Temperature and particle size synchronous measuring device and method for electric explosion of metal wire

Abstract

The invention discloses a temperature and particle size synchronous measurement device and method for electrical explosion of a metal wire, and belongs to the field of electrical explosion, the device comprises a multi-wavelength laser system, a laser beam combination module, a first beam splitter, an active detection optical system, a reference optical system, a passive detection optical system, an upper computer, a synchronous control circuit and an explosion signal collector; the first beam splitter and the active detection optical system are used for being arranged on the two sides of an explosive body, the upper computer is connected with the synchronous control circuit, and the multi-wavelength laser system, the active detection optical system, the reference optical system and the passive detection optical system are all connected with the synchronous control circuit; the explosion signal collector is used for collecting the detonation time of an explosion body, and the upper computer is used for controlling the multi-wavelength laser system, the active detection optical system, the reference optical system and the passive detection optical system to work synchronously through the synchronous control circuit according to the detonation time. Therefore, the temperature and the particle size of the explosive body in the electric explosion process can be measured synchronously.

Description

Technical Field

[0001] The invention belongs to the technical field of electric explosion, and in particular relates to a device and method for synchronously measuring temperature and particle size for electric explosion of metal wires. Background Art

[0002] The metal wire electric explosion method is one of the important technologies for preparing metal nanopowders. Its principle is to use fast pulsed large current to quickly heat the metal wire to an extremely high temperature and undergo drastic physical and chemical changes. The metal wire instantly undergoes a phase change from solid to liquid to gas and then to plasma, and finally generates nanopowders. The metal wire electric explosion has a wide range of applications in Z pinch, X-ray, nanomaterial production, inertial confinement fusion and other fields.

[0003] During the electric explosion of metal wire, changes in temperature and particle size are important factors affecting the quality and application effect of nanopowders. Temperature directly affects the gasification rate of the metal wire and the composition of the explosion products, which in turn affects the particle size and structure of the nanopowders formed by condensation. At the same time, the size of the dust particles in the explosion products not only affects the specific surface area of ​​the nanopowder, but is also closely related to its sintering performance, fluidity and other process parameters. Therefore, real-time monitoring of the changes in temperature and particle size during the electric explosion process is crucial for optimizing the preparation process of nanopowders.

[0004] Since the temperature and particle size distribution of the explosive body change dramatically, rapidly and complexly during the electric explosion, it is difficult to monitor the temperature and particle size of the explosive body in real time during the electric explosion. At present, optical radiation pyrometers are often used to measure the temperature of the explosive body. However, this structure can only measure the average temperature of the explosive body, and cannot accurately measure the temperature of the explosive body at a specific moment and the change of the temperature of the explosive body. At present, electron microscopes are often used to observe the morphology and particle size of the explosive powder after the explosion. However, this structure can only detect the powder after the explosion, and cannot measure the particle size of the explosive powder and the change of the particle size of the explosive powder in real time, which leads to large measurement errors in the temperature and particle size of the explosive body during the electric explosion. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides a device and method for synchronously measuring the temperature and particle size of metal wire electric explosion. The technical problem to be solved by the present invention is achieved by the following technical solutions:

[0006] In a first aspect, the present invention provides a synchronous temperature and particle size measurement device for metal wire electric explosion, comprising a multi-wavelength laser system, a laser beam combining module, a first beam splitter, an active detection optical system, a reference optical system, a passive detection optical system, a host computer, a synchronous control circuit, and an explosion signal collector;

[0007] The first beam splitter and the active detection optical system are used to be arranged on both sides of the explosion body, the host computer is connected to the synchronous control circuit, and the multi-wavelength laser system, the active detection optical system, the reference optical system and the passive detection optical system are all connected to the synchronous control circuit;

[0008] The multi-wavelength laser system is used to emit multiple laser beams with different wavelengths. The multiple laser beams are combined into one laser beam by a laser beam combining module. The combined laser beams are split into a first light beam and a second light beam by a first beam splitter. The first light beam enters the active detection optical system through the explosive body, and the second light beam enters the reference optical system. The passive detection optical system is used to capture the radiation light intensity distribution of the explosive body at the moment of electrical explosion.

[0009] The explosion signal collector is used to collect the detonation time of the explosive body. The host computer is used to control the synchronous operation of the multi-wavelength laser system, the active detection optical system, the reference optical system and the passive detection optical system through the synchronous control circuit according to the detonation time.

[0010] In one embodiment of the present invention, the multi-wavelength laser system includes three single-wavelength lasers, which respectively emit a first laser, a second laser, and a third laser, and the wavelengths of the first laser, the second laser, and the third laser are different;

[0011] The laser beam combining module includes a first reflector, a second reflector and a first beam combining mirror. The first laser is reflected to the first beam combining mirror by the first reflector, the third laser is reflected to the first beam combining mirror by the second reflector, the second laser is directly projected to the first beam combining mirror, and the first laser, the second laser and the third laser are combined into one laser beam by the first beam combining mirror.

[0012] The passive detection optical system is arranged toward the explosive body.

[0013] In one embodiment of the present invention, a second beam splitter is further included, the multi-wavelength laser system includes a dual-wavelength laser and a single-wavelength laser, the dual-wavelength laser is used to emit a first laser and a second laser, the single-wavelength laser is used to emit a third laser, and the wavelengths of the first laser, the second laser and the third laser are different;

[0014] The laser beam combining module includes a fourth reflector and a second beam combining mirror. The first laser and the second laser are directly projected onto the second beam combining mirror. The third laser is reflected by the fourth reflector to the second beam combining mirror. The first laser, the second laser and the third laser are combined into one laser beam by the second beam combining mirror.

[0015] The first beam splitter and the second beam splitter are arranged on both sides of the explosion body. The first light enters the second beam splitter through the explosion body and is split into the third light and the fourth light by the second beam splitter. The third light enters the active detection optical system, and the fourth light enters the passive detection optical system.

[0016] In one embodiment of the present invention, the active detection optical system includes a third beam splitter, a fourth beam splitter, a first optical detector, a first filter, a second optical detector, a second filter, a third optical detector, and a third filter;

[0017] The laser entering the active detection optical system is split into a fifth light and a sixth light by the third beam splitter. The fifth light enters the first optical detector through the first filter. The sixth light is split into a seventh light and an eighth light by the fourth beam splitter. The seventh light enters the second optical detector through the second filter, and the eighth light enters the third optical detector through the third filter.

[0018] In one embodiment of the present invention, the reference optical system includes a fifth beam splitter, a sixth beam splitter, a fourth optical detector, a fourth filter, a fifth optical detector, a fifth filter, a sixth optical detector and a sixth filter. The second light is split into a ninth light and a tenth light by the fifth beam splitter, the ninth light enters the fourth optical detector through the fourth filter, the tenth light is split into an eleventh light and a twelfth light by the sixth beam splitter, the eleventh light enters the fifth optical detector through the fifth filter, and the twelfth light enters the sixth optical detector through the sixth filter.

[0019] In one embodiment of the present invention, the passive detection optical system includes a short-waveband detection module and a long-waveband detection module. The short-waveband detection module includes a short-waveband optical filter, a first lens, a first image intensifier and a seventh optical detector arranged in sequence, and the long-waveband detection module includes a long-waveband optical filter, a second lens, a second image intensifier and an eighth optical detector arranged in sequence.

[0020] In one embodiment of the present invention, it also includes an optical beam expansion module, a first optical focusing module and a second optical focusing module;

[0021] The optical beam expansion module is arranged between the laser beam combining module and the first beam splitter. The laser emitted by the laser beam combining module enters the optical beam expansion module and enters the first beam splitter after being expanded by the optical beam expansion module.

[0022] The first optical focusing module is arranged between the explosion body and the active detection optical system. The first path of light enters the first optical focusing module through the explosion body and enters the active detection optical system after being focused by the first optical focusing module.

[0023] The second optical focusing module is arranged between the first beam splitter and the reference optical system, and the second path of light is focused by the second optical focusing module and enters the reference optical system.

[0024] In a second aspect, the present invention provides a method for synchronously measuring temperature and particle size for metal wire electric explosion, which is applied to a device for synchronously measuring temperature and particle size for metal wire electric explosion as provided in the above scheme, wherein the device for synchronously measuring temperature and particle size comprises a multi-wavelength laser system, a laser beam combining module, a first beam splitter, an active detection optical system, a reference optical system, a passive detection optical system, a host computer, a synchronous control circuit and an explosion signal collector, and the method comprises:

[0025] When an electrical explosion occurs, the explosion signal collector collects the detonation time of the explosive body and sends the detonation time to the synchronous control circuit;

[0026] The delay time is set by the host computer, and a trigger signal is sent to the multi-wavelength laser system, the active detection optical system, the reference optical system, and the passive detection optical system through the synchronous control circuit to control the multi-wavelength laser system, the active detection optical system, the reference optical system, and the passive detection optical system to work synchronously based on the delay time;

[0027] The image data collected by the active detection optical system, the reference optical system and the passive detection optical system are transmitted to the host computer, and the host computer calculates the temperature and particle size distribution at any time during the explosion process based on the image data.

[0028] In one embodiment of the present invention, the active detection optical system, the passive detection optical system and the reference optical system all include a filter for filtering light and an optical detector for measuring light, and the laser enters the optical detector through the filter;

[0029] The image data collected by the active detection optical system, the reference optical system and the passive detection optical system are transmitted to the host computer, including:

[0030] Transmitting image data collected by the optical detector of the active detection optical system, the second optical detector of the reference optical system, and the optical detector of the passive detection optical system to a host computer;

[0031] The host computer calculates the temperature and particle size distribution at any time during the explosion based on the image data, including:

[0032] Calculating a radiation intensity signal output by the optical detector based on a first formula;

[0033] The first formula is:

[0034] S = ∫ Δ λE T (λ,T)D(λ)F(λ)K(λ)dλ

[0035] Where S is the radiation intensity signal output by the optical detector, E T(λ,T) is the spectral radiation energy of the effective area of ​​the optical detector, λ is the wavelength of the laser, T is the target temperature of the explosive body, D(λ) is the response function of the optical detector, Δλ represents the integral band, F(λ) is the spectral transmittance of one of the active detection optical system, the reference optical system and the passive detection optical system, and K(λ) is the spectral transmittance of the filter;

[0036] Calculate the spectral radiation energy of the effective area of ​​the optical detector based on the second formula;

[0037] The second formula is:

[0038]

[0039] Among them, ε(λ) is the emissivity, M(λ,T) is the blackbody spectral radiation emittance, a is the optical system's clear radius, and f' is the focal length of the optical system;

[0040] Substituting the second formula into the first formula can obtain a third formula, and the radiation intensity signal output by the optical detector is calculated based on the third formula;

[0041] The third formula is:

[0042]

[0043] Based on the third formula, the radiation integral band [λ m1 ,λ m2 The radiation intensity signal S1 output by the optical detector in ] is:

[0044]

[0045] Based on the third formula, the radiation integral band [λ n1 ,λ n2 The radiation intensity signal S2 output by the optical detector in ] is:

[0046]

[0047] When the radiation integration band is determined, ε(λ)=ε0, where ε0 is a constant;

[0048] Calculate the ratio R(T) of the radiation intensity signal S1 output by the optical detector to the radiation intensity signal S2 output by the optical detector based on the fourth formula;

[0049] The fourth formula is:

[0050]

[0051] Based on the fourth formula, the target temperature T of the explosion body is calculated according to the radiation intensity signal S1 and the radiation intensity signal S2 actually measured by the optical detector.

[0052] In one embodiment of the present invention, the host computer calculates the temperature and particle size distribution at any time during the explosion process based on the image data, and also includes:

[0053] Calculate the absorbance of the laser after passing through the explosion body based on the fifth formula;

[0054] The fifth formula is:

[0055] ln(I / I0)=-[α(T)+β(D)]l

[0056] Among them, ln(I / I0) represents absorbance, I is the intensity of the laser after passing through the electric explosion field, I0 is the initial intensity of the laser, α is the absorption coefficient, β is the scattering coefficient, T represents temperature, D represents particle size, and l represents medium length;

[0057] According to the temperature accuracy T0, establish α at different temperatures in T1, T1+T0,…, T1+nT0 i / α1 ratio database;

[0058] According to the particle size accuracy D0, establish the β i / β1 ratio database;

[0059] Set up the equation to solve:

[0060]

[0061] Based on solving the equation, the particle size and temperature of the dust in the electric explosion process of the explosive body are obtained.

[0062] Compared with the prior art, the present invention has the following beneficial effects:

[0063] In the above scheme of the present application, firstly, a multi-wavelength laser system can emit multiple light beams of different wavelengths, and the active detection optical system can measure the multiple laser beams emitted by the explosive body to obtain multiple optical images of the electric explosion field. The passive detection optical system can capture the radiation light intensity distribution of the explosive body at the moment of electric explosion, and the reference optical system can measure the laser that has not passed through the explosive body, so that a reference system for comparison with the active detection optical system can be established. The upper computer processes and calculates the data measured by the active detection optical system, the passive detection optical system and the reference optical system, so that the temperature and particle size distribution of the explosive body at a specific moment can be monitored in real time, and the temperature change and particle size change of the explosive body can be obtained, so that the temperature and particle size of the electric explosion of the metal wire can be monitored synchronously in real time, and the accuracy and efficiency of the measurement of the temperature and particle size of the explosive body can be improved, which is convenient for accurate analysis of the electric explosion process of the metal wire. Secondly, the detonation time of the explosive body is collected by the explosion signal collector, and the multi-wavelength laser system, active detection optical system, reference optical system and passive detection optical system are controlled by the host computer and the synchronous control circuit to work synchronously based on the detonation time, which can further improve the measurement accuracy of each optical system and further improve the accuracy of the measurement of the temperature and particle size of the explosive body.

[0064] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Figure 1 A schematic diagram of a device for synchronously measuring temperature and particle size of a metal wire electric explosion provided by an embodiment of the present invention Figure 1 ;

[0066] Figure 2 is a schematic diagram of a multi-wavelength laser system and a laser beam combining module in an embodiment of the present invention;

[0067] Figure 3 is a schematic diagram of an active detection optical system in an embodiment of the present invention;

[0068] Figure 4 is a schematic diagram of a reference optical system in an embodiment of the present invention;

[0069] Figure 5 is a schematic diagram of a passive detection optical system in an embodiment of the present invention;

[0070] Figure 6 A schematic diagram of a device for synchronously measuring temperature and particle size of a metal wire electric explosion provided by an embodiment of the present invention Figure 2 .

[0071] Figure numerals: 1-multi-wavelength laser system, 2-laser beam combining module, 21-first reflector, 22-second reflector, 23-first beam combining mirror, 3-first beam splitter, 4-active detection optical system, 41-third beam splitter, 42-fourth beam splitter, 43-first optical detector, 44-first filter, 45-second optical detector, 46-second filter, 47-third optical detector, 48-third filter, 5-reference optical system, 51-fifth beam splitter, 52-sixth beam splitter, 53-fourth optical detector, 54-fourth filter, 55-fifth optical optical detector, 56-fifth optical filter, 57-sixth optical detector, 58-sixth optical filter, 6-passive detection optical system, 61-short-waveband optical filter, 62-first lens, 63-first image intensifier, 64-seventh optical detector, 65-long-waveband optical filter, 66-second lens, 67-second image intensifier, 68-eighth optical detector, 7-host computer, 8-synchronous control circuit, 9-explosion signal collector, 10-explosion body, 11-optical beam expansion module, 12-first optical focusing module, 13-second optical focusing module, 14-second beam splitter. DETAILED DESCRIPTION

[0072] The present invention is further described in detail below with reference to specific embodiments, but the embodiments of the present invention are not limited thereto.

[0073] Embodiment 1:

[0074] See also Figures 1 to 6 The embodiment of the present invention provides a synchronous measurement device for temperature and particle size of metal wire electric explosion, comprising a multi-wavelength laser system 1, a laser beam combining module 2, a first beam splitter 3, an active detection optical system 4, a reference optical system 5, a passive detection optical system 6, a host computer 7, a synchronous control circuit 8 and an explosion signal collector 9, wherein the first beam splitter 3 and the active detection optical system 4 are used to be arranged on both sides of an explosion body 10, the host computer 7 is connected to the synchronous control circuit 8, and the multi-wavelength laser system 1, the active detection optical system 4, the reference optical system 5 and the passive detection optical system 6 are all connected to the synchronous control circuit 8; the multi-wavelength laser system 1 is used to Multiple laser beams with different wavelengths are emitted, and the multiple laser beams are combined into one laser beam by the laser beam combining module 2. The combined laser beam is split into a first light path and a second light path by the first beam splitter 3. The first light path enters the active detection optical system 4 through the explosive body 10, and the second light path enters the reference optical system 5. The passive detection optical system 6 is used to capture the radiation light intensity distribution of the explosive body 10 at the moment of electrical explosion; the explosion signal collector 9 is used to collect the detonation time of the explosive body 10, and the upper computer 7 is used to control the synchronous operation of the multi-wavelength laser system 1, the active detection optical system 4, the reference optical system 5 and the passive detection optical system 6 through the synchronous control circuit 8 according to the detonation time.

[0075] In some embodiments of the present application, the multi-wavelength laser system 1 is a three-wavelength laser system for generating lasers of three wavelengths, which may be composed of a three-wavelength laser; or may be composed of a dual-wavelength laser and a single-wavelength laser, for example. Figure 6 The multi-wavelength laser system 1 shown can also be composed of three single-wavelength lasers, for example Figure 1 The multi-wavelength laser system 1 shown. The three-wavelength laser system can emit three laser beams with wavelengths of λ1, λ2 and λ3, respectively. In this embodiment, λ1 = 1047nm, λ2 = 532nm, and λ3 = 1064nm. When two or three lasers are used, an optical beam combining module is required to combine multiple laser beams into one. The system ensures the stability of laser output and the wide range of wavelength coverage.

[0076] In some embodiments of the present application, the active detection optical system 4 , the reference optical system 5 , and the passive detection optical system 6 all include optical detectors for receiving laser light to generate images and filters for filtering out laser light of different wavelengths.

[0077] In some embodiments of the present application, the first beam splitter 3 can split the combined laser into an active light path laser and a reference light path laser. The active light path laser continues to propagate along the original light path through the explosion area and then enters the active detection optics, while the reference light path laser directly enters the reference optical system 5.

[0078] In some embodiments of the present application, the host computer 7 can be a computer, which is responsible for the overall control of the system and sends information such as delay time to the synchronization control circuit 8. At the same time, it receives image data acquired by the active detection optical system 4 and the passive detection optical system 6 and performs data processing and result output.

[0079] In some embodiments of the present application, the synchronization control circuit 8 may be a Field Programmable Gate Array (FPGA).

[0080] In some embodiments of the present application, the synchronization control circuit 8 sets the delay time t according to the host computer 7. After the delay of t nanoseconds, the synchronization control circuit 8 simultaneously sends a trigger signal to the multi-wavelength laser system 1, the reference optical system 5, the active detection optical system 4, and the passive detection optical system 6. The trigger signal is used to synchronously start the multi-wavelength laser, the three optical detectors of the reference optical system 5, the three optical detectors of the active detection optical system 4, and the optical detector of the passive detection optical system 6. Through precise delay control and signal synchronization, it is ensured that the systems work together to achieve high temporal and spatial resolution monitoring of the explosion process.

[0081] In some embodiments of the present application, the explosion signal collector 9 collects physical changes caused by electrical explosions, including but not limited to the following signals: a sudden increase in light radiation intensity, a transient and drastic change in the electric field or magnetic field, and a significant enhancement of the acoustic wave signal. After capturing the above changes, the explosion signal collector 9 generates an explosion start signal and sends it to the synchronous control circuit 8 module to provide a precise time reference for the triggering of subsequent measurement devices.

[0082] In some embodiments of the present application, the explosion signal collector 9 may be a photodiode.

[0083] In the above scheme of the present application, firstly, a plurality of light beams with different wavelengths can be emitted by the multi-wavelength laser system 1, and the multiple laser beams emitted by the explosive body 10 can be measured by the active detection optical system 4 to obtain a plurality of optical images of the electric explosion field, and the radiation light intensity distribution of the explosive body 10 at the moment of electric explosion can be captured by the passive detection optical system 6, and the laser that has not passed through the explosive body 10 can be measured by the reference optical system 5, so that a reference system for comparison with the active detection optical system 4 can be established, and the data measured by the active detection optical system 4, the passive detection optical system 6 and the reference optical system 5 can be processed and calculated by the upper computer 7, so that the temperature and particle size distribution of the explosive body 10 at a specific moment can be monitored in real time, and the temperature change and particle size change of the explosive body 10 can be obtained, so that the temperature and particle size of the electric explosion of the metal wire can be monitored synchronously in real time, and at the same time, the accuracy and efficiency of the temperature and particle size measurement of the explosive body 10 can be improved, so as to accurately analyze the electric explosion process of the metal wire. Secondly, the detonation time of the explosive body 10 is collected by the explosion signal collector 9, and the multi-wavelength laser system 1, the active detection optical system 4, the reference optical system 5 and the passive detection optical system 6 are controlled by the host computer 7 and the synchronization control circuit 8 to work synchronously based on the detonation time, which can further improve the measurement accuracy of each optical system, and further improve the accuracy of the temperature and particle size measurement of the explosive body 10.

[0084] In an alternative example, Figure 1 and Figure 2As shown, the multi-wavelength laser system 1 includes three single-wavelength lasers, which respectively emit the first laser, the second laser and the third laser, and the wavelengths of the first laser, the second laser and the third laser are different; the laser beam combining module 2 includes a first reflector 21, a second reflector 22 and a first beam combining mirror 23, the first laser is reflected to the first beam combining mirror 23 by the first reflector 21, the third laser is reflected to the first beam combining mirror 23 by the second reflector 22, the second laser is directly emitted to the first beam combining mirror 23, and the first laser, the second laser and the third laser are combined into one laser beam by the first beam combining mirror 23; the passive detection optical system 6 is set toward the explosive body 10. With this structure, three laser beams of different wavelengths can be emitted by three single-wavelength lasers, thereby ensuring the stability of laser output and the wide coverage of wavelengths. Through the cooperation of the first reflector 21, the second reflector 22 and the first beam combining mirror 23, the three laser beams can be combined into one laser beam, realizing the spatial fusion of the beams, which is convenient for the subsequent propagation and processing of the beams.

[0085] In some embodiments of the present application, the first beam splitter 3 has a known and fixed transmittance and reflectance ratio. The design of the first beam splitter 3 allows part of the laser to be transmitted along the original path, and the other part of the laser to be reflected at an angle of 90°, thereby separating the laser beam.

[0086] In another alternative example, Figure 6 As shown, the test device also includes a second beam splitter 14, the multi-wavelength laser system 1 includes a dual-wavelength laser and a single-wavelength laser, the dual-wavelength laser is used to emit the first laser and the second laser, and the single-wavelength laser is used to emit the third laser, and the wavelengths of the first laser, the second laser and the third laser are different; the laser beam combining module 2 includes a fourth reflector and a second beam combining mirror, the first laser and the second laser are directly emitted to the second beam combining mirror, the third laser is reflected to the second beam combining mirror by the fourth reflector, and the first laser, the second laser and the third laser are combined into a laser beam by the second beam combining mirror; the first beam splitter 3 and the second beam splitter 14 are arranged on both sides of the explosive body 10, the first light enters the second beam splitter 14 through the explosive body 10, and is split into the third light and the fourth light by the second beam splitter 14, the third light enters the active detection optical system 4, and the fourth light enters the passive detection optical system 6. With this structure, three laser beams of different wavelengths can also be emitted through a dual-wavelength laser and a single-wavelength laser, thereby ensuring the stability of laser output and the wide range of wavelength coverage. Through the cooperation of the first reflector 21, the second reflector 22 and the first beam combining mirror 23, the three laser beams can be combined into one laser beam, realizing the spatial fusion of the light beams, which is convenient for the subsequent propagation and processing of the light beams. In addition, when the fourth light beam passes through the explosive body 10 and enters the passive detection optical system 6, the measurement accuracy of the passive detection optical system 6 can be improved.

[0087] In some embodiments of the present application, the second beam splitter 14 has a known and fixed transmittance and reflectance ratio, and the design of the first beam splitter 3 allows part of the laser to be transmitted along the original path, and the other part of the laser to be reflected at an angle of 90°, thereby separating the laser beam.

[0088] In some embodiments of the present application, a reflector is further provided between the second beam splitter 14 and the passive detection optical system 6, and the fourth light is reflected to the passive detection optical system 6 by the reflector, so that the layout of the passive detection optical system 6 is more flexible and convenient.

[0089] In some embodiments of the present application, a reflector is further provided between the first beam splitter 3 and the multi-wavelength laser system 1, and the laser emitted by the multi-wavelength laser system 1 is reflected to the first beam splitter 3 by the reflector, so that the layout of the multi-wavelength laser system 1 is more flexible and convenient.

[0090] In some embodiments of the present application, Figure 3 As shown, the active detection optical system 4 includes a third beam splitter 41, a fourth beam splitter 42, a first optical detector 43, a first filter 44, a second optical detector 45, a second filter 46, a third optical detector 47 and a third filter 48; the laser entering the active detection optical system 4 is split into a fifth light and a sixth light by the third beam splitter 41, the fifth light enters the first optical detector 43 through the first filter 44, the sixth light is divided into a seventh light and an eighth light by the fourth beam splitter 42, the seventh light enters the second optical detector 45 through the second filter 46, and the eighth light enters the third optical detector 47 through the third filter 48. With this structure, the three laser beams of different wavelengths in the first light path can be separated through the cooperation of the third beam splitter 41, the fourth beam splitter 42, the first filter 44, the second filter 46 and the third filter 48, so that the first optical detector 43, the second optical detector 45 and the third optical detector 47 can respectively collect the optical information of the first laser, the second laser and the third laser. Among them, the first filter 44, the second filter 46 and the third filter 48 can selectively transmit the laser light by wavelength, and prevent the excessive laser light from damaging the image plane of the optical detector, so as to ensure that the detector only receives the signal of the target wavelength, thereby improving the accuracy and reliability of the system measurement.

[0091] In some embodiments of the present application, Figure 6 As shown, convex lenses and optical attenuation sheets can be arranged on the front sides of the first filter 44, the second filter 46 and the third filter 48, and the laser enters the filter after passing through the convex lens and the optical attenuation sheet in sequence. In this way, the convex lens is used to focus the light, and the optical attenuation sheet is used to uniformly attenuate the intensity of the light passing through its surface, so that the light beam can be finely controlled.

[0092] In some embodiments of the present application, Figure 4 As shown, the reference optical system 5 includes a fifth beam splitter 51, a sixth beam splitter 52, a fourth optical detector 53, a fourth filter 54, a fifth optical detector 55, a fifth filter 56, a sixth optical detector 57 and a sixth filter 58. The second light is split into a ninth light and a tenth light by the fifth beam splitter 51, the ninth light enters the fourth optical detector 53 through the fourth filter 54, the tenth light is split into an eleventh light and a twelfth light by the sixth beam splitter 52, the eleventh light enters the fifth optical detector 55 through the fifth filter 56, and the twelfth light enters the sixth optical detector 57 through the sixth filter 58. With this structure, the cooperation of the fifth beam splitter 51, the sixth beam splitter 52, the fourth filter 54, the fifth filter 56 and the sixth filter 58 can separate the three laser beams of different wavelengths in the second light path, so that the fifth optical detector 55, the sixth optical detector 57 and the seventh optical detector 64 can respectively collect the optical information of the first laser, the second laser and the third laser, and then the fifth optical detector 55, the sixth optical detector 57 and the seventh optical detector 64 can respectively form reference image information corresponding to the first optical detector 43, the second optical detector 45 and the third optical detector 47, further improving the measurement accuracy. Among them, the fourth filter 54, the fifth filter 56 and the sixth filter 58 can selectively transmit the laser light by wavelength, and prevent the excessively strong laser light from damaging the image plane of the optical detector, so as to ensure that the detector only receives the signal of the target wavelength, thereby improving the accuracy and reliability of the system measurement.

[0093] In some embodiments of the present application, Figure 4 As shown, convex lenses and optical attenuation sheets can be arranged on the front sides of the fourth filter 54, the fifth filter 56 and the sixth filter 58, and the laser enters the filter after passing through the convex lenses and the optical attenuation sheets in sequence. In this way, the convex lenses are used to focus the light, and the optical attenuation sheets are used to uniformly attenuate the intensity of the light passing through the surface, so that the light beam can be finely controlled.

[0094] In some embodiments of the present application, Figure 5As shown, the passive detection optical system 6 includes a short-wave detection module and a long-wave detection module. The short-wave detection module includes a short-wave optical filter 61, a first lens 62, a first image intensifier 63 and a seventh optical detector 64 arranged in sequence, and the long-wave detection module includes a long-wave optical filter 65, a second lens 66, a second image intensifier 67 and an eighth optical detector 68 arranged in sequence. With this structure, the radiation intensity of long wavelength and short wavelength can be detected respectively through the short-wave detection module and the long-wave detection module, so as to ensure that the radiation signals of different wavelength bands can be separated and accurately captured in a very short time, thereby providing reliable data support for the study of the physical characteristics of the electric explosion field.

[0095] In some embodiments of the present application, the image intensifier is an electronic optical device that is mainly used to enhance weak light signals and convert them into visible light signals, thereby producing brighter and clearer images and improving imaging quality.

[0096] In some embodiments of the present application, after receiving the trigger signal, the passive detection optical system 6 immediately opens the optical shutters of the seventh optical detector 64 and the eighth optical detector 68, and turns on the switches of the first image intensifier 63 and the second image intensifier 67. The first image intensifier 63 and the second image intensifier 67 can enhance the electric explosion field image information of 1 nanosecond, and the seventh optical detector 64 and the eighth optical detector 68 immediately capture the enhanced electric explosion field image information. The first lens 62 and the second lens 66 can magnify the explosion field area. Among them, the short-wave optical filter 61 can filter out the light with a wavelength above λ4 (here 650nm) of the explosion field, pass the laser below λ4, and filter out the three-wavelength laser (λ1, λ2 and λ3), and the long-wave optical filter 65 can filter out the laser below λ4 of the explosion field, pass the laser above λ4 wavelength, and filter out the three-wavelength laser (λ1, λ2 and λ3). By adopting two independent optical modules to detect the radiation intensity of the long-wave band and the short-wave band respectively, and using an image intensifier, the passive detection optical system 6 can effectively capture the radiation intensity distribution at the moment of the electric explosion (time interval of 1 nanosecond).

[0097] In some embodiments of the present application, the three optical detectors in the active detection optical system 4, the three optical detectors in the reference optical system 5, and the optical detector in the passive detection optical system 6 send the captured image information to the host computer 7. The host computer 7 processes and analyzes the 8 groups of image data, and obtains the temperature distribution and particle size distribution at any time during the electric explosion according to the calculation principle.

[0098] In some embodiments of the present application, the measuring device also includes an optical beam expansion module 11, a first optical focusing module 12 and a second optical focusing module 13; the optical beam expansion module 11 is arranged between the laser beam combining module 2 and the first beam splitter 3, and the laser emitted by the laser beam combining module 2 enters the optical beam expansion module 11, and enters the first beam splitter 3 after being expanded by the optical beam expansion module 11; the first optical focusing module 12 is arranged between the explosion body 10 and the active detection optical system 4, and the first light enters the first optical focusing module 12 through the explosion body 10, and enters the active detection optical system 4 after being focused by the first optical focusing module 12; the second optical focusing module 13 is arranged between the first beam splitter 3 and the reference optical system 5, and the second light is focused by the second optical focusing module 13 to enter the reference optical system 5. With this structure, the optical beam expansion module 11 can expand the laser spot into a large-sized parallel light, and the expanded beam size covers the electric explosion area as fully as possible; the first optical focusing module 12 can converge the laser transmitted through the first beam splitter 3, focus the beam to the optical detector image plane, and form a light spot that matches the optical detector receiving area. The second optical focusing module 13 can converge the laser reflected by the first beam splitter 3, focus the beam to the optical detector image plane, and form a light spot that matches the optical detector receiving area.

[0099] In some embodiments of the present application, the optical beam expansion module 11 may be composed of two lenses with different focal lengths and sizes.

[0100] In some embodiments of the present application, the first optical focusing module 12 and the second optical focusing module 13 may be composed of two lenses with different focal lengths and sizes.

[0101] Embodiment 2:

[0102] The embodiment of the present invention provides a method for synchronously measuring temperature and particle size for electric explosion of metal wires, which is applied to the synchronous measuring device for synchronously measuring temperature and particle size for electric explosion of metal wires provided in the first embodiment above. The synchronous measuring device for synchronously measuring temperature and particle size includes a multi-wavelength laser system, a laser beam combining module, a first beam splitter, an active detection optical system, a reference optical system, a passive detection optical system, a host computer, a synchronous control circuit and an explosion signal collector. The method includes:

[0103] When an electrical explosion occurs, the explosion signal collector collects the detonation time of the explosive body and sends the detonation time to the synchronous control circuit;

[0104] The delay time is set by the host computer, and a trigger signal is sent to the multi-wavelength laser system, the active detection optical system, the reference optical system, and the passive detection optical system through the synchronous control circuit to control the multi-wavelength laser system, the active detection optical system, the reference optical system, and the passive detection optical system to work synchronously based on the delay time;

[0105] The image data collected by the active detection optical system, the reference optical system and the passive detection optical system are transmitted to the host computer, and the host computer calculates the temperature and particle size distribution at any time during the explosion process based on the image data.

[0106] The beneficial effects of the second embodiment of the present invention and its various implementations can be analyzed by referring to the beneficial effects of the first embodiment and its various implementations, which will not be described in detail here.

[0107] The embodiment of the present application can use a combination of dual-band colorimetry and multi-wavelength laser extinction technology to measure the temperature and dust particle size of the electric explosion field. Specifically, the dual-band colorimetry method is used to quickly obtain the transient temperature distribution of the electric explosion field, providing basic temperature data for subsequent measurements; on this basis, the multi-wavelength laser extinction method is used to accurately analyze the distribution characteristics of the dust particle size. This method effectively reduces the computational complexity, improves the data processing speed, and ensures the measurement accuracy and efficiency, and provides a new, efficient and reliable technical path for in-depth research on the dynamic evolution of temperature and particle size during the electric explosion process.

[0108] In some embodiments of the present application, the dual-band colorimetric temperature measurement method is based on the colorimetric temperature measurement theory, and the temperature value of the target to be measured is obtained by comparing the radiation intensity of the target to be measured within two different bands. Specifically, the active detection optical system, the passive detection optical system and the reference optical system all include a filter for filtering light and an optical detector for measuring light, and the laser enters the optical detector through the filter;

[0109] The image data collected by the active detection optical system, the reference optical system and the passive detection optical system are transmitted to the host computer, including:

[0110] Transmitting image data collected by the optical detector of the active detection optical system, the second optical detector of the reference optical system, and the optical detector of the passive detection optical system to a host computer;

[0111] The host computer calculates the temperature and particle size distribution at any time during the explosion based on the image data, including:

[0112] Calculating a radiation intensity signal output by the optical detector based on a first formula;

[0113] The first formula is:

[0114] S=∫ΔλET(λ,T)D(λ)F(λ)K(λ)dλ

[0115] Where S is the radiation intensity signal output by the optical detector, E T (λ,T) is the spectral radiation energy of the effective area of ​​the optical detector, λ is the wavelength of the laser, T is the target temperature of the explosive body, D(λ) is the response function of the optical detector, Δλ represents the integral band, F(λ) is the spectral transmittance of one of the active detection optical system, the reference optical system and the passive detection optical system, and K(λ) is the spectral transmittance of the filter;

[0116] Calculate the spectral radiation energy of the effective area of ​​the optical detector based on the second formula;

[0117] The second formula is:

[0118]

[0119] Among them, ε(λ) is the emissivity, M(λ,T) is the blackbody spectral radiation emittance, a is the optical system's clear radius, and f' is the focal length of the optical system;

[0120] Substituting the second formula into the first formula can obtain a third formula, and the radiation intensity signal output by the optical detector is calculated based on the third formula;

[0121] The third formula is:

[0122]

[0123] Based on the third formula, the radiation integral band [λ m1 ,λ m2 The radiation intensity signal S1 output by the optical detector in ] is:

[0124]

[0125] Based on the third formula, the radiation integral band [λ n1 ,λ n2 The radiation intensity signal S2 output by the optical detector in ] is:

[0126]

[0127] When the radiation integration band is determined, ε(λ)=ε0, where ε0 is a constant;

[0128] Calculate the ratio R(T) of the radiation intensity signal S1 output by the optical detector to the radiation intensity signal S2 output by the optical detector based on the fourth formula;

[0129] The fourth formula is:

[0130]

[0131] Based on the fourth formula, the target temperature T of the explosive body is calculated according to the radiation intensity signal S1 and the radiation intensity signal S2 actually measured by the optical detector. In this way, the temperature of the explosive body at the current moment can be calculated according to the detection data of the optical detector.

[0132] In some embodiments of the present application, according to the Lambert-Beer law, since the dust particles in the electric explosion absorb and scatter light, the laser will attenuate after passing through the particles. In this way, the distribution characteristics of the dust particle size are accurately analyzed by the multi-wavelength laser extinction method. Specifically, the host computer calculates the temperature and particle size distribution at any time during the explosion process based on the image data, and also includes:

[0133] Calculate the absorbance of the laser after passing through the explosion body based on the fifth formula;

[0134] The fifth formula is:

[0135] ln(I / I0)=-[α(T)+β(D)]l

[0136] Among them, ln(I / I0) represents absorbance, I is the intensity of the laser after passing through the electric explosion field, I0 is the initial intensity of the laser, α is the absorption coefficient, β is the scattering coefficient, T represents temperature, D represents particle size, and l represents medium length;

[0137] Among them, the absorbance ln(I / I0) is obtained according to the experimental results, so it is necessary to solve the two unknown quantities α(T) and β(D), which requires at least three equations;

[0138] According to theoretical calculations, the absorption coefficient α at different T and different laser wavelength i can be determined. i and the scattering coefficient β i .

[0139] According to the temperature accuracy T0, establish the ratio α of the absorption coefficient at different temperatures T in T1, T1+T0,…, T1+nT0 i / α1's database is recorded as

[0140] According to the particle size accuracy D0, the scattering coefficient ratio β of different particle sizes in D1, D1+D0,…, D1+nT0 is established i / β1's database is recorded as

[0141] Set up the equation to solve:

[0142]

[0143] Based on the solution of the equation, the particle size and temperature of the dust in the explosion body during the electric explosion are obtained. and Two unknown quantities can be obtained by solving the equation. The relationship between T and The dust particle size and temperature can be obtained by the relationship between D and D. Using this method, combined with the image data before and after the multi-wavelength laser passes through the electric explosion field, the particle size and temperature of the dust during the electric explosion process can be obtained.

[0144] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0145] Although the present application is described herein in conjunction with various embodiments, in the process of implementing the claimed application, those skilled in the art may understand and implement other variations of the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "one" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in a claim. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0146] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, devices (equipment), or computer program products. Therefore, the present application may adopt the form of complete hardware embodiments, complete software embodiments, or embodiments in combination with software and hardware, which are collectively referred to as "modules" or "systems" herein. Moreover, the present application may adopt the form of computer program products implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program codes. The computer program is stored / distributed in a suitable medium, provided together with other hardware or as a part of hardware, or may adopt other distribution forms, such as by Internet or other wired or wireless telecommunication systems.

[0147] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A device for synchronously measuring temperature and particle size of metal wire electric explosion, characterized in that: It includes a multi-wavelength laser system, a laser beam combining module, a first beam splitter, an active detection optical system, a reference optical system, a passive detection optical system, a host computer, a synchronous control circuit and an explosion signal collector; The first beam splitter and the active detection optical system are used to be arranged on both sides of the explosive body, the host computer is connected to the synchronous control circuit, and the multi-wavelength laser system, the active detection optical system, the reference optical system and the passive detection optical system are all connected to the synchronous control circuit; The multi-wavelength laser system is used to emit multiple laser beams with different wavelengths, the multiple laser beams are combined into one laser beam by the laser beam combining module, the combined laser beam is split into a first light path and a second light path by the first beam splitter, the first light path enters the active detection optical system through the explosive body, the second light path enters the reference optical system, and the passive detection optical system is used to capture the radiation light intensity distribution of the explosive body at the moment of electrical explosion; The explosion signal collector is used to collect the detonation time of the explosive body, and the host computer is used to control the synchronous operation of the multi-wavelength laser system, the active detection optical system, the reference optical system and the passive detection optical system through the synchronization control circuit according to the detonation time.

2. The device for synchronously measuring temperature and particle size of metal wire electric explosion according to claim 1, characterized in that: The multi-wavelength laser system comprises three single-wavelength lasers, which respectively emit a first laser, a second laser and a third laser, and the wavelengths of the first laser, the second laser and the third laser are different; The laser beam combining module comprises a first reflector, a second reflector and a first beam combining mirror, the first laser is reflected to the first beam combining mirror by the first reflector, the third laser is reflected to the first beam combining mirror by the second reflector, the second laser is directly irradiated to the first beam combining mirror, and the first laser, the second laser and the third laser are combined into one laser beam by the first beam combining mirror; The passive detection optical system is arranged toward the explosive body.

3. The device for synchronously measuring temperature and particle size of metal wire electric explosion according to claim 1, characterized in that: It also includes a second beam splitter, the multi-wavelength laser system includes a dual-wavelength laser and a single-wavelength laser, the dual-wavelength laser is used to emit a first laser and a second laser, the single-wavelength laser is used to emit a third laser, and the wavelengths of the first laser, the second laser and the third laser are different; The laser beam combining module includes a fourth reflector and a second beam combining mirror, the first laser and the second laser are directly irradiated to the second beam combining mirror, the third laser is reflected to the second beam combining mirror by the fourth reflector, and the first laser, the second laser and the third laser are combined into one laser beam by the second beam combining mirror; The first beam splitter and the second beam splitter are arranged on both sides of the explosive body. The first light enters the second beam splitter through the explosive body and is split into a third light and a fourth light by the second beam splitter. The third light enters the active detection optical system, and the fourth light enters the passive detection optical system.

4. The device for synchronously measuring temperature and particle size of metal wire electric explosion according to claim 2 or 3, characterized in that: The active detection optical system includes a third beam splitter, a fourth beam splitter, a first optical detector, a first filter, a second optical detector, a second filter, a third optical detector and a third filter; The laser entering the active detection optical system is split into a fifth light path and a sixth light path by the third beam splitter. The fifth light path enters the first optical detector through the first filter. The sixth light path is split into a seventh light path and an eighth light path by the fourth beam splitter. The seventh light path enters the second optical detector through the second filter, and the eighth light path enters the third optical detector through the third filter.

5. The device for synchronously measuring temperature and particle size of metal wire electric explosion according to claim 1, characterized in that: The reference optical system includes a fifth beam splitter, a sixth beam splitter, a fourth optical detector, a fourth filter, a fifth optical detector, a fifth filter, a sixth optical detector and a sixth filter. The second light is divided into a ninth light and a tenth light by the fifth beam splitter. The ninth light enters the fourth optical detector through the fourth filter. The tenth light is split into an eleventh light and a twelfth light by the sixth beam splitter. The eleventh light enters the fifth optical detector through the fifth filter. The twelfth light enters the sixth optical detector through the sixth filter.

6. The device for synchronously measuring temperature and particle size of metal wire electric explosion according to claim 1, characterized in that: The passive detection optical system includes a short-waveband detection module and a long-waveband detection module. The short-waveband detection module includes a short-waveband optical filter, a first lens, a first image intensifier and a seventh optical detector arranged in sequence. The long-waveband detection module includes a long-waveband optical filter, a second lens, a second image intensifier and an eighth optical detector arranged in sequence.

7. The device for synchronously measuring temperature and particle size of metal wire electric explosion according to claim 1, characterized in that: It also includes an optical beam expansion module, a first optical focusing module and a second optical focusing module; The optical beam expansion module is arranged between the laser beam combining module and the first beam splitter. The laser emitted by the laser beam combining module enters the optical beam expansion module and enters the first beam splitter after being expanded by the optical beam expansion module. The first optical focusing module is arranged between the explosion body and the active detection optical system, the first path of light enters the first optical focusing module through the explosion body, and enters the active detection optical system after being focused by the first optical focusing module; The second optical focusing module is disposed between the first beam splitter and the reference optical system, and the second light is focused by the second optical focusing module and enters the reference optical system.

8. A method for synchronously measuring temperature and particle size of metal wire electric explosion, characterized in that: The method is applied to the temperature and particle size synchronous measurement device for metal wire electric explosion as claimed in any one of claims 1 to 7, wherein the temperature and particle size synchronous measurement device comprises a multi-wavelength laser system, a laser beam combining module, a first beam splitter, an active detection optical system, a reference optical system, a passive detection optical system, a host computer, a synchronous control circuit and an explosion signal collector, and the method comprises: When an electrical explosion occurs, the explosion signal collector collects the detonation time of the explosive body and sends the detonation time to the synchronous control circuit; The delay time is set by the host computer, and a trigger signal is sent to the multi-wavelength laser system, the active detection optical system, the reference optical system, and the passive detection optical system through the synchronization control circuit to control the multi-wavelength laser system, the active detection optical system, the reference optical system, and the passive detection optical system to work synchronously based on the delay time; The image data collected by the active detection optical system, the reference optical system and the passive detection optical system are transmitted to the host computer, and the host computer calculates the temperature and particle size distribution at any time during the explosion process based on the image data.

9. The method for synchronously measuring temperature and particle size of metal wire electric explosion according to claim 8, characterized in that: The active detection optical system, the passive detection optical system and the reference optical system all include a filter for filtering light and an optical detector for measuring light, and the laser enters the optical detector through the filter; Transmitting the image data collected by the active detection optical system, the reference optical system and the passive detection optical system to the host computer, including: Transmitting image data collected by the optical detector of the active detection optical system, the second optical detector of the reference optical system, and the optical detector of the passive detection optical system to the host computer; The host computer calculates the temperature and particle size distribution at any time during the explosion process according to the image data, including: Calculating the radiation intensity signal output by the optical detector based on a first formula; The first formula is: S=∫ Δ λE T (λ,T)D(λ)F(λ)K(λ)dλ Wherein, S is the radiation intensity signal output by the optical detector, E T (λ,T) is the spectral radiation energy of the effective area of ​​the optical detector, λ is the wavelength of the laser, T is the target temperature of the explosive body, D(λ) is the response function of the optical detector, Δλ represents the integral band, F(λ) is the spectral transmittance of one of the active detection optical system, the reference optical system and the passive detection optical system, and K(λ) is the spectral transmittance of the filter; Calculate the spectral radiation energy of the effective area of ​​the optical detector based on a second formula; The second formula is: Among them, ε(λ) is the emissivity, M(λ,T) is the blackbody spectral radiation emittance, a is the optical system's clear radius, and f' is the focal length of the optical system; Substituting the second formula into the first formula can obtain a third formula, and the radiation intensity signal output by the optical detector is calculated based on the third formula; The third formula is: Based on the third formula, the radiation integral band [λ m1 ,λ m2 The radiation intensity signal S1 output by the optical detector in ] is: Based on the third formula, the radiation integral band [λ n1 ,λ n2 The radiation intensity signal S2 output by the optical detector in ] is: When the radiation integration band is determined, ε(λ)=ε0, where ε0 is a constant; Calculating a ratio R(T) of the radiation intensity signal S1 output by the optical detector to the radiation intensity signal S2 output by the optical detector based on a fourth formula; The fourth formula is: Based on the fourth formula, the target temperature T of the explosive body is calculated according to the radiation intensity signal S1 and the radiation intensity signal S2 actually measured by the optical detector.

10. The method for synchronously measuring temperature and particle size of metal wire electric explosion according to claim 9, characterized in that: The host computer calculates the temperature and particle size distribution at any time during the explosion process according to the image data, and also includes: Calculate the absorbance of the laser after passing through the explosion body based on the fifth formula; The fifth formula is: ln(I / I0)=-[α(T)+β(D)]l Among them, ln(I / I0) represents absorbance, I is the intensity of the laser after passing through the electric explosion field, I0 is the initial intensity of the laser, α is the absorption coefficient, β is the scattering coefficient, T represents temperature, D represents particle size, and l represents medium length; According to the temperature accuracy T0, establish the ratio α of the absorption coefficient at different temperatures T in T1, T1+T0,…, T1+nT0 i / α1's database is recorded as According to the particle size accuracy D0, the scattering coefficient ratio β of different particle sizes in D1, D1+D0,…, D1+nT0 is established i / β1's database is recorded as Set up the equation to solve: Based on the solved equation, the particle size and temperature of the dust of the explosion body during the electric explosion process are obtained.

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