CN101398328B - Automatic measurement mechanism for ultrasonic liquid-dipping transducer acoustic field - Google Patents

Automatic measurement mechanism for ultrasonic liquid-dipping transducer acoustic field Download PDF

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Publication number
CN101398328B
CN101398328B CN2008101719736A CN200810171973A CN101398328B CN 101398328 B CN101398328 B CN 101398328B CN 2008101719736 A CN2008101719736 A CN 2008101719736A CN 200810171973 A CN200810171973 A CN 200810171973A CN 101398328 B CN101398328 B CN 101398328B
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fixed
dimensional scanning
scanning frame
ultrasonic
frame
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CN101398328A (en
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徐春广
肖定国
徐圆飞
周世圆
郝娟
贾玉平
龚裕
武婧
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Beijing Institute of Technology BIT
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Beijing Institute of Technology BIT
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Abstract

The invention provides an ultrasonic liquid immersion transducer sound field automatic measurement device which is especially suitable for the measurement of ultrasonic water immersion transducer. The sound field measurement device is composed of a three-dimensional scanning frame, a sound absorption water trough, a reflection device, an ultrasonic transducer frame, a data processor, a three-dimensional motion controller and a stepping motor; the sound absorption water trough is arranged in the three-dimensional scanning frame; the three-dimension motion part of the three-dimensional scanning frame is arranged above the sound absorption water trough; the reflection device is arranged on the bottom surface of the sound absorption water trough and below the three-dimensional motion part of the three-dimensional scanning frame; the ultrasonic transducer frame is fixed on the three-dimensional scanning frame by a thread; the data processor is connected with the ultrasonic energy transducer to be tested by a signal wire; the three-dimensional motion controller is connected with the stepping motor by the signal wire and a power line; and the stepping motor is fixed on the three-dimensional scanning frame by the thread. The device has convenient operation, high automation degree, simple structure and low cost.

Description

Automatic measurement mechanism for ultrasonic liquid-dipping transducer acoustic field
Technical field:
The present invention relates to a kind of automatic measurement mechanism of ultrasonic liquid-dipping transducer acoustic field, relate in particular to a kind of automatic measurement mechanism of ultrasonic water immersion transducer acoustic field.
Background technology:
Ultrasonic transducer has a wide range of applications in Ultrasonic Detection and measuring system.Ultrasonic Detection and measuring technique are to utilize the sound field and the matter interaction of ultrasonic transducer generating, thereby produce various physical influences, the effect of ultrasonication is closely related with ultrasonic sound field, is vital so grasp the information of transducer acoustic field distribution for Ultrasonic Detection and measurement.
The Chinese invention patent publication number is CN1461942A, a kind of sound field measuring device is disclosed in the application for a patent for invention that open day is on Dec 17th, 2003, this device adopts manual spot measurement method to carry out acoustic field, and this device is unfavorable for that operation, error are big and efficient is lower; In addition, this application adopts the acoustic pressure of nautical receiving set measurement transducer sound field to distribute, but nautical receiving set costs an arm and a leg, and complicated operation is not suitable for applying on a large scale.
Summary of the invention:
At the problems referred to above that exist in the above-mentioned background technology, the object of the present invention is to provide a kind of easy to operate, the automaticity height, simple in structure, lower-cost sound field measuring device is realized the measurement to ultrasonic liquid-dipping transducer acoustic field.
Ultrasonic liquid-dipping transducer acoustic field measurement mechanism of the present invention comprises: three-dimensional scanning frame, sound absorbing water tank, reflection unit, ultrasonic transducer frame, data processor, three-dimensional motion controller, stepper motor.Sound absorbing water tank is positioned at the inside of three-dimensional scanning frame; The three-dimensional motion part of three-dimensional scanning frame is above sound absorbing water tank; Reflection unit is positioned on the sound absorbing water tank bottom surface, is in the below of the three-dimensional motion part of three-dimensional scanning frame; Ultrasonic transducer frame is fixed on the three-dimensional scanning frame by screw thread; Be connected with signal wire between data processor and the tested ultrasonic transducer; Be connected with power lead with signal wire between three-dimensional motion controller and the stepper motor; Stepper motor is fixed on the three-dimensional scanning frame by screw thread.
Described three-dimensional scanning frame has four support bars, two directions X guide rails, a Y traversing guide, a Z traversing guide.Four support bars can be realized the adjustment of four support bar height by four the ditch nuts that are threaded.Two directions X guide rails are fixed on four support bars by screw thread, and are 90 degree angles with connected support bar.The Y traversing guide is fixed on by screw thread on the slide block of directions X guide rail, and the Z traversing guide is fixed on the slide block of Y traversing guide by screw thread.
The inside surface sticking sound-absorbing material of described sound absorbing water tank, and have the super large measurement range, reach 1300 millimeters of directions Xs, 700 millimeters in Y direction, 800 millimeters in Z direction.
Described ultrasonic transducer frame comprises the signal catheter and the signal catheter fixed mechanism of ultrasonic transducer, and the signal catheter fixed mechanism is fixed on by screw thread on the slide block of Z traversing guide, and signal catheter is fixed on the fixed mechanism by two jackscrews.One termination of signal catheter has ultrasonic transducer, and the other end is connected to data processor and ultrasonic signal excites receiving circuit.
Described reflection unit is made up of inclined-plane base, support and small ball.The upper surface of inclined-plane base and lower surface are 30 degree and tilt, and the upper surface of inclined-plane base is smooth, though be to adopt 30 degree to tilt in the present embodiment, by practical application, find to spend in 70 scopes of spending 10 and all are fine; On this inclined-plane base, be drilled with a through hole, be used for placing rack, and support is fixed in the through hole by jackscrew; Small ball can be fixed by the mode and the support of welding or interference fit, and the surface of small ball is through polishing.
Description of drawings:
Fig. 1 is the one-piece construction synoptic diagram of ultrasonic liquid-dipping transducer acoustic field measurement mechanism of the present invention;
Fig. 2 is the structural representation of the three-dimensional scanning frame in the ultrasonic liquid-dipping transducer acoustic field measurement mechanism of the present invention;
Fig. 3 is the structural representation of the ultrasonic transducer frame in the ultrasonic liquid-dipping transducer acoustic field measurement mechanism of the present invention; And
Fig. 4 is the structural representation of the reflection unit in the ultrasonic liquid-dipping transducer acoustic field measurement mechanism of the present invention.
Embodiment:
As shown in Figure 1, ultrasonic liquid-dipping transducer acoustic field measurement mechanism of the present invention is made of three-dimensional scanning frame 1, sound absorbing water tank 2, reflection unit 3, ultrasonic transducer frame 4, data processor 5, three-dimensional motion controller 6, stepper motor 7.Sound absorbing water tank 2 is positioned at the inside of three-dimensional scanning frame 1, and the three-dimensional motion part of three-dimensional scanning frame 1 is above sound absorbing water tank 2; Reflection unit 3 is arranged in sound absorbing water tank 2, and is positioned on the sound absorbing water tank bottom surface, is in the below of the three-dimensional motion part of three-dimensional scanning frame; Ultrasonic transducer frame 4 is fixed on the three-dimensional scanning frame 1 by screw thread; Be connected with signal wire between data processor 5 and the tested ultrasonic transducer; Be connected with power lead with signal wire between three-dimensional motion controller 6 and the stepper motor 7; Stepper motor 7 is fixed on the three-dimensional scanning frame 1 by screw thread.
As shown in Figure 2, four of three-dimensional scanning frame 1 support bars 11 are by four the ditch nuts 12 that are threaded.Two directions X guide rails 13 are fixed on four support bars 11 by screw thread, and are 90 degree angles with connected support bar 11.Y traversing guide 15 is fixed on the slide block 14 of directions X guide rail 13 by screw thread, Z traversing guide 17 is fixed on by screw thread on the slide block 16 of Y traversing guide 15, and three stepper motors 7 are connected with a guide rail, Y traversing guide 15, Z traversing guide 17 in the directions X guide rail 13 respectively by screw thread.Adopted the ultrasonic liquid-dipping transducer automatic measurement mechanism of described stepper motor easy to operate, the automaticity height.Though what adopt in the present embodiment is stepper motor, also can adopt servomotor.
As shown in Figure 3, ultrasonic transducer frame 4 is made up of signal catheter 41 and signal catheter fixed mechanism 42, signal catheter fixed mechanism 42 is fixed on by screw thread on the slide block 18 of Z traversing guide 17, and signal catheter 41 is fixed on the signal catheter fixed mechanism 42 by two jackscrews.One termination of signal catheter 41 has tested ultrasonic transducer, and the other end is connected to data processor 5 and ultrasonic signal excites receiving circuit 8.
As shown in Figure 4, reflection unit 3 is made up of inclined-plane base 31, support 32 and small ball 33.The upper surface 35 and the lower surface 36 of inclined-plane base 31 is 30 degree and tilts, the upper surface 35 of inclined-plane base 31 is smooth and has size greater than tested ultrasonic transducer size, though be to adopt 30 degree to tilt in the present embodiment, but by practical application, discovery is spent in the scopes of 70 degree 10 and all is fine.Be drilled with a through hole 34 at the center of inclined-plane base 31, support 32 place with through hole 34 in, and be fixed with jackscrew.Can fix by the mode of welding or interference fit between support 32 and the small ball 33, and small ball 33 is through polishing.The diameter of small ball and is selected the suitably small ball of size according to the diameter of ultrasonic transducer between 1 millimeter to 5 millimeters.Adopt the automatic measurement mechanism for ultrasonic liquid-dipping transducer acoustic field of the present invention of described reflection unit easy to operate, simple in structure, cost is lower.
The acoustic field process is as follows, tested ultrasonic transducer is connected to the lower end of signal catheter 41, with reflection unit 3 be positioned over tested transducer under, small ball 33 faces the ultrasonic emitting face of tested ultrasonic transducer, the pulse ultrasonic wave of tested ultrasonic transducer generating runs into small ball 33 in communication process after, reflected back by small ball 33 and received by tested ultrasonic transducer, tested ultrasonic transducer also passes the signal in the data processor 5, pass through the processing of data processor 5 and obtain sound pressure level, and this sound pressure level is used as the sound pressure level at place, small ball 33 summits in the ultrasonic transducer sound field, when reflection unit 3 is static, by 7 motions of three-dimensional motion controller 6 control step motors, stepper motor 7 drives X, Y and Z traversing guide 13,15 and 17 motions, carry out the space three-dimensional motion thereby drive ultrasonic transducer with respect to small ball 33, the sound pressure level that then just can record the three-dimensional sound field of ultrasonic transducer like this distributes.
The ultrasound wave that is reflected by small ball 33 can not continue to propagate into forward on the upper surface 35 of inclined-plane base 31, because being 30 degree, the upper surface 35 and the lower surface 36 of inclined-plane base 31 tilt, this part ultrasound wave can be reflected away to be 60 degree angles with incident direction, make ultrasonic transducer not receive this part ultrasound wave.Like this, just can not influence the measurement result of ultrasonic transducer sound field.

Claims (3)

1. automatic measurement mechanism for ultrasonic liquid-dipping transducer acoustic field, it is characterized in that: be made of three-dimensional scanning frame, sound absorbing water tank, reflection unit, ultrasonic transducer frame, data processor, three-dimensional motion controller, stepper motor, sound absorbing water tank is positioned at the inside of three-dimensional scanning frame; The three-dimensional motion part of three-dimensional scanning frame is above sound absorbing water tank; Reflection unit is positioned on the sound absorbing water tank bottom surface, be in the below of the three-dimensional motion part of three-dimensional scanning frame, described reflection unit is by the inclined-plane base, support and small ball are formed, the upper surface and the lower surface of described inclined-plane base are an angle tilt, described angle is spent in the scope of 70 degree 10, and the upper surface of described inclined-plane base is smooth, be drilled with a through hole on the described inclined-plane base, be used for placing rack, and support is fixed in the above-mentioned through hole by jackscrew, described small ball is fixed by the mode and the support of welding or interference fit, and the surface of described small ball is through polishing; Ultrasonic transducer frame is fixed on the three-dimensional scanning frame by screw thread; Be connected with signal wire between data processor and the tested ultrasonic transducer; Be connected with power lead with signal wire between three-dimensional motion controller and the stepper motor; Stepper motor is fixed on the three-dimensional scanning frame by screw thread.
2. device according to claim 1, it is characterized in that: described three-dimensional scanning frame has four support bars, two directions X guide rails, a Y traversing guide, a Z traversing guide, wherein, described four support bars can be realized the adjustment of four support bar height by four the ditch nuts that are threaded; Described two directions X guide rails are fixed on four support bars by screw thread, and are 90 degree angles with connected support bar; Described Y traversing guide is fixed on the slide block of directions X guide rail by screw thread; Described Z traversing guide is fixed on the slide block of Y traversing guide by screw thread.
3. device according to claim 1, it is characterized in that: described ultrasonic transducer frame comprises the signal catheter and the signal catheter fixed mechanism of ultrasonic transducer, described signal catheter fixed mechanism is fixed on the slide block of Z traversing guide by screw thread, described signal catheter is fixed on the described signal catheter fixed mechanism by two jackscrews, one end of described signal catheter is connected with tested ultrasonic transducer, and the other end is connected with data processor and ultrasonic signal excites receiving circuit.
CN2008101719736A 2008-10-28 2008-10-28 Automatic measurement mechanism for ultrasonic liquid-dipping transducer acoustic field Active CN101398328B (en)

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Families Citing this family (7)

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Publication number Priority date Publication date Assignee Title
CN102560765A (en) * 2009-11-04 2012-07-11 铜陵市松宝机械有限公司 Three-dimensional robot for yarn pulling
CN102279044A (en) * 2011-05-03 2011-12-14 北京理工大学 Method for automatically collimating hydrophone in ultrasonic sound filed measurement
CN102279045A (en) * 2011-05-03 2011-12-14 北京理工大学 Device for measuring characteristics of sound field of air-coupled ultrasonic detection transducer
CN104323798B (en) * 2014-10-21 2017-02-08 焦瑞宁 Application method of portable movable type medical ultrasonic inspection and measurement device
CN110160623A (en) * 2018-04-24 2019-08-23 北京机电工程研究所 Hanging and measurement combined system
CN108918907A (en) * 2018-05-21 2018-11-30 河海大学 A kind of acoustic Doppler velocimetry automatic sampling apparatus and its method of sampling
CN110726467B (en) * 2019-09-19 2021-10-15 中航复合材料有限责任公司 Method for testing sound field of ultrasonic transducer

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