An electrophysiological signal driven bouquet morphology adaptive artistic rendering device

Abstract

The application relates to the technical field of intelligent artistic devices, in particular to a flower bouquet form adaptive artistic presentation device driven by electrophysiological signals, which comprises a base structure, a plant signal acquisition module, a visual recognition module, a flower bouquet driving mechanism, a particle display system and an audio interaction module. The device controls the unfolding form of the petal skeleton, the particle dynamics on the transparent curved screen and the surround audio effect in cooperation by acquiring the plant electrophysiological signals and combining the audience number grades recognized by AI vision, so that the deep fusion of multi-modal perception and artistic expression is realized. The application can improve the dynamic precision and environmental adaptability of the flower bouquet form response, and solves the problem that biological signals and audience behaviors lack cooperative control in the prior art.

Description

Technical Field

[0001] This invention belongs to the field of human-computer interaction and intelligent art installation technology, specifically an electrophysiological signal-driven flower bouquet shape adaptive art presentation device. Background Technology

[0002] In recent years, with the integration of biosignal sensing technology and interactive art, art installations utilizing plant electrophysiological signals as a creative medium have gradually gained attention. Existing technologies include interactive systems that collect plant electrical signals through sensors and convert them into visual or auditory outputs. For example, electrical signals can be mapped onto dynamic graphics, lighting changes, or sound parameters on a screen to artistically express the "physiological state" of plants. Some installations also attempt to incorporate environmental sensing modules, such as infrared or camera devices, to identify the presence of people or viewers and adjust the output accordingly.

[0003] However, most current devices present information in a relatively fixed manner, typically mapping plant electrical signals unidirectionally to preset visual or audio effects, lacking a dynamic adjustment mechanism for the display format. Particularly in terms of adaptive responses based on audience participation, there is a lack of concrete implementations for multimodal collaborative control of AI visual recognition results with plant electrical signal-driven visual forms (such as the tightening and unfolding of a bouquet) and audio feedback. Furthermore, existing systems still have room for further optimization in integrating real-time linkage between plant electrical signals, audience behavior recognition, and multi-sensory outputs (visual particle systems and audio modules). Summary of the Invention

[0004] The main objective of this invention is to propose an electrophysiological signal-driven adaptive art presentation device for bouquet shapes, aiming to solve the technical problems in related technologies such as the lack of a multimodal collaborative control mechanism between plant electrical signals and audience behavioral perception, the sluggish response to changes in bouquet shapes, and the inability to achieve dynamic precision adjustment.

[0005] To achieve the above objectives, according to some embodiments of the present invention, the present invention provides an electrophysiological signal-driven adaptive art presentation device for bouquet morphology, comprising: a base structure; a plant signal acquisition module, wherein the plant signal acquisition module is fixedly installed on the base structure, the plant signal acquisition module includes at least one pair of electrode clamping members and a signal conditioning circuit board, the electrode clamping members are used to clamp plant stems to obtain their surface potential differences, and the signal conditioning circuit board is connected to the electrode clamping members through wires for filtering, amplifying and analog-to-digital conversion of the original potential signal; The visual recognition module includes an AI camera and an image processing unit. The AI ​​camera is fixed above the base structure by a bracket. The image processing unit is embedded inside the base structure and connected to the AI ​​camera via a data cable. The image processing unit is configured with a crowd density recognition algorithm model based on deep learning, which is used to output audience quantity level parameters in real time. A bouquet driving mechanism includes a petal skeleton assembly, a servo push rod assembly, and a central control board. The petal skeleton assembly consists of multiple arc-shaped metal plates arranged radially around a central axis. One end of each arc-shaped metal plate is hinged to the central axis, and the other end is hinged to the output end of the corresponding servo push rod assembly via a connecting rod. The servo push rod assembly includes a push rod motor and a travel limit sleeve. The housing of the push rod motor is fixed to the inner wall of the base structure with screws. The travel limit sleeve is fitted onto the telescopic rod of the push rod motor and welded to the housing of the push rod motor. The central control board is connected to the signal conditioning circuit board, the image processing unit, and each push rod motor via ribbon cables. It is used to receive plant electrical signal strength values ​​and audience quantity level parameters, and generate target telescopic length commands for each push rod motor accordingly. A particle display system includes a transparent curved screen and a graphics rendering host. The transparent curved screen is arranged around the periphery of the petal skeleton assembly and is bolted to the top flange of the base structure via L-shaped brackets. The graphics rendering host is built into the cavity of the base structure and is connected to the transparent curved screen via an HDMI cable. The graphics rendering host is loaded with a particle physics engine program, which maps the plant electrical signal intensity value to particle jumping frequency and amplitude variables, and maps the audience quantity level parameter to particle distribution density parameter. The audio interaction module includes a digital audio processor, a power amplifier, and a ring speaker array. The digital audio processor is connected to the graphics rendering host via an I²S bus to read the spectral characteristic parameters corresponding to the current particle distribution state. The input terminal of the power amplifier is connected to the audio output terminal of the digital audio processor via a shielded audio cable, and the output terminal is connected to each sound-emitting unit of the ring speaker array via a multi-core cable. The ring speaker array is equally spaced in the mounting slots opened on the upper surface of the base structure along the bottom circumference of the transparent curved screen, and each sound-emitting unit is arranged at a 15-degree angle toward the central axis of the device.

[0006] In some embodiments, the electrode holder includes an elastic spring, an insulating handle, and silver-plated contact pins. One end of the elastic spring is welded to the inner cavity of the insulating handle, and the other end extends out of the front end of the insulating handle and is bent to form a clamping opening. The silver-plated contact pin passes through the center of the clamping opening and is electrically connected to the elastic spring. The signal conditioning circuit board is provided with an isolation operational amplifier chip and a 24-bit Δ-Σ ADC chip. The input terminal of the isolation operational amplifier chip is connected to two sets of silver-plated contact pins through shielded twisted-pair cables, and the output terminal is connected to the analog input channel of the 24-bit Δ-Σ ADC chip.

[0007] In some embodiments, the arc-shaped metal sheet of the petal skeleton assembly is stamped from 6061-T6 aluminum alloy. Each arc-shaped metal sheet has a through hole with a diameter of 8mm at its hinge end. The central shaft is a solid stainless steel shaft with an outer diameter of 7.9mm. The arc-shaped metal sheet is fitted onto the central shaft with a clearance fit and is limited by axial retaining rings at both ends. The connecting rod is a carbon fiber hollow tube, and its two ends are connected to the free end of the arc-shaped metal sheet and the end of the telescopic rod of the push rod motor respectively through M3 ball head screws.

[0008] In some embodiments, the number of servo actuator groups is six, evenly distributed circumferentially along the central axis, with an angle of 60 degrees between adjacent groups. Each actuator motor synchronously receives a PWM control signal from the central control board, and its extension / retraction range is 0–50 mm with a repeatability of ±0.1 mm. In some embodiments, the image processing unit runs a lightweight YOLOv5s model, which, after transfer learning training, can recognize three audience levels: 0–3 people, 4–6 people, and 7 people or more. The image processing unit sends the current audience level code to the central control board every 200 ms. The central control board has built-in lookup table logic to map different audience levels to a petal unfolding angle reference value. This reference value is superimposed with a dynamic offset calculated from the plant's electrical signal strength to generate the final target extension / retraction length command.

[0009] In some embodiments, the particle physics engine program has a preset three-dimensional spatial coordinate system, the origin of which is located at the geometric center of the central axis, and the Z-axis is vertically upward. The particle jumping frequency f satisfies the formula: f = k1·V + f0, where V is the normalized value of the plant electrical signal intensity, k1 is the frequency gain coefficient, and f0 is the fundamental frequency offset. The particle distribution density ρ satisfies the formula: ρ = k2·N + ρ0, where N is the audience number level encoding value, k2 is the density gain coefficient, and ρ0 is the initial density constant.

[0010] In some embodiments, the digital audio processor has a built-in convolutional reverb algorithm module and a dynamic equalizer module. The convolutional reverb algorithm module calls the corresponding impulse response file according to the current particle distribution density ρ, and the dynamic equalizer module adjusts the slope of the gain curve of the audio signal in the 200Hz–2kHz frequency band in real time according to the particle jumping frequency f.

[0011] In some embodiments, the base structure includes a bottom shell, a middle partition plate, and a top cover. The bottom shell is a one-piece cast aluminum part with four M8 grounding threaded holes at its bottom. The middle partition plate is a 3mm thick acrylic plate, which is threaded to the inner cavity of the bottom shell through four copper pillars. The top cover is an aluminum alloy die-cast part with heat dissipation fins, and its upper surface has twelve circular openings with a diameter of 25mm for embedding the sound-emitting units of the ring speaker array.

[0012] In some embodiments, the central control board, the graphics rendering host, and the digital audio processor share the same power supply bus, which is supplied with 24V DC voltage by a switching power supply module. The input terminal of the switching power supply module is connected to AC220V mains power, and the output terminal provides the required operating voltage to each functional unit through a DC / DC isolation module.

[0013] In the above scheme, the electrophysiological signal-driven bouquet shape adaptive art presentation device includes a base structure, a plant signal acquisition module, a visual recognition module, a bouquet driving mechanism, a particle display system, and an audio interaction module. The plant signal acquisition module is fixedly installed on the base structure to acquire the surface potential difference of the plants and convert it into digital signals. The visual recognition module identifies the number of audience members in real time through an AI camera and an image processing unit. The bouquet driving mechanism consists of a petal skeleton assembly, a servo push rod assembly, and a central control board. The central control board calculates the target extension length of each push rod motor based on the intensity of the plant electrophysiological signal and the number of audience members, thereby precisely controlling the petal unfolding angle. The particle display system maps the plant electrophysiological signal into particle jumping parameters and adjusts the particle distribution density in conjunction with the number of audience members, forming a dynamic visualization effect on a transparent curved screen. The audio interaction module adjusts the audio spectrum characteristics and spatial reverberation effect in real time according to the particle state. This invention establishes a closed-loop linkage mechanism between plant electrophysiological signals, audience behavior recognition, and multi-sensory output, so that the changes in bouquet shape not only reflect the plant's own electrophysiological activity but also respond to the dynamics of the environment and the flow of people. This solves the problems of single shape response and lack of environmental context awareness in existing devices, and achieves a deep integration of artistic expression with biological signals and crowd behavior. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention, showing the external shape of the device and the layout of its main modules.

[0015] The attached diagram is labeled as follows: 1. Base structure; 2. Plant signal acquisition module; 3. Electrode holder; 4. AI camera; 5. Petal skeleton assembly; 6. Transparent curved screen; 7. Circular speaker array.

[0016] Figure 2 This is a partial connection diagram of the plant signal acquisition module and the bouquet drive mechanism, showing the contact method between the electrode holder and the stem and the installation position of the signal conditioning circuit board.

[0017] The attached diagram is labeled as follows: 3. Electrode holder; 8. Signal conditioning circuit board; 9. Silver-plated contact pin; 10. Elastic spring; 11. Insulating handle.

[0018] Figure 3 This is a top sectional view of the bouquet drive mechanism, showing the assembly relationship between the petal skeleton assembly, the servo push rod assembly, and the central shaft.

[0019] The attached figures are labeled as follows: 5. Petal skeleton assembly; 12. Servo push rod assembly; 13. Central shaft; 14. Arc-shaped metal plate; 15. Connecting rod; 16. Push rod motor; 17. Travel limit sleeve.

[0020] Figure 4 This is a block diagram showing the connection between the visual recognition module and the central control system, illustrating the data path between the AI ​​camera, image processing unit, and central control board.

[0021] The attached diagram is labeled as follows: 4, AI camera; 18, image processing unit; 19, central control board.

[0022] Figure 5 This is an integrated schematic diagram of the particle display system and the audio interaction module, showing the connection relationship between the transparent curved screen, the graphics rendering host, the digital audio processor, and the speaker array.

[0023] The attached diagram is labeled as follows: 6. Transparent curved screen; 20. Graphics rendering host; 21. Digital audio processor; 22. Power amplifier; 7. Circular speaker array.

[0024] Figure 6 This is a layout diagram of the internal functional units of the base structure, showing the spatial configuration of each electronic module between the bottom shell, the middle partition, and the top cover.

[0025] The attached diagram is labeled as follows: 1. Base structure; 23. Bottom shell; 24. Middle partition; 25. Top cover; 8. Signal conditioning circuit board; 18. Image processing unit; 19. Central control board; 20. Graphics rendering host; 21. Digital audio processor; 22. Power amplifier; 26. Switching power supply module; 27. DC / DC isolation module; 28. L-shaped corner bracket; 29. ​​Flange; 30. Shielded twisted pair cable; 31. Ribbon cable; 32. HDMI cable; 33. I²S bus; 34. Shielded audio cable; 35. Multi-core cable. Detailed Implementation

[0026] This invention provides an electrophysiological signal-driven adaptive art presentation device for bouquet shapes. The specific embodiments of this invention will be described in detail below with reference to the accompanying drawings.

[0027] like Figure 1 As shown, the device comprises a base structure 1, a plant signal acquisition module 2, an electrode holder 3, an AI camera 4, a petal skeleton assembly 5, a transparent curved screen 6, and a ring speaker array 7. The base structure 1 serves as the main support for the entire device, housing multiple electronic functional modules. The plant signal acquisition module 2 is fixedly installed on the upper surface of the base structure 1 near the center, used to contact the stem of the plant under test to acquire electrical signals. The AI ​​camera 4 is fixed above the base structure 1 via a bracket, facing the space in front of the device to acquire images. The petal skeleton assembly 5 is located at the top center of the base structure 1, radiating outwards. The transparent curved screen 6 is arranged around the outer periphery of the petal skeleton assembly 5 and bolted to the top flange 29 of the base structure 1 via L-shaped brackets 28. The ring speaker array 7 is embedded in a mounting groove on the upper surface of the base structure 1 along the bottom circumference of the transparent curved screen 6.

[0028] like Figure 2 As shown, the plant signal acquisition module 2 includes an electrode holder 3 and a signal conditioning circuit board 8. The electrode holder 3 consists of an elastic spring 10, an insulating handle 11, and silver-plated contact pins 9. One end of the elastic spring 10 is welded to the inner cavity of the insulating handle 11, and the other end extends out of the front end of the insulating handle 11 and is bent to form a clamp. The silver-plated contact pin 9 passes through the center of the clamp and is electrically connected to the elastic spring 10. In use, the two sets of electrode holders 3 are clamped at different positions on the plant stem, ensuring close contact between the silver-plated contact pins 9 and the plant epidermis. The signal conditioning circuit board 8 is connected to the two sets of silver-plated contact pins 9 via shielded twisted-pair cables 30 to receive the raw potential difference signal. The signal conditioning circuit board 8 is equipped with an isolation operational amplifier chip and a 24-bit Δ-Σ ADC chip. The input of the isolation operational amplifier chip is connected to the shielded twisted-pair cable 30, and the output is connected to the analog input channel of the 24-bit Δ-Σ ADC chip, completing signal filtering, amplification, and analog-to-digital conversion processing.

[0029] like Figure 3 As shown, the petal skeleton assembly 5 consists of six arc-shaped metal plates 14 arranged radially around a central axis 13. Each arc-shaped metal plate 14 has an 8mm diameter through hole at one end and is fitted onto a solid stainless steel central axis 13 with an outer diameter of 7.9mm. The two are clearance-fitted and limited by axial retaining rings at both ends to prevent axial movement. The arc-shaped metal plates 14 are made of 6061-T6 aluminum alloy, which has good strength and lightweight characteristics. The free end of each arc-shaped metal plate 14 is connected to a connecting rod 15 made of carbon fiber hollow tube by an M3 ball head screw. The other end of the connecting rod 15 is also connected to the end of the telescopic rod of the push rod motor 16 in the servo push rod assembly 12 by an M3 ball head screw. There are six sets of servo push rod assemblies 12, evenly distributed around the central axis 13, with an included angle of 60 degrees between adjacent sets. Each servo actuator group 12 includes an actuator motor 16 and a travel limit sleeve 17. The actuator motor 16 housing is fixed to the inner wall of the base structure 1 by screws. The travel limit sleeve 17 is sleeved on the outside of the telescopic rod of the actuator motor 16 and welded to the actuator motor 16 housing to limit the maximum travel range of the telescopic rod to 0–50 mm and the repeatability to ±0.1 mm.

[0030] like Figure 4 As shown, the visual recognition module includes an AI camera 4 and an image processing unit 18. The AI ​​camera 4 is fixed above the base structure 1 by a bracket, with its lens facing the area where the audience is located, capturing images of the scene in front in real time. The image processing unit 18 is embedded inside the base structure 1 and connected to the AI ​​camera 4 via a data cable. The image processing unit 18 runs a lightweight YOLOv5s model, which, after transfer learning training, can recognize three audience levels: 0–3 people, 4–6 people, and 7 people and above. The image processing unit 18 sends the current audience level code to the central control board 19 every 200ms. The central control board 19 is connected to the signal conditioning circuit board 8, the image processing unit 18, and each push rod motor 16 via ribbon cables 31, and is used to receive the plant electrical signal strength value and the audience level parameter, and generate the target extension length command for each push rod motor 16 accordingly. The central control board 19 has built-in lookup table logic that maps different audience levels to a reference value for the petal unfolding angle. This reference value is superimposed with a dynamic offset calculated from the plant electrical signal strength to generate the final target extension length command.

[0031] like Figure 5As shown, the particle display system includes a transparent curved screen 6 and a graphics rendering host 20. The transparent curved screen 6 is arranged around the periphery of the petal skeleton assembly 5 and is bolted to the top flange 29 of the base structure 1 via L-shaped brackets 28. The graphics rendering host 20 is built into the cavity of the base structure 1 and is connected to the transparent curved screen 6 via an HDMI cable 32. The graphics rendering host 20 is loaded with a particle physics engine program, which has a preset three-dimensional spatial coordinate system with the origin located at the geometric center of the central axis 13 and the Z-axis pointing vertically upward. The particle jumping frequency f satisfies the formula: f = k1·V + f0, where V is the normalized plant electrical signal strength value, k1 is the frequency gain coefficient, and f0 is the fundamental frequency offset; the particle distribution density ρ satisfies the formula: ρ = k2·N + ρ0, where N is the audience number level encoding value, k2 is the density gain coefficient, and ρ0 is the initial density constant. The audio interaction module includes a digital audio processor 21, a power amplifier 22, and a ring speaker array 7. The digital audio processor 21 communicates with the graphics rendering host 20 via the I²S bus 33 to read the spectral characteristic parameters corresponding to the current particle distribution state. The input terminal of the power amplifier 22 is connected to the audio output terminal of the digital audio processor 21 via a shielded audio cable 34, and the output terminal is connected to each sound-emitting unit of the ring speaker array 7 via a multi-core cable 35. The ring speaker array 7 is equally spaced along the bottom circumference of the transparent curved screen 6 and embedded in the mounting slots opened on the upper surface of the base structure 1, with each sound-emitting unit arranged at a 15-degree angle towards the central axis 13 of the device. The digital audio processor 21 has a built-in convolution reverberation algorithm module and a dynamic equalizer module. The convolution reverberation algorithm module calls the corresponding impulse response file according to the current particle distribution density ρ, and the dynamic equalizer module adjusts the slope of the gain curve of the audio signal in the 200Hz–2kHz frequency band in real time according to the particle jumping frequency f.

[0032] like Figure 6As shown, the base structure 1 includes a bottom shell 23, a middle partition 24, and a top cover 25. The bottom shell 23 is a one-piece cast aluminum part with four M8 grounding threaded holes at its bottom; the middle partition 24 is a 3mm thick acrylic plate, which is threaded to the inner cavity of the bottom shell 23 by four copper pillars; the top cover 25 is an aluminum alloy die-cast part with heat dissipation fins, and its upper surface has twelve circular openings with a diameter of 25mm for embedding the sound-generating units of the ring speaker array 7. The signal conditioning circuit board 8, the image processing unit 18, the central control board 19, the graphics rendering host 20, the digital audio processor 21, and the power amplifier 22 are all installed inside the base structure 1. The signal conditioning circuit board 8 is fixed to the inner wall of the bottom shell 23 near the plant signal acquisition module 2; the image processing unit 18 and the central control board 19 are installed above the middle partition 24; the graphics rendering host 20, the digital audio processor 21, and the power amplifier 22 are arranged below the middle partition 24 near the bottom shell 23. The switching power supply module 26 is installed in the corner of the bottom shell 23. Its input terminal is connected to AC220V mains power, and its output terminal provides 24V DC voltage to the power supply bus. The DC / DC isolation module 27 is connected to the output terminal of the switching power supply module 26 and provides the required operating voltage to each functional unit.

[0033] The electrical connections between the modules are as follows: the signal conditioning circuit board 8 is connected to the silver-plated contact pins 9 in the electrode holder 3 via shielded twisted-pair cable 30; the central control board 19 is connected to the signal conditioning circuit board 8, the image processing unit 18, and each push rod motor 16 via ribbon cable 31; the graphics rendering host 20 is connected to the transparent curved screen 6 via HDMI cable 32; the digital audio processor 21 is connected to the graphics rendering host 20 via I²S bus 33; the power amplifier 22 is connected to the digital audio processor 21 via shielded audio cable 34, and then connected to the ring speaker array 7 via multi-core cable 35; the L-shaped bracket 28 is used to fix the transparent curved screen 6 to the flange 29 on the top cover 25. In actual operation, the stem of the plant to be tested is first placed between the two electrode holders 3, so that the silver-plated contact pins 9 make good contact with the plant epidermis. The weak potential difference generated on the plant surface is conducted to the signal conditioning circuit board 8 via the elastic spring 10, amplified by the isolation operational amplifier chip and digitized by the 24-bit Δ-Σ ADC chip, forming the plant electrical signal strength value and transmitting it to the central control board 19. Meanwhile, the AI ​​camera 4 continuously captures images of the audience area in front. The image processing unit 18 analyzes the image content based on the YOLOv5s model and outputs an audience quantity level code to the central control board 19 every 200ms. The central control board 19 converts the audience quantity level into a petal unfolding angle reference value according to a preset lookup table logic, and calculates the target extension length of each push rod motor 16 by combining the plant electrical signal strength value. Then, it controls each push rod motor 16 to move synchronously through PWM signal, driving the connecting rod 15 to push the arc-shaped metal plate 14 to rotate around the central axis 13, realizing the overall shape change of the petal skeleton component 5. The graphics rendering host 20 synchronously receives the plant electrical signal strength value and audience quantity level parameters, calculates the particle jumping frequency f and distribution density ρ according to a preset formula, and renders the corresponding dynamic particle effect on the transparent curved screen 6. The digital audio processor 21 obtains the particle state parameters through the I²S bus 33, calls the corresponding reverberation algorithm and adjusts the equalizer parameters, and drives the ring speaker array 7 through the power amplifier 22 to play audio content with spatial sense and dynamic changes. The entire system is powered by a unified switching power supply module 26, and a DC / DC isolation module 27 ensures that each functional unit obtains a stable and mutually isolated operating voltage, thereby ensuring the long-term reliable operation of the device.

[0034] To enable those skilled in the art to fully understand and implement this invention, the specific implementation principles of this invention are further supplemented below with a specific application scenario.

[0035] When deploying this device in the art gallery exhibition hall, the stem of a live pothos plant is first inserted into the collection area consisting of two electrode holders 3, so that the silver-plated contact needle 9 pierces the epidermal cuticle and forms a low-impedance contact with the internal vascular bundle tissue. At this time, the action potential generated by the plant due to changes in ambient light or the approach of the audience is conducted to the signal conditioning circuit board 8 through the elastic spring 10. After the isolation operational amplifier chip suppresses common-mode interference, the 24-bit Δ-Σ ADC chip completes high-resolution analog-to-digital conversion at a sampling rate of 1 kSPS, and outputs a digital signal value V in the range of 0–3.3 V. This value is filtered by moving average and then transmitted to the central control board 19 as the plant's electrical signal strength parameter. Meanwhile, AI camera 4 continuously captures RGB image streams of a 3m x 2m area in front at 30 fps. Image processing unit 18 loads a YOLOv5s model finely tuned through transfer learning to detect and count human targets in the image in real time. Based on preset thresholds, the results are quantized into three encoding levels: N=0 (0–3 people), N=1 (4–6 people), or N=2 (7 people and above). Every 200 ms, the results are sent to central control board 19 via UART interface. After receiving V and N, central control board 19 first queries the internally stored mapping table: when N=0, the petal unfolding angle reference value θ0=30°; when N=1, θ0=45°; when N=2, θ0=60°. Then, the dynamic offset is calculated according to the formula Δθ = α·(V−V_min) / (V_max−V_min), where α is the preset maximum offset angle (e.g., 15°), and V_min and V_max are the typical electrical signal amplitudes of plants in resting and stimulated states, respectively. The final target angle θ = θ0 + Δθ is converted into the target extension length L of each push rod motor 16 in the servo push rod assembly 12. This conversion is based on the kinematic model of the four-bar linkage composed of the connecting rod 15 and the arc-shaped metal plate 14, ensuring that the six push rods output precise displacement synchronously. After receiving the PWM signal, the push rod motor 16 drives the extension rod to make a linear motion of 0–50 mm under the constraint of the travel limit sleeve 17. The carbon fiber connecting rod 15 pulls the arc-shaped metal plate 14 made of 6061-T6 aluminum alloy to rotate around the central axis 13. Since the outer diameter of the central axis 13 is 7.9 mm and the through hole of the arc-shaped metal plate 14 is 8 mm, a radial gap of 0.1 mm is formed. With the cooperation of the axial retaining rings at both ends, smooth rotation is ensured and wobbling is avoided. Thus, the petal skeleton assembly 5 can achieve continuous, stable and repeatable positioning accuracy of ±0.1 mm within the range of 30°–75°, and adaptive adjustment of its shape.The graphics rendering host 20 synchronously acquires the normalized V and N values, calculates the particle jumping frequency according to the preset formula f = k1·V + f0 (k1=8 Hz / V, f0=2 Hz) in the particle physics engine, and determines the number of particles per unit volume according to ρ = k2·N + ρ0 (k2=120 particles / level, ρ0=200 particles). The engine constructs a right-handed three-dimensional coordinate system with the geometric center of the central axis 13 as the origin, and renders a dynamic particle cloud on the transparent curved screen 6 that jumps faster or slower depending on the strength of the plant electrical signal and diffuses and densifies outward as the number of audience members increases. The digital audio processor 21 reads the f and ρ parameters in real time through the I²S bus 33. When ρ increases, the convolution reverberation algorithm module automatically switches to a large hall impulse response file with a stronger sense of space. When f increases, the dynamic equalizer module increases the gain slope of the 200Hz–2kHz frequency band, so that the audio timbre gradually changes from deep and rich to bright and crisp. The multi-channel audio signal amplified by power amplifier 22 drives the twelve sound-producing units of the ring speaker array 7 through multi-core cable 35. Each unit is tilted 15 degrees toward the central axis 13 to form a sound field focused on the top of the bouquet, realizing the spatial convergence and dynamic evolution of sound energy.

[0036] The entire system is powered by a switching power supply module 26, which connects to AC 220V mains power and outputs a 24V DC bus voltage. A DC / DC isolation module 27 converts this voltage into multiple isolated power supplies of ±12V, 5V, and 3.3V, supplying power to the signal conditioning circuit board 8, image processing unit 18, central control board 19, and audio power stage, respectively. This effectively blocks ground loop interference, ensuring a signal-to-noise ratio of no less than 60 dB for weak plant electrical signals. The base structure 1 internally uses a partition 24 to partition high- and low-frequency circuits. The signal conditioning circuit board 8 is placed adjacent to the electrode holder 3 to shorten analog traces. High-power modules such as the graphics rendering host 20 are placed at the bottom of the base shell 23 and passively cooled by heat sinks on the top cover 25, ensuring that the temperature rise of each functional unit does not exceed 15 K even after more than 8 hours of continuous operation.

[0037] All content not described in detail in this specification belongs to existing technology known to those skilled in the art, and the model parameters of each electronic device are not specifically limited. Conventional industrial-grade devices can be used to implement them. Auxiliary circuits and software logic not mentioned in this technical solution are not shown in the figure because they belong to general technology, and will not be described in detail here.

[0038] The above description is merely 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. An electrophysiological signal-driven adaptive art presentation device for bouquet shapes, characterized in that, include: Base structure (1); Plant signal acquisition module (2), the plant signal acquisition module (2) is fixedly installed on the base structure (1), including at least one pair of electrode holders (3) and signal conditioning circuit board (8), the electrode holders (3) are used to hold the plant stem to obtain its surface potential difference, the signal conditioning circuit board (8) is connected to the electrode holders (3) through shielded twisted pair cable (30); Visual recognition module, the visual recognition module includes AI camera (4) and image processing unit (18), the AI ​​camera (4) is fixed above the base structure (1) by a bracket, the image processing unit (18) is embedded inside the base structure (1) and connected to the AI ​​camera (4) through a data cable; The bouquet driving mechanism includes a petal skeleton assembly (5), a servo push rod group (12), and a central control board (19). The petal skeleton assembly (5) is composed of multiple arc-shaped metal pieces (14) arranged radially around a central axis (13). One end of each arc-shaped metal piece (14) is hinged to the central axis (13), and the other end is hinged to the output end of the corresponding servo push rod group (12) through a connecting rod (15). The central control board (19) is connected to the signal conditioning circuit board (8), the image processing unit (18), and each of the servo push rod groups (12) through a ribbon cable (31). The particle display system includes a transparent curved screen (6) and a graphics rendering host (20). The transparent curved screen (6) is arranged around the outer periphery of the petal skeleton assembly (5) and bolted to the top flange (29) of the base structure (1) through L-shaped corner brackets (28). The graphics rendering host (20) is built into the cavity of the base structure (1) and connected to the transparent curved screen (6) through an HDMI cable (32). The audio interaction module includes a digital audio processor (21), a power amplifier (22), and a ring speaker array (7). The digital audio processor (21) is connected to the graphics rendering host (20) via an I²S bus (33). The input end of the power amplifier (22) is connected to the audio output end of the digital audio processor (21) via a shielded audio cable (34). The output end is connected to the ring speaker array (7) via a multi-core cable (35). The ring speaker array (7) is installed at equal intervals along the bottom circumference of the transparent curved screen (6) in the mounting slots opened on the upper surface of the base structure (1).

2. The electrophysiological signal-driven adaptive art presentation device for bouquet shapes as described in claim 1, characterized in that, The electrode holder (3) includes an elastic spring (10), an insulating handle (11), and silver-plated contact pins (9). One end of the elastic spring (10) is welded to the inner cavity of the insulating handle (11), and the other end extends out of the front end of the insulating handle (11) and is bent to form a clamp. The silver-plated contact pins (9) are inserted at the center of the clamp and are electrically connected to the elastic spring (10). The signal conditioning circuit board (8) is provided with an isolation operational amplifier chip and a 24-bit Δ-Σ ADC chip. The input terminal of the isolation operational amplifier chip is connected to two sets of silver-plated contact pins (9) through the shielded twisted pair cable (30).

3. The electrophysiological signal-driven adaptive art presentation device for bouquet shapes as described in claim 1, characterized in that, The arc-shaped metal sheet (14) is made of 6061-T6 aluminum alloy and is stamped. Each arc-shaped metal sheet (14) has a through hole with a diameter of 8mm at the hinge end. The central shaft (13) is a solid stainless steel shaft with an outer diameter of 7.9mm. The arc-shaped metal sheet (14) is fitted onto the central shaft (13) with a clearance fit and is limited by axial retaining rings at both ends. The connecting rod (15) is a carbon fiber hollow tube, and its two ends are connected to the free end of the arc-shaped metal sheet (14) and the telescopic rod end of the servo push rod assembly (12) respectively by M3 ball head screws.

4. The electrophysiological signal-driven adaptive art presentation device for bouquet shapes as described in claim 1, characterized in that, The number of servo push rod groups (12) is six, which are evenly distributed around the central axis (13). The included angle between two adjacent servo push rod groups (12) is 60 degrees. Each servo push rod group (12) includes a push rod motor (16) and a stroke limiting sleeve (17). The housing of the push rod motor (16) is fixed to the inner wall of the base structure (1) by screws. The stroke limiting sleeve (17) is sleeved on the outside of the telescopic rod of the push rod motor (16) and welded to the housing of the push rod motor (16). The telescopic stroke range of the push rod motor (16) is 0–50 mm, and the repeatability is ±0.1 mm.

5. The electrophysiological signal-driven adaptive art presentation device for bouquet shapes as described in claim 1, characterized in that, The image processing unit (18) runs the YOLOv5s lightweight model, which can identify three audience levels: 0-3 people, 4-6 people, and 7 people and above after transfer learning training. The image processing unit (18) sends the current audience level code to the central control board (19) every 200ms. The central control board (19) has built-in lookup table logic to map different audience levels to the petal unfolding angle reference value.

6. The electrophysiological signal-driven adaptive art presentation device for bouquet shapes as described in claim 1, characterized in that, The graphics rendering host (20) is loaded with a particle physics engine program. The program has a three-dimensional spatial coordinate system with the origin located at the geometric center of the central axis (13) and the Z-axis pointing vertically upward. The particle jumping frequency f satisfies the formula: f = k1·V + f0, where V is the normalized value of the plant electrical signal intensity, k1 is the frequency gain coefficient, and f0 is the fundamental frequency offset. The particle distribution density ρ satisfies the formula: ρ = k2·N + ρ0, where N is the audience number level code value, k2 is the density gain coefficient, and ρ0 is the initial density constant.

7. The electrophysiological signal-driven adaptive art presentation device for bouquet shapes as described in claim 1, characterized in that, The digital audio processor (21) has a built-in convolutional reverb algorithm module and a dynamic equalizer module. The convolutional reverb algorithm module calls the corresponding impulse response file according to the current particle distribution density ρ, and the dynamic equalizer module adjusts the slope of the gain curve of the audio signal in the 200Hz–2kHz frequency band according to the particle jumping frequency f.

8. The electrophysiological signal-driven adaptive art presentation device for bouquet shapes as described in claim 1, characterized in that, The base structure (1) includes a bottom shell (23), a middle partition (24) and a top cover (25). The bottom shell (23) is a cast aluminum integral part with four M8 grounding thread holes at the bottom. The middle partition (24) is an acrylic plate with a thickness of 3mm, which is threaded to the inner cavity of the bottom shell (23) through four copper pillars. The top cover (25) is an aluminum alloy die-cast part with heat dissipation fins, and its upper surface has twelve circular openings with a diameter of 25mm for embedding the sound-emitting unit of the ring speaker array (7).

9. The electrophysiological signal-driven bouquet shape adaptive art presentation device according to any one of claims 1 to 8, characterized in that, The central control board (19), the graphics rendering host (20) and the digital audio processor (21) share the same power supply bus. The power supply bus is provided with 24V DC voltage by the switching power supply module (26). The input terminal of the switching power supply module (26) is connected to AC220V mains power, and the output terminal provides the required working voltage to each functional unit through the DC / DC isolation module (27).

10. The electrophysiological signal-driven adaptive art presentation device for bouquet shapes as described in claim 1, characterized in that, Each sound-emitting unit of the ring loudspeaker array (7) is arranged at an angle of 15 degrees toward the central axis (13) of the device.

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