CN208270147U - Pressure sensitive coating calibrating installation and calibration system - Google Patents
Pressure sensitive coating calibrating installation and calibration system Download PDFInfo
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- CN208270147U CN208270147U CN201820720215.4U CN201820720215U CN208270147U CN 208270147 U CN208270147 U CN 208270147U CN 201820720215 U CN201820720215 U CN 201820720215U CN 208270147 U CN208270147 U CN 208270147U
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Abstract
The utility model relates to pressure sensitive coatings to calibrate field, disclosing a kind of pressure sensitive coating calibrating installation and calibration system, calibration system includes excitation light source, photomultiplier tube, temperature controller, signal generator, data collector and pressure sensitive coating calibrating installation as described above；Excitation light source receives the light of PSP test piece transmitting by photomultiplier tube for being irradiated to the PSP test piece；Temperature controller is connect with PSP test piece and temperature control chip, adjusts PSP test piece temperature by temperature controller；Signal generator is used to generate the periodic signal of specific frequency, which is transferred to loudspeaker after power amplifier amplifies, and loudspeaker generates pressure oscillation；The signal of signal generator described in data collector synchronous acquisition, photomultiplier tube and pressure sensor, and be transferred to computer and handled.The utility model can be achieved at the same time unstable state and steady state calibration, can be calibrated under different background gaseous environment.
Description
Technical field
The utility model relates to pressure sensitive coating collimation technique fields, calibrate more particularly to a kind of pressure sensitive coating
Device and calibration system.
Background technique
Pressure sensitive coating (Pressure-sensitive paint, PSP) technology is a kind of advanced aerodynamic force optics
Measuring technique, compared to traditional measurement method based on pressure tap, PSP can provide contactless whole audience pressure data,
Flow field is not influenced, has the advantages that Measurement Resolution is high, at low cost.PSP is widely used to the various wind of aerospace field
In dynamic test.
PSP manometric technique is the principle of luminescence generated by light and oxygen quenching based on coating, by including in model surface coating
The coating of special light emitting molecule irradiates coating using the excitation light source of certain wavelength, and the light emitting molecule in coating absorbs exciting light
After the energy of son, by ground state transition to excitation state.Light emitting molecule in excitation state can be returned to by way of radiated photons
Ground state, referred to as " luminous "；Ground state can also be returned to and interaction and energy exchange occurs with other molecules in system,
Referred to as " quench ".Oxygen in air is a kind of effective quenching object, when the oxygen molecule concentration in PSP is higher, quenching effect
It is more obvious, the luminous intensity of PSP is then lower.And the oxygen molecule concentration in PSP is directly proportional to the oxygen pressure on its surface, because
This, the luminous intensity of PSP is reduced with the raising of surface oxygen pressure.It can be changed by measuring the light distribution of PSP when test
Calculation obtains the gas pressure distribution of model surface.
Before carrying out aerodynamics test using PSP, need to carry out school to the relationship of coating luminous intensity and surface pressing
Standard, calibration are divided into steady state calibration and unstable state calibration.Steady state calibration is that different temperatures and pressure are obtained in the state that pressure is stablized
The luminous intensity of PSP when power, so that light intensity-pressure curve under obtaining different temperatures, is mainly used for the examination of steady-state air dynamics
It tests.Unstable state calibration obtains PSP under different frequency pressure oscillation generally by the cycle pressure signal for generating different frequency
Decaying and phase difference；Since many aerodynamic phenomenons are unstable state, and unstable signal can be become by Fourier
It changes and is converted to frequency-region signal and is analyzed, therefore the unstable state calibration of PSP is increasingly taken seriously.
The research and application to PSP domestic at present is less, is still in infancy, the calibrating installation related patents being related to
Also less；General calibrating installation is unable to satisfy PSP strip pressure equal condition everywhere in cycle pressure signal calibration
(plane wave condition), therefore calibration accuracy is not high or cannot achieve cycle pressure signal calibration, and does not have the function of steady state calibration
Energy.
Utility model content
(1) technical problems to be solved
The utility model aims to solve at least one of technical problems existing in the prior art or related technologies.
The purpose of the utility model is to provide a kind of pressure sensitive coating calibrating installation and calibration systems, can be achieved at the same time non-
Stable state and steady state calibration can be calibrated under different background gaseous environment, with structure is simple, applicability is wide, at low cost
Feature.
(2) technical solution
In order to solve the above-mentioned technical problem, the utility model provides a kind of pressure sensitive coating calibrating installation comprising stays
Wave duct, signal cabin and calibration cabin, the signal cabin and calibration cabin are detachably connected to the both ends of the standing wave tube respectively, described
Standing wave tube is connected to the signal cabin, and with calibration cabin airtight connection；
The signal cabin includes signal cabin pedestal and the signal hatchway cover for being sealedly connected on signal cabin open end, described
The loudspeaker connecting with the signal hatchway cover, the vibration plane of the loudspeaker and the letter are equipped in the cavity of signal cabin pedestal
There are adjustment spacing between number hatchway cover, the rear end of signal cabin pedestal is equipped with the gas source gas outside power connection and connection
Mouth, the loudspeaker connect the power connection by power supply line；
The calibration cabin includes the calibration cabin front shroud calibrated cabin pedestal and be sealedly connected on the calibration cabin pedestal both ends
With calibration cabin back shroud, the calibration cabin pedestal is interior to be equipped with the test piece pedestal being located on the calibration cabin front shroud, the test piece
Be pasted with PSP test piece before pedestal, be pasted with temperature control chip behind the test piece pedestal, the calibration cabin pedestal be equipped with across
The PSP test piece, test piece pedestal and temperature control chip center through-hole, pressure sensor, the test piece base are installed in the through-hole
Seat is avoided being equipped with thermistor at the position of the PSP test piece, and the thermistor, pressure sensor and temperature control chip pass through respectively
Signal wire connects one to one to the power connection calibrated on the back shroud of cabin is set to, and is additionally provided on the back shroud of the calibration cabin
The sensor reference end gas nozzle being connect by gas-guide tube with the pressure sensor.
Wherein, the standing wave tube is quartz glass tube.
Wherein, signal cabin pedestal is connect with the signal hatchway cover by threaded fastener, and junction is equipped with close
Packing；
The calibration cabin pedestal passes through threaded fastener and connect with the calibration cabin front shroud and calibration cabin back shroud, and
Junction is equipped with gasket；
The loudspeaker is connected through a screw thread part and is connected on the signal hatchway cover, and is arranged on the threaded connector
Have apart from adjusting block.
Wherein, the paste outside of the calibration cabin pedestal has radiating fin.
Wherein, crossbeam is equipped in the pedestal of the calibration cabin, the temperature control chip is pasted onto the crossbeam and the test piece pedestal
Between, the crossbeam is equipped with the centre bore for being connected to the through-hole.
Wherein, it is arranged with pedestal collet outside the test piece pedestal, the bottom of the pedestal collet is outward extended with ring
Shape flange, the annular flange are covered in the surface of the temperature control chip；
Sensor collet is arranged with outside the pressure sensor.
Wherein, the front center of the test piece pedestal is equipped with installation groove, and the PSP test piece is set to the installation groove
In, outer surface, the pressure experience face of the pressure sensor of the PSP test piece are concordant with before the test piece pedestal.
Wherein, sensor reference end gas nozzle is communicated with atmospheric environment or gas buffer tank；
The center of the signal hatchway cover is equipped with connection through-hole, and one end of the standing wave tube is inserted into the connection through-hole simultaneously
It is Nian Jie with the connection through-hole；
The calibration cabin front shroud is equipped with connecting groove, the other end of the standing wave tube be inserted into the connecting groove and with
The connecting groove bonding, and it is Nian Jie with the outer wall of the pedestal collet.
The utility model also provides a kind of pressure sensitive coating calibration system comprising excitation light source, photomultiplier tube, temperature
Spend controller, signal generator, data collector and pressure sensitive coating calibrating installation as described above；
The excitation light source receives the PSP by the photomultiplier tube and tries for being irradiated to the PSP test piece
The light of piece transmitting；
The temperature controller is connect with the PSP test piece and the temperature control chip, is adjusted by the temperature controller
The PSP test piece temperature；
The signal generator is used to generate the periodic signal of specific frequency, and the periodic signal is after power amplifier amplifies
It is transferred to the loudspeaker, the loudspeaker generates pressure oscillation；
The letter of signal generator described in the data collector synchronous acquisition, photomultiplier tube and the pressure sensor
Number, and be transferred to computer and handled.
Wherein, the gas source gas nozzle connects external air source by pressure controller；
The excitation light source and photomultiplier tube are respectively used to separate optical signal and increase equipped with filter plate and convex lens
Irradiation receives optical density.
(3) beneficial effect
Compared with prior art, the utility model has the advantage that
A kind of pressure sensitive coating calibrating installation provided by the utility model and calibration system, calibrating installation inside are sealing
Structure is not interfered by external environment, connects the settable different background gas parameter of gas source gas nozzle with pressure controller by gas source
Unstable state and stable state school of the PSP test piece under different background gas parameter can be achieved at the same time in (gaseous species, pressure, humidity etc.)
Standard, applicability are wide；Dismountable structure is convenient for changing PSP test piece, pressure sensor, loudspeaker etc. simultaneously.
Detailed description of the invention
Fig. 1 is a kind of axial sectional view of pressure sensitive coating calibrating installation of the utility model；
Fig. 2 is the partial enlarged view of A in Fig. 1；
Fig. 3 is a kind of schematic diagram of pressure sensitive coating calibration system of the utility model；
In figure: 1, quartz glass tube, 2, calibration cabin fastening screw, 3, calibration cabin front shroud, 4, radiating fin, 5, calibration cabin
Pedestal, 6, calibration cabin back shroud, 7, aviation socket, 8, sensor reference end gas nozzle, 9, gas-guide tube, 10, calibration cabin sealing ring,
11, signal hatchway cover, 12, signal cabin sealing ring, 13, signal cabin fastening screw, 14, signal cabin pedestal, 15, gas source gas nozzle, 16,
Power supply line, 17, loudspeaker, 18, loudspeaker fastening screw, 19, apart from adjusting block, 20, temperature control chip signal wire, 21, temperature control chip,
22, pedestal collet, 23, test piece pedestal, 24, PSP test piece, 25, pressure sensor, 26, sensor collet, 27, temperature-sensitive electricity
Resistance, 28, thermistor signal line, 29, sensor signal lines, 30, pressure sensor reference end.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below
Embodiment is not intended to limit the scope of the present invention for illustrating the utility model.
In the description of the present invention, it should be noted that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, rather than indicate
Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot understand
For limitations of the present invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, it is above-mentioned that concrete condition understanding can be regarded
The concrete meaning of term in the present invention.
As shown in Figs. 1-2, it is a kind of pressure sensitive coating calibrating installation provided by the utility model, makees for obtaining gas
For the pressure on 24 surface of PSP test piece and the calibration relation of 24 luminous intensity of PSP test piece comprising standing wave tube is preferably quartzy glass
Glass pipe 1, signal cabin and calibration cabin, the signal cabin and calibration cabin are detachably connected to the both ends of the standing wave tube, institute respectively
It states standing wave tube to be connected to the signal cabin, and single quartzy glass is used according to standing wave tube principle with calibration cabin airtight connection
Glass pipe 1 generates standing wave, the amplification to pressure wave amplitude is realized, firstly, having the advantages that structure is simple, at low cost；Secondly, quartzy
1 inner surface of glass tube is smooth, reduces connection seam, reduces noise and sound energy loss；Again, quartz glass has excellent optics
Transmitance, the exciting light and transmitting light of PSP test piece 24 can guarantee that optical path is unobstructed when calibration, visually directly through quartz glass tube 1
Range is big；
The signal cabin includes signal cabin pedestal 14 and the signal hatchway cover 11 for being sealedly connected on signal cabin open end,
The loudspeaker 17 connecting with the signal hatchway cover 11, the vibration of the loudspeaker 17 are equipped in the cavity of signal cabin pedestal 14
There are adjustment spacing between dynamic face and the signal hatchway cover 11, the rear end of signal cabin pedestal 14 be equipped with power connection and
Gas source gas nozzle 15 outside connection, gas source gas nozzle 15 connect gas source and pressure controller by gas-guide tube 9, are used for adjustment signal cabin
Interior gas parameter (gaseous species, humidity, pressure etc.), the loudspeaker 17 connects the power connection by power supply line 16, excellent
It is selected as aviation socket 7；
The calibration cabin includes the calibration cabin front cover calibrated cabin pedestal 5 and be sealedly connected on calibration 5 both ends of cabin pedestal
Plate 3 and calibration cabin back shroud 6, the calibration cabin pedestal 5 is interior to be equipped with the test piece pedestal 23 being located on the calibration cabin front shroud 3,
PSP test piece 24 is pasted with before the test piece pedestal 23, being pasted with temperature control chip 21 behind the test piece pedestal 23 is preferably
Semiconductor temperature-control piece 21, calibration cabin pedestal 5 are equipped with across 21 center of the PSP test piece 24, test piece pedestal 23 and temperature control chip
Through-hole, pressure sensor 25 is installed, the test piece pedestal 23 is avoided setting at the position of the PSP test piece 24 in the through-hole
There is thermistor 27, the thermistor 27, pressure sensor 25 and temperature control chip 21 pass through signal wire, that is, thermistor letter respectively
Number line 28, sensor signal lines 29, temperature control chip signal wire 20 connect one to one to the electricity being set on the calibration cabin back shroud 6
Connector such as aviation socket 7 in source is additionally provided on calibration cabin back shroud 6 and is connect by gas-guide tube 9 with the pressure sensor 25
Sensor reference end gas nozzle 8.It is sealing structure inside the calibrating installation, is not interfered by external environment, pass through gas source and pressure
Controller connects 15 settable different background gas parameter (gaseous species, pressure, humidity etc.) of gas source gas nozzle, can be achieved at the same time
Unstable state and steady state calibration of the PSP test piece 24 under different background gas parameter, applicability are wide；Dismountable structure is convenient simultaneously
Replace PSP test piece 24, pressure sensor 25, loudspeaker 17 etc..
In order to guarantee leakproofness, signal cabin pedestal 14 is for example believed with the signal hatchway cover 11 by threaded fastener
Number cabin fastening screw 13 connects, and junction is equipped with gasket such as signal cabin sealing ring 12；
Calibration cabin pedestal 5 and calibration cabin front shroud 3 and calibration cabin back shroud 6 pass through threaded fastener such as school
Quasi- cabin fastening screw 2 connects, and junction is equipped with gasket such as calibration cabin sealing ring 10 and seals；
The loudspeaker 17 is connected through a screw thread part as described in being connected to loudspeaker fastening screw 18 on signal hatchway cover 11,
And be arranged on the threaded connector apart from adjusting block 19, apart from adjusting block 19 be set to loudspeaker 17 and signal hatchway cover 11 it
Between threaded connector on, by replacement different in width apart from adjusting block 19, adjust vibration plane and the signal cabin of loudspeaker 17
Spacing between cover board 11 that is, for adjusting the vibration plane and 24 distance L of PSP test piece of different loudspeakers 17, and makes signal cabin
It ventilates with quartz glass tube 1 smooth.
Preferably, calibration cabin pedestal 5 is made using red copper of material, and the paste outside of the calibration cabin pedestal 5 has radiating fin
Piece 4, it is ensured that the heat that 21 back side of temperature control chip generates timely and effectively distributes, it is ensured that calibrating installation is in the case where working long hours
Temperature stability.
Wherein, crossbeam is equipped in calibration cabin pedestal 5, the temperature control chip 21 is pasted onto the crossbeam by thermally conductive AB glue
Between the test piece pedestal 23, the crossbeam is equipped with the centre bore for being connected to the through-hole.
Wherein, it is arranged with pedestal collet 22 outside the test piece pedestal 23, pedestal collet 22 opens a slit, for passing through
Thermistor signal line 28, the bottom of the pedestal collet 22 are outward extended with annular flange, and the annular flange is covered in
Temperature controlled accuracy is improved to reduce the thermal losses of test piece pedestal 23 and temperature control chip 21 in the surface of the temperature control chip 21；
It is arranged with sensor collet 26 outside the pressure sensor 25, pressure sensor 25 is avoided to generate because of temperature change
Signal drift even damages.
Wherein, the front center of the test piece pedestal 23 is equipped with installation groove, and the PSP test piece 24 passes through bond plies
It is pasted in the installation groove, does not depart from PSP test piece 24 under pressure oscillation when calibrating, and facilitate PSP test piece 24 more
Change, the outer surface of the PSP test piece 24, the pressure sensor 25 pressure experience face and before the test piece pedestal 23
Concordantly.
Wherein, pressure sensor reference end 30 and gas-guide tube 9 are tightly connected, sensor reference end gas nozzle 8 and atmosphere
Environment or gas buffer tank communicate, and guarantee that 25 reference pressure of pressure sensor is stablized, in calibration not by pressure fluctuating in inner
It influences；
The center of the signal hatchway cover 11 is equipped with connection through-hole, and one end of the standing wave tube is inserted into the connection through-hole
And it is Nian Jie with the connection through-hole；
Calibration cabin front shroud 3 is equipped with connecting groove, and the other end of the standing wave tube is inserted into the connecting groove simultaneously
It is Nian Jie with the connecting groove and Nian Jie with the outer wall of the pedestal collet 22, it is easy to connect.
24 surface pressing of PSP test piece is identical when in order to calibrate unstable state, and the pressure oscillation that loudspeaker 17 generates is in quartz
It should be propagated in the form of plane wave in glass tube 1, according to acoustic waveguide tube theory, the internal diameter D of quartz glass tube 1 should meet to be wanted as follows
It asks:
D≤1.84c/πfmax；
Wherein, c is the velocity of sound in quartz glass tube 1, fmaxTo need the maximum frequency calibrated；
In order to obtain sufficiently large pressure oscillation when unstable state is calibrated, the signal-to-noise ratio of calibration, 24 surface of PSP test piece are improved
The condition that standing wave is generated in quartz glass tube 1 should be met with 17 vibration plane distance L of loudspeaker:
L=n*c/2f (n=1,2,3 ...)
It is available in minimum calibration frequency fminWhen, distance L >=c/2fmin, it is possible thereby to determine quartz glass tube 1 most
Small length.
As shown in figure 3, the utility model additionally provides a kind of pressure sensitive coating calibration system comprising excitation light source,
Photomultiplier tube, temperature controller, signal generator, data collector and pressure sensitive coating calibration cartridge as described above
It sets；
The excitation light source receives the PSP for being irradiated to the PSP test piece 24, by the photomultiplier tube
The light that test piece 24 emits, the excitation light source and photomultiplier tube are respectively used to separate light letter equipped with filter plate and convex lens
Number and increase irradiation or receive optical density；
The temperature controller is connect with the PSP test piece 24 and the temperature control chip 21, passes through the temperature controller
Adjust 24 temperature of PSP test piece；
The signal generator is used to generate the periodic signal of specific frequency, and the periodic signal is after power amplifier amplifies
It is transferred to the loudspeaker 17, the loudspeaker 17 generates pressure oscillation；
The letter of signal generator described in the data collector synchronous acquisition, photomultiplier tube and the pressure sensor 25
Number, and be transferred to computer and handled.
Particularly, when loudspeaker 17 does not work, only 24 temperature of background pressure and PSP test piece in regulating device can be right
PSP test piece 24 carries out steady state calibration.
Wherein, the gas source gas nozzle 15 connects external air source by pressure controller, for gas ginseng in adjustment signal cabin
Number (gaseous species, humidity, pressure etc.).
As can be seen from the above embodiments, unstable state and steady state calibration can be achieved at the same time in the utility model, can be in different back
It is calibrated under scape gaseous environment, has the characteristics that structure is simple, applicability is wide, at low cost.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (10)
1. a kind of pressure sensitive coating calibrating installation, which is characterized in that including standing wave tube, signal cabin and calibration cabin, the signal
Cabin and calibration cabin are detachably connected to the both ends of the standing wave tube respectively, and the standing wave tube is connected to the signal cabin, and with
Calibration cabin airtight connection；
The signal cabin includes signal cabin pedestal and the signal hatchway cover for being sealedly connected on signal cabin open end, the signal
The loudspeaker connecting with the signal hatchway cover, the vibration plane of the loudspeaker and the signal cabin are equipped in the cavity of cabin pedestal
There are adjustment spacing between cover board, the rear end of signal cabin pedestal is equipped with the gas source gas nozzle outside power connection and connection,
The loudspeaker connects the power connection by power supply line；
The calibration cabin includes calibration cabin front shroud and the school calibrated cabin pedestal and be sealedly connected on the calibration cabin pedestal both ends
Quasi- cabin back shroud, the calibration cabin pedestal is interior to be equipped with the test piece pedestal being located on the calibration cabin front shroud, the test piece pedestal
Before be pasted with PSP test piece, be pasted with temperature control chip behind the test piece pedestal, the calibration cabin pedestal is equipped with across described
PSP test piece, test piece pedestal and temperature control chip center through-hole, pressure sensor is installed in the through-hole, the test piece pedestal is kept away
It opens and is equipped with thermistor at the position of the PSP test piece, the thermistor, pressure sensor and temperature control chip pass through signal respectively
Line connects one to one to the power connection calibrated on the back shroud of cabin is set to, and is additionally provided with and passes through on the back shroud of the calibration cabin
The sensor reference end gas nozzle that gas-guide tube is connect with the pressure sensor.
2. pressure sensitive coating calibrating installation according to claim 1, which is characterized in that the standing wave tube is quartz glass
Pipe.
3. pressure sensitive coating calibrating installation according to claim 1, which is characterized in that signal cabin pedestal with it is described
Signal hatchway cover is connected by threaded fastener, and junction is equipped with gasket；
The calibration cabin pedestal passes through threaded fastener and connect with the calibration cabin front shroud and calibration cabin back shroud, and connects
Place is equipped with gasket；
The loudspeaker is connected through a screw thread part and is connected on the signal hatchway cover, and be arranged on the threaded connector away from
From adjusting block.
4. pressure sensitive coating calibrating installation according to claim 1, which is characterized in that the outside of the calibration cabin pedestal
It is pasted with radiating fin.
5. pressure sensitive coating calibrating installation according to claim 1, which is characterized in that be equipped in the pedestal of the calibration cabin
Crossbeam, the temperature control chip are pasted between the crossbeam and the test piece pedestal, and the crossbeam, which is equipped with, to be connected in the through-hole
Heart hole.
6. pressure sensitive coating calibrating installation according to claim 1, which is characterized in that be arranged with outside the test piece pedestal
Pedestal collet, the bottom of the pedestal collet are outward extended with annular flange, and the annular flange is covered in the temperature control
The surface of piece；
Sensor collet is arranged with outside the pressure sensor.
7. pressure sensitive coating calibrating installation according to claim 1, which is characterized in that in front of the test piece pedestal
The heart is equipped with installation groove, and the PSP test piece is set in the installation groove, the outer surface of the PSP test piece, the pressure sensing
The pressure experience face of device is concordant with before the test piece pedestal.
8. pressure sensitive coating calibrating installation according to claim 1, which is characterized in that sensor reference end gas nozzle
It is communicated with atmospheric environment or gas buffer tank；
The center of the signal hatchway cover is equipped with connection through-hole, one end of the standing wave tube be inserted into the connection through-hole it is interior and with institute
State connection through-hole bonding；
The calibration cabin front shroud is equipped with connecting groove, the other end of the standing wave tube be inserted into the connecting groove and with it is described
Connecting groove bonding, and it is Nian Jie with the outer wall of the pedestal collet.
9. a kind of pressure sensitive coating calibration system, which is characterized in that including excitation light source, photomultiplier tube, temperature controller,
Signal generator, data collector and such as described in any item pressure sensitive coating calibrating installations of claim 1-8；
The excitation light source receives the PSP test piece by the photomultiplier tube and sends out for being irradiated to the PSP test piece
The light penetrated；
The temperature controller is connect with the PSP test piece and the temperature control chip, by described in temperature controller adjusting
PSP test piece temperature；
The signal generator is used to generate the periodic signal of specific frequency, which transmits after power amplifier amplifies
To the loudspeaker, the loudspeaker generates pressure oscillation；
The signal of signal generator described in the data collector synchronous acquisition, photomultiplier tube and the pressure sensor, and
Computer is transferred to be handled.
10. pressure sensitive coating calibration system according to claim 9, which is characterized in that the gas source gas nozzle passes through pressure
Force controller connects external air source；
The excitation light source and photomultiplier tube are respectively used to separate optical signal and increase irradiation equipped with filter plate and convex lens
Or receive optical density.
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