CN201387385Y - Integration piezoelectricity multi-channel scanning structural health monitoring system based on computer bus - Google Patents
Integration piezoelectricity multi-channel scanning structural health monitoring system based on computer bus Download PDFInfo
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Abstract
The utility model discloses an integration piezoelectricity multi-channel scanning structural health monitoring system based on a computer bus, comprising a system power supply, a system bus back plate, a system controller card, a touch screen, a random waveform generation card, a high-speed data acquisition card, a high-frequency power amplifier card, a program control gain charge amplifier card and a sensor multi-channel switching card; except the system power supply, the touch screen and all the cards are connected on the unified computer system bus back plate, and all the cards and the system controller card are communicated by the computer bus, the touch screen is communicated with the system controller card by a display interface of the system controller card. The system can carry out multi-channel scanning to piezoelectric-exciting-sensing network, and performs on-line structural health monitoring to a large engineering structure; the system has small volume, high integration degree, compact structure and convenient usage; the system is provided with the unified integration software system, can automatically extract damage characteristics of a common structure and distinguish the damage; the operation is convenient and the system on-line monitoring property is good.
Description
Technical field
The utility model relates to a kind of structural healthy monitoring system, relates in particular to a kind ofly based on computer bus, is used to control the hyperchannel scanning integrated system of piezoelectric excitation sensing network implementation structure health monitoring.
Background technology
Structural health monitoring technology is the new ideas that adopt the intellectual material structure, utilization is integrated in the advanced sensing/driving element network in the structure, obtain to online in real time the information relevant (as stress with the structural health situation, strain, temperature, mode of oscillation, wave propagation characteristic etc.), in conjunction with advanced signal message disposal route and material structure mechanical modeling method, extract the structural damage characteristic parameter, the state of recognition structure, comprise damage, and to the unsafe factor of structure, just controlled in early days at it to eliminate safe hidden trouble or to control further developing of potential safety hazard, thereby the healthy self diagnosis of implementation structure guarantees that the safety and health of structure hangs down the maintenance expense.
Structure health monitoring method based on the active monitoring technology is a kind of typical, effective hot research method.This method is generally at first carried out the active excitation to structure by the driver of imbedding structure (as piezoelectric element), in structure, excite elastic wave or make structure be in the slight vibration state, use the transducing signal of single or multiple sensors (as piezoelectric element) perceptual structure diverse location simultaneously, damage in the structure can cause the change of transducing signal, change in view of the above and can differentiate, obtain configuration state information the damage in the structure.Existing in the world lot of documents report is based on the progress of the structure health monitoring method of active monitoring technology, and these studies show that the method is effective, has important application prospects.
At present, be an instrument system that comprises a plurality of independent instrument of building based on the employed instrument of the structure health monitoring method of active monitoring technology by a plurality of dispersion independent instrument.The independent instrument that this instrument system comprises has: Arbitrary Waveform Generator (function generator), and wideband power amplifer, charge amplifier is based on the computer data acquisition system or the oscillograph of data collecting card.These independently instrument and equipment use different software to carry out work, this just feasible instrument system software disunity that constitutes by them, the user uses very inconvenience, must carry out manual adjustment to each instrument, and this instrument system is because independent instrument causes much that hardware weight is big, line is many, make that equally the user uses inconvenience, such instrument system is not suitable for the needs of practical engineering application.For example: the health monitoring of Flight Vehicle Structure is the key areas that structural health monitoring technology is used at present, and the health monitoring systems that is applied to Flight Vehicle Structure is must volume little, in light weight, be easy to carry and install, make things convenient for the aircraft maintainers to use; In the health monitoring to civil structure, health monitoring pulpit size is limited, and also has some other watch-dog, so same claimed structure health monitoring systems volume is little, is convenient to operation.For these requirements, existing instrument system can't arrive.Therefore press for that development integrated level height, volume are little, in light weight, the structural health prison system of portable band.
Along with the structural health monitoring technology through engineering approaches use growing, the structural area of the required monitoring of monitoring structural health conditions progressively increases, piezoelectric element more is to use with excitation-sensing network array format.Existing instrument system is very inconvenience in the switching of piezoelectric excitation-each passage of sensing network array.This moment is at piezoelectric excitation-sensing network, becomes most important based on the realization of the integrated piezoelectric hyperchannel scanning structural healthy monitoring system of computer bus.
Summary of the invention
1, technical matters: the technical problems to be solved in the utility model provides a kind of based on computer bus, miniaturization, integrated, be suitable for the structural healthy monitoring system that engineering is used, be used to control excitation-sensing network of forming by piezoelectric element structure is carried out online health monitoring work.
2, technical scheme: in order to solve above-mentioned technical matters, integrated piezoelectric hyperchannel scanning structural healthy monitoring system based on computer bus of the present utility model comprises that system power supply, system bus backboard, system controller card, touch-screen, random waveform produce card, high-speed data acquisition card, high frequency power amplifier card, programme-controlled gain charge amplifier card, sensor multi-channel switching card.
Described system power supply, system bus backboard, system controller card, touch-screen, random waveform generation card, high-speed data acquisition card, high frequency power amplifier card, programme-controlled gain charge amplifier card, sensor multi-channel switching card, integrated software are integrated in the computing machine integral aluminum alloy heat-dissipating casing that can prevent electromagnetic interference (EMI).
Except that system power supply, touch-screen and each integrated circuit board are connected on the unified computer system bus backboard, carry out communication by bus between each integrated circuit board and the system controller card, and touch-screen directly passes through display interface device and its communication of system controller card.
System controller card is sent to random waveform generation card with the pumping signal of digital quantity form by bus, random waveform generation cartoon is crossed the D/A conversion and is exported pumping signal to the high frequency power amplifier card with the analog quantity form, transfer to the sensor multi-channel switching card behind the power ascension of high frequency power amplifier card with pumping signal, the sensor multi-channel switching card is input to pumping signal excitation piezoelectric element selected in extraneous piezoelectric excitation-sensing network again; The transducing signal of the analog quantity form that selected sensing piezoelectric element produces in extraneous piezoelectric excitation-sensing network transfers to programme-controlled gain charge amplifier by the sensor multi-channel switching card and sticks into the row amplification, and the transducing signal after the amplification transfers to system controller card again after high-speed data acquisition card is converted into digital quantity by A/D; The channel control signals that system controller card produces is sent to the sensor multi-channel switching card by bus, controls it and carries out the passage switching, monitors the passage switching state of this card simultaneously; The enlargement factor control signal that system controller card produces is sent to its enlargement factor of programme-controlled gain charge amplifier card control and sensitivity by bus, monitors the state of a control of this card simultaneously.
System controller card is actually a computer system motherboard card, and it has comprised basic modules such as basic CPU, internal memory, hard disk, display control.System controller card and system bus backboard combine provides unified computer bus platform for random waveform produces card, high-speed data acquisition card, programme-controlled gain charge amplifier card and sensor multi-channel switching card.The function of system controller card is to handle all system and application software, sends the steering order to all hardware, and handles all data results.
The function that random waveform produces card is the multiple pumping signal that produces in the initiating structure health monitoring, it can produce arrowband Lamb ripple, broadband Lamb ripple and sinusoidal wave-wave, square wave or the like pumping signal commonly used, also can programme and produce various special pumping signals according to the needs of actual monitoring, the signal frequency range broad of its generation, it can be signal from DC to 5MHz cline frequency scope, signal amplitude can from 0 to ± 10V is adjustable continuously, and possess the output filter function, it is higher to produce the voltage of signals precision.
The power supply that provides on the bus only is provided the high frequency power amplifier card, does not accept the control of controller card.Its function is to improve the power that is produced the pumping signal of card by random waveform, because the actual monitoring structural area is big, the pumping signal that is produced card by random waveform need could be imported piezoelectric excitation-sensing network through high frequency power amplifier card raising pumping signal power.The bandwidth of operation of high frequency power amplifier card can reach 500KHz's-three dB bandwidth, and output voltage is up to ± 70V.
The sensor multi-channel switching card is the function that realizes the hyperchannel scanning, for use in the large tracts of land monitoring structural health conditions piezoelectricity swash-sensing network provides stable and accurate passage handoff functionality.He receives the high-frequency high-power pumping signal of high frequency power amplifier card output, flow to selected exciting element, and receive the transducing signal of selected sensing element, export to the programme-controlled gain charge amplifier card, apply and being captured in of transducing signal of pumping signal have obtained effective control in this module.
The function of programme-controlled gain charge amplifier card is the transducing signal of amplification piezoelectric excitation-sensing network.Its enlargement factor and sensitivity can be adjusted by program according to the needs of actual monitoring; Its bandwidth of operation is that 15KHz is to 500KHz.
The function of high-speed data acquisition card is that the transducing signal to excitation-sensing network of being made up of piezoelectric element carries out high speed data signal acquiring.Its sampling rate can arrive 60MHz, and possesses four tunnel while acquisition functions.Its high-speed, high precision performance has guaranteed the precision of transducing signal, thereby has improved accuracy and real-time that damage is differentiated.
System power supply, system bus backboard, system controller card, random waveform generation card, high-speed data acquisition card, high frequency power amplifier card, programme-controlled gain charge amplifier card and sensor multi-channel switching card piece are integrated in computing machine and can prevent in the integral aluminum alloy heat-dissipating casing of electromagnetic interference (EMI).Utilize the encapsulation of this integral heat sink formula aluminium alloy cabinet, can realize that stable, integrated level height, volume are little, in light weight, the integrated piezoelectric hyperchannel scanning structural healthy monitoring system of portable band.
The integral aluminum alloy heat-dissipating casing is embedded with the system user operation interface (touch-screen display) of band touch screen function, this system user operation interface directly is connected communication with system controller card by System Backplane, is beneficial to operation and the control of user to native system.
The integrated software that native system uses comprises three modules: software and hardware administration module, signal characteristic extraction module and damage module.
3, beneficial effect: the integrated piezoelectric hyperchannel scanning structural healthy monitoring system based on computer bus of the present utility model can carry out the hyperchannel scanning to piezoelectric excitation-sensing network easily, be convenient to large aerospace space structure, civil structure are realized online monitoring structural health conditions: (1) native system provides efficient, stable passage switches, and is convenient to realize with piezoelectric excitation-sensing network structure being carried out large-scale health monitoring; (2) native system stable performance, volume is little, integrated level is high, and compact conformation is easy to use; (3) native system has unified integrated software systems, can extract common structural damage feature automatically, and damage is differentiated; (4) have easy to operate, use user interface flexibly, also can dispose very easily, expansion structure health monitoring software and hardware; (5) system has online long term monitoring ability, helps promoting the practical application of initiating structure health monitoring technology in engineering.
Description of drawings
Fig. 1 is an one-piece construction synoptic diagram of the present utility model;
Fig. 2 is high frequency power amplifier card one-piece construction figure of the present utility model;
Fig. 3 is the existing schematic diagram of the real module of high frequency power amplifier card power supply of the present utility model;
Fig. 4 is that high frequency power amplifier card signal power amplifier module of the present utility model is realized schematic diagram;
Fig. 5 is programme-controlled gain charge amplifier card one-piece construction figure of the present utility model;
Fig. 6 is that programme-controlled gain charge amplifier card bus communication module of the present utility model is realized schematic diagram;
Fig. 7 is that programme-controlled gain charge amplifier card signal amplification module of the present utility model is realized schematic diagram;
Fig. 8 is sensor multi-channel switching card one-piece construction figure of the present utility model;
Fig. 9 is that sensor multi-channel switching card bus communication module of the present utility model is realized schematic diagram;
Figure 10 is that sensor multi-channel switching card channel switching module of the present utility model realizes schematic diagram;
Figure 11 is a software configuration synoptic diagram of the present utility model;
Figure 12 is the process flow diagram of system works of the present utility model.
Embodiment
As shown in Figure 1, present embodiment based on PXI (PCI eXtension for Instrumentation, PCI is in the expansion of instrument field; PCI is a peripheral component interconnection, full name Peripheral Component Interconnection) the integrated piezoelectric hyperchannel scanning structural healthy monitoring system of bus, comprise system power supply and system bus backboard, its system bus backboard is provided with system controller card, touch-screen, random waveform generation card, high-speed data acquisition card, high frequency power amplifier card, programme-controlled gain charge amplifier card, sensor multi-channel switching card, and carry out communication by the PXI bus, also comprise integrated piezoelectric hyperchannel scanning structural healthy monitoring system software in addition.
System controller card is sent to random waveform generation card with the pumping signal of digital quantity form by bus.Described system controller card is actually a computer system motherboard card, and it has comprised basic modules such as basic CPU, internal memory, hard disk, display control.System controller card and system bus backboard combine provides unified computer bus platform for random waveform produces card, high-speed data acquisition card, programme-controlled gain charge amplifier card and sensor multi-channel switching card.The function of system controller card is to handle all system and application software, sends the steering order to all hardware, and handles all data results.
Random waveform produces in the card and changes (digital-to-analog conversion) by D/A, exports pumping signal to the high frequency power amplifier card with the analog quantity form.The function that described random waveform produces card is the multiple pumping signal that produces in the initiating structure health monitoring, it can produce arrowband Lamb ripple, broadband Lamb ripple and sinusoidal wave-wave, square wave or the like pumping signal commonly used, also can programme and produce various special pumping signals according to the needs of actual monitoring, the signal frequency range broad of its generation, it can be signal from DC to 5MHz cline frequency scope, signal amplitude can from 0 to ± 10V is adjustable continuously, and possess the output filter function, it is higher to produce the voltage of signals precision.
Transfer to the sensor multi-channel switching card behind the power ascension of high frequency power amplifier card with pumping signal.The power supply that provides on the bus only is provided described high frequency power amplifier card, does not accept the control of controller card.Its function is to improve the power that is produced the pumping signal of card by random waveform, because the actual monitoring structural area is big, the pumping signal that is produced card by random waveform need could be imported piezoelectric excitation-sensing network through high frequency power amplifier card raising pumping signal power.The bandwidth of operation of high frequency power amplifier card can reach 500KHz's-three dB bandwidth, and output voltage is up to ± 70V.
The excitation piezoelectric element that the sensor multi-channel switching card is input to pumping signal in extraneous piezoelectric excitation-sensing network again is that sensor array sticks on the monitored structure, wherein, per two sensors in the sensor array can constitute an excitation-sensing passage, and a plurality of sensors just can constitute a plurality of excitations-sensing passage and form excitation-sensing network.Described sensor multi-channel switching card is the function that realizes the hyperchannel scanning, for use in the large tracts of land monitoring structural health conditions piezoelectricity swash-sensing network provides stable and accurate passage handoff functionality.He receives the high-frequency high-power pumping signal of high frequency power amplifier card output, flow to selected exciting element, and receive the transducing signal of selected sensing element, export to the programme-controlled gain charge amplifier card, apply and being captured in of transducing signal of pumping signal have obtained effective control in this module.
The response signal of the analog quantity form that the sensing piezoelectric element in extraneous piezoelectric excitation-sensing network produces transfers to programme-controlled gain charge amplifier by the sensor multi-channel switching card and sticks into row and amplify, and the transducing signal after the amplification transfers to system controller card become digital quantity by A/D conversion (analog to digital conversion) in high-speed data acquisition card after again.The function of described high-speed data acquisition card is that the transducing signal to excitation-sensing network of being made up of piezoelectric element carries out high speed data signal acquiring.Its sampling rate can arrive 60MHz, and possesses four tunnel while acquisition functions.Its high-speed, high precision performance has guaranteed the precision of transducing signal, thereby has improved accuracy and real-time that damage is differentiated.
The channel control signals that system controller card produces is sent to the sensor multi-channel switching card by bus, controls it and carries out the passage switching, monitors the passage switching state of this card simultaneously; The enlargement factor control signal that system controller card produces is sent to its enlargement factor of programme-controlled gain charge amplifier card control and sensitivity by bus, monitors the state of a control of this card simultaneously.The function of described programme-controlled gain charge amplifier card is the transducing signal of amplification piezoelectric excitation-sensing network.Its enlargement factor and sensitivity can be adjusted by program according to the needs of actual monitoring; Its bandwidth of operation is that 15KHz is to 500KHz.
The sample frequency of signal output amplitude, clock turnover rate and the high-speed data acquisition card of random waveform generation card, sampling range, sampling length, trigger mode and level are subjected to the control of system controller card; Touch-screen is direct and system controller card communication by the system bus backboard, and it is mutual to the task between the system controller card to finish user control command.
In the present embodiment, system power supply, system bus backboard, system controller card, touch-screen, random waveform produce card, high-speed data acquisition card, high frequency power amplifier card, programme-controlled gain charge amplifier card, sensor multi-channel switching card, and that all unifies is integrated in the monoblock type PXI aluminium alloy heat-dissipating casing that can prevent electromagnetic interference (EMI).The PXI cabinet of band touch screen function, system power supply, system bus backboard, system controller card, random waveform produce card, high-speed data acquisition card can be chosen on market according to demand.
As shown in Figure 2, to be divided into two modules be power module and signal power amplification module to the high frequency power amplifier card.As shown in Figure 3, power module promotes supply voltage on the PXI bus, for example with on the PXI bus+the power source conversion one-tenth ± 80V power supply of 12V, and the signal power amplification module powered.As shown in Figure 4, power amplifier module one total two-stage: the first order is a voltage amplifier stage, and the second level is the current boost level.The voltage signal that voltage amplifier stage utilizes the integrated computational calculation power amplifier circuit of high speed random waveform can be produced being no more than of card input ± 10V/20mA is amplified to ± 70V/50mA, the current boost level is carried out voltage follow and is promoted electric current to 500mA, the final output signal maximum voltage/current is ± 70V/500mA that undistorted frequency is the highest can to reach 500KHz.
As shown in Figure 5, to be divided into two modules be bus communication module and signal amplification module to the programme-controlled gain charge amplifier card.As shown in Figure 6, bus communication module carries out alternately with user control program by PXI bus and system controller card, produces sensitivity and enlargement factor program control signal, and the monitoring programmed state.As shown in Figure 7, signal amplification module one total level Four: the first order is the electric charge amplifier stage, and the second level is program control amplifier stage, the high pass active power filtering of holding concurrently, and the third level is a low pass active power filtering level, the 4th utmost point is reverse amplifier stage.
As shown in Figure 8, the sensor multi-channel switching card is divided into two modules: bus communication module and channel switching module.As shown in Figure 9, bus communication module carries out alternately with user control program by PXI bus and system controller card, produces the passage switch-over control signal, and the monitoring channel opening.As shown in figure 10, channel switching module is made up of relay and driving circuit thereof.This module and piezoelectric excitation-sensing network, high frequency power amplifier card, programme-controlled gain charge amplifier card connection.
In the present embodiment, monoblock type PXI aluminium alloy heat-dissipating casing is embedded with the system user operation interface (touch-screen display) of band touch screen function, this system user operation interface directly is connected communication with system controller card by System Backplane, is beneficial to operation and the control of user to native system.
The integrated software structure of realization present embodiment systemic-function as shown in figure 11.Specify as follows:
(1) software master interface: be the main interface of whole integrated software, be used for dynamic call software and hardware administration module, signal characteristic extraction module, damage module.Transducing signal that collects and monitoring report also all here show;
(2) software and hardware administration module comprises:
(a) hardware check: by this module, system obtains the hardware running status, comprises that hardware controls is normal, hardware error and information such as can't discern;
(b) pumping signal output control: this module is used to produce the signal that acts on exciting element, and the output amplitude of setting signal, frequency and count in the interface, and type of waveform comprise key player on a team's ripple, modulating wave etc.;
(c) transducing signal acquisition controlling: this module is used for the signal that sensing element receives is gathered.In module, set sample frequency, sampling number, the triggering collection level carry out data acquisition, gather repeatedly be averaged, basic parameter such as collections in advance, and can select drainage pattern, control preservation acquired signal;
(d) charge amplifier control: this module is used for the signal that sensing element obtains is amplified.By in software, setting corresponding gain and level of sensitivity, the signal magnifying state that control amplifier hardware is in;
(e) hyperchannel scanning control: this module is passed through the scanning work of the switching realization of relay to multiple activation-sensing passage.This module cooperative control signal is gathered, relay switches, electric charge amplifies, the work of pumping signal output module.Carry out scanning according to the excitation in the import system-sensing element tabulation by certain time interval.The data result that scanning obtains is preserved with the form that the user sets;
(f) sensing network management: this module is used for hyperchannel scanning preceding foundation and importing to sensing network (tabulation of excitation-sensing).To encourage sensing element and relay to set up in the module and get in touch, and, derive the excitation-sensing passage that is used for the hyperchannel scanning and define by self-defined or system definition excitation-sensing element is right;
(g) signal inquiry and playback: this module is used to call the data file of preservation, and the playback of signal being carried out selectable modes shows;
(h) telecommunication network control: this module is used for controlling this integrated system by wide area network or LAN (Local Area Network) with an other portable machine;
(i) software error is handled: this module is used for all illegal operations of process user, and the assurance system can not crash;
(j) system uses help document: this module has provided helping prompt and the system maintenance points for attention of using the total system software and hardware with the form of lists of documents.
(3) signal characteristic extraction module comprises:
(a) Huang Shi conversion: this module is used for signal is carried out empirical mode decomposition, extracts intrinsic mode function, and carries out Hilbert and analyze, and obtains Hilbert spectrum, instantaneous frequency, the marginal spectrum energy of each mode function of signal;
(b) time-domain signal analysis: this module is used for energy, amplitude, average, variance, the ringing number of signal calculated;
(c) frequency-region signal analysis: this module is used for signal is carried out power spectrum, the centre frequency of Filtering Processing, signal calculated;
(d) Complex Wavelet Transform: this module is used for calculating signal WAVELET TRANSFORM MODULUS value under the given centre frequency, reaches constantly.
(4) damage module comprises:
Whether (a) phased array imaging: this module utilizes the characteristic parameter of transducing signal array to damage imaging in conjunction with the phased array principle, provide structure and damage, the damage report of degree of injury and damage position;
(b) time overturn imaging: whether this module utilizes the characteristic parameter binding time upset focusing principle of transducing signal array to damage imaging, provide structure and damage, the damage report of type of impairment, degree and damage position;
Above-mentioned signal characteristic extraction and damage diagnosis method can make up with the damage object according to the structure of monitoring and choose.As shown in figure 12, the idiographic flow of the system of present embodiment when work is as follows:
(1) the signal extension line with piezoelectric excitation-sensing network is connected with the sensor multi-channel switching card; Random waveform produces the output terminal of card and links the trigger pip of first acquisition channel of high-speed data acquisition card as signals collecting, and this output terminal is linked the input end of high frequency power amplifier card simultaneously; The output terminal of high frequency power amplifier card is linked the sensor multi-channel switching card; The input end of programme-controlled gain charge amplifier card is linked the sensor multi-channel switching card; The output terminal of programme-controlled gain charge amplifier card is linked second acquisition channel of high-speed data acquisition card;
(2) the start-up system self-check program detects automatically to system's all hardware, if problem (self check by), then provides the position of the hardware of makeing mistakes, prompting customer inspection; If self check is by entering following step;
(3) master of integrated software interface is to be presented on the touch-screen: the hardware controls parameter is set therein; Import excitation-sensing network channel definition; The signalization feature extracting method; Damage diagnosis method is set.The hardware controls parameter mainly comprises: the parameter of the parameter of output drive signal, the parameter of data acquisition, programme-controlled gain charge amplifier, time synchronization information etc.; The definition of excitation-sensing network passage has the sensing network administration module in the integrated software to produce according to user's definition or the user has generated the excitation-sensing network channel definition that finishes before directly importing one;
(4) system controller card send respective software module with each parameter;
(5) pumping signal output control module, transducing signal acquisition module, charge amplifier control module, hyperchannel scanning control module are according to parameter generating control signal corresponding and the data imported into.
(6) system controller card send relevant hardware with control signal and data that above each software module produces;
(7) random waveform produces card according to Wave data output drive signal; The high frequency power amplifier card promotes pumping signal power and send the sensor multi-channel switching card; High-speed data acquisition card is according to acquisition parameter preparation for acquiring transducing signal, and wait piezoelectric excitation-sensing passage is opened; The programme-controlled gain charge amplifier card is according to amplifier control signal control amplifier multiple and sensitivity;
(8) the sensor multi-channel switching card carries out the passage switching;
(9) high-speed data acquisition card begins to gather the transducing signal of sensing piezoelectric element;
(10) judge whether scanning finishes.If do not finish, carry out passage by the sensor multi-channel switching card again and switch, proceed the epicycle scanning.If scanning finishes, system controller card is with sensing data feed signals characteristic extracting module;
(11) signal characteristic extracting methods of setting extracted its characteristic parameter before the signal characteristic extraction module called according to the sensing data that collects;
(12) damage diagnosis method of setting was differentiated the structural damage state and is generated damage report before the damage module was called according to characteristic parameter;
(13) health condition of the monitoring of structures that system can be online, if stop monitoring, system's scanning process out of service then, monitoring finishes, if do not stop just to proceed lower whorl scanning process.
(14) after scanning process stopped, the user can carry out other operation, it is investigated in full and ask and playback, called other signal characteristic extracting methods and did signal Processing, and use other damage diagnosis method to differentiate structural damage or the like.
Claims (3)
1, a kind of integrated piezoelectric hyperchannel scanning structural healthy monitoring system based on computer bus, it is characterized in that, comprise that system power supply, system bus backboard, system controller card, touch-screen, random waveform produce card, high-speed data acquisition card, high frequency power amplifier card, programme-controlled gain charge amplifier card, sensor multi-channel switching card;
Described system controller card is sent to random waveform generation card with the pumping signal of digital quantity form by bus;
Described random waveform generation cartoon is crossed the D/A conversion and is exported pumping signal to the high frequency power amplifier card with the analog quantity form;
Transfer to the sensor multi-channel switching card behind the power ascension of described high frequency power amplifier card with pumping signal;
Described sensor multi-channel switching card is input to pumping signal excitation piezoelectric element selected in extraneous piezoelectric excitation-sensing network again;
The transducing signal of the analog quantity form that selected sensing piezoelectric element produces in extraneous piezoelectric excitation-sensing network transfers to programme-controlled gain charge amplifier by the sensor multi-channel switching card and sticks into the row amplification, and the transducing signal after the amplification transfers to system controller card again after high-speed data acquisition card is converted into digital quantity by A/D;
Described sensor multi-channel switching card receive send by bus and by the channel control signals that system controller card produces, control it and carry out passage and switch, monitor the passage switching state of this card simultaneously;
Described programme-controlled gain charge amplifier clamping receive send by bus and by the enlargement factor control signal that system controller card produces, control its enlargement factor and sensitivity, monitor the state of a control of this card simultaneously.
2, the integrated piezoelectric hyperchannel scanning structural healthy monitoring system based on computer bus as claimed in claim 1, it is characterized in that, except that system power supply, touch-screen and each integrated circuit board are connected on the unified computer system bus backboard, carry out communication by bus between each integrated circuit board and the system controller card, touch-screen directly passes through display interface device and its communication of system controller card.
3, the integrated piezoelectric hyperchannel scanning structural healthy monitoring system based on computer bus as claimed in claim 1, it is characterized in that described system power supply, system bus backboard, system controller card, touch-screen, random waveform generation card, high-speed data acquisition card, high frequency power amplifier card, programme-controlled gain charge amplifier card, sensor multi-channel switching card are integrated in the computing machine integral aluminum alloy heat-dissipating casing that can prevent electromagnetic interference (EMI).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920041926U CN201387385Y (en) | 2009-03-18 | 2009-03-18 | Integration piezoelectricity multi-channel scanning structural health monitoring system based on computer bus |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426195A (en) * | 2011-10-11 | 2012-04-25 | 中国飞机强度研究所 | Structural damage monitoring system and monitoring method thereof |
| WO2012172124A1 (en) * | 2011-06-15 | 2012-12-20 | Aernnova Engineering Solutions Iberica | Multi-channel electronic architecture for advanced monitoring of structural integrity using ultrasonic guided wave or lamb wave technology |
| CN104279424A (en) * | 2013-07-02 | 2015-01-14 | 香港理工大学 | Method and system for detecting and displaying structural damage situation of pipeline |
| CN104748991A (en) * | 2013-12-26 | 2015-07-01 | 波音公司 | Detection and assessment of damage to composite structure |
| CN106813714A (en) * | 2015-12-02 | 2017-06-09 | 博感公司 | The device and system of monitoring structural health conditions |
| CN112131169A (en) * | 2020-09-07 | 2020-12-25 | 华东计算技术研究所（中国电子科技集团公司第三十二研究所） | High speed data communication system and method |
| CN113884773A (en) * | 2021-09-29 | 2022-01-04 | 广东电网有限责任公司 | Parameter acquisition circuit based on ultralow frequency cosine square wave and dielectric loss angle calculation method |
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2009
- 2009-03-18 CN CN200920041926U patent/CN201387385Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012172124A1 (en) * | 2011-06-15 | 2012-12-20 | Aernnova Engineering Solutions Iberica | Multi-channel electronic architecture for advanced monitoring of structural integrity using ultrasonic guided wave or lamb wave technology |
| CN102426195A (en) * | 2011-10-11 | 2012-04-25 | 中国飞机强度研究所 | Structural damage monitoring system and monitoring method thereof |
| CN104279424A (en) * | 2013-07-02 | 2015-01-14 | 香港理工大学 | Method and system for detecting and displaying structural damage situation of pipeline |
| CN104748991A (en) * | 2013-12-26 | 2015-07-01 | 波音公司 | Detection and assessment of damage to composite structure |
| CN104748991B (en) * | 2013-12-26 | 2019-11-01 | 波音公司 | For testing and evaluation to the method for the damage of composite construction |
| CN106813714A (en) * | 2015-12-02 | 2017-06-09 | 博感公司 | The device and system of monitoring structural health conditions |
| CN112131169A (en) * | 2020-09-07 | 2020-12-25 | 华东计算技术研究所（中国电子科技集团公司第三十二研究所） | High speed data communication system and method |
| CN112131169B (en) * | 2020-09-07 | 2022-03-18 | 华东计算技术研究所（中国电子科技集团公司第三十二研究所） | High speed data communication system and method |
| CN113884773A (en) * | 2021-09-29 | 2022-01-04 | 广东电网有限责任公司 | Parameter acquisition circuit based on ultralow frequency cosine square wave and dielectric loss angle calculation method |
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