Measurement instrument for dynamic parameters of piezoelectric transducer, and measurement methods for measurement instrument

A piezoelectric transducer and measurement method technology, applied in frequency measurement devices and other directions, can solve problems such as low accuracy and limited acquisition frequency, and achieve the effects of ensuring accuracy, expanding frequency measurement range, and improving measurement accuracy.

Inactive Publication Date: 2012-07-11
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This solution needs to purchase an additional acquisition card, and because the acquisition circuit and the signal generation circuit are not on the same circuit board, but the signal is collected to the acquisition card through a long wire, and then transmitted to the computer after being processed by the acquisition card, thus causing Its accuracy is not high, and the acquisition frequency is limited

Method used

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  • Measurement instrument for dynamic parameters of piezoelectric transducer, and measurement methods for measurement instrument
  • Measurement instrument for dynamic parameters of piezoelectric transducer, and measurement methods for measurement instrument
  • Measurement instrument for dynamic parameters of piezoelectric transducer, and measurement methods for measurement instrument

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Embodiment Construction

[0059] The piezoelectric transducer dynamic parameter measuring instrument and measuring method of the present invention will be described in detail below in conjunction with the embodiments and accompanying drawings.

[0060] The piezoelectric transducer dynamic parameter measuring instrument and measuring method of the present invention collect the original voltage and current signals into the computer through the AD acquisition chip, process the phase difference and amplitude with signal processing methods such as FFT and correlation coefficient method, and set the Digital potentiometer or DIP switch to adjust the measurement resistance. This ensures the accuracy of phase difference processing, improves the measurement accuracy of the dynamic parameters of the piezoelectric transducer, and expands its frequency measurement range.

[0061] Such as image 3 As shown, the piezoelectric transducer dynamic parameter measuring instrument of the present invention is composed of a...

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Abstract

The invention discloses a measurement instrument for dynamic parameters of a piezoelectric transducer, and measurement methods for the measurement instrument. The measurement instrument comprises a micro controller, a sine signal generation circuit, and the piezoelectric transducer which are sequentially connected, an analog-to-digital conversion circuit which is connected with the output ends of the sine signal generation circuit and the piezoelectric transducer respectively, and a measurement resistance unit which is connected between the output end of the piezoelectric transducer and the input end of the sine signal generation circuit; and the output of the analog-to-digital conversion circuit is connected with the micro controller which is connected with a personal computer (PC) through a universal serial bus (USB) interface. The measurement methods comprise a measurement method for the PC, and a measurement method for the micro controller in a lower computer. According to the measurement instrument, double functions of power supply of the USB interface and signal transmission are fully utilized, and the circuit design is simplified. A measurement resistor connected with a five-gear digital switch is arranged in the circuit, so if a digital potentiometer cannot work normally, the measurement resistor can be used through the arrangement of a wire jumper, and the resistances are switched through the digital switch.

Description

technical field [0001] The present invention relates to one. In particular, the utility model relates to a piezoelectric transducer dynamic parameter measuring instrument and a measuring method used for casing well ultrasonic plugging removal operations and acoustic logging instruments in petroleum engineering operations. Background technique [0002] In ultrasonic operation and acoustic logging tools, the dynamic parameters of the transducer are the key factors that determine the effect of ultrasonic operation and the efficiency of sound wave emission, and they need to be effectively measured. Zhang Qiang, Qu Min, Shen Jianguo, Design and Realization of Piezoelectric Crystal Admittance Circle Measuring Instrument (Piezoelectricity and Acousto-Optics, 2005, 27(1), 21-23) published a piezoelectric transduction method based on simulation method Measuring methods and instruments for dynamic parameters of the device. The principle of its signal acquisition system is as follows...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R23/02
Inventor 沈建国聂建华袁金库
Owner TIANJIN UNIV
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