CN108802174A - Metal detector - Google Patents
Metal detector Download PDFInfo
- Publication number
- CN108802174A CN108802174A CN201810787157.1A CN201810787157A CN108802174A CN 108802174 A CN108802174 A CN 108802174A CN 201810787157 A CN201810787157 A CN 201810787157A CN 108802174 A CN108802174 A CN 108802174A
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- leading screw
- metal detector
- slide bar
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9006—Details, e.g. in the structure or functioning of sensors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9013—Arrangements for scanning
- G01N27/902—Arrangements for scanning by moving the sensors
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention discloses metal detectors, including a pedestal, including X-axis holder and Y-axis holder；One detection platform, for placing metallic plate to be detected；One eddy current sensor, probe are arranged towards detection platform, there is gap between detection platform；One motion, including X-axis motion and Y-axis motion, X-axis motion drives eddy current sensor to move in the X-axis direction, and Y-axis motion drives detection platform to be moved along Y direction；One controller, the signal for acquiring eddy current sensor and drive motion mechanism.The metal detector of the present invention utilizes EDDY CURRENT principle, the variation of signal is gone out by vortex sensor measuring, then carry out signal processing, judges be tested whether metal works are defective, realizes the detection to measured workpiece defect.
Description
Technical field
The present invention relates to a kind of metal detection instrument, specially a kind of metal detector.
Background technology
The fields such as precision machinery processing, aerospace, intelligence equipment all can largely use metallic plate, plates process
In the detection of crack detection, metal plate defect can help to judge the performance of metallic plate, therefore, in process control and detection in real time
In how to determine whether metallic plate defective and defect level is extremely important.
Although flaw detector is fairly widespread in external application, it is higher to still have cost at home,
Using it is wideless the problems such as.Because external starting is more early, oneself comparative maturity through development of technology, the domestic research starting to it compared with
Evening, and limited by information technology, technology is relatively immature, so metal detector is general or to draw from foreign countries at home
Based on entering, independent development flaw detector is badly in need of in the country, and puts into and be widely used.
Invention content
Present invention aim to address the metal detector of domestic not independent development of the existing technology, need it is high at
The technical issues of this import, provides a kind of widely applied metal detector of performance stabilization energy.
Realize that the technical solution of the object of the invention is metal detector, including：
One pedestal, including X-axis holder and Y-axis holder；
One detection platform, for placing metallic plate to be detected；
One eddy current sensor, probe are arranged towards detection platform, there is gap between detection platform；
One motion, including X-axis motion and Y-axis motion, X-axis motion drives eddy current sensor along X
Axis direction moves, and Y-axis motion drives detection platform to be moved along Y direction；
One controller, the signal for acquiring eddy current sensor and drive motion mechanism.
Preferably, the X-axis motion includes：
One X-axis motor,
One X-axis leading screw, connect with X-axis motor output shaft；
One X-axis slide block is sheathed on X-axis leading screw；
One X-axis displacement sensor is arranged in X-axis leading screw and X-axis motor junction.
Further, the X-axis motion further includes an at least X-axis auxiliary slide bar, the X-axis auxiliary slide bar and X
Axial filament thick stick is arranged in parallel, and the X-axis slide block is sheathed on X-axis auxiliary slide bar.
Further, the quantity of the X-axis auxiliary slide bar is even number, and decile is symmetricly set on X-axis leading screw both sides.
Further, the X-axis motor is direct current generator.
Preferably, the Y-axis motion includes：
One y-axis motor,
One Y-axis leading screw exports axis connection with y-axis motor；
One Y-axis sliding block, is sheathed on Y-axis leading screw；
One Y-axis displacement sensor is arranged in Y-axis leading screw and y-axis motor junction.
Further, the Y-axis motion further includes an at least X-axis auxiliary slide bar, the Y-axis auxiliary slide bar and Y
Axial filament thick stick is arranged in parallel, and the Y-axis slide block set is set on Y-axis auxiliary slide bar.
Further, the quantity of the Y-axis auxiliary slide bar is even number, and decile is symmetricly set on Y-axis leading screw both sides.
Further, the y-axis motor is direct current generator.
Preferably, the metal detector further includes：
At least one limit switch, be arranged X-axis motion either either one or two of Y-axis motion stroke or appoint it is several
A boundary end.
After using above-mentioned technical proposal, the present invention has the effect of as follows positive：(1) eddy current sensor non-can connect
It touches, measure to high linearity, high resolution tested metal object characteristic.When metal object is in changing magnetic field, in metal
Portion just will produce vortex, and magnetic field caused by being vortexed can influence former magnetic field, and the defect on testee can cause to be vortexed close
The variation of degree causes the variation of surrounding magnetic field.The metal detector of the present invention is exactly to utilize EDDY CURRENT principle, is passed by being vortexed
Sensor measures the variation of signal, then carries out signal processing, judges whether tested metal works are defective, realize to measured workpiece
The detection of defect.
(2) motion of the present invention setting X and Y-axis both direction can facilitate, comprehensively detect metallic plate to be measured,
Coordinate displacement sensor with leading screw, accurately and reliably.
(3) present invention setting limit switch, can limit the movement of X-axis slide block and Y-axis sliding block, avoid beyond row
Journey.
Description of the drawings
In order that the present invention can be more clearly and readily understood, right below according to specific embodiment and in conjunction with attached drawing
The present invention is described in further detail, wherein
Fig. 1 is the structural schematic diagram of the metal detector of the present invention.
Fig. 2 is the control block diagram of the metal detector of the present invention.
Fig. 3 is the control figure of the microcontroller of the present invention.
Fig. 4 is the eddy current sensor detection circuit figure of the present invention.
Fig. 5 is the motor-drive circuit figure of the present invention.
Specific implementation mode
Above description is only the general introduction of technical solution of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, and in order to allow above and other objects of the present invention, feature and advantage can
It is clearer and more comprehensible, below the special specific implementation mode for lifting the present invention.
An embodiment of the present invention provides a kind of metal detector, all bought from external high price for solving existing defectoscope
Problem.In order to solve the above technical problem, the present invention provides technical solution general thought it is as follows：
Metal detector, including：One pedestal, including X-axis holder and Y-axis holder；One detection platform, it is to be detected for placing
Metallic plate；One eddy current sensor, probe are arranged towards detection platform, there is gap between detection platform；One motion, packet
Motion containing X-axis and Y-axis motion, X-axis motion drive eddy current sensor to move in the X-axis direction, Y-axis motion
Detection platform is driven to be moved along Y direction；One controller, the signal for acquiring eddy current sensor and drive motion mechanism；
At least one limit switch, be arranged X-axis motion either either one or two of Y-axis motion stroke or appoint several boundaries
End；One terminal plate for collecting the circuit of above-mentioned component, and is electrically connected with the controller.
X-axis motion includes：One X-axis motor, an X-axis leading screw, connect with X-axis motor output shaft；One X-axis slide block, set
On X-axis leading screw；One X-axis displacement sensor is arranged in X-axis leading screw and X-axis motor junction；At least an X-axis auxiliary is slided
Bar, the X-axis auxiliary slide bar are arranged in parallel with X-axis leading screw.Preferably, the quantity of X-axis auxiliary slide bar is even number, and decile is symmetrically set
It sets in X-axis leading screw both sides, X-axis motor is direct current generator
Y-axis motion includes：One y-axis motor, a Y-axis leading screw export axis connection with y-axis motor；One Y-axis sliding block, set
On Y-axis leading screw；One Y-axis displacement sensor is arranged in Y-axis leading screw and y-axis motor junction；At least an X-axis auxiliary is slided
Bar, the Y-axis auxiliary slide bar are arranged in parallel with Y-axis leading screw.Preferably, the quantity of Y-axis auxiliary slide bar is even number, and decile is symmetrically set
It sets in Y-axis leading screw both sides, y-axis motor is direct current generator.
Technical solution of the present invention is described in detail below by attached drawing and specific embodiment, it should be understood that the application
Specific features in embodiment and embodiment are the detailed description to technical scheme, rather than to present techniques
The restriction of scheme, in the absence of conflict, the technical characteristic in the embodiment of the present application and embodiment can be combined with each other.
The terms "and/or", only a kind of incidence relation of description affiliated partner, indicates that there may be three kinds of passes
System, for example, A and/or B, can indicate：Individualism A exists simultaneously A and B, these three situations of individualism B.In addition, herein
Middle character "/", it is a kind of relationship of "or" to typically represent forward-backward correlation object.
(embodiment one)
See Fig. 1, metal detector, including：Pedestal 1, pedestal 1 are made of X-axis holder 1-2 and Y-axis holder 1-1, Y-axis holder
The metallic plate that the size of 1-1 detects as needed is set, general rectangularity, and length direction is used for the movement of detection platform 2；
Detection platform 2 can be moved for placing metallic plate 8 to be detected along the length direction of Y-axis holder 1-1；Eddy current sensor 3 is visited
Head is arranged towards detection platform 2, has gap between detection platform 2, it is ensured that connect with metallic plate 8 after placing metallic plate 8 to be detected
Closely but do not contact；Motion 4, including X-axis motion 4-2 and Y-axis motion 4-1, X-axis motion 4-2 drives whirlpool
Flow sensor 3 moves in the X-axis direction, and Y-axis motion 4-1 drives detection platform 2 to be moved along Y direction；Controller 5, is used for
Acquire the signal and drive motion mechanism of eddy current sensor, built-in control circuit；Four limit switches 6, setting are moved in Y-axis
Two boundary ends of mechanism 4-1 strokes are (when Y-axis motion 4-1 is with 2 motion contact of detection platform to limit switch 6, Y-axis
Motor 4-1-1 power supplys disconnect, and y-axis motor 4-1-1 no longer works) and the two boundary ends being formed X-axis motion 4-2；It connects
Line plate 7 is arranged in the side of Y-axis holder 1-1, for collecting the circuit of above-mentioned component, and is electrically connected with controller 5, this
Sample can be mixed and disorderly to avoid circuit, influences to use.
Specifically, X-axis motion 4-2 includes：X-axis motor 4-2-1, X-axis leading screw 4-2-2, X-axis slide block 4-2-3, X
Axle position displacement sensor 4-2-4 and two X-axis auxiliary slide bar 4-2-5.X-axis leading screw 4-2-2 exports axis connection with X-axis motor 4-2-1,
The 4-2-1 driving X-axis leading screw 4-2-2 rotations of X-axis motor；X-axis slide block 4-2-3 is sheathed on X-axis leading screw 4-2-2 and X-axis auxiliary slide bar
On 4-2-5, and connect eddy current sensor 3；X-axis displacement sensor 4-2-4 is arranged in X-axis leading screw 4-2-2 and X-axis motor 4-2-1
Junction；Two X-axis auxiliary slide bar 4-2-5 and X-axis leading screw 4-2-2 are arranged in parallel, and decile is arranged in the both sides X-axis leading screw 4-2-2,
X-axis motor 4-2-1 is direct current generator (DC12V decelerating motors).The 4-2-1 operatings of X-axis motor drive the 4-2-2 rotations of X-axis leading screw,
So that X-axis slide block 4-2-3 can be moved along the setting direction of X-axis leading screw 4-2-2 on X-axis leading screw 4-2-2, to band
Dynamic eddy current sensor 3 moves.
Similar, Y-axis motion 4-1 includes：Y-axis motor 4-1-1, Y-axis leading screw 4-1-2, Y-axis sliding block 4-1-3, Y-axis
Displacement sensor 4-1-4 and two Y-axis auxiliary slide bar 4-1-5.Y-axis leading screw 4-1-2 exports axis connection, Y with y-axis motor 4-1-1
Spindle motor 4-1-1 driving Y-axis leading screw 4-1-2 rotations；Y-axis sliding block 4-1-3 is sheathed on Y-axis leading screw 4-1-2 and Y-axis auxiliary slide bar 4-
On 1-5, end face and the bottom surface of detection platform 2 are fixed thereon；Y-axis displacement sensor 4-1-4 is arranged in Y-axis leading screw 4-1-2 and Y-axis
The junctions motor 4-1-1；Two Y-axis auxiliary slide bar 4-1-5 and Y-axis leading screw 4-1-2 are arranged in parallel, and decile is arranged in Y-axis leading screw
The both sides 4-1-2, y-axis motor 4-1-1 are direct current generator (DC12V decelerating motors).Y-axis motor 4-1-1 operatings, drive Y-axis leading screw
4-1-2 rotates, so that Y-axis sliding block 4-1-3 can be along the setting direction of Y-axis leading screw 4-1-2 on Y-axis leading screw 4-1-2
It is mobile, to drive detection platform 2 to move.
2 displacement sensors can use grating sensor, grating sensor by grating reading head (HEDS-9731) and
100 line grating code-discs, the metal code disk overall diameter 45mm of grating encoder.
In Fig. 1, the Y-axis screw travel of motion 4 is 120mm, and leading screw screw pitch is 2mm.One circle of motor rotation, detection
Platform 2 drives 8 advance 10mm of metallic plate to be detected, high-precision grating reading head to export 100 pulse signals.The monolithic of controller 5
It is machine-readable to take pulse number, you can detection platform displacement distance is calculated, is then compared with target range, adjustment motor rotation side
To and rotational angle, formed closed-loop control system, realize precise motion.The movement control mode of X-direction is consistent with Y-axis.
In order to clearly accurately know the coordinate of defect, detection platform 2 can be made bigger, be carved in detection platform 2
Coordinate system is drawn to remain to be judged by the coordinate of surrounding although metallic plate to be measured can cover most of coordinate system.It can also
It is coordinate system to be drawn on metallic plate to be measured, but this mode is slightly inefficient.More preferably mode is：One projector mechanism is set, throwing is made
Coordinate system can steadily be projected metal sheet surface to be detected by shadow mechanism.
(embodiment two)
As shown in Figures 2 to 5, show the control circuit for the controller that can be used for embodiment one.
Control circuit includes three big cores, microcontroller, eddy current sensor detection circuit and motor-drive circuit.
As shown in Fig. 2, controller includes microcontroller, keyboard, display screen, motor-drive circuit, eddy current sensor detection electricity
Road and communication module.Microcontroller is core, and using STM32F103 microcontrollers, controller passes through microcontroller output pwm signal to electricity
Drive circuit, the directions control X/Y motor operation, so as to adjust position of the eddy current sensor coil on metallic plate 8 to be checked, whirlpool
The voltage signal of flow sensor detection circuit output variation, by A/D converter inside microcontroller to voltage signal processing, and with it is pre-
If numerical value is compared judgement, metal works defects detection is completed.Specific microcontroller block diagram is as shown in figure 3, STM32F103 is mono-
Piece machine is the 32-bit microprocessor based on Cortex M3, powerful, resourceful, shares the FLASH memory of 256KB, most
High working frequency is up to 72MHz, has monocycle multiplication and hardware division, arithmetic speed is fast, and GPIO is powerful.Wherein, PB
16, mouth is configured to recommending output mode, carries out parallel communications with display screen, PC mouthfuls for controlling display screen.PD oral areas separate foot use
In the positive and negative rotation of control X/Y axis direct current generators.
As shown in figure 4, eddy current sensor detection circuit is made of oscillating circuit, filter circuit and emitter follower.Vortex
The probe coil of sensor 3 and is fixed on coil brace by the coil at flat pattern of multiply enameled wire coiling, and coil connects
Enter and (be denoted as L3 in figure) between the collector and ground of the triode T1 of detection circuit, by with measured conductor (metallic plate to be measured
Be equivalent to conductor) between vortex field interactions, produce measured signal to probe segment.
Oscillating circuit includes resistance R3 (2.4K ohm of resistance value), variable resistance RW1 (50K ohm of resistance value), resistance R7 (resistance values
3.3K ohm), resistance R9 (100K ohm of resistance value), resistance R2 (220 ohm of resistance value), resistance R1 (1.5K ohm of resistance value), three poles
Pipe T1 (model S9015), capacitance C1 (capacitance 0.1uF), capacitance C2 (capacitance 100pF), capacitance C8 (capacitance 820pF) and inductance L1
(10mH).A termination 5V power supplys of resistance R1, one end of another termination inductance L1；The other end of inductance L1 divides two-way, connects all the way
One end of resistance R2, another way are connected between capacitance C2 and capacitance C8；The emitter of another termination triode T1 of resistance R2；Three
The base stage of pole pipe T1 connect with one end of one end of variable resistance RW1, capacitance C1 simultaneously, collector and meanwhile with resistance R4 one
The anode connection of diode D1 in end, one end of capacitance C3, one end of capacitance C2 and filter circuit；A termination 5V of resistance R3
Power supply, the other end are connect with one end of variable resistance RW1；The other end of variable resistance RW1 is connected in one end of resistance R7；Capacitance
The other end of C2 is connect with one end of capacitance C8；The other end, the electricity of the other end of resistance R7, the other end of resistance R9, capacitance C4
The other end for holding C8 is all grounded.Oscillating circuit is vibrated using capacitance three-point type, its advantage is that waveform is good, frequency of oscillation is steady
It is qualitative good, and frequency can accomplish it is very high, up to tens to hundreds of megahertzs.If tested metallic plate 8 is defective, sensor is visited
Head coil equivalent inductance amount is reduced, and resonant tank is in resonant condition, and the voltage magnitude of oscillator signal increases, and frequency increases.Such as
When fruit is tested 8 zero defect of metallic plate, the equivalent inductance amount in eddy current coil increases, and resonant tank is detuning, and equivalent impedance occurs
Variation makes output signal voltage amplitude decline.
Oscillator signal is filtered after diode D1 detections by filter circuit.Filter circuit includes diode D1 (types
Number 1N4148), capacitance C3 (1000pF), inductance L2 (830mH), resistance R5 (3.3K ohm) and capacitance C5 (1000pF).Two poles
The cathode of pipe D1 connects one end of one end and inductance L2 of capacitance C3 simultaneously；One end of another terminating resistor R5 of inductance L2；Resistance
One end of another termination capacitor C5 of R5, while connecing one end of the resistance R6 of emitter follower output circuit；Capacitance C3's and C5 is another
End ground connection.
The output stage of eddy current sensor detection circuit is high using input resistance, transmits signal efficiency height, and carrying load ability is strong
Emitter follower output circuit exported.Emitter follower output circuit include capacitance R6 (100K ohm), resistance R4 (220 ohm),
Resistance R8 (3.3K ohm), triode T2 (model 2N5551), capacitance C7 (0.1uF), tantalum capacitance C6 (47uF).The one of resistance R4
Terminate 5V power supplys, the collector of another termination triode T2；One end of the base stage connecting resistance R6 of triode T2, emitter connecting resistance
One end of R8, one end of capacitance C7, capacitance C6 anode, while connecing the PA5 pins of microcontroller；The other end, the capacitance of resistance R8
The other end of C7, the cathode ground connection of capacitance C6.The DC voltage of emitter follower output circuit output is sent to STM32 microcontrollers PA5 and draws
Foot carries out analog-to-digital conversion using A/D converter inside microcontroller.
The eddy current sensor detection circuit output voltage that the present embodiment uses is adjustable, can be adjusted according to follow-up A/D
It is whole, high sensitivity, the voltage change of the accurate each coordinate points of metallic plate to be measured of energy, and also it is at low cost, detection circuit has discrete electronics
Component is constituted, and device price is relatively inexpensive relative to integrated chip.Output end uses large capacity tantalum capacitor filtering, reliability simultaneously
Height, entire circuit are powered using DC5V, and circuit is facilitated to be designed with interface microcontroller.
Motor-drive circuit is as shown in figure 5, be the constant-current drive circuit being made of U1 (model L298N).L298N is
The product of SGS companies, Multiwatt encapsulation, inside includes 4 channel logic drive circuits, can drive two direct current generators, can connect
By standard TTL logic level, output current reaches 2.5A, can drive inductive load.The direct current generator of X-axis and Y-axis is believed using PWM
Number stepless speed control mode.Two pins of microcontroller PD1, PD2 meet enabled pin EN_A, the EN_B of L298N respectively, and OUT1~OUT4 is defeated
Go out pwm signal, control X-axis, y-axis motor rotating speed；IN1~IN4 connects PD12~PD15 of microcontroller, the high electricity of microcontroller output respectively
Gentle low level realizes the actions such as start and stop, the positive and negative rotation of direct current generator.Series resistor is distinguished between the ends IN1~IN4 and microcontroller
R5~R8 (being all 100 ohm respectively), resistance value are that 10K ohm of resistance R1~R4 mono- terminates 5V power supplys, and one end meets IN1 respectively
~IN4.8,1,15 feet of U1 are grounded.Electrical-coil both sides in operation process will produce back-emf, is formed and is impacted to L298N,
Easily cause damage, particularly greater than supply voltage and negative voltage be easier to damage L298N, so in OUT1~OUT4 outputs
2 diodes (generally using 1N4007) are all added on every line to be protected.Diode protection principle is as follows：When back-emf is
Just, when being more than power supply+0.7V, upper end diode current flow, such output line is just limited on supply voltage+0.7V, Bu Huichao
Cross this numerical value (to power source charges).When back-emf be it is negative, be less than -0.7V when, lower end diode current flow, such output line just by
Limit is not less than -0.7V on -0.7V.The two diodes are used as clamp so that voltage on output line (or
It is current potential) it is clamped between -0.7V~+Vcc+0.7V.
The motor-drive circuit driving capability that the present embodiment uses is strong, has two-way output, can drive two motor DCs
Motor or stepper motor, strong antijamming capability, fever is low, is controlled using standard logic levels signal, supports PWM speed governing,
And output current is big, and immediate current (is changed to up to 3A, continue working electric current position：For) 2A.
(embodiment three)
The detection method of the metal detector of the present embodiment is：
Step 1: preparing the metal detector as described in embodiment one and embodiment two；
Step 2: selection detection pattern, detection pattern includes detection manually and automatic detection；
Step 3: when detecting manually, eddy current sensor and detection platform are adjusted with the button of keyboard, search coil is made to move
To specified coordinate points, defect is then detected；If defective, controller alarm, defects count adds one automatically, and is showing
The coordinate of the screen display defect；
When automatic detection, eddy current sensor automatically returns to coordinate origin first, is then examined by column to metallic plate to be measured
It surveys, real-time display search coil coordinate value, until it is scanned, complete entire detection.
About the acquisition of coordinate, preferably by coordinate projection to detection platform, namely it is projected on metallic plate to be measured,
Operator's naked eyes can carry out flaw and (be changed to：Defect) position determination.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical solution and advantageous effect
It describes in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the guarantor of the present invention
Within the scope of shield.
Claims (10)
1. metal detector, it is characterised in that including：
One pedestal, including X-axis holder and Y-axis holder；
One detection platform, for placing metallic plate to be detected；
One eddy current sensor, probe are arranged towards detection platform, there is gap between detection platform；
One motion, including X-axis motion and Y-axis motion, X-axis motion drives eddy current sensor along X-axis side
To movement, Y-axis motion drives detection platform to be moved along Y direction；
One controller, the signal for acquiring eddy current sensor and drive motion mechanism.
2. metal detector according to claim 1, it is characterised in that：
The X-axis motion includes：
One X-axis motor,
One X-axis leading screw, connect with X-axis motor output shaft；
One X-axis slide block is sheathed on X-axis leading screw；
One X-axis displacement sensor is arranged in X-axis leading screw and X-axis motor junction.
3. metal detector according to claim 2, it is characterised in that：
The X-axis motion further includes at least X-axis auxiliary slide bar, and slide bar is parallel with X-axis leading screw sets for the X-axis auxiliary
It sets, the X-axis slide block is sheathed on X-axis auxiliary slide bar.
4. metal detector according to claim 3, it is characterised in that：
The quantity of the X-axis auxiliary slide bar is even number, and decile is symmetricly set on X-axis leading screw both sides.
5. metal detector according to claim 4, it is characterised in that：The X-axis motor is direct current generator.
6. metal detector according to claim 1, it is characterised in that：
The Y-axis motion includes：
One y-axis motor,
One Y-axis leading screw exports axis connection with y-axis motor；
One Y-axis sliding block, is sheathed on Y-axis leading screw；
One Y-axis displacement sensor is arranged in Y-axis leading screw and y-axis motor junction.
7. metal detector according to claim 6, it is characterised in that：
The Y-axis motion further includes at least Y-axis auxiliary slide bar, and slide bar is parallel with Y-axis leading screw sets for the Y-axis auxiliary
It sets, the Y-axis slide block set is set on Y-axis auxiliary slide bar.
8. metal detector according to claim 7, it is characterised in that：
The quantity of the Y-axis auxiliary slide bar is even number, and decile is symmetricly set on Y-axis leading screw both sides.
9. metal detector according to claim 8, it is characterised in that：The y-axis motor is direct current generator.
10. the metal detector according to one of claim 1 to 8, it is characterised in that：The metal detector further includes：
At least one limit switch, be arranged X-axis motion either either one or two of Y-axis motion stroke or appoint several boundaries
Limit end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810787157.1A CN108802174A (en) | 2018-07-16 | 2018-07-16 | Metal detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810787157.1A CN108802174A (en) | 2018-07-16 | 2018-07-16 | Metal detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108802174A true CN108802174A (en) | 2018-11-13 |
Family
ID=64077344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810787157.1A Withdrawn CN108802174A (en) | 2018-07-16 | 2018-07-16 | Metal detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108802174A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109252929A (en) * | 2018-11-16 | 2019-01-22 | 上海歌地催化剂有限公司 | For testing the aided-detection device and its test method of ammonia uniformity |
-
2018
- 2018-07-16 CN CN201810787157.1A patent/CN108802174A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109252929A (en) * | 2018-11-16 | 2019-01-22 | 上海歌地催化剂有限公司 | For testing the aided-detection device and its test method of ammonia uniformity |
| CN109252929B (en) * | 2018-11-16 | 2024-06-07 | 上海歌地催化剂有限公司 | Auxiliary detection equipment for testing ammonia uniformity and testing method thereof |
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