Explosion field transient thermal radiation damage intensity evaluation system and method

Abstract

The invention provides a system and method for testing the transient thermal radiation damage intensity of an explosion field, and belongs to the technical field of explosion transient thermal radiation damage measurement, and the method comprises the steps: obtaining the response time of a plurality of effectors under a plurality of radiation heat flux densities, and obtaining a mathematical model of the response time of each effector and the radiation heat flux density; an optimal effector is obtained; obtaining the response time of the optimal effector when the explosion occurs in the explosion field, and obtaining the radiation heat flux density of the optimal effector when the explosion occurs in the explosion field according to the mathematical model of the response time of the optimal effector and the radiation heat flux density; and the transient thermal radiation damage intensity when the explosion occurs in the explosion field is further obtained. The invention aims to solve the problem that the transient thermal radiation damage strength, detected by a traditional thermal radiation sensor, of an explosion field is greatly different from the actual damage strength due to the fact that the distance between the traditional thermal radiation sensor and the explosion center is long when explosion occurs in the explosion field.

Description

Technical Field

[0001] This invention belongs to the field of measurement technology of transient thermal radiation damage in explosions, and specifically relates to an assessment system and method for the intensity of transient thermal radiation damage in an explosion field. Background Technology

[0002] In explosion field experiments, the projectile at the explosion center releases a large amount of energy in a very short time, resulting in high thermal radiation damage intensity at the explosion center within a short period. Because traditional thermal radiation sensors are expensive, and because the explosion generates shock waves or fragments, the likelihood of damage to traditional thermal radiation sensors is inversely proportional to their distance from the explosion center. This results in a certain distance between the traditional thermal radiation sensors and the explosion center, causing a significant discrepancy between the measured thermal radiation values ​​collected by traditional thermal radiation sensors placed within the explosion field and the actual values.

[0003] Therefore, this invention proposes a system and method for evaluating the transient thermal radiation damage intensity of an explosion field. Summary of the Invention

[0004] To address the significant discrepancy between the numerical values ​​of thermal radiation collected by traditional thermal radiation sensors deployed within an explosion field and the actual values, this invention provides a method and system for assessing the transient thermal radiation damage intensity of an explosion field.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An effector, fixed within the blast field, is used to receive thermal radiation generated at the blast center; the distance between the effector and the blast center is... And the front of the effector is directly facing the center of the explosion; among them rice; Thermocouples are embedded on the back of the effector and are used to measure the temperature of the effector at the moment of the explosion. High-speed cameras are used to capture frontal images of the explosive reaction material and record the response phenomena produced by the explosive reaction material. The data processing module is used to receive the frontal image of the effector captured by the high-speed camera and the temperature of the effector at the moment of the explosion, and to determine the response time of the effector.

[0006] Furthermore, it also includes a signal amplifier, the input of which is electrically connected to the thermocouple for amplifying the received temperature signal measured by the thermocouple, and outputting the amplified temperature information to the high-frequency data acquisition unit; the distance between the signal amplifier and the explosion center of the explosion field is... ,and 50 meters.

[0007] Furthermore, it also includes a high-frequency data acquisition unit for receiving information from the signal amplifier output and outputting the received information to the data processing module, and the distance between the high-frequency data acquisition unit and the signal amplifier is [missing information]. ;in, The distance between the preset signal amplifier and the explosion center. The distance between the preset high-frequency data acquisition device and the explosion center, and .

[0008] The specific steps of a method for assessing the transient thermal radiation damage intensity in an explosion field, used in an assessment system for realizing such assessments, are as follows: Through multiple laser transient high-radiation calibration experiments, the response times of several effectors under several radiation heat flux densities were obtained. Using a fitting algorithm, a mathematical model of the response time and radiative heat flux density of each effector is obtained based on the response time of each effector under several radiative heat flux densities. The optimal effector is obtained by combining the response time of each effector under several radiative heat flux densities with the predicted response time of the effector under each radiative heat flux density obtained by the mathematical model of the response time and radiative heat flux density of each effector. An assessment system for the transient thermal radiation damage intensity of an explosion field is used to obtain the response time of the optimal effector when the explosion occurs. The response time of the optimal effector is then input into a mathematical model of the response time and radiative heat flux density of the optimal effector to obtain the radiative heat flux density of the optimal effector when the explosion occurs. Thus, the transient thermal radiation damage intensity when the explosion occurs is obtained.

[0009] Furthermore, the specific steps for using a fitting algorithm to obtain the mathematical model of the response time and radiative heat flux density of each effector based on its response time under several radiative heat flux densities are as follows: Construct a two-dimensional coordinate system with the horizontal axis representing the radiative heat flux density and the vertical axis representing the response time of the effector; The first The effector in the first The response time under the second radiative heat flux density is used as the first response time in the two-dimensional coordinate system. The ordinate of the nth sample point; The value of the second radiative heat flux density is used as the first in the two-dimensional coordinate system. The x-coordinate of the nth sample point is obtained in the two-dimensional coordinate system. One sample point; The first Mapping the response time of an effector under all radiative heat flux densities to a two-dimensional coordinate system yields the response time in the two-dimensional coordinate system. 1 sample point; among which, The type of preset radiative heat flux density; Using a fitting algorithm, all data points in the two-dimensional coordinate system are fitted, and the resulting fitting relationship is denoted as the i-th... A mathematical model of the response time of an effector in relation to radiative heat flux density.

[0010] Furthermore, the specific steps for obtaining the optimal effector are as follows: For the i For each effector, calculate its effect at each calibrated radiative heat flux density. q F (F=1…… n 1) Predicted response time t iFpredicted Compared with actual response time t iFactual relative error ; Each calibrated radiative heat flux density Assign weights ,in The preset weight index is greater than 0; Calculate the weighted goodness-of-fit score for each effector. ; choose The effector with the highest value is selected as the optimal effector.

[0011] The transient thermal radiation damage intensity assessment system provided by this invention places the effector around the explosion center, ensuring that the difference between the thermal radiation received by the effector and the actual thermal radiation released by the explosive is much smaller than the difference between the thermal radiation value collected by traditional thermal radiation sensors and the actual thermal radiation value released by the explosive. This improves the accuracy of obtaining the thermal radiation released by the explosive through the effector's reaction. When acquiring the temperature signal measured by the thermocouple using a high-frequency data acquisition device, a signal amplifier is used to amplify the temperature signal measured by the thermocouple, reducing the impact of noise on the acquired temperature signal and making the acquired temperature signal more reflective of minute temperature changes on the effector. This invention improves the accuracy of the response time of the acquired effector. When conducting explosion experiments based on the explosion field, the explosion center exhibits characteristics of high thermal radiation damage intensity and low response time. Selecting the optimal effector ensures that its response time under the influence of the explosive better reflects the thermal radiation released by the explosive, thus improving the accuracy of the quantitative assessment of the transient thermal radiation damage intensity of the explosion field. Since the price of thermocouples and effectors is far lower than that of temperature sensors suitable for explosion fields, this invention solves the problem of excessively high costs caused by the easy damage of temperature sensors when acquiring the transient thermal radiation damage intensity during an explosion. Attached Figure Description

[0012] To more clearly illustrate the embodiments and design schemes of the present invention, the accompanying drawings required for this embodiment will be briefly described below. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of an assessment system for transient thermal radiation damage intensity in an explosion field according to Embodiment 1 of the present invention; Figure 2 A structural diagram of the tooling used for loading effect materials within the explosion field; Figure 3 This represents the typical response process of effector A under high-radiation damage caused by laser irradiation; Figure 4 This represents the typical response process of effector B under high-radiation damage caused by laser irradiation; Figure 5 Images of the packing of effectors within the blast field before the explosion; Figure 6 Image of the effector at a distance of 0.3 meters from the explosion center after the explosion; Figure 7 An image of the effector at a distance of 0.5 meters from the explosion center after the explosion; Figure 8 This is a method for evaluating the transient thermal radiation damage intensity of an explosion field, as described in Embodiment 3 of the present invention. Figure 9 Image of the radiative heat flux density and response time of effector A obtained from a laser transient high-radiative calibration experiment; Figure 10 Image of the radiative heat flux density and response time of effector B obtained from a laser transient high-radiation calibration experiment. Detailed Implementation

[0014] To enable those skilled in the art to better understand and implement the technical solutions of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0015] Example 1 This invention provides a system for assessing the transient thermal radiation damage intensity of an explosion field, specifically as follows: Figures 1 to 7 As shown, it includes an effector, thermocouple, signal amplifier, high-frequency data acquisition unit, high-speed camera, and data processing module. Figure 1 This is a schematic diagram of a system for assessing the transient thermal radiation damage intensity of an explosion field. Among them, Figure 1In the diagram, 1 represents the explosive, 2 represents the effector, 3 represents the thermocouple, 4 represents the high-speed camera, 5 represents the signal amplifier, 6 represents the high-frequency data acquisition unit, and 7 represents the data processing module.

[0016] The effector is positioned within the blast field at a distance from the blast center. Furthermore, the front of the effector faces the center of the explosion. In this embodiment, the effector is an object used to receive the explosive force, such as a piece of iron. Figure 2 Tooling for loading the effectant, Figure 2 The number 8 in the figure represents information about the loading of the effector. Figure 2 9 in the diagram represents the device for fixing the effect. Figure 5 Images of the effects material before the explosion. Figure 6 and Figure 7 To receive images of the impact material after the explosion; thermocouples are embedded on the back of the impact material to measure the center temperature of the impact material in real time; the signal amplifier is located at a distance of [missing information - likely a distance in Chinese characters]. It is electrically connected to a thermocouple and used to collect the temperature information of the effector output by the thermocouple. The collected temperature information is amplified and then output. The distance between the high-frequency data acquisition unit and the explosion center is... It is used to collect the temperature information of the effector output by the signal amplifier and output the collected temperature information of the effector to the data processing module; the distance between the high-speed camera and the explosion center is The system captures real-time images of the front of the effector and outputs these images to the data processing module. The thermocouples used in this embodiment must have a response time of less than 2ms.

[0017] Since the price of thermocouples and effectors is much lower than that of temperature sensors, this invention can solve the problem of excessively high costs caused by the damage of temperature sensors when an explosion occurs.

[0018] in, , And the distance between the high-frequency data acquisition unit and the amplifier is In this embodiment, the distance between the effector and the explosion center within the explosion field is preset. Other implementation methods It can be set to a value less than 1m, which is the distance between the signal amplifier and the explosion center. 5m, other implementation methods It can be set to a value greater than 50 meters, representing the distance between the high-frequency data acquisition device and the explosion center. Distance between the high-speed camera and the explosion center m can be set to other values ​​in other real-time modes, and this embodiment does not impose any restrictions.

[0019] The sampling intervals for both the high-speed camera and the thermocouple are... The sampling interval is ms, and both the high-speed camera and the thermocouple begin collecting data at the detonation time. In this embodiment, the preset sampling interval is... In other implementations, it can be set to other values.

[0020] The data processing module analyzes the image of the front of the effect object captured by the high-speed camera and the temperature information of the effect object collected by the high-frequency data acquisition device to obtain the response time of the effect object.

[0021] The method of obtaining the response time of the effector based on the temperature information data sequence and the surface image data sequence of the effector is a well-known technique and will not be elaborated upon in this embodiment.

[0022] Thus, the response time of the effector when the explosion occurs in the explosion field is obtained.

[0023] Example 2 This invention provides a system for assessing the transient thermal radiation damage intensity of an explosion field, and solves the problem of quantitative assessment of the transient thermal radiation damage intensity of an explosion field. The system includes an effector, an R-type fine thermocouple, a high-speed camera, a signal amplifier, a high-frequency data acquisition unit, and a data processing module.

[0024] When measuring the transient thermal radiation damage intensity of an explosion field, the effector exhibits a response phenomenon under the action of high thermal radiation for an extremely short time.

[0025] Furthermore, the R-type fine thermocouple has a response time of no more than 2 ms. The R-type fine thermocouple is set to be embedded on the back of the effector to measure the center temperature of the effector in real time, indirectly reflecting the state of the effector, and is used to measure the response time of the effector.

[0026] Furthermore, the high-speed camera is set up to be far from the explosion center and able to clearly capture the front of the effector, used to measure the response time of the effector and to record the response phenomena produced by the effector at the moment of the explosion.

[0027] Furthermore, the signal amplifier is set away from the explosion center to amplify the temperature signal measured by the R-type fine thermocouple.

[0028] Furthermore, the high-frequency data acquisition unit was set away from the explosion center to acquire temperature signals measured by R-type fine thermocouples.

[0029] Furthermore, the data processing module is set away from the explosion center to store and visualize the temperature signals measured by the R-type fine thermocouple.

[0030] Furthermore, the zero point of the response time is consistent with the detonation time, and the end point of the response time is consistent with the point at which the R-type fine thermocouple no longer produces obvious temperature signal fluctuations after the detonation ends.

[0031] Furthermore, the zero point of the response time is consistent with the detonation time, and the end point of the response time is consistent with the point at which the effector no longer produces obvious response phenomena as observed by the high-speed camera after the detonation.

[0032] Furthermore, the response phenomenon is that when the effector is subjected to transient thermal radiation generated by the explosion, the surface of the effector directly facing the explosion center exhibits combustion, ignition, production of small or large amounts of smoke, and yellow or charred brown spots on its surface. Figure 3 and Figure 4 An image of the effector after the response occurs.

[0033] Example 3 This invention provides a method for assessing the transient thermal radiation damage intensity of an explosion field using an assessment system for realizing such assessments. The flowchart of the method is shown below. Figure 8 As shown, it includes: Step S001: Through multiple laser transient high radiation calibration tests, the response times of several effectors under several radiation heat flux densities are obtained.

[0034] Specifically, choose The effector participated in the laser transient high-emissivity calibration experiment and obtained Such effector in The response time under different radiative heat flux densities. Among them, the types of effectors preset in this embodiment... 2. Types of radiative heat flux density 2. In other embodiments, other values ​​can be set, and the number of types of radiative heat flux density is greater than 10. Among them... Figure 3 and Figure 4 The images are of effector A and effector B under laser irradiation, respectively.

[0035] Step S002: Using a fitting algorithm, based on the response time of each effector under several radiative heat flux densities, obtain a mathematical model of the response time and radiative heat flux density of each effector; based on the response time of each effector under several radiative heat flux densities and the predicted response time of the effector under each radiative heat flux density obtained from the mathematical model of the response time and radiative heat flux density of each effector, obtain the optimal effector.

[0036] It should be noted that the multiple radiative heat flux densities in step S001 may not include the radiative heat flux density released by the explosive during the explosion test. Therefore, a mathematical model of the response time and radiative heat flux density of each effector is obtained based on the response time of each effector under multiple radiative heat flux densities.

[0037] It should be further noted that, during an explosion, the explosion field exhibits two characteristics: high thermal radiation damage intensity and low response criterion. That is, the mathematical models of radiative heat flux density and response time for different effectors have varying degrees of fit with the characteristics of the explosion field. Therefore, calculating the fit between the mathematical models of radiative heat flux density and response time for different effectors and the characteristics of the explosion field is crucial to obtaining the optimal effector.

[0038] Specifically, a two-dimensional coordinate system is constructed with the radiative heat flux density on the horizontal axis and the response time of the effector on the vertical axis; the first... The effector in the first The response time under the second radiative heat flux density is used as the first response time in the two-dimensional coordinate system. The ordinate of the nth sample point; The value of the second radiative heat flux density is used as the first in the two-dimensional coordinate system. The x-coordinate of the nth sample point is obtained in the two-dimensional coordinate system. There are 100 sample points. The distribution of the sample points for effector A within the two-dimensional coordinate system is as follows: Figure 9 As shown, the distribution of sample points of effector B in the two-dimensional coordinate system is as follows: Figure 10 As shown.

[0039] Furthermore, the first Mapping the response time of an effector under all radiative heat flux densities to a two-dimensional coordinate system yields the response time in the two-dimensional coordinate system. 1 sample point; among which, For different preset types of radiative heat flux density, a fitting algorithm is used to fit all data points in a two-dimensional coordinate system. The resulting fitting relationship is denoted as the first... A mathematical model relating the response time of an effector to radiative heat flux density. Among them, Figure 9 The straight line in the figure represents the mathematical model of the response time of effector A versus radiative heat flux density. Figure 9 and Figure 10 The black squares in the diagram represent sample points within a two-dimensional coordinate system. Figure 9 and Figure 10 The straight lines in the diagram represent the mathematical models of the response time and radiative heat flux density of effector A and effector B, respectively. In this embodiment, the first... The first effector is denoted as effector A, and the second effector... The effector is denoted as effector B. The fitting of the sample points in the two-dimensional coordinate system to obtain the fitting formula is a well-known technique and will not be elaborated upon in this embodiment.

[0040] Furthermore, the steps to obtain the optimal effector are as follows: 1. Regarding the first i For each effector, calculate its effect at each calibrated radiative heat flux density. q F (F=1…… n 1) Predicted response time t iFpredicted Compared with actual response time t iFactual relative error .

[0041] 2. For each calibrated radiative heat flux density Assign weights ,in The preset weight index is greater than 0.

[0042] 3. Calculate the weighted goodness-of-fit score for each effector. .

[0043] 4. Select The effector with the highest value is selected as the optimal effector.

[0044] Thus, the optimal effector and the mathematical model of its response time and radiative heat flux density are obtained.

[0045] Step S003: Using an assessment system for the transient thermal radiation damage intensity of an explosion field, obtain the response time of the optimal effector when the explosion occurs. Input the response time of the optimal effector into the mathematical model of the response time and radiative heat flux density of the optimal effector to obtain the radiative heat flux density of the optimal effector when the explosion occurs. Based on the radiative heat flux density of the optimal effector when the explosion occurs, obtain the transient thermal radiation damage intensity of the explosion field.

[0046] Specifically, the optimal effector is used as the effector in the assessment system for the transient thermal radiation damage intensity of the explosion field. When the explosion occurs, the response time of an effector in the assessment system for the transient thermal radiation damage intensity of the explosion field is recorded as the response time of the optimal effector.

[0047] Furthermore, the response time of the optimal effector is input into the mathematical model of the response time of the optimal effector and the radiative heat flux density, and the output is recorded as the radiative heat flux density at the explosion center when the explosion occurs. Based on the radiative heat flux density at the explosion center, the transient thermal radiation damage intensity of the explosion field is obtained. The method of obtaining the transient thermal radiation damage intensity based on the radiative heat flux density is a well-known existing technique and will not be elaborated upon in this embodiment.

[0048] Thus, the transient thermal radiation damage intensity of the explosion field is obtained.

[0049] Example 4 This invention provides a method for assessing the transient thermal radiation damage intensity of an explosion field based on an assessment system for such damage, comprising the following steps: Step 1: According to heat transfer theory, assuming that various heat losses of the effector are ignored, when the temperature of the effector reaches the response temperature, the effector will exhibit a response phenomenon. This is based on the law governing the response time of solid materials under applied radiation.

[0050] TRP is the thermal response parameter, which is a property combining the thermal conductivity, density, and specific heat of the effector material. For a given effector under a specific radiation scenario, there is a numerical relationship between its response time tig (the time it takes to respond to radiative heat flux) and the radiative heat flux density, i.e., (tig)-0.5∝q”ext.

[0051] Step 2: By conducting calibration experiments on different effectors under low-radiation combustion flame and high-radiation transient laser conditions, the values ​​of response time and radiative heat flux density of different effectors are obtained.

[0052] Step 3: Based on the relationship between tig and q”ext and the different response times and radiative heat flux density values ​​obtained in Step 2, different response time variation patterns of the effector can be obtained, and mathematical models of different response times of the effector and thermal radiation damage intensity can be established.

[0053] Step 4: Based on the characteristics of the explosion field, analyze the mathematical models of response time and radiation intensity damage intensity of different effectors. Based on the criteria of high thermal radiation damage intensity and low response time, select a mathematical model of effector and its response time and thermal radiation damage intensity that can meet the explosion field conditions and criteria.

[0054] Step 5: Based on the characteristics and conditions of the explosion field, design a tooling suitable for loading the effect material. This tooling is as follows: Figure 2 As shown, it includes a circular effector 1 and a shell fixing fixture 2, which can fix the effector in the explosion field and make the front of the effector face the explosion center with a large area.

[0055] Step 6: Set the effector in the explosion field conditions, measure the response time of the effector during the explosion, and substitute the obtained response time of the effector into the mathematical model described in Step 4 to calculate the thermal radiation damage intensity of the effector under the explosion field conditions. This allows for the quantification of the thermal radiation damage intensity generated at the explosion center in the explosion field.

[0056] The specific operation method for each step is as follows: Step 1: Assuming all heat losses of the effector are ignored, when the temperature of the effector reaches the response temperature, the effector will exhibit a response phenomenon. This is based on the law governing the response time of solid materials under applied radiation.

[0057] (1) TRP is the thermal response parameter, which is a property combining the thermal conductivity, density, and specific heat of the effector material. For a given effector under a specific radiation scenario, its response time... t ig (Time of combustion due to radiant heat flux) and radiant heat flux density q ” ext There is a numerical relationship between them, that is ( t ig ) -0.5 ∝q ” ext .

[0058] Step Two: By testing two different effectors, A and B, in... Figure 3 , Figure 4 The laser transient high-radiation calibration experiment shown yielded values ​​for the response time and radiative heat flux density of two different effectors, A and B.

[0059] Step 3: According to t ig With q ” ext By combining the numerical values ​​of response time and radiative heat flux density of the two different effectors A and B obtained in step two, the variation law of response time of the two different effectors can be obtained, and a mathematical model of response time and thermal radiation damage intensity of the two different effectors can be established.

[0060] Effector A: (2) Effector B: (3) Step 4: Based on the characteristics of the explosion field, perform the following mathematical modeling on the response time of the two different effectors and the damage intensity of the radiation intensity: Figure 9 , Figure 10Linear regression analysis was performed, and based on the criteria of high thermal radiation damage intensity and low response time, effector C was finally selected, which not only had the best linear regression performance but also met the explosion field conditions and criteria.

[0061] Step 5: Based on the characteristics and conditions of the explosion field, design a tooling suitable for effector C, which can fix the effector in the explosion field and make the front of the effector face the explosion center with a large area.

[0062] Step Six: Use Figure 1 The present invention describes a transient thermal radiation damage testing system for an explosion field based on an effector to verify the thermal radiation damage intensity of the explosion field quantified by the effector C. The testing system includes an explosion center location 1, a fixture 2 with an effector, an R-type fine thermocouple 3, a high-speed camera 4, a signal amplifier 5, a high-frequency data acquisition unit 6, and a data processing module 7.

[0063] In this test system, the names, functions, and layout parameters of each part are as follows: A fixture with effector B is used to fix effector B in place. Effector B responds by receiving high-temperature radiation damage from the explosion center. During the measurement process, the front of the fixture with effector B is positioned at a distance of 0.2 meters from the explosion center. At 0.5cm.

[0064] The R-type precision thermocouple is used to measure the response time of effector B in an explosion field. During the measurement process, it is buried on the back of effector B to measure the center temperature of effector B in real time. The zero point of the response time is consistent with the detonation time, and the end point of the response time is consistent with the time when the R-type precision thermocouple no longer produces obvious temperature signal fluctuations after the detonation ends.

[0065] A high-speed camera is used to measure the response time of effector B. During the measurement process, the high-speed camera is set at a distance of 100m from the explosion center and can clearly capture the front of effector B. It is used to measure the response time of effector B and record the response phenomenon produced by effector B at the moment of explosion. The zero point of the response time is consistent with the detonation time, and the end point of the response time is consistent with the time when effector B no longer produces obvious response phenomena observed through the high-speed camera after the detonation.

[0066] A signal amplifier used to amplify the temperature signal measured by a type R fine thermocouple.

[0067] A high-frequency data acquisition unit is used to acquire temperature signals measured by R-type fine thermocouples.

[0068] The data processing module is used to store and visualize the temperature signals collected by the R-type fine thermocouples.

[0069] In this embodiment, the effector B is a self-developed type, characterized in that when the effector B is stimulated by a certain amount of external thermal radiation, it can produce a response phenomenon of combustion, ignition, small or large amount of smoke, and yellow or charred brown spots on the surface in a short period of time.

[0070] The R-type fine thermocouple uses Pt / Pt-13% Rh material, has a response time of 2ms, and can measure temperatures up to 1600℃.

[0071] The high-speed camera is the Fastcam Mini UX100 model, a high frame rate camera with a maximum shooting frame rate of up to 10,000 frames per second.

[0072] The signal amplifier is independently developed and has an amplification factor of 100.

[0073] The high-frequency data acquisition unit is a TraNET FE 208 model, with 8 channels per group. The instrument has a maximum resolution of 16 bits and a sampling frequency of up to 10 MHz.

[0074] Step 7; Determine the effects of substance B before and after the explosion, such as Figure 5 , Figure 6 , Figure 7 The response phenomenon shown is used to measure the response time of the effector B before and after the explosion and substitute it into the mathematical model of the effector B described in step three, so as to calculate the thermal radiation damage intensity of the effector B under the explosion field conditions, and then quantify the thermal radiation damage intensity generated by the explosion center in the explosion field.

[0075] It should be noted that the specific embodiments described above enable those skilled in the art to more fully understand the present invention, but do not limit the present invention in any way. Therefore, although the present invention has been described in detail in this specification and embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention; and all technical solutions and improvements that do not depart from the spirit and scope of the present invention are covered within the protection scope of the patent of the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A system for assessing the transient thermal radiation damage intensity of an explosion field, characterized in that, include: Effector material, which is fixed within the explosion field to receive thermal radiation generated at the explosion center; The distance between the effector and the explosion center of the explosion field is And the front of the effector is directly facing the center of the explosion; among them rice; Thermocouples are embedded on the back of the effector and are used to measure the temperature of the effector at the moment of the explosion. High-speed cameras are used to capture frontal images of the explosive reaction material and record the response phenomena produced by the explosive reaction material. The data processing module is used to receive the frontal image of the effector captured by the high-speed camera and the temperature of the effector at the moment of the explosion, and to determine the response time of the effector.

2. The system for assessing the transient thermal radiation damage intensity of an explosion field according to claim 1, characterized in that, It also includes a signal amplifier, the input of which is electrically connected to the thermocouple. This signal amplifier amplifies the received temperature signal measured by the thermocouple and outputs the amplified temperature information to the high-frequency data acquisition unit. The distance between the signal amplifier and the explosion center of the explosion field is... ,and 50 meters.

3. The system for assessing the transient thermal radiation damage intensity of an explosion field according to claim 1, characterized in that, It also includes a high-frequency data acquisition unit, used to receive information from the signal amplifier output and output the received information to the data processing module, and the distance between the high-frequency data acquisition unit and the signal amplifier is [missing information]. ;in, The distance between the preset signal amplifier and the explosion center. The distance between the preset high-frequency data acquisition device and the explosion center, and .

4. An evaluation method for implementing the evaluation system for assessing the transient thermal radiation damage intensity of an explosion field as described in claim 1, characterized in that, The specific steps are as follows: Through multiple laser transient high-radiation calibration experiments, the response times of several effectors under several radiation heat flux densities were obtained. Using a fitting algorithm, a mathematical model of the response time and radiative heat flux density of each effector is obtained based on the response time of each effector under several radiative heat flux densities. The optimal effector is obtained by combining the response time of each effector under several radiative heat flux densities with the predicted response time of the effector under each radiative heat flux density obtained by the mathematical model of the response time and radiative heat flux density of each effector. The response time of the optimal effector when the explosion occurs is obtained through the assessment system of transient thermal radiation damage intensity of the explosion field. The response time of the optimal effector when the explosion occurs is input into the mathematical model of the response time of the optimal effector and the radiative heat flux density. The output is recorded as the radiative heat flux density of the optimal effector when the explosion occurs. The transient thermal radiation damage intensity when the explosion occurs is obtained through the radiative heat flux density of the optimal effector when the explosion occurs.

5. The method for assessing the transient thermal radiation damage intensity of an explosion field according to claim 4, characterized in that, The specific steps of using the fitting algorithm to obtain the mathematical model of the response time and radiative heat flux density of each effector based on the response time of each effector under several radiative heat flux densities are as follows: Construct a two-dimensional coordinate system with the horizontal axis representing the radiative heat flux density and the vertical axis representing the response time of the effector; The first The effector in the first The response time under the second radiative heat flux density is used as the first response time in the two-dimensional coordinate system. The ordinate of the nth sample point; The value of the second radiative heat flux density is used as the first in the two-dimensional coordinate system. The x-coordinate of the nth sample point is obtained in the two-dimensional coordinate system. One sample point; The first Mapping the response time of an effector under all radiative heat flux densities to a two-dimensional coordinate system yields the response time in the two-dimensional coordinate system. 1 sample point; among which, The type of preset radiative heat flux density; Using a fitting algorithm, all data points in the two-dimensional coordinate system are fitted, and the resulting fitting relationship is denoted as the i-th... A mathematical model of the response time of an effector in relation to radiative heat flux density.

6. The method for assessing the transient thermal radiation damage intensity of an explosion field according to claim 4, characterized in that, The specific steps for obtaining the optimal effector are as follows: For the i For each effector, calculate its effect at each calibrated radiative heat flux density. q F (F=1…… n 1) Predicted response time t iF predicted Compared with actual response time t iF actual relative error ; Each calibrated radiative heat flux density Assign weights ,in The preset weight index is greater than 0; Calculate the weighted goodness-of-fit score for each effector. ; choose The effector with the highest value is selected as the optimal effector.

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