Laser target simulator based on linear attenuation piece

Abstract

The utility model relates to a laser target simulator based on linear attenuation slices. A variable attenuation assembly comprises a linear variable attenuation slice group used for attenuating laser and a linear moving mechanism used for moving the linear variable attenuation slice group according to a designed speed; the moving direction of the linear variable attenuation slice group is vertical to the central axis of the laser exit port of the light source module, so that the attenuated laser simulates the echo energy change in an actual scene in the moving process; a displacement transformation curve is formed by utilizing the corresponding relation between the displacement change and the attenuation degree of the linear variable attenuation slice group in the moving process, and then a control scheme for controlling the moving speed of the linear variable attenuation slice group is obtained by utilizing the transformation relation between the preset bound energy change curve and the displacement transformation curve; therefore, the laser energy continuous change function required for debugging the indoor light spot tracking function can be realized only by controlling the moving speed, a complex rotation or combination mechanism is not needed, and the adjustment and calibration requirements and cost are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of indoor spot tracking, and in particular to a laser target simulator based on a linear attenuation sheet. Background Art

[0002] The current laser target simulator is mainly used for indoor spot tracking function debugging. It simulates the energy change of the laser target echo signal during the target approach process in the semi-physical simulation of the seeker. Its laser light source has the function of adjustable frequency and energy attenuation.

[0003] There are many ways to implement the laser target energy change of current laser simulators, such as fixed attenuation plate combination, light beam combination, rotating disk combination, etc. However, the simulation devices corresponding to these implementation methods have complex structures, large volumes, and high precision requirements, which are not convenient for simple function debugging indoors. Utility Model Content

[0004] The embodiment of the present application provides a laser target simulator based on a linear attenuation plate to solve the problem that the corresponding simulation device for implementing the laser target energy change of the laser simulator in the related art has a complex structure and is not convenient for simple functional debugging indoors.

[0005] In a first aspect, a laser target simulator based on a linear attenuation sheet is provided, comprising:

[0006] A light source module, which is used to simulate lasers in actual scenes;

[0007] A variable attenuation component, which is arranged on a base with the light source module, and comprises a linear variable attenuation sheet group for attenuating the laser, and a linear moving mechanism for moving the linear variable attenuation sheet group at a designed speed; the moving direction of the linear variable attenuation sheet group is perpendicular to the central axis of the laser outlet of the light source module, so that during the movement, the attenuated laser simulates the echo energy change in the actual scene;

[0008] The power detection component is arranged on the base and is used to detect the power of the attenuated laser.

[0009] In some embodiments, the linear variable attenuation plate set includes a U-shaped fixing fixture and a long linear gradient filter;

[0010] The end surfaces of both ends of the U-shaped fixing tool are provided with a plurality of first mounting slots spaced apart and distributed along the direction of the central axis; each first mounting slot is connected to the internal space of the U-shaped fixing tool;

[0011] The linear gradient filter is clamped in the internal space through the first mounting slot; the light transmittance of each linear gradient filter is not equal.

[0012] In some embodiments, the linear variable attenuation plate set includes an annular fixing fixture and a long linear gradient filter;

[0013] The annular fixing fixture is provided with a light-transmitting channel, and a plurality of second mounting slots communicating with the light-transmitting channel are provided on the top or side thereof; the plurality of second mounting slots are distributed at intervals along the direction of the central axis;

[0014] The linear gradient filter is clamped in the light transmission channel through the second installation slot; the light transmittance of each linear gradient filter is not equal.

[0015] In some embodiments, the linear gradient filter includes four types, the first type has a transmittance of OD0-OD1; the second type has a transmittance of OD0-OD2; the third type has a transmittance of OD0-OD3; and the fourth type has a transmittance of OD0-OD4.

[0016] In some embodiments, the linear motion mechanism comprises:

[0017] A mechanical moving part having a slider connected to the linear variable attenuation sheet group;

[0018] The movement control part is connected with the mechanical movement part signal, and is used to obtain control parameters and move the slider at a designed speed according to the control parameters.

[0019] In some embodiments, the mechanical movement part includes a lead screw; the lead screw passes through the slider and is threadedly connected to the slider; the lead screw is connected to a drive motor; the drive motor is signal-connected to the movement control part; the mechanical movement part also includes a linear guide rail parallel to the lead screw, and the slider is slidably arranged on the linear guide rail.

[0020] In some embodiments, the power detection component includes a spectroscope and a power detector; the spectroscope is mounted on the base, and is arranged on both sides of the linear motion mechanism together with the light source module; an angle is formed between a straight line where one side of the spectroscope connected to the base is located and the moving direction, so as to split the attenuated laser light;

[0021] The power detector is arranged on the same side as the spectroscope and is used to detect the laser light split by the spectroscope and to record the power change of the laser light.

[0022] In some embodiments, the light source module includes a laser pulse light source and a collimating optical component, and the laser pulse light source adopts a semiconductor light source.

[0023] In some embodiments, it also includes a connected light source driving module and a coding module, the light source driving module is connected to the laser pulse light source and is used to provide power and control signals for the laser pulse light source; the coding module is used to store or load coding information in real time according to actual needs, and is used to encode the laser signal of the laser pulse light source according to the coding information.

[0024] In some embodiments, the encoding module includes an encoding unit, an external trigger interface and a storage unit; the encoding unit has multiple encoding types built in and is used to encode the laser signal of the laser pulse light source; the external trigger interface is connected to the encoding unit and is used to externally expand the encoding module; the storage unit is used to pre-store the encoding.

[0025] The beneficial effects of the technical solution provided by this application include:

[0026] The embodiment of the present application provides a laser target simulator based on a linear attenuation sheet. Since the variable attenuation component and the light source module are arranged on a base, and include a linear variable attenuation sheet group for attenuating the laser, and a linear moving mechanism for moving the linear variable attenuation sheet group at a designed speed; the moving direction of the linear variable attenuation sheet group is perpendicular to the central axis of the laser outlet of the light source module, so that during the movement, the attenuated laser simulates the echo energy change in the actual scene; through the above structure, a displacement transformation curve is formed by the corresponding relationship between the displacement change of the linear variable attenuation sheet group and the attenuation degree during the movement, and then the conversion relationship between the preset bound energy change curve and the displacement transformation curve is used to obtain a control scheme for controlling the moving speed of the linear variable attenuation sheet group; thus, only the moving speed of the linear variable attenuation sheet group needs to be controlled to realize the laser energy continuous change function required for indoor spot tracking function debugging, without the need for complex rotation or combination mechanism; only considering the indoor function debugging requirements, the overall requirements for aberration, energy uniformity, spot energy change accuracy, etc. do not need to meet the high-precision requirements of the seeker semi-physical simulation level, so it can meet the indoor requirements, and the device reduces the design difficulty and adjustment requirements, and on the other hand, the requirements for components are also reduced, further reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 A schematic diagram of the overall structure of a laser target simulator based on a linear attenuation plate provided in an embodiment of the present application;

[0029] Figure 2 A schematic diagram of the overall structure of a laser target simulator based on a linear attenuation plate from another perspective provided in an embodiment of the present application;

[0030] Figure 3 A schematic top view of a laser target simulator based on a linear attenuation sheet provided in an embodiment of the present application;

[0031] Figure 4 The overall structural block diagram of the laser target simulator based on the linear attenuation plate provided in the embodiment of the present application;

[0032] Figure 5 A flowchart of a laser target simulator based on a linear attenuation plate provided in an embodiment of the present application.

[0033] In the figure: 1. light source module; 2. base; 3. linear variable attenuation plate group; 300. U-shaped fixing tool; 301. first mounting slot; 302. linear gradient filter; 4. linear moving mechanism; 400. linear guide rail; 401. slider; 402. driving motor; 5. spectroscope; 6. power detector. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0035] It should be understood that:

[0036] There are many ways to implement the energy change of laser targets in current laser simulators, such as fixed attenuation plate combination, light beam combination, rotating disk combination, etc. The overall idea is that the more complex the better, because the high-precision requirements of the semi-physical simulation level of the seeker must be met.

[0037] However, the debugging is carried out indoors, and only the indoor function debugging needs are considered. The overall requirements for aberration, energy uniformity, spot energy change accuracy, etc. do not need to meet the high-precision requirements of the seeker semi-physical simulation level. Therefore, the use of existing laser simulators obviously has the disadvantages of complex debugging and high investment costs.

[0038] Therefore, the present application proposes a laser target simulator based on a linear attenuator with a simple structure, low cost, reduced device design difficulty, and reduced adjustment requirements, so as to solve the problem that the corresponding simulation device of the implementation method of the laser target energy change of the laser simulator in the related art has a complex structure and is not convenient for simple function debugging indoors.

[0039] Please refer to Figure 1-Figure 4 , a laser target simulator based on linear attenuation sheet, which mainly includes three parts, which can be referred to Figure 4 , specifically: light source module 1, variable attenuation component and power detection component.

[0040] A light source module 1, which is used to simulate laser light in actual scenes;

[0041] The variable attenuation component is arranged on the base 2 together with the light source module 1, and comprises a linear variable attenuation sheet group 3 for attenuating the laser, and a linear moving mechanism 4 for moving the linear variable attenuation sheet group 3 at a designed speed, which can drive the linear variable attenuation sheet group 3 to move according to the energy curve change requirements calibrated in advance; the moving direction of the linear variable attenuation sheet group 3 is perpendicular to the central axis of the laser emission port of the light source module 1, so that during the movement, the attenuated laser simulates the echo energy change in the actual scene;

[0042] The power detection component is arranged on the base 2 and is used to detect the power of the attenuated laser so as to intuitively judge whether the energy change of the debugged laser meets the debugging requirements.

[0043] Through the above settings, the moving direction of the linear variable attenuation sheet group 3 is perpendicular to the central axis of the laser outlet of the light source module 1, so that during the movement, the attenuated laser simulates the echo energy change in the actual scene; through the above structure, the displacement transformation curve formed by the correspondence between the displacement change of the linear variable attenuation sheet group 3 and the attenuation degree during the movement is used, and then the transformation relationship between the preset bound energy change curve and the displacement transformation curve is used to obtain a control scheme for controlling the moving speed of the linear variable attenuation sheet group 3; thus, only the moving speed of the linear variable attenuation sheet group 3 needs to be controlled to realize the laser energy continuous change function required for indoor spot tracking function debugging, without the need for complex rotation or combination mechanism; only considering the indoor function debugging needs, the overall requirements for aberration, energy uniformity, spot energy change accuracy, etc. do not need to meet the high-precision requirements of the semi-physical simulation level of the guide head, so it can meet the indoor requirements, and the device reduces the design difficulty and adjustment requirements, and on the other hand, the requirements for components are also reduced, further reducing the cost.

[0044] In some preferred embodiments, the power detection component is described in detail:

[0045] The power detection component includes a spectroscope 5 and a power detector 6; the spectroscope 5 is installed on the base 2, and is arranged on both sides of the linear moving mechanism 4 with the light source module 1; an angle is formed between the straight line where one side of the spectroscope 5 connected to the base 2 is located and the moving direction, so as to split the attenuated laser; the power detector 6 is arranged on the same side as the spectroscope 5, and is used to detect the laser separated by the spectroscope 5, and to record the power change of the laser.

[0046] The power detector 6 is a pre-existing product and will not be described in detail here. The power detector 6 can provide a more intuitive display during the adjustment process and record the energy change process for easy debugging to simulate the change of the target echo laser during the spot tracking process.

[0047] In some preferred embodiments, the linear variable attenuation sheet group 3 also needs to have the function of improving the adjustment simulation range, so the following settings are provided:

[0048] The first type, the linear variable attenuation plate group 3 includes a U-shaped fixing tool 300 and a long linear gradient filter 302; the end faces of the two ends of the U-shaped fixing tool 300 are provided with a plurality of first mounting slots 301 spaced apart along the direction of the central axis; each first mounting slot 301 is connected to the internal space of the U-shaped fixing tool 300; the linear gradient filter 302 is clamped in the internal space through the first mounting slot 301; the transmittance of each linear gradient filter 302 is not equal.

[0049] The second type, the linear variable attenuation plate group 3 includes an annular fixing fixture and a long linear gradient filter 302; a light-transmitting channel is provided in the annular fixing fixture, and a plurality of second mounting slots connected to the light-transmitting channel are provided on the top or side thereof; the plurality of second mounting slots are spaced apart along the direction of the central axis; the linear gradient filter 302 is connected to the light-transmitting channel through the second mounting slots; the light transmittance of each linear gradient filter 302 is not equal

[0050] The linear gradient filter 302 includes four types. The first type has a transmittance of OD0-OD1; the second type has a transmittance of OD0-OD2; the third type has a transmittance of OD0-OD3; and the fourth type has a transmittance of OD0-OD4.

[0051] The above realizes that in consideration of different requirements for the energy range and subdivision degree of laser energy change in different situations, four linear gradient filters OD0~1, 0~2, 0~3, and 0~4 are selected and combined to achieve different degrees of attenuation according to needs when moving the same distance.

[0052] Furthermore, the matching linear moving mechanism 4 includes: a mechanical moving part, which has a slider 401 connected to the linear variable attenuation plate group 3; a moving control part, which is connected to the signal of the mechanical moving part, and the moving control part is used to obtain control parameters and move the slider 401 at a designed speed according to the control parameters.

[0053] The mobile control part has a built-in automatic calibration function. By calibrating the linear variable attenuation sheet group required for the test before use, the corresponding relationship between displacement and attenuation degree, that is, the displacement transformation curve, is obtained, and the transformation relationship from the bound energy change curve to the displacement transformation curve is realized in the processor of the mobile control part. When in use, the slider 401 is controlled to move at a calculated speed to realize the continuous change function of laser energy required for debugging the indoor spot tracking function.

[0054] Furthermore, the mechanical motion part includes a lead screw; the lead screw passes through a slider 401 and is threadedly connected to the slider 401; the lead screw is connected to a drive motor 402; the drive motor 402 is signal-connected to the movement control part; the mechanical motion part also includes a linear guide rail 400 parallel to the lead screw, and the slider 401 is slidably arranged on the linear guide rail 400. Of course, the mechanical motion part can also be other structures that can achieve linear displacement; for example, a high-precision small slide module. By binding the target laser coding information and the energy curve of the energy change over time that has been calibrated in advance, the high-precision small slide module is controlled to carry a set of linear variable attenuation plate groups 3 to achieve the change of the coded laser power, thereby simulating the change of the target echo laser in the spot tracking process; thus, the composition is simple, without the need for complex rotation or combination mechanisms, and it is achieved only by controlling the linear gradient attenuation plate and the high-precision small slide module.

[0055] The above process can refer to Figure 5 The workflow diagram shown is, that is, laser parameter binding, generating target laser with coding information, and transmitting the target laser with coding information to the linear variable attenuation plate group 3; according to the energy curve input, and the displacement transformation curve of the linear moving mechanism 4 is calibrated in advance, the parameters of the design speed change of the displacement are obtained, that is, the above control scheme; the linear moving mechanism 4 moves at different rates according to the energy change requirements, so that after passing through the linear variable attenuation plate group 3, a laser signal carrying specified coding information and energy changing according to the specified requirements is generated, wherein the spectroscope 5 splits the attenuated coded laser to the power detector 6, detects and records the power change of the laser signal, so as to show the final effect of the debugging.

[0056] In some preferred embodiments, the light source module 1 includes a laser pulse light source and a collimating optical component, and the laser pulse light source adopts a semiconductor light source. The collimating optical component completes the simple light homogenization and collimation effect of the semiconductor light source; the laser pulse light source comprehensively considers the laser target light source and the applicable scene of the device, selects a 1.064um semiconductor laser, and cooperates with the driving circuit to achieve an adjustable laser power of not less than 10W, a frequency range of 10Hz to 25Hz, and a pulse width between 10 and 22ns.

[0057] That is, it can work uninterruptedly for a long time. Compared with traditional solid-state lasers, semiconductor lasers have the advantages of relatively long working time and low power consumption, which is conducive to long-term debugging needs in indoor functional debugging scenarios.

[0058] In some preferred embodiments, since the existing laser pulse frequency adjustment is mostly fixed frequency adjustment, which does not conform to the actual situation of current and future laser light detectors containing complex coded information, the following settings are provided:

[0059] It also includes a connected light source driving module and a coding module. The light source driving module is connected to the laser pulse light source and is used to provide power and control signals for the laser pulse light source; the coding module is used to store or load coding information in real time according to actual needs, and is used to encode the laser signal of the laser pulse light source according to the coding information.

[0060] The encoding module includes an encoding unit, an external trigger interface and a storage unit; the encoding unit has multiple encoding types built in and is used to encode the laser signal of the laser pulse light source; the external trigger interface is connected to the encoding unit and is used to externally expand the encoding module; the storage unit is used to pre-store the encoding.

[0061] Therefore, the encoding module can realize common fixed frequency code, variable interval code, pseudo-random code and other code types, and reserve an external trigger interface, which can be externally expanded with other encoding modules. The built-in storage function can realize the pre-storage of more than 10,000 sets of codes, and supports online upgrade binding. That is, it is compatible with multiple codes and has subsequent expandable functions. Compared with the traditional laser target simulator that can only use a simple fixed frequency adjustment function, this device can have 10,000 sets of codes built in, realize multiple types of codes and support external triggering and upgrade expansion functions.

[0062] In summary, the laser target simulator based on linear attenuation plate, which is suitable for simulating the change of laser echo energy during the debugging of indoor spot tracking function, can realize the simple programmable adjustment of laser energy and the compatibility and subsequent expansion of the current complex coding information of laser target signal. On the one hand, it reduces the difficulty of device design and the adjustment requirements, and on the other hand, it also reduces the requirements for the internal components of the device, further reducing the cost of the device; it has the advantages of simple structure and low cost, and at the same time provides a more complex laser coding function, which makes up for the shortcomings of traditional laser target simulators in this regard.

[0063] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0064] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0065] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A laser target simulator based on a linear attenuation sheet, characterized in that: It includes: A light source module (1), which is used to simulate laser light in an actual scene; A variable attenuation component is arranged on a base (2) together with the light source module (1), and comprises a linear variable attenuation sheet group (3) for attenuating the laser, and a linear movement mechanism (4) for moving the linear variable attenuation sheet group (3) at a designed speed; the moving direction of the linear variable attenuation sheet group (3) is perpendicular to the central axis of the laser emission port of the light source module (1), so that during the movement, the attenuated laser simulates the echo energy change in an actual scene; A power detection component is arranged on the base (2) and is used to detect the power of the attenuated laser.

2. The laser target simulator based on the linear attenuation sheet as claimed in claim 1, characterized in that: The linear variable attenuation plate set (3) comprises a U-shaped fixing fixture (300) and a long linear gradient filter (302); The end surfaces at both ends of the U-shaped fixing tool (300) are provided with a plurality of first mounting slots (301) spaced apart and distributed along the direction of the central axis; each first mounting slot (301) is in communication with the internal space of the U-shaped fixing tool (300); The linear gradient filter (302) is clamped in the internal space via the first mounting clamping slot (301); the light transmittance of each linear gradient filter (302) is unequal.

3. The laser target simulator based on the linear attenuation sheet as claimed in claim 1, characterized in that: The linear variable attenuation plate group (3) comprises an annular fixing tool and a long linear gradient filter (302); The annular fixing fixture is provided with a light-transmitting channel, and a plurality of second mounting slots communicating with the light-transmitting channel are provided on the top or side thereof; the plurality of second mounting slots are distributed at intervals along the direction of the central axis; The linear gradient filter (302) is clamped in the light transmission channel via a second mounting clamping slot; the light transmittance of each linear gradient filter (302) is unequal.

4. The laser target simulator based on the linear attenuation sheet according to claim 2 or 3, characterized in that: The linear gradient filter (302) includes four types, the first type has a light transmittance of OD0-OD1; the second type has a light transmittance of OD0-OD2; the third type has a light transmittance of OD0-OD3; and the fourth type has a light transmittance of OD0-OD4.

5. The laser target simulator based on the linear attenuation sheet as claimed in claim 1, characterized in that: The linear motion mechanism (4) comprises: A mechanical moving part, which has a slider (401) connected to the linear variable attenuation sheet group (3); A movement control part is connected to the mechanical movement part signal, and the movement control part is used to obtain control parameters and move the slider (401) at a designed speed according to the control parameters.

6. The laser target simulator based on the linear attenuation sheet as claimed in claim 5, characterized in that: The mechanical motion part comprises a lead screw; the lead screw passes through the slider (401) and is threadedly connected to the slider (401); the lead screw is connected to a drive motor (402); the drive motor (402) is signal-connected to the movement control part; the mechanical motion part also comprises a linear guide rail (400) parallel to the lead screw, and the slider (401) is slidably arranged on the linear guide rail (400).

7. The laser target simulator based on the linear attenuation sheet as claimed in claim 1, characterized in that: The power detection component comprises a beam splitter (5) and a power detector (6); the beam splitter (5) is mounted on the base (2), and is arranged on both sides of the linear moving mechanism (4) together with the light source module (1); an angle is formed between a straight line where one side of the beam splitter (5) connected to the base (2) is located and the moving direction, so as to split the attenuated laser light; The power detector (6) is arranged on the same side as the beam splitter (5), and is used to detect the laser light split by the beam splitter (5), and to record the power change of the laser light.

8. The laser target simulator based on the linear attenuation sheet as claimed in claim 1, characterized in that: The light source module (1) comprises a laser pulse light source and a collimating optical component, and the laser pulse light source adopts a semiconductor light source.

9. The laser target simulator based on the linear attenuation sheet as claimed in claim 8, characterized in that: It also includes a connected light source driving module and a coding module. The light source driving module is connected to the laser pulse light source and is used to provide power and control signals for the laser pulse light source; the coding module is used to store or load coding information in real time according to actual needs, and is used to encode the laser signal of the laser pulse light source according to the coding information.

10. The laser target simulator based on the linear attenuation sheet as claimed in claim 9, characterized in that: The encoding module includes an encoding unit, an external trigger interface and a storage unit; the encoding unit has multiple encoding types built in and is used to encode the laser signal of the laser pulse light source; the external trigger interface is connected to the encoding unit and is used to externally expand the encoding module; the storage unit is used to pre-store the encoding.

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