CN102253125A - Automatic adjustment device for position and attitude of ultrasonic detection transducer - Google Patents
Automatic adjustment device for position and attitude of ultrasonic detection transducer Download PDFInfo
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- CN102253125A CN102253125A CN2011101122572A CN201110112257A CN102253125A CN 102253125 A CN102253125 A CN 102253125A CN 2011101122572 A CN2011101122572 A CN 2011101122572A CN 201110112257 A CN201110112257 A CN 201110112257A CN 102253125 A CN102253125 A CN 102253125A
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Abstract
The invention provides an automatic adjustment device for a position and an attitude of an ultrasonic detection transducer in an ultrasound scanning detection process. A numerical control following device with two rotating shafts is additionally arranged at a terminal of an ultrasonic scanning mechanism; an ultrasonic transducer is fixed on the numerical control following device; and the swinging of the transducer in two vertical directions is realized by two rotating mechanisms. Because moving parts have relatively small rotational inertia, the rotation and swinging of the transducer can be directly driven by a stepping motor, and the position of corner can be read by a precision optical encoder. The position and the attitude of the transducer are controlled in real time in the detection process according to workpiece surface information; therefore, the axis of the transducer and the normal line of the member appearance are ensured to be consistent in direction, and a relatively strong echo signal and relatively high detection accuracy can be obtained during the detection.
Description
One, technical field
The present invention is to provide a kind of in water jet ultrasonic scan testing process transducer position attitude automatic regulating apparatus.Control transducer pose in the scanning testing process guarantees that the axis of transducer is consistent with the normal direction of member shape exterior feature, the stronger echoed signal of acquisition and than high measurement accuracy when detecting.
Two, technical background
Circular arc camber is comparatively common in machining and manufacturing, is curved body as the pressure pan housing, easily produces defective and stress concentration phenomenon in these curved surface position process, and is most important to the detection of this class defective.Water jet ultrasonic scan detects can be detected as picture to this type of defective, for improving detection sensitivity, gets rid of the influence of curved surface to incident sound beam steering angle, and the acoustic beam incident direction is overlapped with the surface normal at place, measured point.Because the surface normal direction of curve surface work pieces changes with change in location, therefore, need when detecting, adjust the ultrasonic transducer acoustic beam in real time, the position and attitude that just needs transducer changes curvature of curved surface and carries out that real-time shape is wide follows the tracks of.
Three, summary of the invention
Install the numerical control following device of two turning axles additional in the terminal of common ultrasonic scan mechanism, ultrasonic transducer is fixed on this device.Driving transducer by two stepper motors realizes swinging on two vertical direction.Because the moment of inertia of moving component is less, can directly be driven by stepper motor, angle position can be read by the precision optics scrambler.
In the scanning process, when ultrasonic transducer arrives a certain surface location, this device is according to the measured workpiece surface wide type information (being the curvature information of component surface position) of storing in the computing machine, and the posture information of this position fed back to the numerical control adjusting gear by kinetic control system, computing machine is controlled the pose of ultrasonic transducer in view of the above and is realized member is followed the tracks of detection, the axis that can guarantee transducer is consistent with the normal direction of member shape exterior feature, and this adjusting gear speed is very fast and cheap.
Four, description of drawings
Fig. 1 is a ultrasonic transducers locations attitude automatic regulating apparatus;
Fig. 2 is a ultrasonic transducers locations attitude self-regulating process in the scanning;
Fig. 3 is measured workpiece wide type information in surface and a transducer pose adjustment relation in the scanning;
Fig. 4 is a ultrasonic transducers locations attitude automatic regulating apparatus control system principle;
Five, embodiment
For a more detailed description to the present invention for example below in conjunction with accompanying drawing:
In conjunction with Fig. 1, be depicted as the ultrasonic transducers locations attitude automatic regulating apparatus physical construction among the present invention, comprise A axis drive motor 1, B axle runing rest 2, water jet ultrasonic transducer 3, sliding guide 4, B axis drive motor 5, B spindle motor holder 6 and A axle runing rest 7 are formed.A spindle motor 1 and B spindle motor 5 are installed in respectively on A axle runing rest 7 and the B axle runing rest 2, A axle runing rest 7 links to each other with B axle runing rest 2, B axle runing rest 2 is installed in the end of guide rod 4, can move up and down with guide rod 4, and guide rod 4 is fixed on the terminal mobile platform of scanning system.In order to guarantee the water resistance of system, the ultrasonic transducer reflection end face of band nozzle places the below of A, B spindle motor, the top on measured workpiece surface, and the lead by sealing and shielding connects between each circuit interface, guarantees the reliable transmission of signal.。
In conjunction with Fig. 2, in ultrasonic transducers locations attitude self-regulating process, need to guarantee that the axis of transducer is consistent with the normal direction of tested member shape exterior feature during scanning.The position of each measurement point can be with two-dimensional coordinate value quantificational expression on the measured workpiece surface, the distance of horizontal ordinate x (i) i measurement point of expression relative measurement starting point on X direction, ordinate y (i)=dsin (θ of i measurement point
i), θ wherein
iBe the variate-value of transducer axis direction, d is a underwater sound distance.。
In conjunction with Fig. 3, if the cad model of existing measured workpiece, can in detection, directly read the cad file of measured workpiece, generate scanning operation (the scanning operation also can manually be adjusted) automatically, control transducer pose adjustment process in view of the above according to the cad model of workpiece by the industrial computer control program; If there is not the cad model of measured workpiece, need obtain the skeleton pattern of reconstruction by measuring the profile key point.Adopt the principle identical, utilize tutorial program, obtain some key points on the workpiece shape exterior feature, rebuild skeleton pattern and carry out planning parameters of scanning paths with handwriting pad.Choosing with the curved transition of shape profile relation of measurement point is very big, and curved transition hour can be selected bigger measurement spacing, will dwindle the measurement point spacing when curved transition is big.In ultrasonic automatic measurement, the underwater sound causes the collision between ultrasonic transducer, anchor clamps and the workpiece for measurement easily apart from choosing when too small.For guaranteeing the safety of measuring process, generally allow the safety zone of ultrasonic transducer above workpiece move, rely on the underwater sound apart from asking for the positional information of measured point.
In conjunction with Fig. 4, the kinetic control system of adjusting gear adopts the master-slave type multiaxial motion controlling schemes of the two CPU of upper and lower computer of " PC+ motion control card+driver element ".This mode development difficulty is little, convenient and practical, cost is lower.The automatic regulating apparatus control system is made up of motion control card, motor driver, stepper motor and position coder.At first read the wide type information of surface of the work by industrial computer, generate the scanning operation, motion command is passed to motion control card by pci bus, motion control card is by the stepper motor motion of driver drives all directions then, position coder is given motion control card with the actual motion position feedback, judge whether to carry out position compensation by motion control card again, have enough position control accuracy and enough fast response speed to guarantee system.
Claims (5)
1. transducer position attitude automatic regulating apparatus in water jet ultrasonic scan testing process.It is characterized in that: control transducer pose in the scanning testing process, in real time the ultrasonic transducer acoustic beam is adjusted, guarantee that the axis of transducer is consistent with the normal direction of member shape exterior feature, the stronger echoed signal of acquisition and when detecting than high measurement accuracy.
2. method according to claim 1 is characterized in that, ultrasonic transducers locations attitude automatic regulating apparatus comprises that the wide type of physical construction, kinetic control system and workpiece position obtains program.
3. method according to claim 2 is characterized in that: comprise A axis drive motor 1, and B axle runing rest 2, water jet ultrasonic transducer 3, sliding guide 4, B axis drive motor 5, B spindle motor holder 6 and A axle runing rest 7 are formed.
4. method according to claim 2 is characterized in that: the kinetic control system of adjusting gear adopts the master-slave type multiaxial motion controlling schemes of the two CPU of upper and lower computer of " PC+ motion control card+driver element ".
5. method according to claim 2 is characterized in that: the wide type information obtain manner of measured workpiece: if the cad model of existing measured workpiece can generate the scanning operation automatically according to the cad model of workpiece; If there is not the cad model of measured workpiece, can obtain the skeleton pattern of reconstruction by measuring the profile key point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101122572A CN102253125A (en) | 2011-05-03 | 2011-05-03 | Automatic adjustment device for position and attitude of ultrasonic detection transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101122572A CN102253125A (en) | 2011-05-03 | 2011-05-03 | Automatic adjustment device for position and attitude of ultrasonic detection transducer |
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| CN102253125A true CN102253125A (en) | 2011-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011101122572A Pending CN102253125A (en) | 2011-05-03 | 2011-05-03 | Automatic adjustment device for position and attitude of ultrasonic detection transducer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018326A (en) * | 2012-11-29 | 2013-04-03 | 北京理工大学 | Contact type ultrasonic non-destructive testing straight-line automatic scanning device |
| CN106767504A (en) * | 2016-12-09 | 2017-05-31 | 芜湖哈特机器人产业技术研究院有限公司 | Moulding pipe automatic detection device and its detection method |
| CN106990171A (en) * | 2017-05-19 | 2017-07-28 | 中国兵器科学研究院宁波分院 | A kind of ultrasonic wave automatic testing method for considering clamping workpiece error correction |
| CN108318581A (en) * | 2017-12-08 | 2018-07-24 | 中国兵器科学研究院宁波分院 | A kind of arc surface workpiece ultrasonic C-scanning automatic testing method without Set and Positioning |
| CN109164172A (en) * | 2018-09-29 | 2019-01-08 | 广西路桥工程集团有限公司 | A kind of concrete filled steel tube ultrasound examination bracket |
| CN114113339A (en) * | 2021-11-30 | 2022-03-01 | 汕头市超声检测科技有限公司 | Method for detecting scanning frame by using motor to stably drive |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018326A (en) * | 2012-11-29 | 2013-04-03 | 北京理工大学 | Contact type ultrasonic non-destructive testing straight-line automatic scanning device |
| CN106767504A (en) * | 2016-12-09 | 2017-05-31 | 芜湖哈特机器人产业技术研究院有限公司 | Moulding pipe automatic detection device and its detection method |
| CN106990171A (en) * | 2017-05-19 | 2017-07-28 | 中国兵器科学研究院宁波分院 | A kind of ultrasonic wave automatic testing method for considering clamping workpiece error correction |
| CN106990171B (en) * | 2017-05-19 | 2019-11-29 | 中国兵器科学研究院宁波分院 | A kind of ultrasonic wave automatic testing method considering clamping workpiece error correction |
| CN108318581A (en) * | 2017-12-08 | 2018-07-24 | 中国兵器科学研究院宁波分院 | A kind of arc surface workpiece ultrasonic C-scanning automatic testing method without Set and Positioning |
| CN109164172A (en) * | 2018-09-29 | 2019-01-08 | 广西路桥工程集团有限公司 | A kind of concrete filled steel tube ultrasound examination bracket |
| CN114113339A (en) * | 2021-11-30 | 2022-03-01 | 汕头市超声检测科技有限公司 | Method for detecting scanning frame by using motor to stably drive |
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Application publication date: 20111123 |