CN116106425B - Magnetic nondestructive testing system based on ultrasonic phased array technology - Google Patents
Magnetic nondestructive testing system based on ultrasonic phased array technology Download PDFInfo
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- 238000009659 non-destructive testing Methods 0.000 title claims abstract description 12
- 239000000523 sample Substances 0.000 claims abstract description 26
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- 238000001514 detection method Methods 0.000 claims description 21
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Abstract
The invention provides a magnetic nondestructive testing system based on an ultrasonic phased array technology, which comprises an ultrasonic sensor transmitting part, an ultrasonic sensor receiving part, a control part, a phased array unit and a CAN bus, wherein focused and/or deflected ultrasonic waves are transmitted to a defect position through a transmitting probe, the ultrasonic sensor receiving part receives reflected echo signals through a corresponding receiving probe and conveys the echo signals to a data acquisition unit through the phased array unit, and the data acquisition unit synthesizes and identifies the echo signals.
Description
Technical Field
The invention belongs to the technical field of ultrasonic nondestructive inspection, and particularly relates to a magnetic nondestructive inspection system based on an ultrasonic phased array technology.
Background
The ultrasonic flaw detector is a portable industrial nondestructive flaw detector, and can rapidly, conveniently, nondestructively and accurately detect, position, evaluate and diagnose various defects in a workpiece; the method can be used for laboratories and engineering sites, and can be widely applied to industries such as boilers, pressure vessels, aerospace, aviation, electric power, petroleum, chemical industry and the like. The conventional common ultrasonic flaw detector has the problems that the structure is simple and the structure is fixed, and in the use process, if the ultrasonic flaw detector needs to test in multiple directions, the purpose of testing simultaneously is difficult to meet. The ultrasonic phased array technology is not effectively utilized in the flaw detection field, no matter a straight probe or an inclined probe is adopted, a reflecting surface is required to return along the original sound wave direction to detect a target, the existing phased array ultrasonic flaw detection device carries out ultrasonic nondestructive flaw detection on a press-fit part by arranging the probe position, the mode is the same as the action of a common ultrasonic flaw detector, the advantage of a phased array cannot be fully exerted, and the ultrasonic nondestructive flaw detection on other parts of the surface in the detection process cannot be realized; moreover, the probe position cannot be accurately positioned, so that the coupling degree of the wedge block and the surface to be detected is influenced, the detection rate of ultrasonic nondestructive flaw detection is further influenced, and the defects of poor detection capability, high false alarm rate and the like exist.
In the existing automatic detection system for the internal quality of the butt welding seam with the backing plate based on the phased array ultrasonic technology, the internal quality flaw detection of the phased array welding seam based on the teaching track of the probe is performed, and the accuracy of the distance from the phased array probe to the center of the welding seam in the scanning process of the phased array probe along the welding seam is uncontrollable due to the welding deformation of the workpiece, the installation error of the workpiece to be detected and the systematic error of a quality inspection flaw detection executing mechanism. The phased array technology is suitable for processing and detecting a damaged target which is simpler when the flaw detection is carried out in a product, has higher technical support requirement due to the problem of complex signal when the internal structure of a product material is complex, and can not detect targets in all directions at one time.
Disclosure of Invention
The invention provides a magnetic nondestructive testing system based on an ultrasonic phased array technology, which is used for realizing nondestructive testing of multiple array elements by establishing a linear array unit and a convex array or concave array phased array unit with direction regularly changed.
The invention solves the technical problems by adopting the scheme that: the magnetic nondestructive testing system based on the ultrasonic phased array technology comprises an ultrasonic sensor transmitting part, an ultrasonic sensor receiving part, a control part, a phased array unit and a CAN bus, wherein the ultrasonic sensor transmitting part triggers the phased array unit through a pulse transmitting unit to form square wave sequences with different time sequences, and transmits focused and/or deflected ultrasonic waves to a defect position through a corresponding transmitting probe, the ultrasonic sensor receiving part receives reflected echo signals through the corresponding receiving probe and respectively transmits the echo signals to a data acquisition unit through the phased array unit, the data acquisition unit synthesizes and identifies the echo signals, the phased array unit comprises a plurality of regularly arranged array elements, the phased array unit comprises a linearly arranged phased array unit and a convex array or a concave array phased array unit with direction regularly changed, the linearly arranged phased array units and the convex array or the concave array phased array unit are distributed in a staggered mode, and the control part is used for controlling each phased array unit to output corresponding square wave signals according to different time sequences and controlling the output power and the frequency of a sound source.
And a CAN bus is adopted to expand the multipath ultrasonic sensor. Adopting TJAl040 as a CAN bus transceiver, wherein CAN_H and CAN_L pins of the TJAl040 are respectively connected with a CAN bus through a resistor I, each resistor plays a certain current limiting role to protect the TJAl040 from overcurrent impact, two capacitors are connected in parallel between the CAN_H and the CAN_L and the ground to filter out high-frequency interference and certain electromagnetic radiation on the bus, and a protection diode is reversely connected between two CAN bus access ends and the ground respectively, so that when the CAN bus has higher negative voltage, a certain overvoltage protection effect is realized through the freewheeling of the diode; the two ends of the bus are connected with the resistor II to match the impedance of the bus.
The ultrasonic sensor transmitting part amplifies and outputs square waves generated by the controller by using the driving amplifier, and simultaneously, the controller controls different ultrasonic transmitting heads to output according to different time sequences; the ultrasonic sensor receiving part amplifies the return signal through CX20106A drive and sends the amplified return signal to an external interrupt interface of the singlechip, and when the detection distance is less than or equal to the set distance, the return signal is processed in an interrupt service routine and reported to a processing system through a CAN bus, and fault position information is output.
The front end of the detection system shell is provided with a total probe, a linear array unit, an X-axis convex array concave array phased array unit and a Y-axis convex array concave array phased array unit are sequentially arranged in the total probe, wherein the linear array unit comprises a base and a plurality of regularly distributed array elements positioned on the upper side of the base, the X-axis convex array concave array phased array unit and the Y-axis convex array concave array phased array unit respectively comprise the base and a plurality of regularly distributed array elements positioned on the upper side of a top plate, the directions of the array elements of the X-axis convex array concave array phased array unit are sequentially deviated along one side of the X-axis, and the directions of the array elements of the Y-axis convex array concave array phased array unit are sequentially deviated along one side of the Y-axis.
The convex array and concave array phased array unit comprises a movable base, a base and embedded blocks, wherein base shaft holes are respectively formed in two sides of the lower part of the movable base, V-shaped top surfaces are arranged at the tops of the movable base, supports are respectively arranged on two sides of the base and provided with support shaft holes, the base shaft holes are hinged with the support shaft holes through pin shafts, the embedded blocks are sleeved in an inner cavity of the base, adjacent embedded blocks are fixedly connected in series through pull rods, matching inclined planes are arranged at the tops of the embedded blocks, and the matching inclined planes are matched with the V-shaped top surfaces in a sleeved mode or have matching gaps. The end part of the pull rod is connected with the electromagnetic driving mechanism.
The invention has the beneficial effects that: the system of the invention realizes a mode of time-sharing excitation of a plurality of array elements by establishing a linear array unit and a convex array or concave array unit with direction changed regularly, firstly determines whether a damaged area exists in a detected workpiece, and determines the approximate position of the damaged area by combining the mode of alternate excitation of the linear array, the convex array or the concave array. The damaged area which is easy to confirm can be effectively confirmed through the phased array units which are arranged in a linear mode, but when the convex array or the concave array phased array units are controlled, the area, the position, the shape and other information of the damaged area can be verified and further confirmed, and the reliability and the accuracy of detection are improved.
Drawings
FIG. 1 is an external view of a detecting device according to the present invention.
Fig. 2 is a schematic diagram of the phased array arrangement of fig. 1.
Fig. 3 is a block diagram of the overall layout structure of the system.
Fig. 4 is a CAN bus design.
Fig. 5 is a diagram of a linear array phased array unit.
Fig. 6 is a diagram of a male array-female array phased array unit.
Fig. 7 is a diagram of a phased array cell arrangement relationship.
Fig. 8 is a diagram of the X-axis or Y-axis control mechanism of fig. 7.
Fig. 9 is a partial block diagram of the phased array unit of fig. 8.
Fig. 10 is an assembly relationship diagram of fig. 8.
Fig. 11 is a system part flow chart.
Reference numerals in the drawings: the device comprises a shell 1, a total probe 2, an X-axis convex array and concave array phased array unit 3, a top plate 31, a fixed base 32, a movable base 33, a shaft hole 34, a V-shaped top surface 35, an inner vertical plate 36, an adjusting hole 37, a Y-axis convex array and concave array phased array unit 4, a linear array phased array unit 5, array elements 6, a base 7, a support 71, a shaft hole 72, an inner embedded block 8, a matched inclined plane 81, a pull rod 82, an electromagnetic driving mechanism 9 and a limit adjusting wire 10.
Description of the embodiments
The invention will be further described with reference to the drawings and examples.
Example 1: a magnetic nondestructive testing system based on ultrasonic phased array technology is designed aiming at the current situation that the ultrasonic phased array technology is not fully exerted in the nondestructive testing field at present, and mainly comprises an ultrasonic sensor transmitting part, an ultrasonic sensor receiving part, a control part, a phased array unit, a CAN bus and the like, wherein the system tool is as shown in figure 1, the front end of a shell 1 is provided with a total probe 2, an X-axis convex array concave array phased array unit 3, a Y-axis convex array concave array phased array unit 4 and a linear array arranged phased array unit 5 are distributed in the total probe, and all phased arrays are alternately arranged in a fixed mode or an adjustable mode.
Specifically, the present embodiment employs CAN bus extended multiplexed ultrasonic sensors (ultrasonic probes), each of which includes an ultrasonic wave generating portion and an ultrasonic wave receiving portion, each of which is a basic unit, and an integrated piezoelectric wafer may be employed in consideration of integrated arrangement. As shown in FIG. 3, the CAN bus is utilized to have a good transmission error-proofing design so as to ensure the reliability of data communication, and the design of the multi-path ultrasonic sensor CAN be realized by the intelligent nodes of the CAN bus, thereby greatly saving the hardware resources and the software resources of the system. Since the CAN bus is theoretically unlimited with respect to the number of nodes within the network, the overall design may be flexibly further developed on the CAN bus as the number of phased array units increases.
The phased array unit comprises a plurality of array elements which are regularly arranged, wherein the array elements comprise a linear array unit and a convex array or concave array phased array unit (a plurality of piezoelectric wafers are distributed), the direction of which is regularly changed, and the linear array unit and the convex array or concave array phased array unit are distributed in a staggered way. As shown in fig. 1 and 2, a total probe 2 is provided at the front end of the housing 1, and a linear array phased array unit 5, an X-axis convex array concave array phased array unit 3, and a Y-axis convex array concave array phased array unit 4 are sequentially arranged in the total probe 2. The linear array phased array unit 5 is shown in fig. 5, and comprises a base and a plurality of array elements 6 which are arranged on the upper side of the base and are distributed regularly. The X-axis convex array concave array phased array unit 3 and the Y-axis convex array concave array phased array unit 4 respectively comprise a base and a plurality of regularly distributed array elements positioned on the upper side of a top plate, wherein the array element directions of the X-axis convex array concave array phased array unit 3 are sequentially offset along one side of the X-axis, and the array element directions of the Y-axis convex array concave array phased array unit 4 are sequentially offset along one side of the Y-axis.
The control system is used for controlling the phased array units to output corresponding square wave signals according to different time sequences and controlling the output power and frequency of the sound source. The control part has the main functions of processing information requiring complex calculation, sending the processed information back to the CAN bus and managing the whole network. The main function of the ultrasonic sensor receiving part is to judge the damaged part inside the tool, and the damaged position, shape and other information are transmitted back to the control system through the CAN bus, and the control system performs corresponding processing and continuous control on the ultrasonic sensor transmitting part.
As shown in fig. 4, TJAl040 is adopted as a CAN bus transceiver, and an interface part with a CAN bus also takes anti-interference measures. The CAN_H and CAN_L pins of the TJAl040 are respectively connected with the CAN bus through a 5 omega resistor, and the resistor CAN play a certain role in current limiting to protect the TJAl040 from overcurrent impact. 2 capacitors of 30 pF are connected in parallel between CAN_H and CAN_L and the ground, so that high-frequency interference and certain electromagnetic radiation on the bus CAN be filtered. And a protection diode is reversely connected between the 2 CAN bus connector ends and the ground respectively. When the CAN bus has higher negative voltage, the freewheeling through the diode CAN play a role in overvoltage protection. The 120 omega resistor connected with two ends of the bus has the function of matching the impedance of the bus, and the anti-interference performance and the reliability of data communication are greatly reduced or even the communication cannot be performed by neglecting the resistor. TJAl040 is a high-speed CAN bus transceiver manufactured by Philips semiconductor company that is a complete replacement for PCA82C 250. The device provides an interface between the CAN protocol controller and the physical bus, and differential transmit and receive functions to the CAN bus. TJAl040 has excellent EMC performance, and has ideal passive performance in a non-power-on state; it also provides low power management, supporting remote wakeup. It is worth mentioning that the fail-safe function of TJAl040 provides a pull-up to VCC on pin TXD, which keeps pin TXD at a recessive level when not in use. The pin STB provides a pull-up to VCC and the transceiver enters standby mode when the pin STB is not in use. If VCC is powered down, pins TXD, STB and RXD will become floating, preventing reverse current from being generated through these pins.
In fig. 3 and 4, 6N137 is a photo coupler, the RXDC pin of the controller is used as the input pin of the CAN receiver, and the TXDC port is used as the output pin of the CAN transmitter, and is connected to the CAN transmitter TJAl040 through 6N 137. The purpose of adopting the photoelectric coupler 6N137 is to enhance the anti-interference capability of CAN bus nodes, and the design CAN well realize the electrical isolation among CAN nodes on the bus. The two power sources VCC and V adopted by the optical coupling part circuit must be completely isolated, and can be realized by adopting a special power source isolation module.
The ultrasonic sensor transmitting part triggers the phased array unit through the pulse transmitting unit to form square wave sequences with different time sequences (different time sequences), and transmits focused and/or deflected ultrasonic waves to the defect position through the corresponding transmitting probe. The part of hardware circuit can adopt one of the existing ultrasonic wave transmitting circuits, and the square wave generated by a controller (a singlechip) is amplified and output by a driving amplifier (which is completed by a timer of the singlechip), and meanwhile, different ultrasonic wave transmitting heads are controlled by the controller to output according to different time sequences.
The ultrasonic sensor receiving part receives the reflected echo signals through the corresponding receiving probes, and respectively transmits the echo signals to the data acquisition unit through the phased array unit, and the data acquisition unit synthesizes and identifies the echo signals. When the ultrasonic receiving head receives the square wave signal, the signal is amplified by CX20106A and sent to an external interrupt P1.0 port of a controller (singlechip). After obtaining an interrupt request of external interrupt P1.O, the singlechip is transferred to an interrupt service routine of the external interrupt P1.O for processing, the interrupt service routine sets the shortest distance required to be processed by the controller, and when the distance is smaller than or equal to the set distance, the interrupt service routine processes the shortest distance and reports the processing system through the CAN bus to output fault position information. When the waiting detection distance is smaller than or equal to the set distance, the controller controls the convex array or the concave array phased array units to move or overturn along the X axis or along the Y axis, and when each convex array or concave array phased array unit moves or overturns, the corresponding array element moves or swings by a small angle.
Example 2: on the basis of example 1, a linear array phased array unit 5, an X-axis convex array concave array phased array unit 3, and a Y-axis convex array concave array phased array unit 4 are sequentially arranged in the total probe 2. The linear array phased array unit 5 is shown in fig. 5, and comprises a base and a plurality of array elements 6 which are arranged on the upper side of the base and are distributed regularly. The main body parts of the X-axis convex array and concave array phased array units 3 and the Y-axis convex array and concave array phased array units 4 are closed inner cavities, the top plate of the main body is a square plate and is cut into four right-angled triangles along diagonal lines, and flexible connecting layers are sealed between adjacent side edges of the triangles and between hypotenuses and side walls of the main body. Each array element is distributed in the middle of the corresponding right-angle triangular plate body. The sealing bodies of the units are sequentially communicated through pipelines, and the top plates of the units slightly bulge upwards or slightly collapse downwards by pressing gas or sucking gas into the sealing inner cavities of the units, as shown in fig. 6. The controller controls the standby air pump to charge constant-pressure air into the constant-pressure tank, and simultaneously informs the constant-pressure air pipe exhaust electromagnetic valve to charge air into the main pipeline or controls the pipeline exhaust electromagnetic valve to discharge air. Each time the detection is carried out, the inflation and deflation are carried out sequentially, so that the directions of each array element on the X-axis convex array concave array phased array unit 3 and the Y-axis convex array concave array phased array unit 4 are changed, and the restoration is carried out.
Example 3: on the basis of example 1, this example provides a trimmable X-axis male-female array phased array unit 3 and Y-axis male-female array phased array unit 4 for the X-axis male-female array phased array unit 3 and Y-axis male-female array phased array unit 4 of example 1. Taking the X-axis male array female array phased array unit 3 as an example, as shown in fig. 8 to 10, the base of the male array female array phased array unit includes a movable base 33, a base 7, and an insert 8. The movable base 33 has base shaft holes 34 on both sides of the lower side thereof, and a V-shaped top surface 35 on the top thereof, as shown in fig. 9 (1). The two sides of the base 7 are respectively provided with a support 71, and are provided with support shaft holes 72, and the base shaft holes 34 are hinged with the base main control 72 through pin shafts. The embedded blocks 8 are sleeved in the inner cavity of the base 33, and adjacent embedded blocks 8 are connected in series and fixed together through a pull rod 81. The top of each insert 8 has a mating ramp 81 that mates with the V-shaped top surface 35 or there is a mating gap. The end of the pull rod 82 is connected to the electromagnetic drive mechanism 9. The electromagnetic driving mechanism 9 is used for leading the control shell and the electromagnet at the inner side into the shell of the electromagnetic driving mechanism through the through hole at the outer end of the pull rod 82, and the end part of the pull rod 82 is fixed on the magnetic attraction component (the other end of the pull rod is connected with the reset spring), and the electromagnet can attract the magnetic attraction component in the electrified state. The controller can pull the pull rod 82 when controlling electromagnet to inhale, and then drive all the embedded blocks of establishing ties to remove along X axle or along Y axle simultaneously, and each embedded block can drive corresponding array power swing a little angle when the translation to reset. Or a limit adjusting wire 10 is further arranged at the end part of the electromagnetic driving mechanism, and after the adjusting wire is screwed inwards, the electromagnet can be pushed to move inwards so as to change the limit attraction distance. As shown in fig. 7, when there are two rows of the upper and lower X-axis convex-concave array phased array units 3 and two rows of the Y-axis convex-concave array phased array units 4, the limit action degree of the two electromagnetic driving mechanisms is changed by controlling the limit positions of the corresponding limit wires.
On the basis of the above, as shown in fig. 9 (2), when the inner vertical plate 36 is vertically arranged in the center of the V-shaped top surface 35, a corresponding clamping groove is simultaneously arranged in the center of the upper part of the inner embedded block, so that the inner vertical plate and the corresponding clamping groove are matched and sleeved together. And the pull rod penetrates through the adjusting hole 37 in the middle of the inner vertical plate, and when the pull rod is rotated, the whole camber of the pull rod is utilized to drive each adjacent embedded block to move upwards or downwards, so that richer adjusting options are provided.
In the embodiment, a simple and clear detected target can be determined only through a general phased array, but for target detection of a complex internal structure of a workpiece material, the existence of a damaged position target is determined firstly by continuously switching the direction of a wafer, and then the approximate position of the damaged target is determined jointly according to a plurality of array elements with changed directions.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and are in no way limiting of the invention. Accordingly, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present invention should be included in the scope of the present invention.
Claims (5)
1. The magnetic nondestructive testing system based on ultrasonic phased array technology comprises an ultrasonic sensor transmitting part, an ultrasonic sensor receiving part, a control part, a phased array unit and a CAN bus, wherein the ultrasonic sensor transmitting part triggers the phased array unit through a pulse transmitting unit to form square wave sequences with different time sequences, and transmits focused and/or deflected ultrasonic waves to a defect position through a corresponding transmitting probe, the ultrasonic sensor receiving part receives reflected echo signals through a corresponding receiving probe and respectively transmits the echo signals to a data acquisition unit through the phased array unit, the data acquisition unit synthesizes and identifies the echo signals, the phased array unit comprises a plurality of array elements which are regularly arranged, comprises a linear array unit and a convex array or concave array phased array unit with direction changed regularly, wherein the linear array unit and the convex array or concave array phased array unit are distributed in a staggered way, the control part is used for controlling each phased array unit to output corresponding square wave signals according to different time sequences and controlling the output power and frequency of a sound source, the front end of a detection system shell (1) is provided with a total probe (2), a linear array phased array unit (5), an X-axis convex array concave array phased array unit (3) and a Y-axis convex array concave array phased array unit (4) are sequentially arranged in the total probe (2), the linear array phased array unit (5) comprises a base and a plurality of regularly distributed array elements (6) positioned on the upper side of the base, the X-axis convex array and concave array phased array unit (3) and the Y-axis convex array and concave array phased array unit (4) respectively comprise a base and a plurality of array elements which are regularly distributed and are positioned on the upper side of a top plate, wherein each array element direction of the X-axis convex array and concave array phased array unit (3) is sequentially deviated along one side of the X-axis, each array element direction of the Y-axis convex array and concave array phased array unit (4) is sequentially deviated along one side of the Y-axis, the base of the convex array and concave array phased array unit comprises a movable base (33), a base (7) and an embedded block (8), base shaft holes (34) are respectively arranged on two sides of the lower side of the movable base (33), V-shaped top surfaces (35) are respectively arranged on the tops of the movable base, supporting seats (71) are respectively arranged on two sides of the base (7), the supporting seat shaft holes (72) are hinged together through pin shafts, the base shaft holes (34) and the supporting seat shaft holes (72) are sleeved in an inner cavity of the base (33), adjacent embedded blocks (8) are fixedly connected in series through pull rods (82), the tops of the embedded blocks (8) are provided with inclined surfaces (35) in a matched mode, and the top surfaces of the embedded blocks (8) are matched with each other inclined surfaces (81) in a matched mode, and the top surfaces of the inclined surfaces are matched with each other, and the electromagnetic structures are matched with each other.
2. The ultrasonic phased array technology-based magnetic nondestructive testing system of claim 1, wherein the multi-path ultrasonic sensor is expanded by a CAN bus.
3. The magnetic nondestructive testing system based on the ultrasonic phased array technology according to claim 1 or 2, wherein TJAl040 is adopted as a CAN bus transceiver, CAN_H and CAN_L pins of the TJAl040 are respectively connected with a CAN bus through a resistor I, each resistor plays a certain current limiting role to protect the TJAl040 from overcurrent impact, two capacitors are connected in parallel between the CAN_H and the CAN_L and the ground to filter out high-frequency interference and certain electromagnetic radiation on the bus, a protection diode is reversely connected between an access end of the two CAN buses and the ground respectively, and when the CAN bus has higher negative voltage, the follow current of the diode plays a certain overvoltage protection role; the two ends of the bus are connected with the resistor II to match the impedance of the bus.
4. The ultrasonic phased array technology-based magnetic nondestructive inspection system according to claim 1, wherein the ultrasonic sensor emitting part amplifies the square wave generated by the controller with the drive amplifier to output, and simultaneously the controller controls different ultrasonic emitting heads to output in different timings; the ultrasonic sensor receiving part amplifies the return signal through CX20106A drive and sends the amplified return signal to an external interrupt interface of the singlechip, and when the detection distance is less than or equal to the set distance, the return signal is processed in an interrupt service routine and reported to a processing system through a CAN bus, and fault position information is output.
5. The ultrasonic phased array technology-based magnetic nondestructive testing system according to claim 4, wherein the controller controls the convex array or the concave array phased array units to move or turn over along the X-axis or along the Y-axis when the waiting detection distance is smaller than or equal to the set distance, and the corresponding array units move or swing by a small angle when each convex array or concave array phased array unit moves or turns over.
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| CN101576536A (en) * | 2009-06-18 | 2009-11-11 | 浙江大学 | Multi-mode micro-driving force source based on phased array technology |
| CN103558292A (en) * | 2013-11-08 | 2014-02-05 | 西南交通大学 | Probe array for on-line dynamic train wheel set flaw detection device |
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