CN209841599U - Weighing device and PBX explosive column automatic density tester - Google Patents
Weighing device and PBX explosive column automatic density tester Download PDFInfo
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- CN209841599U CN209841599U CN201920438058.2U CN201920438058U CN209841599U CN 209841599 U CN209841599 U CN 209841599U CN 201920438058 U CN201920438058 U CN 201920438058U CN 209841599 U CN209841599 U CN 209841599U
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Abstract
The utility model discloses a weighing device for a PBX explosive column automatic density tester, which comprises a rack, a lifting mechanism, a sling component, a weighing component and a tray, wherein the weighing component comprises a scale pan and an electronic scale platform; the lifting mechanism comprises a fixed end and a stretching end, the fixed end of the lifting mechanism is installed on the rack, the stretching end of the lifting mechanism is connected with the tray, the scale is arranged on the tray, the tray can drive the scale to move up and down, and the electronic scale is fixed on the rack and is connected with the scale through the sling component. The utility model discloses a weighing device can realize replacing artifical the measurement completely, reduces required artifical quantity, reduces operating personnel's task volume, and can effectively reduce the error of the explosive column density that records through this method, has solved explosive part density batch measurement's quantity demand and precision demand.
Description
Technical Field
The utility model relates to an explosive column density measurement technical field, in particular to weighing device, automatic density tester of PBX explosive column.
Background
The density of the pressed PBX explosive part is an important index of the forming performance, and the density measurement is usually accurate to 0.001g/cm according to the technical condition requirement3. The method for measuring the density of the explosive column by using the drainage method is operated underwater, is safe and reliable, does not need to know the volume of the explosive column, and only needs to obtain the density of distilled water, the dry weight and the wet weight of the explosive column at room temperature, so that the method is an ideal method. The method is characterized in that the weighing of the wet weight is the most critical and tedious, the traditional weighing method adopts manual operation, a thin nylon rope is firstly used for fastening the explosive column, then the explosive column is hung in water for weighing, in the actual operation, in order to simplify the calculation process, the wet weight and the dry weight of the rope are directly defaulted to be equal, when the explosive column is small, the measurement mode can cause larger system error, and the judgment on whether the density of the explosive column is qualified or not can be directly influenced when the explosive column is serious.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming not enough among the above-mentioned background art, providing a weighing device, automatic density tester of PBX explosive column and test method, can realize the density of more accurate, more efficient measurement little explosive column, especially the diameter is phi 10 mm-phi 60 mm's explosive column density, simultaneously, through the utility model discloses an automatic density tester of PBX explosive column can realize replacing artifical the measurement completely, reduces required artifical quantity, reduces operating personnel's task load, and passes through the utility model provides a method can effectively reduce the error of the explosive column density that records, has satisfied explosive part density batch measurement's quantity demand and precision demand.
In order to achieve the technical effect, the utility model discloses take following technical scheme:
a weighing device for a PBX explosive column automatic density tester comprises a rack, a lifting mechanism, a sling component, a weighing component and a tray, wherein the weighing component comprises a weighing scale and an electronic weighing platform; the electronic scale comprises a rack, a lifting mechanism, a scale pan, a lifting mechanism and a lifting mechanism, wherein the lifting mechanism comprises a fixed end and an extension end, the fixed end of the lifting mechanism is arranged on the rack, the extension end of the lifting mechanism is connected with the scale pan, the scale pan is arranged on the scale pan, the scale pan can drive the scale pan to move up and down, and the electronic scale pan is fixed on the rack and is connected; the utility model discloses a weighing device mainly used drainage method measures in the method of PBX explosive column density, adopt drainage method can not introduce extra power heat amazing, can ensure the security in the test, and simultaneously, the utility model discloses a weighing device need collocation basin or flourishing water containers such as beaker when specifically carrying out the weight test of PBX explosive column to use together, before wet weight is peeld, through elevating system and tray with the measuring position of weighing-pan submergence in the basin of measuring station and control elevating system messenger tray and balance separation, make the weighing-pan hang on the electronic weighing platform through the hoist cable subassembly, and to the whole zero clearing processing of doing of the hoist cable subassembly that the electronic weighing-pan weighed with the wet weight of weighing-pan, when weighing wet weight, lift the weighing-pan through elevating system and tray and leave below the liquid level no more than a millimeter (generally for about 2mm below the liquid level), place the explosive column in the weighing-pan, rethread elevating system and tray make the tray with the measuring position that the weighing-pan submergence sinks in the basin of measuring station and control elevating system and make the tray The scale pan is separated from the scale pan, so that the scale pan is suspended on the electronic weighing platform through the sling component, and the numerical value displayed by the electronic weighing platform at the moment is read as the wet weight of the PBX explosive column. Specifically, when weighing the wet weight of the PBX explosive column, the scale pan is not lifted out of the water surface, so that the influence of bubbles introduced when the scale pan sinks into the water again on the accuracy of the wet weight can be avoided, and the height of the PBX explosive column which is the smallest generally is about 3mm, so that the scale pan can be lifted to be about 2mm below the liquid level.
Furthermore, the side edge of the scale pan is provided with a positioning hole, a positioning cone matched with the positioning hole is arranged at the corresponding position of the tray, the scale pan and the tray are positioned through the positioning cone and the positioning hole, and the scale pan and the tray can be ensured to be separated from or combined without deviation.
Further, the rack includes roof, curb plate, bottom plate and two spinal branch daggers, the curb plate is used for connecting one side of roof and bottom plate, and two spinal branch daggers are used for connecting the opposite side of roof and bottom plate, and the trilateral design of opening in front of the rack, back, left side promptly can be convenient for operating personnel observes the measuring condition at any time, also makes things convenient for the manipulator to snatch the explosive column, the roof is used for placing the electron weighing platform and satisfies simultaneously and hangs the method measurement requirement down for cavity design, and elevating system's stiff end is installed on the curb plate, provides the support for elevating system by the curb plate, can keep elevating system's lift.
Further, the scale is multistage scale, and the bottom and the terminal surface of scale design for the trompil design, wherein, multistage design can realize that the grain passes through scale step location, it is accurate to ensure that the grain places the position, and be difficult for floating the aversion under water, resistance when the trompil design not only can reduce the entering aquatic has also avoided the influence that the rivers are undulant to weighing wet weight, be equipped with the multistage groove at the scale center, preferably set up 3 steps, and every step height 4 millimeters to adapt to putting of common different specification grains.
Furthermore, the sling component comprises a sling rack and sling wires, wherein the sling rack is cross-shaped and is suspended on the electronic weighing platform, the sling wires are provided with at least 4 sling wires, one end of each sling wire is connected with the sling rack, and the other end of each sling wire is connected with the weighing scale.
Furthermore, the lifting mechanism is a pneumatic sliding table, so that no dangerous factors such as electric sparks and the like are generated in the moving process; and after the medicine column is placed, the scale can be gently placed into water by the lifting mechanism, and small disturbance can be kept.
Furthermore, the rack is made of aluminum alloy materials, the sling component is made of carbon fiber materials, particularly, ultra-light superfine carbon fiber wires with the diameter being smaller than or equal to 50 microns are selected as sling wires, system errors can be reduced, the sling rack is built by carbon fiber rods, and the sling rack is light in weight and reliable in strength.
Meanwhile, the utility model also discloses an automatic density tester of PBX explosive column, including the above-mentioned weighing device, still include rack, feed table, automatic grabbing manipulator, electrical control cabinet, manipulator control cabinet, measuring station, wherein, the rack surface is the operation panel, electrical control cabinet, manipulator control cabinet are installed in the rack, the weighing device is installed on measuring station, is equipped with the basin on the measuring station, the automatic grabbing manipulator is used for grabbing PBX explosive column in the feed table and placing in the weighing device's scale pan; wherein, in order to ensure that the automatic manipulator that snatchs can not bring the disturbance to the measuring station in service, need take solitary fixed mode to the measuring station, establish measuring station and rack into two independent parts piecing together if can adopt, make it be two parts of mutual isolation to avoid the automatic disturbance that snatchs the manipulator during operation and cause to influence the water tank, and then ensure that weighing device is in steady state, guarantee its accuracy of weighing.
Compared with the prior art, the utility model, following beneficial effect has:
the utility model discloses a PBX explosive column weighing device, automatic density tester of PBX explosive column and test method thereof utilize Archimedes' principle, improve through special structural design and weighing method, have satisfied the quantity demand and the precision demand of explosive part density batch measurement. On the safety aspect, the utility model discloses adopt the drainage method to measure when test PBX explosive column density, can not introduce extra strength and heat amazing, can ensure the measuring security, on the efficiency of measurement aspect, the utility model discloses can realize automatic measurement and calculation, its work efficiency is far above traditional manual operation, on measurement accuracy, the utility model discloses a design the weighing device of a brand-new structure, can make the quality measurement's of PBX explosive column in aqueous error compare traditional manual measurement method and reduce 4-6 order of magnitude, very big promotion measurement accuracy, consequently, the technical scheme of the utility model can realize the target of accurate high-efficient measurement explosive part density.
Drawings
Fig. 1 is a schematic view of the weighing device for the PBX explosive column automatic density tester of the present invention.
Fig. 2 is a schematic view of a multi-step scale of the weighing apparatus of the present invention.
Fig. 3 is a schematic view of a sling assembly of the weighing apparatus of the present invention.
Fig. 4 is a schematic view of the lifting mechanism of the weighing apparatus of the present invention.
Fig. 5 is a schematic diagram of the PBX explosive column automatic density tester of the present invention.
Figure 6 is a schematic diagram of the variation of sling wire immersion in water when measuring the mass of PBX explosive column in water.
Reference numerals: 1-weighing device, 11-rack, 12-lifting mechanism, 13-tray, 14-scale, 15-electronic scale, 16-sling rack, 17-sling wire, 111-top plate, 112-side plate, 113-bottom plate, 114-support column, 121-guide rod, 131-positioning cone, 141-positioning hole, 142-multi-stage groove, 2-cabinet, 3-feeding plate, 4-automatic grabbing manipulator, 5-electric control cabinet, 6-manipulator control cabinet, 7-emergency stop button, 8-measuring table, 9-water tank and 10-PBX explosive column.
Detailed Description
The present invention will be further illustrated and described with reference to the following examples.
Example (b):
the first embodiment is as follows:
as shown in fig. 1, a weighing device for a PBX explosive column automatic density tester includes a rack 11, a lifting mechanism 12, a sling component, a weighing component and a tray 13.
The weighing component comprises a scale pan 14 and an electronic weighing platform 15; the lifting mechanism 12 comprises a fixed end and a stretching end, the fixed end of the lifting mechanism 12 is installed on the rack 11, the stretching end of the lifting mechanism 12 is connected with the tray 13, the scale pan 14 is arranged on the tray 13, the tray 13 can drive the scale pan 14 to move up and down, and the electronic scale platform 15 is fixed on the rack 11 and is connected with the scale pan 14 through a sling component.
Specifically, in this embodiment, the rack 11 includes a top plate 111, a side plate 112, a bottom plate 113 and two supporting columns 114, the side plate 112 is used to connect one side of the top plate 111 and the bottom plate 113, the two supporting columns 114 is used to connect the other side of the top plate 111 and the bottom plate 113, that is, the front, back and left sides of the rack 11 are open, so that an operator can observe the measurement situation at any time and conveniently grasp the explosive column by a manipulator, the top plate 111 is hollow and is used to place the electronic scale 15 and meet the measurement requirement of the hanging method, the fixed end of the lifting mechanism 12 is installed on the side plate 112, the side plate 112 provides support for the lifting mechanism 12, so that the lifting operation of the lifting mechanism 12 can be kept stable, and preferably, in this embodiment, the rack 11 is made of an.
As shown in fig. 3, the sling assembly of the present embodiment comprises a sling rack 16 and 4 sling wires 17, wherein the sling rack 16 is cross-shaped and suspended on the electronic weighing platform 15, one end of each of the 4 sling wires 17 is connected to the sling rack 16, and the other end of each of the sling wires 17 is connected to the weighing platform 14. Preferably, in this embodiment, the sling component is made of carbon fiber, specifically, the sling wire 17 is made of ultra-light ultra-fine carbon fiber wire with a diameter of 50 μm or less, which can reduce system errors, and the sling holder 16 is built by carbon fiber rods, which is light in weight and reliable in strength.
As shown in fig. 2, in this embodiment, scale 14 is multistage scale 14, and scale 14's bottom and terminal surface are the trompil design, multistage design can realize that the cartridge passes through scale 14 step location, it is accurate to ensure that the cartridge places the position, and be difficult for floating the aversion under water, resistance when the trompil design not only can reduce scale 14 and get into aquatic, the influence of rivers fluctuation to wet weight weighing has also been avoided, it is concrete, be equipped with multistage groove 142 at scale 14 center, the preferred 3 steps that set up, and every step height 4 millimeters, in order to adapt to putting of common different specification cartridges.
Preferably, the side of the scale pan 14 is provided with a positioning hole 141, the corresponding position of the tray 13 is provided with a positioning cone 131 matching with the positioning hole 141, the scale pan 14 and the tray 13 are positioned by the positioning cone 131 and the positioning hole 141, and no deviation can be ensured when the scale pan 14 is separated from or combined with the tray 13.
As shown in fig. 4, the lifting mechanism 12 in this embodiment is a pneumatic sliding table, and the moving end of the pneumatic sliding table is connected to the tray 13 through the guide rod 121, so that no dangerous factors such as electric spark and the like are generated in the moving process; and after the medicine column is placed, the scale pan 14 can be gently placed into the water by the lifting mechanism 12, and small disturbance can be kept.
The utility model discloses an in the method of weighing device 1 mainly used drainage method measurement PBX explosive column 10 density, adopt the drainage method can not introduce extra power heat amazing, can ensure the security in the test, simultaneously, the utility model discloses a weighing device 1 need flourishing water containers such as basin 9 or beaker of arranging when specifically carrying out the weight test of PBX explosive column 10 and use together, specifically do: before wet weight peeling, a scale pan 14 is sunk to a measuring position in a water tank 9 through an elevating mechanism 12 and a tray 13, the elevating mechanism 12 is controlled to separate the tray 13 from the scale pan 14, the scale pan 14 is suspended on an electronic scale platform 15 through a sling component, the sling component weighed by the electronic scale platform 15 and the wet weight of the scale pan 14 are all subjected to zero clearing treatment, when the wet weight of the PBX explosive is weighed, the scale pan 14 is lifted to be about 2mm below the liquid level through the elevating mechanism 12 and the tray 13, the PBX explosive column 10 is placed in the scale pan 14, the scale pan 14 is sunk to a measuring position in the water tank 9 of a measuring platform 8 through the elevating mechanism 12 and the tray 13, the tray 13 is separated from the scale pan 14 through the sling component, the scale pan 14 is suspended on the electronic scale platform 15, and the value displayed by the electronic scale platform 15 at the moment is read to be the wet weight of the explosive column 10.
Example two
As shown in fig. 5, an automatic density tester for PBX explosive column includes a weighing device 1 according to the first embodiment, and further includes a cabinet 2, a feeding tray 3, an automatic grabbing manipulator 4, an electrical control cabinet 5, a manipulator control cabinet 6, and a measuring table 8, wherein the surface of the cabinet 2 is an operation table, the electrical control cabinet 5 and the manipulator control cabinet 6 are installed in the cabinet 2, the weighing device 1 is installed on the measuring table 8, a water tank 9 is arranged on the measuring table 8, and the automatic grabbing manipulator 4 is used for grabbing the explosive column 10 in the feeding tray 3 and placing the explosive column in a weighing tray 14 of the weighing device 1.
The manipulator control cabinet 6 is used for controlling the automatic grabbing manipulator 4 to grab the PBX explosive column 10 in the feed tray 3, place the PBX explosive column 10 in the scale pan 14 of the weighing device 1 for measuring the underwater quality, and take out the PBX explosive column 10 after measurement from the scale pan 14 and place the PBX explosive column back in the feed tray 3. The electrical control cabinet 5 is used for controlling the lifting motion of the pneumatic sliding table, the electronic weighing platform 15 can be used for respectively measuring the quality of the PBX explosive column 10 in the air and the quality of the PBX explosive column 10 in the water, measured data are transmitted to the data processing unit of the control room, and testers can directly obtain the specific conditions of the current test in the control room in real time, so that unmanned operation of a test site is realized, and the safety is improved.
Preferably, an emergency stop button 7 is further provided on the operation table so that the test operation of the PBX explosive column automatic density tester is stopped by the emergency stop button 7.
Specifically, the specific steps of implementing the density test of the PBX explosive column 10 by the automatic density tester for PBX explosive columns are as follows:
A. measurement of the mass m of a PBX explosive column 10 in air by means of an electronic weighing platform 151；
B. A scale pan 14 is sunk into a measuring position in a water tank 9 of the measuring platform 8 through a lifting mechanism 12 and a tray 13, the lifting mechanism 12 is controlled to separate the tray 13 from the scale pan 14, and the scale pan 14 is suspended on an electronic weighing platform 15 through a sling component;
C. zero clearing treatment is carried out on the wet weights of the sling component weighed by the electronic weighing platform 15 and the weighing pan 14;
D. the scale pan 14 is lifted to about 2mm below the liquid level through the lifting mechanism 12 and the tray 13, and the automatic grabbing manipulator 4 grabs the PBX explosive column 10 in the feeding tray 3 and places the PBX explosive column in the scale pan 14;
E. sinking the scale pan 14 into the measuring position in the water tank 9 of the measuring platform 8 through the lifting mechanism 12 and the tray 13, controlling the lifting mechanism 12 to separate the tray 13 from the scale pan 14, hanging the scale pan 14 on the electronic scale platform 15 through the sling component, reading the numerical value displayed by the electronic scale platform 15 at the moment as the mass m of the PBX explosive column 10 in the water2；
F. Calculating 10 density rho of PBX explosive columnMeasuring，Where ρ iswIs the density of water.
Different from manual operation and measurement method, the utility model discloses a two points of improvement are done in order to reduce the error to wet weight weighing method among the measurement method:
firstly, before measuring the quality of the PBX explosive column 10 in water, the scale pan 14 and the sling component are lowered to the measuring position and then peeled off as a whole in the method of this embodiment, and secondly, on the premise of ensuring the use strength, the diameter of the sling wire 17 in this embodiment is not more than 50 μm.
Specifically, in the present embodimentAdopted to calculate the density rho of the PBX explosive column 10MeasuringIs disclosed as:
where ρ isMeasuringFor measured PBX explosive column 10 density values, rhowIs the density of distilled water at room temperature, m1Mass m of PBX explosive column 10 in air2Is the mass of the PBX explosive column 10 in the water.
This time is:
m1＝m (2)
m2＝m-(Δv'0+v)ρw (3)
wherein m is the mass of the PBX explosive column 10, v is the volume of the PBX explosive column 10,. DELTA.v'0The weighing of the suspension wires 17 to the absolute value of the difference in volume of the PBX explosive cylinder 10 immersed in water before and after the mass in water (i.e. the change in volume of the suspension wires 17 immersed in water twice in steps B and E) results from the change in the liquid level caused before and after the PBX explosive cylinder 10 is added to water, which results in an increase in the volume of the suspension wires 17 immersed in water when the scale pan 14 is immersed in the same measuring position in the water tank 9 of the measuring station 8, as shown in fig. 6.
The formula (2) and the formula (3) are taken into the formula (1) to obtain:
where ρ is the actual density of the PBX explosive column 10.
Therefore, in the method of the present invention, the system error isIn the conventional manual measurement method, a tester holds the PBX explosive column 10 by a rope and immerses the PBX explosive column into water, the whole volume of the rope immersed into water causes system errors, and in the automatic measurement method, only the part of the rope immersed into water with the changed volume brings the system errors, and the rest part of the rope immersed into water brings the system errorsThe branch is eliminated in the peeling process, so that the system error can be greatly reduced. Furthermore, since the scale pan 14 is suspended by 4 suspension wires 17 having a diameter of not more than 50 μm without using a rope-based drug column, systematic errors can be further reduced.
Further, in the measuring method of the present invention, Δ v'0The following relationship exists with respect to PBX explosive column 10 volume:
wherein S is0The total cross-sectional area, S, of 4 suspension wires 17cFormula (5) is substituted for formula (4) to obtain the floor area of sink 9 and v is the volume of PBX explosive column 10:
assuming that the cross section of the water tank 9 in this embodiment is a circular shape having a diameter of 350mm and each of the suspension wires 17 has a diameter of 50 μm for a total of four, the systematic error becomes-8 x10 in this case-8Compared with the traditional measuring method, the system error is reduced by 4-6 orders of magnitude, is much smaller than the measuring precision of the balance, and can be ignored, so that the measuring precision is greatly improved.
It is to be understood that the above embodiments are merely exemplary embodiments that have been employed to illustrate the principles of the present invention, and that the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. A weighing device for a PBX explosive column automatic density tester is characterized by comprising a rack, a lifting mechanism, a sling component, a weighing component and a tray, wherein the weighing component comprises a weighing scale and an electronic weighing platform; the lifting mechanism comprises a fixed end and a stretching end, the fixed end of the lifting mechanism is installed on the rack, the stretching end of the lifting mechanism is connected with the tray, the scale is arranged on the tray, the tray can drive the scale to move up and down, and the electronic scale is fixed on the rack and is connected with the scale through the sling component.
2. The weighing apparatus of claim 1, wherein the scale is provided with positioning holes at its side, and positioning cones at corresponding positions on the tray for matching with the positioning holes, and the scale and the tray are positioned by the positioning cones and the positioning holes.
3. The weighing device of claim 1, wherein the rack comprises a top plate, a side plate, a bottom plate and two support columns, the side plate is used for connecting one side of the top plate and the bottom plate, the two support columns are used for connecting the other side of the top plate and the bottom plate, the top plate is hollow and is used for placing an electronic weighing platform and simultaneously meets the measurement requirement of a hanging-down method, and the fixed end of the lifting mechanism is installed on the side plate.
4. The weighing apparatus of claim 1, wherein the scale is a multi-step scale, and the bottom and end surfaces of the scale are open holes, and a multi-step slot is formed in the center of the scale.
5. The weighing apparatus of claim 4, wherein the multi-step scale is made of antistatic polymer material, and the multi-step trough comprises 3 steps each with a height of 4 mm.
6. The weighing apparatus of claim 1, wherein the sling assembly comprises a sling rack and sling wires, wherein the sling rack is cross-shaped and is suspended on the electronic weighing platform, the sling wires comprise at least 4 sling wires, one end of each sling wire is connected with the sling rack, and the other end of each sling wire is connected with the weighing pan.
7. The weighing apparatus of claim 5, wherein the rack is made of aluminum alloy and the sling assembly is made of carbon fiber.
8. The weighing apparatus of claim 6, wherein the diameter of the suspension wires is no more than 50 μm.
9. The weighing apparatus of claim 1, wherein the lifting mechanism is a pneumatic slide.
10. The PBX explosive column automatic density tester is characterized by comprising the weighing device as claimed in any one of claims 1 to 9, and further comprising a cabinet, a feeding tray, an automatic grabbing mechanical arm, an electric control cabinet, a mechanical arm control cabinet and a measuring table, wherein the surface of the cabinet is an operating table, the electric control cabinet and the mechanical arm control cabinet are installed in the cabinet, the weighing device is installed on the measuring table, a water tank is arranged on the measuring table, and the automatic grabbing mechanical arm is used for grabbing a PBX explosive column in the feeding tray and placing the PBX explosive column in a weighing tray of the weighing device.
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| CN201920438058.2U CN209841599U (en) | 2019-04-02 | 2019-04-02 | Weighing device and PBX explosive column automatic density tester |
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| CN201920438058.2U CN209841599U (en) | 2019-04-02 | 2019-04-02 | Weighing device and PBX explosive column automatic density tester |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109883881A (en) * | 2019-04-02 | 2019-06-14 | 中国工程物理研究院化工材料研究所 | A kind of weighing device, PBX explosive column automatic density tester and its test method |
| CN111678837A (en) * | 2020-07-31 | 2020-09-18 | 秦素容 | Explosive fuse is with too ampere of false density detection device |
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2019
- 2019-04-02 CN CN201920438058.2U patent/CN209841599U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109883881A (en) * | 2019-04-02 | 2019-06-14 | 中国工程物理研究院化工材料研究所 | A kind of weighing device, PBX explosive column automatic density tester and its test method |
| CN109883881B (en) * | 2019-04-02 | 2024-02-13 | 中国工程物理研究院化工材料研究所 | Weighing device, PBX explosive column automatic density tester and testing method thereof |
| CN111678837A (en) * | 2020-07-31 | 2020-09-18 | 秦素容 | Explosive fuse is with too ampere of false density detection device |
| CN111678837B (en) * | 2020-07-31 | 2023-03-10 | 秦素容 | Explosive fuse is with too ampere of false density detection device |
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