Smart stadium based on arrayed gratings, and information sensing system

Abstract

A smart stadium (100) based on arrayed gratings, and an information sensing system. The smart stadium (100) based on arrayed gratings comprises a foundation layer (10) and a motion contact layer (30), and further comprises an arrayed grating layer (20), wherein the arrayed grating layer (20) is located inside the foundation layer (10), or is located inside the motion contact layer (30), or is located between the foundation layer (10) and the motion contact layer (30); and the arrayed grating layer (20) is used to sense sensing data transmitted by the motion contact layer (30).

Description

A smart stadium and information sensing system based on an array grating Technical Field

[0001] This utility model relates to the field of intelligent sensing technology, and in particular to an intelligent stadium based on an array grating and an information sensing system. Background Technology

[0002] As intelligence, information technology, and technology are increasingly applied to various industries, the sports industry has also seen the emergence of numerous intelligent products, such as smart stadiums and smart running tracks. These smart stadiums and tracks utilize AI, IoT, and cloud computing technologies to capture athletes' postures and provide comprehensive playback. For example, high-speed cameras can capture athletes' movement trajectories and ball trajectories, efficiently restoring real-time scenes, ensuring the accuracy of the game and reducing misjudgments, as seen in VAR technology in football and Hawk-Eye technology in tennis and badminton.

[0003] High-speed cameras can solve problems that require real-time and accurate judgment, such as the ball's landing point and the athlete's crossing the finish line. However, in a stadium, it is also necessary to pay attention to the athlete's training status and the athlete's performance during the game. For example, it is necessary to pay attention to whether a basketball player's pivot foot is the left or right foot, and how much impact a track and field athlete has on the track during running, and how much it affects the athlete's subsequent performance.

[0004] In summary, high-speed cameras can effectively determine the athlete's posture and the ball's landing position through VR, projection, or simulation, but they cannot determine the magnitude of the athlete's impact on the field or the degree of damage the athlete causes to the field, which requires physical contact with the athlete to obtain accurate information.

[0005] Utility Model Content

[0006] In view of this, it is necessary to provide a smart stadium and information sensing system based on an array grating, which can obtain the athlete's motion status and the ball's status by collecting sensing data from the motion contact layer, thereby providing accurate basic data for the athlete's scientific training and competition.

[0007] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0008] In a first aspect, this utility model provides a smart stadium based on an array grating, including a base layer and a motion contact layer, and further including: an array grating layer;

[0009] The array grating layer is located inside the base layer, or inside the motion contact layer, or between the base layer and the motion contact layer;

[0010] The arrayed grating layer is used to sense the sensing data transmitted by the motion contact layer.

[0011] In one possible implementation, the arrayed grating layer is embedded inside the base layer in a horizontal or vertical manner.

[0012] In one possible implementation, the arrayed grating layer is embedded inside the motion contact layer in a horizontal or vertical manner.

[0013] In one possible implementation, the array grating layer is laid or embedded between the base layer and the motion contact layer in a horizontal or vertical manner.

[0014] In one possible implementation, a smart stadium is any of the following: an athletics track, basketball court, tennis court, badminton court, table tennis court, cycling track, skating rink, fitness rink, fencing rink, gymnastics rink, handball court, wrestling rink, and volleyball court.

[0015] In one possible implementation, the arrayed grating layer consists of at least one of the following: a grating array, a fiber grating array, an arrayed fiber grating array, a continuous grating array, a continuous low reflectivity grating, a continuous weak grating array, a weak grating array, or a low reflectivity grating array.

[0016] In one possible implementation, the arrayed grating layer includes a vibrating fiber optic grating cable for sensing vibration data from the moving contact layer.

[0017] In one possible implementation, the arrayed grating layer includes a stress-strain fiber grating cable for sensing stress-strain data from the moving contact layer.

[0018] In one possible implementation, the arrayed grating layer includes a temperature fiber grating cable for sensing temperature data from the moving contact layer.

[0019] Secondly, this utility model also provides an information sensing system, including the aforementioned smart stadium based on an array grating, and a signal demodulation system communicatively connected to the smart stadium. The smart stadium is used to sense the sensing data transmitted by the motion contact layer, and the signal demodulation system determines the sensing information based on the received sensing data and demodulation.

[0020] This invention provides a smart stadium based on an array grating, comprising a base layer and a motion contact layer. The innovation lies in the inclusion of an array grating layer, located either inside the base layer, inside the motion contact layer, or between the base layer and the motion contact layer. The array grating layer is used to sense the sensor data transmitted by the motion contact layer. By collecting sensor information from the motion contact layer, such as vibration, temperature, or stress-strain information, through the array grating layer with fiber optic sensing capabilities, and then demodulating this sensor information, the corresponding athlete's motion state and the ball's landing position on the field are obtained. This allows for the perception of sensor information that cannot be obtained by high-speed cameras, the internet, or cloud computing, thereby improving the intelligence and technological sophistication of the smart stadium. Attached Figure Description

[0021] Figure 1 is a schematic diagram of the structure of the first embodiment of the smart stadium based on array grating provided by this utility model;

[0022] Figure 2 is a partial structural diagram of region A in the array grating layer of the first embodiment of the smart stadium based on array grating provided by this utility model;

[0023] Figure 3 is a schematic diagram of the structure of the second embodiment of the smart stadium based on array grating provided by this utility model;

[0024] Figure 4 is a partial structural diagram of region B in the array grating layer of the second embodiment of the smart stadium based on array grating provided by this utility model;

[0025] Figure 5 is a structural schematic diagram of the third embodiment of the smart stadium based on array grating provided by this utility model;

[0026] Figure 6 is a structural schematic diagram of the fourth embodiment of the smart stadium based on array grating provided by this utility model;

[0027] Figure 7 is a structural schematic diagram of the fifth embodiment of the smart stadium based on array grating provided by this utility model;

[0028] Figure 8 is a structural schematic diagram of the sixth embodiment of the smart stadium based on array grating provided by this utility model;

[0029] Figure 9 is a schematic diagram of an embodiment of an athletics field based on an arrayed grating provided by this utility model.

[0030] Figure 10 is a schematic diagram of a basketball court based on an array grating according to an embodiment of the present invention;

[0031] Figure 11 is a schematic diagram of the structure of a table tennis court based on an array grating provided by this utility model;

[0032] Figure 12 is a structural schematic diagram of an embodiment of a tennis court based on an array grating provided by this utility model;

[0033] Figure 13 is a schematic diagram of the structure of a football field based on an array grating according to the present invention;

[0034] Figure 14 is a system architecture diagram of an embodiment of the information sensing system provided by this utility model. Detailed Implementation

[0035] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0036] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0037] This invention provides a smart stadium and information sensing system based on an array grating, which will be described below.

[0038] In order to collect various data of athletes, especially the impact data of landing and athlete position data caused by contact with the sports field, a specific embodiment of this utility model provides a smart sports field based on an array grating, which includes: a base layer, a sports contact layer, and an array grating layer.

[0039] The array grating layer is located inside the base layer, or inside the motion contact layer, or between the base layer and the motion contact layer;

[0040] The arrayed grating layer is used to sense the sensing data transmitted by the motion contact layer.

[0041] It should be noted that the smart stadium provided in this embodiment of the utility model can be, but is not limited to, an outdoor stadium, an indoor gymnasium, an indoor sports center, an outdoor sports park, etc.

[0042] It is understood that the smart stadium based on array gratings provided in this embodiment of the invention can include athletic tracks and courts, primarily made of materials such as synthetic turf, wood, asphalt, and cement, including athletic tracks, basketball courts, tennis courts, badminton courts, table tennis courts, cycling tracks, skating rinks, fitness areas, fencing venues, gymnastics venues, handball courts, wrestling venues, and volleyball courts. It can be further understood that the sports contact layer is the track layer that directly contacts the athletics in an athletic track, the basketball court surface layer that directly contacts the basketball player in a basketball court, or the court surface layer that directly contacts the tennis ball and the tennis player in a tennis court. These will not be listed in detail here.

[0043] In this embodiment of the invention, the base layer is the subgrade required for laying the stadium, such as commonly used materials like slag, sand, gravel, or asphalt. During the actual subgrade laying, it is necessary to consider excavating the foundation according to the site design elevation and leveling the site, such as using a road roller for compaction. Generally, the road roller should start at a slow speed, compacting straight sections from both sides towards the center, and small-radius curved sections from the inside out.

[0044] In embodiments of this invention, the sports contact layer comprises, from top to bottom, a topcoat layer, a waterproof layer, an elastic layer, and a base coat. The topcoat layer can be a combination of adhesive and rubber granules, which can improve the wear resistance and environmental friendliness of the track. Preferably, the coating thickness is between 1-2 mm. The waterproof layer mainly prevents water accumulation and blistering damage to the track; the waterproof layer generally uses a nano-silicone waterproofing agent. The elastic layer can be a granular elastic layer, composed of several elastic particles, which can be adhered and fixed to the base coat using an adhesive.

[0045] In embodiments of this invention, the array grating layer is primarily composed of array gratings with high-capacity, multi-parameter detection capabilities. In specific implementations, the array grating layer comprises at least one of the following: a grating array, a fiber grating array, an arrayed fiber grating array, a continuous grating array, a continuous low-reflectivity grating, a continuous weak grating array, a weak grating array, or a low-reflectivity grating array. Specifically, the grating array is a continuous grating array fabricated on a large scale using a wire drawing tower, enabling the construction of a high-capacity grating array network. Therefore, during installation, integrated installation and protection of the grating array can be achieved.

[0046] In specific implementations, the arrayed grating layer is mainly used to detect vibration data, temperature data, and stress-strain data. Vibration data is typically detected by laying out vibration arrayed grating fiber optic cables as the arrayed grating layer. Similarly, vibration data, temperature data, and stress-strain data are detected by laying out temperature / stress-strain arrayed grating fiber optic cables as the arrayed grating layer. It should be noted that, generally speaking, vibration arrayed grating fiber optic cables and temperature / stress-strain arrayed grating fiber optic cables differ in their fabrication methods and structures, while temperature arrayed grating fiber optic cables and stress-strain arrayed grating fiber optic cables are quite similar in fabrication and structure due to their shared principles.

[0047] It should be noted that the vibration data collected by the vibration array grating fiber optic cable can include vibration data generated by athletes exercising on the track. For example, the pressure of a sprinter stepping on the contact layer at high speed during a 100-meter sprint will generate corresponding vibration data, as will the impact force of a tennis player's lateral movement. It should also be noted that the generation and acquisition of the above vibration data can be achieved using existing array grating sensing technology.

[0048] It should also be noted that the temperature data collected by the temperature array grating fiber optic cable can be the temperature data of the moving contact layer, such as the temperature data during high temperatures in summer and low temperatures in winter. In specific embodiments, the temperature array grating fiber optic cable is generally used to detect icing, high temperature, or other extreme weather conditions on the runway, and to analyze and determine the temperature data of the moving contact layer by sensing it.

[0049] Similarly, stress-strain array grating fiber optic cables are mainly used to detect stress-strain data of the motion contact layer, such as the pressure exerted on the track by an athlete running, or the pressure exerted on the court by a basketball being dribbled.

[0050] It should be noted that existing technologies can be used to acquire vibration data via vibration array grating fiber optic cables. Similarly, existing technologies can also be used to acquire temperature data and stress-strain data via temperature array grating fiber optic cables and stress-strain array grating fiber optic cables, respectively. In a specific embodiment, the array grating layer includes a vibration fiber grating cable for acquiring vibration data from the moving contact layer. The array grating layer includes a stress-strain fiber grating cable for acquiring stress-strain data from the moving contact layer. The array grating layer includes a temperature fiber grating cable for acquiring temperature data from the moving contact layer.

[0051] In some embodiments of this invention, the array grating layer includes an encoding region layer corresponding to different functional areas of the motion contact layer. Specifically, in an athletic track, such as a 400-meter track, encoding is performed according to the different areas of the track lines (generally nine areas), and then the array grating fiber optic cable is laid according to the different encoded areas. In a specific embodiment, the array grating layer includes array grating optical cables, which are arranged in an array manner. Arranging them in an array manner allows for more accurate acquisition of sensor signals, improving signal acquisition efficiency and operational convenience.

[0052] To accurately illustrate the specific structure of the smart stadium based on array grating provided by this utility model, please refer to Figures 1-8, which will now be described in detail.

[0053] In some embodiments, Figure 1 is a schematic diagram of the structure of a first embodiment of a smart stadium based on an array grating provided by the present invention. In this embodiment, the smart stadium based on the array grating includes a base layer 10, a motion contact layer 30, and an array grating layer 20, and the array grating layer 20 is arranged laterally between the base layer 10 and the motion contact layer 30. In a preferred embodiment, the array grating layer 20 is laid or laid on the upper surface of the base layer 10, and the array grating layer 20 is fully covered by the motion contact layer 30. Specifically, the array grating layer 20 is presented in the form of a sensing optical cable.

[0054] In a specific embodiment, please refer to Figure 2. The gratings of the array grating layer 20 are etched in an array into the optical fiber to form an array grating fiber optic sensing cable. The specific etching and fabrication processes can use existing technologies. By setting the array grating layer 20 laterally between the base layer 10 and the motion contact layer 30, motion information transmitted from the athlete on the motion contact layer can be collected without affecting the basic structure of the base layer 10 and the motion contact layer 30, thereby determining the impact force of the athlete on the sports field, the athlete's movement points during the movement, and the athlete's real-time position.

[0055] In some embodiments, Figure 3 is a schematic diagram of the structure of a second embodiment of a smart stadium based on an array grating provided by the present invention. In this embodiment, the smart stadium based on the array grating includes a base layer 10, a motion contact layer 30, and an array grating layer 20, and the array grating layer 20 is disposed vertically between the base layer 10 and the motion contact layer 30. In a preferred embodiment, the array grating layer 20 is laid or laid on the upper surface of the base layer 10, and the array grating layer 20 is fully covered by the motion contact layer 30. Specifically, the array grating layer 20 is presented in the form of a sensing optical cable.

[0056] In a specific embodiment, please refer to Figure 4. The gratings of the array grating layer 20 are etched in an array into the optical fiber to form an array grating fiber optic sensing cable. The specific etching and fabrication process can use existing technologies. By vertically positioning the array grating layer 20 between the base layer 10 and the motion contact layer 30, motion information transmitted from the athlete on the motion contact layer can be collected without affecting the basic structure of the base layer 10 and the motion contact layer 30. This allows for the determination of the athlete's impact force on the sports field, the athlete's movement points during the movement, and the athlete's real-time position.

[0057] In some embodiments, FIG5 is a structural schematic diagram of a third embodiment of a smart stadium based on an array grating provided by the present invention; FIG6 is a structural schematic diagram of a fourth embodiment of a smart stadium based on an array grating provided by the present invention. Specifically, FIG5 is a structural schematic diagram of the array grating layer 20 embedded in the base layer 10 in a vertical manner, and FIG6 is a structural schematic diagram of the array grating layer embedded in the base layer 10 in a horizontal manner.

[0058] In a specific embodiment, grooves for accommodating optical cables can be set at preset intervals during the base layer 10. After the base layer is laid, the array grating optical cable is placed into these grooves for embedding. Finally, the moving contact layer 30 is laid on top of the array grating optical cable and the base layer. This method effectively protects the array grating optical cable structurally, and the array grating optical cable can also make full contact with the moving contact layer 30, thereby improving the service life of the array grating optical cable while achieving reliable acquisition of sensing information.

[0059] In some embodiments, FIG7 is a structural schematic diagram of a fifth embodiment of a smart stadium based on an array grating provided by the present invention; FIG8 is a structural schematic diagram of a sixth embodiment of a smart stadium based on an array grating provided by the present invention. Specifically, FIG7 is a structural schematic diagram of the array grating layer 20 embedded in the motion contact layer 30 in a vertical manner, and FIG8 is a structural schematic diagram of the array grating layer 20 embedded in the motion contact layer 30 in a horizontal manner.

[0060] In a specific embodiment, during the initial layer 10 base layer laying, after the base layer is laid, the array grating optical cable is laid on the upper surface of the base layer according to a preset position using a mold. Finally, the array grating optical cable is embedded into the moving contact layer by simultaneously removing the mold and laying the moving contact layer 30. This method effectively protects the array grating optical cable structurally, and ensures that the array grating optical cable makes very sufficient contact with the moving contact layer 30, achieving more reliable sensing information without affecting the service life of the array grating optical cable.

[0061] To provide a brief explanation of the working principle of this utility model and to enable those skilled in the art to understand it more quickly, the technical principles of acquiring vibration data, temperature data, and stress-strain data using existing technologies are described below. It should be noted that these technical principles are all existing technologies and are only used to clarify this technical solution.

[0062] Specifically, please refer to Figure 9. Taking an athletic track as an example, vibration array grating optical cables (array grating layer 20) can be laid along different areas of the track (such as 9 areas). The vibration sensing optical cable with patent CN105547455A can be used.

[0063] In one embodiment, the vibration signal is obtained by collecting the vibration of the track layer (i.e., the sports contact layer) as the track athlete runs using the vibration sensing optical cable. The phase change of the vibration signal is obtained through phase modulation, allowing the host computer's phase demodulation system to perform interferometric demodulation on this phase change. This identifies multiple grating positions where the phase change exceeds a phase threshold. The stepping position is then located based on the corresponding upper position of different gratings in the vibration array optical cable, thus determining the stride length of each step and accurately determining the athlete's performance. In practical implementation, the result can be compared with the athlete's performance determined by an external video camera system to arrive at a more accurate result.

[0064] In another embodiment, after collecting the vibration signal of the track and field athlete stepping on the track layer while running, the amplitude of the vibration signal can be analyzed to determine the impact force of each step of the track and field athlete on the track, so as to further analyze the force exertion of the track and field athlete's left and right legs. Furthermore, the force exertion can be compared with the requirements of scientific training to evaluate the track and field athlete's performance or give training suggestions.

[0065] Furthermore, referring to Figure 10, taking a basketball court as an example, a vibration array grating optical cable is laid along the longitudinal direction of the basketball court. Existing vibration sensing optical cables can also be used. In one embodiment, the vibration sensing optical cable collects the vibration signal of a basketball player dribbling the basketball on the court. The phase change of the vibration signal is obtained through phase modulation, allowing the host computer's phase demodulation system to perform interferometric demodulation on this phase change. This identifies multiple grating positions where the phase change exceeds a phase threshold. Based on the upper position corresponding to different gratings in the vibration array grating optical cable, the dribbling position is located, thus determining the number of dribbles and the area of ​​impact, accurately recording the basketball player's dribbling rhythm. In actual implementation, it can also be combined with an external video camera system to collect the basketball player's dribbling movements. Data fusion can simulate and record the basketball player's dribbling, facilitating the analysis of the standardization of the player's basketball techniques.

[0066] In some embodiments, referring to Figure 11, taking a table tennis court as an example, stress-strain array grating optical cables are laid along the horizontal and vertical directions of the table tennis court. Existing stress-strain sensing optical cables, such as the stress-strain optical cable based on an ultra-short weak grating array as described in patent CN208847903U, can also be used. In one embodiment, the stress-strain signal is obtained by collecting the stress-strain data of a table tennis player's footsteps on the table tennis court. The wavelength change of the stress-strain signal is obtained through the influence of stress-strain on the period / wavelength in the optical wavelength modulation principle. This allows the demodulation system of the host computer to demodulate the wavelength change, thereby obtaining the change in stress-strain corresponding to the wavelength. The grating position corresponding to the change exceeding the stress threshold is then used to locate the player's movement position and direction, thus determining the player's trajectory and force application method. In actual implementation, the player's hitting motion can also be collected by an external video camera system. Data fusion can achieve simulated recording of the player's hitting motion, facilitating the analysis of the player's technical and tactical characteristics.

[0067] In some other embodiments, please refer to Figure 12. Taking a tennis court as an example, temperature array grating optical cables are laid along the horizontal and vertical directions of the tennis court. Existing temperature sensing optical cables, such as those composed of fiber Bragg grating temperature sensors as described in patent CN117990228A, can also be used. In one embodiment, the temperature signal is obtained by collecting the temperature of the tennis court through this temperature sensing optical cable. The wavelength change of the temperature signal is obtained through the principle of temperature affecting period / wavelength in optical wavelength modulation. This allows the demodulation system of the host computer to demodulate the wavelength change, thereby obtaining the temperature change corresponding to the wavelength. This allows the temperature change of the tennis court surface (i.e., the sports contact layer 30) to be determined, providing a data basis for the maintenance and upkeep of the tennis court.

[0068] In some embodiments, referring to Figure 13, taking a football field as an example, stress-strain array grating optical cables are laid along the horizontal and vertical directions of the football field. Existing stress-strain sensing optical cables, such as the stress-strain optical cable based on an ultra-short weak grating array as described in patent CN208847903U, can also be used. In one embodiment, the stress-strain signal is obtained by collecting the stress-strain data of the football landing on the football field through this stress-strain sensing optical cable. The wavelength change of the stress-strain signal is obtained through the principle of the influence of stress-strain on period / wavelength in the optical wavelength modulation principle. This allows the demodulation system of the host computer to demodulate the wavelength change, thereby obtaining the change in stress-strain corresponding to the wavelength. The grating position corresponding to the change exceeding a stress threshold is then obtained. Based on the grating position in the stress-strain array grating optical cable corresponding to the change exceeding the stress threshold, the movement position and direction are located, thus determining the football's trajectory and landing angle. In actual implementation, the movement trajectory of the football can also be collected with an external video camera system. Data fusion can achieve simulated recording of the football being kicked, providing a data foundation for football player training.

[0069] In summary, the smart stadium provided by this utility model, based on a base layer and a motion contact layer, further incorporates an array grating layer, which is positioned either inside the base layer, inside the motion contact layer, or between the base layer and the motion contact layer. The array grating layer is used to sense the sensor data transmitted by the motion contact layer. By collecting sensor information from the motion contact layer, such as vibration, temperature, or stress-strain information, through the array grating layer with fiber optic sensing capabilities, and then demodulating this sensor information, the corresponding athlete's motion state and the ball's landing position on the field are obtained. This allows for the perception of sensor information that cannot be obtained by high-speed cameras, the internet, or cloud computing, thereby improving the intelligence and technological sophistication of the smart stadium.

[0070] Secondly, this utility model also provides an information sensing system, as shown in Figure 14, which includes the smart stadium 100 based on the array grating described above, and also includes a signal demodulation system 200 that is communicatively connected to the smart stadium. The smart stadium 100 is used to sense the sensing data transmitted by the motion contact layer, and the signal demodulation system 200 demodulates the sensing data to determine the sensing information.

[0071] It should be noted that after the array grating layer in the smart stadium 100 collects the sensing data transmitted by the motion contact layer, it transmits the signal to the signal demodulation system 200. The signal demodulation system 200 can then demodulate the sensing data and present the demodulated signal for subsequent signal analysis. The signal demodulation system 200 can adopt a conventional fiber optic demodulation system, which is not further limited in this invention, and its functional implementation will not be described in detail.

[0072] In summary, the smart stadium and information sensing system based on array gratings provided by this utility model collects sensing information from the motion contact layer, such as vibration information, temperature information, or stress and strain information, through an array grating layer with fiber optic sensing function. Then, after demodulating these sensing information, the corresponding athlete's motion state is obtained. This system can achieve comprehensive coverage of the motion contact layer, collect data quickly, and obtain accurate data, effectively ensuring the intelligence and technological advancement of the smart stadium.

[0073] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model.

Claims

1. An array grating based smart stadium comprising a base layer and a sports contact layer, characterized in that, Also includes: Array grating layer; The array grating layer is located inside the base layer, or inside the motion contact layer, or between the base layer and the motion contact layer; The arrayed grating layer is used to sense the sensing data transmitted by the motion contact layer.

2. The array-grating-based smart stadium of claim 1, wherein, The array grating layer is embedded inside the base layer in a horizontal or vertical manner.

3. The array-grating-based smart stadium of claim 1, wherein, The array grating layer is embedded inside the motion contact layer in a horizontal or vertical manner.

4. The array-grating-based smart stadium of claim 1, wherein, The array grating layer is laid or embedded between the base layer and the motion contact layer in a horizontal or vertical manner.

5. The array-grating-based smart stadium of claim 1, wherein, The smart stadium is any one of the following: track and field stadium, basketball court, tennis court, badminton court, table tennis court, cycling track, ice skating rink, fitness area, fencing arena, gymnastics arena, handball court, wrestling arena, and volleyball court.

6. The array-grating-based smart stadium of claim 1, wherein, The arrayed grating layer is composed of at least one of the following: grating array, fiber grating array, arrayed fiber grating array, continuous grating array, continuous low reflectivity grating, continuous weak grating array, weak grating array, or low reflectivity grating array.

7. The array-grating-based smart stadium of claim 1, wherein, The array grating layer includes a vibrating fiber optic grating cable for sensing vibration data from the moving contact layer.

8. The array-grating-based smart stadium of claim 1, wherein, The array grating layer includes a stress-strain fiber grating cable for sensing stress-strain data from the moving contact layer.

9. The array-grating-based smart stadium of claim 1, wherein, The array grating layer includes a temperature fiber optic grating cable for sensing temperature data from the moving contact layer.

10. An information sensing system characterized by comprising: The system includes a smart stadium based on an array grating as described in any one of claims 1-9, and further includes a signal demodulation system communicatively connected to the smart stadium. The smart stadium is used to sense the sensing data transmitted by the motion contact layer, and the signal demodulation system determines the sensing information by receiving and demodulating the sensing data.

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