An acousto-optic coaxial target purification system for treating excrement pollution and a synergistic control method thereof

Abstract

The application discloses a kind of for nursing excrement pollution acousto-optic coaxial target purification system and its synergic control method, it is related to intelligent nursing instrument, environmental disinfection and physical chemistry synergic purification technical field, including, targeting launch head, it is integrated with acousto-optic coaxial coupling output module, multimodal sensing positioning module, for identifying and positioning pollution source, mobile and attitude adjustment platform, for carrying and driving the targeting launch head, by acousto-optic compound lens realizes microcosmic superposition of energy field, makes ultrasonic cavitation effect and ultraviolet photochemical effect maximum overlap in space-time, produce synergistic effect effect far more than space separation or time-sharing work mode, solve the key bottleneck of 222nm far ultraviolet light application, utilize the mechanical penetration of ultrasonic to compensate the shortcoming that far ultraviolet light is weak to internal and uneven surface effect, simultaneously utilize the safety of far ultraviolet light, realized the possibility of local targeted processing in the presence of person environment.

Description

Technical Field

[0001] This invention relates to the fields of intelligent nursing devices, environmental disinfection and physicochemical synergistic purification technology, specifically to an acoustic-optical coaxial targeted purification system for nursing excrement pollution and its synergistic control method. Background Technology

[0002] In scenarios such as elderly care for the disabled, postoperative rehabilitation, and intensive care, the treatment of excretory contamination is a core challenge. These contaminants are complex in composition, often adhering to surfaces in a viscous state and easily forming biofilms, resulting in low efficiency of traditional treatment methods: chemical wiping is difficult to completely remove and may irritate the skin; traditional ultraviolet irradiation has weak penetration and is harmful to the human body; and ultrasonic cleaning alone is not thorough in sterilization.

[0003] In recent years, 222nm far-ultraviolet light has been considered a potential disinfection technology due to its strong destructive power against microbial DNA and low risk of damage to human cells. However, its effective range is limited, and its ability to treat uneven surfaces and internal contaminants is insufficient. How to combine the safe sterilization properties of 222nm far-ultraviolet light with another technology that can penetrate deeply, and achieve precise superposition and synergy of energy fields, is a technological gap that urgently needs to be addressed in this field. Summary of the Invention

[0004] The purpose of this invention is to overcome the technical shortcomings of existing technologies in the incomplete, untimely, and unsafe treatment of nursing excrement pollution, and to provide an acoustic-optical coaxial targeted purification system and its synergistic control method. This system, through an innovative acoustic-optical coaxial coupling structure, outputs high-frequency focused ultrasound and 222nm far-ultraviolet light in a strictly coaxial manner in space and synchronously in time, producing a significant synergistic purification effect. Secondly, through multimodal sensor fusion positioning and adaptive synergistic control algorithms, it achieves centimeter-level precise identification of pollution sources and targeted energy delivery, ultimately achieving rapid, deep, and thorough purification under low environmental radiation doses, and allowing for safe use in occupied environments as much as possible.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a coaxial acoustic-optical targeted purification system for treating excrement contamination, comprising: The targeted transmitter integrates an acousto-optic coaxial coupling output module. A multimodal sensing and positioning module is used to identify and locate pollution sources; A movement and attitude adjustment platform is used to support and drive the target launcher; A collaborative drive and control unit is used to drive the target transmitter and control its operating mode; The coaxial acoustic-optical coupling output module includes: a high-frequency focusing ultrasonic transducer, a 222nm far-ultraviolet light source, and an acoustic-optical composite lens. The acousto-optic composite lens is configured such that the ultrasonic beam generated by the high-frequency focusing ultrasonic transducer and the ultraviolet beam emitted by the 222nm far-ultraviolet light source have a spatial deviation of less than 1 mm between their acoustic axis and optical axis when they leave the output end face of the target emitter head, and the overlap of their focal spot areas within a preset working distance is greater than 80%.

[0006] In some embodiments, the high-frequency focused ultrasound transducer operates at a frequency of 1.8-3.2MHz; the emission peak wavelength of the 222nm far-ultraviolet light source is 222±2nm.

[0007] In some embodiments, the acousto-optic composite lens is made of magnesium fluoride, calcium fluoride, or fused silica with a transmittance of more than 85% for 222nm ultraviolet light, and simultaneously serves as the acoustic matching layer and focusing lens of the high-frequency focused ultrasonic transducer.

[0008] In some embodiments, the multimodal sensing and positioning module includes a multispectral imaging unit and a distributed gas sensing array; the distributed gas sensing array includes at least sensors for detecting ammonia and volatile organic compounds.

[0009] In some embodiments, an environmental safety monitoring module is also included, which includes at least one 222nm ultraviolet irradiance sensor arranged circumferentially around the target emitter head; the cooperative drive and control unit is configured to adjust or turn off the output of the 222nm far-ultraviolet light source according to the real-time reading of the sensor to keep the environmental irradiance below a preset safety threshold.

[0010] In some embodiments, the targeted emitter further includes a micro-mist auxiliary unit, the outlet of which is adjacent to the acousto-optic coaxial coupling output module, for spraying atomized droplets with a particle size of less than 10 μm onto the focal spot region.

[0011] A collaborative control method for a coaxial acoustic-optical targeted purification system for treating fecal contamination, characterized by comprising the following steps: S1. Pollution Event Detection and Triggering: The purification process is triggered by detecting characteristic signals of pollutants through sensors; S2. Multimodal Fusion Localization of Pollution Sources: Fusion processing of multispectral imaging data and gas concentration distribution data, and calculation of the core coordinates and pollution level of pollution sources through algorithms; S3. Acoustic-optical coaxial targeting alignment: Control the movement and attitude adjustment platform to drive the target emitter to align its acoustic-optical coaxial output end with the core coordinates; S4. Adaptive Collaborative Purification Execution: Based on the pollution level, select one from a variety of pre-stored collaborative working modes, and control the high-frequency focused ultrasonic transducer and the 222nm far-ultraviolet light source to work synchronously in that mode; S5. Purification Verification and Reset: Based on real-time feedback signals, determine whether purification is complete, and shut down the execution unit upon completion to reset the system.

[0012] In some embodiments, in step S2, the multimodal fusion localization specifically involves: firstly segmenting the suspected contaminated area through multispectral imaging, then guiding a distributed gas sensing array to scan within the area, and determining the core coordinates of the pollution source through a concentration gradient field inversion algorithm.

[0013] In some embodiments, in step S4, the cavitation effect generated by the high-frequency focused ultrasound and the photochemical effect of the 222nm far-ultraviolet light act coaxially and synchronously in space and time, synergistically promoting the generation and transport of hydroxyl radicals, so as to achieve deep oxidative degradation of pollutants. Beneficial effects

[0014] This invention provides an acoustic-optical coaxial targeted purification system for treating fecal contamination and its synergistic control method. This invention has the following advantages: This invention pioneers a new collaborative mechanism of "coaxial acoustic-optical synchronization in time and space." By using an acoustic-optical composite lens to achieve microscopic superposition of energy fields, it maximizes the spatiotemporal overlap of ultrasonic cavitation and ultraviolet photochemical effects, generating a synergistic effect far exceeding spatial separation or time-sharing operation modes. This solves a key bottleneck in the application of 222nm far-ultraviolet light. The mechanical penetrating power of ultrasound compensates for the weakness of far-ultraviolet light in its effect on internal and uneven surfaces. At the same time, the safety of far-ultraviolet light enables localized targeted treatment in manned environments, achieving intelligent targeted removal of complex adhering pollutants. Through a positioning algorithm that integrates multispectral imaging and gas concentration gradient field inversion, it can accurately locate the core of pollution and achieve precise energy delivery, constructing a complete intelligent closed loop. This achieves full-process automation and dynamic adjustment from perception, decision-making, execution to feedback, providing verifiable and significant technical effects. It has extremely high kill rates for pathogenic microorganisms and removal rates for odor molecules, and the environmental radiation dose during the treatment process is below the safety limit. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to embodiments. These embodiments are only for explaining the present invention and do not constitute a limitation on the scope of protection. Implementation methods not specifying specific conditions are generally carried out under conventional conditions.

[0016] Example 1: System Hardware Implementation and Integration This embodiment describes in detail the specific hardware configuration and integration method of the coaxial acoustic-optical targeted purification system.

[0017] Motion and attitude adjustment platform: A six-axis collaborative robot arm is used as the actuator, with its end flange for mounting the target launch head. The robot arm achieves a repeatability of ±0.5mm and its working radius covers a typical hospital bed area.

[0018] Targeted launcher: Acoustic-optical coaxial coupling output module: High-frequency focused ultrasonic transducer: It adopts a piezoelectric ceramic transducer with a center frequency of 2.5MHz. Its acoustic focus is designed to be 10cm away from the exit surface in the air, with a focal spot diameter of about 8mm and a peak sound intensity of up to 3W / cm².

[0019] 222nm far-ultraviolet light source: KrCl* excimer lamp tube with a peak wavelength of 222nm and an output light power of approximately 150mW. A set of compound eye lens homogenizers is integrated in front of the lamp tube's light outlet to ensure the formation of a circular light spot with a diameter of approximately 10mm and a light intensity distribution uniformity of more than 90% at a working distance of 10cm.

[0020] Acousto-optic composite lens: A plano-convex lens precision-machined from single-crystal magnesium fluoride (MgF2) material. Its convex surface is specially designed as an acoustic matching layer for impedance matching with the ultrasonic transducer and as an acoustic focusing lens; the planar side is coated with a high-reflection coating for a wavelength of 222nm. Optical and acoustic simulations and actual measurements have verified that at 10cm, the center deviation between the ultrasonic focal spot and the ultraviolet spot is less than 0.5mm, and the area overlap is greater than 85%.

[0021] Micro-mist auxiliary unit: Integrated piezoelectric atomizing plate, whose nozzle is located on the side of the acousto-optic composite lens, can produce fine water mist with an average particle size of about 5μm, and the atomization rate can be adjusted in the range of 0-1mL / min.

[0022] Multimodal sensing and positioning module: Multispectral imaging unit: a miniaturized multispectral camera with imaging capabilities in four independent bands: 470nm (blue), 560nm (green), 660nm (red), and 860nm (near infrared), and is mounted on the side of the target transmitter head.

[0023] Distributed gas sensing array: Composed of four miniature electrochemical ammonia (NH3) sensors and four broad-spectrum metal oxide volatile organic compound (VOC) sensors, arranged in a ring array around the transmitter housing.

[0024] Collaborative Drive and Control Unit: An embedded industrial controller based on a real-time operating system (RTOS), responsible for running sensor fusion positioning algorithms, robotic arm motion control, sound and light collaborative mode scheduling, and safety monitoring logic.

[0025] Environmental safety monitoring module: Four 222nm ultraviolet irradiance sensors with a range of 0-0.1mW / cm² are evenly arranged on the shell of the target emitter to monitor the ultraviolet leakage level around the working point in real time.

[0026] Example 2: Collaborative Control Process and Performance Verification This embodiment details the system's workflow and verifies its synergistic purification efficiency through comparative experiments.

[0027] System workflow: Trigger: The mattress's integrated humidity sensor detects abnormal humidity and sends an alarm signal to the system.

[0028] Preliminary Scan: The collaborative drive and control unit moves the robotic arm to move the target emitter above the alarm area. A multispectral camera is activated for scanning. By calculating the reflectance ratio of the 660nm and 860nm bands, the algorithm automatically segments out suspected areas matching the spectral characteristics of the excrement pollution.

[0029] Precise positioning: The robotic arm is controlled to slowly move and scan the suspected area using a gas sensor array. NH3 and VOC concentration data are collected at each point. The source of pollutant diffusion, i.e., the "core coordinates," is calculated using a concentration gradient field inversion algorithm. Based on the peak concentration, the pollution level is assessed as "moderate."

[0030] Alignment and Mode Selection: The robotic arm automatically adjusts its posture to precisely align the coaxial acoustic-optical output of the target emitter with the core coordinates at a distance set to 10cm. The control unit selects the "rapid purification mode" based on the "moderate" pollution level.

[0031] Synergistic purification execution: "Rapid purification mode" is activated. In this mode, both the high-frequency focused ultrasound transducer and the 222nm far-ultraviolet light source are synchronously triggered (i.e., simultaneously turned on and off) using pulses at a frequency of 50 Hz and a duty cycle of 50%. The micro-mist auxiliary unit is simultaneously activated at a low flow rate (0.3 mL / min). The synergistic effect is as follows: Ultrasonic effects: Cavitation physically breaks down pollutant clumps and biofilms, generating microflows and localized high temperatures and pressures, which promote homogeneous splitting of water molecules.

[0032] Ultraviolet radiation: 222nm photons directly damage microbial DNA and photolyze water molecules to produce hydroxyl radicals (·OH).

[0033] Synergistic effect: Due to the strict coaxial synchronization of sound and light, the collapse micro-region of cavitation bubbles is directly under high-intensity ultraviolet radiation, which greatly promotes the generation rate of ·OH; at the same time, the microfluidic effect of ultrasound accelerates the mixing and reaction of free radicals with the fragmented pollutants.

[0034] Safety monitoring: The environmental safety monitoring module shows that the peak value of the 222nm ultraviolet irradiance at 50cm from the target is 0.02mW / cm², indicating that the entire process is safe.

[0035] Feedback and Termination: The real-time monitored NH3 concentration drops below the background threshold within 20 seconds, and the multispectral image characteristics return to normal. The system determines that purification is complete, sequentially shuts down the ultraviolet, ultrasonic, and micro-mist units, records the operation log, and the robotic arm returns to the standby position.

[0036] Performance verification comparison experiment: Pollutant: A biofilm containing a high concentration of E. coli was prepared on cotton fabric to simulate pollutants.

[0037] Experimental group setup: Group A (Invention, Coaxial Synchronization): Using the system of Example 1, operate for 60 seconds in the "Rapid Purification Mode" described above.

[0038] Group B (Comparative example, coaxial time-sharing): Using the same hardware, but first only turning on ultrasound for 30 seconds, then only turning on ultraviolet light for 30 seconds.

[0039] Group C (comparative example, parallel but asynchronous): The ultrasonic and ultraviolet light sources are installed side by side (3cm apart) and work synchronously for 60 seconds, but the sound and light are not on the same axis.

[0040] Test results: The log reduction value (LRV) of microbial killing was detected after treatment.

[0041] Conclusion: The bactericidal effect of group A (LRV=5.3) was significantly better than that of group B (LRV=3.0) and group C (LRV=3.7), proving that the coaxiality and synchronization of sound and light are indispensable for producing synergistic effects.

[0042] Comparative Analysis of Examples To clearly illustrate the two key aspects of this invention, a comparison is provided below: Table 1: Comparison of Examples It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

Claims

1. A coaxial acoustic-optical targeted purification system for treating fecal contamination, characterized in that, include: The targeted transmitter integrates an acousto-optic coaxial coupling output module. A multimodal sensing and positioning module is used to identify and locate pollution sources; A movement and attitude adjustment platform is used to support and drive the target launcher; A collaborative drive and control unit is used to drive the target transmitter and control its operating mode; The coaxial acoustic-optical coupling output module includes: a high-frequency focusing ultrasonic transducer, a 222nm far-ultraviolet light source, and an acoustic-optical composite lens. The acousto-optic composite lens is configured such that the ultrasonic beam generated by the high-frequency focusing ultrasonic transducer and the ultraviolet beam emitted by the 222nm far-ultraviolet light source have a spatial deviation of less than 1 mm between their acoustic axis and optical axis when they leave the output end face of the target emitter head, and the overlap of their focal spot areas within a preset working distance is greater than 80%.

2. The coaxial acoustic-optical targeted purification system for treating fecal contamination according to claim 1, characterized in that, The high-frequency focused ultrasonic transducer operates at a frequency of 1.8-3.2MHz; the emission peak wavelength of the 222nm far-ultraviolet light source is 222±2nm.

3. The coaxial acoustic-optical targeted purification system for treating fecal contamination according to claim 1, characterized in that, The acousto-optic composite lens is made of magnesium fluoride, calcium fluoride, or fused silica with a transmittance of more than 85% for 222nm ultraviolet light, and simultaneously serves as the acoustic matching layer and focusing lens of the high-frequency focused ultrasonic transducer.

4. The coaxial acoustic-optical targeted purification system for treating fecal contamination according to claim 1, characterized in that, The multimodal sensing and positioning module includes a multispectral imaging unit and a distributed gas sensing array; the distributed gas sensing array includes at least sensors for detecting ammonia and volatile organic compounds.

5. The coaxial acoustic-optical targeted purification system for treating fecal contamination according to claim 1, characterized in that, It also includes an environmental safety monitoring module, which includes at least one 222nm ultraviolet irradiance sensor arranged around the circumference of the target emitter head; the cooperative drive and control unit is configured to adjust or turn off the output of the 222nm far-ultraviolet light source according to the real-time reading of the sensor, so as to keep the environmental irradiance below a preset safety threshold.

6. The coaxial acoustic-optical targeted purification system for treating fecal contamination according to claim 1, characterized in that, The target emitter also includes a micro-mist auxiliary unit, the outlet of which is adjacent to the acousto-optic coaxial coupling output module, for spraying atomized droplets with a particle size of less than 10 μm onto the focal spot region.

7. A collaborative control method for a coaxial acoustic-optical targeted purification system for treating fecal contamination according to any one of claims 1-6, characterized in that, Includes the following steps: S1. Pollution Event Detection and Triggering: The purification process is triggered by detecting characteristic signals of pollutants through sensors; S2. Multimodal Fusion Localization of Pollution Sources: Fusion processing of multispectral imaging data and gas concentration distribution data, and calculation of the core coordinates and pollution level of pollution sources through algorithms; S3. Acoustic-optical coaxial targeting alignment: Control the movement and attitude adjustment platform to drive the target emitter to align its acoustic-optical coaxial output end with the core coordinates; S4. Adaptive Collaborative Purification Execution: Based on the pollution level, select one from a variety of pre-stored collaborative working modes, and control the high-frequency focused ultrasonic transducer and the 222nm far-ultraviolet light source to work synchronously in that mode; S5. Purification Verification and Reset: Based on real-time feedback signals, determine whether purification is complete, and shut down the execution unit upon completion to reset the system.

8. The collaborative control method of the coaxial acoustic-optical targeted purification system for treating fecal contamination according to claim 7, characterized in that, In step S2, the multimodal fusion localization specifically involves: firstly segmenting the suspected contaminated area through multispectral imaging, then guiding a distributed gas sensing array to scan within the area, and finally determining the core coordinates of the pollution source through a concentration gradient field inversion algorithm.

9. The collaborative control method of the coaxial acoustic-optical targeted purification system for treating fecal contamination according to claim 1, characterized in that, In step S4, the cavitation effect generated by the high-frequency focused ultrasound and the photochemical effect of the 222nm far-ultraviolet light act coaxially and synchronously in space and time, synergistically promoting the generation and transport of hydroxyl radicals to achieve deep oxidative degradation of pollutants.