CN208505583U - A kind of vehicle-mounted optical system environmental load Influencing Mechanism analysis pilot system - Google Patents
A kind of vehicle-mounted optical system environmental load Influencing Mechanism analysis pilot system Download PDFInfo
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- CN208505583U CN208505583U CN201820813241.1U CN201820813241U CN208505583U CN 208505583 U CN208505583 U CN 208505583U CN 201820813241 U CN201820813241 U CN 201820813241U CN 208505583 U CN208505583 U CN 208505583U
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Abstract
The utility model discloses a kind of vehicle-mounted optical system environmental load Influencing Mechanisms to analyze pilot system, including multiple testing equipments, and it is installed on the vehicle-mounted light system test specimen in testing equipment, and it is pasted on the muti-piece foil gauge of vehicle-mounted light system surface of test piece, and be installed on the acceleration transducer of vehicle-mounted light system surface of test piece；The foil gauge and acceleration transducer pass through multi-channel signal acquiring system respectively and are electrically connected to computer；The testing equipment is made of vibration and shock testing system and programmable constant temperature humidity chamber；The vibration and shock testing system includes test shake table, and is hammered into shape with the power of test shake table activity installation；The power hammer is sequentially connected with power mechanism；The vehicle-mounted optical system environmental load Influencing Mechanism of the utility model analyzes pilot system, to explore the precison optical components such as vehicle-mounted optical system interior metal reflecting mirror, glass lens affecting laws under the complex environments load such as vibratory impulse, high/low temperature.
Description
Technical field
The utility model relates to a kind of vehicle-mounted optical system environmental load Influencing Mechanisms to analyze pilot system, belong to vehicle-mounted light
Learn system environments loading effect analysis technical field.
Background technique
Vehicle-mounted optical system is the precision equipment of search, observation and run-home in IT-based warfare, has become weapon
Equip the critical component of fine sight, tracking and comprehensive precision strike；However, since working environment is more severe, it is military
Device equipment performance is become increasingly conspicuous by such environmental effects, especially high-precision optical system, is influenced more by external environment
Acutely.
Extraneous vibration load, which has the pointing accuracy of vehicle-mounted gun sight, to be seriously affected, for example, caused by random vibration it is vehicle-mounted
The high intensity of optical system mechanical structure fatigue damage, optical system structure junction caused by transient impact vibrates answers allergic effect
Power；For another example, when the armored vehicles such as tank fall vehicle accident in the process of moving, moment generates huge shock loading, may
Cause optical system glass lens broken or crack, and impact causes vehicle-mounted optical system interior lens that rigidity occurs
Displacement, and then influence the image quality of optical system.
Compared with dynamic load vibration, temperature loading belongs to static load, and the influence to Performance of Optical System will not be stood
Quarter shows, but the internal stress etc. that temperature loading generates over time also has electro-optical system and seriously affects, major embodiment
In the following aspects: first is that since the thermal expansion coefficient between optical system structure has differences, when environment temperature uniformly becomes
It can cause to generate ess-strain inside optical element when change；Second is that optical glass material heating conduction is poor, it can be in optical element
Internal formation temperature gradient causes eyeglass face shape equidimension structure to change, and then influences image quality；In short, temperature carries
Lotus can make the structural parameters of vehicle-mounted optical system change, and influence the reliability and environmental suitability of equipment；It is therefore desirable to
It is furtherd investigate for Influencing Mechanism of the environmental load to optical system, obtains it and vibrating and the shadow under temperature loading effect
Rule is rung, provides reference for the Optimal Structure Designing and Performance Evaluation of vehicle-mounted gun sight, the environment for improving vehicle-mounted optical system is suitable
Answering property and functional reliability.
Utility model content
A kind of vehicle-mounted optical system environmental load Influencing Mechanism analysis examination that in order to solve the above problems, the utility model proposes
Check system, to explore the precison optical components such as vehicle-mounted optical system interior metal reflecting mirror, glass lens in vibratory impulse, height
Affecting laws under the complex environments load such as low temperature optimize vehicle-mounted optical system structure design.
The vehicle-mounted optical system environmental load Influencing Mechanism of the utility model analyzes pilot system, including multiple tests are set
Vehicle-mounted light system test specimen that is standby, and being installed in testing equipment, and be pasted on the muti-piece of vehicle-mounted light system surface of test piece and answer
Become piece, and is installed on the acceleration transducer of vehicle-mounted light system surface of test piece；The foil gauge and acceleration transducer difference
Computer is electrically connected to by multi-channel signal acquiring system；The testing equipment is by vibration and shock testing system and programmable
Constant temperature humidity chamber composition；The vibration and shock testing system includes test shake table, and is pacified with test shake table activity
The power of dress is hammered into shape；The power hammer is sequentially connected with power mechanism, and power hammer is driven by electric and pneumatic power mechanism, and difference can
It is corresponding to carry out electric vibration testing and the test of pneumatic vertical impact, specifically include impulse wave frequency sweep test, random vibration test and
Transient shock test；The vehicle-mounted light system test specimen passes through the examination that clamp assemblies are fixed on vibration and shock testing system respectively
It tests in shake table and programmable constant temperature humidity chamber, wherein testing stand shake table maximum load 50kg, work top size
500mm × 500mm, vertically, impulse waveform is semisinusoidal, final peak sawtooth, trapezoidal for impact, peak accelerator 150~
5000m/s2, 40~1.5ms of pulse duration, the maximum crash frequency is 100 beats/min；It is 5kN that power, which hammers range into shape, and sensitivity is
4pc/N, it is 220mm that power, which hammers length into shape, and out splice going splice L5, tup material is rubber；Programmable constant temperature humidity chamber temperature model
It encloses: -40 DEG C~150 DEG C, humidity range: 20%RH~98%RH, Temperature and Humidity Control precision: ± 0.5 DEG C；± 3%RH, temperature and humidity
It is evenly distributed: ± 2 DEG C；± 5%RH, warm-up time: when from room temperature to 150 DEG C, about 40 minutes (under no-load condition), when cooling
Between: when from room temperature to -40 DEG C, about 65 minutes (under no-load condition), interior case test section size: 50cm × 60cm × 50cm (W ×
H × D), chamber door: 60cm × 70cm (W × H) is tested, totally 1 fan.
Further, the vehicle-mounted light system test specimen includes the principal reflection mirror of metal material and the optical lens of glass material
Mirror.
Further, the foil gauge is resistance strain gage, is made of resistance wire, substrate, coating and lead；It is described
Foil gauge, bridge-type strain transducer and its peripheral circuit composition are for surface near measuring circuit plate Important Components installation site
The bridge circuit of the horizontal and vertical dynamic strain in dynamic strain and component surface of transverse direction and longitudinal direction itself, can for bridge voltage
In ± 1V, ± 2.5V, ± 5V, the switching of ± 12V stepping, it is 0.1% for bridge voltage precision, is less than for bridge voltage stability
0.05%/hour, for bridge voltage maximum output current 50mA, the Standard resistance range of resistance strain gage is the Ω of 50 Ω~10000, bridge
Road mode uses 1/4 bridge of three-wire system, strains full scale value range are as follows: ± 3000 μ ε, ± 10000 μ ε, ± 30000 μ ε.
Further, the acceleration transducer includes micro piezoelectric acceleration transducer and single vibration piezoelectric sensing
Device；The micro piezoelectric acceleration transducer is installed on primary mirror surface；The single vibration piezoelectric transducer is installed on
In primary mirror surface and test its table top of shake table, it is anti-that micro piezoelectric acceleration transducer can test vehicle-mounted optical system master
Penetrate the response of mirror surface acceleration, transducer sensitivity 0.15pc/ms-2, maximum measurement acceleration is 20000m/s2, frequency model
It encloses for 1-20kHz, weight is only 1g, is installed by bonding method, and outer dimension is φ 6.6 × 7.6, is suitable for small members and shakes
Dynamic measurement.
Further, the multi-channel signal acquiring system includes cabinet, and is installed on the DSP master control mould of cabinet inside
Block, power module, digital sampling and processing, data memory module and wired, radio network data communication module；The machine
Sensor interface, charger interface and Ethernet interface, the control of multi-channel signal acquiring system are provided on its cabinet of case
Communication modes have 3 kinds, and seamless switching operating mode may be implemented comprising wired, the nothing of off-line working and on-line working
Line communication；Off-line working uses Manual line prosecutor formula, can pass through dedicated wire-controlled apparatus or panel button manual control data
Acquisition works with data recording program, and the acquisition parameter of equipment can continue to use last time and configure in actual work, is suitable for space
Not enough, understaffed experimental test occasion；On-line working need to be carried out in the case where computer is in communication state with main control module, packet
Wired network communication and wireless communication both of which are included, it can be achieved that the work of data acquisition process equipment is arranged in computer remote
Make parameter, real-time display and storing data, convenient for using under the hazardous environments such as new-type weapon and equipment test or ball firing.
Still further, the DSP main control module includes TMS320C6720 module and its peripheral circuit, TMS320C6720
Module has the ability of powerful data processing and high-speed computation, which is based on FPGA technology and carries out hardware design, and passes through plate
The various functions that twoport IDT7132-RAM program storage realizes DSP are carried, including controlling the acquisition of sensor signal, handling, deposit
Storage, and operation is interacted with functional modules such as communication, power management and man-machine interfaces；To the functional programming of DSP using C++
Language, DSP main program is mainly realized and the data exchange of sampling A/D chip AD7767, completes the high-speed transfer of sampled data；It completes
The various hardware configurations of sampling channel；It completes that the initialization of network transmission module, Ethernet, wireless network data packet are sent and connect
The operation such as receipts；The power module by mains charger, lithium battery management module, numerical portion power supply, analog portion power supply and
Power conversion module is constituted, lithium battery management module, and can manage power module is that (DSP main control module contains SD to digital circuits section
Card) it powers with artificial circuit part (signal processing module), guarantee that system operates normally, power module can be acquiring and processing device
Offer ± 1V, ± 2.5V, ± 5V, ± 12V DC power supply；Once electric quantity of lithium battery is finished, charger can be used to access 220V/
The city 50Hz supplies electricity to the charging of the lithium battery inside acquiring and processing device, lithium battery parameter: nominal value 7.2V, 7000mA；The electricity
Source conversion module is made of LM317LZ power conversion chip and its peripheral circuit；The digital sampling and processing is only by eight groups
Vertical A/D converter and matched live signal conditioning system are constituted；The AD7767 that the A/D converter is 14 samples core
Piece, digital sampling and processing are made of 8 channels, and every channel is all made of independent A/D converter and matched live signal
Conditioning system realizes multi-channel synchronous parallel sampling, and sampling rate is not limited by port number, interchannel without cross talk effects, and
The storage and remote transmission of acquisition data are realized under the control of the dsp；Data acquisition module leads to according to the difference of sensor type
It crosses and matches corresponding suitable tune device, can be used for the measurement of multiple sensors signal, including acceleration transducer and bridge-type strain sensing
Device；Output voltage full scale value range: ± 0.1V, ± 0.3V, ± 1V, ± 3V, ± 10V；The analog signal of sensor acquisition enters
It after signal handling equipment, first passes around preamplifier and is further amplified, signal is after amplifier amplifies, to prevent interference from believing
Number influence, need to be filtered the analog signal of acquisition, this module device using simulation combined with number principle devise it is low
Bandpass filter farthest retains useful signal, removes interference signal；Signal accesses A/D converter after filtering, by mould
Quasi- signal is converted into digital signal, and A/D converter selects 14 AD7767 sampling A/D chips, maximum analysis bandwidth 100kHz, dynamic
Range reaches 96dB；After signal is converted into digital signal by analog signal, then by master control system deposit SD card, meanwhile, it adopts every time
After the completion of collection, data can also be directly transferred to collecting computer by network interface；The data memory module includes by SLC
SD card made of NAND Flash can meet the severe embedded system application design requirement such as weapons equipment test, temperature range
It is -40 DEG C to 80 DEG C, capacity 8G, peak data transmission speed 66.6MB/s；Its communication of the cable network data communication module
Interface is RTL8139D module, through RJ45 interface cable and calculates mechatronics by 20F001N module, user is available
Computer is connect by RJ45 interface cable with signal acquisition process equipment, by the way that computer cable network IP address is arranged, is realized
Data between acquisition equipment are transmitted, and with remotely located acquisition parameter and can control the trigger collection of equipment, acquisition termination
And data storage etc.；Described its communication interface of radio network data communication module is RocketM2 network interface, passes through nothing
Line communication antenna and router and Computer Wireless Communication, when work, are first arranged the wireless network IP address of computer, pass through
The realization of Wifi wireless network is connect with acquiring and processing device, remotely located acquisition parameter, and is controlled acquisition and stopped storing with data,
100m is reached using theory communication distance when 7dB antenna, after increasing router, communication distance rises to 200m, meets field
Requirement of the environment such as Artillery experiment to personnel safety.
As preferred embodiment, the cabinet is made of 8060 hard aluminium alloy materials, and surface is applied equipped with anode
Layer, improves the ability of its antistatic and electromagnetism interference.
Further, the computer is made of test modal analysis system and Dynamic Data Acquiring analysis system, test
Modal analysis system uses VC++ Programming, and present system provides two kinds of basic models of not dynamometry and side force method, can be to knot
Structure carries out controllable dynamics excitation, analyzes the intrinsic kinetic characteristics of structure, including the vibration shape and corresponds to each vibration shape
Resonant frequency and description Mode Shape in free response vibration at any time decay speed damping ratio；Dynamic Data Acquiring analysis
The stress-strain test module of system and various bridge type magnetic sensors cooperate, can be to physics such as power, pressure, displacement, speed, accelerations
Amount is accurately tested, and carries out precise measurement to various voltage signals.
Compared with prior art, the vehicle-mounted optical system environmental load Influencing Mechanism of the utility model point
Pilot system is analysed, is rushed to explore the precison optical components such as vehicle-mounted optical system interior metal reflecting mirror, glass lens in vibration
It hits, affecting laws under the complex environments load such as high/low temperature, optimizes vehicle-mounted optical system structure design；And by vehicle-mounted optical system
The vibration of system and temperature loading experimental study, obtained stress of the vehicle-mounted gun sight principal reflection mirror under each oscillating load plus
The ess-strain rule of speed responsive and optical lens under homogeneous temperature field load, sets for the structure optimization of vehicular photoelectric system
Meter provides scientific guidance and test basis.
Detailed description of the invention
Fig. 1 is the system overall technological scheme schematic diagram of the utility model.
Fig. 2 is the system coupling structure schematic block diagram of the utility model.
Fig. 3 is the flow diagram of the vehicle-mounted optical system Modal Experimental Analysis method of the utility model.
Fig. 4 is the flow diagram that the vehicle-mounted optical system sine sweep of the utility model is tested.
Fig. 5 is the flow diagram of the vehicle-mounted optical system random vibration test of the utility model.
Fig. 6 is the flow diagram of the vehicle-mounted optical system impact test of the utility model.
Fig. 7 is the flow diagram of the vehicle-mounted optical system thermocycling of the utility model.
Fig. 8 is the modal test measuring point distribution map of the utility model.
Fig. 9 is the first six first order mode figure of the principal reflection mirror of the utility model.
Figure 10 is the sine sweep target spectrogram of the utility model.
Figure 11 is the X-direction sine sweep transmission characteristic curve of the utility model.
Figure 12 is the Y-direction sine sweep transmission characteristic curve of the utility model.
Figure 13 is the Z-direction sine sweep transmission characteristic curve of the utility model.
Figure 14 is the random vibration power spectral density response curve of the principal reflection mirror measuring point of the utility model.
Figure 15 is the stress response curve of the measuring point of the utility model.
Figure 16 is that the thermal strain of the utility model measures pilot system connection schematic diagram.
Figure 17 is 20 DEG C~50 DEG C of the strain curve of the utility model.
Figure 18 is 20 DEG C~50 DEG C of the stress curve of the utility model.
Figure 19 is that each batch sensor of the utility model bonds measuring point number figure.
Figure 20 is the first six rank intrinsic frequency of the principal reflection mirror of the utility model and damping figure.
Figure 21 is the sine sweep load-up condition figure of the utility model.
Figure 22 is the Random Vibration Load information drawing of the utility model.
Figure 23 is the shock loading information drawing of the utility model.
Each component mark in attached drawing are as follows: 1- multi-channel signal acquiring system, 11-DSP main control module, 12- power module,
13- digital sampling and processing, 14- data memory module, 15- cable network data communication module, 16- wireless network data
Communication module, 2- computer, 21- test modal analysis system, 22- Dynamic Data Acquiring analysis system, 3- vibration and impact examination
Check system, 31- test shake table, 4- programmable constant temperature humidity chamber, 5- principal reflection mirror, 6- optical lens, 7- foil gauge,
71- principal reflection mirror foil gauge, 72- working strain gauge, 73- supplement foil gauge, 8- acceleration transducer, and 81- micro piezoelectric adds
Velocity sensor, 82- single vibration piezoelectric transducer.
Specific embodiment
Vehicle-mounted optical system environmental load Influencing Mechanism as depicted in figs. 1 and 2 analyzes pilot system, including multiple tests
Equipment, and the vehicle-mounted light system test specimen being installed in testing equipment, and it is pasted on the muti-piece of vehicle-mounted light system surface of test piece
Foil gauge 7, and it is installed on the acceleration transducer 8 of vehicle-mounted light system surface of test piece；The foil gauge and 7 acceleration sensings
Device 8 is electrically connected to computer 2 by multi-channel signal acquiring system 1 respectively；The testing equipment is by vibration and shock testing system
System 3 and programmable constant temperature humidity chamber 4 form；The vibration and shock testing system 3 include test shake table 31, and with examination
Test the power hammer (not shown) of 31 activity installation of shake table；The power hammer is sequentially connected with power mechanism；The vehicle-mounted light system
Test specimen passes through the test shake table and programmable constant temperature and moisture test that clamp assemblies are fixed on vibration and shock testing system respectively
In case 4.
The vehicle-mounted light system test specimen includes the principal reflection mirror 5 of metal material and the optical lens 6 of glass material.
The foil gauge 7 is resistance strain gage, is made of resistance wire, substrate, coating and lead；The foil gauge,
Bridge-type strain transducer and its peripheral circuit composition for measuring circuit plate Important Components installation site nearby surface laterally and
The bridge circuit of longitudinal horizontal and vertical dynamic strain of dynamic strain and component surface itself.
The acceleration transducer 8 includes micro piezoelectric acceleration transducer 81 and single vibration piezoelectric transducer 82；
The micro piezoelectric acceleration transducer 81 is installed on 5 surface of principal reflection mirror；The single vibration piezoelectric transducer 82 is installed
In on 5 surface of principal reflection mirror and test its table top of shake table 31.
The multi-channel signal acquiring system 1 includes cabinet, and is installed on DSP main control module 11, the power supply of cabinet inside
Module 12, digital sampling and processing 13, data memory module 14 and wired, radio network data communication module 15,16；Institute
It states and is provided with sensor interface, charger interface and Ethernet interface on its cabinet of cabinet.
The DSP main control module 11 includes TMS320C6720 module and its peripheral circuit；
The power module 12 by mains charger, lithium battery management module, numerical portion power supply, analog portion power supply and
Power conversion module is constituted；The power conversion module is made of LM317LZ power conversion chip and its peripheral circuit；
The digital sampling and processing 13 is by eight groups of independent A/D converters and matched live signal conditioning system structure
At；The AD7767 sampling A/D chip that the A/D converter is 14；
The data memory module 14 includes the SD card made of SLC NAND Flash；
Described its communication interface of cable network data communication module 15 is RTL8139D module, passes through 20F001N module
Through RJ45 interface cable and calculate mechatronics；
Described its communication interface of radio network data communication module 16 is RocketM2 network interface, by wireless communication
Antenna and router and Computer Wireless Communication.
The cabinet is made of 8060 hard aluminium alloy materials, and surface is equipped with anodic coating.
The computer 2 is made of test modal analysis system 21 and Dynamic Data Acquiring analysis system 22.
The implementation of the vehicle-mounted optical system environmental load Influencing Mechanism analysis test of the utility model, including test preparation,
Test implementation, test report three parts；
(1) test prepares:
1, according to cannon, the vehicle-mounted sight collimation device of tank class weaponry, vehicle-mounted laser rangefinder etc. is tested, test is selected
Object；
2, according to test needs, corresponding measuring point is selected in the corresponding component surface of selected optical system, installation acceleration passes
Sensor or foil gauge；
3, using signal cable special and corresponding conditioner, by each road vibratory impulse response signal or strain-responsive signal
Output is connected with the input of signal acquisition process equipment；
4, the network connection between Portable Reinforced Computer and multiplexed signal sampling processing equipment is established；Manual line traffic control
When, sampling parameter, starting samples storage are directly configured by signal acquisition process equipment line traffic control panel；It is first sharp when wire communication
Equipment Ethernet interface is connected with computer network interface with signal transmssion line (length is not more than 50m), then opens data and adopts
Collect processing equipment, after waiting " connection ", " communication " and " sampling " indicator light to go out, the system monitoring analysis opened in computer is soft
Part inputs the IP address with acquisition equipment phase same network segment, completes the setting of Computer IP address, realizes at computer and data acquisition
Manage the cable network connection of equipment；When wireless communication, communication antenna is first installed to signal acquisition process equipment the corresponding interface,
Simultaneously ensure that wireless computer network is in the open state, remaining step is similar with wire communication, waiting " connection ", " communication " and
After " sampling " indicator light goes out, the system monitoring opened in computer analyzes software, inputs the IP with acquisition equipment phase same network segment
The wireless network connection of computer and data acquisition process equipment is realized in address.
(2) test is implemented:
1, as shown in figure 3, being provided with 34 measuring points in primary mirror surface when modal test, choosing measuring point 28 is reference
Point, every batch of use 6 acceleration transducers to acquire simultaneously the time domain of 6 measuring points, (the 7th batch has surveyed 4 to frequency domain response signal
Point)；
2, as shown in figure 4, respectively arranging 1 measuring point in primary mirror surface and shake table when sine sweep is tested, make simultaneously
The spectrum signal of two measuring points is acquired with two acceleration transducers, the direction that transformative transducer is pasted measures x, y, z three altogether
The transmission characteristic curve in direction；
3, as shown in figure 5, random vibration test arranges that 5 measuring points, shake table arrange 1 measuring point in primary mirror surface,
It is bent to obtain 6 measuring point random vibration power spectral density responses for the signal for measuring 6 measuring points using 6 acceleration transducers simultaneously
Line.
4, as shown in fig. 6, impact test arranges 6 measuring points in primary mirror surface, while 6 foil gauge measurements 6 being utilized
The signal of a measuring point obtains the stress response curve of 6 measuring points, and foil gauge is lateral respectively, longitudinal direction is pasted onto principal reflection mirror table
Face, as principal reflection mirror foil gauge 71；
5, as shown in fig. 7, thermocycling respectively arranges 1 measuring point on glass lens surface and compensating plate surface, i.e., in glass
A foil gauge, including working strain gauge 72 and supplement foil gauge 73 are respectively pasted in glass lens surface and compensating plate surface, while utilizing 2
A foil gauge measures the signal of 2 measuring points, obtains the strain differential and stress difference response curve of 2 measuring points；
(3) test assessment:
By the vibration and temperature loading experimental study of vehicle-mounted optical system, vehicle-mounted gun sight principal reflection mirror has been obtained each
The ess-strain rule of stress, acceleration responsive and optical lens under homogeneous temperature field load under a oscillating load, is vehicle
The Optimal Structure Designing for carrying electro-optical system provides scientific guidance and test basis.
The vehicle-mounted optical system environmental load Influencing Mechanism of the utility model analyzes its analysis method of pilot system, utilizes examination
It tests model analysis, sine sweep test, random vibration test and transient shock test and obtains metal principal reflection mirror in optical system
Dynamic response, using thermocycling obtain glass lens thermal response, analyze varying environment load to vehicle-mounted optical system
The influence of system, to explore environmental load to the affecting laws of optical element；Itself specific steps are as follows:
Modal test: step 1 carries out Modal Experimental Analysis to optical system principal reflection mirror first, test is using not dynamometry
Method test, extracts structural natural frequencies, the vibration shape and the damping of principal reflection mirror；It is motivated in test using hammer stimulating simulated environment,
To obtain the response of upper frequency, stainless steel tup is selected to apply arbitrary excitation, the response of measurement structure each point utilizes software
Each point frequency response function data are calculated in frequency response function analysis module；34 measuring points are provided with altogether in primary mirror surface, are had
Body distribution situation is as shown in Figure 8；It is reference point that measuring point 28 is chosen in test, has done 7 batches, every batch of uses 6 sensings simultaneously
Device acquires the signal (the 7th batch has surveyed 4 points) of 6 measuring points, bonds measuring point number as shown in figure 19 for each batch sensor,
It is as shown in figure 20 the first six rank intrinsic frequency and damping, is illustrated in figure 9 the first six first order mode figure of principal reflection mirror；
Step 2, sine sweep test: tested reflecting mirror and frame is fixed on a vibration table by four nuts, according to
It needs to paste piezoelectric transducer in the corresponding site of shake table and reflecting mirror；Using vibration software, load-up condition, such as Figure 21 are set
It show sine sweep load-up condition；Start vibration device, start to test, obtains principal reflection mirror frequency sweep target map and x, y, z
Three direction transmission characteristic curves；It is as shown in Figure 10 sine sweep target spectrogram, is as shown in Figure 11 to Figure 13 X, Y, Z tri-
Direction sine sweep transmission characteristic curve；
Step 3, random vibration test: level is fixedly mounted on mirror holder principal reflection mirror eyeglass upward, random vibration test
5 measuring points are set altogether；Random vibration test is carried out in Z-direction according to test load condition, oscillating load condition is as shown in figure 22, number
Sharing the signal of 5 lane testing different locations according to acquisition instrument, corresponding measuring point is respectively CH1, CH2, CH3, CH4, CH5,
Wherein CH6 is the input signal measuring point of vibration table；It is as shown in figure 14 acquisition 6 measuring point random vibration power spectrum of principal reflection mirror
Density response curve；
Impact test: step 4 chooses 6 test points in primary mirror surface, pastes foil gauge, measure in impact process
Stress value；Shock loading condition is as shown in figure 23；Stress response curve to obtain each measuring point as shown in figure 15；
Step 5, thermocycling: subjects are the vehicle-mounted gun sight ocular unit component of certain type, used material
With practical equipment；Using B-711 glue by strain gauge adhesion on needing the eyeglass that measures, then by gun sight eyepiece portion
Part is put into LK-150G programmable constant temperature humidity chamber, and according to the environmental condition of armament-related work, test temperature range is arranged
It is -40 DEG C~50 DEG C, starts computer and strain acquirement software, after temperature reaches requirement and stablizes, starts to acquire data；Point
Not Ce Liang -40 DEG C, -30 DEG C, -20 DEG C, -10 DEG C, 0 DEG C, 10 DEG C, 20 DEG C, 30 DEG C, 40 DEG C, the dependent variable under 50 DEG C of temperature fields,
Obtaining specific temperature, eyeglass dependent variable changes with time rule off field；Pilot system schematic diagram is as shown in figure 16, strains and answers
Power change curve is respectively as shown in Figure 17,18；
This method can analyze response pattern of the vehicle-mounted optical system under all kinds of environmental loads such as vibration, temperature, be vehicle-mounted
The structural design optimization of optical system provides the test data support of science, lays the foundation for weaponry qualification test.
Above-described embodiment is only the better embodiment of the utility model, therefore all according to the utility model patent application range
The equivalent change or modification that the structure, feature and principle is done, is included in the scope of the utility model patent application.
Claims (8)
1. a kind of vehicle-mounted optical system environmental load Influencing Mechanism analyzes pilot system, it is characterised in that: set including multiple tests
Vehicle-mounted light system test specimen that is standby, and being installed in testing equipment, and be pasted on the muti-piece of vehicle-mounted light system surface of test piece and answer
Become piece, and is installed on the acceleration transducer of vehicle-mounted light system surface of test piece；The foil gauge and acceleration transducer difference
Computer is electrically connected to by multi-channel signal acquiring system；The testing equipment is by vibration and shock testing system and programmable
Constant temperature humidity chamber composition；The vibration and shock testing system includes test shake table, and is pacified with test shake table activity
The power of dress is hammered into shape；The power hammer is sequentially connected with power mechanism；The vehicle-mounted light system test specimen is fixed by clamp assemblies respectively
In the test shake table and programmable constant temperature humidity chamber of vibration and shock testing system.
2. vehicle-mounted optical system environmental load Influencing Mechanism according to claim 1 analyzes pilot system, it is characterised in that:
The vehicle-mounted light system test specimen includes the principal reflection mirror of metal material and the optical lens of glass material.
3. vehicle-mounted optical system environmental load Influencing Mechanism according to claim 1 analyzes pilot system, it is characterised in that:
The foil gauge is resistance strain gage, is made of resistance wire, substrate, coating and lead；The foil gauge, bridge-type strain pass
The dynamic of sensor and its peripheral circuit composition for surface transverse direction and longitudinal direction near measuring circuit plate Important Components installation site
The bridge circuit of strain and the horizontal and vertical dynamic strain in component surface itself.
4. vehicle-mounted optical system environmental load Influencing Mechanism according to claim 1 analyzes pilot system, it is characterised in that:
The acceleration transducer includes micro piezoelectric acceleration transducer and single vibration piezoelectric transducer；The micro piezoelectric
Acceleration transducer is installed on primary mirror surface；The single vibration piezoelectric transducer is installed on primary mirror surface and test
On its table top of shake table.
5. vehicle-mounted optical system environmental load Influencing Mechanism according to claim 1 analyzes pilot system, it is characterised in that:
The multi-channel signal acquiring system includes cabinet, and is installed on the DSP main control module, power module, data of cabinet inside and adopts
Collect processing module, data memory module and wired, radio network data communication module；Biography is provided on its cabinet of the cabinet
Sensor interface, charger interface and Ethernet interface.
6. vehicle-mounted optical system environmental load Influencing Mechanism according to claim 5 analyzes pilot system, it is characterised in that:
The DSP main control module includes TMS320C6720 module and its peripheral circuit；The power module is by mains charger, lithium electricity
Pond management module, numerical portion power supply, analog portion power supply and power conversion module are constituted；The power conversion module by
LM317LZ power conversion chip and its peripheral circuit are constituted；The digital sampling and processing is by eight groups of independent A/D converters
And matched live signal conditioning system is constituted；The AD7767 sampling A/D chip that the A/D converter is 14；The data storage
Module includes the SD card made of SLC NAND Flash；Described its communication interface of cable network data communication module is
RTL8139D module through RJ45 interface cable and calculates mechatronics by 20F001N module；The wireless network data is logical
Letter its communication interface of module is that RocketM2 network interface, by wireless communication antenna and router and computer radio are logical
Letter.
7. vehicle-mounted optical system environmental load Influencing Mechanism according to claim 5 analyzes pilot system, it is characterised in that:
The cabinet is made of 8060 hard aluminium alloy materials, and surface is equipped with anodic coating.
8. vehicle-mounted optical system environmental load Influencing Mechanism according to claim 1 analyzes pilot system, it is characterised in that:
The computer is made of test modal analysis system and Dynamic Data Acquiring analysis system.
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| CN108593268A (en) * | 2018-05-25 | 2018-09-28 | 中国人民解放军陆军工程大学 | A kind of vehicle-mounted optical system environmental load Influencing Mechanism analysis method and its pilot system |
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Cited By (1)
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| CN108593268A (en) * | 2018-05-25 | 2018-09-28 | 中国人民解放军陆军工程大学 | A kind of vehicle-mounted optical system environmental load Influencing Mechanism analysis method and its pilot system |
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