CN207610813U - Negative step force generating system, thrust measurement dynamic characteristic caliberating device - Google Patents
Negative step force generating system, thrust measurement dynamic characteristic caliberating device Download PDFInfo
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- CN207610813U CN207610813U CN201721797346.4U CN201721797346U CN207610813U CN 207610813 U CN207610813 U CN 207610813U CN 201721797346 U CN201721797346 U CN 201721797346U CN 207610813 U CN207610813 U CN 207610813U
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Abstract
The utility model belongs to laboratory dynamic thrust sensor element testing field more particularly to a kind of negative step force generating system, thrust measurement dynamic characteristic caliberating device.Negative step force generating system is mainly used for, when thrust-measuring device is verified for the first time with periodic calibration, proven ladder-like power being supplied to dynamometric system.The loop line of electro-mechanical circuit interrupter is blown with current impulse, ensures that the standard test weight of dynamic calibration is quickly controllable and under throwing, is formed in the recordable standard test weight cut-off signal of data processing unit in the form of electromechanical.Can ensure dynamic calibration standard force source quickly it is controllable in the form of electromechanical throw under, signal gathering unit simultaneously acquire loop line fusing the moment voltage signal, can effectively ensure that the accuracy of negative step force value.
Description
Technical field
The utility model belongs to laboratory dynamic thrust sensor element testing field, more particularly to a kind of for dynamic push
The negative step force generating system of force measuring device calibration and the calibration thrust-measuring device that step force generating system is born with this are dynamic
The caliberating device and method of step response.
Background technology
In space industry, attitude control engine usually works in a pulsed fashion in space, and the thrust of generation is to hold for a string
Not equal impulsive force of continuous time, for being corrected promptly and accurately, pulse when there are attitude offsets to spacecrafts such as satellites
Width second is differed from several milliseconds to tens.When carrying out ground altitude simulation test run, need accurately to carry using Thrust Measuring System
For the dynamic thrust technical indicator of attitude control engine, Thrust Measuring System will have higher dynamic response characteristic, measurement frequency
Range will cover attitude control engine impulse force frequency range, can pass to attitude control engine impulse force signal without distortion
Acquisition system, signal acquiring system need corresponding sample frequency recording pulse signal.
In engine impulse Thrust Measuring System, thrust-measuring device is very important component part, thrust measurement dress
Can the height that dynamic characteristic be set directly influence the impulse force signal that measure engine without distortion.Usual thrust measurement
The Dynamic Signal of device is complex, and influence factor is more, is accurately retouched to its dynamic characteristic using the method for theoretical calculation
It states that there are certain difficulties, therefore just needs the pumping signal (including step signal, pulse signal and periodic signal) of standard right
Thrust-measuring device is acted on, and is studied its dynamic characteristic by exporting response.
Utility model content
The purpose of this utility model is to provide a kind of negative step force generating system for the calibration of dynamic thrust measuring device,
For supplying proven ladder-like power to dynamometric system input terminal when thrust-measuring device is verified for the first time with periodic calibration, and
The dynamic characteristic of pressure sensor is studied in laboratory using the covering device.
The technical solution of the utility model is to provide a kind of negative step force generating system, is characterized in that：Packet
Include power module and capacitor module；
Above-mentioned power module includes power supply and power indicating circuit；Above-mentioned capacitor module include capacitator charging circuit,
Discharge circuit and Zapping circuit；
Power output end is connect with the input terminal of power indicating circuit and capacitator charging circuit respectively；
Above-mentioned power indicating circuit includes that the first resistor R1 being sequentially connected in series and the second light emitting diode D2, above-mentioned power supply are defeated
Outlet is connect with the input terminal of first resistor R1, the output end ground connection of the second light emitting diode D2；
Above-mentioned capacitator charging circuit include charge switch S1 and with the concatenated charging parallel circuit of charge switch；
Above-mentioned charging parallel circuit includes charging indication and charging circuit parallel with one another；
Above-mentioned charging indication includes third diode D3,3rd resistor R3 and the 4th light emitting diode being sequentially connected in series
The input terminal of D4, above-mentioned third diode D3 are connect with the output end of charge switch S1, the output end of the 4th light emitting diode D4
Ground connection；
Above-mentioned charging circuit includes the first diode D1, the 4th resistance R4 and the shunt capacitance group being sequentially connected in series, and above-mentioned
The input terminal of one diode D1 is connect with the output end of charge switch S1, the low-pressure end ground connection of shunt capacitance group；
The input terminal of above-mentioned discharge circuit is connected to the high-pressure side of shunt capacitance group, and above-mentioned discharge circuit includes parallel with one another
Electric discharge indicating circuit and discharge switch control circuit；Above-mentioned electric discharge indicating circuit include the 5th diode D5 being sequentially connected in series,
6th light emitting diode D6 and the 5th resistance R5, above-mentioned electric discharge indicating circuit further include the 6th resistance R6 and the 7th resistance R7, on
It states the 6th resistance R6 to connect with the output end of the 5th resistance R5 with one end of the 7th resistance R7, above-mentioned 6th resistance R6's is another
End is connect with the output end of power supply, the other end ground connection of above-mentioned 7th resistance R7；Above-mentioned discharge switch control circuit includes successively
The output end of concatenated discharge switch S3 and the 8th resistance R8, the 8th resistance R8 are grounded；
Above-mentioned Zapping circuit is in parallel with discharge switch control circuit, including the 7th diode D7 and thyristor being sequentially connected in series
The output end of Q1, above-mentioned 7th diode D7 are connect with the anode of thyristor Q1, and the cathode of above-mentioned thyristor Q1 connects a loop line
Binding post, another loop line binding post ground connection；The control terminal of above-mentioned thyristor Q1 by second resistance R2 and trigger switch S2 with
The output end of power supply connects.
Preferably, the 7th both ends diode D7 in Zapping circuit are equipped with signal output end, for measuring fusing moment electricity
Press signal.
Preferably, above-mentioned shunt capacitance group is that capacitance C1 and capacitance C2 is parallel with one another；
Above-mentioned first resistor R1,3rd resistor R3, the 6th resistance R6, the 7th resistance R7 resistance value be 6.2K Ω, it is above-mentioned
4th resistance R4 is the power resistor that power is 5w, and the resistance value of above-mentioned 5th resistance R5 is 1K Ω, the resistance of above-mentioned 8th resistance R8
Value is 100 Ω, and the resistance value of above-mentioned second resistance R2 is 240 Ω；First diode D1, third diode D3, the 5th diode D5
It is IN4007 series, the 7th diode D7 is IN5048.
Preferably, it further includes remote control module that the utility model, which bears step force generating system, and above-mentioned remote control module is for controlling
The opening and closing of charge switch S1, discharge switch S3 and trigger switch S2.
The utility model also provides a kind of caliberating device of thrust measurement dynamic characteristic, is characterized in that：Including upper
Negative step force generating system, two sections of fused wires, dynamometric system, signal gathering unit and the data processing unit stated；
Above-mentioned dynamometric system includes sensor fastening device, the electron-amplifier being connect with sensor to be measured and passes through loop line
The power source of load on a sensor；
One end of two sections of fused wires is separately fixed on loop line binding post, and the other end and the loop line of two sections of fused wires connect
It touches；
The output end of electron-amplifier and the signal output end of negative step force generating system are connect with signal gathering unit；
The output end of signal gathering unit is connect with data processing unit.
Preferably, the caliberating device of the utility model thrust measurement dynamic characteristic further includes fused wire fixing device, on
It includes support portion and fixed part to state fused wire fixing device, and fixation portions can be realized along support portion and be moved up and down,
Fixation portions is equipped with the fixture of fixed fused wire.
Preferably, the caliberating device of the utility model thrust measurement dynamic characteristic further includes force transfer mechanism, and above-mentioned power passes
It includes fixed seat, supporting rod and fixed pulley to pass mechanism, and one end of above-mentioned supporting rod is fixed in fixed seat, the other end of supporting rod
Fixed fixed pulley, supporting rod have certain angle with horizontal plane.
Preferably, above-mentioned power source is the object of the standard test weight either corrresponding quality through measurement.
Preferably, above-mentioned signal gathering unit uses the data collecting card of NI.
The utility model also provides a kind of scaling method using above-mentioned thrust measurement dynamic characteristic, including following step
Suddenly：
Step 1：Tested sensor is fixed on sensor fastening device, power source is loaded by loop line and is passed tested
On sensor, one end of fused wire is fixed on loop line binding post, the other end is contacted with loop line；
Step 2：According to the parameter setting signal gathering unit and data processing unit relevant parameter of tested sensor；
Step 3：To the power supply power supply of negative step force generating system；
Step 4：It is closed the charge switch for bearing step force generating system, gives capacitor charging, when the voltage of capacitance is more than 12V,
4th light emitting diode (D4) gradually brightens, and persistently charges 45-60 seconds, and capacitor charging is completed；
Step 5：After charging complete, charge switch is disconnected；
Step 6：It is closed discharge switch and trigger switch, loop line is fused；
Step 7：After the completion of fusing, break trigger switch makes capacitance discharge, when the 6th light emitting diode (D6) extinguishes,
Capacitance electric discharge is completed；
Step 8：Different power sources is replaced, repeats step 1 to step 7, signal gathering unit acquires corresponding voltage letter
Number, obtain the dynamic characteristic of measurand through data processing unit.
The utility model has the beneficial effects that：
1, the utility model bears the current impulse of step force generating system and the loop line of electro-mechanical circuit interrupter fuses, and can ensure
The standard force source of dynamic calibration quickly it is controllable thrown in the form of electromechanical under, signal gathering unit acquires loop line and fuses the moment simultaneously
Voltage signal, can effectively ensure that the accuracy of negative step force value；
2, the utility model patent structure is simply novel, and data handling procedure is simple.
Description of the drawings
Fig. 1 is that step force generating system circuit diagram is born in embodiment；
Fig. 2 is the caliberating device schematic diagram of thrust-measuring device dynamic characteristic in embodiment；
Fig. 3 is the caliberating device functional block diagram of thrust-measuring device dynamic characteristic in embodiment；
Fig. 4 is force transfer mechanism schematic diagram in embodiment；
Fig. 5 a are capture card pin left view in embodiment；
Fig. 5 b are capture card pin right view in embodiment.
Reference numeral is in figure：1- sensor fastening devices, 2- sensors to be measured, 3- electron-amplifiers, 4- power source, 5- are molten
Disconnected conducting wire, 6- loop lines, 7- bear step force generating system, 8- signal gathering units, 9- data processing units；
21- fixed seats, 22- supporting rods, 23- fixed pulleys.
Specific implementation mode
The utility model is further described below in conjunction with drawings and the specific embodiments.
It will be seen from figure 1 that it includes power module and capacitor module that the present embodiment, which bears step force generating system,；
Power module includes power supply and power indicating circuit；Capacitor module includes capacitator charging circuit, discharge circuit
And Zapping circuit；
Power output end is connect with the input terminal of power indicating circuit and capacitator charging circuit respectively；
Power indicating circuit includes the first resistor R1 being sequentially connected in series and the second light emitting diode D2, power output end and
The input terminal of one resistance R1 connects, the output end ground connection of the second light emitting diode D2；
Capacitator charging circuit include charge switch S1 and with the concatenated charging parallel circuits of charge switch S1；
Charging parallel circuit includes charging indication and charging circuit parallel with one another；
Charging indication includes third diode D3,3rd resistor R3 and the 4th light emitting diode D4 being sequentially connected in series,
The input terminal of third diode D3 is connect with the output end of charge switch S1, the output end ground connection of the 4th light emitting diode D4；
Charging circuit includes the first diode D1, the 4th resistance R4 and the shunt capacitance group being sequentially connected in series, the first diode
The input terminal of D1 is connect with the output end of charge switch S1, the low-pressure end ground connection of shunt capacitance group C；
The input terminal of discharge circuit is connected to shunt capacitance group high-pressure side, and discharge circuit includes that electric discharge parallel with one another indicates
Circuit and discharge switch control circuit；The indicating circuit that discharges includes the 5th diode D5, the 6th light emitting diode being sequentially connected in series
D6 and the 5th resistance R5, electric discharge indicating circuit further includes the 6th resistance R6 and the 7th resistance R7, the 6th resistance R6 and the 7th resistance
One end of R7 is connect with the output end of the 5th resistance R5, and the other end of the 6th resistance R6 is connect with power output end, the 7th electricity
Hinder the other end ground connection of R7；Discharge switch control circuit includes the discharge switch S3 and the 8th resistance R8 being sequentially connected in series, the 8th electricity
Hinder the output end ground connection of R8；
Zapping circuit is in parallel with discharge switch control circuit, including the 7th diode D7 and thyristor Q1 being sequentially connected in series,
The output end of 7th diode D7 is connect with the anode of thyristor Q1, and the cathode of thyristor Q1 connects a loop line binding post, another
A loop line binding post ground connection；The control terminal of thyristor Q1 is connected by second resistance R2 and the output end of trigger switch S2 and power supply
It connects.
Negative step force generating system is mainly used for when thrust-measuring device is verified for the first time with periodic calibration, to dynamometric system
Supply proven ladder-like power.The loop line of electro-mechanical circuit interrupter is blown with current impulse, ensures the standard weight of dynamic calibration
Code is quickly controllable under throwing, to be formed in the recordable standard test weight cut-off signal of data processing unit in the form of electromechanical.
As shown in Figure 1, after charge switch connection, capacitor charges negative step force generating system operation principle.It is charging
In the process, charging indicator light (the 4th light emitting diode D4) is shinny, when voltage reaches 12V (value is 50% of peak value or so),
Startup/discharge button gradually brightens, and when button no longer brightens, shows that capacitance group charging finishes, and package unit has been worked well standard
It is standby.It is then turned off charge switch, is closed trigger switch and discharge switch, then has control voltage supply thyristor switch, electric current arteries and veins
Punching will flow through loop line, be fused.
The 7th both ends diode D7 on fusing circuit connect two measuring points, as voltage signal output end, when fusing back
After the conducting of road, the 7th both ends diode D7 will produce potential difference, and after loop line fusing, the 7th diode D7 both end voltages return to zero,
The voltage signal at fusing moment can be obtained by measuring the variation of the 7th diode D7 both end voltages, acquisition is connected to by plug
It is recorded in equipment, to do subsequent analysis.
The concrete structure that step force generating system is born in the present embodiment includes a protection shell, and appearance and size is long x
The wide a height of 235x250x100mm of x carry power cord and Signal plug.There are power switch, switching on the preceding control panel of shell
Switch, charge switch, startup/discharge switch, power supply indicator, charging indicator light, the binding post for connecting loop line.Housing rear fills
Have fusing time-ofday signals out splice going splice (be used for and signal gathering unit connects) and equipment for plug (connect 100~240V, 50
~60Hz alternating currents).It is equipped in shell：24VDC power supplys, charging capacitor/group C, the thyristor that electric current is fed to loop line are controllable
Transwitch, light emitting diode indicator elment and other electronic components.
Step force generating system technical performance index is born in the present embodiment is shown in Table 1：
1 negative step force generating system technical performance index of table
Primary clustering parameter request is as follows in the present embodiment：
(1) power parameter：
A, it exports：DC voltage 24V, rated current 2.2A, rated power 52.8W, voltage adjusting range 21.6~
28.8V；
B, it inputs：100~240VAC of voltage range, 47~63Hz of frequency range；
C, appearance and size：99*82*30mm.
(2) capacitance parameter：
A, use temperature range：- 40 DEG C~+85 DEG C
B, rated voltage：80V
C, rated capacity：39000uF
D, largest ripple current：12A
E, rated capacitance tolerance：± 20% (120H exists ,+20 DEG C)
F, appearance and size：Ф51*130mm.
(3) the silicon-controlled parameter of thyristor
A, forward mean current rating：50A
B, control pole trigger current：100mA
C, maximum stable operating current：30A
D, repetitive peak reverse voltage：200V
(4) resistance parameter
The resistance of several specification is used in circuit
Cement resistor parameter：Nominal resistance 51R, rated power 5W.Fixed carbon resister parameter, nominal resistance have a 6.2K Ω, and 250
Ω, 100 Ω etc..
(5) light emitting diode parameter
Light emitting diode selects the light-emitting diodes of green fluorescent tube here for showing on/off and device charged state
Pipe.
(6) it switchs
What power supply and charge/discharge switch selected two two knives and two three knives respectively selects toggle switch.
The dynamic characteristic of thrust-measuring device is demarcated, it is inadequate that light, which has negative step force generating system, bears step force hair
Raw system is used to generate the ladder-like power of known dimensions, and force transfer mechanism, fused wire fixing device, signal acquisition has also been needed to set
It is standby, data recording equipment, Data Analysis Software and corresponding program etc..
Figure it is seen that the negative step force hair that the caliberating device of the present embodiment thrust-measuring device dynamic characteristic is above-mentioned
7, two sections of fused wires 5 of raw system, dynamometric system, signal gathering unit 8 and data processing unit 9；Dynamometric system includes sensing
Device fixing device 1, the electron-amplifier 3 being connect with sensor 2 to be measured and the power source by the load of loop line 6 on sensor to be measured
4；One end of two sections of fused wires 5 is separately fixed on loop line binding post, and the other end of two sections of fused wires 5 is contacted with loop line 6；
The output end of electron-amplifier 3 and the signal output end of negative step force generating system 7 are connect with signal gathering unit 8；Signal
The output end of collecting unit 8 is connect with data processing unit 9.
Further include force transfer mechanism if when needing to change power source direction, such as Fig. 4, including fixed seat 21, supporting rod 22
And fixed pulley 23, one end of supporting rod 22 are fixed in fixed seat 21, the other end of supporting rod 22 fixes fixed pulley 23, supporting rod
22 have certain angle with horizontal plane.It can also include fused wire fixing device.
By taking the calibration of single force snesor dynamic characteristic as an example, illustrate effect and the operation principle of each corollary equipment：
(1) power source
Power source can be the object of the standard test weight either corrresponding quality through measurement.The present embodiment is suitable using weight
Standard test weight is as calibration power source.Counterweight group total weight is 5Kg.
(2) force transfer mechanism
Because sensor to be measured is to be horizontally mounted in Fig. 2, counterweight installation form does not need other force transfer mechanism,
If the power of counterweight vertical direction is loaded on horizontal load cell, it is necessary to force transfer mechanism.Force transfer mechanism is to set
Certain pulley mechanism is counted as shown in figure 4, vertical power is converted into horizontal loading forces.
(3) fused wire fixing device
Fused wire in the present embodiment is the copper conductor of two roughs, and wire end is welded with copper sleeve.Dynamic calibration process
In copper sleeve is ridden on the loop line being blown, since blister copper conducting wire is flexible circuit conductor, can not oneself fixed position, and loop line
The position to fuse every time is different, also to adjust the position of copper sleeve, so needing a fused wire fixing device for fixing
Blister copper conducting wire and its position is adjusted to adapt to the requirement of different tests.Fused wire fixing device includes support portion and fixed part,
Fixed part can realize along support portion and move up and down that fixed part is equipped with the fixture of fixed fused wire.
(4) signal gathering unit
Sensor is acquired using the data collecting card of NI in the present embodiment and fusing that negative step force generating system is sent out
Moment voltage signal, is transmitted in data processing unit, and parameter, feature are as follows：
Measurement type：Voltage；
Physical interface is USB interface；
8 tunnel simulation inputs, 50KS/ seconds, 16 bit resolutions；
13 number I/O lines, 1 32 digit counter；
It is lightweight, bus-powered, easy to carry；
Easily connection sensor and signal are connected by bolt terminal.
(5) data processing unit
For the convenience of measurement, using laptop as data recording equipment, data processing unit can utilize existing
Some processing softwares can also be write using LabVIEW.
Specific calibration process is as follows：
Negative step force generating system and other experimental facilities installation logical relation are as shown in Figure 3.
One, equipment installation steps：
(1) power load mode is determined according to measurand
If measurand is illustrated in figure 2 a vertically-mounted pull pressure sensor, the counterweight of calibration can directly be hung
At sensor lower stress end.Fusing is leaned against with the copper sleeve of heavy gauge wire end on the fine copper wire (loop line) being blown；
If the sensor of measurand is to be horizontally mounted, just utilize force transfer mechanism by the weight of the vertical direction of calibrating weight
Power changes into horizontal applied force.Fusing is constant with thick copper lines fixed form.
Note：Other than fusing and testing, capacitance is not discharged and is disconnected after experiment by two loop line binding post short circuits
Power supply.Device use environment should keep drying.
(2) capture card connects
For the capture card that the utility model uses for multifunctional data acquisition card, its energy measurement voltage signal has the simulation of 8 tunnels defeated
Enter, 50KS/ seconds, 16 bit resolutions, sensor and signal are connected by bolt terminal, connect with computer by USB, and by total
Line is powered.
A), measurand and capture card connect
Tested force sensor output signal is generally voltage signal, usually need to be after mating amplifier amplifies signal
Output.Sensor signal exports after amplifier amplifies from amplifier signal delivery outlet, is signally attached to the simulation letter of capture card
Number input port.The fusing time-ofday signals of negative step force generating system output are also directly connected on capture card.
Fig. 5 a and Fig. 5 b are the pin left view and right view of capture card used, and capture card has 8 tunnel simulation inputs, respectively
0~AI of AI 7, when using difference acquisition mode, according to AI 0, AI 4, AI 1, AI 5 wait and so on pairs of connection, so
Most multipotency measures 4 signals in a differential manner simultaneously.Force sensor signals and fusing time-ofday signals all measure in a differential manner.
B), capture card is connect with acquisition computer, that is, data processing unit
Capture card is connect with computer by USB interface.
(3) step force generating system installation is born
Using blister copper conducting wire as fused wire, one end is mounted on the loop line binding post of negative step force generating system, separately
One end is mounted in fused wire fixing device.
The fusing time-ofday signals output that fuse signals output lead plug end is inserted into negative step force generating system behind connects
On head, the other end is connect with capture card simulation input mouth.And connect the power supply electric wire of device.
(4) fused wire fixing device is installed
Fused wire fixing device can adjust the position of blister copper conducting wire up and down, to adapt to be blown fine copper wire position
It sets.Fixing screws are tightened after adjusting good position.
Two, specific calibration process：
By taking the calibration of single force snesor dynamic characteristic as an example, illustrate the operating procedure of package unit.
Step 1：Capture program is set；
The relevant software of data processing unit in acquisition computer is opened, enters data acquisition program interface, the program
Interface is divided into channel setting, sampling setting, record setting, waveform display area and triggering and several parts is arranged.Wherein " triggering is set
Set " it need not be arranged.
Each section setting is as follows：
A), channel is arranged
According to the pin of capture card, the physical channel of selection signal input is inputted if it is mono signal, then selection is corresponding logical
Road.If it is multichannel collecting, multiple channels are clicked.
Channel is chosen, the maximum of voltage measurement, minimum voltage are filled in further according to the range of measured signal.
Then according to physical cabling formal character single channel or differential mode at " terminals configuration ".
B), sampling setting
Sampling setting is mainly sample frequency and hits setting, and default configuration is pressed in sampling clock source.Sample rate is greater than
Or 20 times of the intrinsic frequency equal to measurand, hits is related to the refresh time of the waveform in oscillogram, can be according to the observation
Custom is voluntarily adjusted.
C), record setting
Logging mode " off " is that a monitoring signals are not noted down, and " record and read " is selected then to record collected number
According to, and with TDMS stored in file format, it must select file storage path and the name that fills up a document before recording.
Step 2：Step force generating system is born in operation, realizes fusing operation；
A) after, capture program is set, logging mode is selected as " off " first, and run program, then opens sensor
Whether power supply, observation sensor signal are normal.
B) it is opened after, checking and bears step force generating system power switch, to the power module power supply inside device, electricity
The shinny expression power supply of LED1 green lights of source switch is normal.
C) switching switch, is stirred, switching switch is there are three state, and to disconnect, left side is remote control state, right side for centre
To manually control state.
I. remote control
Remote control control, including tetra- buttons of ABCD can only be used under remote state, wherein " A ", which is charging, opens button, " D "
For the close button that charges, " B ", " C " are start button.
Control flow：
1) A is touched the button first to capacitor charging, and lamp green above charge switch is always at this time, when the voltage of capacitance is more than
12V, LED3 red start button are gradually shinny, and after starting to charge up 45~60 seconds, capacitor charging is basically completed.
2) after charging complete, by lower button D, charge switch, charge closing are disconnected.
3) logging mode of switching capture program is to " record and read ", and runs program, and program start recording is believed at this time
Number.
4) lower button B or C are pressed, discharge switch and trigger switch are closed, carries out fusing operation.
5) after the completion of fusing, continue, by B or C, to discharge to capacitance, after LED3 start button lights, capacitance electric discharge
It completes.
6) after the completion of testing, power switch is closed.
Ii. it manually controls
Switching switch is pushed into right side, device becomes manually controlling state.
1) it is closed charge switch, gives capacitor charging, after equally waiting 45~60 seconds, capacitor charging is basically completed；
2) charging complete disconnects charge switch, charge closing.
3) logging mode of switching capture program is to " record and read ", and runs program, and program start recording is believed at this time
Number.
4) " startup " button is pressed, trigger switch is connected, carries out fusing operation.
5) after the completion of fusing, continue to press " startup " button, connect discharge switch, discharge to capacitance, button light to be launched
After extinguishing, capacitance electric discharge is completed.
6) after the completion of testing, power switch is closed.
Step 3：Data are read and handled, measurand dynamic characteristic is obtained；
Program is opened, enters data read procedure interface, program interface mainly has the file path selection, left-half to be
Complete waveform figure, amplitude frequency diagram, phase frequency figure, right half part are interception portion waveshape figure, amplitude frequency diagram and phase frequency figure.
Then the file read needed for selection first puts program and runs icon, complete waveform figure, width can be shown on the left of program
Frequency figure and phase frequency figure.Wherein amplitude frequency diagram and phase frequency figure only shows the image of a signal, display signal by " Curve selection " into
Row switching must click program operation icon again after replacing curve every time.It is intercepted and is shown if you need to certain part to image
Show dynamic indicator, is then to intercept the initial position of partial trace by " start offset amount ", " length " is that need to intercept the length of curve
Degree, was filled according to the abscissa of curve in left side " complete waveform figure " as unit of the time.
After obtaining required data amplitude versus frequency characte figure, the vernier in mobile image is at corresponding resonant frequency, the x values of vernier
For resonant frequency numerical value, y is corresponding amplitude.
Claims (9)
1. a kind of negative step force generating system, it is characterised in that：Including power module and capacitor module；
The power module includes power supply and power indicating circuit；The capacitor module includes capacitator charging circuit, electric discharge
Circuit and Zapping circuit；
Power output end is connect with the input terminal of power indicating circuit and capacitator charging circuit respectively；
The power indicating circuit includes that the first resistor (R1) being sequentially connected in series and the second light emitting diode (D2), the power supply are defeated
Outlet is connect with the input terminal of first resistor (R1), the output end ground connection of the second light emitting diode (D2)；
The capacitator charging circuit include charge switch (S1) and with the concatenated charging parallel circuit of charge switch；
The charging parallel circuit includes charging indication and charging circuit parallel with one another；
The charging indication includes the third diode (D3) being sequentially connected in series, 3rd resistor (R3) and the 4th light emitting diode
(D4), the input terminal of the third diode (D3) is connect with the output end of charge switch (S1), the 4th light emitting diode (D4)
Output end ground connection；
The charging circuit includes the first diode (D1), the 4th resistance (R4) and shunt capacitance group being sequentially connected in series, and described
The input terminal of one diode (D1) is connect with the output end of charge switch (S1), the low-pressure end ground connection of shunt capacitance group；
The input terminal of the discharge circuit is connected to the high-pressure side of shunt capacitance group, and the discharge circuit includes parallel with one another puts
Electric indicating circuit and discharge switch control circuit；The electric discharge indicating circuit includes the 5th diode (D5) being sequentially connected in series,
Six light emitting diodes (D6) and the 5th resistance (R5), the electric discharge indicating circuit further include the 6th resistance (R6) and the 7th resistance
(R7), the 6th resistance (R6) connect with the output end of the 5th resistance (R5) with one end of the 7th resistance (R7), and described
The other end of six resistance (R6) and the output end of power supply connect, the other end ground connection of the 7th resistance (R7)；The electric discharge is opened
It includes the discharge switch (S3) and the 8th resistance (R8) being sequentially connected in series, the output end ground connection of the 8th resistance (R8) to close control circuit；
The Zapping circuit is in parallel with discharge switch control circuit, including the 7th diode (D7) and thyristor being sequentially connected in series
(Q1), the output end of the 7th diode (D7) is connect with the anode of thyristor (Q1), and the cathode of the thyristor (Q1) connects
One loop line binding post, another loop line binding post ground connection；The control terminal of the thyristor (Q1) by second resistance (R2) and
Trigger switch (S2) is connect with the output end of power supply.
2. negative step force generating system according to claim 1, it is characterised in that：The 7th diode in Zapping circuit
(D7) both ends are equipped with signal output end, for measuring fusing moment voltage signal.
3. negative step force generating system according to claim 2, it is characterised in that：The shunt capacitance group is capacitance (C1)
It is parallel with one another with capacitance (C2)；
The first resistor (R1), 3rd resistor (R3), the 6th resistance (R6), the 7th resistance (R7) resistance value be 6.2K Ω,
4th resistance (R4) is the power resistor that power is 5w, and the resistance value of the 5th resistance (R5) is 1K Ω, the 8th electricity
The resistance value for hindering (R8) is 100 Ω, and the resistance value of the second resistance (R2) is 240 Ω；First diode (D1), third diode
(D3), the 5th diode (D5) is IN4007 series, and the 7th diode (D7) is IN5048.
4. negative step force generating system according to claim 3, it is characterised in that：Further include remote control module, the remote control
Module is used to control the opening and closing of charge switch (S1), discharge switch (S3) and trigger switch (S2).
5. a kind of caliberating device of thrust measurement dynamic characteristic, it is characterised in that：Including any negative ranks of claim 1-4
The power that jumps generating system, two sections of fused wires, dynamometric system, signal gathering unit and data processing unit；
The dynamometric system includes sensor fastening device, the electron-amplifier being connect with sensor to be measured and is loaded by loop line
Power source on a sensor；
One end of two sections of fused wires is separately fixed on loop line binding post, and the other end of two sections of fused wires is contacted with loop line；
The output end of electron-amplifier and the signal output end of negative step force generating system are connect with signal gathering unit；
The output end of signal gathering unit is connect with data processing unit.
6. the caliberating device of thrust measurement dynamic characteristic according to claim 5, it is characterised in that：It further include fused wire
Fixing device, the fused wire fixing device include support portion and fixed part, and the fixed part can be in support portion realization
Under move left and right, the fixed part is equipped with the fixture of fixed fused wire.
7. the caliberating device of thrust measurement dynamic characteristic according to claim 6, it is characterised in that：Further include that power transmits machine
Structure, the force transfer mechanism include fixed seat, supporting rod and fixed pulley, and one end of the supporting rod is fixed in fixed seat, branch
The other end of strut fixes fixed pulley, and supporting rod has certain angle with horizontal plane.
8. the caliberating device of thrust measurement dynamic characteristic according to claim 7, it is characterised in that：The power source is standard
The object of the counterweight either corrresponding quality through measurement.
9. the caliberating device of thrust measurement dynamic characteristic according to claim 8, it is characterised in that：The signal acquisition list
Member uses the data collecting card of NI.
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| CN201721797346.4U CN207610813U (en) | 2017-12-20 | 2017-12-20 | Negative step force generating system, thrust measurement dynamic characteristic caliberating device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107991018A (en) * | 2017-12-20 | 2018-05-04 | 西安航天计量测试研究所 | Negative step force generating system, thrust measurement dynamic characteristic caliberating device and method |
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2017
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107991018A (en) * | 2017-12-20 | 2018-05-04 | 西安航天计量测试研究所 | Negative step force generating system, thrust measurement dynamic characteristic caliberating device and method |
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Granted publication date: 20180713 Termination date: 20191220 |