CN211013351U - Device for measuring temperature and pressure of transient flow field of explosion field - Google Patents
Device for measuring temperature and pressure of transient flow field of explosion field Download PDFInfo
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- CN211013351U CN211013351U CN201921541160.1U CN201921541160U CN211013351U CN 211013351 U CN211013351 U CN 211013351U CN 201921541160 U CN201921541160 U CN 201921541160U CN 211013351 U CN211013351 U CN 211013351U
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Abstract
The utility model discloses a device for measuring temperature and pressure of an explosion field transient flow field, relating to the technical field of damage assessment, the device for measuring the temperature and the pressure of the transient flow field of the explosion field comprises a front end cover, a graphene pressure sensor, a thermocouple temperature sensor, an outer cylinder, a chamber protection ring, an inverted switch and a circuit module, wherein the upper surface of the front end cover is provided with mounting holes in an annular array, and the front end cover is arranged in the explosive chamber at the bottom of the shell through the mounting hole, the device provided by the utility model has simple structure, convenient installation and small volume, when in use, the device is fixed on the mounting position only through threaded connection, the cost is low, the processing is easy, in addition, the use requirement of an explosion field can be satisfied, the normal output of the sensor can be ensured in the measuring time, the obtained measuring curve is normal, the long-term heat preservation can be realized along with the ammunition, and the long-term waiting can be realized in the heat preservation state after the heat preservation is finished.
Description
Technical Field
The utility model belongs to the technical field of destroy the aassessment, concretely relates to explosion field transient flow field temperature and pressure measurement device.
Background
The damage assessment is a process of comprehensively considering factors such as weapon ammunition power, target vulnerability, bullet action environment and the like, comprehensively estimating and evaluating the damage efficiency/effect of the ammunition to the target according to damage action rules and damage data, and shock waves are one of important damage sources generated by explosion and are important indexes for representing the ammunition explosion power. The shock wave pressure, namely the pressure load on the target structure during explosion, is a source of structural damage and is the basis for evaluating the damage effect. During the explosive explosion process, the temperature and the shock wave are transient variation parameters. Due to the high temperature, high pressure and high speed airflow in the explosion field and the accompanying chemical reaction, the explosion temperature is difficult to be measured accurately. For thermal damage effects, the detonation temperature can be used as a parameter for evaluating the performance of explosives. The explosion temperature can be directly used for evaluating the performance of the medicament and is also the basis for researching the heat conduction, heat radiation and temperature distribution rule in the explosion process. Therefore, the shock wave pressure measurement and the explosion temperature measurement have great significance for damage effect evaluation.
At present, the main methods for testing the pressure of shock waves in a bore include: copper post (ball) method, the lead wire method, put into formula electricity method, but measuring device can only realize the measurement to the interior single point pressure of thorax among the prior art, and measuring device adopts the conventional high temperature pressure sensor of oil charge isolated structure mostly, however this type of sensor has very big limitation in the use, if bulky, be unfavorable for the miniaturization of product, and complex operation during the installation, the installation of the device of being not convenient for is fixed, the thermal expansion coefficient mismatch influences the pressure measurement precision easily between silicon oil and the chip simultaneously, non-gas tightness in the sensor sealing leads to the oil impregnate easily in addition, the oil leak, damage pressure sensor.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an explosion field transient flow field temperature and pressure measurement device to solve the problem that proposes in the above-mentioned background art, reach and press the change curve to carry out the precision measurement to explosion field temperature and thorax, compensate the not enough purpose of conventional pressure sensor.
In order to achieve the above object, the utility model provides a following technical scheme: an explosion field transient flow field temperature and pressure measuring device comprises a front end cover, a graphene pressure sensor, a thermocouple temperature sensor, an outer barrel, a bore protection ring, an inverted switch and a circuit module, wherein the upper surface of the front end cover is provided with mounting holes in an annular array, the front end cover is mounted in a explosive chamber at the bottom of a shell through the mounting holes, the bottom of the front end cover is in threaded connection with a sensor clamp through threads, the graphene pressure sensor and the thermocouple temperature sensor are mounted inside the sensor clamp, a second cushion pad is clamped at the bottom inside the sensor clamp, a first cushion pad is clamped inside the second cushion pad, a cavity groove is formed inside the first cushion pad, epoxy resin sealing layers are symmetrically arranged on two sides inside the cavity groove, and the inverted switch, the circuit module and a battery are sequentially mounted inside the cavity groove from left to right, the inverted switch, the circuit module and the battery are sealed by the epoxy resin sealing layer, the first cushion pad and the second cushion pad, the outer barrel is sleeved outside the sensor clamp, and the bottom of the outer barrel is further screwed with a chamber protection ring.
Preferably, the graphene pressure sensor comprises a package shell, the interior of the package shell is a hollow installation interlayer, a pressure sensing device and a signal processing unit are arranged in the hollow installation interlayer, and the signal processing unit transmits signals to the circuit module.
Preferably, the circuit module is composed of a charge amplifier, a transient waveform recorder, a high-frequency crystal oscillator with an infrared interface positioned on a panel and a power supply controller, and mainly completes the functions of conditioning, sampling storage, data communication and the like of output signals of the sensor.
Preferably, the circuit module is controlled by a power supply controller and an inversion switch, and the inversion switch is powered on only after being continuously inverted for a set time, so as to avoid the situation of power-on error.
Preferably, the outer part of the lower half section of the graphene pressure sensor is provided with a mounting thread, and the mounting thread is matched with a mounting hole groove formed in the sensor clamp.
Preferably, the upper surface of protecting the thorax ring is seted up and is the installation screw that annular array distributes, and protects the outside of thorax ring and still be equipped with the screw thread, protect the thorax ring and pass through installation screw and screw thread mountable inside the shell.
Preferably, the battery adopts a chargeable polymer lithium ion battery with a low-temperature formula to provide a power supply, the nominal voltage is 3.6V, the battery capacity is 45mAh under the normal-temperature and high-temperature environment, and the battery capacity is 30mAh under the environment of minus 40 ℃.
Preferably, the second cushion pad has the same structure as the first cushion pad, and both the second cushion pad and the first cushion pad are made of foamed aluminum material.
Preferably, the sensor clamp is internally provided with a fixing hole matched with the graphene pressure sensor and the thermocouple temperature sensor, so that the graphene pressure sensor and the thermocouple temperature sensor can be conveniently installed.
Preferably, the front end cover, the outer cylinder and the bore protection ring are all made of ultra-high strength maraging steel, and the yield strength of the maraging steel after heat treatment can reach 1000MPa, so that the graphene pressure sensor, the thermocouple temperature sensor, the battery, the circuit module and the like are protected from being damaged in a high-temperature and high-pressure environment.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the device provided by the utility model simple structure, the installation of being convenient for, it is small, only need during the use to fix the device on mounted position through threaded connection can.
(2) The device provided by the utility model the preparation material acquires easily, low cost, easily processing.
(3) The utility model provides a device can satisfy the operation requirement in explosion field, can guarantee the normal output of sensor in measuring time, and the measurement curve of acquireing is normal, can keep warm along with the ammunition for a long time, can wait for under the heat preservation state for a long time after keeping warm.
(4) The utility model provides a device can realize the intelligent function of certain degree, and the operation adopts the non-contact mode, can deposit the test data and according to given filename, handles test data, shows the rifling pressure curve, each mark point data, forms report file etc. according to the rule that military standard stipulated.
Drawings
FIG. 1 is a sectional view of the overall structure of the present invention;
fig. 2 is a top view of the present invention;
fig. 3 is a front view of the graphene pressure sensor of the present invention;
FIG. 4 is a schematic structural view of the chamber protection ring of the present invention;
FIG. 5 is a schematic view of a first cushion of the present invention;
in the figure: 1-front end cover; 2-a graphene pressure sensor; 21-mounting screw threads; 3-thermocouple temperature sensor; 4-a sensor clamp; 5-outer cylinder; 6-a battery; 7-a first cushion; 71-cavity groove; 8-a second cushion; 9-chamber protecting ring; 91-mounting a screw hole; 10-an inverted switch; 11-an epoxy sealant layer; 12-circuit module.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the combination or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. In addition, in the description process of the embodiment of the present invention, the position relationships of the devices such as "up", "down", "front", "back", "left", "right" in all the drawings all use fig. 1 as a standard.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The present invention will be further explained with reference to the accompanying drawings:
referring to fig. 1, fig. 2 and fig. 5, the present invention provides the following technical solutions: a device for measuring temperature and pressure of an explosion field transient flow field comprises a front end cover 1, a graphene pressure sensor 2, a thermocouple temperature sensor 3, an outer barrel 5, a bore protection ring 9, an inverted switch 10 and a circuit module 12, wherein the upper surface of the front end cover 1 is provided with mounting holes in an annular array, the front end cover 1 is mounted in a explosive chamber at the bottom of a shell through the mounting holes, the bottom of the front end cover 1 is screwed with a sensor clamp 4 through threads, the graphene pressure sensor 2 and the thermocouple temperature sensor 3 are mounted inside the sensor clamp 4, fixing holes matched with the graphene pressure sensor 2 and the thermocouple temperature sensor 3 are further formed inside the sensor clamp 4 so as to facilitate mounting of the graphene pressure sensor 2 and the thermocouple temperature sensor 3, the bottom inside the sensor clamp 4 is clamped with a second cushion 8, and the first cushion 7 is clamped inside the second cushion 8, the first buffer cushion 7 is internally provided with a cavity 71, the second buffer cushion 8 and the first buffer cushion 7 have the same structure, as shown in fig. 5, the second buffer cushion 8, the first buffer cushion 7 and the sensor clamp 4 are all made of foamed aluminum for high overload buffering, the foamed aluminum is a potential impact buffer material, a buffer made of the foamed aluminum is a typical energy absorption device and is widely applied to automobile bumpers, spacecraft landing gear, elevator safety cushions, instrument packages and the like, the two sides of the interior of the cavity 71 are symmetrically provided with epoxy resin sealing layers 11, the interior of the cavity 71 is sequentially provided with an inverted switch 10, a circuit module 12 and a battery 6 from left to right, the epoxy resin sealing layers 11, the first buffer cushion 7 and the second buffer cushion 8 seal the inverted switch 10, the circuit module 12 and the battery 6, the outer cylinder 5 is sleeved outside the sensor clamp 4, the front end cover 1 and the outer cylinder 5 are made of ultra-high strength maraging steel, the yield strength can reach 1000MPa after heat treatment, and the front end cover, the front end cover and the outer cylinder are enough to protect a sensor, a circuit module, a battery and the like from being damaged in a high-temperature and high-pressure environment. The assembly is carried out by screw threads, the requirements of high-strength impact and high temperature in an explosion field can be met through theoretical calculation, and the bottom of the outer barrel 5 is also screwed with a chamber protection ring 9;
in the structure, the graphene pressure sensor 2 is made of graphene materials and is mainly used for detecting the pressure of an explosion field of the cannonball, wherein the graphene is a two-dimensional carbon nano material with hexagonal honeycomb lattices formed by carbon atoms in sp2 hybridized orbits, has excellent conductivity and optical performance, is one of the currently known materials with the highest strength, has good toughness and can be bent, compared with semiconductor high-temperature pressure sensors such as silicon on sapphire, silicon on insulator and silicon carbide, the temperature sensitivity of the pressure sensor is greatly improved, the graphene film is used as a conductive body, so that the conductivity of the pressure sensor and the mechanical strength of the pressure sensor are greatly increased, and when the pressure sensor bears the pressure, the pressure sensor can be effectively prevented from being extruded and damaged by the pressure;
the thermocouple temperature sensor 3 adopts a tungsten-rhenium thermocouple and is mainly used for detecting the temperature of the shell explosion field, the measurable temperature of the thermocouple temperature sensor reaches 2800 ℃, and the requirement of measuring the temperature of the explosion field is met;
in addition, the battery 6 adopts a chargeable polymer lithium ion battery with a low-temperature formula to provide a power supply, the nominal voltage is 3.6V, the battery capacity is 45mAh under the normal-temperature and high-temperature environments, and the battery capacity is 30mAh under the environment of minus 40 ℃, so that the device can normally work under the three temperature environments of normal temperature, high temperature and low temperature, and the heat preservation requirement is met;
meanwhile, as shown in fig. 2, the total number of the graphene pressure sensors 2 is nineteen, and the graphene pressure sensors are arranged in an array shape at fixed intervals, in the embodiment, the number of the graphene pressure sensors is 1, 3, 6 and 9 respectively when the graphene pressure sensors are distributed from inside to outside, meanwhile, the number of the thermocouple temperature sensors 3 is also nineteen, and the distribution of the thermocouple temperature sensors 3 is similar to that of the graphene pressure sensors 2. Thermal interference in a transient flow field can cause the change of environmental temperature to cause the change of parameters of components in a sensor circuit, and the electrical and magnetic interference can interfere the sensor through the circuit and a magnetic field, so a certain distance is reserved between the thermocouple temperature sensor 3 and the graphene pressure sensor 2, a shielding box is made of metal materials with good conductivity at an installation hole, an electromagnetic shielding layer is grounded in the circuit, and anti-interference measures such as twisted-pair wires, shielding cables and signal line filtering are adopted in signal transmission to ensure that signals cannot interfere.
Referring to fig. 3, in combination with the above structure, preferably, the graphene pressure sensor 2 includes a package housing, the package housing has a hollow installation interlayer inside, and a pressure sensing device and a signal processing unit are disposed inside the hollow installation interlayer, and the signal processing unit transmits a signal to the circuit module 12;
the outer part of the lower half section of the graphene pressure sensor 2 is provided with a mounting thread 21, and the mounting thread 21 is matched with a mounting hole groove formed in the sensor clamp 4;
specifically, the encapsulation shell of the graphene pressure sensor 2 is made of ultra-high strength martensitic stainless steel, and protects the internal pressure sensing module and the signal transmission line.
Referring to fig. 1, in combination with the above structure, preferably, the circuit module 12 is composed of a charge amplifier, a transient waveform recorder, a high-frequency crystal oscillator with an infrared interface on a panel, and a power supply controller, and mainly completes the functions of conditioning, sampling storage, data communication and the like of the output signal of the sensor;
the circuit module 12 is controlled by the power supply controller and the reversing switch 10, and meanwhile, the reversing switch 10 needs to be continuously reversed for a set time to be powered on so as to avoid the situation of power-on error;
the circuit module 12 proposed in the structure is a core component of the device, and is encapsulated by an epoxy resin sealing layer 11 by adopting a vacuum encapsulation process, so that the circuit module is prevented from being broken due to elastic-plastic deformation of an encapsulating material under the action of high impact overload;
in addition, the inverted switch 10 provided in the structure adopts a micro-accelerometer inverted switch, which is a key component for realizing power supply control of the voltage meter, and because the device is in a micro-power consumption state when being insulated together with ammunition according to ammunition safety regulations, the ammunition is only allowed to be horizontally placed or the front end of a bullet is upwards placed in a storage, insulation and transportation state, the situation that the voltage meter is electrified by mistake can be avoided through the inverted switch 10.
Referring to fig. 4, in combination with the above structure, preferably, the upper surface of the bore protection ring 9 is provided with mounting screw holes 91 distributed in an annular array, the outer portion of the bore protection ring 9 is further provided with threads, and the bore protection ring 9 can be mounted inside the shell through the mounting screw holes 91 and the threads;
specifically, the bore protection ring 9 is made of ultra-high strength maraging steel, the yield strength after heat treatment can reach 1000MPa, and the bore protection ring 9 is used for protecting the whole device when the device detects the parameters of the shell explosion field.
The utility model discloses a theory of operation and use flow: when the explosive explodes in the bore, pressure and temperature change, and the pressure signal that produces passes through graphite alkene pressure sensor 2, and temperature signal transmits circuit module 12 through thermocouple temperature sensor 3 and carries out acquisition processing, because circuit module 12 adopts the vacuum embedment technology, encapsulates with epoxy sealing layer 11 for unlikely breaking because of encapsulating material elastoplastic deformation under the high impact overload effect, thereby the normal work of guarantee device.
It is supplementary to explain that the device can adjust the number of the sensors according to the size of the cannonball medicine chamber, and the number is not necessarily limited in the embodiment, so as to achieve the aim of multi-point measurement. In other embodiments, some of the structures are cylindrical, but may be modified accordingly during implementation.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example" or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides an explosion field transient flow field temperature and pressure measurement device which characterized in that: the electric gun shell comprises a front end cover (1), a graphene pressure sensor (2), a thermocouple temperature sensor (3), an outer barrel (5), a bore protection ring (9), an inverted switch (10) and a circuit module (12), wherein an installation hole in an annular array is formed in the upper surface of the front end cover (1), the front end cover (1) is installed in a explosive chamber at the bottom of a shell through the installation hole, the bottom of the front end cover (1) is connected with a sensor clamp (4) through a thread in a threaded manner, the graphene pressure sensor (2) and the thermocouple temperature sensor (3) are installed inside the sensor clamp (4), a second cushion pad (8) is clamped at the bottom of the sensor clamp (4), a first cushion pad (7) is clamped inside the second cushion pad (8), a cavity groove (71) is formed inside the first cushion pad (7), and epoxy resin sealing layers (11) are symmetrically arranged on two sides of the cavity groove (71), simultaneously the inside of chamber groove (71) still installs inversion switch (10), circuit module (12) and battery (6) from left to right in proper order, epoxy sealing layer (11), first blotter (7) and second blotter (8) are sealed inversion switch (10), circuit module (12) and battery (6), urceolus (5) cup joint in the outside of sensor anchor clamps (4), and the bottom of urceolus (5) still spiro union have a protection thorax ring (9).
2. The explosive field transient flow field temperature and pressure measuring device according to claim 1, wherein: graphene pressure sensor (2) is including encapsulating the shell, the inside of encapsulating the shell is the cavity installation intermediate layer, and the interior of cavity installation intermediate layer is provided with pressure sensing device and signal processing unit, signal processing unit is to circuit module (12) signal transmission.
3. The explosive field transient flow field temperature and pressure measuring device according to claim 1, wherein: the circuit module (12) is composed of a charge amplifier, a transient waveform recorder, an infrared interface high-frequency crystal oscillator and a power supply controller, and mainly completes the functions of conditioning, sampling storage, data communication and the like of output signals of the sensor.
4. The device for measuring the temperature and the pressure of the transient flow field of the explosive field according to claim 3, wherein: the circuit module (12) is controlled by a power supply controller and an inversion switch (10), and meanwhile, the inversion switch (10) is powered on only after continuously inverting for a set time so as to avoid the situation of power-on error, and the time can be automatically adjusted.
5. The explosive field transient flow field temperature and pressure measuring device according to claim 1, wherein: the outer portion of the lower half section of the graphene pressure sensor (2) is provided with a mounting thread (21), and the mounting thread (21) is matched with a mounting hole groove formed in the sensor clamp (4).
6. The explosive field transient flow field temperature and pressure measuring device according to claim 1, wherein: the upper surface of protecting thorax ring (9) is seted up and is installation screw (91) that annular array distributes, and protects the outside of thorax ring (9) and still be equipped with the screw thread, protect thorax ring (9) and pass through installation screw (91) and screw thread mountable inside the shell.
7. The explosive field transient flow field temperature and pressure measuring device according to claim 1, wherein: the battery (6) adopts a chargeable polymer lithium ion battery with a low-temperature formula to provide a power supply, the nominal voltage is 3.6V, the battery capacity is 45mAh under normal temperature and high temperature environment, and the battery capacity is 30mAh under the environment of minus 40 ℃.
8. The explosive field transient flow field temperature and pressure measuring device according to claim 1, wherein: the second buffer pad (8) and the first buffer pad (7) are identical in structure, and the second buffer pad (8) and the first buffer pad (7) are both made of foamed aluminum materials.
9. The explosive field transient flow field temperature and pressure measuring device according to claim 1, wherein: the sensor clamp (4) is internally provided with fixing holes matched with the graphene pressure sensor (2) and the thermocouple temperature sensor (3), so that the graphene pressure sensor (2) and the thermocouple temperature sensor (3) can be conveniently installed.
10. The explosive field transient flow field temperature and pressure measuring device according to claim 1, wherein: the front end cover (1), the outer barrel (5) and the bore protection ring (9) are all made of ultra-high strength maraging steel, and the yield strength can reach 1000MPa after heat treatment, so that the graphene pressure sensor (2), the thermocouple temperature sensor (3), the battery (6), the circuit module (12) and the like are protected from being damaged in a high-temperature and high-pressure environment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921541160.1U CN211013351U (en) | 2019-09-17 | 2019-09-17 | Device for measuring temperature and pressure of transient flow field of explosion field |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921541160.1U CN211013351U (en) | 2019-09-17 | 2019-09-17 | Device for measuring temperature and pressure of transient flow field of explosion field |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110567637A (en) * | 2019-09-17 | 2019-12-13 | 中北大学 | device for measuring temperature and pressure of transient flow field of explosion field |
| CN116007793A (en) * | 2022-11-17 | 2023-04-25 | 中国人民解放军国防科技大学 | Transient thermal dose measuring device and method based on mercury thermometer |
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2019
- 2019-09-17 CN CN201921541160.1U patent/CN211013351U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110567637A (en) * | 2019-09-17 | 2019-12-13 | 中北大学 | device for measuring temperature and pressure of transient flow field of explosion field |
| CN116007793A (en) * | 2022-11-17 | 2023-04-25 | 中国人民解放军国防科技大学 | Transient thermal dose measuring device and method based on mercury thermometer |
| CN116007793B (en) * | 2022-11-17 | 2024-02-06 | 中国人民解放军国防科技大学 | Transient thermal dose measuring device and method based on mercury thermometer |
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