Emergency help signal panoramic projection device, method and terminal

Abstract

The application belongs to the technical field of emergency help equipment, and provides an emergency help signal panoramic projection device, method and terminal, the device can continuously detect the spatial posture and rotating motion state of itself through the environment positioning module, generate corresponding posture data and direction data, the control module can obtain the data and determine the real-time projection pointing angle of the device, and then when the device rotates, the projection control instruction corresponding to the real-time projection pointing angle is generated and sent to the image projection module, so that the image generation unit in the image projection module drives the corresponding rotating transformation of the help image, and the light source in the image projection module irradiates the help image to project the visual help signal which is right and complete. The scheme realizes omnidirectional controllable intelligent projection, can make the help signal cover all directions, at the same time ensures that the projected image can be clearly observed, is more easily identified by the rescuer, reduces the delay caused by signal blur, and improves the probability of being rescued by the help seeker.

Description

Technical Field

[0001] This invention belongs to the field of emergency distress equipment technology, specifically relating to an emergency distress signal panoramic projection device, method and terminal. Background Technology

[0002] In emergency situations such as wilderness exploration, maritime operations, and disaster sites, people in distress often need to send out distress signals by means of light, reflection, or sound to attract the attention of search and rescue personnel. Whether the distress signals sent out by the people in distress can be effectively detected by search and rescue team members, passing vehicles, ships, aircraft, and other potential rescuers is the key to life and death.

[0003] Currently, commonly used distress signals include flashlights, strobe lights, signal mirrors, and pyrotechnic signal sticks. Although these traditional methods are simple and readily available, existing distress signal generating devices generally suffer from problems such as limited signal directionality, poor environmental adaptability, and insufficient signal stability and recognizability under dynamic conditions, exhibiting significant limitations.

[0004] Flashlights or strobe lights can usually only achieve unidirectional and intermittent flashing through manual control. The light signals they emit are highly directional, have limited coverage, and lack a unified standard for flashing patterns. They are difficult to effectively identify and understand at long distances or in complex environments. Signal mirrors and other devices that rely on sunlight are limited by weather and lighting conditions and cannot be used at night or on cloudy days. Fireworks, although highly visible, have the disadvantages of short duration and single-use only, and also pose a risk of causing secondary disasters. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, the present invention proposes a panoramic projection device for emergency distress signals, comprising:

[0006] An environmental positioning module is used to continuously detect the device's own spatial attitude and rotational motion state, and generate corresponding attitude data and orientation data based on the detection results;

[0007] An image projection module, including a light source and an image generation unit, is used to generate a specific distress image through the image generation unit and to project a specific visual distress signal by illuminating the distress image through the light source.

[0008] The control module, connected to the environmental positioning module and the image projection module respectively, is used to respond to emergency distress commands, acquire attitude data and orientation data output by the environmental positioning module, and determine the real-time projection pointing angle of the device in the horizontal plane relative to a preset reference direction based on the attitude data and orientation data. Then, when the device rotates, it generates a projection control command corresponding to the real-time projection pointing angle and sends it to the image projection module to drive the image generation unit to perform corresponding rotation transformation on the distress image and project a visual distress signal that is upright and complete relative to the current device direction.

[0009] Specifically, the environmental positioning module includes an inertial measurement unit consisting of a three-axis gyroscope, a three-axis accelerometer, and a three-axis magnetometer. The inertial measurement unit is used to measure the pitch angle, roll angle, and yaw angle of the device in three-dimensional space in real time. The attitude data is determined based on the pitch angle and the roll angle, and the azimuth data is determined based on the yaw angle.

[0010] The control module is used to determine the real-time rotation angle of the device in the horizontal plane based on the orientation data, and use the real-time rotation angle as the projection pointing angle, and to determine the control parameters for driving the image generation unit to perform corresponding rotation transformation on the distress image based on the attitude data.

[0011] Furthermore, the device also includes:

[0012] A communication module, connected to the control module, is used to establish a data link with an external network to send distress signals to the external network and receive reference calibration data from the external network.

[0013] The control module is also used to dynamically adjust the preset reference direction according to the reference calibration data, so that the preset reference direction is consistent with the preset geographical direction, or consistent with the rescue direction determined based on the reference calibration data.

[0014] Furthermore, the device also includes:

[0015] An audio alarm module, connected to the control module, is used to play preset alarm audio.

[0016] The control module is also used to dynamically generate audio control commands based on the current projection pointing angle to drive the audio alarm module to play alarm audio, and to associate at least one acoustic feature of the alarm audio with the current spatial orientation indicated by the real-time projection pointing angle.

[0017] Preferably, the control module pre-stores a division rule for dividing the horizontal circumference range into multiple consecutive preset directional intervals, as well as acoustic feature data corresponding to each preset directional interval.

[0018] The control module is used to call the corresponding acoustic feature data to generate the audio control command based on the preset azimuth interval corresponding to the current real-time projection pointing angle, so that the alarm audio played has acoustic features associated with the current preset azimuth interval.

[0019] Furthermore, the device also includes:

[0020] A power supply is electrically connected to the control module, the environmental positioning module, the image projection module, and the audio alarm module, respectively, to supply power to each module.

[0021] The control module is also used to monitor the remaining power of the power supply and dynamically adjust the data sampling frequency of the environmental positioning module for detecting the spatial attitude and rotational motion state of the device based on the remaining power.

[0022] Preferably, the device further includes:

[0023] The outer casing has a cavity inside, in which the control module, the environmental positioning module, the image projection module, the audio alarm module, and the power supply are all disposed. The surface of the outer casing is provided with an emergency distress button connected to the control module and a light-transmitting window corresponding to the image generation unit.

[0024] This invention also proposes a panoramic projection method for emergency distress signals, which is implemented based on the panoramic projection device for emergency distress signals described above, and includes:

[0025] In response to an emergency distress call, the device continuously monitors its own spatial attitude and rotational motion state, generates attitude data and orientation data based on the monitoring results, and determines the real-time projection pointing angle of the device relative to a preset reference direction in the horizontal plane based on the attitude data and the orientation data.

[0026] Based on the change in the real-time projection pointing angle, corresponding projection control commands are generated to perform corresponding rotation transformations on the pre-stored distress image;

[0027] The distress image, after being rotated and transformed, is projected onto the external environment to project a visual distress signal that is upright and complete relative to the current device orientation.

[0028] Furthermore, the method also includes:

[0029] In response to an emergency distress call, it sends a distress signal to an external network and receives reference calibration data from the external network;

[0030] The preset reference direction is dynamically adjusted based on the reference calibration data so that the preset reference direction is consistent with the preset geographical direction, or with the rescue direction determined based on the reference calibration data.

[0031] The present invention also proposes a terminal, which includes an emergency distress signal panoramic projection device as described above.

[0032] The present invention has at least the following beneficial effects:

[0033] The solution proposed in this invention fundamentally solves the signal distortion problem that is prone to occur in traditional distress methods. It can achieve stable and clear omnidirectional projection through the user's rotation action, which greatly improves the interpretability and coverage of the signal. The operation method is simple and easy to understand. It can achieve 360-degree omnidirectional signal projection centered on the device, ensuring that passers-by and rescuers can immediately identify the distress information, significantly increasing the probability of the signal being identified, thereby increasing the probability of the user being rescued.

[0034] Furthermore, the solution proposed in this invention can accurately and stably output attitude and orientation data through the measurement device integrated in the environmental positioning module, thereby providing a reliable data foundation for dynamic image compensation. Through the communication module, it can introduce the ability to interact with the outside world, correct the heading of the device, and on this basis, provide more specific orientation guidance for search and rescue personnel.

[0035] Based on this, this solution also implements a multimodal distress call method that combines alarm audio through an audio alarm module. By associating the alarm audio of the audio alarm module with different preset directional ranges, it is easy for users to perceive the current rotation progress of the device, ensuring that visual distress signals can be projected in all directions during the rotation of the device, increasing the probability of being rescued, and providing richer information dimensions to ensure that it is easier for rescuers to identify.

[0036] In addition, this solution provides an intelligent power management scheme for the device's battery life. When the power is low, it can reduce the sampling frequency of the environmental positioning module to ensure the running time of the image projection module and audio alarm module, which are the core of the distress call, thereby extending the device's usability as much as possible. By integrating all modules into the housing to form an independent and portable device, it can protect the internal components from impact damage, improve reliability in harsh environments, and make it easy for users to carry. The light-transmitting window ensures the effective signal output of the image projection module and ensures a smooth light path during signal projection.

[0037] Therefore, this invention proposes an emergency distress signal panoramic projection device, method, and terminal. The proposed solution achieves omnidirectional controllable intelligent projection, enabling distress signals to cover all directions while ensuring that the projected image can be clearly observed from all angles. This improves the visibility and understandability of the signal, making it easier for rescuers to identify. It solves the problem of flickering lights and difficulty in identification when using flashlights, strobe lights, or other objects to call for help in traditional distress methods. It also reduces delays caused by ambiguous signals and significantly increases the probability of rescue for those in distress. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 A state flow diagram of the panoramic projection device for emergency distress signals provided in Example 1;

[0040] Figure 2 A schematic diagram of the module structure of a panoramic projection device for emergency distress signals;

[0041] Figure 3 A flowchart illustrating the panoramic projection method for emergency distress signals provided in Example 2;

[0042] Figure 4 This is a flowchart illustrating a method that includes relocation direction.

[0043] Figure Labels

[0044] 10-Environmental positioning module; 20-Image projection module; 21-Light source; 22-Image generation unit; 30-Control module; 40-Audio alarm module; 50-Communication module. Detailed Implementation

[0045] 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0046] Various embodiments of the invention will be described more fully below. The invention may have various embodiments, and adjustments and changes may be made therein. However, it should be understood that there is no intention to limit the various embodiments of the invention to the specific embodiments disclosed herein, but rather the invention should be understood to cover all modifications, equivalents, and / or alternatives falling within the spirit and scope of the various embodiments of the invention.

[0047] In the following, the terms “comprising” or “may include” as used in various embodiments of the invention indicate the presence of the disclosed functions, operations, or elements, and do not limit the addition of one or more functions, operations, or elements. Furthermore, as used in various embodiments of the invention, the terms “comprising,” “having,” and their cognates are intended only to indicate a specific feature, number, step, operation, element, component, or combination of the foregoing, and should not be construed as primarily excluding the presence of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing, or the possibility of adding one or more combinations of the foregoing.

[0048] In various embodiments of the invention, the expression "or" or "at least one of A and / or B" includes any combination or all combinations of the words listed simultaneously. For example, the expression "A or B" or "at least one of A and / or B" may include A, may include B, or may include both A and B.

[0049] The expressions used in the various embodiments of the present invention (such as "first," "second," etc.) may modify various constituent elements in the various embodiments, but do not limit the corresponding constituent elements. For example, the above expressions do not limit the order and / or importance of the elements. The above expressions are only used for the purpose of distinguishing one element from other elements. For example, a first user device and a second user device refer to different user devices, although both are user devices. For example, a first element may be referred to as a second element without departing from the scope of the various embodiments of the present invention, and similarly, a second element may also be referred to as a first element.

[0050] It should be noted that, in this invention, unless otherwise explicitly specified and defined, terms such as "installation," "connection," and "fixation" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] In this invention, those skilled in the art should understand that the terms indicating orientation or positional relationship in the text are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the purpose of facilitating the description of this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0052] The terminology used in the various embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to limit the various embodiments of the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the invention pertain. The terms (such as those defined in a generally used dictionary) are to be interpreted as having the same meaning as in the context of the relevant technical field and are not to be interpreted as having an idealized or overly formal meaning, unless clearly defined in the various embodiments of the invention.

[0053] Example 1

[0054] Please refer to Figures 1-2 This embodiment proposes an emergency distress signal panoramic projection device. The device combines intelligent posture perception with dynamic image projection compensation, enabling it to activate a panoramic projection mode for distress calls when a user is in danger. By allowing the user to slowly rotate the device, the projected content is automatically adjusted, achieving continuous projection of visual distress signals across an omnidirectional range and ensuring a stable visual image at any instant. This fully utilizes the visual propagation advantages of projection, increasing the probability of rescue for trapped users. The device specifically includes:

[0055] The environmental positioning module 10 is used to continuously detect the device's own spatial attitude and rotational motion state, and generate corresponding attitude data and orientation data based on the detection results.

[0056] The image projection module 20 includes a light source 21 and an image generation unit 22, which is used to generate a specific distress image through the image generation unit 22 and to project a specific visual distress signal by illuminating the distress image through the light source 21. In this embodiment, the image generation unit 22 includes a digital micromirror device. A condenser lens and a collimating lens group are provided between the digital micromirror device and the light source 21 to uniformly project the light beam emitted by the light source 21 onto the digital micromirror device, thereby generating pixel information of the distress image.

[0057] The control module 30 is connected to the environmental positioning module 10 and the image projection module 20 respectively. It is used to respond to emergency distress commands, acquire the attitude data and orientation data output by the environmental positioning module 10, and determine the real-time projection pointing angle of the device in the horizontal plane relative to the preset reference direction based on the attitude data and orientation data. Then, when the device rotates, it generates a projection control command corresponding to the real-time projection pointing angle and sends it to the image projection module 20 to drive the image generation unit 22 to perform corresponding rotation transformation on the distress image and project a visual distress signal that is upright and complete relative to the current device direction. Specifically, the visual distress signal may include, but is not limited to, internationally recognized distress signals such as SOS and HELP.

[0058] Therefore, the device proposed in this embodiment can achieve continuous projection of visual distress signals within a 360-degree horizontal range through simple horizontal rotation by the user. It can maintain the accuracy of signal projection in complex geographical environments, and ensure that the projected signal is always upright and a complete graphical distress signal through attitude detection and correction. This greatly increases the probability that the user's distress signal is observed and ensures that the observer can quickly understand the meaning of the distress call, thereby shortening the rescue response time.

[0059] Specifically, the environmental positioning module 10 includes an inertial measurement unit consisting of a three-axis gyroscope, a three-axis accelerometer, and a three-axis magnetometer. The inertial measurement unit may include a microelectromechanical system chip, which can measure the pitch angle, roll angle, and yaw angle of the device in three-dimensional space in real time. The attitude data is determined based on the pitch angle and roll angle, and the azimuth data is determined based on the yaw angle.

[0060] The control module 30 is used to determine the real-time rotation angle of the device in the horizontal plane based on the orientation data, and to use the real-time rotation angle as the projection pointing angle. It also determines the control parameters for the image generation unit 22 to perform corresponding rotation transformation on the distress image based on the attitude data.

[0061] It should be noted that the three-axis gyroscope can acquire angle changes, and the three-axis accelerometer can use the perception of gravity direction to perform data fusion and drift correction, thereby enabling the device to accurately determine the tilt state of the device relative to the horizontal plane during the device's movement. The three-axis magnetometer can sense the direction of the magnetic field and provide the device with a direction reference in the horizontal plane. The control module 30 can fuse and calculate the acquired data to obtain a stable real-time rotation angle and ensure the accuracy of rotation transformation control, thereby overcoming the shortcomings of the three-axis magnetometer being susceptible to short-term magnetic interference and the three-axis gyroscope having drift.

[0062] In this embodiment, the control module 30 is pre-loaded with an attitude calculation algorithm based on Kalman filtering. It can calibrate and normalize the raw angular velocity, acceleration and magnetic field strength data output by the inertial measurement unit, and perform state estimation on the data through the algorithm, thereby outputting stable pitch angle, roll angle and heading angle information.

[0063] In an optional implementation, the control module 30 can calculate high-precision pitch and roll angles, as well as the heading angle of the device relative to true north, based on the data measured by the inertial measurement unit. The current heading angle is compared with a preset reference direction, and the difference obtained is the real-time projection pointing angle of the device in the horizontal plane relative to the preset reference direction.

[0064] Based on this, the control module 30 can generate corresponding projection control commands according to the real-time projection pointing angle, drive the image generation unit 22 to perform a rotation transformation including reverse compensation on the pre-stored distress image source, so that the projected image appears upright to an external observer. At the same time, the control unit can also correct the image according to the attitude data to compensate for the image distortion caused by the device tilting and the projection not being perpendicular to the optical axis, thereby ensuring that the image projected by the image projection module 20 is as regular as possible.

[0065] In this embodiment, the image correction by the control unit can preferably be based on trapezoidal correction according to perspective transformation. The control module 30 can calculate the spatial geometric relationship between the projection plane and the plane of the image generation unit 22 according to the pitch angle and roll angle, and then perform pre-distortion processing on the distress image through the image processing algorithm, so that when the image is projected through the tilted light path, the presented graphic can be restored to a regular rectangle or a preset standard shape, thereby ensuring its integrity.

[0066] For example, the distress image can be a pre-stored BMP or PNG image, and the initial direction of the distress image source is a preset reference direction. The control module 30 can adjust the direction based on the real-time projection pointing angle. Constructing a two-dimensional rotation matrix :

[0067]

[0068] Among them, the real-time projection pointing angle It can represent the angle between the current device direction and the preset reference direction.

[0069] For each pixel in the distress image Calculate the coordinates after rotation The formula is:

[0070]

[0071]

[0072] in, The x-coordinate represents the center point of the distress image. The vertical coordinates representing the center point of the distress image can be further used by the control module 30 to calculate the pixel values ​​of the new coordinates using an interpolation algorithm to ensure the smoothness of the projected image.

[0073] Control module 30 can be based on pitch angle and roll angle Calculate the projection transformation matrix And based on the projection transformation matrix Perform a perspective transformation on the rotated image to correct the trapezoidal distortion caused by the device tilt, thereby obtaining the corrected pixel coordinates. :in, Represents the scaling factor. Represents the corrected x-coordinate of the pixel. This represents the corrected ordinate of the pixel.

[0074] Furthermore, the apparatus proposed in this embodiment also includes:

[0075] The audio alarm module 40 is connected to the control module 30 and is used to play preset alarm audio.

[0076] The control module 30 is also used to dynamically generate audio control commands based on the current projection pointing angle to drive the audio alarm module 40 to play alarm audio, and to associate at least one acoustic feature of the alarm audio with the current spatial orientation indicated by the real-time projection pointing angle; and / or, to generate audio control commands when the projection pointing angle enters another preset orientation range to drive the audio alarm module 40 to play a synchronized prompt tone.

[0077] Preferably, the control module 30 pre-stores the division rules for dividing the horizontal circumference range into multiple consecutive preset azimuth intervals and the acoustic feature data corresponding to each preset azimuth interval. Thus, the control module 30 can call the corresponding acoustic feature data to generate audio control commands according to the preset azimuth interval corresponding to the current real-time projection pointing angle, so that the alarm audio played has acoustic features associated with the current corresponding preset azimuth interval.

[0078] In an optional implementation, the device stores a division rule that divides the horizontal circumference into 8 preset azimuth intervals, each interval spanning 45 degrees. The control module 30 can select from the pre-stored WAV format audio samples according to the preset azimuth interval corresponding to the real-time projection pointing angle, thereby driving the built-in speaker of the audio alarm module 40 to play the corresponding alarm audio.

[0079] For example, the control module 30 pre-establishes an audio mapping table corresponding to different directional ranges, so that when the device is pointed to the first directional range, the audio alarm module 40 is controlled to play a high-frequency buzzer audio, and when the device is pointed to the second directional range, the audio alarm module 40 is controlled to play a medium-frequency pulse audio.

[0080] Therefore, when the user cannot accurately perceive the direction, the current visual signal projection direction can be confirmed by the alarm audio played by the audio alarm module 40, thereby ensuring that visual distress signals can be projected in the directions corresponding to each preset azimuth interval during the rotation of the device, increasing the probability of being rescued; optionally, when the projection pointing angle moves from one preset azimuth interval to another preset azimuth interval, the audio alarm module 40 can also trigger a synchronous prompt sound to help the user perceive the current rotation progress of the device.

[0081] Furthermore, the apparatus proposed in this embodiment also includes:

[0082] The communication module 50 and the connection control module 30 are used to establish a data link with the external network to send distress signals to the external network and receive reference calibration data from the external network.

[0083] The control module 30 is also used to dynamically adjust the preset reference direction according to the reference calibration data so that the preset reference direction is consistent with the preset geographical direction, or consistent with the rescue direction determined based on the reference calibration data, so that the device proposed in this embodiment can realize the directional enhancement projection of the device; in this embodiment, the preset geographical direction is set to due north by default, or it can be a geographical direction determined by the user in advance calibration.

[0084] For example, when the rescue direction determined based on the reference calibration data is due east, the control module 30 can adjust the preset reference direction to due east, thereby determining the projection pointing angle based on the due east direction as the reference 0 degrees. Thus, the device proposed in this embodiment can achieve directional enhancement projection when the device is pointing due east, ensuring that the probability of being discovered by rescuers from the due east direction can be increased.

[0085] Furthermore, the apparatus proposed in this embodiment also includes:

[0086] The power supply is electrically connected to the control module 30, the environmental positioning module 10, the image projection module 20 and the audio alarm module 40 respectively, and is used to supply power to each module.

[0087] The outer casing has a cavity inside, in which the control module 30, environmental positioning module 10, image projection module 20, audio alarm module 40, and power supply are all housed. The outer casing surface has an emergency distress button connected to the control module 30 and a light-transmitting window corresponding to the image generation unit 22. Preferably, the light-transmitting window can be made of a material with high light transmittance, wear resistance, and water resistance, and can adopt a Fresnel lens structure to expand the projection field of view.

[0088] The control module 30 can also monitor the remaining power of the power supply and dynamically adjust the data sampling frequency of the environmental positioning module 10 to detect the spatial attitude and rotational motion state of the device.

[0089] In an optional implementation, the control module 30 can implement a hierarchical management strategy by monitoring the remaining power of the power supply. For example, when the power is greater than 30%, the environmental positioning module 10 samples at a frequency of 100Hz to ensure the high dynamic response of the device; when the power is in the range of 15%-30%, the sampling frequency of the environmental positioning module 10 is reduced to 50Hz; and when the power is less than 15%, the control module 30 can further reduce the sampling frequency of the environmental positioning module 10 and change the image projection module 20 to project a visual distress signal for 10 seconds once per minute to extend the usage time of the device as much as possible.

[0090] Example 2

[0091] Please refer to Figures 3-4 This embodiment proposes a panoramic projection method for emergency distress signals. The method proposed in this embodiment is based on the panoramic projection device for emergency distress signals proposed in Embodiment 1, and specifically includes:

[0092] S100: In response to an emergency distress call, the device continuously monitors its spatial attitude and rotational motion state through the environmental positioning module, generates attitude data and orientation data based on the monitoring results, and enables the control device to determine the real-time projection pointing angle of the device relative to a preset reference direction in the horizontal plane based on the attitude data and orientation data.

[0093] In this embodiment, the emergency distress call command in step S100 can be triggered by the emergency distress call button provided on the surface of the device.

[0094] S200: Generates corresponding projection control commands based on the real-time changes in the projection pointing angle to drive the image generation unit to perform corresponding rotation transformations on the pre-stored distress image.

[0095] Specifically, the real-time projection pointing angle is determined by data measured by an inertial measurement unit including a three-axis gyroscope, a three-axis accelerometer, and a three-axis magnetometer. The inertial measurement unit can measure the pitch angle, roll angle, and yaw angle of the device in three-dimensional space in real time. The attitude data is determined based on the pitch angle and roll angle, and the azimuth data is determined based on the yaw angle.

[0096] The control module can determine the real-time rotation angle of the device in the horizontal plane based on the orientation data, and use the real-time rotation angle as the projection pointing angle. It can also determine the control parameters for driving the image generation unit to perform corresponding rotation transformations on the distress image based on the attitude data.

[0097] Furthermore, the control unit can correct the image based on the attitude data to compensate for the image distortion caused by the tilt of the device, which results in the projection not being perpendicular to the optical axis. This ensures that the image projected by the image projection module is as regular as possible. In this embodiment, the image correction can preferably be based on trapezoidal correction using perspective transformation. The control module can calculate the spatial geometric relationship between the projection surface and the plane of the image generation unit based on the pitch angle and roll angle. Then, it can perform pre-distortion processing on the distress image through an image processing algorithm, so that when the image is projected through a tilted optical path, the presented graphic can be restored to a regular rectangle or a preset standard shape, thereby ensuring its integrity.

[0098] S300: By illuminating a rotated distress image with a light source, a visual distress signal that is upright and complete relative to the direction of the current device is projected onto the external environment.

[0099] It should be noted that the change in the real-time projection pointing angle in step S200 is caused by the user performing a horizontal rotation operation on the device. After the user rotates the device, the device can continuously project visual distress signals within a 360-degree horizontal range and ensure that the projected visual distress signals are upright and complete relative to the current device direction.

[0100] Preferably, the method proposed in this embodiment can also dynamically generate audio control commands based on the current projection pointing angle to drive the audio alarm module to play alarm audio, and associate at least one acoustic feature of the alarm audio with the current spatial orientation indicated by the real-time projection pointing angle; and / or, generate audio control commands when the projection pointing angle enters another preset orientation range to drive the audio alarm module to play a synchronized prompt tone.

[0101] Furthermore, the method proposed in this embodiment also includes:

[0102] S400: In response to an emergency distress call, it sends a distress signal to an external network via the communication module and receives reference calibration data from the external network.

[0103] S500: Dynamically adjust the preset reference direction based on the reference calibration data to ensure that the preset reference direction is consistent with the preset geographical direction, or with the rescue direction determined based on the reference calibration data.

[0104] In this embodiment, the preset geographical direction is set to due north by default, but it can also be a geographical direction determined by the user in advance.

[0105] Example 3

[0106] This embodiment also proposes a terminal, which includes the emergency distress signal panoramic projection device proposed in Embodiment 1, and can realize the emergency distress signal panoramic projection method proposed in Embodiment 2.

[0107] The terminal may include, but is not limited to, emergency signal lights, smart safety helmets, and emergency rescue beacons. For example, emergency signal lights may be integrated into portable handheld devices such as smartphones, which are suitable for scenarios such as wilderness exploration and mountaineering, and allow users to easily project omnidirectional panoramic distress signals by rotating the handheld device.

[0108] In summary, this invention proposes a panoramic projection device, method, and terminal for emergency distress signals. The proposed solution achieves omnidirectional and controllable intelligent projection, enabling distress signals to cover all directions while ensuring that the projected image can be clearly observed from all angles. This improves the visibility and understandability of the signal, making it easier for rescuers to identify. It solves the problem of flickering and difficult-to-identify lights when using flashlights, strobe lights, or other objects to call for help in traditional methods, reducing delays caused by ambiguous signals and significantly increasing the probability of rescue for those in distress.

[0109] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A panoramic projection device for emergency distress signals, characterized in that, include: An environmental positioning module is used to continuously detect the device's own spatial attitude and rotational motion state, and generate corresponding attitude data and orientation data based on the detection results; An image projection module, including a light source and an image generation unit, is used to generate a specific distress image through the image generation unit and to project a specific visual distress signal by illuminating the distress image through the light source. The control module, connected to the environmental positioning module and the image projection module respectively, is used to respond to emergency distress commands, acquire attitude data and orientation data output by the environmental positioning module, and determine the real-time projection pointing angle of the device in the horizontal plane relative to a preset reference direction based on the attitude data and orientation data. Then, when the device rotates, it generates a projection control command corresponding to the real-time projection pointing angle and sends it to the image projection module to drive the image generation unit to perform corresponding rotation transformation on the distress image and project a visual distress signal that is upright and complete relative to the current device direction.

2. The panoramic projection device for emergency distress signals according to claim 1, characterized in that, The environmental positioning module includes an inertial measurement unit consisting of a three-axis gyroscope, a three-axis accelerometer, and a three-axis magnetometer. The inertial measurement unit is used to measure the pitch angle, roll angle, and yaw angle of the device in three-dimensional space in real time. The attitude data is determined based on the pitch angle and the roll angle, and the azimuth data is determined based on the yaw angle. The control module is used to determine the real-time rotation angle of the device in the horizontal plane based on the orientation data, and use the real-time rotation angle as the projection pointing angle, and to determine the control parameters for driving the image generation unit to perform corresponding rotation transformation on the distress image based on the attitude data.

3. The panoramic projection device for emergency distress signals according to claim 1 or 2, characterized in that, Also includes: A communication module, connected to the control module, is used to establish a data link with an external network to send distress signals to the external network and receive reference calibration data from the external network. The control module is also used to dynamically adjust the preset reference direction according to the reference calibration data, so that the preset reference direction is consistent with the preset geographical direction, or consistent with the rescue direction determined based on the reference calibration data.

4. The panoramic projection device for emergency distress signals according to claim 1, characterized in that, Also includes: An audio alarm module, connected to the control module, is used to play preset alarm audio. The control module is also used to dynamically generate audio control commands based on the current projection pointing angle to drive the audio alarm module to play alarm audio, and to associate at least one acoustic feature of the alarm audio with the current spatial orientation indicated by the real-time projection pointing angle.

5. The panoramic projection device for emergency distress signals according to claim 4, characterized in that, The control module pre-stores a division rule for dividing the horizontal circumference range into multiple consecutive preset directional intervals, as well as acoustic feature data corresponding to each preset directional interval. The control module is used to call the corresponding acoustic feature data to generate the audio control command based on the preset azimuth interval corresponding to the current real-time projection pointing angle, so that the alarm audio played has acoustic features associated with the current preset azimuth interval.

6. The panoramic projection device for emergency distress signals according to claim 4 or 5, characterized in that, Also includes: A power supply is electrically connected to the control module, the environmental positioning module, the image projection module, and the audio alarm module, respectively, to supply power to each module. The control module is also used to monitor the remaining power of the power supply and dynamically adjust the data sampling frequency of the environmental positioning module for detecting the spatial attitude and rotational motion state of the device based on the remaining power.

7. The panoramic projection device for emergency distress signals according to claim 6, characterized in that, Also includes: The outer casing has a cavity inside, in which the control module, the environmental positioning module, the image projection module, the audio alarm module, and the power supply are all disposed. The surface of the outer casing is provided with an emergency distress button connected to the control module and a light-transmitting window corresponding to the image generation unit.

8. A method for panoramic projection of emergency distress signals, characterized in that, Based on the panoramic projection device for emergency distress signals as described in any one of claims 1-7, the method includes: In response to an emergency distress call, the device continuously monitors its own spatial attitude and rotational motion state, generates attitude data and orientation data based on the monitoring results, and determines the real-time projection pointing angle of the device relative to a preset reference direction in the horizontal plane based on the attitude data and the orientation data. Based on the change in the real-time projection pointing angle, corresponding projection control commands are generated to perform corresponding rotation transformations on the pre-stored distress image; The distress image, after being rotated and transformed, is projected onto the external environment to project a visual distress signal that is upright and complete relative to the current device orientation.

9. The panoramic projection method for emergency distress signals according to claim 8, characterized in that, The method further includes: In response to an emergency distress call, it sends a distress signal to an external network and receives reference calibration data from the external network; The preset reference direction is dynamically adjusted based on the reference calibration data so that the preset reference direction is consistent with the preset geographical direction, or with the rescue direction determined based on the reference calibration data.

10. A terminal, characterized in that, Includes the panoramic projection device for emergency distress signals as described in any one of claims 1-7.

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