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Synchronous data acquisition system and acquisition method based on LabVIEW and sound card

A technology for synchronizing data and acquisition systems, applied in the re-radiation of sound waves, radio wave measurement systems, and utilization of re-radiation. , the effect of simple equipment

Inactive Publication Date: 2017-05-10
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0006] For above-mentioned deficiencies in the prior art, the object of the present invention is to provide a kind of synchronous data acquisition system and acquisition method based on LabVIEW and sound card, to solve the problems such as expensive data acquisition device in the prior art, poor versatility

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  • Synchronous data acquisition system and acquisition method based on LabVIEW and sound card
  • Synchronous data acquisition system and acquisition method based on LabVIEW and sound card

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Embodiment Construction

[0023] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the embodiments and accompanying drawings, and the contents mentioned in the embodiments are not intended to limit the present invention.

[0024] refer to figure 1 Shown, a kind of synchronous data acquisition system based on LabVIEW and sound card of the present invention comprises: LabVIEW upper layer controller, sound card (adopting PC sound card), loudspeaker, sound sensor; The sensor is connected; the upper controller of LabVIEW generates a coded signal, controls the digital-to-analog converter (D / A) of the sound card to transmit the data in the form of sound waves, and the speaker increases the amplitude of the above-mentioned sound wave signal; the sound sensor receives the echo sound signal and converts it When the amplitude is attenuated to a certain value, the upper controller of LabVIEW controls the analog-to-digital...

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Abstract

The invention discloses a synchronous data acquisition system and acquisition method based on LabVIEW and a sound card. The acquisition system comprises a LabVIEW upper-layer controller, the sound card, a loudspeaker, and a sound sensor, the sound card is connected with the LabVIEW upper-layer controller, the loudspeaker, and the sound sensor, the LabVIEW upper-layer controller generates a coding signal, an analog-to-digital converter for controlling the sound card transmits the data in a sound wave manner, the loudspeaker increases the amplitude of the sound wave signal, the sound sensor receives the echo sound signal and attenuates the amplitude to a certain value, and the LabVIEW upper-layer controller controls the analog-to-digital converter of the sound card to read the echo data and display the data after real-time processing. The most critical synchronization control technology is adopted in the data acquisition process to replace an expensive data acquisition device, the cost is low, the operation is simple, the versatility is high, and the acquisition system and acquisition method have wide application prospects in the fields of industrial automation, and test and measurement.

Description

technical field [0001] The invention belongs to the technical field of industrial automation and testing and measurement, and specifically refers to a synchronous data acquisition system and acquisition method based on LabVIEW and a PC sound card. Background technique [0002] At present, DSP technology is very mature. PC sound card is an excellent data acquisition system, which integrates A / D conversion, D / A conversion, sample and hold circuits, and can realize dual-channel 16-bit data acquisition for audio signals. Quantization accuracy up to 2 16 =65536, the maximum sampling rate can reach 44.1KHz, so the sound card can be regarded as a dual-channel 16-bit data acquisition card working in the audio frequency range (20Hz to 20KHz). This can meet the requirements for many engineering measurements and scientific research experiments. [0003] The LabVIEW software developed by NI Corporation of the United States takes "software is the instrument" as its purpose, and is main...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S15/02G01S7/52
CPCG01S15/02G01S7/52
Inventor 戴晶晶杨东林卢智聪徐大专
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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