CN106198728A - The multichannel of a kind of adhesive bonding of composites structure taps detection device - Google Patents
The multichannel of a kind of adhesive bonding of composites structure taps detection device Download PDFInfo
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- CN106198728A CN106198728A CN201610499896.1A CN201610499896A CN106198728A CN 106198728 A CN106198728 A CN 106198728A CN 201610499896 A CN201610499896 A CN 201610499896A CN 106198728 A CN106198728 A CN 106198728A
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- striking head
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- adhesive bonding
- electromagnetic hammer
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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
- G01N29/045—Analysing solids by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
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- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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Abstract
The multichannel that the invention discloses a kind of adhesive bonding of composites structure taps detection device, and it includes drive circuit, modulate circuit, N number of electromagnetic hammer and N number of striking head, striking head and electromagnetic hammer one_to_one corresponding.Built-in two solenoids of electromagnetic hammer drive under the effect of electric current alternately break-make driving control circuit, produce electromagnetic force up and down alternately, metal litter is attracted to drive striking head to pump, striking head taps part surface to be checked, pressure signal is converted into the signal of telecommunication by its built-in piezoelectric transducer, is transferred to drive control circuit to amplify, export modulated signal more afterwards.This device sensitivity is high, it is high to tap frequency, reliability is high, can be used in adhesive bonding of composites structure automation detecting system, reduces cost, improves efficiency.
Description
Technical field
The multichannel that the present invention relates to a kind of adhesive bonding of composites structure taps detection device, belongs to Non-Destructive Testing application neck
Territory.
Background technology
Adhesive bonding of composites structure is that space flight Product Development produces one of important structure.It is widely used in delivery fire
In arrow, strategic missile, Satellite Product, such as rocket trousers, satellite support.Owing to adhesive bonding of composites structure member uses manual
Operation, Job-shop producteion, and manufacturing condition are difficult to strictly control, and components interior easily exists the unsticking affecting serviceability
Defect.The bonding quality of cementing structure parts is carried out Non-Destructive Testing, is the important guarantee of model reliability.
Ultrasonic water spray penetrates, acoustic resonance, low frequency ultrasound, laser speckle, percussion are that actual application is more
Bonding quality lossless detection method.Wherein, the detection sensitivity of ultrasonic water spray through-transmission technique, testing result reliability are the highest, eyelid covering
Thickness is less on power of test impact, but must develop special detecting system according to the planform of product, and detects
In journey, product contacts larger amount of water, and complex structure product detection difficulty is big；Acoustic resonance, low frequency ultrasound, laser speckle side
Method be mainly used in thin skin product bonding quality detection, but detection sensitivity with product skin thickness increase significantly
Decline；Tap detection and be presently mainly manual percussion detection, have the advantages that detection is easy to operate, detection sensitivity is higher, but
Defect result is by artifical influence factor.
Tap in detection Dynamic Non-Destruction Measurement manual, need operator to use headend equipment (as tapped hammer) to measured piece
Tap with suitable power and speed, hammer built-in sensor device acquisition characteristics signal into shape by tapping and make subsequent treatment.
But, tap hammer by artificial to by geodesic structure exciting (percussion), therefore, different operator's dynamics is differentiated.Although
Require that operator uses continuous, suitable dynamics as far as possible, but same operator can not be completely eliminated and detect and different every time
Operator detects the difference between the dynamics of use, and these different responses are to the difference in primary signal being signal amplitude.
Summary of the invention
Solved by the invention technical problem is that: overcome the deficiencies in the prior art, it is provided that a kind of highly sensitive, tap frequency
The multichannel of the adhesive bonding of composites structure high, reliability is high taps detection device.
The technical scheme is that the multichannel of a kind of adhesive bonding of composites structure taps detection device, this device bag
Include drive circuit, modulate circuit, N number of electromagnetic hammer and N number of striking head, striking head and electromagnetic hammer one_to_one corresponding, N >=1, wherein:
Drive circuit, receives the control signal of outside input, produces 2N road driving current signal, export to N number of electricity simultaneously
Magnetic is hammered into shape；
Modulate circuit, receives the knocking that N number of striking head gathers, after being amplified knocking, filter and comparing
Generate modulated signal and export external equipment；
Electromagnetic hammer, including two solenoids, magnet piece and metal slide bar；Two solenoids are by the contrary hand of spiral
Being separately fixed at the upper and lower two ends of metal frame, metal slide bar passes in the middle of the solenoid of lower end, and upper end is fixing connects ferromagnetism
The ferromagnetic block that material is made, lower end is fixing connects striking head, leaves certain intervals between two solenoids, makes the ferromagnetic block can be
Between two solenoids up and down；The two-way driving current signal that drive circuit sends is respectively connecting to two electromagnetic wires
Circle, two-way drives current cycle cycle alternation to occur, makes electric current in two solenoids replace break-make, thus drive metal slide bar
Pump；
Striking head, is fixedly connected on the metal slide bar end of electromagnetic hammer, repeatedly taps measured object with metal slide bar, tested
Object deforms upon and produces resilience force under the active force of striking head, and striking head is internal containing piezoelectric transducer, piezoelectric sensing
Device detection resilience force, is converted into resilience force knocking and exports modulate circuit.
Described drive circuit includes first input port, the second input port, two resistance R1 and R2, two audion Q1
With Q2, first input port and the second input port connect one end of resistance R1 and R2, resistance R1 and the R2 other end respectively respectively
Connecting the base stage of Q1 and Q2, the colelctor electrode of Q1 and Q2 connects the first solenoid L1 in electromagnetic hammer and the second solenoid respectively
The equal ground connection of emitter stage of L2, Q1 and Q2.
Described modulate circuit includes operational amplifier INA118, comparator LM393, resistance R1, R2, R3, R4, R5, electric capacity
C1；
The differential input end of operational amplifier INA118 is the input of modulate circuit, respectively by resistance R1, resistance R2
Being pulled to datum, negative power supply end ground connection, positive electrical source connects power supply, and input reference edge connects datum,
The outfan of operational amplifier connects one end of R4, and the other end of R4 is divided into two-way, and a road connects electric capacity C1, the other end of electric capacity C1
Ground connection, another road is connected to the electrode input end of comparator LM393 as the output of signal；The negative pole input of comparator LM393
End connects datum, negative power supply end ground connection, and cathode power supply termination power supply, the outfan of comparator is modulate circuit
Output, is pulled to power supply by resistor R5.
Described striking head uses by the material package of resin with conductive metal powder solidification.
Described conductive metal powder is tungsten powder.
The present invention compared with prior art has the beneficial effect that
(1) present invention use the signal of telecommunication control electromagnetic hammer percussion campaign, can efficiently control tap hammer frequency with
Dynamics, will not damage detected member because excessively tapping, and dynamics can control ratio is more uniform, tap that frequency is high, reliability is high.
(2) present invention uses two solenoids and a metal slide bar to make electromagnetic hammer, drives electric current to divide by two-way
Kong Zhi not replace break-make by solenoid, it is achieved the reciprocating motion of metal slide bar.Electromagnetic hammer on existing market is mainly by single electromagnetism
Coil and spring composition, be easily generated during its spring reset and shake and uncontrolled, for this electromagnetic hammer, according to this
Bright made electromagnetic hammer taps process and is controlled completely, has good Detection results.
(3) present invention uses resin and metal dust solidification to form material package, can improve the damping of striking head, effectively
The impact on transmission result of the suppression piezoelectric transducer natural frequency, makes output result mainly show as piezoelectric transducer by acceleration
The forced vibration of shock loading.
(4) present invention uses multichannel to tap mode, compares single channel and taps detection, substantially increases percussion detection effect
Rate.
Accompanying drawing explanation
Fig. 1 is that multichannel of the present invention taps detection device schematic diagram；
Fig. 2 is embodiment of the present invention electromagnetic hammer and striking head structural representation；
Fig. 3 is that the embodiment of the present invention taps drive circuit figure.
Fig. 4 is that embodiment of the present invention electromagnetic hammer drives current diagram；
Fig. 5 is embodiment of the present invention modulate circuit figure；
Fig. 6 (a) is that the embodiment of the present invention taps position for knocking schematic diagram during splicing good area；
Fig. 6 (b) is that the embodiment of the present invention taps knocking schematic diagram when position is unsticking region.
Detailed description of the invention
With embodiment, the present invention is described in further detail below in conjunction with the accompanying drawings:
Fig. 1 is that the multichannel of a kind of adhesive bonding of composites structure taps detection device schematic diagram.As it can be seen, this multichannel
Tap detection device and include drive circuit, modulate circuit, N number of electromagnetic hammer and N number of striking head, striking head and electromagnetic hammer one a pair
Should, wherein:
Drive circuit, receives the control signal of outside input, produces 2N road driving current signal, export to N number of electricity simultaneously
Magnetic is hammered into shape；
Modulate circuit, receives the knocking that N number of striking head gathers, after being amplified knocking, filter and comparing
Generate modulated signal and export external equipment；
Electromagnetic hammer, including two solenoids and a metal slide bar；Two solenoids are divided by the contrary hand of spiral
Not being fixed on the upper and lower two ends of metal frame, metal slide bar passes in the middle of the solenoid of lower end, and upper end is fixing connects ferromagnetism material
The ferromagnetic block made of material, lower end is fixing connects striking head, leaves certain intervals between two solenoids, makes the ferromagnetic block can be two
Between individual solenoid up and down；The two-way driving current signal that drive circuit sends is respectively connecting to two solenoids,
In two solenoids, electric current replaces break-make, and first solenoid produces magnetic force under the driving of first via current signal, inhales
Armature (iron) magnetic piece drives metal slide bar to move upward, and second solenoid produces magnetic force under the driving of the second road current signal,
Attracting ferromagnetic block to drive metal slide bar to move downward, two-way drives current cycle cycle alternation to occur, thus drives metal slide bar
Pump；
Striking head, is fixedly connected on the metal slide bar end of electromagnetic hammer, repeatedly taps measured object with metal slide bar, tested
Object deforms upon and produces resilience force under the active force of striking head, and striking head is internal containing piezoelectric transducer, piezoelectric sensing
Device detection resilience force, is converted into resilience force knocking and exports modulate circuit.
Fig. 2 is the present embodiment electromagnetic hammer and striking head structural representation, as it can be seen, electromagnetic hammer by two solenoids 1,
Ferromagnetic block 2 and a metal slide bar 3 are constituted, and two of which solenoid is separately fixed at metal frame 6 by the contrary hand of spiral
Two ends up and down, ferromagnetic block 2 is fixed on metal slide bar upper end；Striking head, by piezoelectric chip sensor 4 and synthetic plastic tup 5 groups
Becoming, striking head is fixed on the lower end of metal slide bar.Described piezoelectric transducer 4 with piezoelectric chip realize, described striking head use by
The material package that resin solidifies with conductive metal powder, described conductive metal powder is tungsten powder.This encapsulation can improve percussion
The damping of head, the effectively suppression piezoelectric transducer natural frequency impact on transmission result, make output result mainly show as piezoelectricity
Sensor is by the forced vibration of acceleration shock loading.
According to Fig. 3, described drive circuit include first input port (port1), the second input port (port2),
Two resistance R1 and R2, two audion Q1 and Q2, first input port (port1) and the second input port (port2) are respectively
Connecting the base stage that one end of resistance R1 and R2, resistance R1 and the R2 other end connect Q1 and Q2, the colelctor electrode of Q1 and Q2 connects respectively
The first solenoid L1 in electromagnetic hammer and the emitter stage of the second solenoid L2, Q1 and Q2 ground connection respectively, work as first input end
Mouth (port1) input high level, during the second input port (port2) input low level, the base-emitter at R1 and Q1 produces
Electric current, this electric current produces electric current at Q1 colelctor electrode after audion amplifies and flows through the first solenoid L1, the first solenoid L1
Producing magnetic force after being electrified stream, now there is not base current in the base-emitter of R2 and Q2, does not has electric current stream at Q2 colelctor electrode
Magnetic force is not produced through the second solenoid L2, the second solenoid L2；First solenoid L1 upwards attracts the iron block on slide bar,
Drive striking head moves upward；When input port 1 input low level, during input port 2 input high level, at the base of R1 and Q1
There is not electric current in pole-emitter stage, does not has electric current to flow through the first solenoid L1, the first solenoid L1 at Q1 colelctor electrode and do not produce
Magnetic force, now the base-emitter of R2 and Q2 produces base current, and this electric current produces electricity at Q2 colelctor electrode after audion amplifies
Stream flows through the second solenoid L2, the second solenoid L2 and produces magnetic force, and the second solenoid L2 attracts downwards the ferrum on slide bar
Block, drives striking head to move downward.
Drive circuit drives electric current to control two solenoids respectively and replace break-make by two-way, it is achieved metal slide bar past
Multiple motion.Electromagnetic hammer on existing market is mainly made up of single electromagnetic winding and spring, be easily generated during its spring reset concussion and
Uncontrolled, for this electromagnetic hammer, tap process according to the electromagnetic hammer made by the present invention and be controlled completely, tool
There is good Detection results.And, use the signal of telecommunication to control the percussion campaign of electromagnetic hammer, the frequency tapping hammer can be efficiently controlled
Rate and dynamics, will not damage detected member because excessively tapping, and dynamics can control ratio is more uniform, tap frequency high, reliable
Property high.
The two-way input voltage signal being carried on electromagnetic hammer, for two-way square-wave signal, the signal of input port 2 and input
Signal phase is contrary, and when i.e. the signal of input port 1 is high level, the signal of input port 2 is low level, input port 1
When signal is low level, the signal of input port 2 is high level.The magnetic force that solenoid produces is by by the electric current of coil certainly
Fixed, may be by the percussion dynamics of the Control of Voltage Electrical heads of regulation input port and percussion frequency.The present embodiment can long time
Between be operated in 20Hz and tap under frequency.
Tap the power consumption of detection device in order to reduce multichannel, reduce solenoid heating, solenoid is played protection
Effect, extends its service life.Before the electric current of first solenoid of release, the signal that can control input port 1 first will
Voltage reduces, and keeps a period of time, until becoming low level again when the signal of input port 2 becomes high level.Such as Fig. 4 institute
Showing, the input signal 1 of the first port is a cycle adjustable square-wave signal, and this signal packet contains three level, and its order depends on
Secondary respectively (4～5) V level, the level of (3.5～4) V and low level.The signal period of control signal 2, should with control signal 1
Signal packet contains two level, and its order is followed successively by low level and high level (4～5) V level.Wherein high level action time and control
The low level effect moment of signal 1 processed and duration are equal.
Modulate circuit includes operational amplification circuit, filter circuit and comparison circuit, and operational amplification circuit is for defeated by outside
The knocking entered exports to filter circuit after being amplified, filter circuit carries out low-pass filtering to the signal after amplifying and eliminates letter
Burr on number, exports afterwards to comparison circuit, and comparison circuit is for carrying out filtered signal with the reference signal preset
Relatively, obtain square-wave signal to export as modulated signal.
According in Fig. 5, this example, modulate circuit is by operational amplifier INA118, comparator LM393, resistance R1, electricity
Resistance R2, resistance R3, resistance R4, resistance R5, electric capacity C1 are constituted, it is characterised in that:
The differential input end of operational amplifier INA118 receives the signal of telecommunication of piezoelectric transducer output, connects 2M pull-up electricity respectively
Resistance R1, resistance R2 to datum (1.65V), negative power supply end ground connection, cathode power supply termination power supply (3.3V), input ginseng
Examine end and connect datum (1.65V)；The outfan of operational amplifier connects one end of R4, and the other end of R4 is divided into two-way, and one
Road meets electric capacity C1, the other end ground connection of C1, and resistance R4 and electric capacity C1 shaping filter, another road is connected to as the output of signal
The electrode input end of comparator LM393.
The negative input of comparator LM393 connects datum (1.7V), negative power supply end ground connection, and cathode power supply terminates
Power supply (3.3V), the outfan of comparator is the output of modulate circuit, is pulled to power supply by resistor R5
(3.3V)。
Striking head taps glueds joint good area and unsticking region, and its contact force, difference time of contact, in the built-in pressure of striking head
The size of electric transducer perception time of contact, by measuring the signal of telecommunication pulse width of piezoelectric transducer output, detection product is
No there is debonding defect.According to Fig. 6, the knocking of output is square-wave signal, when tapping position and glueing joint good area,
The signal of telecommunication pulse of output is narrow, as shown in Fig. 6 (a)；When tapping position and being unsticking region, the signal of telecommunication pulse width of output, as
Shown in Fig. 6 (b).
The detected structure that the present invention is suitable for has: honeycomb cementing structure, foamed sandwich structure, plate plate cementing structure.It is suitable for
Tap skin thickness scope :≤1.5mm.
The above, the detailed description of the invention that only present invention is optimal, but protection scope of the present invention is not limited thereto,
Any those familiar with the art in the technical scope that the invention discloses, the change that can readily occur in or replacement,
All should contain within protection scope of the present invention.
The content not being described in detail in description of the invention belongs to the known technology of professional and technical personnel in the field.
Claims (5)
1. the multichannel of an adhesive bonding of composites structure taps detection device, it is characterised in that include drive circuit, conditioning electricity
Road, N number of electromagnetic hammer and N number of striking head, striking head and electromagnetic hammer one_to_one corresponding, N >=1, wherein:
Drive circuit, receives the control signal of outside input, produces 2N road driving current signal, export to N number of electromagnetic hammer simultaneously；
Modulate circuit, receive N number of striking head gather knocking, knocking is amplified, filter and after generate
Modulated signal exports external equipment；
Electromagnetic hammer, including two solenoids, magnet piece and metal slide bar；Two solenoids are by the contrary hand of spiral respectively
Being fixed on the upper and lower two ends of metal frame, metal slide bar passes in the middle of the solenoid of lower end, and upper end is fixing connects ferrimagnet
The ferromagnetic block made, lower end is fixing connects striking head, leaves certain intervals between two solenoids, makes the ferromagnetic block can be at two
Between solenoid up and down；The two-way driving current signal that drive circuit sends is respectively connecting to two solenoids, and two
Road drives current cycle cycle alternation to occur, makes electric current in two solenoids replace break-make, thus drives metal slide bar upper and lower
Move back and forth；
Striking head, is fixedly connected on the metal slide bar end of electromagnetic hammer, repeatedly taps measured object, measured object with metal slide bar
Deforming upon and produce resilience force under the active force of striking head, striking head is internal containing piezoelectric transducer, and piezoelectric transducer is examined
Survey time elastic force, is converted into resilience force knocking and exports modulate circuit.
The multichannel of a kind of adhesive bonding of composites structure the most according to claim 1 taps detection device, it is characterised in that:
Described drive circuit includes first input port, the second input port, two resistance R1 and R2, two audion Q1 and Q2, the
One input port and the second input port connect respectively one end of resistance R1 and R2, resistance R1 and the R2 other end connect respectively Q1 and
The base stage of Q2, the colelctor electrode of Q1 and Q2 connect respectively the first solenoid L1 in electromagnetic hammer and the second solenoid L2, Q1 and
The equal ground connection of emitter stage of Q2.
The multichannel of a kind of adhesive bonding of composites structure the most according to claim 1 taps detection device, it is characterised in that
Described modulate circuit includes operational amplifier INA118, comparator LM393, resistance R1, R2, R3, R4, R5, electric capacity C1；
The differential input end of operational amplifier INA118 is the input of modulate circuit, is pulled up by resistance R1, resistance R2 respectively
To datum, negative power supply end ground connection, positive electrical source connects power supply, and input reference edge connects datum, computing
The outfan of amplifier connects one end of R4, and the other end of R4 is divided into two-way, and a road connects another termination of electric capacity C1, electric capacity C1
Ground, another road is connected to the electrode input end of comparator LM393 as the output of signal；The negative input of comparator LM393
Connecting datum, negative power supply end ground connection, cathode power supply termination power supply, the outfan of comparator is the defeated of modulate circuit
Go out, be pulled to power supply by resistor R5.
The multichannel of a kind of adhesive bonding of composites structure the most according to claim 1 taps detection device, it is characterised in that:
Described striking head uses by the material package of resin with conductive metal powder solidification.
The multichannel of a kind of adhesive bonding of composites structure the most according to claim 4 taps detection device, its feature exists
In: described conductive metal powder is tungsten powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610499896.1A CN106198728B (en) | 2016-06-29 | 2016-06-29 | A kind of multichannel percussion detection device of adhesive bonding of composites structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610499896.1A CN106198728B (en) | 2016-06-29 | 2016-06-29 | A kind of multichannel percussion detection device of adhesive bonding of composites structure |
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| Publication Number | Publication Date |
|---|---|
| CN106198728A true CN106198728A (en) | 2016-12-07 |
| CN106198728B CN106198728B (en) | 2019-01-25 |
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ID=57462672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610499896.1A Active CN106198728B (en) | 2016-06-29 | 2016-06-29 | A kind of multichannel percussion detection device of adhesive bonding of composites structure |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109580780A (en) * | 2018-12-14 | 2019-04-05 | 天津工业大学 | Hand-held taps detector and detection method |
| CN110632173A (en) * | 2018-06-22 | 2019-12-31 | 杨宗智 | Knocking detection device |
| CN113655120A (en) * | 2021-08-19 | 2021-11-16 | 上海建工集团股份有限公司 | Automatic knocking device and method for nondestructive testing |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110632173A (en) * | 2018-06-22 | 2019-12-31 | 杨宗智 | Knocking detection device |
| CN109580780A (en) * | 2018-12-14 | 2019-04-05 | 天津工业大学 | Hand-held taps detector and detection method |
| CN113655120A (en) * | 2021-08-19 | 2021-11-16 | 上海建工集团股份有限公司 | Automatic knocking device and method for nondestructive testing |
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|---|---|
| CN106198728B (en) | 2019-01-25 |
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