CN101806917A - Device and method for detecting remainder of sealed electronic element based on random vibration - Google Patents
Device and method for detecting remainder of sealed electronic element based on random vibration Download PDFInfo
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Abstract
The invention discloses a device and a method for detecting a remainder of a sealed electronic element based on random vibration, relates to the device and the method for detecting the remainder of the sealed electronic element, and solves the problem that the device and the method for detecting the remainder of the sealed electronic element cannot play the best detection capacity of detection equipment due to the adoption of fixed-frequency sinusoidal vibration. The device comprises that: a waveform generating module of the device receives random waveform data of an intelligent control module to form a random waveform drive vibration table of a specified frequency band. The method comprises the following steps: acquiring acceleration signals of the vibration table in real time by using the intelligent control module; performing power spectrum estimation; comparing the powder spectrum with a reference spectrum; performing spectrum equalization; performing Fourier transform on the equalized powder spectrum after phase randomization; transmitting a converted result after time domain randomization into a waveform generating circuit, and outputting and loading the converted result to the vibration table; and executing repeatedly for realizing closed loop control. The device and the method are suitable to be used in a process of detecting the remainder of the sealed electronic device.
Description
Technical field
The present invention relates to a kind of pick-up unit and method of remainder of sealed electronic element.
Background technology
Sealed electronic elements such as semiconductor components and devices, integrated circuit, aerospace relay are the basic elements that is widely used in Defensive Avionics Systems such as Aero-Space, weaponry, play an important role in subsystems such as control, navigation, signal transmission, power distribution, attitude adjustment.For example, the sealed electronic element that certain carrier space vehicle control system uses is ten hundreds of, this shows that the reliability of sealed electronic element directly affects the reliability of space flight model.
Because sealed electronic element manufacturing process complexity, demand is little, of a great variety, manual setting in batches, is encapsulated in particles such as some dusts, plastics bits, scolding tin interior easily and attached in the electronic devices and components internals, the formation fifth wheel.Under the weightlessness of components and parts work, overweight, impact shock environment, activate and dissociate out, may cause its inner short circuit or open circuit fault.Each process procedure that sealed electronic element is manufactured all may produce or introduce fifth wheel, and restive, the fault that is caused has stronger sudden and randomness, is difficult for before the fault being discovered, and is difficult to again confirm afterwards, therefore endangers especially severe.Because the emission interruption of service of the carrier rocket that the inner removable excess micro-particle of components and parts causes, satellite, guided missile, space shuttle repeatedly takes place, and has caused the loss that can't estimate.Therefore, research fifth wheel detection technique and preventive measure, to guaranteeing whole Defensive Avionics System, the reliability of especially space flight model has important significance for theories and practical value.
The control of fifth wheel problem is crucial, but in present stage, the design basis of China's components and parts is theoretical weak, manufacturing technology level falls behind, control effect to the fifth wheel problem is unsatisfactory, therefore, can only guarantee not contain in the sealed electronic element fifth wheel by certain detection means.The fifth wheel detection method that generally adopts both at home and abroad comprises at present: microscopic examination method, radiograph method, compound detection method, particle collision walkaway (Particle Impact Noise Detection, PIND) method etc., wherein the PIND method owing to have fast, convenient, cost is low and advantage such as sensitivity height is widely used.At present, the PIND method has been put into China's war industry standard, in military electronic devices and components fifth wheel screening, guarantees that space flight model reliability aspect plays an important role.
The ultimate principle of PIND method is: detected device is fixed on the special vibrating platform, by standard code it is applied the vibration and the impact of certain frequency and acceleration, when having fifth wheel in the device, this fifth wheel will produce irregular noise signal, this signal is shown in the oscillograph after amplifying circuit amplifies, when noise signal surpasses predetermined threshold, illustrate and contain fifth wheel in the measured device.Wherein impact the fifth wheel make attached to inwall and activate, for collision creates conditions, vibration makes fifth wheel obtain energy, thereby collides with shell and sound, and reaches the purpose of detection.The PIND method is a kind of fifth wheel detection method based on collision, and collision strength is big more, helps more detecting.
The PIND method has experienced the development of decades from producing so far, has obtained using widely, and be put into a plurality of war industry standards of China, and as GJB360A method 217, GJB548A method 2020A, GJB128A method 2052, GJB65B appendix B, GJB2888 appendix B etc.
The PIND equipment of widespread use at present all is based on single-frequency sinusoidal motivation control, in practice for many years, it is found that for the certain measurand of housing depth the detection effect of using the test condition of different vibration frequencies is different, promptly has optimum vibration frequency.Therefore, above-mentioned standard is respectively with the relation of scheming, mode such as table, experimental formula is stipulated vibration frequency and housing depth.Analyze and find, figure, table, experimental formula in each army's mark are unified, all are based on hard sphere collision theory, examine from the simplified model of desirable bead and standard cavity.
But in actual detected, because the diversity of fifth wheel particle shape (material, shape, hardness etc.) and the polytrope of the irregular housing depth that causes of tested components and parts cavity geometry, definite difficulty of optimum vibration frequency is bigger, even can't realize.Sometimes even because shape of particle irregular, increased the randomness of collision, causing optimum vibration frequency often is not a Frequency point but a frequency band.This shows that the definite of optimum vibration frequency only has theory significance, be difficult in the reality obtain and actual optimal drive frequency of coincideing, do not given play to the detection effect of its optimum based on the PIND method of deciding frequency vibration of single-frequency sinusoidal motivation.
There is following problem in existing PIND checkout equipment drive system:
(1) the vibration test condition of drive system all adopts the sinusoidal vibration of deciding frequency, the computing method of the optimum vibration frequency of regulation are too idealized in army's mark at present, quite different with reality, test condition is single, optimum vibration frequency and calculated value are difficult to meet, and can not bring into play the optimum detection ability of checkout equipment;
(2) impacting is the important tests condition that fifth wheel activates, and excessively may cause tested components and parts to damage, and too smallly can not activate fifth wheel effectively again, and the control accuracy of pilot system impact in the past is relatively poor, and dispersiveness is bigger.
Summary of the invention
The present invention is in order to solve existing remainder of sealed electronic element automatic detection device and method owing to adopt fixed sinusoidal vibration frequently to cause bringing into play the problem of the optimum detection ability of checkout equipment, thereby a kind of pick-up unit and method of the remainder of sealed electronic element based on random vibration are provided.
Pick-up unit based on the remainder of sealed electronic element of random vibration, its involving vibrations platform, it also comprises intelligent control module, waveform generation module, amplitude adjusted module, power amplifier module, acceleration transducer and Accelerator Feedback module, and described amplitude adjusted module is made up of D/A switch unit and reference voltage regulon; The voltage signal output end of described reference voltage regulon is connected with the voltage signal input end of D/A switch unit; The control signal output ends of intelligent control module is connected with the signal input end of waveform generation module; The waveform signal output terminal of waveform generation module is connected with the waveform signal input end of D/A switch unit, and the signal output part of described D/A switch unit is connected with the signal input part of power amplifier module; The drive signal output terminal of described power amplifier module is connected with the driving signal input of shaking table; Acceleration transducer is arranged on the shaking table, the signal output part of acceleration transducer is connected with the signal input part of Accelerator Feedback module, and the first acceleration signal output terminal of described Accelerator Feedback module is connected with the acceleration signal input end of intelligent control module; The intelligent control module voltage signal output end is connected with the signal input part of reference voltage regulon.
Based on the detection method of the remainder of sealed electronic element of the random vibration of said apparatus, it may further comprise the steps:
Signal after step 2, the conversion that step 1 is obtained carries out power Spectral Estimation, the picked up signal power spectrum;
Power spectrum behind step 5, the phase randomization that step 4 is obtained carries out inverse Fourier transform, obtains result after the conversion;
The result carries out time-domain randomization and handles after step 6, the conversion that step 5 is obtained, obtains the result that time-domain randomization is handled;
The result that step 7, intelligent control module obtain step 6 sends into the D/A switch unit and carries out D/A switch, the result after obtaining to change;
Result after step 8, the conversion that step 7 is obtained sends into waveform generation module, the result of waveform generation module after according to described conversion adjusts the output waveform of waveform generation module, described output waveform is behind D/A converting unit and power amplifier module, be loaded on shaking table, and returning step 1, the remainder of sealed electronic element of finishing random vibration detects automatically.
The present invention adopts the random vibration method and device is carried out closed-loop control, thus the optimum detection ability of performance checkout equipment, and the reliability and the degree of regulation of system are greatly improved.
Description of drawings
Fig. 1 is the structural representation of apparatus of the present invention; Fig. 2 is the structural representation of the specific embodiment of the invention five; Fig. 3 is a principle of work synoptic diagram of the present invention; Fig. 4 is the circuit theory diagrams of amplitude adjusted module; Fig. 5 is the principle schematic of the specific embodiment of the invention nine; Fig. 6 is the circuit theory synoptic diagram of power amplifier module of the present invention; Fig. 7 is the circuit theory diagrams of intelligent control module in the embodiment nine.
Embodiment
Embodiment one, this embodiment is described in conjunction with Fig. 1, pick-up unit based on the remainder of sealed electronic element of random vibration, its involving vibrations platform 6, it also comprises intelligent control module 1, waveform generation module 2, amplitude adjusted module, power amplifier module 5, acceleration transducer 17 and Accelerator Feedback module 7, and described amplitude adjusted module is made up of D/A switch unit 3 and reference voltage regulon 4; The voltage signal output end of described reference voltage regulon 4 is connected with the voltage signal input end of D/A switch unit 3; The control signal output ends of intelligent control module 1 is connected with the signal input end of waveform generation module 2; The waveform signal output terminal of waveform generation module 2 is connected with the waveform signal input end of D/A switch unit 3, and the signal output part of described D/A switch unit 3 is connected with the signal input part of power amplifier module 5; The drive signal output terminal of described power amplifier module 5 is connected with the driving signal input of shaking table 6; Acceleration transducer 17 is arranged on the shaking table 6, the signal output part of acceleration transducer 17 is connected with the signal input part of Accelerator Feedback module 7, and the first acceleration signal output terminal of described Accelerator Feedback module 7 is connected with the acceleration signal input end of intelligent control module 1; Intelligent control module 1 voltage signal output end is connected with the signal input part of reference voltage regulon 4.
Principle: by to components and parts inefficacy analysis, test and fail-safe analysis, and, determine that the key technical indexes of present embodiment is as follows with reference to the present situation of corresponding army target regulation and active service PIND checkout equipment:
(1) output of the power of shaking table reaches 0～100N;
(2) random vibration frequency bandwidth: 20～500Hz, minimum control bandwidth 30Hz, dynamic range is greater than 40dB;
Present embodiment by random signal generation circuit and fifth wheel signal differentiate, the Material Identification method realizes above-mentioned technical indicator.
The principle of work of present embodiment: intelligent control module 1 is gathered the acceleration signal of shaking table 6 feedbacks in real time, and the signal that collects is carried out the A/D conversion, the signal after the acquisition conversion; Signal after the conversion that obtains is carried out power Spectral Estimation, the picked up signal power spectrum; The power spectrum signal and the reference spectrum that obtain are compared the line frequency spectrum equalization of going forward side by side, the frequency spectrum after the acquisition equilibrium; The drive signal amplitude of adjusting frequency is carried out phase randomization with the power spectrum after the equilibrium, obtains the power spectrum behind the phase randomization; Power spectrum behind the phase randomization that obtains is carried out inverse Fourier transform, result after the acquisition conversion; Result after the conversion that obtains is carried out time-domain randomization handle, obtain the result that time-domain randomization is handled; The result that intelligent control module 1 will obtain sends into D/A switch unit 3 and carries out D/A switch, the result after obtaining to change; Result after the conversion that obtains is sent into waveform generation module 2, waveform generation module 2 is adjusted the output waveform of waveform generation module according to the result after the described conversion, described output waveform is behind D/A converting unit 3 and power amplifier module 5, be loaded on shaking table 6, and repeat, the remainder of sealed electronic element of finishing random vibration detects automatically.
Random signal generation circuit is the acceleration signal that intelligent control module 1 is gathered shaking table 6 feedbacks in real time, carry out power Spectral Estimation, compare with reference spectrum, carry out spectral equalization again, adjust the different frequency drive signal amplitude, power spectrum after the equilibrium is carried out inverse Fourier transform through behind the phase randomization, pass through time-domain randomization again, the frame time domain data that last intelligent control module 1 will be handled is sent in the dual port RAM of waveform generation module 2, by the 2 control outputs of waveform generation module, be loaded on shaking table 6 through D/A switch circuit 3 and power amplification circuit 5, repeated multiple times realizes closed-loop control.
In the random signal generation circuit, intelligent control module 1 key process unit is a microprocessor, and by interface module editor controlled variable, intelligent control module provides specific control program to subsequent conditioning circuit; When random vibration control, waveform generation module 2 receives intelligent control module 1 and calculates the random waveform data that generate, and Waveform Control module 2 is according to the specified frequency output data, and the random waveform that forms assigned frequency band drives shaking table 6; The amplitude adjustment module is regulated the output waveform amplitude; Waveform takes place and the amplitude adjustment module adopts digital integrated device fully, power amplifier module adopts big voltage power amplifier chip to cooperate big electric current Darlington transistor, have big, the low cost and other advantages of output power, improved system's degree of regulation and reliability greatly, reduced system bulk.
In the present embodiment, can also pass through to change the reference voltage of reference voltage regulon 4, thereby regulate the output amplitude of D/A switch circuit 3.Therefore,, can reach the purpose that changes reference voltage, and then reach the purpose that changes amplitude as long as pass through the input that intelligent control module 1 changes reference voltage regulon 4.
Present embodiment has made full use of modern semiconductor technology, realizes the control of random vibration real-time closed-loop, and many separating components and analog device are replaced with the integrated digital chip, has reduced the volume of system greatly, has strengthened the reliability and the degree of regulation of system.
In the present embodiment, between acceleration transducer 17 and shaking table 6, be provided with isolator 18.
The difference of the pick-up unit of the described remainder of sealed electronic element based on random vibration of embodiment two, this embodiment and embodiment one is, it also comprises computer interface circuit 10, industrial computer 11, data collecting card 12, sound modulate circuit 13 and sound transducer 19, sound transducer 19 is arranged on the shaking table 6, and the signal input part of sound modulate circuit 13 is connected with the signal output part of described sound transducer 19; The second acceleration signal output terminal of Accelerator Feedback module 7 is connected with the first data-signal input end of data collecting card 12; First signal output part of voice signal modulate circuit 13 is connected with the second data-signal input end of data collecting card 12; The data-signal of data collecting card 12 inputs or outputs end and is connected with the data-signal output or the input end of industrial computer 11; The control signal of described industrial computer 11 inputs or outputs end and is connected with the control signal output or the input end of intelligent control module 1 by computer interface circuit 10.
The difference of the pick-up unit of the described remainder of sealed electronic element based on random vibration of embodiment three, this embodiment and embodiment two is, it also comprises display 16, and the shows signal input end of described display 16 is connected with the shows signal output terminal of industrial computer 11.
The difference of the pick-up unit of the described remainder of sealed electronic element based on random vibration of embodiment four, this embodiment and embodiment three is, it also comprises loudspeaker 14 and oscillograph 15, and the voice signal input end of described loudspeaker 14 is connected with the audio signal output terminal of voice signal modulate circuit 13; The waveform signal input end of oscillograph 15 is connected with the waveform signal output terminal of voice signal modulate circuit 13.
In the present embodiment, data collecting card 12 is gathered the voice signal of sound transducer 19 outputs and the acceleration signal of acceleration transducer output in real time, shows sound waveform and acceleration waveform then on display 16.After closed-loop control finishes, in industrial computer 11, use automatic differentiation and Material Identification that wavelet noise and nerual network technique are realized fifth wheel, thereby the remainder of sealed electronic element of finishing based on random vibration detects automatically.
The difference of the pick-up unit of the described remainder of sealed electronic element based on random vibration of embodiment five, this embodiment and embodiment four is, it also comprises keyboard 8 and display screen 9, the Keyboard Control signal output part of described keyboard 8 is connected with the Keyboard Control signal input part of intelligent control module 1, and the shows signal input end of display screen 9 is connected with the shows signal output terminal of intelligent control module 1.
Present embodiment can change the working method of current shaking table 6 or the parameters value of change work at present mode by keyboard 8 and display screen 9, and current parameters is carried out giving each module after the quantification treatment be further processed, on display screen 9, show in real time.
The difference of the pick-up unit of the described remainder of sealed electronic element based on random vibration of embodiment six, this embodiment and embodiment one is that data collecting card 12 is twin-channel data collecting card.
Present embodiment is in the random vibration process, sound transducer 19 detects the voice signal that the fifth wheel bump is produced by the test specimen inwall, and after exporting voice signal modulate circuit 13 to, export loudspeaker 14 sounding on the one hand, export oscillograph 15 on the other hand to and show sound signal waveform.When being subjected to test specimen inside to have fifth wheel, loudspeaker 14 can send the sound, and spike can appear in waveform on the oscillograph 15.
In the random vibration process, the double channel data acquisition card is with the sample frequency synchronous acquisition voice signal of 500kbps and acceleration signal transfers to industrial computer 11 by pci bus and show sound signal waveform and acceleration signal waveform on LCD 16 in real time.After random vibration finishes, on industrial computer 11, use wavelet noise, neural network theory and realize that the fifth wheel signal has or not and differentiate and Material Identification.
The difference of the pick-up unit of the described remainder of sealed electronic element based on random vibration of embodiment seven, this embodiment and embodiment one, two, three, four, five or six is that the model of shaking table 6 is M230 or M230R.
The difference of the pick-up unit of the described remainder of sealed electronic element based on random vibration of embodiment eight, this embodiment and embodiment one, two, three, four, five, six or seven is that intelligent control module 1 is that signal is 32 ARM single-chip microcomputers of STM32F103.
The difference of the pick-up unit of the described remainder of sealed electronic element based on random vibration of embodiment nine, this embodiment and embodiment one, two, three, four, five, six, seven or eight is that waveform generation module 2 is FPGA.
In the present embodiment, various single-chip microcomputers such as intelligent control module 1 employing STM32F103 are as the master control device, and mcu resource is abundant, can reduce the reliability of system bulk and raising system; Waveform generation module 2 is realized that by fpga chip internal resource is abundant, system programmable, and configuration is convenient; D/A 3 is by DAC0832 or other digital-to-analog conversion device, reference voltage regulon 4 is realized by the inner DA of single-chip microcomputer or by digital-to-analog conversion devices such as DAC0832, power amplifier 5 is cooperated high-power darlington pipes such as MJ11032/MJ11033 by integrated power amplifier spare PA78DK; Accelerator Feedback module 7 adopts charge amplifier cooperation operational amplifier realization signal conditioning circuits such as SD1439; Keyboard 8 is 4*4 matrix form button or other input equipments, and display screen 9 is a LCD display, can be realized by the output device of 320240 dot matrix type liquid crystal or other types; Computer interface circuit 10 is the interface circuit of single-chip microcomputer and host computer, adopts serial communication in this invention, and interface chip is MAX232.
Each module hardware circuit is as follows:
(1) intelligent control module
The master control device of this module adopts 32 ARM single-chip microcomputers of high-performance STM32F103, utilize the exchanges data of its inner dma controller realization and FPGA, FPGAD0～FPGAD15 is 16 bit data bus, FPGAA0～FPGAA15 is 16 bit address buses, FSMC_CLK, FSMC_NOE, FSMC_NWE, FSMC_NWAIT, FSMC_NE1～FSMC_NE4 is the dma control logic signal wire, single-chip microcomputer is sent to FPGA with frequency information or with the random data that calculates, and FPGA generates the sinusoidal signal of fixed frequency or the random waveform of nominated bandwidth with the output of data sequence timing; The display module that the present invention selects for use is the LCD module of 320*240 dot matrix, the control signal that intelligent control unit is attached thereto is as follows: LCDD0～LCDD7 is the data line of LCD display, WR is a write signal, RD is a read signal, ELCD is a chip selection signal, A0LCD is the director data selecting side, and RESLCD is a reseting controling signal; The button that the present invention selects for use is input as the 4*4 matrix keyboard, and wherein KEYC1～KEYC4 is the column scan line, and KEYL1～KEYL4 is a horizontal scanning line; The AD/DA resource of single-chip microcomputer inside is as follows, and DA0, DA1 are 2 built-in DA outputs of single-chip microcomputer, and AD0, AD1 are 2 built-in AD input ends of single-chip microcomputer; RXD, TXD are used for realizing communicate by letter with PC system machine, Data transmission and order, thereby the control of realization system machine.This module also has and upper machine communication function and liquid crystal display function, and the working method and the parameters thereof of shaking table can directly be set by host computer, and shows intuitively by display screen 9.
Data are exported after digital-to-analog conversion in the amplitude adjustment module, can reach the purpose that changes the output waveform amplitude by the reference voltage that changes DAC0832.Adopt the reference voltage of the DA control DAC0832 of single-chip microcomputer inside in the present embodiment, therefore can realize changing the magnitude of voltage of output waveform, and reach the purpose of regulating amplitude as long as change the output voltage values of the inner DA of single-chip microcomputer.
The power amplifier module 5 main PA78DK of employing integrated amplifier devices are realized the amplification of voltage, adopt Darlington pair pipe MJ11032/MJ11033 to realize the method that electric current amplifies, and its schematic diagram as shown in Figure 6.The signal OUTPUT that is exaggerated can directly drive shaking table work.Circuit arrangement perfect holding circuit comprise overcurrent protection, overheating protection etc., prevent because driver causes shaking table and sensor to damage unusually or the power amplifier element burns.
In the present embodiment, the output signal of acceleration transducer 17 is the quantity of electric charge, can not directly handle application for subsequent conditioning circuit, therefore adopt acceleration feedback signal to convert charge signal to voltage signal, and the design modulate circuit is used the suitable scope of signal condition for late-class circuit.The charge amplifier that the present invention adopts is SD1439, and when the sensitivity of acceleration transducer 17 was 2pC/g, it was output as 5V/2000g, can satisfy system requirements, and the schematic diagram of power amplifier module as shown in Figure 6.
In the present embodiment, realize that by the voice signal of analyzing sound transducer 19 outputs the fifth wheel signal has or not differentiation and Material Identification.
Claims (10)
1. based on the pick-up unit of the remainder of sealed electronic element of random vibration, its involving vibrations platform (6), it is characterized in that: further comprising intelligent control module (1), waveform generation module (2), amplitude adjusted module, power amplifier module (5), acceleration transducer (17) and Accelerator Feedback module (7), described amplitude adjusted module is made up of D/A switch unit (3) and reference voltage regulon (4); The voltage signal output end of described reference voltage regulon (4) is connected with the voltage signal input end of D/A switch unit (3); The control signal output ends of intelligent control module (1) is connected with the signal input end of waveform generation module (2); The waveform signal output terminal of waveform generation module (2) is connected with the waveform signal input end of D/A switch unit (3), and the signal output part of described D/A switch unit (3) is connected with the signal input part of power amplifier module (5); The drive signal output terminal of described power amplifier module (5) is connected with the driving signal input of shaking table (6); Acceleration transducer (17) is arranged on the shaking table (6), the signal output part of acceleration transducer (17) is connected with the signal input part of Accelerator Feedback module (7), and the first acceleration signal output terminal of described Accelerator Feedback module (7) is connected with the acceleration signal input end of intelligent control module (1); Intelligent control module (1) voltage signal output end is connected with the signal input part of reference voltage regulon (4).
2. the pick-up unit of the remainder of sealed electronic element based on random vibration according to claim 1, it is characterized in that it also comprises computer interface circuit (10), industrial computer (11), data collecting card (12), sound modulate circuit (13) and sound transducer (19), sound transducer (19) is arranged on the shaking table (6), and the signal input part of sound modulate circuit (13) is connected with the signal output part of described sound transducer (19); The second acceleration signal output terminal of Accelerator Feedback module (7) is connected with the first data-signal input end of data collecting card (12); First signal output part of voice signal modulate circuit (13) is connected with the second data-signal input end of data collecting card (12); The data-signal of data collecting card (12) inputs or outputs end and is connected with the data-signal output or the input end of industrial computer (11); The control signal of described industrial computer (11) inputs or outputs end and is connected with the control signal output or the input end of intelligent control module (1) by computer interface circuit (10).
3. the pick-up unit of the remainder of sealed electronic element based on random vibration according to claim 2, it is characterized in that it also comprises display (16), the shows signal input end of described display (16) is connected with the shows signal output terminal of industrial computer (11).
4. the pick-up unit of the remainder of sealed electronic element based on random vibration according to claim 3, it is characterized in that it also comprises loudspeaker (14) and oscillograph (15), the voice signal input end of described loudspeaker (14) is connected with the audio signal output terminal of voice signal modulate circuit (13); The waveform signal input end of oscillograph (15) is connected with the waveform signal output terminal of voice signal modulate circuit (13).
5. the pick-up unit of the remainder of sealed electronic element based on random vibration according to claim 4, it is characterized in that it also comprises keyboard (8) and display screen (9), the Keyboard Control signal output part of described keyboard (8) is connected with the Keyboard Control signal input part of intelligent control module (1), and the shows signal input end of display screen (9) is connected with the shows signal output terminal of intelligent control module (1).
6. the pick-up unit of the remainder of sealed electronic element based on random vibration according to claim 5 is characterized in that data collecting card (12) is twin-channel data collecting card.
7. according to the pick-up unit of claim 1,2,3,4,5 or 6 described remainder of sealed electronic element based on random vibration, the model that it is characterized in that shaking table (6) is M230 or M230R.
8. according to the pick-up unit of claim 1,2,3,4,5 or 6 described remainder of sealed electronic element based on random vibration, it is characterized in that intelligent control module (1) is that model is 32 ARM single-chip microcomputers of STM32F103.
9. according to the pick-up unit of claim 1,2,3,4,5 or 6 described remainder of sealed electronic element based on random vibration, it is characterized in that waveform generation module (2) is FPGA.
10. based on the detection method of the remainder of sealed electronic element of the random vibration of the pick-up unit of the described remainder of sealed electronic element based on random vibration of claim 1, it is characterized in that it may further comprise the steps:
Step 1, intelligent control module (1) are gathered the acceleration signal of shaking table (6) feedback in real time, and the signal that collects is carried out the A/D conversion, the signal after obtaining to change;
Signal after step 2, the conversion that step 1 is obtained carries out power Spectral Estimation, the picked up signal power spectrum;
Step 3, power spectrum signal and reference spectrum that step 2 is obtained compare, the line frequency spectrum equalization of going forward side by side, the frequency spectrum after the acquisition equilibrium;
Step 4, the drive signal amplitude of adjusting frequency are carried out phase randomization with the power spectrum after the equilibrium, the power spectrum behind the acquisition phase randomization;
Power spectrum behind step 5, the phase randomization that step 4 is obtained carries out inverse Fourier transform, obtains result after the conversion;
The result carries out time-domain randomization and handles after step 6, the conversion that step 5 is obtained, obtains the result that time-domain randomization is handled;
The result that step 7, intelligent control module (1) obtain step 6 sends into D/A switch unit (3) and carries out D/A switch, the result after obtaining to change;
Result after step 8, the conversion that step 7 is obtained sends into waveform generation module (2), the result of waveform generation module (2) after according to described conversion adjusts the output waveform of waveform generation module, described output waveform is behind D/A converting unit (3) and power amplifier module (5), be loaded on shaking table (6), and returning step 1, the remainder of sealed electronic element of finishing random vibration detects automatically.
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| CN112444367A (en) * | 2020-12-18 | 2021-03-05 | 中国工程物理研究院总体工程研究所 | Multi-vibration-table parallel-pushing single-shaft vibration test control method |
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| CN102519576B (en) * | 2011-12-04 | 2014-08-13 | 华东光电集成器件研究所 | Method and device for pre-detecting of particle impact noise detection (PIND) |
| CN102788709B (en) * | 2012-08-09 | 2014-11-05 | 哈尔滨工业大学 | Automatic remainder detection device and method for spaceborne electronic equipment |
| CN102788709A (en) * | 2012-08-09 | 2012-11-21 | 哈尔滨工业大学 | Automatic remainder detection device and method for spaceborne electronic equipment |
| CN102865982A (en) * | 2012-09-12 | 2013-01-09 | 哈尔滨工业大学 | Method for acquiring motion trail of redundancy based on photographing technology in process of detecting redundancy in sealed device |
| CN103728656B (en) * | 2014-01-13 | 2016-02-24 | 哈尔滨工业大学 | A kind of PIND checkout equipment synthesis sensor |
| CN103728656A (en) * | 2014-01-13 | 2014-04-16 | 哈尔滨工业大学 | Synthetic sensor for particle impact noise detection (PIND) device |
| CN108593231A (en) * | 2018-03-28 | 2018-09-28 | 上海宇航系统工程研究所 | Carrier rocket random vibration test condition determination method |
| CN109540435A (en) * | 2018-11-23 | 2019-03-29 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of machinery couples the blade fatigue test system and method for exciting with sound wave |
| CN110728360A (en) * | 2019-10-12 | 2020-01-24 | 联合微电子中心有限责任公司 | Micro-energy device energy identification method based on BP neural network |
| CN111007145A (en) * | 2019-11-22 | 2020-04-14 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Cavity device detection method and device |
| CN112666861A (en) * | 2020-12-15 | 2021-04-16 | 浙江中控技术股份有限公司 | Configurable voltage output device, method and controller based on discrete semiconductor |
| CN112666861B (en) * | 2020-12-15 | 2023-03-31 | 浙江中控技术股份有限公司 | Configurable voltage output device, method and controller based on discrete semiconductor |
| CN112444367A (en) * | 2020-12-18 | 2021-03-05 | 中国工程物理研究院总体工程研究所 | Multi-vibration-table parallel-pushing single-shaft vibration test control method |
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