting said output electrical pulse signal (404) into an output acoustic pulse signal (405), a reflector (407) for reflecting said output acoustic pulse signal (405), thereby producing a reflected acoustic pulse signal (409), a receiving transducer (408) being arranged such as to receive said output acoustic pulse signal (405) transmitted directly from said transmitting transducer and said reflected acoustic pulse signal (409) reflected by said reflector, wherein said receiving transducer converts the received output acoustic pulse signal (405) into a reconstructed output electrical pulse signal (410) and the reflected acoustic pulse signal (409) into a reconstructed reflected electrical pulse signal (411), a speed determination means for determining the speed of sound (412) using the reconstructed output electrical pulse signal (410) and the reconstructed pulse signal (411).

Description

technical field [0001] The present invention relates to the measurement of the velocity of sound. More specifically, the present invention relates to methods and apparatus for measuring the speed of sound based on the travel time of an acoustic signal through a predetermined distance. Background technique [0002] figure 1 A prior art apparatus 100 and method for measuring the velocity of sound is shown, as described in US 4,926,395. [0003] The control module 101 generates an output electrical pulse signal 102 . The instant when the event starts, that is, the instant when the output electrical pulse signal 102 is generated is represented by t1. The output electrical pulse signal 102 is sent to the transmit converter 103 . [0004] The transmit converter 103 converts the output electrical pulse signal 102 into an acoustic pulse signal 104 . [0005] Next, the acoustic pulse signal 104 output by the transmission transducer 103 passes through a medium 105, such as air or...

Claims

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Application Information

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IPC IPC(8): G01H5/00
CPCG01H5/00Y10S367/902
Inventor 陈家才吴剑丹贺国强
Owner ADDEST TECHNOVATION
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