CN109342574A - A kind of sound emission multichannel fast switching system and switching method - Google Patents
A kind of sound emission multichannel fast switching system and switching method Download PDFInfo
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- CN109342574A CN109342574A CN201811462119.5A CN201811462119A CN109342574A CN 109342574 A CN109342574 A CN 109342574A CN 201811462119 A CN201811462119 A CN 201811462119A CN 109342574 A CN109342574 A CN 109342574A
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000005086 pumping Methods 0.000 claims description 21
- 230000005284 excitation Effects 0.000 claims description 11
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 5
- 238000002955 isolation Methods 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000011664 signaling Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 8
- 238000012360 testing method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000009659 non-destructive testing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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
- G01N29/14—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 using acoustic emission techniques
-
- 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
- G01N29/24—Probes
- G01N29/2437—Piezoelectric probes
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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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- 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
- G01N29/36—Detecting the response signal, e.g. electronic circuits specially adapted therefor
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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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- 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
- G01N2291/028—Material parameters
- G01N2291/0289—Internal structure, e.g. defects, grain size, texture
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- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The invention discloses a kind of sound emission multichannel fast switching system and switching methods: the system includes even number piezoelectric patches interface, each piezoelectric patches interface is electrically connected with two relays being cascaded respectively, in two relays, two contacts of the relay being directly electrically connected with piezoelectric patches interface are electrically connected with another relay and a total relay respectively, connect the contact being electrically connected with total relay in low level, and two contacts of another relay are grounded respectively and are electrically connected with a data acquisition interface.Sound emission multichannel fast switching system disclosed in this invention can not only make piezoelectric patches interface motivate, acquire switching flexibly stable between both operating modes, moreover it is possible to the quantity of acquisition channel needed for reducing.Temporary idle piezoelectric patches interface and total relay ground connection, to guarantee that the crosstalk signal wherein generated can quickly be inhibited.
Description
Technical field
The invention belongs to field of non destructive testing, in particular to one of field sound emission multichannel fast switching system
And switching method.
Background technique
Piezoelectric effect and inverse piezoelectric effect based on piezoelectric patches, piezoelectric patches both can be used as exciting element motivated or
It can be used as sensor and carry out signal acquisition.When piezoelectric patches works as exciting element, need to be connected to signal generation apparatus；
When piezoelectric patches is as working sensor, need to be connected to acquisition module.If all key nodes to equipment carry out main quilt
Dynamic damage check, needs to arrange a large amount of sensor, right if carrying out data acquisition to a piezoelectric patches by an acquisition channel
The acquisition channel quantity requirement with higher of acquisition module, and the acquisition module price of multiplexer channel is often sufficiently expensive.
Summary of the invention
Multiple piezoelectric patches can be made to acquisition channel time-sharing multiplex the technical problem to be solved by the invention is to provide a kind of
Sound emission multichannel fast switching system and switching method.
The present invention adopts the following technical scheme:
A kind of sound emission multichannel fast switching system, thes improvement is that: the system includes that even number piezoelectric patches connects
Mouthful, each piezoelectric patches interface is electrically connected with two relays being cascaded respectively, in two relays, directly and piezoelectric patches
Two contacts of the relay of interface electrical connection are electrically connected, with another relay and a total relay in low level respectively
Connect the contact that is electrically connected with total relay, two contacts of another relay be grounded respectively and with a data acquisition interface
Electrical connection, the contact being electrically connected with data acquisition interface is connected in low level, and two piezoelectric patches interfaces form one group, share one
A total relay and a data acquisition interface, in two contacts of each total relay, a ground connection, another then with one
The contact being electrically connected with pumping signal interface is connected in the electrical connection of pumping signal interface in low level, and the system further includes
Control the control module of each relay contact folding and the power module for system power supply.
Further, the quantity of the piezoelectric patches interface is 16, and the quantity of data acquisition interface is 8.
Further, the contact folding of each relay is controlled by optical coupling isolation circuit.
Further, the pumping signal interface is SMA interface.
Further, the power module uses low ripple circuit design, including the power supply of 12V DC electricity and 220V to hand over
Galvanic electricity power supply two ways, 220V AC power supply are completed power supply by power voltage step down module and are converted.
Further, the form of power module power supply interface includes but is not limited to binding post interface and USB interface.
Further, the system further includes a pumping signal sync cap, and the folding of the interface is by control module
It is controlled by an independent relay.
A kind of sound emission multichannel fast switch over method, using above-mentioned system, it is improved in that including following step
It is rapid:
(1) port numbers and bit rate that the host computer of instruction is sent to system control module serial port setting: are set；
(2) model selection: under Passive Mode, each channel of data collecting instrument is electric with each data acquisition interface in system respectively
Connection composition acquisition channel, such system have several data acquisition interfaces just to constitute several acquisition channels；Under aggressive mode, remove
Outside including the content under above-mentioned Passive Mode, signal generator is also electrically connected to composition one with the pumping signal interface in system
A excitation channel；
(3) when working in aggressive mode, also the pumping signal sync cap in system can be electrically connected group with signal generator
At direct channel, for recording the generation time of pumping signal；
(4) control module makes each piezoelectric patches interface be acquired or motivate by controlling the folding of each relay contact, passive
Under mode, every two piezoelectric patches interface shares an acquisition channel, to realize to the time-sharing multiplex of same acquisition channel, works as use
When one of piezoelectric patches interface is acquired, another temporary idle piezoelectric patches interfacing ground；In the active mode, in addition to
Outside including the content under above-mentioned Passive Mode, all total relays share an excitation channel, work in the piezoelectricity of incentive mode
Piece interface is electrically connected with excitation channel, and temporary idle piezoelectric patches interfacing ground allows piezoelectric patches interface neither to acquire nor swash
It encourages；Each piezoelectric patches interface mutual cooperation is acquired and/or motivates at line style, round or square type array.
The beneficial effects of the present invention are:
Sound emission multichannel fast switching system disclosed in this invention, can not only make piezoelectric patches interface motivate, acquire this two
Switching flexibly stable between kind operating mode, moreover it is possible to the quantity of acquisition channel needed for reducing.Temporary idle piezoelectric patches interface
And total relay ground connection makes to press to guarantee that the crosstalk signal wherein generated can quickly be inhibited after avoiding crosstalk signal from generating
Electric piece generates vibration under inverse piezoelectric effect effect, which will increase the guided wave complexity in structure, generates to Guided waves
Interference.
Sound emission multichannel fast switching system disclosed in this invention, power module use low ripple circuit design, can
Be effectively reduced input voltage it is unstable when the influence caused by system, while effectively inhibit surge current.The touching of each relay
Point folding is controlled by optical coupling isolation circuit, can be avoided the transient high-current poured in some special cases or wink
When high voltage system is damaged.
Sound emission multichannel fast switch over method disclosed in this invention can make each piezoelectric patches interface cooperate into line
Type, round or square type array are acquired and/or motivate, so that the certain features for arriving test specimen be accurately positioned, make non-destructive testing
As a result even more ideal.
Detailed description of the invention
Fig. 1 is the composition block diagram of system disclosed in the embodiment of the present invention 1；
Fig. 2 is the schematic illustration that system disclosed in the embodiment of the present invention 1 carries out multichannel switching；
Fig. 3 is the circuit connection diagram of optical coupling isolation circuit in system disclosed in the embodiment of the present invention 1；
Fig. 4 is the circuit connection diagram of power module in system disclosed in the embodiment of the present invention 1；
Fig. 5 is the flow diagram of switching method disclosed in the embodiment of the present invention 1.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, right below in conjunction with drawings and examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
When carrying out active guided wave and passive Guided waves to structure, piezoelectric effect and inverse pressure of the basic principle for piezoelectric patches
Electrical effect.Piezoelectric patches is placed on test specimen to be measured, converts electrical signals to mechanical signal using the piezoelectric effect of piezoelectric patches, from
And generate weak vibration and propagated forward on test specimen in wavy, other piezoelectric patches on test specimen to be measured are capturing vibration signal
After be translated into electric signal (inverse piezoelectric effect) and be transmitted to acquisition equipment.In the detection process, to the same piezoelectric patches,
After exciting element work, it will may work at once as acquisition elements, each piezoelectric patches on test specimen to be measured will be electrically connected
It is connected on each piezoelectric patches interface of system disclosed in the present embodiment, that is, can guarantee that piezoelectric patches can be under different working modes
Flexible conversion.
Embodiment 1, it is as shown in Figs. 1-2, described present embodiment discloses a kind of sound emission multichannel fast switching system
System includes 16 piezoelectric patches interfaces 1, and each piezoelectric patches interface is electrically connected with two relays being cascaded respectively, at two
In relay, two contacts of the relay being directly electrically connected with piezoelectric patches interface respectively with another relay and one always after
The contact being electrically connected with total relay is connected in electric appliance electrical connection in low level, and two contacts of another relay connect respectively
It ground and is electrically connected with a data acquisition interface 2, the contact being electrically connected with data acquisition interface is connected in low level, two are pressed
Electric piece interface forms one group, shares a total relay and a data acquisition interface, thus a total of 8 total relays with
8 data acquisition interfaces, in two contacts of each total relay, a ground connection, another then with a pumping signal interface 3
The contact being electrically connected with pumping signal interface is connected in electrical connection in low level, and the system further includes controlling each relay
The control module 4 that contact opens and closes and the power module 5 for system power supply.
As shown in figure 3, the contact folding of each relay is controlled by optical coupling isolation circuit.The pumping signal connects
Mouth is SMA interface.
As shown in figure 4, the power module uses low ripple circuit design, including the power supply of 12V DC electricity and 220V
AC power supply two ways, 220V AC power supply are completed power supply by power voltage step down module and are converted.Power module power supply interface
Form include but is not limited to binding post interface and USB interface.
The system further includes a pumping signal sync cap 6, and the folding of the interface passes through one by control module
Independent relay is controlled.The sum that this sample embodiment relays electric appliance 7 is 41, including 8 total relays, 16 pressures
Electric corresponding 32 relays of piece interface and the separate relay of 1 control pumping signal sync cap folding.
As shown in figure 5, the present embodiment also discloses a kind of sound emission multichannel fast switch over method, it is using above-mentioned
System, includes the following steps:
(1) port numbers and bit rate that the host computer of instruction is sent to system control module serial port setting: are set；
(2) model selection: under Passive Mode, each channel of data collecting instrument is electric with each data acquisition interface in system respectively
Connection composition acquisition channel, such system constitute 8 acquisition channels；Under aggressive mode, in addition to including under above-mentioned Passive Mode
Content outside, signal generator is also electrically connected with the pumping signal interface in system to 1 excitation channel of composition；
(3) when working in aggressive mode, also the pumping signal sync cap in system can be electrically connected group with signal generator
At direct channel, for recording the generation time of pumping signal；
(4) control module makes each piezoelectric patches interface be acquired or motivate by controlling the folding of each relay contact, such as wants
It is acquired the piezoelectric patches interface of piezoelectric patches 1 in Fig. 2, then needs to acquire to relay 2 with low level to connect it with data
The contact of interface electrical connection；The piezoelectric patches interface of piezoelectric patches 16 in Fig. 2 is motivated, then is needed to relay 40 with low level
To connect the contact that it is electrically connected with total relay 36, also need to believe to total relay 36 with low level to connect it with excitation
The contact of number interface electrical connection.In the passive mode, every two piezoelectric patches interface shares an acquisition channel, to realize to same
The time-sharing multiplex of acquisition channel, when being acquired using one of piezoelectric patches interface, another temporary idle piezoelectric patches
Interfacing ground；In the active mode, other than including the content under above-mentioned Passive Mode, all total relays share an excitation
Channel, the piezoelectric patches interface for working in incentive mode are electrically connected with excitation channel, and temporary idle piezoelectric patches interfacing ground allows
Piezoelectric patches interface is neither acquired nor is motivated；Each piezoelectric patches interface mutual cooperation is adopted at line style, round or square type array
Collection and/or excitation.
Claims (8)
1. a kind of sound emission multichannel fast switching system, it is characterised in that: the system includes even number piezoelectric patches interface,
Each piezoelectric patches interface is electrically connected with two relays being cascaded respectively, in two relays, is directly connect with piezoelectric patches
Two contacts of the relay of mouth electrical connection are electrically connected with another relay and a total relay respectively, connect in low level
The logical contact being electrically connected with total relay, two contacts of another relay be grounded respectively and with a data acquisition interface electricity
Connection, the contact being electrically connected with data acquisition interface is connected in low level, and two piezoelectric patches interfaces form one group, share one
Total relay and a data acquisition interface, in two contacts of each total relay, a ground connection, another then swashs with one
It encourages signaling interface electrical connection, connect the contact being electrically connected with pumping signal interface in low level, the system further includes control
Make the control module of each relay contact folding and the power module for system power supply.
2. sound emission multichannel fast switching system according to claim 1, it is characterised in that: the piezoelectric patches interface
Quantity is 16, and the quantity of data acquisition interface is 8.
3. sound emission multichannel fast switching system according to claim 1, it is characterised in that: open the contact of each relay
Conjunction is controlled by optical coupling isolation circuit.
4. sound emission multichannel fast switching system according to claim 1, it is characterised in that: the pumping signal connects
Mouth is SMA interface.
5. sound emission multichannel fast switching system according to claim 1, it is characterised in that: the power module is adopted
With low ripple circuit design, including the power supply of 12V DC electricity and 220V AC power supply two ways, 220V AC power supply by
Power voltage step down module completes power supply conversion.
6. sound emission multichannel fast switching system according to claim 5, it is characterised in that: power module power supply interface
Form include but is not limited to binding post interface and USB interface.
7. sound emission multichannel fast switching system according to claim 1, it is characterised in that: the system further includes
The folding of one pumping signal sync cap, the interface is controlled by control module by an independent relay.
8. a kind of sound emission multichannel fast switch over method, uses system as claimed in claim 7, which is characterized in that including such as
Lower step:
(1) port numbers and bit rate that the host computer of instruction is sent to system control module serial port setting: are set；
(2) model selection: under Passive Mode, each channel of data collecting instrument is electric with each data acquisition interface in system respectively
Connection composition acquisition channel, such system have several data acquisition interfaces just to constitute several acquisition channels；Under aggressive mode, remove
Outside including the content under above-mentioned Passive Mode, signal generator is also electrically connected to composition one with the pumping signal interface in system
A excitation channel；
(3) when working in aggressive mode, also the pumping signal sync cap in system can be electrically connected group with signal generator
At direct channel, for recording the generation time of pumping signal；
(4) control module makes each piezoelectric patches interface be acquired or motivate by controlling the folding of each relay contact, passive
Under mode, every two piezoelectric patches interface shares an acquisition channel, to realize to the time-sharing multiplex of same acquisition channel, works as use
When one of piezoelectric patches interface is acquired, another temporary idle piezoelectric patches interfacing ground；In the active mode, in addition to
Outside including the content under above-mentioned Passive Mode, all total relays share an excitation channel, work in the piezoelectricity of incentive mode
Piece interface is electrically connected with excitation channel, and temporary idle piezoelectric patches interfacing ground allows piezoelectric patches interface neither to acquire nor swash
It encourages；Each piezoelectric patches interface mutual cooperation is acquired and/or motivates at line style, round or square type array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811462119.5A CN109342574B (en) | 2018-12-03 | 2018-12-03 | Acoustic emission multichannel rapid switching system and switching method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811462119.5A CN109342574B (en) | 2018-12-03 | 2018-12-03 | Acoustic emission multichannel rapid switching system and switching method |
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| Publication Number | Publication Date |
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| CN109342574A true CN109342574A (en) | 2019-02-15 |
| CN109342574B CN109342574B (en) | 2024-02-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110988125A (en) * | 2019-12-16 | 2020-04-10 | 厦门大学 | Active ultrasonic guided wave device |
| CN112206003A (en) * | 2019-07-11 | 2021-01-12 | 深圳市理邦精密仪器股份有限公司 | Multi-probe ultrasonic instrument and cascade structure of socket thereof |
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| DE19860127C1 (en) * | 1998-12-17 | 2000-10-26 | Mannesmann Ag | Ultrasonic testing head for non-destructive materials testing uses individual piezoelectric elements coupled in pairs to common input channels with summation of their output signals for each output channel |
| CN1595183A (en) * | 2003-09-09 | 2005-03-16 | 华为技术有限公司 | Test circuit and test method thereof |
| CN201449411U (en) * | 2009-07-02 | 2010-05-05 | 苏州经贸职业技术学院 | Multichannel current sampling circuit |
| CN101872194A (en) * | 2010-06-30 | 2010-10-27 | 南京航空航天大学 | Low-crosstalk, rapid and active-passive compatible type piezoelectric channel switching system and realization method thereof |
| CN103425107A (en) * | 2013-08-13 | 2013-12-04 | 南京航空航天大学 | Multiple piezoelectric channel program-controlled switching system |
| CN203883859U (en) * | 2014-05-30 | 2014-10-15 | 国家电网公司 | Multi-gate attenuation network system based on relay array |
| CN209231276U (en) * | 2018-12-03 | 2019-08-09 | 中国海洋大学 | A kind of sound emission multichannel fast switching system |
-
2018
- 2018-12-03 CN CN201811462119.5A patent/CN109342574B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19860127C1 (en) * | 1998-12-17 | 2000-10-26 | Mannesmann Ag | Ultrasonic testing head for non-destructive materials testing uses individual piezoelectric elements coupled in pairs to common input channels with summation of their output signals for each output channel |
| CN1595183A (en) * | 2003-09-09 | 2005-03-16 | 华为技术有限公司 | Test circuit and test method thereof |
| CN201449411U (en) * | 2009-07-02 | 2010-05-05 | 苏州经贸职业技术学院 | Multichannel current sampling circuit |
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| CN203883859U (en) * | 2014-05-30 | 2014-10-15 | 国家电网公司 | Multi-gate attenuation network system based on relay array |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112206003A (en) * | 2019-07-11 | 2021-01-12 | 深圳市理邦精密仪器股份有限公司 | Multi-probe ultrasonic instrument and cascade structure of socket thereof |
| CN110988125A (en) * | 2019-12-16 | 2020-04-10 | 厦门大学 | Active ultrasonic guided wave device |
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| CN109342574B (en) | 2024-02-06 |
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