CN115823973B - A multi-probe positioning and acquisition device for testing detonation growth and a testing method thereof - Google Patents

Abstract

The invention relates to a multi-probe positioning and collecting device for testing detonation growth and a testing method, belongs to the technical field of ammunition engineering, and aims to solve the problems that an existing detonation testing mode cannot realize direct testing and is low in testing accuracy. The invention comprises the following steps: the device comprises a base, a grain limiting base, a probe positioning unit and a test probe; the explosive column limiting base is arranged at the center of the base, and the explosive column to be tested is arranged on the explosive column limiting base; the probe positioning unit is arranged on the base; a plurality of groups of probe positioning units are arranged in the circumferential direction of the grain to be detected; the test probe is fixedly arranged on the probe positioning unit and is abutted against the outer surface of the to-be-tested grain through the probe positioning unit. The invention monitors detonation time of a plurality of monitoring points on the surface of the grain, and further captures the emergent track of detonation waves in the grain to be tested, which are transmitted along the axis and on the side surface of the grain.

Description

A multi-probe positioning and acquisition device for testing detonation growth and a testing method thereof

Technical Field

The invention relates to the technical field of ammunition engineering, and in particular to a multi-probe positioning and collecting device for testing detonation growth and a testing method.

Background technique

The detonation and detonation sequence is an important component in the blasting system. It is a functional component that is initiated by the detonator and realizes the stable detonation of the main charge through the explosive column. In particular, in order to achieve miniaturization and improve safety, reducing the size of the explosive and achieving reliable detonation of the insensitive main explosive under a smaller explosive column is an effective way.

However, the detonation transmission process is complex, which is related to the characteristics of the explosive itself and the size and structure matching of the explosive. It involves the impact initiation of the explosive, the transmission of the detonation wave, diffraction, back-detonation and local non-detonation, which is crucial in the reliability evaluation and safety assessment of the explosion process. In the study of detonation transmission sequence, under the impact initiation of small-sized booster columns, the detonation growth process in the main charge column is a two-dimensional effect, and the obvious difference in axial and radial reaction rates determines the reliability of detonation transmission. Accurately grasping and effectively evaluating the detonation growth characteristics of the main charge under the action of boosters of different diameters is of great significance for scientifically guiding the design of detonation transmission sequence and reliability evaluation.

At present, the simplest method to study the explosion transmission effect is to judge by the pit state of the steel witness plate after the detonation, including the influence of the charge structure, constraints and the output energy of the explosive on the explosion transmission reliability, but this method lacks the understanding of the corners of the detonation process and the detonation dead zone. Another optical measurement method is to observe the propagation process of the detonation wave by observing the side surface of the exposed main charge with a high-speed scanning camera and record the propagation trajectory of the detonation wave. Due to the influence of the test environment and the lateral rarefaction wave of the air, the emission of the detonation wave on the main charge surface observed is not accurate enough. This method has relatively high requirements for the instrument and the test environment and does not accurately reflect the development process of the detonation.

Therefore, it is necessary to provide a new test device for the detonation effect to study the influence of the size structure of the detonation column on the detonation propagation of the main charge and provide a basis for the size matching of the detonation sequence.

Summary of the invention

In view of the above analysis, the present invention aims to provide a multi-probe positioning and collection device and a testing method for testing detonation growth, so as to solve the problem that the existing detonation effect testing method cannot realize direct testing and has low testing accuracy.

The purpose of the present invention is mainly achieved through the following technical solutions:

A multi-probe positioning and collecting device for testing detonation growth, comprising: a base, a charge column limiting base, a probe positioning unit and a test probe;

The medicine column limiting base is installed at the center of the base, and the medicine column to be tested is installed on the medicine column limiting base; the probe positioning unit is installed on the base;

A plurality of probe positioning units are arranged in the circumferential direction of the drug column to be tested;

The test probe is fixedly mounted on the probe positioning unit, and the test probe is pressed against the outer surface of the drug column to be tested through the probe positioning unit.

Furthermore, the probe positioning unit comprises: a vertical rotating rod and a positioning cross bar assembly; the vertical rotating rod is installed perpendicularly to the base; and the positioning cross bar assembly is vertically installed on the vertical rotating rod.

Furthermore, one end of the test probe is fixed to the end of the positioning crossbar assembly and is in close contact with the drug column to be tested; the other end of the test probe is connected to the coaxial cable signal line.

Furthermore, one end of the coaxial cable signal line is connected to a test probe, and the other end is connected to an RC pulse network generator.

Furthermore, the RC pulse network generator is connected to the dynamic signal acquisition system via a synchronization signal line.

Furthermore, the positions where the surface of the tested explosive column contacts the plurality of test probes are used as monitoring points; and the test probes are used to monitor the detonation wave emission moments of the corresponding monitoring points.

Furthermore, the probe positioning units are arranged in multiple groups and are evenly distributed in the circumferential direction of the drug column to be tested.

Furthermore, a probe positioning unit includes a plurality of groups of the positioning crossbar assemblies.

Furthermore, a plurality of groups of the positioning cross bar assemblies are installed in parallel on the vertical rotating rod.

A multi-probe positioning test method for testing detonation growth, characterized in that the test method adopts the multi-probe positioning acquisition device for testing detonation growth; the test method comprises the following steps:

Step 1: Install the charge to be tested into the multi-probe positioning and acquisition device for testing detonation growth;

Step 2: detonate the explosive column to be tested;

Step 3: Monitor multiple monitoring points on the surface of the drug column to be tested through multiple test probes.

The technical solution of the present invention can achieve at least one of the following effects:

1. The present invention adopts a multi-probe positioning and acquisition device to fix the test probe, and directly measures the moment when the detonation wave reaches different positions on the surface of the test column through the test probe, so as to capture the propagation trajectory of the detonation wave in the test column along the side axis.

2. The multi-probe positioning and acquisition device and test method for testing detonation growth of the present invention utilize the ionization and conductivity characteristics of explosive detonation waves. When the detonation wave reaches the monitoring point of the test probe, the test probe can conduct electricity instantly and transmit the pulse electrical signal to the dynamic signal acquisition system through the RC pulse network generator and cables (coaxial cable signal line, synchronous signal line). The present invention determines the moment when the detonation wave reaches different positions on the surface of the main charge column through the multi-probe positioning and acquisition device, and realizes accurate and rapid measurement of the detonation growth process of the main charge.

3. The multi-probe positioning and acquisition device for testing detonation growth of the present invention can accurately obtain the trajectory of detonation wave emission through the monitoring of multiple points on the surface of the test charge column by the test probe, study the influence of the size structure of the explosive column on the propagation of main charge detonation, and provide a basis for the size matching of the explosive sequence.

In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the description and the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings are only for the purpose of illustrating specific embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like components throughout the drawings.

FIG1 is a multi-probe positioning and acquisition device for testing detonation growth in Example 1 of the present invention;

FIG2 is a structural diagram of a medicine column limiting base in Example 1 of the present invention;

FIG3 is a structural diagram of a probe positioning unit in Embodiment 1 of the present invention;

FIG4 is a top view of the positioning crossbar assembly in Embodiment 1 of the present invention;

FIG5 is a side view of the positioning crossbar assembly in Embodiment 1 of the present invention;

FIG6 is a schematic structural diagram of the insulating end of the crossbar in Embodiment 1 of the present invention;

FIG7 is a schematic diagram of the fixing state of the insulating end of the crossbar and the probe in Example 1 of the present invention;

FIG8 is a schematic diagram of the positions of the probe measuring points on the side surface of the Chinese medicine column in Example 1 of the present invention.

Reference numerals:

1-base; 2-charge column limiting base; 3-probe positioning unit; 4-pressure relief circular hole; 5-arc-shaped slide groove; 6-base support foot; 7-vertical rotating rod; 8-test probe; 9-coaxial cable signal line; 10-RC pulse network generator; 11-synchronous signal line; 12-dynamic signal acquisition system; 13-charge column to be tested; 14-prefabricated crack; 15-positioning crossbar assembly; 16-connector; 17-positioning crossbar; 18-crossbar insulating end; 19-first limiter; 20-spring; 21-insulating bushing; 22-first fastening top screw; 23-probe positioning groove; 24-probe wiring through hole; 25-insulated end plug-in part; 26-second limiter; 27-second fastening top screw.

Detailed ways

The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

Example 1

A specific embodiment of the present invention provides a multi-probe positioning and collection device for testing detonation growth, as shown in Figures 1-8, comprising: a base 1, a charge limiting base 2, a probe positioning unit 3 and a test probe 8; the charge limiting base 2 is installed at the center of the base 1, and the charge 13 to be tested is installed on the charge limiting base 2; the probe positioning unit 3 is installed on the base 1; a plurality of groups of probe positioning units 3 are arranged in the circumferential direction of the charge 13 to be tested; the test probe 8 is fixedly installed on the probe positioning unit 3, and the test probe 8 is pressed against the outer surface of the charge 13 to be tested through the probe positioning unit 3.

Specifically, as shown in FIG. 1 , a pressure relief circular hole 4 is reserved at the center of the base 1 ; and the charge limiting base 2 is fixedly installed in the pressure relief circular hole 4 of the base 1 .

As shown in FIG. 1 , the base 1 is further provided with arc-shaped slide grooves 5 for installing the probe positioning unit 3 . There are four arc-shaped slide grooves 5 , which are evenly distributed along the circumferential direction of the pressure relief circular hole 4 .

As shown in FIG1 , a plurality of base legs 6 are arranged below the base 1; the base legs 6 are arranged perpendicular to the base 1 and are fixedly connected to the base 1 by welding or bolts; the base legs 6 are used to support the base 1. During the test, the base 1 is horizontally fixed on the ground of the test site through the base legs 6.

Specifically, the base support leg 6 is a retractable structure; the base support leg 6 includes: an adjustment sleeve and an adjustment inner rod; the interior of the adjustment sleeve is designed as a threaded hole, the outer surface of the adjustment inner rod is provided with an external thread, the adjustment inner rod and the adjustment sleeve are threadedly sleeved, and the sleeve length can be adjusted by rotating the adjustment inner rod, thereby adjusting the overall length of the base support leg 6. The adjustment sleeve is fixedly connected to the base 1, and the adjustment inner rod is supported on the ground. By adjusting the length of each base support leg 6, the base 1 can be adjusted to remain level when the ground is uneven.

As shown in FIG. 2 , the drug column limiting base 2 includes: a disc mounting portion and a cylindrical drug column fixing portion.

Specifically, the disc mounting portion of the drug column limiting base 2 is installed in the pressure relief circular hole 4 of the base 1. The cylindrical drug column fixing portion is arranged at the center of the disc mounting portion, and a drug column mounting groove is arranged inside the cylindrical drug column fixing portion; the diameter of the drug column mounting groove is equal to the diameter of the cylindrical drug column to be tested 13. The drug column to be tested 13 is arranged in the drug column mounting groove and is supported and positioned by the drug column mounting groove.

Further, as shown in Fig. 2, a plurality of prefabricated cracks 14 are provided on the disc mounting portion of the charge limiting base 2, and the prefabricated cracks 14 are used to prevent the shock wave generated when the charge 13 to be tested explodes from damaging the base 1. Specifically, the prefabricated cracks 14 include a plurality of arc-shaped cracks distributed along the circumferential direction of the charge limiting base 2 and a plurality of linear cracks extending along the radial direction of the charge limiting base 2.

The following describes the probe positioning unit 3:

In a specific embodiment of the present invention, as shown in Fig. 4, the probe positioning unit 3 comprises: a vertical rotating rod 7 and a positioning crossbar assembly 15. Specifically, as shown in Fig. 4, the vertical rotating rod 7 is installed perpendicularly to the base 1; the positioning crossbar assembly 15 is vertically installed on the vertical rotating rod 7.

In a specific embodiment of the present invention, the vertical rotating rod 7 includes: an upper cylindrical section, a middle boss, and a lower stud section. Specifically, the stud section of the vertical rotating rod 7 is inserted into the arc-shaped slide groove 5 on the base 1, and the stud section is threaded with a fixing nut, and the vertical rotating rod 7 can be clamped and fixed on the base 1 by tightening the fixing nut; the base 1 is located between the fixing nut and the boss.

Furthermore, the probe positioning unit 3 also includes: a connecting member 16 .

The connecting member 16 is provided with a first mounting hole and a second mounting hole, and the first mounting hole and the second mounting hole are perpendicular to each other.

As shown in FIG3 , the connector 16 is sleeved and installed on the cylindrical section of the vertical rotating rod 7; specifically, a first mounting hole is provided on the connector 16, and the vertical rotating rod 7 is inserted and installed in the first mounting hole of the connector 16, and an insulating bushing 21 is provided between the vertical rotating rod 7 and the connector 16. The connector 16 is sleeved and installed on the vertical rotating rod 7 through the first mounting hole, and can rotate around the axis of the vertical rotating rod 7. A fastening bolt that passes through the first mounting hole is provided on the side surface of the connector 16, and the connector 16 can be fixed on the vertical rotating rod 7 by tightening the fastening bolt.

Furthermore, the positioning cross bar assembly 15 is installed on the vertical rotating rod 7 through a connecting member 16 .

Specifically, the positioning crossbar assembly 15 is installed in the second mounting hole of the connecting member 16. Since the first mounting hole and the second mounting hole are perpendicular, the positioning crossbar assembly 15 is perpendicular to the vertical rotating rod 7.

Furthermore, as shown in FIG. 4 and FIG. 5 , the positioning cross bar assembly 15 includes: a positioning cross bar 17 , a cross bar insulating end 18 , a first stopper 19 , a spring 20 and a first fastening screw 22 .

Specifically, the positioning cross bar 17 is slidably installed in the second mounting hole of the connecting member 16; the second mounting hole is a rectangular hole, and the second mounting hole is rectangular and can limit the rotation of the positioning cross bar 17 in the second mounting hole, and the positioning cross bar 17 can slide relative to the connecting member 16.

Specifically, the first limiter 19 and the spring 20 are both sleeved and installed on the positioning cross bar 17, as shown in FIG5 . The first limiter 19 is provided with a first fastening screw 22, and the first limiter 19 and the positioning cross bar 17 can be relatively fixed or relatively slipped by tightening or loosening the first fastening screw 22. The spring 20 is arranged between the first limiter 19 and the connecting member 16.

During implementation, by adjusting the installation position of the first limiter 19 on the positioning cross bar 17 , the length of the positioning cross bar 17 passing through the connecting member 16 can be adjusted, and then the insulating end 18 of the cross bar is pressed against the surface of the drug column 13 to be tested by the spring 20 .

Further, as shown in FIG3 , the positioning crossbar assembly 15 further includes: a second stopper 26 and a second fastening top screw 27. The second stopper 26 is disposed at the end of the positioning crossbar 17, and the first stopper 19 and the second stopper 26 are located on both sides of the connecting member 16. The second stopper 26 is provided with a second fastening top screw 27, and the second stopper 26 and the positioning crossbar 17 can be relatively fixed or relatively slipped by tightening or loosening the second fastening top screw 27. The first fastening top screw and the second fastening top screw are used to fix the first stopper 19 and the second stopper 26 on the positioning crossbar 17, respectively.

Further, as shown in Figures 6 and 7, the crossbar insulating end 18 is provided with a penetrating probe wiring through hole 24 and a cylindrical insulating end plug-in portion 25. The insulating end plug-in portion 25 of the crossbar insulating end 18 matches the plug-in hole of the positioning crossbar 17, and the crossbar insulating end 18 is installed at the end of the positioning crossbar 17 through the hole-column matching plug-in.

Specifically, the test probe 8 is composed of two enameled wires that are wound together into a spiral shape, and the parts where the two enameled wires are wound together are insulated from each other, and the other ends expose the metal wires.

Furthermore, the positioning cross bar 17 and the cross bar insulating end 18 are both hollow tubes.

The positioning cross bar 17 is provided with a threading through hole, and the probe wiring through hole 24 of the cross bar insulation end 18 is connected with the threading through hole of the positioning cross bar 17 to form a channel for the test probe 8 to pass through.

Furthermore, the insulating end 18 of the crossbar is provided with an offset front end face, and the front end face is perpendicular to the positioning crossbar 17; a linear probe positioning groove 23 is provided on the front end face. The probe positioning groove 23 is used to fix the test probe 8 on the front end face of the insulating end 18 of the crossbar. As shown in Figures 6 and 7, after the end of the test probe 8 passes through the probe wiring through hole 24, the part of the test probe 8 extending out of the probe positioning groove 23 is bent backward, and the two enameled wire ends at the end of the test probe 8 are separated and bonded to the side of the insulating end 18 of the crossbar with insulating tape. Specifically, the probe positioning grooves 23 of multiple groups of positioning crossbar assemblies 15 of the same probe positioning unit 3 are all installed horizontally, and the offset direction is consistent.

During implementation, the test probe 8 is fixed tightly on the side surface of the drug column 13 to be tested through multiple probe positioning units 3, and one end of the test probe 8 with the exposed metal wire passes through the rear end of the positioning cross bar 17 and is connected to the coaxial cable signal line 9. The signal input channel of the RC pulse network generator 10 is connected to each test probe 8 through the coaxial cable signal line 9; the dynamic signal acquisition system 12 is connected to the signal output channel of the RC pulse network generator 10 through the synchronization signal line 11.

By adjusting the installation position and number of the connecting member 16 on the vertical rotating rod 7, the installation height, position and number of the positioning cross bar 17 can be adjusted at will. By adjusting the direction of the positioning cross bar 17, the axial direction of the positioning cross bar 17 is directed to the explosion center. By adjusting the position of the first limiter 19, the length of the positioning cross bar 17 extending out of the connecting member 16 is adjusted. The test probe 8 on the front end surface of the cross bar insulating end 18 is closely contacted with the drug column 13 to be tested, and the axial direction of the positioning cross bar 17 is directed to the axis of the drug column 13 to be tested.

As shown in Figures 6 and 7, the test probe 8 is passed through the insulating end 18 of the cross bar and the positioning cross bar 17, and the test probe 8 is clamped and fixed in the probe positioning groove 23 on the front end surface of the insulating end 18 of the cross bar, and the excess part is bent backwards, and the cross section of the test probe 8 is separated and fixed to the side of the insulating end 18 of the cross bar with insulating tape. During the test, the two forks are connected under the ionization action of the detonation wave to realize the monitoring of the detonation moment of the detection point.

In a specific embodiment of the present invention, one end of the test probe 8 is fixed to the end of the positioning crossbar assembly 15 and is in close contact with the drug column 13 to be tested; the other end of the test probe 8 is connected to the coaxial cable signal line 9. One end of the coaxial cable signal line 9 is connected to the test probe 8, and the other end is connected to the RC pulse network generator 10. The RC pulse network generator 10 is connected to the dynamic signal acquisition system 12 via the synchronization signal line 11.

In a specific embodiment of the present invention, the positions where the surface of the drug column 13 to be tested contacts the multiple test probes 8 are used as monitoring points; the test probes 8 are used to monitor whether detonation occurs at the corresponding monitoring points. Specifically, as shown in FIG1 , there are four groups of probe positioning units 3, which are evenly distributed in the circumferential direction of the drug column 13 to be tested. As shown in FIG3 , one probe positioning unit 3 includes four groups of positioning cross bar assemblies 15. The four groups of positioning cross bar assemblies 15 are installed in parallel on the vertical rotating rod 7.

In this embodiment, four probe positioning units 3 are installed, and four positioning cross bar assemblies 15 are installed on each probe positioning unit 3, totaling sixteen positioning cross bar assemblies 15 to fix sixteen test probes 8; correspondingly, sixteen monitoring points are set on the side surface of the drug column 13 to be tested; the position distribution of the monitoring points is shown in Figure 8.

Example 2

The present invention provides a multi-probe positioning test method for testing detonation growth. The test method uses the multi-probe positioning collection device for testing detonation growth of Example 1 to test the explosive column 13 to be tested.

The test method comprises the following steps:

Step 1: Install the to-be-tested explosive column 13 into the multi-probe positioning and acquisition device for testing detonation growth;

Step 2: detonating the explosive column 13 to be tested;

Step 3: multiple monitoring points on the surface of the drug column 13 to be tested are monitored by multiple testing probes 8 .

In step 1, the installation process of the drug column 13 to be tested includes:

Step S11: fix the base 1 horizontally on the ground of the test site through the base legs 6;

Step S12: installing the medicine column limiting base 2 in the pressure relief circular hole 4 in the center of the base 1, and installing the medicine column 13 to be tested in the medicine column installation groove on the medicine column limiting base 2;

Step S13: Insert the lower end of the vertical rotating rod 7 into the arc-shaped slide groove 5 of the base 1; thread a fixing nut on the stud section at the lower end of the vertical rotating rod 7, and fix the vertical rotating rod 7 on the base 1 by tightening the fixing nut; sleeve an insulating bushing 21 on the upper cylindrical section of the vertical rotating rod 7, and insert the cylindrical section of the vertical rotating rod 7 into the first mounting hole of the connecting piece 16.

Step S14: Assembling the positioning cross bar assembly 15 and slidingly installing the positioning cross bar assembly 15 on the connecting member 16;

Step S15: Install the test probe 8 on the positioning crossbar assembly 15; adjust the positioning crossbar assembly 15, point the axis direction of the positioning crossbar assembly 15 to the axis of the drug column 13 to be tested, and make the test probe 8 press against the outer surface of the drug column 13 to be tested.

Furthermore, in step S14, the assembly process of the positioning crossbar assembly 15 is as follows:

S14-1. Insert the insulating end connector 25 of the insulating end of the crossbar 18 into the plug hole at one end of the positioning crossbar 17, and mount the insulating end of the crossbar 18 on the end of the positioning crossbar 17 by matching the column hole; rotate the insulating end of the crossbar 18 so that the probe positioning groove 23 on the front end surface is horizontal, and the bias direction of the front end surfaces of the plurality of insulating ends of the crossbar 18 on the same group of probe positioning units 3 is consistent;

S14-2. The first limit member 19 and the spring 20 are sequentially mounted on the other end of the positioning cross bar 17, and the first fastening screw 22 is installed on the side of the first limit member 19; the positioning cross bar 17 is inserted into the second mounting hole on the connecting member 16, and the spring 20 is arranged between the connecting member 16 and the first limit member 19.

S14-3: A second limiting member 26 is sleeved and installed on the end of the positioning cross bar 17 passing through the connecting member 16 , and a second fastening top screw 27 is installed on the side of the second limiting member 26 .

When the first fastening screw 22 is tightened, the first limiting member 19 is fixedly installed on the positioning cross bar 17; when the second fastening screw 27 is tightened, the second limiting member 26 is fixedly installed on the positioning cross bar 17, and the positioning cross bar 17 is limited by the first limiting member 19 and the second limiting member 26, so that the positioning cross bar 17 will not be separated from the connecting member 16.

Furthermore, in step S15, the installation process of the test probe 8 is as follows:

S15-1. The test probe 8 is composed of two enameled wires wound into a spiral shape, and the parts of the two enameled wires wound together are insulated from each other; one end of the test probe 8 is passed through the wire threading hole inside the positioning cross bar 17 and the probe wiring through hole 24 of the insulating end 18 of the cross bar in sequence, and comes out from the probe wiring through hole 24 of the insulating end 18 of the cross bar.

S15-2. Fix the protruding part of the test probe 8 in the probe positioning groove 23 on the end surface of the crossbar insulation end 18, and bend the part of the test probe 8 protruding from the probe positioning groove 23 backward, separate the two enameled wires at the end of the test probe 8 and adhere them to the side of the crossbar insulation end 18 with insulating tape. The other end of the test probe 8 exposes the metal wire, and is connected to the coaxial cable signal line 9 through the two metal wires.

Furthermore, in step S15, the adjustment process of the positioning crossbar assembly 15 is as follows:

S15-3: Adjust the height and axis direction of the positioning crossbar assembly 15;

Loosen the fastening bolts on the side of the connecting piece 16 so that the connecting piece 16 can slide along the vertical rotating rod 7 and rotate around the axis of the vertical rotating rod 7; drag the connecting piece 16 and the positioning cross bar assembly 15 to slide along the axis direction of the vertical rotating rod 7 to adjust the height of the positioning cross bar assembly 15; rotate the connecting piece 16 and the positioning cross bar assembly 15 to adjust the axis of the positioning cross bar assembly 15 to point to the axis of the drug column 13 to be tested; after adjusting the positioning cross bar assembly 15 to the required height and direction according to the test requirements, re-tighten the fastening bolts on the connecting piece 16 to fix it.

S15-4: adjusting the position of the positioning crossbar assembly 15 according to the distance between the side surface of the drug column 13 to be tested and the vertical rotating rod 7, so that the test probe 8 is in close contact with the drug column 13 to be tested;

First, loosen the first fastening screw 22 to allow the first stopper 19 to slide along the positioning cross bar 17;

Then, the first limiting member 19 is moved to reduce the distance between the first limiting member 19 and the connecting member 16 so that the spring 20 is compressed; the first fastening screw 22 is tightened to fix the first limiting member 19 and the positioning cross bar 17;

Finally, when the spring 20 is in a compressed state, the elastic force of the spring 20 can push the first limit member 19 to move in a direction away from the connecting member 16, thereby driving the positioning cross bar 17 and the insulating end of the cross bar 18 to move in the direction of the drug column to be tested 13, so that the test probe 8 on the insulating end of the cross bar 18 can be pressed against the surface of the drug column to be tested 13.

Furthermore, by adjusting the multiple groups of positioning crossbar assemblies 15 , the multiple test probes 8 are brought into contact with the multiple monitoring points on the surface of the drug column 13 to be tested.

Furthermore, in step 3, when the monitoring point of the test explosive column 13 is detonated, the two enameled wires at the end of the test probe 8 are turned on in the detonation ionization environment, and at the same time, the electrical signal can be transmitted to the RC pulse network generator 10 and the dynamic signal acquisition system 12 in sequence through the coaxial cable signal line 9 and the synchronization signal line 11, thereby realizing the monitoring of the detonation time of multiple monitoring points.

Furthermore, in step 3, after the explosive column 13 to be tested is detonated, the detonation time of multiple monitoring points on the outer surface of the explosive column 13 to be tested is monitored by multiple test probes 8 to detect the detonation process and explosion transmission process of the explosive column 13 to be tested.

Compared with the prior art, the technical solution provided by the present invention has at least one of the following beneficial effects:

1) The present invention provides a multi-probe positioning and collecting device for testing detonation growth. By adjusting the number of vertical rotating rods 7, the number of connecting pieces 16 and their installation positions on the vertical rotating rods 7, the installation height and number of the positioning cross bars 17 can be adjusted arbitrarily; the present invention can be directly installed in an explosion test site and has sufficient strength and rigidity to resist explosion impact.

2) The multi-probe positioning and collecting device for testing detonation growth of the present invention is designed with prefabricated cracks 14 on the charge limiting base 2 to prevent the base from being damaged by shock waves during the test; and multiple tests can be carried out by only replacing the charge limiting base 2 and the positioning cross bar assembly 15, which is easy to assemble and has low cost.

3) The present invention provides a spring 20 and a first limit member 19 for pre-tightening on the positioning cross bar 17, and a rotatable design of the connecting member 16 on the vertical rotating rod 7, so that the positioning cross bar assembly 15 can adjust the position, and multiple positioning cross bar assemblies 15 move independently without interfering with each other, ensuring that multiple test probes 8 can be in close contact with the corresponding monitoring points on the drug column 13 to be tested, so as to ensure the measurement accuracy of the multi-channel probe.

4) The multi-probe positioning and collecting device for testing detonation growth of the present invention has an insulating layer between the probe positioning cross bar and the vertical rotating rod, and the end of the positioning cross bar is also made of insulating material, which can prevent the interference between channels caused by the short circuit of the multi-channel probe in the detonation ionization environment, thereby improving the accuracy of the signal. The multi-probe positioning and collecting device for testing detonation growth of the present invention is made of stainless steel or ordinary carbon steel surface sprayed with plastic, which not only has sufficient strength and rigidity, but also has good corrosion resistance in various atmospheric environments.

5) The present invention also discloses a method for testing the detonation growth process of explosives. Compared with the traditional optical shooting method, this method avoids the influence of air rarefaction waves on the detonation propagation process of exposed charge, collects the electrical signal of the detonation ionization conduction probe to monitor the detonation process, and can more accurately measure the characteristic parameters of the detonation wave.

6) The multi-probe positioning and acquisition device for testing detonation growth of the present invention can monitor the detonation process of the test explosive column 13 of different sizes by adjusting the position of the positioning crossbar assembly 15, and obtain several characteristic parameters such as the first emission position, the back-blast diffraction area, the curvature change area (detonation growth area), the stable detonation area, and the local non-detonation area (detonation dead zone) to characterize the detonation evolution process, which has greater scalability.

The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims (10)

1. A multi-probe positioning and collecting device for testing detonation growth, characterized in that it comprises: a base (1), a charge column limiting base (2), a probe positioning unit (3) and a test probe (8); A pressure relief circular hole (4) is reserved in the center of the base (1); a drug column limiting base (2) is fixedly installed in the pressure relief circular hole (4) of the base (1), and a drug column (13) to be tested is installed on the drug column limiting base (2); The probe positioning unit (3) comprises: a vertical rotating rod (7) and a positioning crossbar assembly (15); The base (1) is also provided with an arc-shaped slide groove (5) for installing the probe positioning unit (3), and the stud section of the vertical rotating rod (7) is inserted into the arc-shaped slide groove (5) on the base (1); A plurality of prefabricated cracks (14) are arranged on the disc mounting portion of the charge limiting base (2); A plurality of probe positioning units (3) are arranged in the circumferential direction of the drug column (13) to be tested; The test probe (8) is fixedly mounted on the probe positioning unit (3), and the test probe (8) is pressed against the outer surface of the drug column (13) to be tested through the probe positioning unit (3). 2. The multi-probe positioning and collection device for testing detonation growth according to claim 1, characterized in that the vertical rotating rod (7) is installed perpendicular to the base (1); and the positioning cross bar assembly (15) is installed perpendicularly on the vertical rotating rod (7). 3. The multi-probe positioning and collection device for testing detonation growth according to claim 2 is characterized in that one end of the test probe (8) is fixed to the end of the positioning crossbar assembly (15) and is in close contact with the test charge column (13); the other end of the test probe (8) is connected to the coaxial cable signal line (9). 4. The multi-probe positioning and acquisition device for testing detonation growth according to claim 3, characterized in that one end of the coaxial cable signal line (9) is connected to the test probe (8), and the other end is connected to the RC pulse network generator (10). 5. The multi-probe positioning and acquisition device for testing detonation growth according to claim 4, characterized in that the RC pulse network generator (10) is connected to the dynamic signal acquisition system (12) via a synchronization signal line (11). 6. The multi-probe positioning and collection device for testing detonation growth according to claim 5 is characterized in that the positions where the surface of the tested explosive column (13) contacts with the multiple test probes (8) are used as monitoring points; and the test probes (8) are used to monitor the detonation wave emission moments of the corresponding monitoring points. 7. The multi-probe positioning and collecting device for testing detonation growth according to claim 6, characterized in that the probe positioning units (3) are arranged in multiple groups and are evenly distributed in the circumferential direction of the explosive column (13) to be tested. 8. The multi-probe positioning and collection device for testing detonation growth according to any one of claims 2 to 7, characterized in that one probe positioning unit (3) comprises a plurality of groups of the positioning crossbar assemblies (15). 9. The multi-probe positioning and collecting device for testing detonation growth according to claim 8, characterized in that a plurality of groups of the positioning crossbar assemblies (15) are installed in parallel on the vertical rotating rod (7). 10. A multi-probe positioning test method for testing detonation growth, characterized in that the test method adopts the multi-probe positioning collection device for testing detonation growth according to any one of claims 1 to 9; the test method comprises the following steps: Step 1: installing the to-be-tested explosive column (13) into the multi-probe positioning and collecting device for testing detonation growth; Step 2: detonating the explosive column to be tested (13); Step 3: Using a plurality of test probes (8), a plurality of monitoring points on the surface of the drug column (13) to be tested are monitored.