CN109683205B - Aerial detection device and ground ejection system - Google Patents
Aerial detection device and ground ejection system Download PDFInfo
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- CN109683205B CN109683205B CN201811623440.7A CN201811623440A CN109683205B CN 109683205 B CN109683205 B CN 109683205B CN 201811623440 A CN201811623440 A CN 201811623440A CN 109683205 B CN109683205 B CN 109683205B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
- G01V8/20—Detecting, e.g. by using light barriers using multiple transmitters or receivers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41F—APPARATUS FOR LAUNCHING PROJECTILES OR MISSILES FROM BARRELS, e.g. CANNONS; LAUNCHERS FOR ROCKETS OR TORPEDOES; HARPOON GUNS
- F41F1/00—Launching apparatus for projecting projectiles or missiles from barrels, e.g. cannons; Harpoon guns
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Abstract
The invention discloses an aerial detection device and a ground ejection system, which comprise a spherical shell consisting of an upper hemispherical shell and a lower hemispherical shell, wherein the spherical shell is provided with a plurality of detector accommodating holes, the top of the upper hemispherical shell is provided with parachute accommodating grooves along the circumference, an infrared detection system, a motion sensing system, a master control system and a power supply system are arranged in the spherical shell, the infrared detection system, the motion sensing system and the power supply system are all connected with the master control system, the infrared detection system comprises a plurality of infrared detectors, and the infrared detectors are fixed on the spherical shell through the detector accommodating holes. The detection device is lifted off through the ejection device, and a plurality of groups of infrared detection devices are used for joint detection in the air, so that the method ingeniously overcomes the defects of barrier barriers during ground detection, has high lifting speed, small noise and small volume, can be carried about, is suitable for emergencies or emergency situations, and particularly has good application value in the fields of wild animal protection and monitoring, flood rescue and relief, earthquake relief, individual combat, criminal investigation and the like.
Description
Technical Field
The invention relates to the technical field of aerial detection, in particular to an aerial detection device and a ground ejection system based on the aerial detection device.
Background
At present, the traditional detection device mainly obtains the position information of a target object from the ground through an ultralow frequency electric wave or electromagnetic induction technology, wherein the ultralow frequency electric wave is mainly used for a life detector, the electromagnetic induction is mainly used for a metal detector, but the detection range of the ground detection device is limited and is easily blocked by an obstacle; carry on infrared sensing detection device or airborne radar from aerial through unmanned aerial vehicle and acquire target object positional information, but unmanned aerial vehicle rises to the air the speed slower, and the timeliness is poor, and produces huge noise disturbing target object easily.
The airborne radar has higher cost, is more biased to the military field and is not suitable for short-distance accurate position monitoring; the position information of the underwater target object is acquired from underwater through a sonar positioning technology, but the sound propagation speed is slow, the positioning position deviation is easily generated when the target object is in a motion state, and whether the target object is a living body cannot be detected. In addition, the devices involved in the three methods are large in size and difficult to carry and transport.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects of the prior art, the invention provides an aerial detection device which can solve the problems of poor ground obstacle avoidance capability, small detection range, poor timeliness, high noise, high cost and difficulty in carrying.
The technical scheme is as follows: the aerial detection device comprises a spherical shell consisting of an upper hemispherical shell and a lower hemispherical shell, wherein a plurality of detector accommodating holes are formed in the spherical shell, parachute accommodating grooves are formed in the top of the upper hemispherical shell along the circumference, an infrared detection system, a motion sensing system, a master control system and a power supply system are arranged in the spherical shell, the infrared detection system, the motion sensing system and the power supply system are all connected with the master control system, the infrared detection system comprises a plurality of infrared detectors, and the infrared detectors are fixed on the spherical shell through the detector accommodating holes.
Preferably, the infrared detection system further comprises an infrared signal memory and a first A/D acquisition circuit, and the infrared detector and the first A/D acquisition circuit are electrically connected with the infrared signal memory.
Preferably, install first baffle, second baffle, third baffle and fourth baffle along the circumference from the bottom up in proper order in the spherical shell, infrared signal memory and first AD acquisition circuit are fixed on the first baffle, major control system and power supply system install on the second baffle, motion sensing system installs on third baffle and the fourth baffle.
Preferably, the motion sensing system comprises an electric control parachute, an electric control motor, an inertial sensor and a second A/D acquisition circuit, the electric control motor and the electric control parachute are arranged on the fourth partition plate and connected, and the upper end of the electric control parachute is arranged outside the spherical shell through the parachute accommodating groove; the inertial sensor with second AD acquisition circuit arranges in on the third baffle, automatically controlled motor drive the opening/retrieving of automatically controlled parachute, second AD acquisition circuit with inertial sensor links to each other, inertial sensor is responsible for collecting detection device self motion state, after detecting the back master control system signals, automatically controlled motor with master control system electric connection.
Preferably, the master control system comprises a first master controller and a first WIFI module, the first WIFI module is responsible for returning information collected by the infrared detector and the inertial sensor, and the first WIFI module is electrically connected with the first master controller.
Preferably, the electric control motor is a stepping motor.
Preferably, the plurality of infrared detectors comprise a plurality of infrared detectors A which are arranged along the circumference of the spherical shell in a layered manner and an infrared detector B which is arranged at the lower vertex of the spherical shell, the infrared detectors A are M layers except the upper vertex and the lower vertex of the spherical shell, and N infrared detectors are arranged on each layer, wherein M is more than or equal to 3 and less than or equal to 6, and N is more than or equal to 9 and less than or equal to 15.
A ground ejection system comprises the aerial detection device and an ejector, wherein the ejector comprises an ejection barrel matched with a ball body of the aerial detection device, a triggering mechanism, a communication module, an unlocking module and a power module, the communication device is used for collecting and sending signals, the power module is used for supplying energy, the aerial detection device is arranged in the ejection barrel, the unlocking module is used for controlling whether the aerial detection device is launched or not, and when the unlocking module is locked, the triggering mechanism does not work, and the aerial detection device does not launch; when the unlocking module is unlocked, the trigger mechanism is ignited, and the aerial detection device is launched out from the ejection gun barrel.
Preferably, the unlocking module comprises a photoelectric sensor, a second main controller, a second WIFI module and a safety device, and the photoelectric sensor, the second WIFI module and the safety device are electrically connected with the second main controller; the photoelectric sensor is fixed at the outlet of the ejection gun barrel and used for detecting whether foreign matters exist in the fixed range of the outlet of the gun barrel, the second main controller acquires signals of whether foreign matters exist and detected by the photoelectric sensor, controls the safety device to be locked/unlocked and sends the signals of whether foreign matters exist or not through the second WIFI module.
Preferably, the shooting device further comprises a driving motor, the driving motor is connected with the second main controller, the second main controller drives the driving motor according to the received angle data, and the driving motor adjusts the shooting barrel to a preset angle.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages: 1. the aerial detection device quickly lifts off the sensor in a short time in an ejection mode, can be used for emergencies, avoids influencing a target object and simultaneously realizes accurate ground target positioning; 2. the aerial detection device has small volume and can be carried about; 3. the aerial detection device avoids the barrier of the obstacle during ground ranging through aerial ranging; 4. the aerial detection device is simple in structure, simple to operate, convenient to recover and capable of being used for multiple times, and can be applied to fields such as post-earthquake search and rescue, wild animal protection, criminal investigation, flood rescue and the like.
Drawings
FIG. 1 is a schematic diagram of the general structure of an aerial detection device according to the present invention;
FIG. 2 is a schematic view of the internal structure of the aerial detection device 1 according to the present invention;
FIG. 3 is a schematic diagram of the internal structure of the aerial detection device of the present invention shown in FIG. 2;
FIG. 4 is a schematic diagram of an infrared detection system according to the present invention;
FIG. 5 is a flow chart of the operation of the aerial detection unit of the present invention;
fig. 6 is a schematic structural diagram of a ground ejection system according to the present invention;
fig. 7 is a flow chart of a method of operating the ground ejection system of the present invention;
fig. 8 is a simulation block diagram of the ground ejection system according to the present invention;
FIG. 9 is a diagram showing the relationship between the air resistance F and the centroid velocity V of the aerial detection device when the aerial detection device is ejected;
FIG. 10 is a graph of the relationship between the height of the center of mass and time as the aerial detection device of the present invention is launched;
FIG. 11 is a graph of X-direction displacement versus time for an airborne detection apparatus according to the present invention;
FIG. 12 is a Y-X relationship diagram of the vertical and horizontal components of the center of mass of the aerial detection device of the present invention;
fig. 13 is a diagram of the relationship between the mass center speed and the time of the aerial detection device according to the invention.
The figure includes: an aerial detection device 100, a spherical shell 101, a detector accommodating hole 102, a parachute accommodating groove 103, a first partition plate 104, a second partition plate 105, a third partition plate 106 and a fourth partition plate 107, an infrared detection system 1, an infrared detector 11, an infrared detector A111, an infrared detector B112, an infrared signal memory 12, a first A/D acquisition circuit 13, a motion sensing system 2, an electronic control parachute 21, an electronic control motor 22, an inertial sensor 23, a second A/D acquisition circuit 24, a main control system 3, a first main controller 31, a first WIFI module 32, a sequential circuit 33, a D/A conversion circuit 34, a power supply system 4, a power supply circuit 41 and a protection circuit 42,
the device comprises an ejector 200, an ejection barrel 201, a trigger mechanism 202, a trigger 2021, a trigger 2022, an unlocking module 203, a second WIFI module 2031, a second main controller 2032, a safety device 2033, a photoelectric sensor 2034, a communication module 204, a third A/D acquisition circuit 2041, a second D/A conversion circuit 2042, a power supply module 205 and a driving motor 206.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. It should be noted that the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in FIG. 1, the aerial detection device 100 of the present invention comprises a spherical shell 101 composed of an upper hemispherical shell and a lower hemispherical shell, and the sphere has a small volume, can be carried about, and can be designed to be 15 cm. The device 200 shell adopts bilayer structure, at first mainly adopts the carbon-fibre composite that tensile strength is high, density is little, corrosion resistance, durability are good, wraps up the natural rubber or the chloroprene rubber that stickness is high, elasticity is high in its outsourcing, can play effectual vibrations isolation, the internal circuit of protection aerial detection device.
Set up a plurality of detectors on the spherical shell 101 and accomodate hole 102 and set up the parachute along the circumference and accomodate groove 103 at the top of last hemisphere shell, set up infrared detection system 1, motion sensing system 2, major control system 3 and power supply system 4 in the spherical shell 101, infrared detection system 1, motion sensing system 2 and power supply system 4 all with major control system 3 links to each other, infrared detection system 1 includes a plurality of infrared detector 11, infrared detector 11 passes through detector is accomodate hole 102 and is fixed on the spherical shell 101.
As shown in fig. 2 and 3, a first partition plate 104, a second partition plate 105, a third partition plate 106 and a fourth partition plate 107 are sequentially installed in the spherical shell 101 from bottom to top along the circumference, the fourth partition plate 107 is used for placing an electronic control parachute 21 in the motion sensing system 2 and an electronic control motor 22 for driving the electronic control parachute 21 to open and recover, the upper end of the electronic control parachute 21 penetrates through the parachute storage groove 103 and is placed outside the spherical shell 1, in one embodiment, the electronic control motor 22 is a stepping motor, the stepping motor can control the rotating speed and the stopping position of the motor through pulse signals, the electronic control parachute 21 has a risk of being stuck in an aerial detection device, and the parachute can be effectively taken out and unfolded by adjusting the state of the stepping motor.
The third diaphragm 106 houses the inertial sensor 23 in the motion sensing system 2 and the second a/D acquisition circuit 24 connected to the inertial sensor 23. The inertial sensor 23 is responsible for collecting the motion state of the detection device itself, and includes: the speed, the acceleration, the angular acceleration, the spatial rotation angle and the like are detected and then sent to the master control system 3. When the inertial sensor 23 detects that the aerial detection device 100 rises to the highest point (when the vertical speed is reduced to 0), the main control system 3 drives the electric control motor 22 at the top end of the detection device 100 to open the electric control parachute 21, and the first WIFI module 32 continuously transmits back data in the process.
Preferably, the inertial sensor 23 parameters are as follows: the model is as follows: SI-11.s1.c-30, sensitivity 10 hz <0.0015 °, repeated measurement deviation ± 0.0030 °, temperature coefficient deviation ± 0.0025 °/K, output data rate: 1600 hertz, bandwidth: 400 Hz, digital interface: SPI, working temperature-40 to 85 degrees.
The second partition 105 is used for placing related components of the main control system 3 and related components of the power supply system 4, and specifically, the first main controller 31, the first WIFI module 32 for information intercommunication between the aerial detection device and the ground terminal, the sequential circuit 33, the D/a conversion circuit 34, the power supply circuit 41 for providing power supply, and the protection circuit 42 connected with the power supply circuit 41 are placed, the D/a conversion circuit is connected with the first WIFI module 32, and the sequential circuit 33 and the power supply circuit 41 are connected with the first main controller 31.
The first WIFI module 32 includes a sub-module WIFI RFID module, and the WIFI RFID module is responsible for returning information collected by each sensor, and is also responsible for returning the position information of the detection device to the ground terminal. The Wifi RFID module is a submodule of the Wifi module, and the specific relative position of the detection device is mainly determined through a WIFI RFID technology. The WIFI main module is mainly responsible for transmission work of all data, and the data comprise relative positions of the detection devices acquired through a WIFI RFID technology. The system carries a high-power wifi module with the model number of SKW77, the farthest communication distance is 1.5 kilometers, signals of the module are not attenuated in a short-distance communication range, and the condition that the signals cannot be received does not exist.
As shown in fig. 4, the first partition 104 is used to place the infrared signal storage 12 in the infrared detection system 1 and the first a/D acquisition circuit 13 connected to the infrared signal storage 12, in one embodiment, the infrared signal storage 11 is preferably an uncooled focal plane infrared signal storage, and all the infrared detectors 11 are electrically connected to the infrared signal storage 12. The infrared detector 11 is connected with the uncooled focal plane infrared signal memory at the lowest layer through a data line arranged along the inner wall of the detection device.
Since the spherical shell of the aerial detection device 100 is made of carbon fiber composite material with the thickness of 2.5cm, the density of the material is larger than the average density of internal electronic elements, the weight of the shell accounts for more than 90% of the weight of the whole detection device, the center of mass of the aerial detection device is basically located at the center of a sphere, and the influence of the mass distribution of the electronic elements in the aerial detection device on the balance of the device is negligible.
The data interfaces of the first master controller 31 are all Serial Peripheral Interfaces (SPI), wherein the first master controller 31 and the sequential circuit 33 are connected by a Serial Clock Line (SCLK), and all the other modules are connected by a data line MISO.
The plurality of infrared detectors 11 on the outer surface of the spherical shell 101 comprise a plurality of infrared detectors a111 arranged in the detector accommodating holes 102 on the spherical shell in a layered manner along the circumference of the spherical shell and an infrared detector B112 arranged in a detector accommodating hole (not shown in the figure) arranged at the lower vertex of the spherical shell, preferably, the infrared detectors 11 are uncooled infrared focal plane sensors which are responsible for collecting an infrared thermal imaging image and a depth image of an external environment; the dry infrared detectors A111 are M layers except the upper vertex and the lower vertex of the spherical shell, and N infrared detectors are arranged on each layer, wherein M is more than or equal to 3 and less than or equal to 6, and N is more than or equal to 9 and less than or equal to 15. The upper vertex of the spherical shell is not provided with the infrared detector because the electric control parachute 21 needs to be placed.
In the present embodiment, there are 61 infrared detectors 11, wherein the infrared detectors a111 of the detection device are distributed in five layers, each layer has 12 infrared detectors, and there are 60 infrared detectors in total, and there is one infrared detector B112 at the bottom. The detection space angle of each infrared detector is 45 degrees, the number of the infrared detectors can be set to 8 within a space range of 360 degrees, and the number of the infrared detectors can be set to 4 within a space range of 180 degrees. In order to enhance the signal intensity of infrared rays in a detection angle, the space angle of two adjacent sensors is set to be 30 degrees, on one hand, the detection range can be covered in all aspects, and on the other hand, data acquisition can be achieved without omission. Through aerial range finding, obstacle barrier when avoiding ground range finding.
The infrared detector parameters were as follows: the model is as follows: LA3110(384 × 28817 μm) uncooled infrared movement assembly; noise equivalent temperature difference: at the temperature of less than or equal to 60mK @25 ℃, and f/1.0 (optional less than or equal to 50 mK); frame frequency: 50 Hz; working voltage: 4V; power consumption: less than or equal to 1.7W; working temperature: minus 40 ℃ to plus 60 ℃.
As shown in fig. 5, which is a flow chart of the working principle of each module in the aerial detection device, when the first main controller operates, the inertial sensor continuously captures the motion state of the detection device; firstly, when the inertial sensor detects that the detection device rises to the highest point, the electric control motor drives the electric control parachute to release; the infrared sensor continuously captures the thermal imaging image and the depth image, the sub-module WIFI RFID of the first WIFI module continuously captures the relative position of the detection device, when the first WIFI module continuously returns data to the ground terminal, whether the detection device falls to the ground or not is detected, when the detection is finished and the detection device falls to the ground, all sensors are closed, and the rear WIFI RFID module continuously returns the relative position of the detection device.
As shown in fig. 6, the present invention further discloses a ground ejection system, which can be directly fixed on the ground, and comprises the above-mentioned aerial detection device 100 and an ejector 200, wherein the ejector 200 comprises an ejection barrel 201 matched with the sphere of the aerial detection device 100, and the aerial detection device 100 is placed in the ejection barrel 201.
The catapult 200 comprises a catapult barrel 201 matched with the aerial detection device sphere, a triggering mechanism 202, a communication module 204, an unlocking module 203 and a power supply module 205, wherein the communication module 204 is used for acquiring and transmitting and receiving signals, the power supply module 205 is used for supplying energy, the aerial detection device 100 is arranged in the catapult barrel 201, the unlocking module 203 is used for controlling whether the aerial detection device 100 is launched or not, and when the unlocking module 203 is locked, the triggering mechanism 202 does not work, and the aerial detection device 100 does not launch; when the unlocking module 203 is unlocked, the trigger mechanism 202 can be ignited, and the aerial detection device 100 is launched from the ejection barrel 101.
The trigger mechanism 202 includes a trigger 2021 and a trigger 2022, both disposed at the bottom of the catapult barrel 201, the trigger 2021 is a gunpowder-triggered fuse, and after the trigger 2022 is pulled, the fuse can be ignited to generate explosion in the catapult barrel 201, so that the aerial detection device 100 flies out.
The unlocking module 203 includes a photoelectric sensor 2034, a second main controller 2032, a second WIFI module 2031 and a safety device 2033, the photoelectric sensor 2034, the second WIFI module 2031 and the safety device 2033 are electrically connected to the second main controller 2032.
The photoelectric sensor 2034 is ring-shaped and is nested on the outer wall of the mouth of the catapult gun barrel 201 to detect whether foreign matter exists in the fixed range of the outlet of the gun barrel, the photoelectric sensor 2034 can monitor a space angle of 45 degrees and a distance of 1m, the third a/D acquisition circuit 2041 converts an analog signal detected by the photoelectric sensor 2034 into digital signals 1 and 0, wherein when the signal is 1, the signal represents that no foreign matter exists around the emission mouth of the ground catapult device, when the signal is 0, the signal represents that foreign matter exists around the emission mouth of the ground catapult device, and transmits the converted digital signal to the second main controller 2032, if the second main controller 2032 receives the digital signal 1, the ground catapult device is unlocked, and if the second main controller 2032 receives the digital signal 0, the unlocking device is in a locked state.
The second main controller 2032 in the ejection device is configured to store a feedback signal without a foreign object, and send the signal to the ground terminal through the second WIFI module 2031. Meanwhile, the second main controller 2032 drives the driving motor 206 and the ejection device to operate, and the driving motor 206 is preferably a stepping motor. The state information of the device obtained after being processed by the second main controller 2032 is converted into an analog signal by the second D/a conversion circuit 2042, and the analog signal is transmitted back to the ground terminal by the second WIFI module 2031. Therefore, the sensor can be quickly lifted off in a short time in an ejection mode, and the sensor can be used for emergency events, so that accurate ground target positioning is realized while the target object is prevented from being influenced.
The data interface connected to the second host controller 2032 is SPI (Serial peripheral interface), and all data lines use MISO data lines.
As shown in fig. 6, a safety device 2033 is located at the periphery of the trigger 2022 of the ground ejection device, the device 2033 is used for locking or unlocking the trigger 2022, the device 2033 can clamp the trigger 2022 by a clamp when in a locked state, so that an operator cannot pull the trigger 2022 to ignite a fuse, the safety device 2033 is controlled to be unlocked or locked by the second main controller 2032, the second main controller 2032 receives a signal sent by the photoelectric sensor 2034 and then performs data processing, and sends an instruction to the safety device 2033 through a MISO data line, and when the photoelectric sensor 2034 detects that no foreign object exists within 1m of the periphery of the emission opening of the emission device, the locked state is automatically released.
Fig. 7 shows a flow chart of the ejector.
Firstly, the ejector 200 is fixed on the ground, it is confirmed that the emission environment of the detection device is good, the photoelectric sensor 2034 detects whether foreign matters exist within a range of 1m of an emission port of the ground ejection system, the third a/D acquisition circuit 2041 converts an analog signal detected by the photoelectric sensor 2034 into digital signals 1 and 0, wherein when the signal is 1, the signal represents that no foreign matters exist around the emission port of the ground ejection system, when the signal is 0, the signal represents that foreign matters exist around the emission port of the ground ejection system, and transmits the converted digital signal to the second main controller 2032, if the second main controller 2032 receives the digital signal 1, the safety 2033 is unlocked, and if the second main controller 2032 receives the digital signal 0, the safety 2033 is locked.
Secondly, the ground terminal sends the ejection angle signal to the second main controller 2032 through the second WIFI module 2031, and the second main controller 2032 drives the stepping motor 206 according to the received angle data to rotate the ejection barrel 201 to a set angle.
Finally, the ground terminal sends the ejection confirmation signal to the second main controller 2032 through the second WIFI module 2031, and launches the aerial detection device.
The first main controller and the second main controller are both MCU (micro controller unit) with the model of STM32F103C8T6, the first WIFI module and the second WIFI module are mainly responsible for transmission of all data, and the data comprise relative positions of detection devices acquired through WIFI RFID technology. The system carries a high-power wifi module with the model number of SKW77, and the farthest communication distance is 1.5 kilometers.
The following discusses the motion model of the aerial detection device, and in the present invention, the motion model of the aerial detection device 100 is as follows:
when the air resistance is in direct proportion to the square of the speed, a motion trail equation of the air detection device can be written by a kinematic formula and a Newton's second law, and the following equation is shown in an O-xy coordinate in the rising process:
the x direction:
the y direction:
will be replaced by
Substituted type
Is provided with
Separate the variables and integrate them simultaneously, and apply initial boundary conditions to the equations
Continuing to adopt separation variable method and using initial condition x-t＝00, available
Will be replaced by
In the formula (2) is
Can obtain the product
By substitution
Continue to separate the variable integrals and add the initial condition y tint t＝00, available
In the above formula when vyWhen y is 0, y takes a maximum value of ymax，t1At the moment when the air detection device reaches the highest point, the descending process will be
Substituting the band into the formula (3), and adding initial conditions by adopting a separation variable method
Can obtain the product
The same can be obtained:
wherein
Wherein x is1Is the horizontal displacement, x, of the aerial detection device during the ascent process2Is the descent of the parachuteHorizontal displacement of the process, y vertical displacement of the airborne detection device during ascent, vx1Is the velocity, v, in the horizontal direction of the airborne probe during ascentx2Is the velocity in the horizontal direction, v, of the parachute during descenty1Is the velocity, v, in the vertical direction of the airborne probe during ascenty2Is the velocity in the vertical direction of the descent of the parachute, CVIs the coefficient of resistance of an object in air, m1Is the mass of the aerial sounding device, m2Is the mass of the parachute, g is the acceleration of gravity, v0Is the initial velocity of the aerial detection device. k is a radical of1＝0.5ρ0S1C1，,ροIs the density of air, S1C is the maximum cross-sectional area of the aerial detection device, C1Is the air resistance coefficient of the aerial detection device; k is a radical of2＝0.5ρ0S2C2，S2Is the maximum cross-sectional area of the parachute, C2Is the air resistance coefficient of the parachute.
The specific embodiment of the motion simulation process of the aerial detection device is as follows:
the following is the detector motion process simulated by Adams software under the condition that the emergence angle is 45 degrees, namely the gun barrel is ejected to a set angle of 45 degrees:
(1) adams software is introduced into the model file, the position of the center of mass of the detection device is used as a coordinate origin, and the direction of the catapult is 45 degrees along the XY axis, as shown in FIG. 8.
Wherein the diameter of the aerial detection device 100 is 15cm, and the average density of the aerial detection device and the parachute is 1000kg/m3In the flying process of the detection device, the direction of the air resistance F is always opposite to the direction of the mass center speed of the detection device, and the direction of the mass center speed of the detection device is always changed along with the time. Therefore, when applying a force to the model, the air resistance needs to be applied by dividing the air resistance into two components in the positive axis direction and the negative axis direction, as shown in fig. 9.
Air resistance F ═ 0.5 rho V in flying process of detection device2SmCwThe direction is opposite to the direction of the mass center speed of the detection device; where ρ is∞Is the density of air, V∞For detecting the centroid velocity, S, of the devicem＝0.25πD2m is the maximum cross-sectional area of the detection device, and Cw is the air resistance coefficient. The air resistance coefficient of the detection device is 0.5, and the air resistance coefficient of the parachute is 1.4. Adding 9.8m/s of negative direction of Y axis in G direction of gravity into Adams2The resistance F to the detecting deviceX1，FY1Resistance F to the parachuteX2，FY2。
Considering the casting direction of 45 degrees, setting the initial speed VX＝28.7m/s，VY28.7 m/s. According to the formula of resistance F ═ 0.5 rho V2SmCWChecking data to obtain air density of 1.288Kg/m3, diameter of detecting device of 15cm, air resistance coefficient C of detecting deviceW0.5, parachute air resistance coefficient CW1.4, the total average density of the detector and parachute is 1000kg/m3The diameter of the Y axis of the parachute is 1.190m, the diameter of the X axis of the parachute is 0.2m, and the number of the infrared detectors is 61.
Selecting an icon in a Function column in Adams, and entering a Function editor; entering in a function editor text box:
the resistance of the detecting device
FX1＝0.5*1.288*(.shell.danwan_V**2)*(3.1415/4)*(0.15**2)*0.5*sin(atan(.shell.danwan_VX/(0-.shell.danwan_VY)))*IF(.shell.danwan_VY-0:0,0,-1)
FY1＝0.5*1.288*(.shell.danwan_V**2)*(3.1415/4)*(0.15**2)*0.5*cos(atan(.shell.danwan_VX/(0-.shell.danwan_VY)))*IF(.shell.danwan_VY-0:0,0,-1)
Resistance to parachute
FX2＝0.5*1.288*(.shell.danwan_V**2)*(3.1415/4)*(0.200**2)*1.4*sin(atan(.shell.danwan_VX/(0-.shell.danwan_VY)))*IF(.shell.danwan_VY-0:1,0,0)
FY2＝0.5*1.288*(.shell.danwan_V**2)*(3.1415/4)*(1.190**2)*1.4*cos(atan(.shell.danwan_VX/(0-.shell.danwan_VY)))*IF(.shell.danwan_VY-0:1,0,0)
The above is an Adams function editor resistance expression, in the Adams experiment of this embodiment, the name of the aerial detection device is danwan, shell is a geometric body, and in Adams, a part or a model is referred to,. shell.
Considering that the 45-degree oblique-shooting maximum height of the aerial detection device is 40m, the lift-off height of the aerial detection device depends on the charge of gunpowder in the ground ejection device, the fixed amount of gunpowder explosion can only generate a fixed impulse to push the aerial detection device, the emission impulse of the ground ejection device acting on the aerial detection device is a fixed value 71Ns, and the impulse can maximally oblique-shoot the aerial detection device to the 40m high altitude, and the calculation formula is as follows:
wherein, P is the impulse generated by the explosion of gunpowder, the impulse is 71Ns in the embodiment, theta is the included angle between the gun barrel of the ground ejection device and the ground, the oblique firing angle is 45 degrees in the embodiment, and m is1Is the mass of the aerial sounding device, m2Is the mass of the parachute, which in this example is 1.77kg in total mass.
In the simulation experiment of the embodiment, the names of danwan, CM _ position, x and danwan, CM _ position, y are used to represent displacement changes of the aerial detection device in x and y directions, and CM represents the center of mass. Fig. 12 shows the relationship between the height of the centroid (Length) of the detection device and the Time (Time), and fig. 13 shows the relationship between the X-direction displacement (. danwan. cm _ position. X) of the aerial detection device and the Time (Time).
Taking 21 points of the detection device X, Y direction movement process for quantitative description, the specific correspondence is as the following table 1:
the 21 points are 0.9 second in the time dimension as one step, the number of the collected points can be adjusted according to the size of the step, and can also be set as other steps according to specific requirements to carry out quantitative description. The meaning of describing these points is to describe the displacement change of the aerial detection device in the current relative position, i.e. in the x and y directions.
TABLE 1 Displacement Change of aerial sonde at Current relative position, i.e. in x and y directions
(2) Obtaining the current relative position coordinates of the aerial detection device, the depth map and the thermal imaging map of the periphery of the target object
The infrared detector is activated to enter a working state after the detection device leaves the ejector, the first main controller and the inertial sensor are in a continuous working state, the inertial sensor sends a signal to the first main controller after detecting external impact, and the first main controller controls the infrared detector to enter the working state.
(3) Ground terminal receiving sensor comprehensive data
Analog signals captured by the infrared detector and the inertial sensor are converted into digital signals through the second A/D acquisition circuit and input into the first main controller, the digital signals are converted into the analog signals through the D/A conversion circuit after the first main controller is processed, and the analog signals are sent to the ground terminal through the first WIFI module. And the ground terminal receives the infrared thermal imaging image and the depth map sent by the aerial detection device, the self motion attitude information of the detection device and the position information of the detection device.
The ground terminal is a mobile terminal and comprises communication equipment such as a mobile phone, a computer and an ipad, and the ground terminal specifically comprises:
the ground ejection system initialization module is used for setting relevant parameters of the ground ejection system, checking whether the external environment is suitable for ejection or not, and performing information interaction with the ground ejection system through a WIFI module in the ground terminal;
the target monitoring module is used for checking specific target information on a full time axis in a monitoring range after the aerial detection device is ejected, a user can traverse the whole work flow through a sliding bar, can expand a thermal imaging graph and a depth graph of a target after clicking the target, and is in information intercommunication with the aerial detection device through the first WIFI module;
and the state checking module of the aerial detection device is used for confirming the working state and the device loss condition of the aerial detection device so as to provide convenience for maintenance and repair, and the information intercommunication is carried out between the first WIFI module and the aerial detection device.
(4) The ground terminal carries out dynamic image synthesis and target object identification analysis and pushes target object information
After receiving the information sent by the aerial detection device, the ground terminal device synthesizes 61 images transmitted by each frame of the infrared detector into an HDR scene map in a UV map mode and identifies characteristic points in the infrared thermal imaging map through an image identification algorithm, wherein the point with the temperature higher than the surface temperature of organisms is about 30 ℃ in default, and the boundary between the target object and the external environment is distinguished through the characteristic points, so that the centroid position of the target object is calculated, and the relative position coordinate of the target object relative to the aerial detection device is obtained. And synthesizing the position coordinates of the target relative to the aerial detection device, wherein the position coordinates comprise two groups of vectors of distance, azimuth angle, pitch angle and the position coordinates of the aerial detection device relative to the user, and the position coordinates of the target relative to the user are calculated. And pushing the position coordinates of the target and the aerial detection device relative to the user by applying a target detection interface through the ground terminal.
The above-mentioned embodiments are only preferred embodiments of the present invention, and do not limit the technical scope of the present invention, so that the changes and modifications made by the claims and the specification of the present invention should fall within the scope of the present invention.
Claims (10)
1. The utility model provides an aerial detection device, includes the spherical shell that upper hemispherical shell and lower hemispherical shell constitute, its characterized in that, set up a plurality of detectors on the spherical shell and accomodate the hole and set up the parachute along the circumference and accomodate the groove at the top of upper hemispherical shell, arrange infrared detection system, motion sensing system, major control system and power supply system in the spherical shell, infrared detection system, motion sensing system and power supply system all with major control system links to each other, infrared detection system includes a plurality of infrared detector, infrared detector passes through the detector is accomodate the hole and is fixed on the spherical shell.
2. The aerial detection device of claim 1, wherein the infrared detection system further comprises an infrared signal memory and a first a/D acquisition circuit, the infrared detector and the first a/D acquisition circuit both being electrically connected to the infrared signal memory.
3. The aerial detection device of claim 2, wherein a first partition plate, a second partition plate, a third partition plate and a fourth partition plate are sequentially arranged in the spherical shell from bottom to top along the circumference, the infrared signal memory and the first A/D acquisition circuit are fixed on the first partition plate, the master control system and the power supply system are arranged on the second partition plate, and the motion sensing system is arranged on the third partition plate and the fourth partition plate.
4. The aerial detection device of claim 3, wherein the motion sensing system comprises an electrically controlled parachute, an electrically controlled motor, an inertial sensor and a second A/D acquisition circuit, the electrically controlled motor and the electrically controlled parachute are arranged on and connected with the fourth partition plate, and the upper end of the electrically controlled parachute is arranged outside the spherical shell through the parachute accommodating groove; the inertial sensor with second AD acquisition circuit arranges in on the third baffle, automatically controlled motor drive the opening/retrieving of automatically controlled parachute, second AD acquisition circuit with inertial sensor links to each other, inertial sensor is responsible for collecting detection device self motion state, after detecting the back master control system signals, automatically controlled motor with master control system electric connection.
5. The aerial detection device of claim 3, wherein the master control system comprises a first master controller and a first WIFI module, the first WIFI module is responsible for returning information collected by the infrared detector and the inertial sensor, and the first WIFI module is electrically connected with the first master controller.
6. The aerial detection device of claim 4, wherein the electrically controlled motor is a stepper motor.
7. The aerial detection device of claim 1, wherein the plurality of infrared detectors comprise a plurality of infrared detectors A arranged in layers along the circumference of the spherical shell and an infrared detector B arranged at the lower vertex of the spherical shell, the plurality of infrared detectors A are arranged in M layers except the upper vertex and the lower vertex of the spherical shell, and N infrared detectors are arranged in each layer, wherein M is greater than or equal to 3 and less than or equal to 6, and N is greater than or equal to 9 and less than or equal to 15.
8. A ground ejection system, comprising the aerial detection device of any one of claims 1 to 7 and an ejector, wherein the ejector comprises an ejection barrel matched with a sphere of the aerial detection device, a triggering mechanism, a communication module, an unlocking module and a power module, wherein the communication module is used for collecting and transmitting and receiving signals, the power module is used for supplying energy, the aerial detection device is arranged in the ejection barrel, the unlocking module is used for controlling whether the aerial detection device is launched or not, and when the unlocking module is locked, the triggering mechanism does not work, the aerial detection device does not launch; when the unlocking module is unlocked, the trigger mechanism is ignited, and the aerial detection device is launched out from the ejection gun barrel.
9. The ground ejection system of claim 8, wherein the unlocking module comprises a photosensor, a second main controller, a second WIFI module, and a safety device, the photosensor, the second WIFI module, and the safety device being electrically connected to the second main controller; the photoelectric sensor is fixed at the outlet of the ejection gun barrel and used for detecting whether foreign matters exist in the fixed range of the outlet of the gun barrel, the second main controller acquires signals of whether foreign matters exist and detected by the photoelectric sensor, controls the safety device to be locked/unlocked and sends the signals of whether foreign matters exist or not through the second WIFI module.
10. The ground ejection system of claim 9, further comprising a drive motor, wherein the drive motor is connected to the second master controller, the second master controller drives the drive motor according to the received angle data, and the drive motor adjusts the ejection barrel to a preset angle.
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| CN104329987B (en) * | 2014-11-24 | 2016-03-09 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of overhead infrared target simulator |
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