CN110595661A - Wireless acquisition device for explosion free field shock wave test - Google Patents
Wireless acquisition device for explosion free field shock wave test Download PDFInfo
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- CN110595661A CN110595661A CN201910793767.7A CN201910793767A CN110595661A CN 110595661 A CN110595661 A CN 110595661A CN 201910793767 A CN201910793767 A CN 201910793767A CN 110595661 A CN110595661 A CN 110595661A
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- remote controller
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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 discloses a wireless acquisition device for testing explosion free field shock waves, which comprises a remote controller and an acquisition instrument; the remote controller comprises a box, a state monitoring button, a mainboard, a display screen, a radio station connector, a power plug, a remote controller switch, a remote controller cover plate and an instruction button; the cover plate is connected with the remote controller box; the main board is arranged in the remote controller box; the display screen is embedded in the center of the cover plate; the state monitoring button and the instruction button are arranged on the cover plate; the box is provided with a remote controller radio station connector, a power plug and a remote controller switch; the acquisition instrument comprises a box, a cover plate, a main plate, an SD card seat, a power plug, an acquisition instrument radio station connector, an SMA connector, an auxiliary plate and a switch; the cover plate is connected with the box; the main board and the auxiliary board are both arranged in the box; the box is provided with an SD card seat, a power plug, a radio station connector, an SMA connector and a switch. The invention can improve the anti-interference performance of acquisition and reduce the signal distortion degree.
Description
Technical Field
The invention belongs to the field of explosion field shock wave testing, and particularly relates to a wireless acquisition device for explosion free field shock wave testing.
Background
The overpressure of the shock wave is closely related to the energy density of the wave front. Upon detonation of the ammunition, a large amount of energy is immediately released, with the production of high temperature explosive products and shock waves. The shock wave is the fluctuation formed by the fact that the explosive core pressure rises rapidly at the moment of explosion of ammunition and pushes surrounding air to vibrate violently, belongs to a typical non-steady random signal, and has the characteristics of steep rising edge, high initial value, high attenuation speed, short duration and the like. The shock wave test is an important research object in the field of explosion dynamics and also an important basis for determining the damage degree of weapons.
Currently, there are two main methods for studying the impact wave damage effect: explosion test and numerical simulation. The former mainly arranges a testing device in a field environment according to requirements, and measures the curve of the pressure of each distribution system along with the change of time by using a sensor; the latter is to obtain simulation results through software programming and analyze the simulation results. Although accurate shock wave parameters can be obtained by using an explosion test method, the cost is extremely high, so that a plurality of domestic and foreign scholars try to use a numerical simulation method and arrange a set of theoretical calculation formula suitable for the explosion test on the basis of the prior actual measurement experience. However, these formulas are calculated according to the equivalent conversion of standard TNT explosives, and the ammunition which we actually test is generally provided with a casing, which results in a large error between the calculated value and the data which is actually required to be obtained. Although the numerical simulation method has the characteristics of simplicity in operation, manpower and material resource saving, shortening of the research and development period and the like, the method is not widely used due to self limitations. Therefore, based on the analysis of the above two methods, obtaining the shock wave parameter value through the explosion test is the most accurate way at present. The traditional explosion free field shock wave test system is obviously interfered by environmental factors, such as line length, wiring direction and the like, so that the error between the test result of ground overpressure and the actual power evaluation of ammunition is larger, the signal attenuation is obvious, the test data is inaccurate, and the final result does not depend on a spectrum. The original test system stores data in FLASH, the storage and reading speed is slow, and the single test period is long.
Disclosure of Invention
The invention aims to provide a wireless acquisition device for testing explosion free field shock waves, which is used for shortening the circuit layout, reducing the environmental influence, improving the anti-interference performance and reducing the signal distortion degree.
The technical solution for realizing the purpose of the invention is as follows:
a wireless acquisition device for testing explosion free field shock waves comprises a remote controller and an acquisition instrument;
the remote controller comprises a remote controller box, a state monitoring button, a remote controller mainboard, a display screen, a remote controller radio station connector, a power plug, a remote controller switch, a remote controller cover plate and an instruction button;
the remote controller cover plate is connected with the remote controller box; the remote controller mainboard is arranged in the remote controller box; the display screen is embedded in the center of the cover plate of the remote controller; the state monitoring button and the instruction button are arranged on the remote controller cover plate; the remote controller box is provided with a remote controller radio station connector, a remote controller power plug and a remote controller switch;
the acquisition instrument comprises an acquisition instrument box, an acquisition instrument cover plate, an acquisition instrument main plate, an SD card seat, an acquisition instrument power plug, an acquisition instrument radio station connector, an SMA connector, an acquisition instrument auxiliary plate and an acquisition instrument switch;
the acquisition instrument cover plate is connected with the acquisition instrument box; the acquisition instrument main board and the acquisition instrument auxiliary board are both arranged in the acquisition instrument box, adopt an up-down laminated structure and are connected through male and female pins; the acquisition instrument box is provided with an SD card seat, an acquisition instrument power plug, an acquisition instrument radio station connector, an SMA connector and an acquisition instrument switch.
Compared with the prior art, the invention has the following remarkable advantages:
(1) the acquisition instrument main board and the acquisition instrument auxiliary board are of an upper and lower laminated structure and are connected through the male pin and the female pin, wiring between board layers is reduced, signal interference is reduced, radio station communication is adopted, circuit layout is shortened, environmental influence is reduced, high anti-interference performance is achieved, and signal distortion is reduced.
(2) The invention adopts internal and external triggering double insurance, after the remote controller is used for pressing the instruction button, if the signal of explosion shock wave is detected within a period of time, the data acquisition card acquires data of 1s before and after the wave crest signal, thus not only ensuring that the sample of the data is not overlarge, but also avoiding false data acquisition caused by false triggering
(3) The invention finally stores the data collected by the test in the SD card, and can repeatedly test for many times, and the operation of plug and play, data copy or deletion and the like is convenient.
Drawings
Fig. 1 is a schematic diagram of a remote controller according to the present invention.
Fig. 2 is a schematic view of the acquisition instrument of the present invention.
Detailed Description
The invention is further described with reference to the following figures and embodiments.
With reference to fig. 1, the wireless collecting device for testing the blast free field shock wave of the invention comprises a remote controller and a collecting instrument;
the remote controller comprises a remote controller box 1, a state monitoring button 2, a remote controller mainboard 3, a display screen 4, a remote controller radio station connector 6, a power plug 7, a remote controller switch 8, a remote controller cover plate 10 and an instruction button 11;
the remote controller cover plate 10 is connected with the remote controller box 1 through a bolt 5; the remote controller mainboard 3 is arranged in the remote controller box 1 and is connected through bolts; the remote controller cover plate 10 is provided with a display screen port and a button port; the display screen 4 is embedded in a display screen opening in the center of the remote controller cover plate 10; the state monitoring button 2 and the instruction button 11 are arranged at a button opening at the lower part of the remote controller cover plate 10, and the upper end surface of the state monitoring button is attached to the remote controller cover plate 10; the remote controller radio station connector 6, the remote controller power plug 7 and the remote controller switch 8 are respectively arranged on a window at the top of the remote controller box 1 from left to right;
the acquisition instrument comprises an acquisition instrument box 12, an acquisition instrument cover plate 21, an acquisition instrument main board 13, an SD card seat 14, a first male pin and female pin header 15, an acquisition instrument power plug 17, an acquisition instrument radio station connector 18, an SMA connector 20, a second male pin and female pin header 22, an acquisition instrument auxiliary board 23 and an acquisition instrument switch 24;
the acquisition instrument cover plate 21 is connected with the acquisition instrument box 12 through a bolt 16; gather appearance mainboard 13 and gather appearance subplate 23 and all arrange inside collection appearance box 12 in, gather appearance mainboard 13 and gather appearance subplate 23 and adopt upper and lower laminated structure, link to each other through public female pin 15 of first public mother, the public female pin 22 of second lock between the two, it reduces signal interference to walk the line between the reduction sheet layer. The acquisition instrument main board 13 is fixed inside the acquisition instrument box 12 through a bolt 19; the SD card seat 14 is arranged on the left side of the acquisition instrument main board 13; the acquisition instrument power plug 17 and the acquisition instrument radio station connector 18 are arranged on the upper part of the acquisition instrument box 12; the SMA connector 20 is arranged on the right side of the acquisition instrument main board 13; the SMA connector 20 is opened at the right side of the acquisition instrument box 12 and is exposed; the harvester switch 24 is disposed on the underside of the harvester box 12.
Further, the instruction button 11 is used for external triggering, and an external trigger signal is input to an external trigger signal processing module located on the remote controller main board 3 to obtain a vertical transfer pulse PV and a counting trigger pulse F, so that a trigger instruction is started; the acquisition instrument main board 13 has an internal trigger function. The acquisition instrument main board 13 has an internal trigger function.
Furthermore, the position of the state monitoring button 2, the display screen 4, the remote controller radio station connector 6, the remote controller power plug 7 and the remote controller switch 8 corresponding to the remote controller box 1 are provided with a connecting hole or a connecting groove; the SD card seat 14, the acquisition instrument power plug 17, the acquisition instrument radio station connector 18, the SMA connector 20 and the acquisition instrument switch 24 are also provided with connecting holes or connecting grooves corresponding to the positions of the acquisition instrument box 12; the function of connecting with other devices and man-machine interaction is achieved.
Further, the external radio station is directly connected to the remote controller radio station connector 6 and the acquisition instrument radio station connector 18, and the same baud rate, frequency band and other parameters are set.
Further, the SD card seat 14 is disposed on the left side of the acquisition instrument main board 13 and exposed from the corresponding opening of the acquisition instrument box 12, so that the SD card can be inserted and pulled conveniently. The SD card is inserted into the card seat before the test, and is taken out after the test is finished to obtain test data, so that a plurality of SD cards can be prepared, the test process can be used alternately, and the test time is reduced.
Preferably, the remote controller box 1, the remote controller cover plate 10, the acquisition instrument box 12 and the acquisition instrument cover plate 21 all adopt a 3D printing technology, are made of high-precision photosensitive resin, have the mass not exceeding 500 grams and are convenient to carry.
Preferably, the joint of the SMA joint 20 is exposed out of the acquisition instrument box 12, so that a worker can conveniently screw the SMA data wire during the test.
Furthermore, the first male pin header 15 and the second male pin header 22 are 20 × 2 pin headers with a distance of 2.54mm, and function as power supply, data communication and common ground.
When the SMA wire connector is used, the SMA wire required by the test acquisition channel is connected to the SMA connector 20 and screwed, the SD card is inserted into the SD card seat 14, the SD card connector is connected with the remote controller power supply 7 and the acquisition instrument power supply 17, and the remote controller switch 8 and the acquisition instrument switch 24 are turned on, so that the working state is achieved, the operation is simple and convenient, and a complicated connection wiring device is avoided;
according to the test requirement, the wireless acquisition instrument is arranged at a test point of an explosion field, a tester holds a remote controller and is located in a safety area, the test is started, the tester presses a state detection button 2, the acquisition instrument can transmit test information in real time and display the test information on a display screen 4 of the remote controller, after the preparation is finished, the tester presses an external trigger instruction button and starts to detonate, the acquisition instrument starts to perform data acquisition, recording and storage work, meanwhile, the display screen performs countdown prompt, and the final test is completed. The whole test system is embedded into a test environment, complex installation and wiring are not needed, the structure is simple and reliable, wireless transmission is stable in real time, the anti-interference capability is strong, and the signal-to-noise ratio is high;
the power supply of the wireless acquisition instrument is closed, the SD card in the wireless acquisition instrument is taken back, the SD card can be directly circulated for multiple tests after being replaced, the previous test data can be processed and checked through a computer, the test period is shortened, and the physical consumption of testers is reduced. After all tests are completed, the power supply is turned off, the test SMA wire is unscrewed, and the SMA wire can be directly stored without finishing. The whole process is simple to operate, the labor intensity of testers is greatly reduced, and unnecessary repetitive work is avoided.
Can support inside outside dual fail-safe trigger mode simultaneously, when experimental, if equipment adopts inside to trigger as the sampling start signal, because inside triggers and receives the interference easily, easily with interfering signal misidentification as signal sampling start signal, lead to sampling in advance. External sampling requires that the sampling time is advanced and a sufficient sampling rate is ensured, so that an indefinite amount of blank data is included in the processed data. Therefore, in the internal/external trigger dual fail-safe mode, when the command button 11 is pressed by the remote controller and the signal of the explosion shock wave is detected within a set time, the data of 1s before and after the wave peak signal is collected by the collector. Therefore, the data sampling can be ensured not to be overlarge, and the false data acquisition caused by false triggering can be avoided. And a double-insurance triggering mode of internal triggering of a program and external triggering of an instruction is adopted, so that the condition that explosion is not triggered or explosion triggering is asynchronous is avoided.
Claims (8)
1. A wireless acquisition device for testing explosion free field shock waves comprises a remote controller and an acquisition instrument; it is characterized in that the preparation method is characterized in that,
the remote controller comprises a remote controller box (1), a state monitoring button (2), a remote controller mainboard (3), a display screen (4), a remote controller radio station connector (6), a power plug (7), a remote controller switch (8), a remote controller cover plate (10) and an instruction button (11);
the remote controller cover plate (10) is connected with the remote controller box (1); the remote controller mainboard (3) is arranged in the remote controller box (1); the display screen (4) is embedded in the center of the remote controller cover plate (10); the state monitoring button (2) and the instruction button (11) are arranged on the remote controller cover plate (10); the remote controller box is provided with a remote controller radio station connector (6), a remote controller power plug (7) and a remote controller switch (8);
the acquisition instrument comprises an acquisition instrument box (12), an acquisition instrument cover plate (21), an acquisition instrument main plate (13), an SD card seat (14), an acquisition instrument power plug (17), an acquisition instrument radio station connector (18), an SMA connector (20), an acquisition instrument auxiliary plate (23) and an acquisition instrument switch (24);
the acquisition instrument cover plate (21) is connected with the acquisition instrument box (12); the acquisition instrument main board (13) and the acquisition instrument auxiliary board (23) are both arranged in the acquisition instrument box (12), and are in an up-down laminated structure and are connected through male and female pins; the acquisition instrument box (12) is provided with an SD card seat (14), an acquisition instrument power plug (17), an acquisition instrument radio station connector (18), an SMA connector (20) and an acquisition instrument switch (24).
2. The wireless collection device for explosive free field shock wave test according to claim 1,
the instruction button (11) is used for external triggering, an external trigger signal is input to an external trigger signal processing module located on a remote controller mainboard (3) to obtain a vertical transfer pulse PV and obtain a counting trigger pulse, and therefore starting of a trigger instruction is achieved; the acquisition instrument main board (13) has an internal trigger function; when a command button (11) is pressed, if a signal of explosion shock wave is detected within a set time, the acquisition instrument acquires data of 1s before and after the wave crest signal.
3. The wireless acquisition device for the explosion free field shock wave test according to claim 1, wherein the position of the state monitoring button (2), the display screen (4), the remote controller radio station connector (6), the remote controller power plug (7) and the remote controller switch (8) corresponding to the remote controller box (1) are provided with a connecting hole or a connecting groove; SD cassette (14), collection appearance power plug (17), collection appearance radio station connector (18), SMA joint (20), the position that collection appearance switch (24) correspond collection appearance box (12) also all are equipped with connecting hole or spread groove.
4. The wireless collecting device for the blast free field shock wave test according to claim 1, wherein the external radio station is directly connected to the remote controller radio station connector (6) and the collecting instrument radio station connector (18), and the same baud rate, frequency band and other parameters are set.
5. The wireless acquisition device for the explosion free field shock wave test according to claim 1, wherein the remote controller box (1), the remote controller cover plate (10), the acquisition instrument box (12) and the acquisition instrument cover plate (21) all adopt 3D printing technology, and the materials are high-precision photosensitive resin.
6. The wireless acquisition device for the explosive free field shock wave test according to claim 1, wherein the joint at the SMA joint (20) is exposed out of the acquisition instrument box (12).
7. The wireless acquisition device for the explosion free field shock wave test according to claim 1, wherein the SD card seat (14) is arranged at the left side of the acquisition instrument main board (13) and is exposed from the corresponding opening of the acquisition instrument box (12).
8. The wireless acquisition device for the blast free field shock wave test according to claim 1, wherein the remote controller radio station connector (6), the remote controller power plug (7) and the remote controller switch (8) are respectively arranged on the top window of the remote controller box (1) from left to right.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910793767.7A CN110595661A (en) | 2019-08-27 | 2019-08-27 | Wireless acquisition device for explosion free field shock wave test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910793767.7A CN110595661A (en) | 2019-08-27 | 2019-08-27 | Wireless acquisition device for explosion free field shock wave test |
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| Publication Number | Publication Date |
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| CN110595661A true CN110595661A (en) | 2019-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910793767.7A Pending CN110595661A (en) | 2019-08-27 | 2019-08-27 | Wireless acquisition device for explosion free field shock wave test |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112525407A (en) * | 2020-11-20 | 2021-03-19 | 北京理工大学 | Shock wave single multi-sensor array testing method and device |
| CN115406321A (en) * | 2022-09-26 | 2022-11-29 | 三峡大学 | Electronic detonator anti-explosion identification method based on air shock waves |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112525407A (en) * | 2020-11-20 | 2021-03-19 | 北京理工大学 | Shock wave single multi-sensor array testing method and device |
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| CN115406321A (en) * | 2022-09-26 | 2022-11-29 | 三峡大学 | Electronic detonator anti-explosion identification method based on air shock waves |
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Application publication date: 20191220 |