CN103278562A - Two-dimensional scanning system for measuring sound fields - Google Patents
Two-dimensional scanning system for measuring sound fields Download PDFInfo
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- CN103278562A CN103278562A CN2013101898135A CN201310189813A CN103278562A CN 103278562 A CN103278562 A CN 103278562A CN 2013101898135 A CN2013101898135 A CN 2013101898135A CN 201310189813 A CN201310189813 A CN 201310189813A CN 103278562 A CN103278562 A CN 103278562A
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Abstract
The invention discloses a two-dimensional scanning system for measuring sound fields. The two-dimensional scanning system comprises an ultrasonic transducer for emitting and receiving ultrasonic, an ultrasonic transducer driving module, a step motor displacement module, a signal acquisition module, a microcontroller controlling and processing module for controlling the movement of a step motor with an ultrasonic transducer probe by programming and processing acquired data, and a communication module. The two-dimensional scanning system disclosed by the invention can be used for performing fixed point measurement on each point on the surface of a solid measurement sample, data measured by the two-dimensional scanning system are combined with sound field characteristics to extract the critical characteristics of a signal, and three-dimensional measurement is simulated by a two-dimensional measuring method to form a two-dimensional transmission image and a dynamic sound wave transmission animation of the sound field, thereby facilitating accuracy analysis on detecting signals and well visualizing the change of signals in an ultrasonic transmission process. The signals can be applied to related research and analysis.
Description
Technical field
The present invention relates to a kind of d scanning system for the measurement sound field, be used for the detection of the whole dielectric surface ultrasonic signal of measurement, belong to acoustics and electronic communication field.
Background technology
In recent years, Ultrasonic NDT becomes the main detection means in each large-engineering safety detection gradually.For can better the analyzing and testing signal, we need extract the key feature of signal in conjunction with change of sound field rule in the examined medium with at the propagation condition of dielectric surface ultrasonic signal.So, sound field is measured, and graphical, will be conducive to us to the Accurate Analysis of detection signal, also can the variation of signal in the transonic process is visual well, be used for relevant researching and analysing.
Traditional acoustic field mainly is to carry out in water, obtain sound field in the water by 3-D scanning, but this method is not suitable for the solid-borne noise field measurement.
In addition, in the production, generally all volume is bigger for actual object of measurement, and the influence of a lot of noises and some uncertain factors is arranged during measurement, and these all are unfavorable for the extraction of characteristic signal.
Summary of the invention
The purpose of this invention is to provide a kind of system that can measure whole solid dielectric surface ultrasonic signal propagation condition, this system can realize the acoustic field with the two-dimensional analog three-dimensional.
The technical scheme that realizes the object of the invention is: a kind of for the d scanning system of measuring sound field, comprising:
Be used for transmitting and receiving hyperacoustic ultrasonic transducer, wherein, transmitting transducer adopts the strip piezoelectric ceramic piece that width is narrow, length is long, and the width of this strip piezoelectric ceramic piece and length ratio are controlled at 1:4 between the 1:6.
The ultrasonic transducer driver module drives ultrasonic transducer in order to enough power to be provided;
The stepper motor displacement module moves at transverse axis or the longitudinal axis by stepper motor driver control step motor, make transducer probe can mobile collection the ultrasonic sound field in a certain territory, surface, obtain the acoustic field signal data of this point;
Signal acquisition module is amplified the signal that collects by signal conditioning circuit, carries out the AD conversion again, transfers to microcontroller and handles;
The microprocessor controls processing module, the movement by programming to control the stepper motor that has ultrasound transducer probe and the data that collect are handled;
Communication module, the data after will handling by serial communication send back computer.
After adopting technique scheme, the present invention utilizes ultrasonic transducer, has the ultrasonic sound field in a certain territory, mobile collection surface of the stepper motor of ultrasound transducer probe by mcu programming control, obtains the acoustic field signal data of this point.Again signal is carried out computing and amplify also numeral output.Finally in conjunction with serial communication, the data that measure are sent it back computer.
The present invention can realize solid is measured the one-point measurement of each point of sample surfaces, how to study better in conjunction with sound field characteristic by the data of its measurement, measures the characteristics of measuring the ultrasonic signal that sample surfaces propagates at solid.
Description of drawings
Fig. 1 is system architecture diagram of the present invention.
Embodiment
Content of the present invention is easier to be expressly understood in order to make, below according to concrete case study on implementation and by reference to the accompanying drawings, the present invention is further detailed explanation.
As shown in Figure 1, a kind of for the d scanning system of measuring sound field, it is characterized in that this system comprises:
Be used for transmitting and receiving hyperacoustic ultrasonic transducer, wherein transmitting transducer adopts the strip piezoelectric ceramic piece that width is narrow, length is long, is attached to the middle of workpiece usually, makes hyperacoustic emissive source approximate ideal line source.Can make sound wave as best one can little at board under test reflected signal up and down like this, to reach the purpose of utilizing the two-dimensional measurement method to replace three-dimensional measurement.During measurement, piezoelectric ceramic piece can be sticked on the measured workpiece surface;
The ultrasonic transducer driver module drives ultrasonic transducer in order to enough power to be provided;
The stepper motor displacement module moves at transverse axis or the longitudinal axis by stepper motor driver control step motor, make transducer probe can mobile collection the ultrasonic sound field in a certain territory, surface, obtain the acoustic field signal data of this point;
Signal acquisition module is crossed signal conditioning circuit the signal that collects is amplified, and carries out the AD conversion again, transfers to microcontroller and handles;
The microprocessor controls processing module, the movement by programming to control the stepper motor that has ultrasound transducer probe and the data that collect are handled;
Communication module, the data after will handling by serial communication send back computer.
As shown in Figure 1, the signals collecting signaling module is made up of signal conditioning circuit and two parts of high-speed AD module; The stepper motor displacement module comprises X-axis stepper motor and y-axis stepper motor; Ultrasonic transducer drives with the ultrasonic transducer driver module; Communication module communicates in the RS232 mode.
Principle of work of the present invention is as follows:
Utilize the ultrasound emission transducer at a certain breakpoint of board under test emission ultrasonic signal, have the ultrasonic sound field in a certain territory, mobile collection surface of the stepper motor of ultrasonic receiving transducer probe by mcu programming control, obtain the acoustic field signal data of this point.Again signal is carried out computing and amplify also numeral output.Finally in conjunction with serial communication, the data that measure are sent it back computer.On computers the data that collect are propagated image by the two dimension that software becomes sound wave at last, and generate dynamic sound wave propagation animation on the basis of two dimensional image.
Single-chip microcomputer adopts the AVR single-chip microcomputer of low-power consumption, like this can be more stable, and the working time is longer.In the collection of data, because the signal of gathering is smaller, by discharge circuit the signal that collects is amplified, carry out the AD conversion again, transmit back single-chip microcomputer and handle.
The present invention can realize solid is measured the one-point measurement of each point of sample surfaces, how to study better in conjunction with sound field characteristic by the data of its measurement, measures the characteristics of measuring the ultrasonic signal that sample surfaces propagates at solid.
Above-described embodiment does not limit the present invention in any form, and all employings are equal to replaces or technical scheme that the mode of equivalent transformation obtains, all drops in protection scope of the present invention.
Claims (8)
1. d scanning system of be used for measuring sound field, it is characterized in that: comprise ultrasonic transducer, the ultrasonic transducer driver module, the stepper motor displacement module, signal acquisition module, micro controller module, communication module, described signal acquisition module is amplified the signal that collects by signal conditioning circuit, carry out the AD conversion again, transfer to micro controller module and handle, described stepper motor displacement module moves at transverse axis or the longitudinal axis by stepper motor driver control step motor, described micro controller module control step motor driver and the signal that collects handled, the data after described communication module will be handled send out.
2. according to claim 1 a kind of for the d scanning system of measuring sound field, it is characterized in that: described signal acquisition module comprises signal conditioning circuit and high-speed AD module.
3. according to claim 1 a kind of for the d scanning system of measuring sound field, it is characterized in that: described stepper motor displacement module comprises X-axis stepper motor, y-axis stepper motor and stepper motor driver.
4. according to claim 1 a kind of it is characterized in that: described ultrasonic transducer comprises transmitting transducer and receiving transducer for the d scanning system of measuring sound field, and adopts the ultrasonic transducer driver module to drive.
5. according to claim 1 a kind of it is characterized in that: described communication module communicates in the RS232 mode by serial ports for the d scanning system of measuring sound field, and the data after handling are sent back computer.
6. according to claim 4 a kind of for the d scanning system of measuring sound field, it is characterized in that: described transmitting transducer is the strip piezoelectric ceramic piece, is attached to the middle of workpiece, makes hyperacoustic emissive source be similar to a desirable line source.
7. according to claim 6 a kind of for the d scanning system of measuring sound field, it is characterized in that: the width of described strip piezoelectric ceramic piece and length ratio are controlled at 1:4 between the 1:6.
8. according to claim 4 a kind of for the d scanning system of measuring sound field, it is characterized in that: the direct contact measurement sample of described receiving transducer solid surface, obtain acoustic field signal.
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| CN2013101898135A CN103278562A (en) | 2013-05-21 | 2013-05-21 | Two-dimensional scanning system for measuring sound fields |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969330A (en) * | 2014-04-28 | 2014-08-06 | 河海大学常州校区 | Ultrasonic flaw detection device for internal defect of pipeline |
| CN103969652A (en) * | 2014-05-19 | 2014-08-06 | 么彬 | Three-dimensional scanning acoustic imaging device |
| CN105157810A (en) * | 2015-05-12 | 2015-12-16 | 南阳理工学院 | Fully automatic sound velocity measuring instrument and measurement method |
| CN105424173A (en) * | 2015-12-25 | 2016-03-23 | 河海大学常州校区 | Underwater space sound field measurement and visualization system and modeling and cleaning method thereof |
| CN110986886A (en) * | 2019-12-18 | 2020-04-10 | 中国科学院长春光学精密机械与物理研究所 | Double-camera dynamic rotation scanning three-dimensional imaging simulation device |
| CN111665296A (en) * | 2019-03-05 | 2020-09-15 | 中国特种设备检测研究院 | Method and device for measuring three-dimensional radiation sound field of ultrasonic transducer based on EMAT |
| CN112067112A (en) * | 2020-09-21 | 2020-12-11 | 中国石油大学(华东) | Automatic underwater ultrasonic cavitation field characteristic measurement and visualization system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969330A (en) * | 2014-04-28 | 2014-08-06 | 河海大学常州校区 | Ultrasonic flaw detection device for internal defect of pipeline |
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| CN105424173A (en) * | 2015-12-25 | 2016-03-23 | 河海大学常州校区 | Underwater space sound field measurement and visualization system and modeling and cleaning method thereof |
| CN111665296A (en) * | 2019-03-05 | 2020-09-15 | 中国特种设备检测研究院 | Method and device for measuring three-dimensional radiation sound field of ultrasonic transducer based on EMAT |
| CN111665296B (en) * | 2019-03-05 | 2024-05-17 | 中国特种设备检测研究院 | Method and device for measuring three-dimensional radiation sound field of ultrasonic transducer based on EMAT |
| CN110986886A (en) * | 2019-12-18 | 2020-04-10 | 中国科学院长春光学精密机械与物理研究所 | Double-camera dynamic rotation scanning three-dimensional imaging simulation device |
| CN112067112A (en) * | 2020-09-21 | 2020-12-11 | 中国石油大学(华东) | Automatic underwater ultrasonic cavitation field characteristic measurement and visualization system and method |
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Application publication date: 20130904 |