CN115031582B - Laser alarm and method - Google Patents
Laser alarm and method Download PDFInfo
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- CN115031582B CN115031582B CN202210717315.2A CN202210717315A CN115031582B CN 115031582 B CN115031582 B CN 115031582B CN 202210717315 A CN202210717315 A CN 202210717315A CN 115031582 B CN115031582 B CN 115031582B
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- 230000004927 fusion Effects 0.000 claims description 9
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
- F41H11/00—Defence installations; Defence devices
Abstract
The invention relates to a laser alarm and a method thereof, which relates to the field of laser alarms, wherein the laser alarm comprises: a plurality of modular alarm probes, a host and a transfer controller; the modular alarm detector heads are arranged on the protection target in a combined way; each modularized alarm detector head is connected with the switching controller; the switching controller is connected with the host; the switching controller is used for performing tilt compensation on the electric pulse signals detected by the modularized alarm detector head and sending the electric pulse signals subjected to tilt compensation to the host; the host is used for carrying out fusion processing according to the electric pulse signals after inclination compensation, and determining the position information of the attack laser so as to realize the alarm of the attack laser. The invention can carry out omnibearing protection early warning on the protection target.
Description
Technical Field
The invention relates to the field of laser alarms, in particular to a laser alarm and a method.
Background
At present, laser guided weapons implement high-precision striking on various combat platforms and key targets, and laser threat signals are required to be sorted and alarmed for realizing photoelectric protection. However, in practical application, a series of defects exist, including that laser guided weapons attack large ships, command posts, vehicle-mounted missile weapon platforms, missile battle array and other heavy targets, the range and the position difference of the protected targets to be protected are large, and a single laser alarm cannot provide omnibearing protection for the protected targets.
The current China laser alarm device is not in modularized design, can not carry out more targeted protection on targets, and has low efficiency. Or a plurality of single laser alarms are used for data processing, so that not only is time consumption increased, but also a lot of unnecessary cost is increased, and the method is lack of practicability in a battlefield environment, and is extremely easy to cause deviation of laser measurement of attack to cause deviation induction failure. Therefore, how to perform omnibearing protection and early warning on a protection target needs to be solved urgently.
Disclosure of Invention
The invention aims to provide a laser alarm and a method thereof, which are used for carrying out omnibearing protection early warning on a protection target.
In order to achieve the above object, the present invention provides the following solutions:
a laser alert, comprising: a host, a switching controller and a plurality of modularized alarm probes;
the modular alarm detector heads are arranged on the protection target in a combined way; each modularized alarm detector head is connected with the switching controller; the switching controller is connected with the host; the switching controller is used for performing tilt compensation on the electric pulse signals detected by the modularized alarm detector head and sending the electric pulse signals subjected to tilt compensation to the host; the host is used for carrying out fusion processing according to the electric pulse signals after inclination compensation, and determining the position information of the attack laser so as to realize the alarm of the attack laser.
Optionally, the modular alarm probe includes a probe body and a probe assembly; a window is arranged on the main body of the probe; the detector head assembly includes a laser receiver; the laser receiver comprises a protective mirror, a photodiode, an amplifying circuit and a comparing circuit; the photodiode, the amplifying circuit and the comparing circuit are connected in sequence; the comparison circuit is connected with the switching controller; the protective mirror is fixed at the window; the photodiode, the amplifying circuit and the comparing circuit are fixed inside the probe body.
Optionally, the main body of the probe is a structure body formed by 3D printing nylon composite carbon fiber materials.
Optionally, the transfer controller comprises an information processing board and an LSM303DLH module connected with the information processing board; the information processing board is connected with the modularized alarm detector; the LSM303DLH module is used for performing inclination compensation on the electric pulse signal.
Optionally, the information processing board comprises a singlechip, an FPGA and a dual-port interface, wherein the FPGA and the dual-port interface are all connected with the singlechip; the singlechip is connected with the modularized alarm detector; the FPGA is connected with the host through the double-port interface.
Optionally, the probe assembly further comprises a power board connected to the laser receiver; the power panel is also connected with the switching controller.
A laser warning method, the laser warning method being applied to the laser warning device of any one of the above, the laser warning method comprising:
acquiring an electric pulse signal detected by a modularized alarm detector;
performing tilt compensation on the electric pulse signal to obtain an electric pulse signal subjected to tilt compensation;
determining azimuth information of the attack laser and frequency and time information of the attack laser according to the electric pulse information subjected to the inclination compensation;
fusing the azimuth information of the attack laser, the frequency of the attack laser and the time information to obtain fused data; the fusion data is used for alarming the incoming laser.
Optionally, the expression of the azimuth information of the incoming laser is:
wherein θ N For the azimuth information of the laser attack, Y an For the nth alarm detector head module to deviate from the parameters of the right east relative to the transfer controller, X an For the n-th alarm detector head module to deviate from the north parameter relative to the transfer controller, X m For the alarm detector head module to point to north, Y m To the right, Y for the alarm detector head module N To deviate the parameters of the coming laser from the right east relative to the alarm detector head module, X N The laser is deviated from the north-right parameter relative to the alarm detector head module for the attack.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the modularized alarm detection heads are arranged on the protection target in a combined way; each modularized alarm detector head is connected with the switching controller; the switching controller is connected with the host; the switching controller is used for performing tilt compensation on the electric pulse signals detected by the modularized alarm detector head and sending the electric pulse signals subjected to tilt compensation to the host; the host is used for carrying out fusion processing according to the electric pulse signals after inclination compensation, and determining the position information of the attack laser so as to realize the alarm of the attack laser. The comprehensive protection early warning of the protection target is realized by combining a plurality of modularized alarm probes arranged on the protection target.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a diagram showing the effect of a conventional laser alarm;
FIG. 2 is a diagram showing the effect of comparing the protection area of the laser alarm of the present invention with that of the conventional laser alarm;
FIG. 3 is a diagram of a laser warning device model provided by the invention;
FIG. 4 is a diagram of a combined state model of three modular laser alarms;
FIG. 5 is a schematic diagram of a laser receiver photoelectric conversion circuit;
FIG. 6 is a laser receiver photoelectric conversion circuit PCB diagram;
FIG. 7 is a schematic diagram of a laser alarm according to the present invention.
Symbol description:
1-modularization alarm detecting head, 2-switching controller, 3-host computer, 4-connecting cable.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a laser alarm and a method thereof, which are used for carrying out omnibearing protection early warning on a protection target.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
The laser warning device is also called a laser warning receiver, is a laser detection device in a photoelectric countermeasure system, is used for intercepting, measuring and identifying enemy laser signals, judges the threat degree of the enemy laser signals when the enemy laser signals are irradiated by military laser equipment such as an enemy laser range finder, a laser indicator and the like, and can provide information such as warning, laser emission source azimuth and the like and give an alarm in real time.
As shown in fig. 1, the laser alarm generally comprises an alarm probe, a switching controller, a tripod, a connecting cable and the like, the incoming laser directly irradiates the target, a certain distance deviation exists between the laser alarm and the target, the laser signal measured by the laser alarm is not the direct signal of the incoming laser, the measurement deviation of the azimuth of the actual incoming laser is easily caused, and how to reduce the measurement deviation is an unsolved problem of the prior device. In the current laser alarm device, the laser alarm device is relatively fixed in form and single in function. The device does not have the adjustment capability aiming at different protected targets, and the working state is single. The other idea of arranging a plurality of alarms is that the design cost is too high.
As shown in fig. 3, 4 and 7, the present invention provides a laser alarm, including: a host 3, a transit controller 2 and a plurality of modular alarm probes 1. Wherein the laser alarm further comprises a connection cable 4.
A plurality of modularized alarm detector heads 1 are arranged on a protection target in a combined way; the method can be used for setting up a group of at most six as a single one, and can be combined according to the needs of the protected objects. Each modularized alarm detector head 1 is connected with the switching controller 2; the transfer controller 2 is connected with the host 3; the switching controller 2 is used for performing tilt compensation on the electric pulse signals detected by the modularized alarming detection head 1 and sending the electric pulse signals subjected to tilt compensation to the host computer 3; the host computer 3 is used for carrying out fusion processing according to the electric pulse signals after inclination compensation, and determining the position information of the attack laser so as to realize the alarm of the attack laser. Each modular alarm probe 1 is connected to the transit controller 2 by a respective connection cable 4, and the transit controller 2 is connected to the host 3 by a connection cable 4.
As an alternative embodiment, the modular alarm probe 1 comprises a probe body and a probe assembly; a window is arranged on the main body of the probe; the detector head assembly includes a laser receiver; the laser receiver comprises a protective mirror, a photodiode, an amplifying circuit and a comparing circuit; the photodiode, the amplifying circuit and the comparing circuit are connected in sequence; the comparison circuit is connected with the switching controller 2; the protective mirror is fixed at the window; the photodiode, the amplifying circuit and the comparing circuit are fixed inside the probe body. The detector head main body is a structure body formed by 3D printing of nylon composite carbon fiber materials, and has good stability. The probe assembly further comprises a power panel connected with the laser receiver; the power panel is also connected with the transfer controller 2. The power panel supplies power to the laser receiver through a wire, and the interface is positioned on the laser receiver and connected to the switching controller 2 through a cable. The power panel is composed of a switching power supply module and a filter circuit, and converts direct current 12V input into the detection assembly into +5V and-5V.
Each modularized alarm detector 1 is internally provided with a set of detector components, the modularized alarm detectors 1 can be combined according to the actual condition of a protected object, and two windows are respectively arranged on the plane and the side face of each detector.
The protection mirror selects laser with a certain wave band to penetrate through a coating film, the photoelectric conversion is realized by the photodiode, so that a laser signal is converted into a photoelectric current signal, the photoelectric current signal is converted into a voltage signal through I/V, the voltage signal is amplified to a proper amplitude through an amplifier, then the voltage signal is amplified to a proper amplitude through a voltage comparator, and a signal exceeding a threshold value can form an electric pulse signal and is transmitted into the transfer controller 2 through a double-port interface. As shown in fig. 5 and 6, the laser receiver photoelectric conversion module adopts AMS1117-ADJ as a buck chip, converts +5v power into +3.3v power, uses C1 and C2 capacitors as filter capacitors, both are 0.1uf capacitors, adopts a serial circuit of LED1 and resistor R1 as a power indication circuit, adopts a serial circuit of LED2 and resistor R2 as a laser signal indication circuit, uses a 1N5817 schottky diode as an anti-reverse connection circuit, prevents the reverse connection of the positive and negative poles of the power supply, uses H2 as a reserved port of the photodiode, and needs to insert a diode when in use, uses H1 as a power interface, and is connected to the anode and the cathode of the power supply.
The positive electrode and the negative electrode of the 5V power supply are connected to the power supply interface H1, the 2 port in the power supply interface H1 is a negative electrode, and the 3 port is a positive electrode. The 3 port of the power interface H1 is connected with the positive electrode of the serial circuit of the LED1 and the resistor R1, the 2 port of the power interface H1 is connected with the negative electrode of the serial circuit of the LED1 and the resistor R1, when a 5V power supply supplies power, the circuit is conducted, and the LED1 emits light. The 3 ports of H1 are connected with the cathode of 1N5817, and the anode of 1N5817 is connected with the 3 ports of AMS1117-ADJ, so that the damage of the device caused by reverse connection of a power supply is prevented. The 4 port and the 1 port of the AMS1117-ADJ are connected with the 2 port in H1, and the 2 port of the AMS1117-ADJ outputs 3.3V voltage after passing through the buck chip and is connected with the 1 port of H2. The 2 port of H2 is connected with the positive pole of the serial circuit of the LED2 and the R2, the 3 port of H2 is connected with the negative pole of the serial circuit of the LED2 and the R2, when the photodiode detects the laser signal, the circuit is conducted, and the LED2 emits light. The 2 port in H2 is connected with the 1 port in H1, generates pulse signals, and is connected to an amplifying circuit and a comparing circuit for processing.
As an alternative embodiment, the transit controller 2 includes an information processing board and an LSM303DLH module connected to the information processing board; the information processing board is connected with the modularized alarm detector head 1; the LSM303DLH module is used for performing inclination compensation on the electric pulse signal. The information processing board comprises a singlechip, an FPGA and a double-port interface, wherein the FPGA and the double-port interface are all connected with the singlechip; the singlechip is connected with the modularized alarm detector head 1; the FPGA is connected with the host 3 through the double-port interface.
The information processing board is composed of a singlechip and an FPGA, and is used for processing the electric pulse signals input by the multi-path modularized alarm detector head 1 and transmitting the electric pulse signals to the host 3 by utilizing a double-port interface in a coding mode. The LSM303DLH module is provided with an inclination compensation function and is used for collecting position and azimuth information of a protected target, is connected with the information processing board through IIC communication and is sent to the host computer 3 through a double-port interface of the information processing board. The host computer 3 processes the received coded information and azimuth information, and completes positioning of the attack laser through data fusion processing. And meanwhile, the interface circuit processed by the switching controller 2 exchanges data with other devices.
The dual-port interface can be connected with the host 3 through the TTL-to-RS 485 module, and interconnection between the laser receiver and the switching controller 2 can be realized through a TTL serial port, and the transmission mode has the advantage of wireless electromagnetic interference resistance, and has the defect that a longer cable wire needs to be laid.
As shown in FIG. 2, compared with the traditional method, the protection area of the protected object is larger, the invention adopts a modularization mode, combines the actual characteristics of the protected object to carry out the arrangement of modularized probes, and improves the alarm range of the laser alarm. Meanwhile, the method of directly arranging the laser on the protected target reduces the measurement deviation of the incoming laser, obviously improves the alarm efficiency of the laser alarm, reduces the false alarm probability and provides information support for laser decoy interference. Meanwhile, the data are processed in a distributed data fusion mode, and after one module is damaged, the system can still work normally, so that the utilization rate of equipment is improved. Meanwhile, the attack laser early warning of the protected target can be realized in the advancing process of the protected target. The detection capability of the laser warning device is effectively enhanced, and reliable information support is provided for coping with laser guided weapons and better working tasks.
The invention also provides a laser warning method, which is applied to the laser warning device and comprises the following steps:
and acquiring an electric pulse signal detected by the modularized alarm detector head.
And performing tilt compensation on the electric pulse signal to obtain the electric pulse signal subjected to tilt compensation.
And determining azimuth information of the attack laser and frequency and time information of the attack laser according to the electric pulse information subjected to the inclination compensation.
Fusing the azimuth information of the attack laser, the frequency of the attack laser and the time information to obtain fused data; the fusion data is used for alarming the incoming laser.
The expression of the azimuth information of the incoming laser is as follows:
wherein θ N For the azimuth information of the laser attack, Y an For the nth alarm detector head module to deviate from the parameters of the right east relative to the transfer controller, X an For the n-th alarm detector head module to deviate from the north parameter relative to the transfer controller, X m For the alarm detector head module to point to north, Y m To the right, Y for the alarm detector head module N To deviate the parameters of the coming laser from the right east relative to the alarm detector head module, X N The laser is deviated from the north-right parameter relative to the alarm detector head module for the attack.
The invention also provides a data fusion processing process of the laser warning method in practical application, the azimuth reference of the invention is true north, comprising:
step 1:
and constructing a plane rectangular coordinate system O-XY by taking the module as an origin, taking the north direction 0 degree as a reference direction, and taking the clockwise direction as the positive direction.
Step 2:
before use, the LSM303DLH module is calibrated with the north direction, and the data is recorded as (X m 0), calibrating the module with the forward direction, and recording the data as (0, Y) m )。X m ，Y m Is a return parameter for each module indicating that the module is pointing north and east.
Step 3:
modeling the protected object, directing the calibration direction of the module to the modular alarm detector heads, recording the values (X a1 ,Y a1 )，(X a2 ,Y a2 )，(X a3 ,Y a3 )...(X an ,Y an ) And enter the data into the host.
(X a1 ,Y a1 ) The relative azimuth information of n modularized alarm heads can be obtained by pushing the azimuth parameters of the first modularized alarm probe relative to the LSM303DLH module.
The host computer calculates the formula according to the calculationThe angle of each alarm probe can be obtained as
Constructing a corresponding relation between an azimuth value and an alarm probe in a host, and recording data as theta a1 ，θ a2 ，θ a3 ...θ an 。θ a1 And the relative azimuth angle values of n modularized alarm heads can be obtained for the azimuth angle parameters of the first modularized alarm probe relative to the LSM303DLH module and the like.
Step 4:
the host obtains the orientation information (X) of the protected object by accepting the real-time orientation data N ,Y N ) Calculating the angle delta theta of the protected target azimuth deviating from the reference azimuth through a formula M Comparing the angle record values of the alarm probe, calculating the angle of the alarm probe relative to the target azimuth and recording the data as theta 1 ，θ 2 ，θ 3 ...θ n After capturing the incoming laser, the host computer gives an early warning to the incoming laser to obtain azimuth information theta of the incoming laser N ，θ N ＝θ n +Δθ M 。
Can be pushed out therefrom
Step 5:
before data fusion, time system processing is required. Real-time data of the LSM303DLH module is sent to the information processing board through IIC communication, real-time data of the multi-channel modularized alarm detection head is sent to the information processing board through serial port communication, the real-time data is processed by the information processing board in a systematic way, and the processed data is sent to the host for data fusion. Recording the real-time information of the system as t N 。
Step 6:
after the alarm probe captures the incoming laser, the host computer gives an early warning to the incoming laser to obtain the azimuth information of the incoming laser. Obtaining the frequency f of the laser by the electric pulse information of the alarm probe N 。
Step 7:
in the data fusion, azimuth information, frequency information and time information of laser attack are fused (t N ,f N ,θ N ) And encoding the data and sending the encoded data to the host, thereby completing the data fusion processing.
The invention aims to improve the measurement deviation of the azimuth of the actual incoming laser, realize data fusion and protect the target more pertinently. The method comprises the steps of receiving incoming laser information by adopting a modularized combined laser receiver, constructing a data analysis model based on target information, and carrying out data processing on the collected laser information by a rear-end processor. Determining data parameters of the laser in a software and hardware combined mode; the modularized assembly of the laser sensor is realized, and the early warning visual angle can be selected through a module; the laser early warning rapid processing is realized, the response speed of the system is obviously improved, and the best interference effect on the laser signal is realized in cooperation. In addition, through arranging a plurality of traditional laser alarms and then carrying out data fusion, the omnibearing detection can be carried out, but the effect is less ideal than that of the invention, and the protection of the target in the advancing process can not be completed.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (8)
1. A laser alert, comprising: a host, a switching controller and a plurality of modularized alarm probes;
the modular alarm detector heads are arranged on the protection target in a combined way; each modularized alarm detector head is connected with the switching controller; the switching controller is connected with the host; the switching controller is used for performing tilt compensation on the electric pulse signals detected by the modularized alarm detector head and sending the electric pulse signals subjected to tilt compensation to the host; the host is used for carrying out fusion processing according to the electric pulse signals after inclination compensation, and determining the position information of the attack laser so as to realize the alarm of the attack laser.
2. The laser alarm of claim 1 wherein the modular alarm probe comprises a probe body and a probe assembly; a window is arranged on the main body of the probe; the detector head assembly includes a laser receiver; the laser receiver comprises a protective mirror, a photodiode, an amplifying circuit and a comparing circuit; the photodiode, the amplifying circuit and the comparing circuit are connected in sequence; the comparison circuit is connected with the switching controller; the protective mirror is fixed at the window; the photodiode, the amplifying circuit and the comparing circuit are fixed inside the probe body.
3. The laser warning device of claim 2 wherein the probe body is a 3D printed structure using nylon composite carbon fiber material.
4. The laser alarm of claim 1 wherein the transit controller comprises an information processing board and an LSM303DLH module connected to the information processing board; the information processing board is connected with the modularized alarm detector; the LSM303DLH module is used for performing inclination compensation on the electric pulse signal.
5. The laser warning device of claim 4, wherein the information processing board comprises a single chip microcomputer, an FPGA and a dual port interface, all connected with the single chip microcomputer; the singlechip is connected with the modularized alarm detector; the FPGA is connected with the host through the double-port interface.
6. The laser alarm of claim 2 wherein the detector head assembly further comprises a power board connected to the laser receiver; the power panel is also connected with the switching controller.
7. A laser warning method, characterized in that the laser warning method applies the laser warning device according to any one of claims 1 to 6, the laser warning method comprising:
acquiring an electric pulse signal detected by a modularized alarm detector;
performing tilt compensation on the electric pulse signal to obtain an electric pulse signal subjected to tilt compensation;
determining azimuth information of the attack laser and frequency and time information of the attack laser according to the electric pulse information subjected to the inclination compensation;
fusing the azimuth information of the attack laser, the frequency of the attack laser and the time information to obtain fused data; the fusion data is used for alarming the incoming laser.
8. The laser warning method of claim 7, wherein the expression of the azimuth information of the incoming laser is:
wherein θ N For the azimuth information of the laser attack, Y an For the nth alarm detector head module to deviate from the parameters of the right east relative to the transfer controller, X an For the n-th alarm detector head module to deviate from the north parameter relative to the transfer controller, X m For the alarm detector head module to point to north, Y m To the right, Y for the alarm detector head module N To deviate the parameters of the coming laser from the right east relative to the alarm detector head module, X N The laser is deviated from the north-right parameter relative to the alarm detector head module for the attack.
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