Laser imaging target simulator and simulation method

Abstract

The application provides a laser imaging target simulator and a simulation method. The target simulator comprises: an optical lens, which is used for receiving laser output by a laser radar and is also used for emitting laser to the laser radar; a half-transmission half-reflection mirror, which is used for transmitting laser received by the optical lens to a four-quadrant detector and is also used for reflecting laser to the optical lens and finally to the laser radar; the four-quadrant detector, which is used for obtaining a 2*2-way electrical signal; a signal processing module, which is used for obtaining an n*n-way electrical signal containing position information and energy information of a laser spot; a multi-way signal delay module, which is used for obtaining an n*n-way electrical signal containing the position information, the energy information and preset distance simulation information of the laser spot; a laser, which is used for outputting continuous laser; a multi-way electro-optical modulator, which is used for obtaining an n*n-way pulsed laser signal containing the position information, the energy information and the preset distance simulation information of the laser spot; and a laser illumination module, which is used for obtaining laser beam combination.

Description

Technical Field

[0001] This invention relates to the field of laser simulation technology, and in particular to a laser imaging target simulator and simulation method. Background Technology

[0002] Laser imaging radars generally employ time-of-flight methods to acquire target distance information and obtain three-dimensional images of the detected target. There is an urgent need for ground-based functional performance testing during the development and maintenance phases of laser imaging radars. Full-process testing ensures the successful completion of strike missions. Therefore, both the research and hardware-in-the-loop (HILL) simulation of laser imaging radar involve the application of laser target simulators as core hardware.

[0003] Currently, laser target simulators used for testing laser imaging radar simulate target distance by using fiber optic delay lines and photoelectric delay, but they can only simulate point information and have difficulty obtaining target shape information. Summary of the Invention

[0004] This invention provides a laser imaging target simulator and simulation method, which can solve the technical problem that existing target simulators have difficulty in obtaining target shape information.

[0005] According to one aspect of the present invention, a laser imaging target simulator is provided, comprising:

[0006] The optical lens is used to receive the laser output from the lidar and project it to the semi-transparent mirror; it is also used to receive the laser beam reflected by the semi-transparent mirror, which contains the position information, energy information and preset distance simulation information of the laser spot, and project it to the lidar.

[0007] A semi-transparent and semi-reflective mirror is used to transmit the laser emitted from the optical lens to the four-quadrant detector; it is also used to reflect the laser beam containing the position information, energy information and preset distance simulation information of the laser spot back to the optical lens.

[0008] A four-quadrant detector is used to perform photoelectric conversion on laser light transmitted through a semi-transparent and semi-reflective mirror to obtain 2×2 electrical signals.

[0009] The signal processing module is used to process the 2×2 electrical signals to obtain n×n electrical signals containing the position and energy information of the laser spot; where n≥2 and is an integer;

[0010] The multi-channel signal delay module is used to introduce the delay information into n×n electrical signals containing the position information and energy information of the laser spot, respectively, to obtain n×n electrical signals containing the position information, energy information and preset distance simulation information of the laser spot.

[0011] A laser used to output continuous laser light;

[0012] A multi-channel electro-optic modulator is used to pulse modulate a continuous laser based on n×n electrical signals containing position information, energy information and preset distance simulation information of the laser spot, to obtain n×n pulse laser signals containing position information, energy information and preset distance simulation information of the laser spot;

[0013] The laser illumination module is used to transmit and then converge n×n pulsed laser signals containing laser spot position information, energy information and preset distance simulation information to obtain a laser beam containing laser spot position information, energy information and preset distance simulation information.

[0014] Preferably, the multi-channel signal delay module includes n×n signal delay modules, each of which is used to introduce delay information into a corresponding electrical signal containing the position information and energy information of the laser spot, to obtain an electrical signal containing the position information, energy information and preset distance simulation information of the laser spot.

[0015] Preferably, the multi-channel electro-optic modulator includes n×n electro-optic modulators, each of which is used to pulse modulate the continuous laser based on a corresponding electrical signal containing the position information, energy information and preset distance simulation information of the laser spot, to obtain a pulsed laser signal containing the position information, energy information and preset distance simulation information of the laser spot.

[0016] Preferably, the laser illumination module includes an n×n microlens array and a converging mirror. Each microlens is used to transmit a pulsed laser signal containing the position information, energy information and preset distance simulation information of the laser spot. The converging mirror is used to converge the pulsed laser signals transmitted by each microlens to obtain a laser beam containing the position information, energy information and preset distance simulation information of the laser spot.

[0017] Preferably, the semi-transparent and semi-reflective mirror is a 45° semi-transparent and semi-reflective mirror.

[0018] According to another aspect of the present invention, a simulation method for a laser imaging target simulator is provided, the method employing any of the target simulators described above, the method comprising:

[0019] The optical lens receives the laser output from the lidar and projects it onto the semi-transparent mirror.

[0020] A semi-transparent mirror transmits the laser emitted from the optical lens to the four-quadrant detector;

[0021] The four-quadrant detector performs photoelectric conversion on the laser transmitted through the semi-transparent and semi-reflective mirror to obtain 2×2 electrical signals;

[0022] The signal processing module processes the 2×2 electrical signals to obtain n×n electrical signals containing the position and energy information of the laser spot.

[0023] The multi-channel signal delay module introduces the delay information into n×n electrical signals containing the position information and energy information of the laser spot, respectively, to obtain n×n electrical signals containing the position information, energy information and preset distance simulation information of the laser spot;

[0024] The laser outputs continuous laser light.

[0025] The multi-channel electro-optic modulator pulses a continuous laser beam based on n×n electrical signals containing laser spot position information, energy information, and preset distance simulation information, thereby obtaining n×n pulsed laser signals containing laser spot position information, energy information, and preset distance simulation information.

[0026] The laser illumination module transmits and then converges n×n pulsed laser signals containing the position information, energy information and preset distance simulation information of the laser spot to obtain a laser beam containing the position information, energy information and preset distance simulation information of the laser spot.

[0027] A semi-transparent mirror reflects a laser beam containing the position information, energy information, and preset distance simulation information of the laser spot to an optical lens;

[0028] The optical lens receives a laser beam containing the position information, energy information and preset distance simulation information of the laser spot, which is reflected by a semi-transparent and semi-reflective mirror, and then emits it to the lidar.

[0029] The technical solution of this invention enables the receiving of laser radar photoelectric information for position information processing and high-precision delay processing, and can generate photoelectric signals with specific energy and delay to feed back to the laser radar. This invention allows for thorough performance testing of laser radar imaging-guided weapon systems in the development stage within a laboratory environment, and can simulate the entire transmission process of laser radar signals in real time, generating laser radar echo signals that match actual conditions. Attached Figure Description

[0030] The accompanying drawings, which form part of this specification, are provided to further illustrate embodiments of the invention and, together with the textual description, explain the principles of the invention. It is obvious that the drawings described below are merely some embodiments of the invention, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0031] Figure 1 A schematic diagram of a laser imaging target simulator provided according to an embodiment of the present invention is shown. Detailed Implementation

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0034] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0035] like Figure 1 As shown, the present invention provides a laser imaging target simulator, comprising:

[0036] An optical lens is used to receive the laser output from the lidar and project it onto a semi-transparent mirror; it is also used to receive the laser beam reflected by the semi-transparent mirror, which contains the position information, energy information and preset distance simulation information of the laser spot, and project it onto the lidar; the optical lens collects the laser output from the lidar and can match the entrance pupil and field of view of the lidar under test.

[0037] A semi-transparent and semi-reflective mirror is used to transmit laser light emitted from an optical lens to a four-quadrant detector; it is also used to reflect a laser beam containing position information, energy information, and preset distance simulation information to the optical lens; the semi-transparent and semi-reflective mirror is used to receive and transmit laser beams.

[0038] The four-quadrant detector is used to perform photoelectric conversion on the laser transmitted through the semi-transparent and semi-reflective mirror to obtain 2×2 electrical signals; among them, the 2×2 electrical signals are 2×2 matrix electrical signals, that is, four electrical signals;

[0039] The signal processing module is used to solve the 2×2 electrical signals to obtain n×n electrical signals containing the position and energy information of the laser spot; where n≥2 and is an integer; since the laser spot positions are different, the current of the four electrical signals are different. The signal processing module can solve the signal to obtain n×n electrical signals containing the position and energy information of the laser spot.

[0040] The multi-channel signal delay module is used to introduce the delay information into n×n electrical signals containing the position information and energy information of the laser spot, respectively, to obtain n×n electrical signals containing the position information, energy information and preset distance simulation information of the laser spot.

[0041] A laser used to output continuous laser light;

[0042] A multi-channel electro-optic modulator is used to pulse modulate a continuous laser based on n×n electrical signals containing position information, energy information and preset distance simulation information of the laser spot, to obtain n×n pulse laser signals containing position information, energy information and preset distance simulation information of the laser spot;

[0043] The laser illumination module is used to transmit and then converge n×n pulsed laser signals containing laser spot position information, energy information and preset distance simulation information to obtain a laser beam containing laser spot position information, energy information and preset distance simulation information.

[0044] This invention can receive photoelectric information from lidar for position information processing and high-precision delay processing, and can generate photoelectric signals with specific energy and delay to feed back to the lidar. This invention enables thorough performance testing of lidar imaging-guided weapon systems in the development stage within a laboratory environment, and can simulate the entire transmission process of lidar signals in real time, generating lidar echo signals that match actual conditions.

[0045] According to one embodiment of the present invention, the multi-channel signal delay module includes n×n signal delay modules, each of which is used to introduce delay information into a corresponding electrical signal containing the position information and energy information of the laser spot, to obtain an electrical signal containing the position information, energy information and preset distance simulation information of the laser spot.

[0046] The multi-channel signal delay module is used for high-precision delay processing. This module has n×n channels. Its core is an FPGA that can store delay calibration information to ensure that the n×n channels remain synchronized under the same delay. It also includes a communication module that can communicate with a host computer and receive delay information from the host computer.

[0047] According to one embodiment of the present invention, the multi-channel electro-optic modulator includes n×n electro-optic modulators, each of which is used to pulse modulate a continuous laser based on a corresponding electrical signal containing position information, energy information and preset distance simulation information of the laser spot, to obtain a pulsed laser signal containing position information, energy information and preset distance simulation information of the laser spot.

[0048] Among them, the multi-channel electro-optic modulator is used to pulse modulate the continuous laser output from the laser. The laser pulse signal output by the multi-channel electro-optic modulator is transmitted through n×n optical fibers and irradiates the n×n microlens array.

[0049] According to one embodiment of the present invention, the laser illumination module includes an n×n microlens array and a converging mirror. Each microlens is used to transmit a corresponding pulsed laser signal containing position information, energy information and preset distance simulation information of the laser spot. The converging mirror is used to converge the pulsed laser signals transmitted by each microlens to obtain a laser beam containing position information, energy information and preset distance simulation information of the laser spot.

[0050] According to one embodiment of the present invention, the semi-transparent and semi-reflective mirror is a 45° semi-transparent and semi-reflective mirror.

[0051] The present invention also provides a simulation method for a laser imaging target simulator, the method employing any of the target simulators described above, the method comprising:

[0052] The optical lens receives the laser output from the lidar and projects it onto the semi-transparent mirror.

[0053] A semi-transparent mirror transmits the laser emitted from the optical lens to the four-quadrant detector;

[0054] The four-quadrant detector performs photoelectric conversion on the laser transmitted through the semi-transparent and semi-reflective mirror to obtain 2×2 electrical signals;

[0055] The signal processing module processes the 2×2 electrical signals to obtain n×n electrical signals containing the position and energy information of the laser spot.

[0056] The multi-channel signal delay module introduces the delay information into n×n electrical signals containing the position information and energy information of the laser spot, respectively, to obtain n×n electrical signals containing the position information, energy information and preset distance simulation information of the laser spot;

[0057] The laser outputs continuous laser light.

[0058] The multi-channel electro-optic modulator pulses a continuous laser beam based on n×n electrical signals containing laser spot position information, energy information, and preset distance simulation information, thereby obtaining n×n pulsed laser signals containing laser spot position information, energy information, and preset distance simulation information.

[0059] The laser illumination module transmits and then converges n×n pulsed laser signals containing the position information, energy information and preset distance simulation information of the laser spot to obtain a laser beam containing the position information, energy information and preset distance simulation information of the laser spot.

[0060] A semi-transparent mirror reflects a laser beam containing the position information, energy information, and preset distance simulation information of the laser spot to an optical lens;

[0061] The optical lens receives a laser beam containing the position information, energy information and preset distance simulation information of the laser spot, which is reflected by a semi-transparent and semi-reflective mirror, and then emits it to the lidar.

[0062] In summary, this invention provides a laser imaging target simulator and simulation method, capable of receiving laser radar photoelectric information for position information processing and high-precision delay processing, and generating photoelectric signals with specific energy and delay to feed back to the laser radar. This invention enables thorough performance testing of laser radar imaging-guided weapon systems in the development stage within a laboratory environment, and can simulate the entire transmission process of laser radar signals in real time, generating laser radar echo signals that match actual conditions.

[0063] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0064] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0065] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A laser imaging target simulator, characterized in that, include: The optical lens is used to receive the laser output from the lidar and project it to the semi-transparent mirror; it is also used to receive the laser beam reflected by the semi-transparent mirror, which contains the position information, energy information and preset distance simulation information of the laser spot, and project it to the lidar. A semi-transparent and semi-reflective mirror is used to transmit the laser emitted from the optical lens to the four-quadrant detector; it is also used to reflect the laser beam containing the position information, energy information and preset distance simulation information of the laser spot back to the optical lens. A four-quadrant detector is used to perform photoelectric conversion on laser light transmitted through a semi-transparent and semi-reflective mirror to obtain 2×2 electrical signals. The signal processing module is used to process the 2×2 electrical signals to obtain n×n electrical signals containing the position and energy information of the laser spot; where n≥2 and is an integer; The multi-channel signal delay module is used to introduce the delay information into n×n electrical signals containing the position information and energy information of the laser spot, respectively, to obtain n×n electrical signals containing the position information, energy information and preset distance simulation information of the laser spot. A laser used to output continuous laser light; A multi-channel electro-optic modulator is used to pulse modulate a continuous laser based on n×n electrical signals containing position information, energy information and preset distance simulation information of the laser spot, to obtain n×n pulse laser signals containing position information, energy information and preset distance simulation information of the laser spot; The laser illumination module is used to transmit and then converge n×n pulsed laser signals containing laser spot position information, energy information and preset distance simulation information to obtain a laser beam containing laser spot position information, energy information and preset distance simulation information.

2. The target simulator according to claim 1, characterized in that, The multi-channel signal delay module includes n×n signal delay modules. Each signal delay module is used to introduce delay information into a corresponding electrical signal containing the position information and energy information of the laser spot, so as to obtain an electrical signal containing the position information, energy information and preset distance simulation information of the laser spot.

3. The target simulator according to claim 1, characterized in that, The multi-channel electro-optic modulator includes n×n electro-optic modulators. Each electro-optic modulator is used to pulse modulate the continuous laser based on the corresponding electrical signal containing the position information, energy information and preset distance simulation information of the laser spot, so as to obtain a pulsed laser signal containing the position information, energy information and preset distance simulation information of the laser spot.

4. The target simulator according to any one of claims 1-3, characterized in that, The laser illumination module includes an n×n microlens array and a converging mirror. Each microlens is used to transmit a pulsed laser signal containing the position information, energy information and preset distance simulation information of the laser spot. The converging mirror is used to converge the pulsed laser signals transmitted by each microlens to obtain a laser beam containing the position information, energy information and preset distance simulation information of the laser spot.

5. The target simulator according to any one of claims 1-4, characterized in that, The semi-transparent and semi-reflective mirror is a 45° semi-transparent and semi-reflective mirror.

6. A simulation method for a laser imaging target simulator, characterized in that, The method employs any one of the target simulators described in claims 1-5 for simulation, and the method includes: The optical lens receives the laser output from the lidar and projects it onto the semi-transparent mirror. A semi-transparent mirror transmits the laser emitted from the optical lens to the four-quadrant detector; The four-quadrant detector performs photoelectric conversion on the laser transmitted through the semi-transparent and semi-reflective mirror to obtain 2×2 electrical signals; The signal processing module processes the 2×2 electrical signals to obtain n×n electrical signals containing the position and energy information of the laser spot. The multi-channel signal delay module introduces the delay information into n×n electrical signals containing the position information and energy information of the laser spot, respectively, to obtain n×n electrical signals containing the position information, energy information and preset distance simulation information of the laser spot; The laser outputs continuous laser light. The multi-channel electro-optic modulator pulses a continuous laser beam based on n×n electrical signals containing laser spot position information, energy information, and preset distance simulation information, thereby obtaining n×n pulsed laser signals containing laser spot position information, energy information, and preset distance simulation information. The laser illumination module transmits and then converges n×n pulsed laser signals containing the position information, energy information and preset distance simulation information of the laser spot to obtain a laser beam containing the position information, energy information and preset distance simulation information of the laser spot. A semi-transparent mirror reflects a laser beam containing the position information, energy information, and preset distance simulation information of the laser spot to an optical lens; The optical lens receives a laser beam containing the position information, energy information and preset distance simulation information of the laser spot, which is reflected by a semi-transparent and semi-reflective mirror, and then emits it to the lidar.

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