CN205430608U - Phased array transducer nonlinearity sound field measuring device - Google Patents
Phased array transducer nonlinearity sound field measuring device Download PDFInfo
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- CN205430608U CN205430608U CN201620169790.0U CN201620169790U CN205430608U CN 205430608 U CN205430608 U CN 205430608U CN 201620169790 U CN201620169790 U CN 201620169790U CN 205430608 U CN205430608 U CN 205430608U
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- array transducer
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- phased array
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Abstract
The utility model discloses a phased array transducer nonlinearity sound field measuring device. Present sound field is measured and is not considered the influence of hydrophone directive property to receiving data. The utility model discloses a phased array transducer is fixed in the three -jaw chuck structure, the computer passes through PLC controller control hydrophone actuating mechanism, FPGA data acquisition system's pulse signal passes through to encourage the phased array transducer to radiate the sound wave to the aquatic after power amplifier amplifies, and FPGA data acquisition system controls the delayed time processing to each wafer array element of phased array transducer mutually, makes phased array radiation sound wave deflect and focuses on with a bit, hydrophone actuating mechanism drives the hydrophone and scans, the hydrophone converts received acoustic signals to the signal of telecommunication and transferes FPGA data acquisition system, and FPGA data acquisition system transferes the computer through serial port communication with the signal of telecommunication and carries out analysis processes. The utility model discloses an accurate angular adjustment measures the non -linear sound field of phased array.
Description
Technical field
This utility model belongs to field of acoustics, is specifically related to a kind of phase array transducer nonlinear field measurement apparatus.
Background technology
Utilize and ultrasonic carry out one of Clinics and Practices important branch becoming bioengineering.When conventional ultrasound bundle focuses on, its focus is all fixing, and often need to adjust focus in ultrasonic therapeutic, now the tissue of diverse location and the degree of depth can only could be scanned treatment by mechanical scanning, mobile array, but machinery adjusts very inconvenient and speed is relatively slow, limits its application.The most just proposing phased array method, it is with electronics technological adjustment focal position and the direction of focusing, it is achieved dynamically deflection focusing.Ultrasonic phased array technology is gradually developed into industrial nondestructive testing by initial medical field, and the research to ultrasonic phase array at present is concentrated mainly on exploitation and the optimization of novel phased array probe, and it has become a study hotspot in recent years.
Ultrasonic phased array transducer refers to be formed array by multiple independent piezoelectric chips, controls to excite each wafer cell by certain rule and sequential electronic control system, regulates position and the direction of focusing controlling focus；Conventional ultrasonic phase array detection technique is ultrasonic based on conventional linear, when phased array system is many array element, altofrequency and high intensity, focuses on and ultrasonic propagates in medium, common medium nonperfect fluid, but has stickiness, heat conductivity and nonlinear.Under high intensity focused ultrasound, owing to acoustic pressure and the frequency ratio of sound wave are bigger, when medium is propagated, acoustic pressure and the vibration velocity of particle are not the least or negligible for atmospheric pressure and the velocity of sound, now must take into the nonlinear effect of propagation medium, acoustic wave energy is turned to higher radio-frequency component by it, and waveform shows as distortion.The accurately control of phased array sound field can be brought impact by the error that nonlinear effect is brought, and therefore the research to phased array nonlinear field characteristic has great significance.
nullWhen carrying out the acoustic field of phase array transducer，Because hydrophone has reception directivity，Hydrophone and the angle of ultrasonic transducer introduce certain error can to the test of sound field，Therefore for ensureing to measure the accuracy of phased array nonlinear field，It is crucial that the signal that fibre optic hydrophone receives is the most effective signal，Now must assure that hydrophone work surface is parallel position with the focused beam that need to measure，Traditional acoustic field is by controlling hydrophone relative to phase array transducer motion，Measure the space acoustic pressure distribution of the ultrasonic propagation that phase array transducer is launched，The hydrophone directivity impact on receiving data is not considered during measurement，Add ul-trasonic irradiation and can produce a large amount of minute bubbles when liquid，When the acoustic power strong collapse of bigger cavitation bubble is easily generated cavitation phenomenon, fibre optic hydrophone is caused damage，Directly result in the inaccurate of measurement result.
Summary of the invention
The purpose of this utility model is for the problems referred to above, propose a kind of phase array transducer nonlinear field measurement apparatus the nonlinear field of phased array is measured, devise angle when focused beam is measured by the structures such as hydrophone fixture to be finely adjusted, control five motor movements by PLC and realize the scanning motion of hydrophone, FPGA data acquisition system realizes impulse ejection simultaneously, the phased time delay of multichannel, data acquisition function, the last preservation and the data in later stage realized on computers gathering data processes, the functions such as sound-filed simulation display harmony parameter calculating, the detection to phase array transducer nonlinear field is realized with complete.
This utility model includes dissolved oxygen degasser, phase array transducer, hydrophone drive mechanism, PLC, computer, FPGA data acquisition system, power amplifier, pond and scroll chuck structure；Described phase array transducer is fixed in scroll chuck structure, and scroll chuck structure is fixed on medial wall, pond；The degassed water processed through dissolved oxygen degasser bubble removing fills pond；Computer is connected with PLC by serial communication port, and PLC is sent movement instruction, and PLC passes through three the first motors of stepper motor driver control hydrophone drive mechanism and two the second motors；The pulse signal of described FPGA data acquisition system is controlled to produce by computer, and after being amplified, encourage phase array transducer radiative acoustic wave in water by power amplifier, and FPGA data acquisition system carries out phased delay process to each wafer array element of phase array transducer, phased array radiative acoustic wave is made to deflect and focus on same point；Computer, according to the depth of focus of phased array radiative acoustic wave and sound wave deflection angle, controls hydrophone drive mechanism and drives hydrophone to be scanned；The acoustic signals received is converted into the signal of telecommunication and passes to FPGA data acquisition system by hydrophone, and the signal of telecommunication is passed to computer by serial communication and is analyzed processing by FPGA data acquisition system.
Described hydrophone drive mechanism includes screw mandrel group, the first motor, the second motor, shaft coupling, arc lasso, hydrophone fixture and guide rail.Described screw mandrel group is made up of the first horizontal lead screw, the second horizontal lead screw and vertical screw mandrel；Three screw mandrels are axial arranged along three of three-dimensional system of coordinate, and driven respectively by three the first motors；Nut block on a piece guide rail and the first horizontal lead screw is fixed, and constitutes sliding pair with the nut block on the second horizontal lead screw, and the bearing supporting the second horizontal lead screw constitutes sliding pair with another root guide rail being fixed on pond；The gripper shoe of support upright screw mandrel is fixed with the nut block on the second horizontal lead screw；The output shaft of one of them the second motor is connected by shaft coupling with rotating shaft one end, and the rotating shaft other end is fixed with arc lasso；The arc groove that described hydrophone fixture and arc lasso inwall offer constitutes sliding pair, and by another the second step motor drive；Two the second motors are each attached in gripper shoe.
The beneficial effects of the utility model are:
This utility model uses the high accuracy hydrophone drive mechanism of five degree of freedom to drive fibre optic hydrophone to be scanned, and devises fibre optic hydrophone angle adjustment structure, is measured the nonlinear field of phased array by accurate angle adjustment.Overcome tradition to utilize in the round trip of scanning kinematic axis and gather data, the shortcoming not taking into account the hydrophone directivity impact on receiving data simultaneously.This utility model measure sound field more accurately, more direct, it is adaptable to the measurement of various phased array deflection focusing nonlinear fields.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model.
Detailed description of the invention
The utility model is described in further detail below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of phase array transducer nonlinear field measurement apparatus, including dissolved oxygen degasser, phase array transducer, hydrophone drive mechanism, PLC 1, computer 2, FPGA data acquisition system 3, power amplifier 4, pond 5 and scroll chuck structure 6.First with dissolved oxygen degasser light water carried out bubble removing process, then fix phase array transducer in scroll chuck structure 6, make degassed water fill pond 5；Scroll chuck structure 6 is fixed on medial wall, pond.Computer 2 is connected with PLC 1 by serial communication port, PLC 1 is sent movement instruction, PLC 1 controls three the first motors 8 of hydrophone drive mechanism and two the second motors 9 by stepper motor driver, thus drive hydrophone to realize the motion of five degree of freedom, sound field is scanned.The pulse signal of FPGA data acquisition system 3 is controlled to produce by computer 2, and after being amplified, encourage phase array transducer radiative acoustic wave in water by power amplifier 4, and FPGA data acquisition system 3 carries out phased delay process to each wafer array element of phase array transducer, phased array radiative acoustic wave is made to deflect and focus on same point；The pulse signal that the depth of focus (distance of phase array transducer center probe point to focus point) of phased array radiative acoustic wave and sound wave deflection angle are controlled to produce by computer 2 determines, computer, according to the depth of focus of phased array radiative acoustic wave and sound wave deflection angle, controls hydrophone drive mechanism and drives hydrophone to be scanned；The acoustic signals received is converted into the signal of telecommunication and passes to FPGA data acquisition system 3 by hydrophone, and the signal of telecommunication is passed to computer by serial communication and is analyzed processing by FPGA data acquisition system；The analyzing and processing of the signal of telecommunication is specially extracted Resonance Wave Composition by computer, and shows the first-harmonic sound field harmony wave sound field of phase array transducer.
Hydrophone drive mechanism includes screw mandrel group the 7, first motor the 8, second motor 9, shaft coupling 10, arc lasso 11, hydrophone fixture 12 and guide rail 13.Screw mandrel group 7 is made up of the first horizontal lead screw, the second horizontal lead screw and vertical screw mandrel；Three screw mandrels are axial arranged along three of three-dimensional system of coordinate, and driven respectively by three the first motors 8；A piece guide rail 13 is fixed with the nut block on the first horizontal lead screw, and constitutes sliding pair with the nut block on the second horizontal lead screw so that the nut block on the first horizontal lead screw can drive the second horizontal lead screw to move along another root guide rail 13 being fixed on pond 5；The gripper shoe of support upright screw mandrel is fixed with the nut block on the second horizontal lead screw；The output shaft of one of them the second motor 9 is connected by shaft coupling 10 with rotating shaft one end, and the rotating shaft other end is fixed with arc lasso 11；Hydrophone fixture 12 is placed in the arc groove that arc lasso 11 inwall offers, and driven arcuately concave slot sports to realize the fine setting of angle in perpendicular by another second motor 9, overcome, because hydrophone receives directivity, measurement result is brought the impact of error, it is ensured that the accuracy of measurement data；Two the second motors 9 are each attached in gripper shoe.Existence because of phase array transducer alignment error, devise step motor control hydrophone to move along the automatization of five degree of freedom, first motor achieves three-dimensional motion, and the second stepping driven by motor arc lasso 11 realizes the regulation of 360 ° of anglecs of rotation in horizontal plane.
The operation principle of this phase array transducer nonlinear field measurement apparatus:
nullAfter phase array transducer scroll chuck structure is fixed，Computer controls the first motor 8 by PLC and the second motor 9 drives hydrophone to move to the certain altitude in degassed water，The pulse signal that FPGA data acquisition system produces is by encouraging phase array transducer radiative acoustic wave in water after power amplifier，And multiple array elements of phase array transducer are carried out different delay process，Transducer radiative acoustic wave deflection certain angle is made to focus on same point，According to depth of focus harmony beam steering angle，Controlling the first motor again makes hydrophone move to the focal zone of phase array transducer，And realize angle adjustment by the second motor，Hydrophone and focused beam is made to be operated in the same line，The signal that hydrophone receives is acquired by data collecting card and passes to computer，The signal received is carried out the extraction of first-harmonic and harmonic wave by computer，And show the first-harmonic sound field harmony wave sound field pattern of phased array，Contrast with theoretical simulation figure，Analytical error，And analyze the nonlinear effect impact on phase array transducer focusing acoustic field.
Claims (2)
1. a phase array transducer nonlinear field measurement apparatus, including dissolved oxygen degasser, phase array transducer, hydrophone drive mechanism, PLC, computer, FPGA data acquisition system, power amplifier, pond and scroll chuck structure, it is characterized in that: described phase array transducer is fixed in scroll chuck structure, and scroll chuck structure is fixed on medial wall, pond；The degassed water processed through dissolved oxygen degasser bubble removing fills pond；Computer is connected with PLC by serial communication port, and PLC is sent movement instruction, and PLC passes through three the first motors of stepper motor driver control hydrophone drive mechanism and two the second motors；The pulse signal of described FPGA data acquisition system is controlled to produce by computer, and after being amplified, encourage phase array transducer radiative acoustic wave in water by power amplifier, and FPGA data acquisition system carries out phased delay process to each wafer array element of phase array transducer, phased array radiative acoustic wave is made to deflect and focus on same point；Computer, according to the depth of focus of phased array radiative acoustic wave and sound wave deflection angle, controls hydrophone drive mechanism and drives hydrophone to be scanned；The acoustic signals received is converted into the signal of telecommunication and passes to FPGA data acquisition system by hydrophone, and the signal of telecommunication is passed to computer by serial communication by FPGA data acquisition system.
A kind of phase array transducer nonlinear field measurement apparatus the most according to claim 1, it is characterised in that: described hydrophone drive mechanism includes screw mandrel group, the first motor, the second motor, shaft coupling, arc lasso, hydrophone fixture and guide rail；Described screw mandrel group is made up of the first horizontal lead screw, the second horizontal lead screw and vertical screw mandrel；Three screw mandrels are axial arranged along three of three-dimensional system of coordinate, and driven respectively by three the first motors；Nut block on a piece guide rail and the first horizontal lead screw is fixed, and constitutes sliding pair with the nut block on the second horizontal lead screw, and the bearing supporting the second horizontal lead screw constitutes sliding pair with another root guide rail being fixed on pond；The gripper shoe of support upright screw mandrel is fixed with the nut block on the second horizontal lead screw；The output shaft of one of them the second motor is connected by shaft coupling with rotating shaft one end, and the rotating shaft other end is fixed with arc lasso；The arc groove that described hydrophone fixture and arc lasso inwall offer constitutes sliding pair, and by another the second step motor drive；Two the second motors are each attached in gripper shoe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620169790.0U CN205430608U (en) | 2016-03-04 | 2016-03-04 | Phased array transducer nonlinearity sound field measuring device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106382982A (en) * | 2016-11-21 | 2017-02-08 | 中国计量大学 | Portable HIFU acoustic parameter on-site measuring apparatus |
| CN106772327A (en) * | 2016-12-28 | 2017-05-31 | 清华大学苏州汽车研究院（吴江） | A kind of multi-functional ultrasonic sensor directivity test device easy to install |
| CN108414625A (en) * | 2018-05-30 | 2018-08-17 | 广东工业大学 | A kind of acoustic characteristic measuring device and system |
| CN109506771A (en) * | 2018-11-20 | 2019-03-22 | 西北工业大学 | With the sound field detection method and device of spatialization function in high-temp liquid medium |
| CN110008615A (en) * | 2019-04-15 | 2019-07-12 | 中国计量大学 | A kind of HIFU sound field detection system based on finite element model method |
| CN111649208A (en) * | 2020-06-01 | 2020-09-11 | 中国船舶科学研究中心 | Digital acoustic equipment compatibility test platform based on motion control |
| CN112229499A (en) * | 2020-09-15 | 2021-01-15 | 东莞东阳光医疗智能器件研发有限公司 | Sound field measuring system and control method thereof |
| CN113049678A (en) * | 2021-03-22 | 2021-06-29 | 沈阳大学 | Weldment detection device and method based on sound field regulation and control |
| CN113063855A (en) * | 2021-03-22 | 2021-07-02 | 广东工业大学 | Automatic hydrophone acoustic characteristic measurement system and method |
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2016
- 2016-03-04 CN CN201620169790.0U patent/CN205430608U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106382982A (en) * | 2016-11-21 | 2017-02-08 | 中国计量大学 | Portable HIFU acoustic parameter on-site measuring apparatus |
| CN106772327A (en) * | 2016-12-28 | 2017-05-31 | 清华大学苏州汽车研究院（吴江） | A kind of multi-functional ultrasonic sensor directivity test device easy to install |
| CN108414625A (en) * | 2018-05-30 | 2018-08-17 | 广东工业大学 | A kind of acoustic characteristic measuring device and system |
| CN109506771A (en) * | 2018-11-20 | 2019-03-22 | 西北工业大学 | With the sound field detection method and device of spatialization function in high-temp liquid medium |
| CN110008615A (en) * | 2019-04-15 | 2019-07-12 | 中国计量大学 | A kind of HIFU sound field detection system based on finite element model method |
| CN110008615B (en) * | 2019-04-15 | 2024-04-09 | 中国计量大学 | HIFU sound field detection system based on finite element model method |
| CN111649208A (en) * | 2020-06-01 | 2020-09-11 | 中国船舶科学研究中心 | Digital acoustic equipment compatibility test platform based on motion control |
| CN111649208B (en) * | 2020-06-01 | 2021-10-29 | 中国船舶科学研究中心 | Digital acoustic equipment compatibility test platform based on motion control |
| CN112229499A (en) * | 2020-09-15 | 2021-01-15 | 东莞东阳光医疗智能器件研发有限公司 | Sound field measuring system and control method thereof |
| CN112229499B (en) * | 2020-09-15 | 2022-08-12 | 韶关东阳光自动化设备有限公司 | Sound field measuring system and control method thereof |
| CN113049678A (en) * | 2021-03-22 | 2021-06-29 | 沈阳大学 | Weldment detection device and method based on sound field regulation and control |
| CN113063855A (en) * | 2021-03-22 | 2021-07-02 | 广东工业大学 | Automatic hydrophone acoustic characteristic measurement system and method |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160803 Termination date: 20170304 |
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| CF01 | Termination of patent right due to non-payment of annual fee |