CN101275928A - Spaceflight electronic device excess article automatic detection system and detection method - Google Patents
Spaceflight electronic device excess article automatic detection system and detection method Download PDFInfo
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- CN101275928A CN101275928A CNA2008100641931A CN200810064193A CN101275928A CN 101275928 A CN101275928 A CN 101275928A CN A2008100641931 A CNA2008100641931 A CN A2008100641931A CN 200810064193 A CN200810064193 A CN 200810064193A CN 101275928 A CN101275928 A CN 101275928A
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Abstract
The present invention provides a system for automatically detecting the redundant object of the spaceflight electronic device and a detecting method. The system comprises the following components: a sound sensor 1, a rotating platform 2, a crank-rocker mechanism 3, an IO*amp;DA board card 4, a transducer 5, a three-phase machine 6, a sound signal regulating circuit 7, a real-time data collection card 8 and an upper machine processor 9. The sound sensor is adhibited on the external wall of the detected pice. The sound sensor 1 is connected with the sound signal regulating circuit 7 through a signal wire. The sound signal regulating circuit 7 is connected to the real-time data collection card 8. The real-time data collection card 8 is connected with the upper machine processor 9. The upper machine process 9 is connected with the control end of the transducer 5 through the IO*amp;DA board card 4. The transducer 5 is connected to the three-phase machine 6 which drives the rotating platform 2 through the crank-rocket mechanism 3. The invention settles the problems of no high detecting precision, no strong objectivity, no realization for automatic detection or automatic determining, only determination to the existence of the redundant particle, no determination to the material and characteristic of the redundant object and the like in the existing traditional PIND detection method.
Description
(1) technical field
The present invention relates to the electronic monitoring technology, what be specifically related to is the automatic testing method of the inner fifth wheel of electronic installation.
(2) background technology
Spaceflight electronic device extensively just is used for national defense and military fields such as military affairs, Aeronautics and Astronautics.Electronic installation is the important component part in the national defense system.Guarantee that because of a little electronic apparatus functions is normal, not breaking down is the key of guaranteeing task success and personnel and device security.Airtight electronic installation is being made, was being assembled in the process, and being easy to particles such as a dust, plastics bits, scolding tin, to be encapsulated in relay interior and be attached on the electronic installation internals and form excess micro-particle.In the electronic installation course of work, external impact or vibration make the collision of fifth wheel random walk, may cause error action of device to be done or inefficacy, even cause boat major break down, fifth wheel problem to become the major issue of puzzlement spaceflight electronic device development.Because the restriction of China's present stage electronic installation manufacturing technology level also can't realize eliminating from root the generation of excess micro-particle.Can only come whether to contain in the detection. electronics fifth wheel by certain method, reject the electronic installation that contains fifth wheel then.
Still do not have standard for the fifth wheel detection of spaceflight electronic device and module at present, all do not provide clearly regulation in American army mark, the national military standard.Dependence test with reference to national military standard for fifth wheel examination criteria in the aerospace electron components and parts---particle collision walkaway (PIND) method (American army mark MIL-PRF-39016E regulation).In the traditional PI ND test method, testing result mainly relies on people's E ﹠ E mode of listening to judge whether fifth wheel exists, often occur in the practical operation causing accuracy of detection not high owing to reasons such as operating personnel's fatigue, carelessness cause omission or misjudgment phenomenon, objectivity is not strong.
Therefore, the fifth wheel detection technique of research sealed electronic device, particularly the fifth wheel detection technique of spaceflight electronic device and preventive measure have important significance for theories and practical value to the reliability that guarantees whole Defensive Avionics System, especially satellite, guided missile, manned space flight airship.
(3) summary of the invention
The objective of the invention is in order to solve existing traditional PI ND detection method accuracy of detection not high, objectivity is not strong, can not realize detecting automatically automatically differentiating, and can only make judgement to having or not of excess micro-particle, can't make problems such as judgement to the material feature of fifth wheel, thereby a kind of automatic checkout system of sealed electronic device excess micro-particle is provided.
System of the present invention forms and comprises: sound transducer 1, turntable 2, crank and rocker mechanism 3, IO﹠amp; DA integrated circuit board 4, frequency converter 5, three phase electric machine 6, voice signal modulate circuit 7, real-time data acquisition card 8 and host computer processor 9; Sound transducer is attached on the measured piece outer wall, and sound transducer 1 is connected with voice signal modulate circuit 7 by signal wire; Voice signal modulate circuit 7 connects real-time data acquisition card 8; Real-time data acquisition card 8 connects host computer processor 9, and host computer processor 9 passes through IO﹠amp; DA integrated circuit board 4 is connected with the control end of frequency converter 5; Frequency converter 5 connects three phase electric machine 6, and three phase electric machine 6 drives turntable 2 by crank and rocker mechanism 3.
The present invention also has some technical characterictics like this:
1, described crank and rocker mechanism comprises the three phase electric machine 6 of big disk 11, drive big disk 11 one-directional rotation, big disk 11 connects bottom roundel 12 by connecting rod 14, top roundel 13 connects bottom roundel 12 by cog belt 10, and an end mini-roundabout 13 is connected and fixed with turntable panel 15;
2, real-time data acquisition card 8 is inserted in slotting being pickled with grains or in wine of PCI of host computer processor 9, by pci bus signal data is delivered to host computer processor 9 input ends;
3, described frequency converter 5 connects three phase electric machine 6, and three phase electric machine is connected with scrambler by axle, and scrambler connects the high speed counting module counting, and high speed counting module is connected with the host computer processor by serial ports, and the control output end of processor connects frequency converter;
4, described host computer processor 9 is inserted poor and IO﹠amp by PCI; DA integrated circuit board 4 connects IO﹠amp; DA integrated circuit board 4 is connected by the control end of data line with frequency converter 5;
5, described modulate circuit comprises forward ratio amplifying circuit that is made of resistance R 21, R22, R23, R24 capacitor C 21, C22 amplifier AD817 and the voltage follower circuit that is made of resistance R 32, R33 capacitor C 31, C32 amplifier LF356.
Another bright purpose of this law is to provide a kind of detection method of automatic checkout system of sealed electronic device excess micro-particle, and it may further comprise the steps:
I, host computer processor 9 power on system initialization;
Ii, host computer processor 9 are provided with the motor speed parameter earlier, pass through IO﹠amp again; The DA plate provides control signal starting three phase electric machine 6;
Iii, three phase electric machine 6 drive turntable 2 by crank and rocker mechanism 3 and rotate;
It is 1 minute that iv, host computer processor 9 are provided with the continuous rotation time of turntable, makes system be in the fifth wheel state of activation, turntable rotation amplitude value of reaching capacity when promptly controlling turntable panel 15 and contacting with barrier 16.
The system's fifth wheel state of activation that stops operating v, turntable finishes;
Parameters such as vi, 9 pairs of sample frequency of host computer processor, device model are provided with and control starting turntable 2, repeating step ii, iii, the real-time data acquisition of call function storehouse configuration simultaneously card 8 carries out taking turns data acquisition, and the data of collection are back to host computer processor 9;
Vii, 9 pairs of data of adopting back of host computer processor are carried out homomorphic filtering, cross-correlation analysis is removed spike and disturbed;
Viii, host computer processor 9 are used the wavelet analysis algorithm to step vii data processed again and are carried out threshold decision, draw the conclusion that has or not fifth wheel;
Ix, 9 couples of step vii of host computer processor data processed are discerned in time domain and the recognition methods of frequency domain application fifth wheel respectively, judge fifth wheel material characteristic information, obtain metal or nonmetal conclusion.
The data that x, 9 pairs of host computer processors collect are preserved, and the conclusion printout of analyzing.
This detection method also has some technical characterictics like this:
1, the state of activation of the fifth wheel of described system is: after the host computer processor provided control signal starting turntable, the thing of placing obstacles in the turntable rotating process made the turntable all standing activate fifth wheel to produce braking acceleration;
2, the requirement for height of described barrier is turntable rotation amplitude value of reaching capacity when the turntable panel contacts with barrier, and described ultimate value is ± 60 °, and the turntable rotation amplitude is adjusted mechanically;
3, described host computer processor 9 is provided with the motor speed parameter earlier, and the motor speed parameter is 120 °/s～240 °/s.
Principle of work of the present invention is: measured piece is fixed on the turntable, the forward and reverse rotation of turntable drives the measured piece movement therewith, the fifth wheel particle is activated free and produces displacement in electronic installation in the measured piece, fifth wheel displacement in electronic installation will be divided into slip and clash into two processes, in sliding process, can form the slip acoustic emission, and the sound wave that produces at knockout process is the continuous spectrum acoustical signal.The course of work of detection system is that fifth wheel slides in electronic installation and the anabolic process at random of clashing into.In this process, apparatus wall will be propagated stress elastic wave and sound wave, and form reverb signal.The sound transducer of using in the detection system can pick up this signal, thereby realizes the detection of electronic device excess article.Produce sound and export with voltage form by sound transducer, after preposition modulate circuit amplifies, by the real-time data acquisition card with signals collecting to host computer, provide testing result behind the software analysis.Comprised the information that fifth wheel has or not among the result.And define the certain mass grade (＞1mg) under the prerequisite of fifth wheel, fifth wheel material feature is made judgement.
At the particle signal characteristics of different quality grade, utilize signal processing technologies such as wavelet analysis, homomorphic filtering, filtering heterogeneity noise signal realizes the automatic detection of excess micro-particle; Use the correlation theory of fifth wheel identification, extract the distribution characteristics of excess micro-particle, set up different materials excess micro-particle feature samples storehouse,, realize the differentiation of fifth wheel granular metal, non-metallic material feature by analyzing the signal characteristic quantity of measured signal excess micro-particle.
Beneficial effect of the present invention has:
1, the present invention has designed and has been fit to motor-driven turntable physical construction, and has realized the motor-driven of turntable.Detect reliable and stable.And realized activation to fifth wheel in the tested device by modification to mechanical part;
2, the present invention handles tested fifth wheel signals collecting by the data set system to host computer, and host computer provides the differentiation result automatically after signal extraction, de-noising, threshold process.And the present invention has realized judgement to fifth wheel material feature (metal, nonmetal) in the tested device by the signal time and frequency domain characteristics.
(4) description of drawings
Fig. 1 is collectivity Scheme Design figure of the present invention;
Fig. 2 is the Design of Mechanical Structure figure of turntable;
Fig. 3 is the turntable left view;
Fig. 4 is that the position of turntable and barrier concerns synoptic diagram;
Fig. 5 is the motor-driven design drawing of turntable;
Fig. 6 is the circuit theory diagrams of modulate circuit;
Fig. 7 is the design frame chart of data collecting card;
Fig. 8 is the upper computer software design drawing;
Fig. 9 is the observation interface synoptic diagram; Figure 10 is for detecting the algorithm flow chart that fifth wheel has or not automatically;
Figure 11 is for judging the host computer algorithm flow chart of fifth wheel material feature.
(5) embodiment
The present invention is further illustrated below in conjunction with the drawings and specific embodiments:
1, the Design of Mechanical Structure of turntable
(1) in conjunction with Fig. 1, the present embodiment system forms and comprises: sound transducer 1, turntable 2, crank and rocker mechanism 3, IO﹠amp; DA plate 4, frequency converter 5, three phase electric machine 6, voice signal modulate circuit 7, real-time data acquisition card 8 and host computer processor 9.Sound transducer 1 is attached on the measured piece outer wall, and sound transducer 1 is connected with signal conditioning circuit 6 by signal wire; Signal conditioning circuit 6 amplifies the back by the output of PNC plug with signal, is imported by the DB9 plug via the data line other end; Real-time data acquisition card 8 is inserted in slotting being pickled with grains or in wine of PCI of host computer processor 9, by pci bus signal data is delivered to host computer processor 9, and host computer processor 9 is inserted poor and IO﹠amp by PCI; DA integrated circuit board 4 connects; IO﹠amp; DA integrated circuit board 4 is connected by the control end of data line with frequency converter 5; Frequency converter 5 connects three phase electric machine 6, and three phase electric machine 6 drives turntable 2 by crank and rocker mechanism 3.
In conjunction with Fig. 2, wherein, panel height: 900cm; Panel size: 650cm * 650cm; Base size: 850cm * 1050cm.
(2) crank and rocker mechanism is realized motor-driven design
In conjunction with Fig. 3, three phase electric machine 6 drives big disk 11 one-directional rotation during work, and big disk 11 rotates by connecting rod 14 drive bottom roundels 12 positive inhours, and top roundel 13 is connected by cog belt 10 and the positive synchronously inhour of bottom roundel 12 is rotated.Item end mini-roundabout 13 is connected and fixed with turntable panel 15, thereby has realized that by crank and rocker mechanism the motor one-directional rotation drives the 15 forward and reverse rotations of turntable panel.
2, fifth wheel activates scheme
(1) background
In system work process,, there is not fifth wheel thereby judge by accident to be decided to be often because fifth wheel is sandwiched in the device slit and can't produces voice signal.The reliability that system is detected descends greatly.Therefore needing certain mode will install interior fifth wheel activates.
(2) specific implementation process (adopting bump to activate):
The state of activation of the fifth wheel of system is: after the host computer processor provided control signal starting turntable, placing obstacles in the turntable rotating process made the turntable all standing, at this moment will produce great braking acceleration and activate fifth wheel.
In conjunction with Fig. 4, wherein, the requirement for height of barrier 16 is turntable rotation amplitude value of reaching capacity (± 60 °) when turntable panel 15 contacts with barrier 16, and the turntable rotation amplitude can be adjusted mechanically.Can make barrier on the position, reach above requirement by adjusting.Promptly do not influence the continuous rotation of turntable, can just produce again and activate acceleration at critical point braking turntable.
When activating the adjustable panoramic table panel amplitude of fluctuation that finishes to fifth wheel, we make the turntable operate as normal.
3, the motor-driven of turntable design
In conjunction with Fig. 5, host computer processor 9 is inserted poor and IO﹠amp by PCI; DA integrated circuit board 4 connects; IO﹠amp; DA integrated circuit board 4 is connected by the control end of data line with frequency converter 5; Frequency converter 5 connects three phase electric machines 6, and three phase electric machine is connected with scrambler by axle, and scrambler connection high speed counting module is counted, and high speed counting module is connected with the host computer processor by serial ports the real-time speed of motor is fed back to the host computer processor.Processor provides control signal to frequency converter 5, by frequency converter 5 (FVR1.5E9S-7JE) three phase electric machine 6 (YZ-80M2-6) is carried out speed governing.Three phase electric machine 6 rotates by crank and rocker mechanism 3 driving turntables 2, and turntable 2 drives the tested device rotation and makes fifth wheel activation in the device.Fifth wheel produces displacement signal in device, sound transducer 1 picks up this signal.Fainter because of sound transducer 1 output signal, therefore need to amplify through voice signal modulate circuit 7.The signal that is exaggerated is collected the host computer processor processing and is shown the output result by real-time data acquisition card 8.
Host computer processor 9 output speed signals (digital quantity) through DA be transformed to the DC speed regulation signal simultaneously host computer processor 9 send control signal and pass through IO﹠amp; DA plate 4 control of conversion devices 5 break-makes (being the start-stop of motor).The actual speed of three phase electric machine 6 outputs feeds back to 8 pairs of three phase electric machine 6 speed of host computer processor by scrambler in real time in conjunction with high speed counting module and adjusts.
4, the design of modulate circuit
Because therefore the sound transducer weak output signals needs to amplify through modulate circuit could be by good the collecting of data collecting card.Major parameter is as follows:
Input: 50mV～100mV (weak)
Gain: 10～50 (adjustable)
Bandwidth:＞300kHz (sound transducer center resonant frequency 150kHz)
In conjunction with Fig. 6, modulate circuit comprises the forward ratio amplifying circuit that is made of resistance R 21, R22, R23, R24 capacitor C 21, C22 amplifier AD817 and and is made up of the voltage follower circuit that resistance R 32, R33 capacitor C 31, C32 amplifier LF356 constitute.According to above index request, wherein select for use one-level AD817 unity gain bandwidth can reach 40MHZ, when unity gain is 50 Time Bandwidths＞300kHz, meet the demands.Secondary adopts the LF356 voltage follow.For reducing noise, circuit adopts power decoupling, the mode of inter-stage R-C coupling.
5, the design of real-time data acquisition card
The effect of real-time data acquisition card is that sound transducer output is gathered to the analysis of host computer processor processing through amplifying signal.
In conjunction with Fig. 7, + 5V～-5V signal (output of sound modulate circuit) input through modulate circuit be transformed to 0V～+ 5V (voltage that analog-to-digital conversion module can be discerned), carrying out analog to digital conversion by the AD9220 analog-digital chip again is that digital signal deposits FIFO cache chip buffer memory in, starts a data transfer by the CPLD logic control when FIFO is half-full.Wherein CPLD logic control chip adopts EPM7064, and pci interface chip adopts PCI954, and the modulate circuit amplifier adopts AD812, and the FIFO cache chip adopts IDT7207.The sample frequency of real-time data acquisition card is: 500kHz～10MHz.
6, upper computer software design
Because host computer is being controlled the whole experiment flow of system of the present invention, so that the design of upper computer software just seems is particularly important.System's host computer adopts the VC++ based on windows platform to write, and mainly realizes functions such as data waveform output, signal Processing and automatic identification.
In conjunction with Fig. 8, host computer work mainly is divided into two modules: PIND test operation module and system parameter setting module, wherein PIND test operation module comprises again, waveform show control, synchronously data acquisition-controlling, the automatic detection algorithm of fifth wheel, with slave computer communication protocol management, motor-driven variable frequency regulating speed control; The system parameter setting module comprises, the data base administration of tested electronic installation model, the library management of operating personnel's data, system operational parameters data base administration, system registry management.
Upper computer software acting as in system: host computer processor 9 earlier to motor speed (120 °/s～240 °/s) parameter is provided with, and passes through IO﹠amp again; The DA plate provides control signal starting three phase electric machine 6, and three phase electric machine 6 drives turntable 2 by crank and rocker mechanism 3 and rotates; It is 1 minute that the continuous rotation time of turntable is set, and makes system be in the fifth wheel state of activation; The system's fifth wheel state of activation that stops operating turntable finishes; 9 pairs of host computer processors are provided with and control starting turntable 2 to parameters such as sample frequency, device models, and the real-time data acquisition of call function storehouse configuration simultaneously card 8 carries out taking turns data acquisition, and the data of collection are back to host computer processor 9; 9 pairs of data of adopting back of host computer processor are carried out homomorphic filtering, the cross-correlation analysis deglitch disturbs; And the data that collect are used the wavelet analysis algorithm carry out threshold decision, draw the conclusion that has or not fifth wheel; Again the data that collect are discerned in time domain and the recognition methods of frequency domain application fifth wheel respectively, judged fifth wheel material characteristic information (metal, nonmetal); The data that collect are preserved, and the conclusion printout of analyzing, the experiment of a beginning new round.Detect main interface as shown in Figure 9, ten buttons in the left side are operated for the user.The top combo box is a Test Information.The centre is that waveform shows control, and wherein illustrated pulse signal is the fifth wheel signal.The lower end form is the correlation parameter of fifth wheel pulse signal.
Automatically detect algorithm flow chart such as Figure 10 that fifth wheel has or not, used the principle of wavelet analysis in the algorithm, select for use db10 to carry out wavelet noise as wavelet basis.Result to wavelet noise carries out the threshold decision first time, carry out cross-correlation analysis then and remove spike interference (may cause) by foeign elements such as power supplys, do threshold decision for the second time at the most responsive 153K frequency range of fifth wheel signal again, finally provide the differentiation result.
Judge host computer algorithm flow chart such as Figure 11 of fifth wheel material feature, because analyzing the information of fifth wheel signal demand all is included in the middle of the pulse that a series of amplitudes do not wait, is useless and face interpulse blank signal mutually for analytic signal, also can produce unnecessary interference.Therefore need extract the fifth wheel signal and splice before the identification fifth wheel.Carry out the FFT conversion then, by spectral shape factor and frequency spectrum barycenter the material feature of fifth wheel is made judgement at frequency domain.
Claims (10)
1, a kind of automatic checkout system of sealed electronic device excess micro-particle is characterized in that it comprises sound transducer (1), turntable (2), crank and rocker mechanism (3), IO﹠amp; DA plate (4), frequency converter (5), three phase electric machine (6), signal conditioning circuit (7), real-time data acquisition card (8) and host computer processor (9); Sound transducer is attached on the measured piece outer wall, and sound transducer (1) is connected with voice signal modulate circuit (7) by signal wire; Voice signal modulate circuit (7) connects real-time data acquisition card (8); Real-time data acquisition card (8) connects host computer processor (9), and host computer processor (9) passes through IO﹠amp; DA plate (4) is connected with the control end of frequency converter (5); Frequency converter (5) connects three phase electric machine (6), and three phase electric machine (6) drives turntable (2) by crank and rocker mechanism (3).
2, the automatic checkout system of sealed electronic device excess micro-particle according to claim 1, it is characterized in that described crank and rocker mechanism comprises big disk (11), three phase electric machine (6) when driving the work of big disk (11) one-directional rotation, big disk (11) connects bottom roundel (12) by connecting rod (14), top roundel (13) connects bottom roundel (12) by cog belt (10), and an end mini-roundabout (13) is connected and fixed with turntable panel (15).
3, the automatic checkout system of sealed electronic device excess micro-particle according to claim 2, it is characterized in that described real-time data acquisition card (8) is inserted in slotting being pickled with grains or in wine of PCI of host computer processor (9), delivers to host computer processor (9) input end by pci bus with signal data.
4, the automatic checkout system of sealed electronic device excess micro-particle according to claim 3, it is characterized in that described frequency converter (5) connects three phase electric machine (6), three phase electric machine is connected with scrambler by axle, scrambler connects the high speed counting module counting, high speed counting module is connected with the host computer processor by serial ports, and the control output end of processor connects frequency converter.
5, the automatic checkout system of sealed electronic device excess micro-particle according to claim 4 is characterized in that described host computer processor (9) is by the slotting poor and IO﹠amp of PCI; DA plate (4) connects, IO﹠amp; DA plate (4) is connected by the control end of data line with frequency converter (5).
6, the automatic checkout system of sealed electronic device excess micro-particle according to claim 5 is characterized in that described modulate circuit comprises forward ratio amplifying circuit that is made of resistance (R21, R22, R23, R24), electric capacity (C21, C22), amplifier AD817 and the voltage follower circuit that is made of resistance (R32, R33), electric capacity (C31, C32), amplifier LF356.
7, a kind of detection method of automatic checkout system of sealed electronic device excess micro-particle is characterized in that it may further comprise the steps: i, host computer processor (9) power on system initialization;
Ii, host computer processor (9) are provided with the motor speed parameter earlier, pass through IO﹠amp again; The DA plate provides control signal starting three phase electric machine (6);
Iii, three phase electric machine (6) drive turntable (2) by crank and rocker mechanism (3) and rotate;
It is 1 minute that iv, host computer processor (9) are provided with the continuous rotation time of turntable, makes system be in the fifth wheel state of activation, promptly controls turntable panel (15) and barrier (16) turntable rotation amplitude value of reaching capacity when contacting.
The system's fifth wheel state of activation that stops operating v, turntable finishes;
Vi, host computer processor (9) are provided with and control starting turntable (2) to parameters such as sample frequency, device models, repeating step ii,
Iii, call function storehouse configuration real-time data acquisition card (8) carries out taking turns data acquisition simultaneously, and the data of collection are back to host computer processor (9);
Vii, host computer processor (9) carry out homomorphic filtering, the interference of cross-correlation analysis removal spike to the data of adopting back;
Viii, host computer processor (9) are used the wavelet analysis algorithm to step vii data processed again and are carried out threshold decision, draw the conclusion that has or not fifth wheel;
Ix, host computer processor (9) are discerned in time domain and the recognition methods of frequency domain application fifth wheel respectively step vii data processed, judge fifth wheel material characteristic information, obtain metal or nonmetal conclusion.
X, host computer processor (9) are preserved the data that collect, and the conclusion printout of analyzing.
8, the detection method of the automatic checkout system of sealed electronic device excess micro-particle according to claim 7, the state of activation that it is characterized in that the fifth wheel of described system is: after the host computer processor provided control signal starting turntable, the thing of placing obstacles in the turntable rotating process made the turntable all standing activate fifth wheel to produce braking acceleration.
9, the detection method of the automatic checkout system of sealed electronic device excess micro-particle according to claim 8, the requirement for height that it is characterized in that described barrier is turntable rotation amplitude value of reaching capacity when the turntable panel contacts with barrier, described ultimate value is ± 60 °, and the turntable rotation amplitude is adjusted mechanically.
10, the detection method of the automatic checkout system of sealed electronic device excess micro-particle according to claim 8 is characterized in that described host computer processor 9 is provided with the motor speed parameter earlier, and the motor speed parameter is 120 °/s～240 °/s.
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