All-sky-domain light field simulation and interference simulation device and method based on polarization vector modulation

Abstract

The invention discloses an all-sky light field simulation and interference simulation device and method based on polarization vector modulation, and relates to the polarization navigation simulation technology, and the device comprises a main body frame which is of a multi-layer structure; the light field vector modulator is arranged at the upper part of the main body frame and is used for generating a corresponding polarized light field according to the light field information; the multi-source interference environment simulation cabin is mounted on the main body frame and is arranged below the light field vector modulator in parallel; the horizontal reference platform is arranged below the multi-source interference environment simulation cabin in parallel based on the main body frame; the lifting end of the lifting elevation adjusting servo system is connected with the light field vector modulator; the light field information simulation computer is in communication connection with the light field vector modulator; and the remote atmospheric light field acquisition unit is arranged in the outdoor natural environment and sends the acquired data to the light field vector modulator. According to the embodiment of the invention, an all-sky light field in a natural environment can be simulated, and real interference can be simulated and loaded.

Description

Technical Field

[0001] This application relates to the field of polarization navigation simulation technology, and in particular to a device and method for full-sky optical field simulation and interference simulation based on polarization vector modulation. Background Technology

[0002] Polarized light navigation is a novel navigation method that acquires navigation information by detecting the polarization field patterns of the sky, offering advantages such as autonomy and zero cumulative error. This concept is inspired by organisms in nature, many of which can perceive the spatiotemporal distribution patterns of polarized light fields, providing them with orientation and position information for their activities. The accuracy of polarized navigation primarily depends on the establishment of an atmospheric polarized light field model. A common atmospheric polarization model is the single Rayleigh scattering model, which states that the polarization vector and the solar vector strictly satisfy a perpendicular relationship. This assumption simplifies the formula for extracting navigation information and is beneficial for practical applications. However, in reality, in environments such as water, fog, and waves, the transmission of ideal atmospheric polarized light is subject to many interferences, causing the polarization E vector to no longer be perpendicular to the solar vector, significantly affecting the accuracy of heading angle calculation. Therefore, it is necessary to establish a polarization non-perpendicularity error model under multi-source interference.

[0003] Because interference in complex atmospheric environments can only be described qualitatively and is difficult to analyze quantitatively, it is necessary to establish a full-sky polarization light field and multi-source interference simulator. However, existing polarization navigation simulation systems mainly rely on digital simulation. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this application provides a device and method for full-sky optical field simulation and interference simulation based on polarization vector modulation.

[0005] This application provides a full-sky optical field simulation and interference simulation device based on polarization vector modulation, including: The main framework is a multi-layered structure; An optical field vector modulator is located at the upper part of the main frame and is used to generate a corresponding polarized optical field based on the optical field information. A multi-source interference environment simulation chamber is installed on the main frame and arranged parallel to the light field vector modulator below it to simulate the required environment; A horizontal reference platform is set parallel to the main frame below the multi-source interference environment simulation chamber; The elevation adjustment servo system has its lifting end connected to the optical field vector modulator to adjust the distance between the optical field vector modulator and the multi-source interference environment simulation chamber. A light field information simulation computer is communicatively connected to the light field vector modulator. The remote atmospheric light field acquisition unit is set up in an outdoor natural environment and sends the acquired data to the light field vector modulator.

[0006] This application provides a method for full-sky optical field simulation and interference simulation based on polarization vector modulation, characterized in that it is implemented based on the aforementioned device, including: The computer controls the construction of a full-sky polarization navigation light field simulation model and generates light field data; or, the remote atmospheric light field acquisition unit collects sky polarization light field data and transmits the light field data to the light field vector modulator. The polarization state of the output light of each pixel is adjusted according to the light field information, using the light field data as the input of the light field vector modulator. As needed, the elevation adjustment servo system is controlled to adjust the distance between the optical field vector modulator and the multi-source interference environment simulation chamber. The required environment is simulated using a multi-source interference environment simulation chamber. The polarized light output from the optical field vector modulator is propagated to a horizontal reference platform, and the signal is collected using a polarization sensor on the platform.

[0007] The embodiments of this application are capable of simulating the entire sky light field in the natural environment and simulating and loading real interference.

[0008] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0009] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of the structure of the all-sky light field simulation and interference simulation device according to an embodiment of this application; Figure 2 This is a schematic diagram of the optical field vector modulator structure of the all-sky optical field simulation and interference simulation device according to an embodiment of this application; Figure 3 This is a schematic diagram of the elevation adjustment servo system of the all-sky light field simulation and interference simulation device according to an embodiment of this application; Figure 4 This is a schematic diagram of the multi-source interference environment simulation chamber structure of the all-sky light field simulation and interference simulation device according to an embodiment of this application; Figure 5This is a flowchart illustrating the full-sky light field simulation and interference simulation method according to an embodiment of this application. Detailed Implementation

[0010] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0011] This application provides a full-sky optical field simulation and interference simulation device based on polarization vector modulation, such as... Figure 1 As shown, it includes: The main framework is a multi-layered structure; The light field vector modulator 2, located at the upper part of the main frame, is used to generate a corresponding polarized light field based on the light field information. In a specific example, the light field vector modulator 2 is located at the top of the system. It can select simulated light field information from the control computer as the input signal, or it can select atmospheric light field data collected by a remote data acquisition unit as the input signal, and generate a corresponding polarized light field based on the light field information.

[0012] The multi-source interference environment simulation chamber 1 is installed on the main frame and arranged parallel to the optical field vector modulator 2 below it, for simulating the required environment. The multi-source interference environment simulation chamber 1, installed parallel to the optical field vector modulator 2 below it, can be filled with fluids of different types and concentrations to simulate environments such as water, fog, and waves.

[0013] A horizontal reference platform 9 is positioned parallel to the main frame and below the multi-source interference environment simulation chamber 1. Specifically, the horizontal reference platform 9, installed parallel to the multi-source interference environment simulation chamber 1, allows for the placement of polarization sensors to receive polarized light field information.

[0014] The elevation adjustment servo system 7 has its lifting end connected to the optical field vector modulator 2 to adjust the distance between the optical field vector modulator 2 and the multi-source interference environment simulation chamber 1. Figure 1 As shown, the elevation adjustment servo system 7 is installed on the side of the optical field vector modulator and supported on the ground. The light field information simulation computer 14 is communicatively connected to the light field vector modulator 2; The remote atmospheric light field acquisition unit 13 is set up in an outdoor natural environment and sends the acquired data to the light field vector modulator 2.

[0015] In some embodiments, such as Figure 1As shown, the main frame has a windowed box structure at the bottom to house the light field vector modulator 2; The main frame has four corner fixed bosses 4, which are connected to the middle layer 6 and the upper fixed plate 3 of the main frame via an optical axis 5 passing through the bosses. The middle part of the optical axis 5 is connected to the lifting height adjustment servo system 7. The fixed end of the elevation adjustment servo system 7 is connected to the lower layer 8 of the support of the main frame.

[0016] In some embodiments, a remote data transmission unit 12 is further included, which is communicatively connected to a remote atmospheric light field acquisition unit 13 to send the data acquired by the remote atmospheric light field acquisition unit 13 to the light field vector modulator 2.

[0017] In some embodiments, such as Figure 2 As shown, the light field vector modulator 2 includes a natural light source layer 16, a polarizing film layer 17, a light vector deflection layer 18, and a protective layer 19 arranged in sequence. The optical field vector modulator 2 also includes an optical vector deflection voltage control device 20.

[0018] In some embodiments, such as Figure 3 As shown, it also includes a drive motor 23. The output end of the drive motor 23 is connected to the lifting height adjustment servo system 7. The drive motor 23 is connected to the driver 22 via a signal line. The driver 22 is used to receive control commands from the controller 21 to drive the drive motor 23.

[0019] In some embodiments, such as Figure 4 As shown, the multi-source interference environment simulation chamber 1 has windows at the top and bottom, which are transparent and sealed, such as by glass. Its side walls are provided with input holes 15 and output holes.

[0020] This application embodiment can simulate the entire sky-wide light field in the natural environment and simulate and load real interference. The working principle of the device in this application embodiment is as follows: the light field vector modulator 2 adjusts the polarization state of the output light of each pixel according to the entire sky-wide polarization navigation light field data generated by the control computer or the atmospheric light field data collected by the remote data acquisition unit, thereby generating a polarized light field. The multi-source interference environment simulation chamber 1 can be filled with fluids of different types and concentrations to simulate environments such as water, fog, and waves. After the polarized light is refracted, reflected, and scattered by fluid molecules, its polarization mode is affected by multi-source interference, and the polarization state changes. This is collected by the polarization sensor placed on a precision horizontal reference platform, thereby realizing the quantitative analysis of polarization navigation non-perpendicular error under multi-source interference such as water, fog, and waves. This is beneficial for the construction of the polarization non-perpendicular error model and improves the adaptability of the polarization navigation system in complex environments.

[0021] This application also proposes a method for full-sky optical field simulation and interference simulation based on polarization vector modulation, implemented using the aforementioned device, such as... Figure 5 As shown, it includes: The computer controls the construction of a full-sky polarization navigation light field simulation model and generates light field data; or, the remote atmospheric light field acquisition unit collects sky polarization light field data and transmits the light field data to the light field vector modulator. The polarization state of the output light of each pixel is adjusted according to the light field information, using the light field data as the input of the light field vector modulator. As needed, the elevation adjustment servo system is controlled to adjust the distance between the optical field vector modulator and the multi-source interference environment simulation chamber. The required environment is simulated using a multi-source interference environment simulation chamber. The polarized light output from the optical field vector modulator is propagated to a horizontal reference platform, and the signal is collected using a polarization sensor on the platform.

[0022] In a specific example, the polarization vector modulation-based all-sky light field simulation and interference simulation device of this application has two working modes: a computer simulation of natural light field working mode and a real-time transmission of natural light field working mode, wherein: The implementation steps for computer simulation of natural light field working mode include: The control computer constructs a full-sky polarization navigation optical field simulation model, generates optical field data, and transmits it to the optical field vector modulator via cable. The optical field vector modulator selects the optical field information calculated by the control computer based on the model as the input signal, and adjusts the polarization state of the output light of each pixel according to the optical field information; The input signal for the elevation adjustment servo system comes from a remote controller. The experimenter adjusts the distance between the light field vector modulator and the multi-source interference environment simulation chamber according to the experimental requirements. The multi-source interference environment simulation chamber inputs fluids of different types and concentrations through the left input port to simulate environments such as water, fog, and waves. After being refracted, reflected, and scattered by fluid molecules, the polarization mode of polarized light is affected by multi-source interference, and its polarization state changes. Polarized light from the multi-source interference environment simulation chamber propagates to a precision horizontal reference platform, where it is collected by a polarization sensor placed on the platform.

[0023] The implementation steps for the real-time transmission mode of natural light field include: The remote atmospheric light field acquisition unit collects sky polarized light field information in real time and transmits the light field information to the light field vector modulator through the remote data transmission unit; The optical field vector modulator selects the optical field information of the remote acquisition unit as the input signal and adjusts the polarization state of the output light of each pixel according to the optical field information; The input signal for the elevation adjustment servo system comes from a remote controller. The experimenter adjusts the distance between the light field vector modulator and the multi-source interference environment simulation chamber according to the experimental requirements. The multi-source interference environment simulation chamber inputs fluids of different types and concentrations through the left input port to simulate environments such as water, fog, and waves. After being refracted, reflected, and scattered by fluid molecules, the polarization mode of polarized light is affected by multi-source interference, and its polarization state changes. Polarized light from the multi-source interference environment simulation chamber propagates to a precision horizontal reference platform, where it is collected by a polarization sensor placed on the platform.

[0024] Multi-source interference simulation can be performed in the following ways: In the case of simulated water interference, a clean water source or a water source with a certain concentration of particulate matter is placed in a multi-source interference environment simulation chamber. At this time, the polarized light field generated by the optical field vector modulator passes through the multi-source interference environment simulation chamber, and the polarization angle and degree of polarization of the polarized light are changed by the interference of water. The polarization acquisition device collects the signal after interference and analyzes and processes it.

[0025] In the case of simulated fog interference, fog generated by an ultrasonic water mist generator is injected into the multi-source interference environment simulation chamber. At this time, the polarized light field generated by the optical field vector modulator passes through the multi-source interference environment simulation chamber, and the polarization angle and degree of polarization of the polarized light are changed by the interference of the fog. The polarization acquisition device collects the signal after interference and performs analysis and processing.

[0026] In the case of simulated wave interference, a wave generator is placed in a multi-source interference environment simulation chamber to generate waves with a fixed frequency. At this time, the polarized light field generated by the optical field vector modulator passes through the multi-source interference environment simulation chamber, and the polarization angle and degree of polarization of the polarized light are changed by the interference of the waves. The polarization acquisition device collects the signal after interference and performs analysis and processing.

[0027] It should be noted that, in the embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0028] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0029] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0030] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims. All of these forms are within the protection scope of this application.

Claims

1. A full-sky optical field simulation and interference simulation device based on polarization vector modulation, characterized in that, include: The main framework is a multi-layered structure; An optical field vector modulator (2) is disposed at the upper part of the main frame and is used to generate a corresponding polarized optical field based on the optical field information. A multi-source interference environment simulation chamber (1) is installed on the main frame and arranged in parallel below the optical field vector modulator (2) to simulate the required environment; A horizontal reference platform (9) is set in parallel below the multi-source interference environment simulation chamber (1) based on the main frame; The elevation adjustment servo system (7) is connected to the light field vector modulator (2) at the lifting end to adjust the distance between the light field vector modulator (2) and the multi-source interference environment simulation cabin (1); The light field information simulation computer (14) is communicatively connected to the light field vector modulator (2); The remote atmospheric light field acquisition unit (13) is set up in the outdoor natural environment and sends the acquired data to the light field vector modulator (2).

2. The all-sky optical field simulation and interference simulation device based on polarization vector modulation as described in claim 1, characterized in that, The main frame has a windowed box structure at the bottom to house the light field vector modulator (2); The main frame has four corner fixed bosses (4) on its outer frame. The optical axis (5) passes through the bosses and connects to the middle layer (6) of the main frame bracket and the upper fixed plate (3). The middle part of the optical axis (5) is connected to the lifting height adjustment servo system (7). The fixed end of the elevation adjustment servo system (7) is connected to the lower layer (8) of the support of the main frame.

3. The all-sky optical field simulation and interference simulation device based on polarization vector modulation as described in claim 1, characterized in that, It also includes a remote data transmission unit (12), which is communicatively connected to the remote atmospheric light field acquisition unit (13) to send the data acquired by the remote atmospheric light field acquisition unit (13) to the light field vector modulator (2).

4. The all-sky optical field simulation and interference simulation device based on polarization vector modulation as described in claim 1, characterized in that, The light field vector modulator (2) includes a natural light source layer, a polarizing film layer, a light vector deflection layer, and a protective layer arranged in sequence; The optical field vector modulator (2) also includes an optical vector deflection voltage control device.

5. The all-sky optical field simulation and interference simulation device based on polarization vector modulation as described in claim 1, characterized in that, It also includes a drive motor (23), the output end of which is connected to the lifting height adjustment servo system (7). The drive motor (23) is connected to the driver (22) via a signal line. The driver (22) is used to receive control commands from the controller (21) to drive the drive motor (23).

6. The all-sky optical field simulation and interference simulation device based on polarization vector modulation as described in claim 1, characterized in that, The multi-source interference environment simulation chamber (1) has windows at the top and bottom, is transparent and sealed, and has an input hole (15) and an output hole on its side wall.

7. A method for full-sky optical field simulation and interference simulation based on polarization vector modulation, characterized in that, Implemented based on the apparatus as described in any one of claims 1-6, comprising: The computer controls the construction of a full-sky polarization navigation light field simulation model and generates light field data; or, the remote atmospheric light field acquisition unit collects sky polarization light field data and transmits the light field data to the light field vector modulator. The polarization state of the output light of each pixel is adjusted according to the light field information, using the light field data as the input of the light field vector modulator. As needed, the elevation adjustment servo system is controlled to adjust the distance between the optical field vector modulator and the multi-source interference environment simulation chamber. The required environment is simulated using a multi-source interference environment simulation chamber. The polarized light output from the optical field vector modulator is propagated to a horizontal reference platform, and the signal is collected using a polarization sensor on the platform.

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