CN117553854A - Multi-parameter combined testing device and method in explosion field - Google Patents
Multi-parameter combined testing device and method in explosion field Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/12—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in colour, translucency or reflectance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0052—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes measuring forces due to impact
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/14—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force of explosions; for measuring the energy of projectiles
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Abstract
The invention relates to a multi-parameter combined testing device and method in an explosion field, which belong to the technical field of explosion field testing devices and comprise the following steps: the device comprises a pressure test unit, a thermal effect test unit and a shock wave overpressure test unit, wherein the thermal effect test unit is wrapped and bonded at the end part of the pressure test unit, which is close to the explosive; the shock wave overpressure test unit is positioned on one side of the thermal effect test unit, and the test end of the shock wave overpressure test unit is equal to the test end of the thermal effect test unit and the explosive distance and is positioned on the same horizontal plane. The invention can effectively avoid the cross influence among test systems by carrying out parallel measurement on the overpressure and thermal effects of the shock wave and the pressure data born by the target, and has the advantages of high precision, stable signal receiving, easy processing of data, simple operation, easy observation of phenomena, reusability and the like.
Description
Technical Field
The invention relates to the technical field of explosion field testing devices, in particular to a multi-parameter combined testing device and method in an explosion field.
Background
The high-temperature and high-pressure gas generated when the explosive explodes in the air is released rapidly, so that the surrounding air is compressed and pushed to form a high-pressure area, and the high-pressure area can be outwards spread in the form of shock waves; in addition to the overpressure of the shock wave, the high-temperature gas generated by the explosion of the explosive can also be rapidly released to generate a high-temperature field, which can cause burn and damage to surrounding objects and personnel; when the overpressure of the shock wave acts on the living target, the pressure generated by the shock wave on the surface of the target is transmitted to the internal organs through tissues and bones of the body, and when the overpressure of the shock wave is large enough, the internal organs can be damaged and ruptured.
Currently, methods for simultaneously acquiring overpressure, temperature and target bearing pressure data of shock waves in an explosion transient state mainly comprise a multifunctional sensor test method (active measurement method) and a coupling test method (passive measurement method).
The multifunctional sensor test method is to arrange one embedded multiparameter sensor in the human body model in the position of certain distance and direction from explosive, and the shock wave acting instantaneous sensor receives the signal and outputs the overpressure, temperature and internal pressure data. The main disadvantages are: (1) System complexity: the multi-parameter sensor generally requires complex design and manufacturing processes, and has high requirements on the manufacturing process of the sensitive element and the semiconductor material, which increases the periodic maintenance cost and the maintenance difficulty of the sensor; (2) mutual interference: the problem of mutual interference exists among different sub-sensors in the multi-parameter sensor, so that the measurement accuracy is affected, for example, a temperature sensor can be affected by the pressure of the pressure sensor, and deviation and the like of a temperature measurement result are caused; (3) instability: the reliability of the multi-parameter sensor needs to be ensured, otherwise, the measurement result may be invalid, and a breakdown condition occurs during data processing. (4) signal attenuation: because of the impact impedance of human body model medium, embedding a multi-parameter sensor in the model can make the acquired impact wave overpressure and temperature data attenuate in the model, which results in inaccurate measurement results.
The coupling test method is to put a plurality of test components into a test system in the same device, so as to realize the characterization of explosive shock wave and temperature physical phenomenon after explosion. The main principle is that the physical change quantity of the auxiliary element after explosion is used for reversely calculating the shock wave to do the function and temperature data. Such as: the coupling test method of shock wave and thermal effect in explosion field is to quantitatively convert the deformation capacity of thin-wall metal tube into the acting capacity of shock wave and convert the compression capacity of one-way shape memory alloy spring into thermal dose parameter; however, the coaxiality of the thin-wall metal tube is difficult to ensure under the effect of the shock wave with a larger overpressure value, the obtained deformation data errors are difficult to consider, the equivalent converted parameters are the shock wave pressure to apply work, and the shock wave overpressure data cannot be related to the shock pressure data received by the human body model; meanwhile, the deformation of the one-way shape memory alloy spring is influenced by the shock effect of the air shock wave, the influence degree of shock waves at different positions on the compression amount of the spring is difficult to judge, and the coupling measurement device cannot acquire the overpressure at a certain position and the internal compression data of an impacted target.
In summary, the two measurement methods have the defect of easy interference in measurement, and aiming at the two measurement methods, the invention provides a multi-parameter combined test device and method in an explosion field, which can effectively avoid the cross influence among test systems by carrying out parallel measurement on the overpressure of shock waves, the thermal effect and pressure data born by targets and has the advantages of high precision, stable signal receiving, easy data processing, simple operation, easy observation of phenomena, reusability and the like.
Disclosure of Invention
The invention provides a multi-parameter combined testing device and method in an explosion field, which solve the technical problems that the existing explosion field detection device is complex in system, multiple sensors interfere with each other, multiple sensor signals are unstable, and accurate data cannot be obtained due to attenuation of propagation signals.
The technical scheme for solving the technical problems is as follows, the multi-parameter combined testing device in an explosion field comprises: a pressure test unit, a thermal effect test unit and a shock wave overpressure test unit,
the pressure testing unit comprises a vertical plate, a connecting cylinder, a connecting piece, a human body simulation part and a pressure sensor, wherein one end of the connecting cylinder is vertically fixed on the plate surface of the vertical plate; one end of the human body simulation part is fixed at the other end of the connecting cylinder far away from the vertical plate; the connecting piece is embedded in the human body simulation part, and one end of the connecting piece penetrates out of the human body simulation part and stretches into the connecting cylinder; the pressure sensor is positioned in the connecting cylinder and is fixed on the connecting piece; the thermal effect test unit comprises a patch made of temperature-sensitive color-changing materials (according to Chinese national standard "classification and determination of thermal damage" (GB/T7408-2005), the lowest temperature when the primary thermal damage is achieved is 45 ℃, so that the excitation temperature of the temperature-sensitive color-changing materials adopted in the device is 45 ℃, namely, when the surface temperature T of a model is less than 45 ℃, the materials are black, when T is more than or equal to 45 ℃, the materials are transparent, the temperature-sensitive materials are single-pass color-changing materials, and the temperature-sensitive materials cannot be restored to the original state after the thermal radiation effect is completed), and the patch is wrapped and bonded at the other end of the human body simulation part far away from the connecting cylinder; the shock wave overpressure testing unit comprises a vertical frame, an arc-shaped plate, a probe and an overpressure sensor, wherein the vertical frame is positioned on one side of the vertical plate in parallel; the arc-shaped plate is fixed at the top end of the vertical frame in the direction; the probes are coaxially arranged on the concave cambered surface of the arc-shaped plate and fixed on the vertical frame, and grooves are formed in the side parts of the probes; the overpressure sensor is fixed in the groove and is positioned on the same horizontal plane with the tangent point of the end part of the human body simulation part, which is close to the explosive.
The beneficial effects of the invention are as follows:
1. the over-pressure sensor device can adjust the measuring range and the arrangement position according to different test requirements, for example, the testing range needs to be properly reduced in an explosion far field to complete more accurate data acquisition, or a plurality of groups of over-pressure sensors are additionally arranged to monitor over-pressure states of different distances simultaneously
2. According to the invention, the silica gel-based model can be replaced according to the requirements, and if the influence of the impact wave pressure on the thoracic cavity structure of a human body needs to be measured, the influence of the material performance of bones and the like need to be considered when the model is manufactured, and the silica gel-based model can be replaced equivalently;
3. according to the invention, the temperature-sensitive color-changing material can be replaced by the temperature-sensitive film material equally by measuring the damage state of the thermal effect of the skin surface layer of a certain part of the human body, the action principle of the temperature-sensitive color-changing material and the temperature-sensitive film material is basically consistent, and the thermal damage effect can be evaluated by observing the cracking degree of the temperature-sensitive film material.
On the basis of the technical scheme, the invention can be improved as follows.
Further, the human body simulation part comprises a limb simulation column and a ball head, and one end of the limb simulation column is coaxially fixed at the other end of the connecting cylinder far away from the vertical plate; the ball head is coaxially fixed at the other end of the limb simulation column far away from the vertical plate; the sticking cloth is wrapped and bonded on the outer side face of the ball head; the end tangent point of the ball head, which is close to the explosive, is positioned on the same horizontal plane with the overpressure sensor.
The adoption of the method has the further beneficial effects that:
1. the ball head structure can ensure that the shock waves can be converged at the axial position at the same response time when acting on the model in all directions;
2. the cylindrical limb simulation column can ensure the stability of the model during measurement.
Further, the temperature-sensitive color-changing material is prepared from temperature-sensitive color-changing ink or dye, and a layer of viscose is stuck on the back surface of the temperature-sensitive color-changing material for adhering to the surface of the ball head; the limb simulation column and the ball head are both made of an A/B type mixed silica gel material, the density rho 1 is more than or equal to 1.0g/cm < 3 >, and the elastic modulus is more than or equal to 0.1MPa and less than or equal to sigma 1 and less than or equal to 3.0MPa; the vertical plate is made of a material with the requirement that ρ2 is more than or equal to 1.0g/cm < 3 >, and the yield strength sigma 2 is more than or equal to 100MPa.
Further, the connecting piece comprises a connecting screw rod, a connecting screw sleeve and a connecting bolt, wherein the connecting screw rod is coaxially embedded in the limb simulation column, and one end of the connecting screw rod penetrates out of the limb simulation column and stretches into the connecting cylinder; the connecting screw sleeve is positioned in the connecting cylinder, one end of the connecting screw sleeve is in threaded connection with the extending end of the connecting screw rod extending into the connecting cylinder, and a plurality of conducting sheets are vertically fixed on the rod wall of the other end of the connecting screw rod extending into the limb simulation column at intervals; the method comprises the steps of carrying out a first treatment on the surface of the The pressure sensor is connected to the other end of the connecting screw sleeve through a bolt thread on the pressure sensor; the connecting bolt is positioned on the outer side of the vertical plate and penetrates through the vertical plate to be connected to the bolt on the pressure sensor in a threaded mode.
The detachable connection among the limb simulation column, the pressure sensor and the vertical plate is realized by using the connecting screw rod, the connecting screw sleeve and the connecting bolt, so that the replacement of various damaged parts in the later stage can be facilitated, and the practicability of the testing device is improved.
Further, the connecting screw is made of stainless steel, the material density ρ3 of the connecting screw is more than or equal to 1.0g/cm < 3 >, and the yield strength sigma < 3 > is more than or equal to 150MPa; the material requirement density ρ4 of the connecting bolt is more than or equal to 1.0g/cm < 3 >, and the yield strength sigma 4 is more than or equal to 150MPa.
Further, the stand includes: the vertical rod, the side fixing plate and the end mounting plate are positioned on one side of the vertical plate in parallel; the side fixing plate is fixed at the top end of the vertical plate, and the convex cambered surface of the cambered plate is fixed on the side fixing plate; the end mounting plate is fixed at the semi-open end of the arc-shaped plate; one end of the probe is fixed on the end mounting plate.
Further, the novel arc-shaped plate comprises an arc-shaped gasket which is paved on the concave cambered surface of the arc-shaped plate; the probe is pressed on the arc-shaped gasket.
The signal processor is connected to the tail of the probe conveniently, and the purpose of real-time acquisition of the amplifying circuit and data is achieved.
Further, the sensitivity s1 of the pressure sensor is more than or equal to 3pC/N, the force measuring range is less than or equal to-2000N, F is less than or equal to +2000N, the overload capacity OL1 is more than or equal to 150%, and the dynamic resonance frequency F2 is more than or equal to 55KHz; the signal acquisition frequency f1 of the overpressure sensor is more than or equal to 100KHz, the sensor range is 0.01MPa-100MPa, and the nonlinearity is +/-0.2% - +/-1.0%.
Further, the excitation temperature of the patch was 45 ℃.
In addition, a multi-parameter combined testing device method in an explosion field is provided, and the method specifically comprises the following steps:
s1, installing and checking a measuring device to ensure that a human body simulation part, a pressure sensor, a probe and an overpressure sensor are positioned at the same horizontal height, and the distances between the probe and the human body simulation part and between the probe and an explosion source are equal;
s2, the debugging detection device is used for checking whether the connection contact between the overpressure sensor and the pressure sensor is good, collecting data of a debugging group and checking whether a collected signal is stable, and ensuring the correctness and stability of the active test phenomenon;
s3, detonating explosive according to the safe operation rule;
s4, measuring the overpressure of the shock wave, the thermal damage degree and the pressure data in the model at a certain position, directly reading and storing the overpressure of the shock wave and the pressure data in the silica gel-based model after the explosion is finished through a computer, and collecting and recording the color change and the cracking condition of the temperature-sensitive material;
s5, setting a plurality of groups of experiments according to the needs, installing the measuring device at different positions, collecting data, carrying out data statistics, and fitting to obtain a shock wave overpressure, a thermal damage effect and a change curve of pressure data in the model along with the distance of the explosion source.
Drawings
FIG. 1 is a schematic diagram showing the internal structures of a pressure test unit and a thermal effect test unit in a combined overpressure, thermal effect and pressure test apparatus in an explosion field according to the present invention;
FIG. 2 is a schematic diagram showing the external perspective structure of a pressure test unit and a thermal effect test unit of a combined overpressure, thermal effect and pressure test apparatus in an explosion field according to the present invention;
FIG. 3 is a schematic diagram showing a partial structure of a pressure test unit in an explosion field overpressure, thermal effect and pressure combined test device according to the present invention;
FIG. 4 shows a shock wave overpressure test unit in a combined explosion field overpressure, thermal effect and pressure test apparatus according to the present invention.
In the drawings, the list of components represented by the various numbers is as follows:
1. the device comprises a vertical plate, 2, a connecting cylinder, 3, a connecting piece, 31, a connecting screw rod, 32, a connecting screw sleeve, 33, a connecting bolt, 34, a conducting sheet, 4, a human body simulation part, 41, a limb simulation column, 42, a ball head, 5, a pressure sensor, 6, a sticking cloth, 7, an overpressure sensor, 71, a probe, 72, an arc-shaped plate, 73 and a vertical frame.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
As shown in fig. 1, a multi-parameter joint test device in an explosion field includes: a pressure test unit, a thermal effect test unit and a shock wave overpressure test unit,
the pressure testing unit comprises a vertical plate 1, a connecting cylinder 2, a connecting piece 3, a human body simulation part 4 and a pressure sensor 5, wherein one end of the connecting cylinder 2 is vertically fixed on the plate surface of the vertical plate 1; one end of the human body simulation part 4 is fixed at the other end of the connecting cylinder 2 far away from the vertical plate 1; the connecting piece 3 is pre-buried in the human body simulation part 4, and one end of the connecting piece penetrates out of the human body simulation part 4 and stretches into the connecting cylinder 2; the pressure sensor 5 is positioned in the connecting cylinder 2 and is fixed on the connecting piece 3; the thermal effect test unit comprises a piece of cloth 6 made of temperature-sensitive color-changing materials, and the piece of cloth 6 is wrapped and bonded at the other end of the human body simulation part 4 far away from the connecting cylinder 2; the shock wave overpressure testing unit comprises an overpressure sensor 7, a probe 71, an arc plate 72 and a vertical frame 73, wherein the vertical frame 73 is positioned on one side of the vertical plate 1 in parallel; the arc plate 72 is fixed to the top end of the vertical frame 73; the probe 71 is coaxially arranged on the concave cambered surface of the cambered plate 72 and fixed on the stand 73, and a groove is formed in the side part of the probe 71; the overpressure sensor 7 is fixed in the recess and is on the same level as the point of tangency of the end of the humanoid unit 4 near the explosive.
In some embodiments, the anthropomorphic part 4 may include a limb simulation post 41 and a ball 42, wherein one end of the limb simulation post 41 is coaxially fixed at the other end of the connecting cylinder 2 away from the vertical plate 1; the ball head 42 is coaxially fixed at the other end of the limb simulation column 41, which is far away from the vertical plate 1; the sticking cloth 6 is wrapped and adhered on the outer side face of the ball head 42; the point of tangency of the end of the bulb 42 near the explosive is at the same level as the overpressure sensor.
In some embodiments, the temperature-sensitive color-changing material may be prepared from temperature-sensitive color-changing ink or dye, and a layer of adhesive is adhered to the back of the temperature-sensitive color-changing material for adhering to the surface of the ball 42; the limb simulation column 41 and the ball head 42 are made of A/B type mixed silica gel materials, the density rho 1 is more than or equal to 1.0g/cm < 3 >, and the elastic modulus is more than or equal to 0.1MPa and less than or equal to sigma 1 and less than or equal to 3.0MPa; the material adopted by the vertical plate 1 is required to have ρ2 of more than or equal to 1.0g/cm < 3 >, and the yield strength sigma 2 of more than or equal to 100MPa.
In some embodiments, the connecting piece 3 may include a connecting screw 31, a connecting screw sleeve 32 and a connecting bolt 33, where the connecting screw 31 is coaxially embedded in the limb simulation column 41 and one end of the connecting screw penetrates out of the limb simulation column 41 and extends into the connecting cylinder 2; the connecting screw sleeve 32 is positioned in the connecting cylinder 2, and one end of the connecting screw sleeve is in threaded connection with the extending end of the connecting screw 31 extending into the connecting cylinder 2; the pressure sensor 5 is connected with the other end of the connecting screw sleeve 32 through the screw threads of the screw bolt; the connecting bolts 33 are located outside the riser 1 and screwed to bolts on the pressure sensor 5 through the riser 1.
In some specific embodiments, the connecting screw 31 can be made of stainless steel, the material density ρ3 is more than or equal to 1.0g/cm3, and the yield strength σ3 is more than or equal to 150MPa; the material requirement density ρ4 of the connecting bolt 33 is more than or equal to 1.0g/cm3, and the yield strength sigma 4 is more than or equal to 150MPa.
In some embodiments, the stand 73 may include: the vertical rod, the side fixing plate and the end mounting plate are positioned on one side of the vertical plate 1 in parallel; the side fixing plate is fixed at the top end of the vertical plate 1, and the convex cambered surface of the cambered plate 72 is fixed on the side fixing plate; the end mounting plate is fixed at the semi-open end of the arc-shaped plate; one end of the probe 71 is fixed to the end mounting plate.
In some specific embodiments, the device can further comprise an arc-shaped gasket, wherein the arc-shaped gasket is paved on the concave cambered surface of the arc-shaped plate; the probe 71 is pressed against the arcuate pad.
Specifically, the sensitivity s1 of the pressure sensor 5 is more than or equal to 3pC/N, the force measuring range is less than or equal to-2000N, F is less than or equal to +2000N, the overload capacity OL1 is more than or equal to 150%, and the dynamic resonant frequency F2 is more than or equal to 55KHz; the signal acquisition frequency f1 of the overpressure sensor is more than or equal to 100KHz, the measuring range of the sensor is 0.01MPa-100MPa, and the nonlinearity is +/-0.2% - +/-1.0%.
Specifically, the excitation temperature of the patch 6 was 45 ℃.
In addition, the method for providing the multi-parameter combined test device in the explosion field comprises the following specific steps:
s1, installing and checking a measuring device, wherein the human body simulation part 4, the pressure sensor 5, the probe 71 and the overpressure sensor 7 are ensured to be at the same horizontal height, and the distances between the probe 71 and the human body simulation part 4 and the explosion source are equal;
s2, a debugging and detecting device is used for checking whether the connection contact between the overpressure sensor 7 and the pressure sensor 5 is good, collecting data of a debugging group and checking whether a collected signal is stable, so that the correctness and stability of the active test phenomenon are ensured;
s3, detonating explosive according to the safe operation rule;
s4, measuring the overpressure of the shock wave, the thermal damage degree and the pressure data in the model at a certain position, directly reading and storing the overpressure of the shock wave and the pressure data in the silica gel-based model after the explosion is finished through a computer, and collecting and recording the color change and the cracking condition of the temperature-sensitive material;
s5, setting a plurality of groups of experiments according to the needs, installing the measuring device at different positions, collecting data, carrying out data statistics, and fitting to obtain a shock wave overpressure, a thermal damage effect and a change curve of pressure data in the model along with the distance of the explosion source.
The foregoing is only illustrative of the present invention and is not to be construed as limiting thereof, but rather as various modifications, equivalent arrangements, improvements, etc., within the spirit and principles of the present invention.
Claims (10)
1. An explosion field multiparameter joint testing device, comprising:
the pressure testing unit comprises a vertical plate (1), a connecting cylinder (2), a connecting piece (3), a human body simulation part (4) and a pressure sensor (5), wherein one end of the connecting cylinder (2) is vertically fixed on the plate surface of the vertical plate (1); one end of the human body simulation part (4) is fixed at the other end of the connecting cylinder (2) far away from the vertical plate (1); the connecting piece (3) is pre-buried in the human body simulation part (4) and one end of the connecting piece penetrates out of the human body simulation part (4) and stretches into the connecting cylinder (2); the pressure sensor (5) is positioned in the connecting cylinder (2) and is fixed on the connecting piece (3);
the thermal effect testing unit comprises a sticking cloth (6) made of a temperature-sensitive color-changing material, and the sticking cloth (6) is wrapped and bonded at the other end of the human body simulation part (4) far away from the connecting cylinder (2);
the shock wave overpressure testing unit comprises an overpressure sensor (7), a probe (71), an arc-shaped plate (71) and a stand (73), wherein the stand (73) is positioned on one side of the stand (1) in parallel; the arc-shaped plate (72) is fixed at the top end of the vertical frame; the probe is coaxially arranged on the concave cambered surface of the arc-shaped plate (72) and fixed on the vertical frame (73), and a groove is formed in the side part of the probe (71); the overpressure sensor (7) is fixed in the groove and is positioned on the same horizontal plane with the tangent point of the end part of the anthropomorphic dummy (4) close to the explosive.
2. The multi-parameter joint test device in an explosion field according to claim 1, wherein the human body simulation part (4) comprises a limb simulation column (41) and a ball head (42), and one end of the limb simulation column (41) is coaxially fixed at the other end of the connecting cylinder (2) away from the vertical plate (1); the ball head (42) is coaxially fixed at the other end of the limb simulation column (41) far away from the vertical plate (1); the sticking cloth (6) is wrapped and adhered on the outer side face of the ball head (42); the end tangent point of the ball head (42) near the explosive is on the same level as the overpressure sensor.
3. The multi-parameter joint testing device in an explosion field according to claim 2, wherein the temperature-sensitive color-changing material is prepared from temperature-sensitive color-changing ink or dye, and a layer of adhesive is stuck on the back surface of the temperature-sensitive color-changing material for adhering to the surface of the ball head (42); the limb simulation column (41) and the ball head (42) are made of A/B type mixed silica gel materials, the density rho 1 is more than or equal to 1.0g/cm < 3 >, and the elastic modulus is more than or equal to 0.1MPa and less than or equal to sigma 1 and less than or equal to 3.0MPa; the vertical plate (1) is made of a material with the requirement that ρ2 is more than or equal to 1.0g/cm < 3 >, and the yield strength sigma 2 is more than or equal to 100MPa.
4. The multi-parameter joint testing device in an explosion field according to claim 2, wherein the connecting piece (3) comprises a connecting screw rod (31), a connecting screw sleeve (32) and a connecting bolt (33), the connecting screw rod (31) is coaxially embedded in the limb simulation column (41) and one end of the connecting screw rod penetrates out of the limb simulation column (41) to extend into the connecting cylinder (2), and a plurality of conducting strips (34) are vertically fixed on the other end of the connecting screw rod (31) extending into the limb simulation column (41) at intervals; the connecting screw sleeve (32) is positioned in the connecting cylinder (2) and one end of the connecting screw sleeve is in threaded connection with the extending end of the connecting screw rod (31) extending into the connecting cylinder (2); the pressure sensor (5) is connected to the other end of the connecting screw sleeve (32) through a bolt thread on the pressure sensor; the connecting bolt (33) is positioned on the outer side of the vertical plate (1) and penetrates through the vertical plate (1) to be connected to the bolt on the pressure sensor (5) in a threaded mode.
5. The multi-parameter joint testing device in an explosion field according to claim 4, wherein the connecting screw rod (31) is made of stainless steel, the material density ρ3 is more than or equal to 1.0g/cm3, and the yield strength σ3 is more than or equal to 150MPa; the material requirement density ρ4 of the connecting bolt (33) is more than or equal to 1.0g/cm3, and the yield strength sigma 4 is more than or equal to 150MPa.
6. The explosion field multiparameter joint test device according to claim 1, wherein the stand comprises: the vertical rod, the side fixing plate and the end mounting plate are positioned on one side of the vertical plate (1) in parallel; the side fixing plate is fixed at the top end of the vertical plate (1), and the convex cambered surface of the cambered plate is fixed on the side fixing plate; the end mounting plate is fixed at the semi-open end of the arc-shaped plate; one end of the probe is fixed on the end mounting plate.
7. The explosion field multi-parameter joint testing device according to claim 6, further comprising an arc-shaped gasket, wherein the arc-shaped gasket is laid on the concave arc surface of the arc-shaped plate (72); the probe is pressed on the arc-shaped gasket.
8. The method for testing multiple parameters in an explosion field according to claim 1, wherein the sensitivity s1 of the pressure sensor (5) is more than or equal to 3pC/N, the force measuring range is less than or equal to-2000N and less than or equal to F is less than or equal to +2000N, the overload capacity OL1 is more than or equal to 150%, and the dynamic resonance frequency F2 is more than or equal to 55KHz; the signal acquisition frequency f1 of the overpressure sensor is more than or equal to 100KHz, the sensor range is 0.01MPa-100MPa, and the nonlinearity is +/-0.2% - +/-1.0%.
9. The method of claim 1, wherein the excitation temperature of the patch (6) is 45 ℃.
10. A method as claimed in claim 1, comprising the steps of:
s1, installing and checking a measuring device, and ensuring that a human body simulation part (4), a pressure sensor (5), a probe and an overpressure sensor are positioned at the same horizontal height, and the distances between the probe and the human body simulation part (4) and the distance between the probe and an explosion source are equal;
s2, the debugging and detecting device is used for checking whether the connection line contact between the overpressure sensor (7) and the pressure sensor (5) is good, collecting data of a debugging group and checking whether a collected signal is stable, and ensuring the correctness and stability of the active test phenomenon;
s3, detonating explosive according to the safe operation rule;
s4, measuring the overpressure of the shock wave, the thermal damage degree and the pressure data in the model at a certain position, directly reading and storing the overpressure of the shock wave and the pressure data in the silica gel-based model after the explosion is finished through a computer, and collecting and recording the color change and the cracking condition of the temperature-sensitive material;
s5, setting a plurality of groups of experiments according to the needs, installing the measuring device at different positions, collecting data, carrying out data statistics, and fitting to obtain a shock wave overpressure, a thermal damage effect and a change curve of pressure data in the model along with the distance of the explosion source.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114720309A (en) * | 2022-03-14 | 2022-07-08 | 中国人民解放军国防科技大学 | Device and method for measuring work-doing capability and thermal effect coupling of blast field shock wave |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114720309A (en) * | 2022-03-14 | 2022-07-08 | 中国人民解放军国防科技大学 | Device and method for measuring work-doing capability and thermal effect coupling of blast field shock wave |
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