CN106596035B - A kind of device for the monitoring of wind-tunnel strain gauge balance health status - Google Patents
A kind of device for the monitoring of wind-tunnel strain gauge balance health status Download PDFInfo
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- CN106596035B CN106596035B CN201611117275.9A CN201611117275A CN106596035B CN 106596035 B CN106596035 B CN 106596035B CN 201611117275 A CN201611117275 A CN 201611117275A CN 106596035 B CN106596035 B CN 106596035B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
- G01M9/062—Wind tunnel balances; Holding devices combined with measuring arrangements
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Abstract
The present invention relates to a kind of devices for the monitoring of wind-tunnel strain gauge balance health status, including governor circuit, signal condition Acquisition Circuit, battery charging and discharging electric power management circuit, police instruction circuit, data disaply moudle and battery；The present invention is suitable for the occasion that wind tunnel model installation and balance transportation etc. pursue portability, and volume is minimized in the case where meeting measurement accuracy, does not pursue high-precision；The present invention use embedded system, and use high energy density cells, reduce the dependence to fixed power source, realize it is small, light-weight, be convenient for carrying and use.The present invention by usingJudged, eliminates the demand to high-precision power, ensure that the precision of device within the acceptable range while reducing volume.
Description
Technical field
The present invention relates to a kind of devices for the monitoring of wind-tunnel strain gauge balance health status, belong to wind tunnel experiment field.
Background technology
Wind-tunnel balance refers to being used to support model and measuring aerodynamic size, direction and the effect acted on model
The device of point.The day of corresponding aerodynamic force (torque) is measured using being pasted onto day flat elements and powering on resistance strain gauge as converter
It puts down, referred to as wind-tunnel strain gauge balance.Such balance belongs to precision equipment, the vibratory impulse of transportational process, during installing and using
Percussion etc. easily lead to damage.Health status monitoring, recording balance damage process number are carried out in balance transportation, using process
According to for tracing the balance source of damage and balance being protected to be of great significance.
Balance damage, which is mainly the reasons such as external impacts, sustained overload, causes balance ontology to generate crack or plasticity change
Shape.Therefore, balance health status monitoring is mainly transported by real-time measuring balance, is exported using the load of process and carries out interpretation
And it realizes.
Balance working method is bridge-type strain detecting circuit, and each bridge is made of exciting circuit, response output circuit respectively.
It needs accurate while acquiring exciting circuit voltage, response output circuit voltage, to converse each component values.Balance output letter
Number be tiny signal, need to signal carry out large gain amplification.The most of balance data using HBM companies in wind tunnel test scene
Acquisition system carries out balance signal monitoring.The equipment uses carrier technology, can effectively filter out interference signal, acquisition precision
Height, but volume is big, is not suitable for the roving scenes such as model dismounting, transport.
How to provide a kind of device of light, the portable strain gauge balance health status monitoring of volume is that this field urgently solves
Certainly the technical issues of.
Invention content
It is an object of the invention to overcome the deficiencies of the prior art and provide one kind being used for wind-tunnel strain gauge balance health status
The device of monitoring, it is light-weight, portable, it can be good at meeting wind tunnel test use demand.
The object of the invention is achieved by following technical solution：
A kind of device for the monitoring of wind-tunnel strain gauge balance health status is provided, including governor circuit, signal condition are adopted
Collector, battery charging and discharging electric power management circuit, police instruction circuit, data disaply moudle and battery；
Signal condition Acquisition Circuit includes acquisition balance driving voltage, six component signal of cell voltage and balance, is put
A/D transformation is carried out after big filtering, the A/D data converted are sent to governor circuit；Receive the alarm signal that governor circuit is sent
And it is sent to police instruction circuit；
Battery charging and discharging electric power management circuit controls battery charging and discharging, for the dress of wind-tunnel strain gauge balance health status monitoring
It sets and provides stable power supply power supply with balance；
Governor circuit receiving signal manages the balance driving voltage of Acquisition Circuit outputSix component of cell voltage and balance
SignalAnd it is sent to data disaply moudle, wherein i indicates the component serial number of balance, 6 >=i >=1；It calculatesIts
Middle tjIndicate sampling instant, t0Indicate current time；WhenWhen more than given threshold, output triggering alarm calculatesWhen | k1-k2 | when being more than threshold value, output triggering alarm, n is glide filter
Pixel selecting quantity glide filter pixel selecting quantity；After triggering alarm, governor circuit encourages the balance of moment of alarming preceding 4s and rear 4s
VoltageSix component signal of cell voltage and balanceIt is stored, and will be greater than the component serial number i of the balance of given threshold
It is sent to data disaply moudle；
Police instruction circuit exports sound-light alarm after receiving alarm signal；
Data disaply moudle shows point of driving voltage, cell voltage, six component signal of balance and alarm channel, that is, balance
Measure serial number i.
Preferably,| k1-k2 | the threshold value in six channels is determined respectively by load test.
Preferably, further include shell, shell setting balance socket and balance quick socket, the two are in parallel；The day plug flat
The connection plug welded of the seat for balance is connected directly, and the balance quick socket is used for and the unwelded connection of balance
Line is connected.
Preferably, the governor circuit realizes power supply and the data friendship with signal condition Acquisition Circuit by PC104 buses
Mutually.
Preferably, n takes 100,200 or 300.
Preferably, further include ring type data buffer storage, for obtaining governor circuit by the balance of moment of alarming preceding 4s and rear 4s
Driving voltageSix component signal of cell voltage and balanceData.
The present invention has the following advantages that compared with prior art：
(1) present invention is suitable for the occasion that wind tunnel model installation and balance transportation etc. pursue portability, and essence is measured meeting
Volume is minimized in the case of degree, does not pursue high-precision；The present invention uses embedded system, and uses high-energy density electricity
Pond reduces the dependence to fixed power source, realize it is small, light-weight, be convenient for carrying and use.The present invention by usingJudged, eliminates the demand to high-precision power, ensure that the precision of device exists while reducing volume
In acceptable range.
(2) system that uses of the present invention can independently-powered work, and cruise duration is long, is moved easily under scene and uses.
(3) data acquisition of the present invention uses ring type cache way, and the data of record alarm moment preceding 4s and rear 4s can be effective
Record impact, the data waveform for overloading a period of time before and after the moment, trace convenient for failure cause.
(4) acoustic-optic alarm that uses of the present invention can the timely and effective generation for reminding balance failure, reduce operating personnel
Further destruction to balance.
Description of the drawings
Fig. 1 is present system schematic diagram；
Fig. 2 is present system positive structure schematic；
Fig. 3 is present system side structure schematic diagram；
Fig. 4 is balance status display window parameter declaration of the present invention；
Fig. 5 is present invention actual measurement alarm logging schematic diagram data.
Specific implementation mode
Technical solution of the invention is：Governor circuit of the present invention, signal condition Acquisition Circuit, battery charging and discharging power supply
Manage circuit, police instruction circuit, data disaply moudle, battery and shell.
Signal condition Acquisition Circuit includes acquisition balance driving voltage, six component signal of cell voltage and balance, is put
A/D transformation is carried out after big filtering, the A/D data converted are sent to governor circuit；Receive the alarm signal that governor circuit is sent
And it is sent to police instruction circuit；
Battery charging and discharging electric power management circuit controls battery charging and discharging, for the dress of wind-tunnel strain gauge balance health status monitoring
It sets and provides stable power supply power supply with balance；
Governor circuit receiving signal manages the balance driving voltage of Acquisition Circuit outputSix component of cell voltage and balance
SignalAnd it is sent to data disaply moudle, wherein i indicates the component serial number of balance, 6 >=i >=1；It calculatesIts
Middle tjIndicate sampling instant, t0Indicate current time；WhenWhen more than given threshold, output triggering alarm calculatesWhen | k1-k2 | when being more than threshold value, output triggering alarm, n is glide filter
Pixel selecting quantity glide filter pixel selecting quantity；After triggering alarm, governor circuit encourages the balance of moment of alarming preceding 4s and rear 4s
VoltageSix component signal of cell voltage and balanceIt is stored, and will be greater than the component serial number i of the balance of given threshold
It is sent to data disaply moudle；
Police instruction circuit exports sound-light alarm after receiving alarm signal；
Data disaply moudle shows point of driving voltage, cell voltage, six component signal of balance and alarm channel, that is, balance
Measure serial number i.
Further include shell, balance socket and balance quick socket is arranged in shell, and the two is in parallel；The balance socket be used for and
The connection plug of balance welded is connected directly, and the balance quick socket is connected for the connecting line unwelded with balance.
Governor circuit realizes the power supply and data interaction with signal condition Acquisition Circuit by PC104 buses.
Further include ring type data buffer storage, for obtaining governor circuit by the balance driving voltage of moment of alarming preceding 4s and rear 4sSix component signal of cell voltage and balanceData.
Using embedded computer as the exploitation of software program, operation platform, sent control information to by PC104 buses
Signal condition capture card.Signal condition capture card will be converted to number after the amplification of balance input signal conditioning through 12 bit AD samples
Amount, send back to embedded computer, for computer interpretation by PC104 buses.It is handled through computer interpretation program, by balance six
Component data, excitation power supply data, battery capacity data etc. are shown in display screen.If through program interpretation, impact signal mistake is found
Greatly, balance damages, it will sends out corresponding signal by signal condition capture card, control alarm circuit is alarmed, and will report
It is stored in electronic hard disc with 4 second datas after alarm within 4 seconds before police.Power management module provides for system less than 1% fluctuation
5V power supplys, are managed battery charge and discharge process, are provided simultaneously with battery capacity display function.
The present invention is in view of the above-mentioned problems, design portable balance status monitor device, and equipment is from charged pool, when can be long
Between work, destruction of the monitoring shock loading to balance.By show screen reading can interpretation balance damage whether；Balance is installed
In the process, it if there is the shock loading that transfinites, will be alarmed by acoustooptic, and impact data when alarm are deposited into c and are stored in electricity
Sub-disk subsequently can be read alert data and carry out fault source tracing analysis.
The present invention forms as shown in Figure 1, using embedded computer as the exploitation of software program, operation platform, passes through PC104
Bus sends control information to signal condition capture card.Signal condition capture card by balance input signal conditioning amplify after through 12
Bit AD sample is converted to digital quantity, send back to embedded computer by PC104 buses, for computer interpretation, and is shown in liquid
Brilliant screen.Power management module provides the 5V power supplys less than 1% fluctuation for system, is managed to battery charge and discharge process, together
When have battery capacity display function.
Contour structures of the present invention are shown in Fig. 2, Fig. 3.
A) balance D types socket：In accordance with balance 1-24 needles, power supply is just, power supply is negative, signal just, signal it is negative, the line that 13 needles are vacated
Sequence is welded.
B) balance rapid-assembling/disassembling plug：It is in parallel with D type sockets, balance cable and shape can be carried out by simple auxiliary tool
The connection of state monitor, when for balance cable unwelded plug connection use.Its line sequence in accordance with 1~6 needle be excitation power supply just,
7~12 needles are negative for excitation power supply, 13~24 needles be followed successively by 1~6 channel signal just, signal bear (see Fig. 3).
C) digital independent/mouse-keyboard interface：For grafting mouse, keyboard, USB flash disk.
D) charging socket：It is equipment charge, maximum charging current that 220V chargers or portable charged box, which can be connected,
3000mA。
E) display VGA sockets：For connecting liquid crystal display.
F) electricity the Show Button：For checking battery capacity under non-charged state.
G) battery capacity indication lamp：Indicate charged state when charging, indicating battery electric quantity under non-charged state.
H) power switch：For system switching machine and display switch machine state.
I) alarm lamp：Start process is orange, and booting red green alternately flicker when completing works normally as green, report
Alert state is red.
J) balance status display window：The left side one is classified as 6 channel data of balance, unit mV/V, one row the first row of the right
For driving voltage, the second behavior cell voltage, fifth line is each channel failure state.
K) battery：Using EB595675LU size batteries, battery capacity 3000mAh carries under-voltage protection, overdischarge is protected
Protective function.
L) it powers, charge, peripheral auxiliary circuits：DC-DC regulator circuits provide stable 5V power supplys for mainboard, while being day
It is flat that driving voltage is provided.Charging circuit is used to manage lithium battery charging process and charged state is shown.Other peripheral auxiliary circuits
For alarm buzzer circuit, working condition lamp drive circuit etc..
M) Pc104 mainboards：For the governor circuit of this system, for completing the acquisition of control data collecting card data, alarm carries
Show, the functions such as acquisition and recording alert data.
N) data collecting card：16 channels are single-ended/8 channel Differential Input high reliability data capture cards, carry signal condition
Circuit, each channel can realize 1-1000 software gain adjustables.It is provided simultaneously with 16 railway digital signal input/output functions.
O) it charges：It is attached by charge cable and charge port using 5V (3A) power supply, electricity display lamp will be with 2HZ's
Frequency scintillation, from left to right the number of flashing lamp represent battery capacity.Quickly charging battery finishes, and refers into floating charge state electricity
Show that lamp will be always on, floating charge 2 hours or more battery capacity indication lamp will be extinguished, and charging process is completed.
P) booting uses：Balance plug is plugged, is turned on the power switch, is waited for about 30 seconds, starting-up interface is shown, waits for prompt tone
It finishes, shows each working condition of balance, you can normal use.
Q) balance health status interpretation：LCD screen is shown as the real-time output valve of 6 components, and right side is balance driving voltage,
Cell voltage.If balance channel data Sudden Changing Rate is more than threshold values, buzzer will send out the alarm of " drop ... ", state instruction
Lamp switchs to red and is prompted.
R) it shuts down：Power knob, cutting system power supply are pressed, power supply indicator extinguishes, that is, completes system closedown.
S) alert data is obtained and is analyzed：Display is plugged under open state, USB flash disk is inserted into, copies out alert data, is utilized
MATLAB alert datas analysis program is analyzed.
T) remaining capacity is checked：Under charged state, battery capacity indication lamp is directly observed, if battery capacity indication lamp is extinguished, indicates electricity
Pond is full power state.Non- charged state, which presses electricity display switch, will show battery capacity.
U) alarming threshold value is changed：System C disk threshold.txt document memories are stored up by each channel alarming threshold value, by repairing
Change the document and threshold values modification task can be completed.Setting alarming threshold value is 1.4mV/V at present.
The above, best specific implementation mode only of the invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in,
It should be covered by the protection scope of the present invention.
The content that description in the present invention is not described in detail belongs to the known technology of professional and technical personnel in the field.
Claims (6)
1. a kind of device for the monitoring of wind-tunnel strain gauge balance health status, which is characterized in that including governor circuit, signal tune
Manage Acquisition Circuit, battery charging and discharging electric power management circuit, police instruction circuit, data disaply moudle and battery；
Signal condition Acquisition Circuit includes acquisition balance driving voltage, six component signal of cell voltage and balance, is amplified filter
A/D transformation is carried out after wave, and the A/D data converted are sent to governor circuit；It is concurrent to receive the alarm signal that governor circuit is sent
Give police instruction circuit；
Battery charging and discharging electric power management circuit control battery charging and discharging, for wind-tunnel strain gauge balance health status monitoring device and
Balance provides stable power supply power supply；
Governor circuit receiving signal manages the balance driving voltage of Acquisition Circuit outputSix component signal of cell voltage and balanceAnd it is sent to data disaply moudle, wherein i indicates the component serial number of balance, 6 >=i >=1；It calculatesWherein tjIt indicates
Sampling instant, t0Indicate current time；WhenWhen more than given threshold, output triggering alarm,
It calculatesWhen | k1-k2 | when being more than threshold value, output triggering is alarmed, and n is
Glide filter pixel selecting quantity；When trigger alarm after, governor circuit is by the balance driving voltage of moment of alarming preceding 4s and rear 4sElectricity
Six component signal of cell voltage and balanceIt is stored, and the component serial number i that will be greater than the balance of given threshold is sent to data
Display module；
Police instruction circuit exports sound-light alarm after receiving alarm signal；
Data disaply moudle shows the component sequence of driving voltage, cell voltage, six component signal of balance and channel, that is, balance of alarming
Number i.
2. the device for the monitoring of wind-tunnel strain gauge balance health status as described in claim 1, which is characterized in that
| k1-k2 | the threshold value in six channels is determined respectively by load test.
3. the device for the monitoring of wind-tunnel strain gauge balance health status as described in claim 1, which is characterized in that further include
Balance socket and balance quick socket is arranged in shell, shell, and the two is in parallel；The balance socket is used for and balance has welded
Connection plug is connected directly, and the balance quick socket is connected for the connecting line unwelded with balance.
4. the device for the monitoring of wind-tunnel strain gauge balance health status as described in claim 1, it is characterised in that the master
Control power supply and data interaction of the circuit by PC104 buses realization and signal condition Acquisition Circuit.
5. the device for the monitoring of wind-tunnel strain gauge balance health status as described in claim 1, which is characterized in that n takes
100,200 or 300.
6. the device for the monitoring of wind-tunnel strain gauge balance health status as described in claim 1, which is characterized in that further include
Ring type data buffer storage, for obtaining governor circuit by the balance driving voltage of moment of alarming preceding 4s and rear 4sCell voltage and
Six component signal of balanceData.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611117275.9A CN106596035B (en) | 2016-12-07 | 2016-12-07 | A kind of device for the monitoring of wind-tunnel strain gauge balance health status |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611117275.9A CN106596035B (en) | 2016-12-07 | 2016-12-07 | A kind of device for the monitoring of wind-tunnel strain gauge balance health status |
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| CN106596035B true CN106596035B (en) | 2018-10-09 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111623954B (en) * | 2020-04-30 | 2022-04-12 | 中国航天空气动力技术研究院 | Wind tunnel balance bridge fault detection method |
| CN112504413B (en) * | 2020-11-25 | 2022-03-22 | 西南科技大学 | Full-digitalization conversion method and device for six-component balance bridge detection |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2001208803A (en) * | 2000-01-24 | 2001-08-03 | Advantest Corp | Simulation method for failure of semiconductor integrated circuit, and failure simulator |
| CN101655408B (en) * | 2009-08-28 | 2011-01-26 | 清华大学 | Detection circuit for non-common mode voltage strain bridge signal |
| CN101852585A (en) * | 2010-05-24 | 2010-10-06 | 张博明 | Dynamic strain online acquisition and storage system based on flexible circuit board |
| CN104836542B (en) * | 2015-04-30 | 2018-01-19 | 四川迈迪测控技术有限公司 | A kind of preamplifier and calibration measurement method for wind-tunnel balance signal measurement |
| KR101722394B1 (en) * | 2015-09-07 | 2017-04-03 | 국방과학연구소 | Apparatus and method of internal balance inspection for wind tunnel testing |
| CN105606300B (en) * | 2015-12-21 | 2018-01-26 | 合肥工业大学 | A kind of battery-operated type strains multi-dimension force sensor fault diagnosis system |
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