CN104062070A - Spherical shock wave generation method - Google Patents
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- CN104062070A CN104062070A CN201410272879.5A CN201410272879A CN104062070A CN 104062070 A CN104062070 A CN 104062070A CN 201410272879 A CN201410272879 A CN 201410272879A CN 104062070 A CN104062070 A CN 104062070A
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Abstract
The invention discloses three technical schemes, namely a spherical shock wave generation method and device and a formed pressure sensor dynamic calibration device and belongs to the technical field of shock wave generation and pressure sensor dynamic calibration. According to the spherical shock wave generation method, a dry ice block is heated by laser radiation in a space and converted into CO2 gas instantly and swells to generate spherical shock waves. The generation device comprises a single-chip microcomputer or computer system, an ejection mechanism, a laser mechanism, a speed measuring mechanism, a high-speed photographing mechanism and the dry ice block, wherein the ejection mechanism, the laser mechanism, the speed measuring mechanism, the high-speed photographing mechanism and the dry ice block are controlled by the single-chip microcomputer or computer system. The dynamic calibration device further comprises a standard pressure sensor of a calibration mechanism, a calibrated pressure sensor, a signal cable and a data acquisition mechanism. The spherical shock waves are used as a signal source of the calibration mechanism, measurement and comparison are conducted through the standard pressure sensor and the calibrated pressure sensor, and then a dynamic calibration result of the calibrated pressure sensor is obtained. The spherical shock wave generation method and device have the advantages that the method is innovative, and ideal spherical shock waves are formed in the space. The dynamic calibration device has the advantages that tracing to the source is convenient, and dynamic calibration accuracy can be improved.
Description
Technical field
Spheric shock production method disclosed by the invention belongs to shock wave and produces technical field and pressure transducer Dynamic Calibration Technique field, and what be specifically related to is a kind of method and pressure transducer dynamic calibration apparatus that produces ideal spherical face shock wave in space.
Background technology
In cannon chamber pressuring test and explosion wave superpressure test equal pressure dynamic test field, tested pressure signal has short, the feature such as peak value is high, pulse width is narrow of rise time, and this has proposed very high requirement to testing pressure transducer performance index used.Before reality test, must carry out dynamic calibration to pressure transducer, dynamic calibration can be weighed the dynamic performance index of pressure transducer, is highly profitable for whole test.
Feature with signal can be divided into two classes by the pressure signal that dynamic calibration method was produced: the one, and Step Pressure signal, conventional calibrating installation is shock tube; The 2nd, accurate δ function pulse signal, conventional calibration cartridge is equipped with accurate δ function pulse calibrating installation under high static pressure, calibrating installation etc. drops hammer.
Shock tube calibration method is one of reliable method of generally acknowledged pressure transducer dynamic calibration, shock tube calibrating installation is to utilize the pressure reduction between shock tube internal high pressure chamber and low-pressure chamber to make the rupture of diaphragm between two Room, hyperbaric chamber gas enters rapidly low-pressure chamber and forms shock wave, shock wave is propagated in pipe, the dynamic calibration at measuring section for pressure transducer.Because shock tube calibrating installation is to produce shock wave in rupture of membranes mode, Step Pressure signal rising time is longer, and the shock wave that shock tube produces is plane wave.
The present invention utilizes Ear Mucosa Treated by He Ne Laser Irradiation heating dry ice, produces the spheric shock of approximate ideal in space, and the Step Pressure signal rising time that this spheric shock produces is shorter.Utilize the heating of high energy laser illumination to be suspended from dry ice lumps in the air, make dry ice lumps moment be converted into CO
2gas the generation spheric shock that expands; In addition, for self kinetic energy that does not make dry ice lumps affects spheric shock and adopts the method for launching straight up dry ice lumps, in the time that dry ice lumps is static, again it is irradiated to heating.As the CO of the method generation
2gas shock-wave is more close to desirable spheric shock, and the Step Pressure signal rising time that this spheric shock produces is shorter, is applied to the better effects if of pressure transducer calibration.
Summary of the invention
The object of the invention is: provide spheric shock production method and generation device thereof to society, and three technical schemes of pressure transducer dynamic calibration apparatus that form based on spheric shock production method.
Technical scheme of the present invention comprises spheric shock production method and generation device thereof, and pressure transducer dynamic calibration apparatus three parts that form based on spheric shock production method.
The present invention is such about the technical scheme of spheric shock production method: this spheric shock production method, technical characterstic is: described spheric shock production method is to be converted into CO in space utilization Ear Mucosa Treated by He Ne Laser Irradiation heating dry ice lumps moment
2the method of gas the generation spheric shock that expands.
According to above-described spheric shock production method, technical characterstic also has: described spheric shock production method is, by Single Chip Microcomputer (SCM) system or computer system control ejection mechanism, space is launched to dry ice lumps straight up, and send the irradiation of laser alignment dry ice lumps when the moment control laser light mechanism that dry ice lumps upward velocity is zero and heat, dry ice lumps gasifies rapidly to expand and produces or form the spheric shock of approximate ideal in space, in the time that dry ice lumps is static, it is irradiated to heating and has ensured to produce spheric shock from principle.
According to above-described spheric shock production method, technical characterstic also has: the detailed structure of described Single Chip Microcomputer (SCM) system or the ejection mechanism of computer system control is the carrier bar that utilizes air gun transmitting projectile impact to freeze, dry ice lumps is placed in cylindrical carrier bar upper end, carrier bar keeps temperature not higher than the temperature of dry ice lumps, ensure that dry ice lumps is shaped as regular spherical, by clashing into the stress wave producing, dry ice lumps is upwards launched, bullet and carrier bar are selected steel matter, shape is all cylindrical, circular section is long-pending to be equated and section radius R selects 1 centimetre ~ 1.5 centimetres, cylinder length L is selected 5 centimetres ~ 6.5 centimetres.
According to above-described spheric shock production method, technical characterstic also has: described Single Chip Microcomputer (SCM) system or the laser light mechanism of computer system control are yag crystal laser instruments of Single Chip Microcomputer (SCM) system or computer system control, it is Nd:YAG laser instrument, this laser instrument model TITAN 5 in this way, the moment that is zero in dry ice lumps speed is upwards controlled this yag crystal laser instrument and launches a single pulse energy and be greater than 5 joules, duration of pulse is less than the laser beam of 25 nanoseconds, single pulse energy is greater than 5 joules, duration of pulse is less than 25 nanosecond two technical indicators and can ensures dry ice lumps moment gasification.
According to above-described spheric shock production method, technical characterstic also has: the dry ice lumps of described Single Chip Microcomputer (SCM) system or computer system control transmitting is shaped as spherical, radius R is selected 6.2 millimeters ~ 6.8 millimeters, launch velocity degree v selects 4.43 meter per second ~ 5.42 meter per seconds, and launch velocity degree has determined the height that dry ice lumps can rise.
According to above-described spheric shock production method, technical characterstic also has: the Single Chip Microcomputer (SCM) system described in a. or computer system have also been controlled high-speed camera mechanism, this mechanism is mainly to form by high-speed camera, this high-speed camera writing speed was greater than for 100000 frame/seconds, in addition control in addition the controller of high-speed camera action, camera lens is with a series of concentric circles annular scales, annular scale is for measuring the velocity of wave of spheric shock, optical center is chosen as 1 meter ~ 1.5 meters apart from the height of ejection mechanism carrier bar upper end, this height is determined by dry ice lumps launch velocity degree, object is to ensure that dry ice lumps can be still in the position of high-speed camera optical center, according to public newtonian motion law, suffered air resistance when ignoring dry ice lumps and moving upward, the suffered unique external force of dry ice lumps is its gravity, by formula: v
t 2=2gh, known: initial velocity v
twhile being 4.43 meter per second, respective heights h is 1 meter, initial velocity v
twhile being 5.42 meter per second, respective heights h is 1.5 meters, and in formula, g is acceleration of gravity, launch velocity degree, highly corresponding unified with the situation before transmitting.B. described Single Chip Microcomputer (SCM) system or computer system also controlled velocity measurement mechanisms, this mechanism is mainly to form by check ultrasonic velocity meter, this ultrasonic velocity meter is measured upwards flying speed of dry ice lumps, in the time that dry ice lumps upward velocity is zero, sends and feed back signal to Single Chip Microcomputer (SCM) system or computer system, Single Chip Microcomputer (SCM) system or computer system are controlled laser light mechanism Emission Lasers irradiation dry ice lumps after receiving feedback signal immediately.
The technical scheme of the spheric shock generation device adopting about spheric shock production method is such: this spheric shock generation device, technical characterstic is: described spheric shock generation device includes: ejection mechanism, laser light mechanism, velocity measurement mechanisms, high-speed camera mechanism and the dry ice lumps of Single Chip Microcomputer (SCM) system or computer system and control thereof.
According to above-described spheric shock generation device, detailed technology feature also has: the detailed structure of the Single Chip Microcomputer (SCM) system described in a. or the ejection mechanism of computer system control is the carrier bar that utilizes air gun transmitting projectile impact to freeze, dry ice lumps is placed in cylindrical carrier bar upper end, carrier bar keeps temperature not higher than the temperature of dry ice lumps, ensure that dry ice lumps is shaped as regular spherical, by clashing into the stress wave producing, dry ice lumps is upwards launched, bullet and carrier bar are selected steel matter, shape is all cylindrical, circular section is long-pending to be equated and section radius R selects 1 centimetre ~ 1.5 centimetres, cylinder length L is selected 5 centimetres ~ 6.5 centimetres.B. described Single Chip Microcomputer (SCM) system or the laser light mechanism of computer system control are yag crystal laser instruments of Single Chip Microcomputer (SCM) system or computer system control, it is Nd:YAG laser instrument, this laser instrument model TITAN 5 in this way, the moment that is zero in dry ice lumps speed is upwards controlled this yag crystal laser instrument and launches a single pulse energy and be greater than the laser beam that 5 joules, duration of pulse were less than for 25 nanoseconds, and single pulse energy is greater than 5 joules, duration of pulse and is less than 25 nanosecond two technical indicators and can ensures the gasification of dry ice lumps moment.C. described Single Chip Microcomputer (SCM) system or computer system also controlled high-speed camera mechanism, this mechanism is mainly to form by high-speed camera, this high-speed camera writing speed was greater than for 100000 frame/seconds, in addition control in addition the controller of high-speed camera action, camera lens is with a series of concentric circles annular scales, annular scale is for measuring the velocity of wave of spheric shock, optical center is chosen as 1 meter ~ 1.5 meters apart from the height of ejection mechanism carrier bar upper end, this height is determined by dry ice lumps launch velocity degree, object is to ensure that dry ice lumps can be still in the position of high-speed camera optical center, according to public newtonian motion law, suffered air resistance when ignoring dry ice lumps and moving upward, the suffered unique external force of dry ice lumps is its gravity, by formula: v
t 2=2gh, known: initial velocity v
twhile being 4.43 meter per second, respective heights h is 1 meter, initial velocity v
twhile being 5.42 meter per second, respective heights h is 1.5 meters, and in formula, g is acceleration of gravity, launch velocity degree, height unification corresponding to situation before transmitting.D. the dry ice lumps that described Single Chip Microcomputer (SCM) system or computer system control are launched is shaped as spherical, and radius R is selected 6.2 millimeters ~ 6.8 millimeters, and launch velocity degree v selects 4.43 meter per second ~ 5.42 meter per seconds, and launch velocity degree has determined the height that dry ice lumps can rise.E. described Single Chip Microcomputer (SCM) system or computer system also controlled velocity measurement mechanisms, this mechanism is mainly to form by check ultrasonic velocity meter, this ultrasonic velocity meter is measured upwards flying speed of dry ice lumps, in the time that dry ice lumps upward velocity is zero, sends and feed back signal to Single Chip Microcomputer (SCM) system or computer system, Single Chip Microcomputer (SCM) system or computer system are controlled laser light mechanism Emission Lasers irradiation dry ice lumps after receiving feedback signal immediately.
The technical scheme of the pressure transducer dynamic calibration apparatus forming about spheric shock production method is such: the pressure transducer dynamic calibration apparatus that this spheric shock production method forms, technical characterstic is: the pressure transducer dynamic calibration apparatus that described spheric shock production method forms includes: the ejection mechanism of Single Chip Microcomputer (SCM) system or computer system and control thereof, laser light mechanism, velocity measurement mechanisms, high-speed camera mechanism, dry ice lumps, correcting mechanism, wherein correcting mechanism comprises: standard pressure transducer, be calibrated pressure transducer, signal cable, data acquisition mechanism, adopt Single Chip Microcomputer (SCM) system or computer system control ejection mechanism to launch straight up dry ice lumps to space, control laser light mechanism Emission Lasers aligning dry ice lumps irradiation heating when the moment that dry ice lumps upward velocity is zero, dry ice lumps gasifies rapidly to expand and produces or form the spheric shock of approximate ideal in space, as the Step Pressure signal source of the pressure transducer dynamic calibration of correcting mechanism, input step pressure signal is to standard pressure transducer, be calibrated pressure transducer and measure comparison, data acquisition mechanism acquisition and recording two sensors output signal, complete the dynamic calibration that is calibrated pressure transducer.Carry out the dynamic calibration of this pressure transducer according to public pressure transducer dynamic calibration method and established procedure: the pressure signal of exporting using standard pressure transducer is as input signal, using the pressure signal that is calibrated pressure transducer output 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.
According to above-described pressure transducer dynamic calibration apparatus, detailed technology feature also has: the detailed structure of the Single Chip Microcomputer (SCM) system described in a. or the ejection mechanism of computer system control is the carrier bar that utilizes air gun transmitting projectile impact to freeze, dry ice lumps is placed in cylindrical carrier bar upper end, carrier bar keeps temperature not higher than the temperature of dry ice lumps, ensure that dry ice lumps is shaped as regular spherical, by clashing into the stress wave producing, dry ice lumps is upwards launched, bullet and carrier bar are selected steel matter, shape is all cylindrical, circular section is long-pending to be equated and section radius R selects 1 centimetre ~ 1.5 centimetres, cylinder length L is selected 5 centimetres ~ 6.5 centimetres.B. described Single Chip Microcomputer (SCM) system or the laser light mechanism of computer system control are yag crystal laser instruments of Single Chip Microcomputer (SCM) system or computer system control, it is Nd:YAG laser instrument, this laser instrument model TITAN 5 in this way, the moment that is zero at dry ice lumps upward velocity is controlled this yag crystal laser instrument and launches a single pulse energy and be greater than the laser beam that 5 joules, duration of pulse were less than for 25 nanoseconds, and single pulse energy is greater than 5 joules, duration of pulse and is less than 25 nanosecond two technical indicators and can ensures the gasification of dry ice lumps moment.C. described Single Chip Microcomputer (SCM) system or computer system also controlled high-speed camera mechanism, this mechanism is mainly to form by high-speed camera, this high-speed camera writing speed was greater than for 100000 frame/seconds, in addition control in addition the controller of high-speed camera action, camera lens is with a series of concentric circles annular scales, annular scale is for measuring the velocity of wave of spheric shock, optical center is chosen as 1 meter ~ 1.5 meters apart from the height of ejection mechanism carrier bar upper end, this height is determined by dry ice lumps launch velocity degree, object is to ensure that dry ice lumps can be still in the position of high-speed camera optical center, according to public newtonian motion law, suffered air resistance when ignoring dry ice lumps and moving upward, the suffered unique external force of dry ice lumps is its gravity, by formula: v
t 2=2gh, known: initial velocity v
twhile being 4.43 meter per second, respective heights h is 1 meter, initial velocity v
twhile being 5.42 meter per second, respective heights h is 1.5 meters, and in formula, g is acceleration of gravity, launch velocity degree, height unification corresponding to situation before transmitting.D. the dry ice lumps that described Single Chip Microcomputer (SCM) system or computer system control are launched is shaped as spherical, and radius R is selected 6.2 millimeters ~ 6.8 millimeters, and launch velocity degree v selects 4.43 meter per second ~ 5.42 meter per seconds, and launch velocity degree has determined the height that dry ice lumps can rise.E. described Single Chip Microcomputer (SCM) system or computer system also controlled velocity measurement mechanisms, this mechanism is mainly to form by check ultrasonic velocity meter, this ultrasonic velocity meter is measured upwards flying speed of dry ice lumps, in the time that dry ice lumps upward velocity is zero, sends and feed back signal to Single Chip Microcomputer (SCM) system or computer system, Single Chip Microcomputer (SCM) system or computer system are controlled laser light mechanism Emission Lasers irradiation dry ice lumps after receiving feedback signal immediately.F. the standard pressure transducer of described correcting mechanism is selected piezoelectric pressure indicator or piezoresistive pressure sensor; The described pressure transducer that is calibrated is piezoelectric pressure indicator or piezoresistive pressure sensor.G. the data acquisition mechanism of described correcting 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, in the time that sensor is selected piezoelectric pressure indicator, use electric charge prover to carry out Signal Matching and send into data collecting card acquisition and recording, in the time that sensor is selected piezoresistive pressure sensor, output signal is directly sent into data collecting card acquisition and recording.
Spheric shock production method of the present invention and generation device advantage have: formed desirable spheric shock in space 1.; 2. method innovation, the spheric shock of generation approaches true explosion wave.The pressure transducer dynamic calibration apparatus advantage that spheric shock production method of the present invention forms has: be convenient to trace to the source, can improve dynamic calibration precision.This spheric shock production method and generation device, and the pressure transducer dynamic calibration apparatus that spheric shock production method forms is worth adopting and promoting.
Brief description of the drawings
Figure of description of the present invention has 8 width:
Fig. 1 is spheric shock generation device structural representation, and wherein dry ice lumps does not launch;
Fig. 2 is spheric shock generation device structural representation, and wherein dry ice lumps upwards launches;
Fig. 3 is spheric shock generation device structural representation, and wherein the dry ice lumps speed of moving upward is 0, now Ear Mucosa Treated by He Ne Laser Irradiation heating dry ice lumps;
Fig. 4 is spheric shock generation device structural representation, and dry ice lumps gasification forms spheric shock;
Fig. 5 is spheric shock generation device structured flowchart;
Fig. 6 is ejection mechanism detailed structure schematic diagram;
Fig. 7 is correcting mechanism detailed structure schematic diagram, wherein 405 beat the Step Pressure signal forming for spheric shock on pressure transducer sensitive area, this signal is as the input signal of pressure transducer dynamic calibration, Step Pressure signal horizontal ordinate is the time, unit is microsecond μ s, ordinate is pressure, and unit is MPa MPa;
Fig. 8 is high-speed camera camera lens annular scale schematic diagram, and unit is millimeter mm.
In each figure, adopted unified label, same object is used same label in each figure.In each figure: 1. Single Chip Microcomputer (SCM) system or computer system; 2. velocity measurement mechanisms; 3. laser light mechanism; 4. correcting mechanism; 5. high-speed camera mechanism; 6. ejection mechanism; 7. dry ice lumps; 8. spheric shock; 401. are calibrated pressure transducer; 402. standard pressure transducer; 403. signal cable; 404. data acquisition mechanisms; 405. Step Pressure signals; 601. carrier bar; 602. bullet.
Embodiment
Embodiments of the invention have three parts: the first is about the embodiment of spheric shock production method, and it two is embodiment about spheric shock generation device, and it three is embodiment of the pressure transducer dynamic calibration apparatus that forms about spheric shock production method
Part I is as follows about the non-limiting examples of spheric shock production method:
Embodiment mono-. spheric shock production method
This routine spheric shock production method can be combined and be illustrated or illustrate by Fig. 1～Fig. 6, Fig. 8.Referring to Fig. 1～Fig. 6, the utensil that spheric shock production method adopts includes: Single Chip Microcomputer (SCM) system or computer system 1, velocity measurement mechanisms 2, laser light mechanism 3, high-speed camera mechanism 5, ejection mechanism 6, dry ice lumps 7.Referring to Fig. 6, the detailed structure of this routine ejection mechanism 6 comprises bullet 602 and carrier bar 601, dry ice lumps 7 is placed in carrier bar 601 upper ends, bullet 602 is selected steel matter with carrier bar 601, shape is all cylindrical, circular section is long-pending to be equated and section radius R=1 centimetre, cylinder length L=5 centimetre, this routine laser light mechanism 3 is yag crystal laser instruments that Single Chip Microcomputer (SCM) system or computer system 1 are controlled, it is Nd:YAG laser instrument, this laser instrument model TITAN 5 in this way, the moment that is zero at dry ice lumps 7 upward velocities is controlled this yag crystal laser instrument and launches a single pulse energy and be greater than 5 joules, duration of pulse is less than the laser beam irradiation dry ice lumps 7 of 25 nanoseconds.The dry ice lumps 7 of this example control transmitting is shaped as spherical, radius R=6.2 millimeter, launch velocity degree v=4.43 meter per second, this routine high-speed camera mechanism 5 is mainly to form by high-speed camera, this high-speed camera writing speed was greater than for 100000 frame/seconds, and camera lens is with a series of concentric circles annular scales, and scale unit is millimeter mm, referring to Fig. 8, optical center is 1 meter apart from the height of ejection mechanism 6 carrier bar 601 upper ends.This routine velocity measurement mechanisms 2 is mainly to form by check ultrasonic velocity meter.Control the ejection mechanism 6 blackberry lily ice cube 7 that upsprings by Single Chip Microcomputer (SCM) system or computer system 1, measure upwards flying speed of dry ice lumps 7 by velocity measurement mechanisms 2, in the time that dry ice lumps 7 upward velocities are zero, send and feed back signal to Single Chip Microcomputer (SCM) system or computer system 1, now Single Chip Microcomputer (SCM) system or computer system 1 are controlled laser light mechanism 3 Emission Lasers bundles irradiation heating dry ice lumps 7, and 7 moments of dry ice lumps are converted into CO
2gas the generation spheric shock 8 that expands, high-speed camera mechanism 5 is for measuring the velocity of wave of spheric shock 8.
Embodiment bis-. spheric shock production method
This routine spheric shock production method can be combined and be illustrated by Fig. 1～Fig. 6, Fig. 8.The spheric shock production method that this is routine and embodiment mono-spheric shock production method difference have: 1. this routine bullet 602 and section radius R=1.5 centimetre, cylinder length L=6.5 centimetre of carrier bar 601; 2. dry ice lumps 7 radius R=6.8 millimeter of this example control transmitting, launch velocity degree v=5.42 meter per second; 3. optical center is 1.5 meters apart from the height of ejection mechanism 6 carrier bar 601 upper ends.All the other do not state this routine spheric shock production method, are entirely same as embodiment mono-. described in, no longer repeat.
Embodiment tri-. spheric shock production method
This routine spheric shock production method can be combined and be illustrated by Fig. 1～Fig. 6, Fig. 8.The spheric shock production method difference of the spheric shock production method that this is routine and embodiment mono-, embodiment bis-has: 1. this routine bullet 602 and section radius R=1.25 centimetre, cylinder length L=5.75 centimetre of carrier bar 601; 2. dry ice lumps 7 radius R=6.5 millimeter of this example control transmitting, launch velocity degree v=4.925 meter per second; 3. optical center is 1.23 meters apart from the height of ejection mechanism 6 carrier bar 601 upper ends.All the other do not state this routine spheric shock production method, are entirely same as described in embodiment mono-, embodiment bis-, no longer repeat.
Part II is as follows about the non-limiting examples of spheric shock generation device:
Embodiment mono-. spheric shock generation device
This routine spheric shock generation device can be combined and be illustrated or illustrate by Fig. 1～Fig. 6, Fig. 8.Referring to Fig. 1～Fig. 5, spheric shock generation device includes: Single Chip Microcomputer (SCM) system or computer system 1, velocity measurement mechanisms 2, laser light mechanism 3, high-speed camera mechanism 5, ejection mechanism 6, dry ice lumps 7.Referring to Fig. 6, the detailed structure of this routine ejection mechanism 6 comprises bullet 602 and carrier bar 601, dry ice lumps 7 is placed in carrier bar 601 upper ends, bullet 602 is selected steel matter with carrier bar 601, shape is all cylindrical, circular section is long-pending to be equated and section radius R=1 centimetre, cylinder length L=5 centimetre, this routine laser light mechanism 3 is yag crystal laser instruments that Single Chip Microcomputer (SCM) system or computer system 1 are controlled, it is Nd:YAG laser instrument, this laser instrument model TITAN 5 in this way, the moment that is zero in dry ice lumps 7 speed is upwards controlled this yag crystal laser instrument and launches a single pulse energy and be greater than 5 joules, duration of pulse is less than the laser beam irradiation dry ice lumps 7 of 25 nanoseconds.This routine high-speed camera mechanism 5 is mainly to form by high-speed camera, this high-speed camera writing speed was greater than for 100000 frame/seconds, and camera lens is with a series of concentric circles annular scales, and scale unit is millimeter mm, referring to Fig. 8, optical center is 1 meter apart from the height of ejection mechanism 6 carrier bar 601 upper ends.The dry ice lumps 7 of this example control transmitting is shaped as spherical, radius R=6.2 millimeter, launch velocity degree v=4.43 meter per second.This routine velocity measurement mechanisms 2 is mainly to form by check ultrasonic velocity meter.Control the ejection mechanism 6 blackberry lily ice cube 7 that upsprings by Single Chip Microcomputer (SCM) system or computer system 1, measure upwards flying speed of dry ice lumps 7 by velocity measurement mechanisms 2, in the time that dry ice lumps 7 upward velocities are zero, send and feed back signal to Single Chip Microcomputer (SCM) system or computer system 1, now Single Chip Microcomputer (SCM) system or computer system 1 are controlled laser light mechanism 3 Emission Lasers bundles irradiation heating dry ice lumps 7, and 7 moments of dry ice lumps are converted into CO
2gas the generation spheric shock 8 that expands, high-speed camera mechanism 5 is for measuring the velocity of wave of spheric shock 8.
Embodiment bis-. spheric shock generation device
This routine spheric shock generation device can be combined and be illustrated by Fig. 1～Fig. 6, Fig. 8.The spheric shock generation device that this is routine and embodiment mono-spheric shock generation device difference have: 1. this routine bullet 602 and section radius R=1.5 centimetre, cylinder length L=6.5 centimetre of carrier bar 601; 2. dry ice lumps 7 radius R=6.8 millimeter of this example control transmitting, launch velocity degree v=5.42 meter per second; 3. optical center is 1.5 meters apart from the height of ejection mechanism 6 carrier bar 601 upper ends.All the other do not state this routine spheric shock generation device, are entirely same as embodiment mono-. described in, no longer repeat.
Embodiment tri-. spheric shock generation device
This routine spheric shock generation device can be combined and be illustrated by Fig. 1～Fig. 6, Fig. 8.The spheric shock generation device difference of the spheric shock generation device that this is routine and embodiment mono-, embodiment bis-has: 1. this routine bullet 602 and section radius R=1.25 centimetre, cylinder length L=5.75 centimetre of carrier bar 601; 2. dry ice lumps 7 radius R=6.5 millimeter of this example control transmitting, launch velocity degree v=4.925 meter per second; 3. optical center is 1.23 meters apart from the height of ejection mechanism 6 carrier bar 601 upper ends.All the other do not state this routine spheric shock generation device, 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 Part III forms about spheric shock production method is as follows:
Embodiment mono-. the pressure transducer dynamic calibration apparatus that spheric shock production method forms
The pressure transducer dynamic calibration apparatus that this routine spheric shock production method forms can be combined and be illustrated or illustrate by Fig. 1～Fig. 8.Referring to Fig. 1～Fig. 5, the pressure transducer dynamic calibration apparatus forming about spheric shock production method includes: Single Chip Microcomputer (SCM) system or computer system 1, velocity measurement mechanisms 2, laser light mechanism 3, high-speed camera mechanism 5, ejection mechanism 6, dry ice lumps 7, correcting mechanism 4, wherein correcting mechanism 4 comprises: standard pressure transducer 402, be calibrated pressure transducer 401, signal cable 403, data acquisition mechanism 404.Referring to Fig. 6, the detailed structure of this routine ejection mechanism 6 comprises bullet 602 and carrier bar 601, dry ice lumps 7 is placed in carrier bar 601 upper ends, bullet 602 is selected steel matter with carrier bar 601, shape is all cylindrical, circular section is long-pending to be equated and section radius R=1 centimetre, cylinder length L=5 centimetre, this routine laser light mechanism 3 is yag crystal laser instruments that Single Chip Microcomputer (SCM) system or computer system 1 are controlled, it is Nd:YAG laser instrument, this laser instrument model TITAN 5 in this way, the moment that is zero at dry ice lumps 7 upward velocities is controlled this yag crystal laser instrument and launches a single pulse energy and be greater than 5 joules, duration of pulse is less than the laser beam irradiation dry ice lumps 7 of 25 nanoseconds.This routine high-speed camera mechanism 5 is mainly to form by high-speed camera, this high-speed camera writing speed was greater than for 100000 frame/seconds, camera lens is with a series of concentric circles annular scales, scale unit is millimeter mm, referring to Fig. 8, optical center is 1 meter apart from the height of ejection mechanism 6 carrier bar 601 upper ends, and the dry ice lumps 7 of this example control transmitting is shaped as spherical, radius R=6.2 millimeter, launch velocity degree v=4.43 meter per second.This routine velocity measurement mechanisms 2 is mainly to form by check ultrasonic velocity meter.Referring to Fig. 7, standard pressure transducer in correcting mechanism 4 402 be calibrated pressure transducer 401 and select piezoelectric pressure indicator, data acquisition mechanism 404 is selected by computing machine and data collecting card, electric charge prover, and the structure that forms a complete set of of operating system and data processing software, Step Pressure signal 405 forms on pressure transducer 401 sensitive areas with being calibrated in standard pressure transducer 402 for 8 dozens of spheric shocks.Control the ejection mechanism 6 blackberry lily ice cube 7 that upsprings by Single Chip Microcomputer (SCM) system or computer system 1, measure upwards flying speed of dry ice lumps 7 by velocity measurement mechanisms 2, in the time that dry ice lumps 7 upward velocities are zero, send and feed back signal to Single Chip Microcomputer (SCM) system or computer system 1, now Single Chip Microcomputer (SCM) system or computer system 1 are controlled laser light mechanism 3 Emission Lasers bundles irradiation heating dry ice lumps 7, and 7 moments of dry ice lumps are converted into CO
2gas the generation spheric shock 8 that expands, high-speed camera mechanism 5 is for measuring the velocity of wave of spheric shock 8.Carry out pressure transducer dynamic calibration of the present invention according to public pressure transducer dynamic calibration method and established procedure: Step Pressure signal 405 is inputted respectively standard pressure transducer 402, be calibrated pressure transducer 401 signal input parts, with signal cable 403 connection standard pressure transducer 402 respectively, be calibrated pressure transducer 401 signal output parts to data acquisition mechanism 404, adopt input step pressure signal 405, through standard pressure transducer 402, be calibrated pressure transducer 401 and measure comparison, complete the dynamic calibration to being calibrated pressure transducer 401.The pressure signal of exporting using standard pressure transducer 402 is as input signal, using the pressure signal of output that is calibrated pressure transducer 401 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 401, obtain its dynamic calibration result.Be calibrated pressure transducer 401 and after the conversion of electric charge prover, be connected to data collecting card by signal cable 403 with standard pressure transducer 402 the two output signal and carry out acquisition and recording, dynamic calibration result can demonstration on the included computing machine of data acquisition mechanism 404, analysis, record.
Embodiment bis-. the pressure transducer dynamic calibration apparatus that spheric shock production method forms
The pressure transducer dynamic calibration apparatus that this routine spheric shock production method forms can be combined and be illustrated or illustrate by Fig. 1～Fig. 8.The pressure transducer dynamic calibration apparatus difference of the pressure transducer dynamic calibration apparatus that this is routine and embodiment mono-has: 1. this routine bullet 602 and section radius R=1.5 centimetre, cylinder length L=6.5 centimetre of carrier bar 601; 2. dry ice lumps 7 radius R=6.8 millimeter of this example control transmitting, launch velocity degree v=5.42 meter per second; 3. optical center is 1.5 meters apart from the height of ejection mechanism 6 carrier bar 601 upper ends; Standard pressure transducer in correcting mechanism 4 402 be calibrated pressure transducer 401 and select piezoresistive pressure sensor, data acquisition mechanism 404 is selected by computing machine and data collecting card, and the structure that forms a complete set of of operating system and data processing software, directly connect by signal cable 403 output terminal to the data collecting card that is calibrated pressure transducer 401, standard pressure transducer 402 and carry out output signal acquisition and recording.All the other do not state the pressure transducer dynamic calibration apparatus that this routine spheric shock production method forms, and are entirely same as embodiment mono-. described in, no longer repeat.
Embodiment tri-. the pressure transducer dynamic calibration apparatus that spheric shock production method forms
The pressure transducer dynamic calibration apparatus that this routine spheric shock production method forms can be combined and be illustrated or illustrate by Fig. 1～Fig. 8.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. this routine bullet 602 and section radius R=1.25 centimetre, cylinder length L=5.75 centimetre of carrier bar 601; 2. dry ice lumps 7 radius R=6.5 millimeter of this example control transmitting, launch velocity degree v=4.925 meter per second; 3. optical center is 1.23 meters apart from the height of ejection mechanism 6 carrier bar 601 upper ends.All the other do not state the pressure transducer dynamic calibration apparatus that this routine spheric shock production method forms, and are entirely same as described in embodiment mono-, embodiment bis-, no longer repeat.
Claims (10)
1. a spheric shock production method, is characterised in that: described spheric shock production method is to be converted into CO in space utilization Ear Mucosa Treated by He Ne Laser Irradiation heating dry ice lumps moment
2the method of gas the generation spheric shock that expands.
2. spheric shock production method according to claim 1, be characterised in that: described spheric shock production method is, by Single Chip Microcomputer (SCM) system or computer system control ejection mechanism, space is launched to dry ice lumps straight up, and sending laser alignment dry ice lumps irradiation heating when the moment control laser light mechanism that dry ice lumps upward velocity is zero, dry ice lumps gasifies rapidly, and expansion produces in space or the spheric shock of formation approximate ideal.
3. spheric shock production method according to claim 2, be characterised in that: the detailed structure of described Single Chip Microcomputer (SCM) system or the ejection mechanism of computer system control is the carrier bar that utilizes air gun transmitting projectile impact to freeze, dry ice lumps is placed in cylindrical carrier bar upper end, by clashing into the stress wave producing, dry ice lumps is upwards launched, bullet and carrier bar select steel matter, shape to be all that cylindrical, circular section is long-pending to be equated and 1 centimetre ~ 1.5 centimetres of section radius R selections, 5 centimetres ~ 6.5 centimetres of cylinder length L selections.
4. spheric shock production method according to claim 2, be characterised in that: described Single Chip Microcomputer (SCM) system or the laser light mechanism of computer system control are yag crystal laser instruments of Single Chip Microcomputer (SCM) system or computer system control, the moment that is zero at dry ice lumps upward velocity is controlled this yag crystal laser instrument and launches a single pulse energy and be greater than the laser beam that 5 joules, duration of pulse were less than for 25 nanoseconds.
5. spheric shock production method according to claim 2, be characterised in that: the dry ice lumps of described Single Chip Microcomputer (SCM) system or computer system control transmitting is shaped as spherical, radius R is selected 6.2 millimeters ~ 6.8 millimeters, and launch velocity degree v selects 4.43 meter per second ~ 5.42 meter per seconds.
6. spheric shock production method according to claim 2, is characterised in that:
A. described Single Chip Microcomputer (SCM) system or computer system also controlled high-speed camera mechanism, this mechanism is mainly to form by high-speed camera, this high-speed camera writing speed was greater than for 100000 frame/seconds, camera lens is with a series of concentric circles annular scales, and optical center is chosen as 1 meter ~ 1.5 meters apart from the height of ejection mechanism carrier bar upper end;
B. described Single Chip Microcomputer (SCM) system or computer system also controlled velocity measurement mechanisms, this mechanism is mainly to form by check ultrasonic velocity meter, this ultrasonic velocity meter is measured upwards flying speed of dry ice lumps, in the time that dry ice lumps upward velocity is zero, sends and feeds back signal to Single Chip Microcomputer (SCM) system or computer system.
7. the spheric shock generation device that spheric shock production method according to claim 1 adopts, is characterised in that: described spheric shock generation device includes: ejection mechanism, laser light mechanism, velocity measurement mechanisms, high-speed camera mechanism and the dry ice lumps of Single Chip Microcomputer (SCM) system or computer system and control thereof.
8. spheric shock generation device according to claim 7, is characterised in that: described spheric shock generation device:
A. the detailed structure of the ejection mechanism of described Single Chip Microcomputer (SCM) system or computer system control is the carrier bar that utilizes air gun transmitting projectile impact to freeze, dry ice lumps is placed in cylindrical carrier bar upper end, by clashing into the stress wave producing, dry ice lumps is upwards launched, bullet and carrier bar select steel matter, shape to be all that cylindrical, circular section is long-pending to be equated and 1 centimetre ~ 1.5 centimetres of section radius R selections, 5 centimetres ~ 6.5 centimetres of cylinder length L selections;
B. described Single Chip Microcomputer (SCM) system or the laser light mechanism of computer system control are yag crystal laser instruments of Single Chip Microcomputer (SCM) system or computer system control, and the moment that is zero at dry ice lumps upward velocity is controlled this yag crystal laser instrument and launches a single pulse energy and be greater than the laser beam that 5 joules, duration of pulse were less than for 25 nanoseconds;
C. described Single Chip Microcomputer (SCM) system or computer system also controlled high-speed camera mechanism, this mechanism is mainly to form by high-speed camera, this high-speed camera writing speed was greater than for 100000 frame/seconds, camera lens is with a series of concentric circles annular scales, and optical center is chosen as 1 meter ~ 1.5 meters apart from the height of ejection mechanism carrier bar upper end;
D. the dry ice lumps that described Single Chip Microcomputer (SCM) system or computer system control are launched is shaped as spherical, and radius R is selected 6.2 millimeters ~ 6.8 millimeters, and launch velocity degree v is chosen as 4.43 meter per second ~ 5.42 meter per seconds;
E. described Single Chip Microcomputer (SCM) system or computer system also controlled velocity measurement mechanisms, this mechanism is mainly to form by check ultrasonic velocity meter, this ultrasonic velocity meter is measured upwards flying speed of dry ice lumps, in the time that dry ice lumps upward velocity is zero, sends and feeds back signal to Single Chip Microcomputer (SCM) system or computer system.
9. the dynamic calibration apparatus of the pressure transducer that spheric shock production method according to claim 1 forms, be characterised in that: the dynamic calibration apparatus of described pressure transducer includes: the ejection mechanism of Single Chip Microcomputer (SCM) system or computer system and control thereof, laser light mechanism, velocity measurement mechanisms, high-speed camera mechanism, dry ice lumps, correcting mechanism, wherein correcting mechanism comprises: standard pressure transducer, be calibrated pressure transducer, signal cable, data acquisition mechanism, adopt Single Chip Microcomputer (SCM) system or computer system control ejection mechanism to launch straight up dry ice lumps to space, control laser light mechanism Emission Lasers aligning dry ice lumps irradiation heating when the moment that dry ice lumps upward velocity is zero, dry ice lumps gasifies rapidly to expand and produces or form the spheric shock of approximate ideal in space, as the Step Pressure signal source of the pressure transducer dynamic calibration of correcting mechanism, input step pressure signal is to standard pressure transducer, be calibrated pressure transducer and measure comparison, data acquisition mechanism acquisition and recording two sensors output signal, complete the dynamic calibration that is calibrated pressure transducer.
10. the dynamic calibration apparatus of pressure transducer according to claim 9, is characterised in that: the dynamic calibration apparatus of described pressure transducer:
A. the detailed structure of the ejection mechanism of described Single Chip Microcomputer (SCM) system or computer system control is the carrier bar that utilizes air gun transmitting projectile impact to freeze, dry ice lumps is placed in cylindrical carrier bar upper end, by clashing into the stress wave producing, dry ice lumps is upwards launched, bullet and carrier bar select steel matter, shape to be all that cylindrical, circular section is long-pending to be equated and 1 centimetre ~ 1.5 centimetres of section radius R selections, 5 centimetres ~ 6.5 centimetres of cylinder length L selections;
B. described Single Chip Microcomputer (SCM) system or the laser light mechanism of computer system control are yag crystal laser instruments of Single Chip Microcomputer (SCM) system or computer system control, and the moment that is zero at dry ice lumps upward velocity is controlled this yag crystal laser instrument and launches a single pulse energy and be greater than the laser beam that 5 joules, duration of pulse were less than for 25 nanoseconds;
C. described Single Chip Microcomputer (SCM) system or computer system also controlled high-speed camera mechanism, this mechanism is mainly to form by high-speed camera, this high-speed camera writing speed was greater than for 100000 frame/seconds, camera lens is with a series of concentric circles annular scales, and optical center is chosen as 1 meter ~ 1.5 meters apart from the height of ejection mechanism carrier bar upper end;
D. the dry ice lumps that described Single Chip Microcomputer (SCM) system or computer system control are launched is shaped as spherical, and radius R is selected 6.2 millimeters ~ 6.8 millimeters, and launch velocity degree v is chosen as 4.43 meter per second ~ 5.42 meter per seconds;
E. described Single Chip Microcomputer (SCM) system or computer system also controlled velocity measurement mechanisms, this mechanism is mainly to form by check ultrasonic velocity meter, this ultrasonic velocity meter is measured upwards flying speed of dry ice lumps, in the time that dry ice lumps upward velocity is zero, sends and feeds back signal to Single Chip Microcomputer (SCM) system or computer system;
F. the standard pressure transducer of described correcting mechanism is selected piezoelectric pressure indicator or piezoresistive pressure sensor; The described pressure transducer that is calibrated is piezoelectric pressure indicator or piezoresistive pressure sensor;
G. the data acquisition mechanism of described correcting 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106404334A (en) * | 2016-09-19 | 2017-02-15 | 中国科学技术大学 | Method of obtaining spherical converging shock wave |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2605482Y (en) * | 2003-03-21 | 2004-03-03 | 董勇强 | Gas shock-wave generating device |
| CN203178022U (en) * | 2013-03-27 | 2013-09-04 | 浙江理工大学 | A direct measuring apparatus of the unstable-state force of the interaction between a shock wave and a model sphere |
| CN103480559A (en) * | 2013-09-24 | 2014-01-01 | 常州和仕达电子科技有限公司 | Shock wave generating device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2605482Y (en) * | 2003-03-21 | 2004-03-03 | 董勇强 | Gas shock-wave generating device |
| CN203178022U (en) * | 2013-03-27 | 2013-09-04 | 浙江理工大学 | A direct measuring apparatus of the unstable-state force of the interaction between a shock wave and a model sphere |
| CN103480559A (en) * | 2013-09-24 | 2014-01-01 | 常州和仕达电子科技有限公司 | Shock wave generating device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106404334A (en) * | 2016-09-19 | 2017-02-15 | 中国科学技术大学 | Method of obtaining spherical converging shock wave |
| CN106404334B (en) * | 2016-09-19 | 2018-12-14 | 中国科学技术大学 | A method of it obtaining spherical surface and converges shock wave |
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