CN104062068A - Step pressure generation method based on high-energy pulse laser device - Google Patents
Step pressure generation method based on high-energy pulse laser device Download PDFInfo
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Abstract
The invention provides a step pressure generation method and device based on a high-energy pulse laser device and three formed technical schemes of a pressure sensor dynamic calibration device, and belongs to the technical field of step pressure and voltage sensor dynamic calibration. The step pressure generation method includes the steps that high-energy pulse laser beams are adopted and emitted into a pressure cavity through a light-pervious window, and pressure transmission media are heated through the high-energy pulse laser beams and generate step pressure signals to the wall of the pressure cavity. The generation device comprises the high-energy pulse laser device, the pressure cavity, the light-pervious window, the pressure transmission media, a pipeline, a valve and an exhaust valve. The dynamic calibration device further comprises standard and calibrated pressure sensors, a temperature sensor, a signal cable and a data collecting mechanism. The step pressure serves as a signal source, measurement and comparison are carried out through the standard and calibrated pressure sensors, and accordingly a dynamic calibration result of the calibrated pressure sensor is obtained. The method and the device have the advantages that the method is innovative, ideal step pressure signals are generated, and the generation device is simple in structure and convenient to operate.
Description
Technical field
Step Pressure production method based on high energy pulse laser disclosed by the invention belongs to Step Pressure signalling technique field and pressure transducer Dynamic Calibration Technique field, what be specifically related to is a kind of employing high energy pulse laser beam heats pressure transmitting medium, produces the method for Step Pressure.
Background technology
In pressure signal dynamic test occasion, as: cannon chamber pressuring test, positive pressure of shock wave test etc., tested pressure signal has following characteristics: rising edge is precipitous, amplitude is high, the duration of pulse is short etc.In this type of dynamic test application, first must carry out dynamic calibration to pressure transducer, to guarantee that the various performance index of sensor meet test request.At present, conventional device or the method for pressure transducer dynamic calibration has: accurate δ function pulse calibrating installation under shock tube dynamic calibration apparatus, high static pressure, calibration method etc. drops hammer.
Under high static pressure, accurate δ function pulse calibrating installation is all to produce a pulse signal close to δ function with the calibration method that drops hammer, and with this pressure signal, sensor is calibrated.And shock tube dynamic calibration apparatus is that shock tube high pressure chest is carried out pneumatic compression, and utilize the difference of gaseous tension in high pressure chest and low-pressure cavity to make the rupture of diaphragm between two chambeies, thereby gas enters low-pressure cavity from high pressure chest and produces shock wave, shock wave is got to the pressure signal that forms an approximate step signal on pressure transducer, with this Step Pressure signal, carrys out calibrating sensors.Shock tube is one of reliable method of present generally acknowledged calibrating pressure sensor, the part but shock tube calibrating installation still comes with some shortcomings: first, the Step Pressure amplitude that shock tube can produce can only reach tens MPas, be difficult to reach hundreds of MPa, often can not meet the requirement of high pressure sensor calibration; Secondly, shock tube adopts rupture of membranes mode to produce shock wave, and consequent Step Pressure signal elevating time is longer, is microsecond magnitude, larger apart from desirable step signal gap.
The present invention is in order to solve the shortcoming that traditional shock tube calibrating installation Step Pressure amplitude is less, rising time is longer, proposed a kind ofly to utilize high power laser transient heating pressure transmitting medium and produce the method for the pressure signal that amplitude is large, rising time is shorter, and with this signal, high pressure sensor has been carried out to dynamic calibration.
Summary of the invention
The object of the invention is: to society, provide Step Pressure production method and the generation device thereof based on high energy pulse laser, and three technical schemes of pressure transducer dynamic calibration apparatus of the formation of the Step Pressure production method based on high energy pulse laser, Step Pressure production method of the present invention can produce more than pressure amplitude reaches 100 MPas, and Step Pressure rising time is less than the Step Pressure signal of 30 nanoseconds.Two indexs of the amplitude of step signal and rising time are all better than the Step Pressure signal that traditional shock tube produces.
Technical scheme of the present invention comprises Step Pressure production method and the generation device thereof based on high energy pulse laser, and pressure transducer dynamic calibration apparatus three parts of the formation of the Step Pressure production method based on high energy pulse laser.
The present invention is such about the technical scheme of the Step Pressure production method based on high energy pulse laser: this Step Pressure production method based on high energy pulse laser, technical characterstic is: described Step Pressure production method is to adopt high energy pulse laser beam, seeing through high pressure resistant light inlet window injects in pressure chamber, pressure transmitting medium in pressure chamber is produced Step Pressure by high energy pulse laser beam heats to pressure chamber walls, more than this Step Pressure signal pressure amplitude can reach 100 MPas, the rising edge duration was less than for 30 nanoseconds.
According to the above-described Step Pressure production method based on high energy pulse laser, technical characterstic also has: the described Step Pressure production method based on high energy pulse laser is: adopt high energy pulse laser transmitting high energy pulse laser beam, through high pressure resistant light inlet window, inject in airtight pressure chamber, now heated pressure transmitting medium molecular thermalmotion aggravation in pressure chamber, pressure chamber walls is produced to pressure, this pressure is Step Pressure signal, described high energy pulse laser beam can see through high pressure resistant light inlet window with very little energy loss and inject in airtight pressure chamber, in pressure chamber, be full of pressure transmitting medium, the pressure transmitting medium of this high energy pulse laser beam in can heated pressure chamber, make the molecular thermalmotion aggravation of pressure transmitting medium, molecular thermalmotion aggravation shows as the temperature rising of pressure transmitting medium in macroscopic view and the pressure of pressure transmitting medium raises, the pressure action raising forms the pressure increasing in pressure chamber walls, thereby produce pressure signal rising edge.Pressure rise no longer increases afterwards to certain amplitude, and now the temperature due to pressure transmitting medium keeps high temperature a period of time, and same high pressure amplitude also keeps a period of time, the complete Step Pressure signal of process formation that therefore whole pressure raises and keeps.
According to the above-described Step Pressure production method based on high energy pulse laser, detailed technology feature also has: the high energy pulse laser index described in a. is selected single pulse energy to be greater than 10 joules, monopulse duration and was less than for 30 nanoseconds, for guaranteeing to produce the Step Pressure signal that amplitude is large, the rise time is short, selection can be launched the laser instrument that single pulse energy is large, the duration of pulse is short, this laser instrument model is HLS-R40 in this way, with single INFRARED PULSE LASER IRRADIATION pressure transmitting medium, so the feature of laser pulse has just guaranteed the characteristic of Step Pressure signal.B. the detailed structure of described pressure chamber is spheroid or square or rectangular parallelepiped, its volume is selected 0.1 cubic metre ~ 0.5 cubic metre, the volume of pressure chamber and shape are selected according to the pressure amplitude of required generation and the single pulse energy of laser instrument, the material selection criteria of pressure chamber is mainly high pressure resistant, and pressure chamber withstand voltage is greater than 800 MPas.The index selection withstand voltage of described high pressure resistant light inlet window is greater than 800 MPas, transmittance is greater than 91%, a plurality of high pressure resistant light inlet windows can be set on pressure chamber, thereby can realize a plurality of laser instruments, from high pressure resistant light inlet window, irradiate the pressure signal that heats pressure transmitting medium and obtain high amplitude simultaneously.C. described pressure transmitting medium is liquid, select glycerine or kerosene, its index: specific heat capacity is lower than 2220 joules of/kilogram of Kelvins, liquid pressure transmitting medium can guarantee that liquid pressure is everywhere consistent, and liquid pressure transmitting medium also keeps consistent everywhere to the pressure of pressure chamber walls, selecting the little liquid of specific heat capacity is to guarantee that the temperature lift-off value of liquid under certain energy is large, obtains thus the Step Pressure value of amplitude.
Technical scheme about the Step Pressure generation device based on high energy pulse laser is such: this Step Pressure generation device based on high energy pulse laser, technical characterstic is: described Step Pressure generation device includes the high energy pulse laser beam of high energy pulse laser and generation thereof, pressure chamber and on high pressure resistant light inlet window, pressure transmitting medium, pressure transmitting medium is changed pipeline, valve, vent valve, this device adopts high energy pulse laser transmitting high energy pulse laser beam, through high pressure resistant light inlet window, inject in airtight pressure chamber, now heated pressure transmitting medium molecular thermalmotion aggravation in pressure chamber, pressure chamber walls is produced to pressure, this pressure is Step Pressure signal, described Step Pressure signal is that pressure transmitting medium increases the pressure of pressure chamber walls, pressure increases, pressure no longer increases after increasing to certain amplitude, now the temperature of pressure transmitting medium keeps high temperature a period of time, same high pressure amplitude also keeps a period of time, whole process produces a complete Step Pressure signal.Pressure transmitting medium is changed pipeline and valve, vent valve are used in conjunction with when pressure transmitting medium injection pressure chamber, injection process is: valve and exhaust valve opening, pressure transmitting medium is changed pipeline injection pressure chamber by pressure transmitting medium, vent valve is for discharging the air in this process pressure chamber, valve-off and vent valve while filling with; Discharge process is: open vent valve, Open valve, discharges pressure transmitting medium subsequently, closes vent valve and valve after emptying.Pressure transmitting medium is changed pipeline and valve and vent valve and is selected to require can to tolerate high pressure.
According to the above-described Step Pressure generation device based on high energy pulse laser, detailed technology feature also has: the high energy pulse laser index described in a. is selected single pulse energy to be greater than 10 joules, monopulse duration and was less than for 30 nanoseconds, for guaranteeing to produce the Step Pressure signal that amplitude is large, the rise time is short, selection can be launched the laser instrument that single pulse energy is large, the duration of pulse is short, this laser instrument model is HLS-R40 in this way, with single INFRARED PULSE LASER IRRADIATION pressure transmitting medium, so the feature of laser pulse has just guaranteed the characteristic of Step Pressure signal.B. the detailed structure of described pressure chamber is spheroid or square or rectangular parallelepiped, its volume is selected 0.1 cubic metre ~ 0.5 cubic metre, the volume of pressure chamber and shape are selected according to the pressure amplitude of required generation and the single pulse energy of laser instrument, the material selection criteria of pressure chamber is mainly high pressure resistant, and pressure chamber withstand voltage is greater than 800 MPas.The index selection withstand voltage of described high pressure resistant light inlet window is greater than 800 MPas, transmittance is greater than 91%, a plurality of high pressure resistant light inlet windows can be set on pressure chamber, thereby can realize a plurality of laser instruments, from high pressure resistant light inlet window, irradiate the pressure signal that heats pressure transmitting medium and obtain high amplitude simultaneously.C. described pressure transmitting medium is liquid, select glycerine or kerosene, its index: specific heat capacity is lower than 2220 joules of/kilogram of Kelvins, liquid pressure transmitting medium can guarantee that liquid pressure is everywhere consistent, and liquid pressure transmitting medium also keeps consistent everywhere to the pressure of pressure chamber walls, selecting the little liquid of specific heat capacity is to guarantee that the temperature lift-off value of liquid under certain energy is large, obtains thus the Step Pressure value of amplitude.D. described pressure transmitting medium is changed pipeline front end connection pressure transmitting medium source, Bonding pressure chamber, rear end, and valve two ends connect respectively pressure transmitting medium and change pipeline; Vent valve one end is connected on pressure chamber, and outlet connects extraneous, and pressure transmitting medium changes pipeline and valve, vent valve inject at pressure transmitting medium, discharge pressure is used in conjunction with during chamber.
The technical scheme of the pressure transducer dynamic calibration apparatus forming about the Step Pressure production method based on high energy pulse laser is such: the pressure transducer dynamic calibration apparatus that this Step Pressure production method based on high energy pulse laser forms, technical characterstic is: this described dynamic calibration apparatus includes the high energy pulse laser beam of high energy pulse laser and generation thereof, pressure chamber and on high pressure resistant light inlet window, pressure transmitting medium, pressure transmitting medium is changed pipeline, valve, vent valve, standard pressure transducer, be calibrated pressure transducer, temperature sensor, signal cable, data acquisition mechanism.According to public pressure transducer dynamic calibration method and established procedure, carry out pressure transducer dynamic calibration of the present invention: this dynamic calibration apparatus adopts high energy pulse laser transmitting high energy pulse laser beam, through high pressure resistant light inlet window, inject in airtight pressure chamber, now heated pressure transmitting medium molecular thermalmotion aggravation in pressure chamber, pressure chamber walls is produced to pressure, and this pressure is Step Pressure signal.Described pressure transmitting medium molecular thermalmotion aggravation, pressure increase, pressure to pressure chamber walls increase, pressure no longer increases after increasing to certain amplitude, now the temperature of pressure transmitting medium keeps high temperature a period of time, same high pressure amplitude also keeps a period of time, and whole process produces a complete Step Pressure signal.In pressure chamber walls outside, connect respectively standard pressure transducer, be calibrated pressure transducer, each signal input part of temperature sensor, with signal cable respectively connection standard pressure transducer, be calibrated pressure transducer, each signal output part of temperature sensor to data acquisition mechanism, adopt the Step Pressure signal on the wall of input pressure chamber, through standard pressure transducer, be calibrated pressure transducer and measure comparison, complete being calibrated the dynamic calibration of pressure transducer.The pressure signal of the standard pressure transducer of usining output is as input signal, using be calibrated pressure transducer output pressure signal as output signal, input signal and output signal are done respectively to Fast Fourier Transform (FFT), the Fast Fourier Transform (FFT) result of the Fast Fourier Transform (FFT) result of output signal and input signal is asked to ratio, obtain being calibrated the dynamic transfer function of pressure transducer, obtain its dynamic calibration result.Pressure transmitting medium is changed pipeline and valve, vent valve are used in conjunction with when pressure transmitting medium injection pressure chamber, injection process is: valve and exhaust valve opening, pressure transmitting medium is changed pipeline injection pressure chamber by pressure transmitting medium, vent valve is for discharging the air in this process pressure chamber, valve-off and vent valve while filling with; Discharge process is: open vent valve, Open valve, discharges pressure transmitting medium subsequently, closes vent valve and valve after emptying.Pressure transmitting medium is changed pipeline and valve and vent valve and is selected to require can to tolerate high-pressure.
According to above-described pressure transducer dynamic calibration apparatus, detailed technology feature also has: the high energy pulse laser index described in a. is selected single pulse energy to be greater than 10 joules, monopulse duration and was less than for 30 nanoseconds, for guaranteeing to produce the Step Pressure signal that amplitude is large, the rise time is short, selection can be launched the laser instrument that single pulse energy is large, the duration of pulse is short, this laser instrument model is HLS-R40 in this way, with single INFRARED PULSE LASER IRRADIATION pressure transmitting medium, so the feature of laser pulse has just guaranteed the characteristic of Step Pressure signal.B. the detailed structure of described pressure chamber is spheroid or square or rectangular parallelepiped, its volume is selected 0.1 cubic metre ~ 0.5 cubic metre, the volume of pressure chamber and shape are selected according to the pressure amplitude of required generation and the single pulse energy of laser instrument, the material selection criteria of pressure chamber is mainly high pressure resistant, and pressure chamber withstand voltage is greater than 800 MPas.The index selection withstand voltage of described high pressure resistant light inlet window is greater than 800 MPas, transmittance is greater than 91%, a plurality of high pressure resistant light inlet windows can be set on pressure chamber, thereby can realize a plurality of laser instruments, from high pressure resistant light inlet window, irradiate the pressure signal that heats pressure transmitting medium and obtain high amplitude simultaneously.C. described pressure transmitting medium is liquid, select glycerine or kerosene, its index: specific heat capacity is lower than 2220 joules of/kilogram of Kelvins, liquid pressure transmitting medium can guarantee that liquid pressure is everywhere consistent, and liquid pressure transmitting medium also keeps consistent everywhere to the pressure of pressure chamber walls, selecting the little liquid of specific heat capacity is to guarantee that the temperature lift-off value of liquid under certain energy is large, obtains thus the Step Pressure value of amplitude.D. described pressure transmitting medium is changed pipeline front end connection pressure transmitting medium source, Bonding pressure chamber, rear end, and valve two ends connect respectively pressure transmitting medium and change pipeline; Vent valve one end is connected on pressure chamber, and outlet connects extraneous, and pressure transmitting medium changes pipeline and valve, vent valve inject at pressure transmitting medium, discharge pressure is used in conjunction with during chamber.E. described standard pressure transducer is selected piezoelectric pressure indicator or piezoresistive pressure sensor, the described pressure transducer that is calibrated is piezoelectric pressure indicator or piezoresistive pressure sensor, described temperature sensor is selected platinum rhodium thermocouple, and temperature sensor is for monitoring the temperature variation at Step Pressure production process pressure transmitting medium.F. described data acquisition mechanism is selected by computing machine and data collecting card, electric charge prover, and operating system and the data processing software structure that forms a complete set of, computing machine and data collecting card, electric charge prover is as hardware, operating system and data processing software are as software, hardware-software is combined with, complete the collection of sensing data, record, show and analyze, when sensor is selected piezoelectric pressure indicator, use electric charge prover to carry out Signal Matching and send into data collecting card acquisition and recording, when sensor is selected piezoresistive pressure sensor, output signal is directly sent into data collecting card acquisition and recording.
Step Pressure production method and generation device advantage thereof based on high energy pulse laser of the present invention has: 1. the Step Pressure signal amplitude of generation is high, rising is fast, approaches desirable step signal; 2. Step Pressure generation device flexible structure, multifunction, easy to operate.The pressure transducer dynamic calibration apparatus advantage that Step Pressure production method based on high energy pulse laser of the present invention forms has: with this Step Pressure signal, pressure transducer is carried out to dynamic calibration, can have good effect.This Step Pressure production method and generation device thereof based on high energy pulse laser, and the pressure transducer dynamic calibration apparatus that the Step Pressure production method based on high energy pulse laser forms is worth adopting and promoting.
Accompanying drawing explanation
Figure of description of the present invention has 3 width:
Fig. 1 is the Step Pressure generation device structural representation based on high energy pulse laser;
Fig. 2 is the dynamic school of pressure transducer that the Step Pressure production method based on high energy pulse laser forms
Standard apparatus structural representation;
Fig. 3 is Step Pressure signal schematic representation, and in figure: ordinate is pressure, unit is MPa MPa, horizontal stroke
Coordinate is the time, and unit is microsecond μ s, and p0 is pressure transmitting medium original pressure, and p1 is high energy pulse laser beam
The pressure of pressure transmitting medium after heating, t0 is that pressure starts the moment of rising, t1 is that pressure initially rises to p1
The moment.
In each figure, adopted unified label, same object is used same label in each figure.In each figure: 1. high energy pulse laser; 2. high energy pulse laser beam; 3. pressure chamber; 4. pressure transmitting medium; 5. high pressure resistant light inlet window; 6. pressure transmitting medium is changed pipeline; 7. valve; 8. vent valve; 9. be calibrated pressure transducer; 10. standard pressure transducer; 11. temperature sensors; 12. signal cables; 13. data acquisition mechanisms; 14. Step Pressure signals.
Five. embodiment
Embodiments of the invention have three parts: the first is about the embodiment of the Step Pressure production method based on high energy pulse laser, it two is embodiment about the Step Pressure generation device based on high energy pulse laser, and it three is embodiment of the pressure transducer dynamic calibration apparatus that forms of the Step Pressure production method based on high energy pulse laser.
First is as follows about the non-limiting examples of the Step Pressure production method based on high energy pulse laser:
Embodiment mono-. the Step Pressure production method based on high energy pulse laser
The Step Pressure production method of this example based on high energy pulse laser can be combined and be illustrated or illustrate by Fig. 1, Fig. 3, referring to Fig. 1, the utensil that Step Pressure production method based on high energy pulse laser adopts includes: high energy pulse laser 1 and the high energy pulse laser beam 2 producing thereof, pressure chamber 3 and on high pressure resistant light inlet window 5, pressure transmitting medium 4.This routine high energy pulse laser 1 is selected model HLS-R40 in this way, single pulse energy is greater than 10 joules, monopulse duration and was less than for 30 nanoseconds, the shape of this example pressure chamber 3 is selected rectangular parallelepiped, 0.1 cubic metre of volume, the high pressure resistant value of pressure chamber 3 is greater than 800 MPas, this example pressure chamber 3 is selected 35CrMnSiA Steel material, the high pressure resistant value of the high pressure resistant light inlet window 5 of this example is greater than 800 MPas, transmittance is greater than 91%, the high pressure resistant light inlet window 5 of this example is selected aluminosilicate glass, this example pressure transmitting medium 4 is selected glycerol liquids, its index: specific heat capacity is lower than 2220 joules of/kilogram of Kelvins.High energy pulse laser 1 transmitting high energy pulse laser beam 2, high energy pulse laser beam 2 sees through high pressure resistant light inlet window 5 and injects in pressure chamber 3, the pressure transmitting medium 4 in high energy pulse laser beam 2 heated pressure chambeies 3 now, the molecular thermalmotion aggravation of pressure transmitting medium 4, temperature raises, pressure increases, 4 pairs of pressure chambers of pressure transmitting medium, 3 walls produce pressure, this pressure is the Step Pressure signal 14 shown in Fig. 3, and output terminal output from pressure chamber 3 walls, Fig. 3 illustrates a Step Pressure signal graph, the comparatively desirable Step Pressure signal that the Step Pressure production method of this figure explanation based on high energy pulse laser can produce, these Step Pressure signal 14 pressure amplitudes that produce through this example of actual measurement reach 110 MPas, Step Pressure rising time was 28 nanoseconds.
Embodiment bis-. the Step Pressure production method based on high energy pulse laser
The Step Pressure production method of this example based on high energy pulse laser can be combined and be illustrated by Fig. 1, Fig. 3.Step Pressure production method and the embodiment mono-Step Pressure production method difference based on high energy pulse laser of this example based on high energy pulse laser has: 1. this example pressure transmitting medium 4 is selected kerosene liquid; 2. the shape of this example pressure chamber 3 is selected spheroid, 0.5 cubic metre of volume; 3. two high pressure resistant light inlet windows 5 are set on pressure chamber 3, and adopt two high energy pulse lasers 1 to launch high energy pulse laser beam 2 through two high pressure resistant light inlet windows 5 heating pressure transmitting media 4 simultaneously; 4. the Step Pressure signal 14 actual measurement pressure amplitudes that this example produces reach 200 MPas, and Step Pressure rising time was 25 nanoseconds.All the other do not state the Step Pressure production method of this example based on high energy pulse laser, are entirely same as embodiment mono-. described in, no longer repeat.
Embodiment tri-. the Step Pressure production method based on high energy pulse laser
The Step Pressure production method of this example based on high energy pulse laser can be combined and be illustrated by Fig. 1, Fig. 3.Step Pressure production method and embodiment mono-, the embodiment bis-Step Pressure production method difference based on high energy pulse laser of this example based on high energy pulse laser has: 1. the shape of this example pressure chamber 3 is selected square, 0.3 cubic metre of volume; 2. three high pressure resistant light inlet windows 5 are set on pressure chamber 3, and adopt three high energy pulse lasers 1 to launch high energy pulse laser beam 2 through three high pressure resistant light inlet windows 5 heating pressure transmitting media 4 simultaneously; 3. the Step Pressure signal 14 actual measurement pressure amplitudes that this example produces reach 306 MPas, and Step Pressure rising time was 22 nanoseconds.All the other do not state the Step Pressure production method of this example based on high energy pulse laser, are entirely same as described in embodiment mono-, embodiment bis-, no longer repeat.
Second portion is as follows about the non-limiting examples of the Step Pressure generation device based on high energy pulse laser:
Embodiment mono-. the Step Pressure generation device based on high energy pulse laser
The Step Pressure generation device of this example based on high energy pulse laser combined and illustrated or illustrate by Fig. 1, Fig. 3, referring to Fig. 1, the Step Pressure generation device based on high energy pulse laser includes: high energy pulse laser 1 and the high energy pulse laser beam 2 producing thereof, pressure chamber 3 and on high pressure resistant light inlet window 5, pressure transmitting medium 4, pressure transmitting medium change pipeline 6, valve 7, vent valve 8.This routine high energy pulse laser 1 is selected model HLS-R40 in this way, single pulse energy is greater than 10 joules, monopulse duration and was less than for 30 nanoseconds, the shape of this example pressure chamber 3 is selected rectangular parallelepiped, 0.1 cubic metre of volume, the high pressure resistant value of pressure chamber 3 is greater than 800 MPas, this example pressure chamber 3 is selected 35CrMnSiA Steel material, the high pressure resistant value of the high pressure resistant light inlet window 5 of this example is greater than 800 MPas, transmittance is greater than 91%, the high pressure resistant light inlet window 5 of this example is selected aluminosilicate glass, this example pressure transmitting medium 4 is selected glycerol liquids, its index: specific heat capacity is lower than 2220 joules of/kilogram of Kelvins.High energy pulse laser 1 transmitting high energy pulse laser beam 2, high energy pulse laser beam 2 sees through high pressure resistant light inlet window 5 and injects in pressure chamber 3, the pressure transmitting medium 4 in high energy pulse laser beam 2 heated pressure chambeies 3 now, the molecular thermalmotion aggravation of pressure transmitting medium 4, temperature raises, pressure increases, 4 pairs of pressure chambers of pressure transmitting medium, 3 walls produce pressure, this pressure is the Step Pressure signal 14 shown in Fig. 3, and output terminal output from pressure chamber 3 walls, Fig. 3 illustrates a Step Pressure signal graph, the comparatively desirable Step Pressure signal that the Step Pressure production method of this figure explanation based on high energy pulse laser can produce.Pressure transmitting medium is changed pipeline 6, valve 7 is used in conjunction with during chamber 3 in pressure transmitting medium 4 injections, discharge pressure with vent valve 8, injection process is: valve 7 is opened with vent valve 8, pressure transmitting medium 4 is changed pipeline 6 injection pressure chambeies 3 by pressure transmitting medium, vent valve 8 is for discharging the air in this process pressure chamber 3, valve-off 7 and vent valve 8 while filling with; Discharge process is: open vent valve 8, Open valve 7 subsequently, discharges pressure transmitting medium 4, closes vent valve 8 and valve 7 after emptying.Pressure transmitting medium is changed pipeline 6 and is selected 35CrMnSiA Steel material, and valve 7 is selected 35CrMnSiA Steel material, and vent valve 8 is selected 35CrMnSiA Steel material, and pressure transmitting medium is changed pipeline 6, valve 7 can tolerate 800 MPa high pressure with vent valve 8.The Step Pressure signal 14 actual measurement pressure amplitudes that the Step Pressure generation device based on high energy pulse laser of this example produces reach 110 MPas, and Step Pressure rising time was 28 nanoseconds.
Embodiment bis-. the Step Pressure generation device based on high energy pulse laser
The Step Pressure generation device of this example based on high energy pulse laser can be combined and be illustrated by Fig. 1, Fig. 3.Step Pressure generation device and the embodiment mono-Step Pressure generation device difference based on high energy pulse laser of this example based on high energy pulse laser has: 1. this example pressure transmitting medium 4 is selected kerosene liquid; 2. the shape of this example pressure chamber 3 is selected spheroid, 0.5 cubic metre of volume; 3. two high pressure resistant light inlet windows 5 are set on pressure chamber 3, and adopt two high energy pulse lasers 1 to launch high energy pulse laser beam 2 through two high pressure resistant light inlet windows 5 heating pressure transmitting media 4 simultaneously; 4. these Step Pressure signal 14 actual measurement pressure amplitudes that this example produces reach 200 MPas, and Step Pressure rising time was 25 nanoseconds.All the other do not state the Step Pressure generation device of this example based on high energy pulse laser, are entirely same as embodiment mono-. described in, no longer repeat.
Embodiment tri-. the Step Pressure generation device based on high energy pulse laser
The Step Pressure generation device based on high energy pulse laser of this example can be combined and be illustrated by Fig. 1, Fig. 3.The Step Pressure generation device of this example based on high energy pulse laser and the Step Pressure generation device difference based on high energy pulse laser of embodiment mono-, embodiment bis-have: 1. the shape of this example pressure chamber 3 is selected square, 0.3 cubic metre of volume; 2. three high pressure resistant light inlet windows 5 are set on pressure chamber 3, and adopt three high energy pulse lasers 1 to launch high energy pulse laser beam 2 through three high pressure resistant light inlet windows 5 heating pressure transmitting media 4 simultaneously; 3. these Step Pressure signal 14 actual measurement pressure amplitudes that this example produces reach 306 MPas, and Step Pressure rising time was 22 nanoseconds.All the other do not state the Step Pressure generation device of this example based on high energy pulse laser, are entirely same as described in embodiment mono-, embodiment bis-, no longer repeat.
The non-limiting examples of the pressure transducer dynamic calibration apparatus that third part forms about the Step Pressure production method based on high energy pulse laser is as follows:
Embodiment mono-. the pressure transducer dynamic calibration apparatus that the Step Pressure production method based on high energy pulse laser forms
The pressure transducer dynamic calibration apparatus that the Step Pressure production method of this example based on high energy pulse laser forms is by Fig. 2, Fig. 3 combines and illustrates or illustrate, referring to Fig. 2, the pressure transducer dynamic calibration apparatus that Step Pressure production method based on high energy pulse laser forms includes: high energy pulse laser 1 and the high energy pulse laser beam 2 producing thereof, pressure chamber 3 and on high pressure resistant light inlet window 5, pressure transmitting medium 4, pressure transmitting medium is changed pipeline 6, valve 7, vent valve 8, be calibrated pressure transducer 9, standard pressure transducer 10, temperature sensor 11, signal cable 12, data acquisition mechanism 13.This routine high energy pulse laser 1 is selected model HLS-R40 in this way, single pulse energy is greater than 10 joules, monopulse duration and was less than for 30 nanoseconds, the shape of this example pressure chamber 3 is selected rectangular parallelepiped, 0.1 cubic metre of volume, the high pressure resistant value of pressure chamber 3 is greater than 800 MPas, this example pressure chamber 3 is selected 35CrMnSiA Steel material, the high pressure resistant value of the high pressure resistant light inlet window 5 of this example is greater than 800 MPas, transmittance is greater than 91%, the high pressure resistant light inlet window 5 of this example is selected aluminosilicate glass, this example pressure transmitting medium 4 is selected glycerol liquids, its index: specific heat capacity is lower than 2220 joules of/kilogram of Kelvins.Pressure transmitting medium is changed pipeline 6, valve 7 is used in conjunction with during chamber 3 in pressure transmitting medium 4 injections, discharge pressure with vent valve 8, injection process is: valve 7 is opened with vent valve 8, pressure transmitting medium 4 is changed pipeline 6 injection pressure chambeies 3 by pressure transmitting medium, vent valve 8 is for discharging the air in this process pressure chamber 3, valve-off 7 and vent valve 8 while filling with; Discharge process is: open vent valve 8, Open valve 7 subsequently, discharges pressure transmitting medium 4, closes vent valve 8 and valve 7 after emptying.Pressure transmitting medium is changed pipeline 6 and is selected 35CrMnSiA Steel material, and valve 7 is selected 35CrMnSiA Steel material, and vent valve 8 is selected 35CrMnSiA Steel material, and pressure transmitting medium is changed pipeline 6, valve 7 can tolerate 800 MPa high pressure with vent valve 8.According to public pressure transducer dynamic calibration method and established procedure, carry out this routine pressure transducer dynamic calibration: adopt high energy pulse laser 1 transmitting high energy pulse laser beam 2, high energy pulse laser beam 2 sees through high pressure resistant light inlet window 5 and injects in pressure chamber 3, the pressure transmitting medium 4 in high energy pulse laser beam 2 heated pressure chambeies 3 now, the molecular thermalmotion aggravation of pressure transmitting medium 4, temperature raises, pressure increases, 4 pairs of pressure chambers of pressure transmitting medium, 3 walls produce pressure, this pressure is the Step Pressure signal 14 shown in Fig. 3, and output terminal output from pressure chamber 3 walls, Fig. 3 illustrates a Step Pressure signal graph, the comparatively desirable Step Pressure signal that the pressure transducer dynamic calibration apparatus that the Step Pressure production method of this figure explanation based on high energy pulse laser forms can produce.The Step Pressure signal 14 actual measurement pressure amplitudes that the pressure transducer dynamic calibration apparatus that the Step Pressure production method based on high energy pulse laser of this example forms produces reach 110 MPas, and Step Pressure rising time was 28 nanoseconds.This example is to be calibrated pressure transducer 9, standard pressure transducer 10, temperature sensor 11, signal cable 12, data acquisition mechanism 13 is as sensor dynamic calibration part, be calibrated pressure transducer 9, standard pressure transducer 10 is arranged on the wall of pressure chamber 3 with temperature sensor 11, three's sensitive area contacts with pressure transmitting medium 4, can experience pressure transmitting medium 4 in this process to the pressure signal of its generation and temperature signal, be calibrated pressure transducer 9 and select piezoelectric pressure indicator with standard pressure transducer 10, temperature sensor 11 is selected platinum rhodium thermocouple, data acquisition mechanism 13 is selected by computing machine and data collecting card, electric charge prover, and operating system and the data processing software structure that forms a complete set of, computing machine and data collecting card, electric charge prover is as hardware, operating system and data processing software are as software, hardware-software is combined with, complete the collection of sensing data, record, show and analyze.In pressure chamber 3 walls outsides, connect respectively standard pressure transducer 10, be calibrated pressure transducer 9, temperature sensor 11 each signal input parts, with signal cable 12 respectively connection standard pressure transducer 10, be calibrated pressure transducer 9, temperature sensor 11 each signal output parts to data acquisition mechanism 13, adopt the Step Pressure signal 14 on 3 walls of input pressure chamber, through standard pressure transducer 10, be calibrated pressure transducer 9 and measure comparison, complete being calibrated the dynamic calibration of pressure transducer 9.The pressure signal that the standard pressure transducer 10 of usining is exported is as input signal, using the pressure signal of the output that is calibrated pressure transducer 9 as output signal, input signal and output signal are done respectively to Fast Fourier Transform (FFT), the Fast Fourier Transform (FFT) result of the Fast Fourier Transform (FFT) result of output signal and input signal is asked to ratio, obtain being calibrated the dynamic transfer function of pressure transducer 9, obtain its dynamic calibration result.Be calibrated pressure transducer 9 is connected to data collecting card by signal cable 12 with standard pressure transducer 10 the two output signal and carries out acquisition and recording after the conversion of electric charge prover, temperature sensor 11 is directly connected to data collecting card by signal cable 12 and carries out output signal acquisition and recording, and dynamic calibration result can demonstration on the included computing machine of data acquisition mechanism 13, analysis, record.
Embodiment bis-. pressure transducer dynamic calibration apparatus
The pressure transducer dynamic calibration apparatus that the Step Pressure production method of this example based on high energy pulse laser forms is combined and is illustrated by Fig. 2, Fig. 3.The pressure transducer dynamic calibration apparatus difference of the pressure transducer dynamic calibration apparatus that this is routine and embodiment mono-has: 1. this example pressure transmitting medium 4 is selected kerosene liquid; 2. the shape of this example pressure chamber 3 is selected spheroid, 0.5 cubic metre of volume; 3. two high pressure resistant light inlet windows 5 are set on pressure chamber 3, and adopt two high energy pulse lasers 1 to launch high energy pulse laser beam 2 through two high pressure resistant light inlet windows 5 heating pressure transmitting media 4 simultaneously; 4. these Step Pressure signal 14 actual measurement pressure amplitudes that this example produces reach 200 MPas, and Step Pressure rising time was 25 nanoseconds; 5. four sensor installation seats are set on pressure chamber 3; 6. two standard pressure transducer 10 are installed, install one and be calibrated pressure transducer 9, a temperature sensor 11 is installed, using the mean value of Output rusults of two standard pressure transducer 10 as the input signal that is calibrated pressure transducer 9, obtain thus its dynamic calibration result, can reduce calibration error; 7. be calibrated pressure transducer 9 and two standard pressure transducer 10 are selected piezoresistive pressure sensors, by signal cable 12 directly connect be calibrated pressure transducer 9, two standard pressure transducer 10 are carried out output signal acquisition and recording with output terminal to the data collecting card of temperature sensor 11.All the other do not state this routine pressure transducer dynamic calibration apparatus, are entirely same as embodiment mono-. described in, no longer repeat.
Embodiment tri-. pressure transducer dynamic calibration apparatus
The pressure transducer dynamic calibration apparatus that the Step Pressure production method based on high energy pulse laser of this example forms can be combined and be illustrated by Fig. 2, Fig. 3.The pressure transducer dynamic calibration apparatus difference of the pressure transducer dynamic calibration apparatus that this is routine and embodiment mono-, embodiment bis-has: 1. the shape of this example pressure chamber 3 is selected square, 0.3 cubic metre of volume; 2. three high pressure resistant light inlet windows 5 are set on pressure chamber 3, and adopt three high energy pulse lasers 1 to launch high energy pulse laser beam 2 through three high pressure resistant light inlet windows 5 heating pressure transmitting media 4 simultaneously; 3. these Step Pressure signal 14 actual measurement pressure amplitudes that this example produces reach 306 MPas, and Step Pressure rising time was 22 nanoseconds; 4. install two and be calibrated pressure transducer 9, a standard pressure transducer 10 is installed, a temperature sensor 11 is installed, can calibrate two thus simultaneously and be calibrated pressure transducer 9.All the other do not state this routine pressure transducer dynamic calibration apparatus, are entirely same as described in embodiment mono-, embodiment bis-, no longer repeat.
Claims (7)
1. the Step Pressure production method based on high energy pulse laser, be characterised in that: described Step Pressure production method is to adopt high energy pulse laser beam, see through high pressure resistant light inlet window and inject in pressure chamber, the pressure transmitting medium in pressure chamber is produced Step Pressure by high energy pulse laser beam heats to pressure chamber walls.
2. the Step Pressure production method based on high energy pulse laser according to claim 1, be characterised in that: described Step Pressure production method is to adopt high energy pulse laser transmitting high energy pulse laser beam, through high pressure resistant light inlet window, inject in airtight pressure chamber, now heated pressure transmitting medium molecular thermalmotion aggravation in pressure chamber, pressure chamber walls is produced to pressure, and this pressure is Step Pressure signal.
3. the Step Pressure production method based on high energy pulse laser according to claim 2, is characterised in that:
A. described high energy pulse laser index is selected single pulse energy to be greater than 10 joules, monopulse duration and was less than for 30 nanoseconds;
B. the detailed structure of described pressure chamber is spheroid or square or rectangular parallelepiped, and its volume is selected 0.1 cubic metre ~ 0.5 cubic metre, and pressure chamber withstand voltage is greater than 800 MPas; The index selection withstand voltage of described high pressure resistant light inlet window is greater than 800 MPas, transmittance is greater than 91%;
C. described pressure transmitting medium is liquid, selects glycerine or kerosene, its index: specific heat capacity is lower than 2220 joules of/kilogram of Kelvins.
4. the Step Pressure generation device of the Step Pressure production method based on high energy pulse laser according to claim 1, be characterised in that: described Step Pressure generation device includes the high energy pulse laser beam of high energy pulse laser and generation thereof, pressure chamber and on high pressure resistant light inlet window, pressure transmitting medium, pressure transmitting medium is changed pipeline, valve, vent valve, this device adopts high energy pulse laser transmitting high energy pulse laser beam, through high pressure resistant light inlet window, inject in airtight pressure chamber, now heated pressure transmitting medium molecular thermalmotion aggravation in pressure chamber, pressure chamber walls is produced to pressure, this pressure is Step Pressure signal.
5. Step Pressure generation device according to claim 4, is characterised in that:
A. described high energy pulse laser index is selected single pulse energy to be greater than 10 joules, monopulse duration and was less than for 30 nanoseconds;
B. the detailed structure of described pressure chamber is spheroid or square or rectangular parallelepiped, and its volume is selected 0.1 cubic metre ~ 0.5 cubic metre, and pressure chamber withstand voltage is greater than 800 MPas; The index selection withstand voltage of described high pressure resistant light inlet window is greater than 800 MPas, transmittance is greater than 91%;
C. described pressure transmitting medium is liquid, selects glycerine or kerosene, its index: specific heat capacity is lower than 2220 joules of/kilogram of Kelvins;
D. described pressure transmitting medium is changed pipeline front end connection pressure transmitting medium source, Bonding pressure chamber, rear end, and valve two ends connect respectively pressure transmitting medium and change pipeline; Vent valve one end is connected on pressure chamber, and outlet connects extraneous.
6. the pressure transducer dynamic calibration apparatus that the Step Pressure production method based on high energy pulse laser according to claim 1 forms, is characterised in that: this described dynamic calibration apparatus includes the high energy pulse laser beam of high energy pulse laser and generation thereof, pressure chamber and on high pressure resistant light inlet window, pressure transmitting medium, pressure transmitting medium is changed pipeline, valve, vent valve, standard pressure transducer, be calibrated pressure transducer, temperature sensor, signal cable, data acquisition mechanism, this dynamic calibration apparatus adopts high energy pulse laser transmitting high energy pulse laser beam, through high pressure resistant light inlet window, inject in airtight pressure chamber, now heated pressure transmitting medium molecular thermalmotion aggravation in pressure chamber, pressure chamber walls is produced to pressure, this pressure is Step Pressure signal, in pressure chamber walls outside, connects respectively standard pressure transducer, be calibrated pressure transducer, each signal input part of temperature sensor, with signal cable difference connection standard pressure transducer, be calibrated pressure transducer, each signal output part of temperature sensor, to data acquisition mechanism, adopts the Step Pressure signal on the wall of input pressure chamber, through standard pressure transducer, be calibrated pressure transducer and measure comparison, complete being calibrated the dynamic calibration of pressure transducer.
7. pressure transducer dynamic calibration apparatus according to claim 6, is characterised in that:
A. described high energy pulse laser index is selected single pulse energy to be greater than 10 joules, monopulse duration and was less than for 30 nanoseconds;
B. the detailed structure of described pressure chamber is spheroid or square or rectangular parallelepiped, and its volume is selected 0.1 cubic metre ~ 0.5 cubic metre, and pressure chamber withstand voltage is greater than 800 MPas; The index selection withstand voltage of described high pressure resistant light inlet window is greater than 800 MPas, transmittance is greater than 91%;
C. described pressure transmitting medium is liquid, selects glycerine or kerosene, its index: specific heat capacity is lower than 2220 joules of/kilogram of Kelvins;
D. described pressure transmitting medium is changed pipeline front end connection pressure transmitting medium source, Bonding pressure chamber, rear end, and valve two ends connect respectively pressure transmitting medium and change pipeline; Vent valve one end is connected on pressure chamber, and outlet connects extraneous;
E. described standard pressure transducer is selected piezoelectric pressure indicator or piezoresistive pressure sensor; The described pressure transducer that is calibrated is piezoelectric pressure indicator or piezoresistive pressure sensor; Described temperature sensor is selected platinum rhodium thermocouple;
F. described data acquisition mechanism is selected by computing machine and data collecting card, electric charge prover, and operating system and the data processing software structure that forms a complete set of.
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| CN107421680A (en) * | 2017-07-31 | 2017-12-01 | 江苏大学 | Hydraulic oil impact force measurements devices and methods therefor under laser-impact |
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| CN109282942A (en) * | 2018-12-03 | 2019-01-29 | 中国人民解放军92493部队计量测试研究所 | A kind of pressure sensor high temperature dynamic calibration apparatus |
| CN109946020A (en) * | 2019-02-23 | 2019-06-28 | 山东大学 | A kind of test of rapidity pressure sensor dynamic and calibrating installation |
| CN111069766A (en) * | 2019-12-27 | 2020-04-28 | 北京航天计量测试技术研究所 | End cover device of driving section of laser membrane-breaking shock tube and laser-assisted membrane-breaking method |
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