A bedside contactless disinfection device

Abstract

The present invention provides a bedside contactless disinfection device, which relates to the technical field of disinfection equipment, including a box body, a built-in liquid supply pump for conveying disinfectant, and an integrated processor, a millimeter-wave radar, and an infrared thermal imaging array; a barrier mechanism, including a curtain body that can be unfolded to form a closed disinfection area and an embedded atomizing nozzle and an ultraviolet disinfection module that cooperate with the curtain body; the processor is respectively connected to the infrared thermal imaging array, the millimeter-wave radar, the liquid supply pump, and the ultraviolet disinfection module to ensure that the disinfection process is safe and effective. In order to solve the problem of dynamic response defects, the present invention uses infrared thermal imaging to capture the body temperature distribution characteristics of static personnel and calculate the thermal imaging detection probability, analyzes the target speed based on millimeter-wave radar data, detects vital signs and identifies hidden personnel, and quantifies the intensity of movement through motion compensation, corrects the radar speed measurement error, and dynamically decides the detection probability to ensure that high-intensity disinfection is initiated in an unmanned environment and solve the risk of accidental exposure of personnel.

Description

Technical Field

[0001] The present invention relates to the technical field of disinfection equipment, in particular to a bedside contactless disinfection device. Background Art

[0002] In modern medical environments, traditional disinfection methods have many limitations and defects, which seriously affect disinfection efficiency, safety and environmental sustainability.

[0003] First, manual spraying disinfection is inefficient: According to the WHO's "Guidelines for Disinfection of Healthcare Environments," manual spraying disinfection takes 30 minutes per bed, while ultraviolet disinfection takes 15 minutes and requires clearing the area. This is not only time-consuming but also increases labor intensity, making it difficult to meet the demand for high-frequency disinfection. Second, traditional disinfection methods pose serious safety risks, especially the misuse of ultraviolet light. The Lancet report points out that every year around the world, medical staff suffer eye burns due to misuse of ultraviolet light. In addition, long-term or high-intensity ultraviolet exposure can cause skin erythema and burns, and even increase the risk of skin cancer.

[0004] In terms of disinfection effectiveness, traditional methods struggle to fully disinfect every corner of complex environments, leading to blind spots. They also have limited effectiveness against airborne pathogens and fail to effectively reduce the risk of airborne transmission. Traditional disinfection methods also waste resources. The lack of precise flow control can easily lead to excessive use of disinfectant, increasing costs and wasting resources. Furthermore, manual spraying makes it difficult to ensure uniform distribution of disinfectant, impacting disinfection effectiveness.

[0005] To address the above-mentioned shortcomings, prior art CN112237644B discloses a disinfection robot and its disinfection method. This describes the robot's mobile chassis structure, the various modules of the disinfection assembly (spray disinfection module, circulation disinfection module, and ultraviolet lamp disinfection module), and their specific construction and functions. Its operating mode section explains the various disinfection modes the robot can perform, including single and combined modes. The disinfection method explains how the robot executes the corresponding disinfection mode based on specific instructions or preset conditions, as well as the specific operating steps under different modes. Similarly, prior art CN112587693A discloses a design including a mobile lifting mechanism, a disinfection mechanism, and a protective adjustment mechanism. This design, controlled by a motor, can automatically lift and lower to accommodate beds of varying heights and specifications. It employs two disinfection methods: disinfectant spraying and ultraviolet irradiation. Through disinfection with disinfectant spraying and ultraviolet light, comprehensive disinfection of the bed is achieved.

[0006] However, the following deficiencies remain in practice: Regarding the prior art CN112237644B, it suffers from: 1. Dynamic response defects: This disinfection robot relies on lidar and ultrasonic sensors for navigation and obstacle avoidance, but does not explicitly consider multimodal biometric detection (such as thermal radiation and object micro-motion). Its UV disinfection mode activation and deactivation are primarily based on preset paths or manual commands, lacking the ability to detect human presence in real time. For example, the UV lamp continues operating after being exposed by the mechanical structure (external tube lifting and decorative tube rotation). If a person accidentally enters the disinfection area, relying solely on basic programming cannot promptly identify stationary or low-activity targets (such as sitting or lying patients), resulting in the risk of accidental UV exposure. 2. Defects in the disinfection mode switching mechanism: The disinfection mode switching proposed in the prior art relies on preset conditions (such as location arrival and time triggering) and lacks environmental adaptability. When the cyclic disinfection mode is activated, it simply rotates the decorative tube to expose the air inlet and activate the circulating fan, without considering real-time environmental parameters (such as temperature and humidity) to dynamically adjust the disinfection intensity. This results in insufficient temporal and spatial isolation between UV disinfection and human activity, and delayed response can lead to untimely interruption of disinfection. ③ Defects in UV disinfection safety: The UV lamp disinfection module proposed in the existing technology adopts a physical structure design (the decorative tube rotates to hide the UV lamp), but does not consider the monitoring and emergency mechanism during the disinfection process. If the mechanical structure fails (such as the decorative tube failure causing the UV lamp to be accidentally exposed), there is a lack of feedback capability, resulting in continuous radiation leakage.

[0007] In addition, although the existing technology CN112587693A can form an enclosure outside the target bed to prevent ultraviolet leakage or diffusion of disinfectant, the disinfection device needs to be moved to the side of the target bed before the enclosure disinfection operation can be performed. However, if the disinfection device can completely enclose the target bed, the volume of the entire device will need to be very large, and it is difficult to circulate between various wards, and the scope of application is very limited; in addition, the disinfection device adopts a top spraying method, in which the disinfectant cannot reach the bottom of the bed, and there is a large disinfection dead angle; the disinfection device can only disinfect the target bed within the enclosure, and cannot simultaneously disinfect the inside and outside of the curtain during operation. Subsequently, staff are required to disinfect the ward separately. Summary of the Invention

[0008] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a bedside contactless disinfection device to solve the existing problems.

[0009] In order to achieve the above object, the technical solution of the present invention is as follows:

[0010] A bedside contactless disinfection device comprising:

[0011] The box has a built-in liquid supply pump for delivering disinfectant, and is integrated with a processor, millimeter-wave radar and infrared thermal imaging array;

[0012] The enclosure mechanism includes a curtain that can be deployed to form a closed disinfection area, an embedded atomizing nozzle connected to the curtain, and a UV disinfection module. The processor is connected to the infrared thermal imaging array, millimeter wave radar, liquid supply pump, and UV disinfection module to ensure the safety and effectiveness of the disinfection process. The process is as follows:

[0013] The infrared thermal imaging array is set to collect the thermal radiation characteristics of the target area at a specific frame rate to obtain a sequence-level grayscale image representing the thermal imaging data of the personnel. The collected grayscale image is preprocessed and 64 key pixels are selected from the grayscale image as the region of interest. The average grayscale value of the key pixels is calculated. If the average grayscale value of a certain area is close to 1, it is considered that there is a thermal radiation characteristic of the personnel in the target area, and the thermal imaging detection probability is generated. Extract the instantaneous speed of each person detected by the millimeter-wave radar, calculate the average speed of all people, and generate the radar detection probability by comparing the absolute deviation between the instantaneous speed of each person and the average speed. , where the smaller the deviation value is, the higher the probability that people exist in the target area;

[0014] Construct a weighted fusion model:

[0015]

[0016] Generates the probability of personnel appearing in the target area , where is the thermal imaging weight coefficient, is the radar weight coefficient, η is the motion compensation factor, is the motion compensation probability, is the Sigmoid function; when When the value exceeds the decision threshold, the processor triggers the safety mechanism, immediately cuts off the power supply of the UV disinfection module, and simultaneously turns off the power supply of the liquid supply pump to stop spraying the disinfectant. Otherwise, the disinfection operation is performed according to the disinfection parameters.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] To solve the problem of dynamic response defects, the present invention uses infrared thermal imaging to capture the temperature distribution characteristics of static personnel and calculate the thermal imaging detection probability. It analyzes the target speed based on millimeter-wave radar data to detect vital signs and identify hidden personnel. At the same time, it quantifies the intensity of movement through motion compensation, corrects the radar speed measurement error, and dynamically decides the detection probability to ensure that high-intensity disinfection is initiated in an unmanned environment and solve the risk of accidental exposure of personnel.

[0019] In order to solve the defects of the disinfection mode switching mechanism, the present invention proposes to use real-time feedback data from temperature and humidity sensors to dynamically adjust the spray flow rate of disinfectant, such as reducing the atomization amount in a high humidity environment to prevent condensation, triggering the mode switching by calculating the decision threshold, and synchronously terminating the spraying through the internal spray hood to avoid waste of disinfectant.

[0020] In order to solve the safety defects of ultraviolet disinfection: the present invention sets the mode switching logic. When the probability of human presence exceeds the threshold, the ultraviolet power supply is cut off and the spraying is terminated. Conversely, the motor drives the flipping and expansion to realize the deployment and folding of the ultraviolet lamp tube. According to the control logic, ultraviolet disinfection is ensured under safe conditions.

[0021] In order to solve the problem of inability to thoroughly achieve disinfection due to the existence of blind spots in disinfection, the present invention proposes integrating C-shaped inner spray covers above and below the inner wall of the plastic curtain body. The gas-liquid control component guides the disinfectant into the inner spray cover, and then the inner spray cover can spray the disinfectant into the enclosed area from the top and bottom. The disinfectant sprayed from the top can fall from top to bottom to perform three-dimensional disinfection, and finally fall on the target bed to disinfect the surface of the target bed; the disinfectant sprayed from the bottom can be sprayed to the ground and the bottom of the target bed, so that the disinfection is more comprehensive;

[0022] At the same time, in terms of the spatial scope, the combination of the inner spray hood and the curtain body allows medical staff to pull up the curtain body during daily ventilation to complete the simultaneous layout of the closed area and the spray pipeline, which is easy to operate; when not disinfecting, the inner spray hood can be folded up with the curtain body and does not take up space; at the same time, an outer spray hood is set on the outside of the curtain body. During disinfection, not only the inner spray hood is used to spray and disinfect the inside of the curtain body, but also the outer spray hood is used to spray and disinfect the outside of the curtain body, thereby completing the disinfection of the ward, and there is no need to disinfect the ward separately.

[0023] 5. An operating component is proposed to position the retracted curtain body, and with the help of the retracted characteristics of the curtain body, the operating component is used to quickly squeeze out the residual liquid in the inner spray cover and the outer spray cover, thereby avoiding liquid residue. The squeezed liquid will adhere to the curtain body, heat the curtain body, and make the liquid evaporate quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a schematic diagram of the disinfection logic flow of the present invention;

[0026] Figure 2 This is a schematic diagram of the overall top view of a bedside contactless disinfection device of the present invention;

[0027] Figure 3 This is a structural schematic diagram of the curtain body of the present invention in an unfolded state;

[0028] Figure 4 This is a schematic diagram of the operating component structure of the present invention;

[0029] Figure 5 This is a schematic diagram of a top view of the connecting structure of the first moving block and the second moving block of the present invention;

[0030] Figure 6 This is a schematic structural diagram of the curtain body in the stowed state of the present invention;

[0031] Figure 7 This is a schematic diagram of the internal structure of the box of the present invention;

[0032] Figure 8 This is a schematic diagram of the folded top view of the mobile disinfection component of the present invention;

[0033] Figure 9 This is a schematic diagram of the mobile disinfection component of the present invention from a top view;

[0034] Figure 10 This is a schematic diagram of the bottom structure of the flip plate in the unfolded state of the present invention;

[0035] Figure 11 It is a schematic diagram of the movable vertical plate connection structure of the present invention.

[0036] Notes in the figure:

[0037] 1. Box body, 11. Storage box, 111. Assembly block, 12. Upper cover, 13. Three-way valve, 14. Liquid supply pump, 15. Air duct, 16. Fan, 17. Liquid replenishing valve;

[0038] 2. Operating assembly, 21. End plate, 211. First vertical slot, 212. Second vertical slot, 22. First moving block, 221. Positioning socket, 222. Positioning slot, 23. First screw, 231. Third moving block, 24. Telescopic assembly rod, 25. Second moving block, 26. Second screw, 27. Storage box, 28. Vertical partition, 281. Stop vertical plate, 282. Second avoidance slot, 29. Strap, 291. Positioning column;

[0039] 3. Transfer pipe, 31. First valve body, 32. Second valve body;

[0040] 4. Mobile disinfection component, 41. Mobile vertical plate, 411. First avoidance groove, 42. Flip plate, 421. Groove, 422. First motor, 43. First UV lamp, 44. Storage plate, 45. Expansion rack, 451. Tooth groove, 452. Second UV lamp, 46. Second motor, 47. Guide wheel;

[0041] 5. Enclosure mechanism, 51. Curtain body, 52. Inner spray hood, 53. Outer spray hood, 54. Upper guide rail, 541. Walking trough, 55. Lower guide rail. DETAILED DESCRIPTION

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0043] As an embodiment of the present invention, Figure 1 - Figure 3 As shown, the present invention provides a bedside contactless disinfection device, comprising:

[0044] The housing 1 includes a storage tank 11 for storing disinfectant. A top cover 12 is located on top of the storage tank 11. The interior of the upper cover 12 houses a gas-liquid control component for outputting disinfectant or airflow. The housing is integrated with a 2.0GHz processor using the ARM Cortex-A72 architecture. A millimeter-wave radar and an infrared thermal imaging array are located on the outer edge of the housing. The infrared thermal imaging array is preferably a FLIR Lepton 3.5 model with a 120°×90° field of view. The millimeter-wave radar is preferably a 77GHz IWR1843 industrial millimeter-wave radar chip. A level sensor is installed inside the storage tank to monitor the level of the disinfectant.

[0045] The enclosure mechanism 5 is located outside the target bed and includes a curtain 51 that can be unfolded to form a closed disinfection area, an embedded atomizing nozzle, and a UV disinfection module. The top of the curtain 51 is slidably connected to the upper guide rail 54, and the bottom is slidably connected to the lower guide rail 55. Flexible inner spray hoods 52 are provided at the top and bottom of the inner wall of the curtain 51, and an outer spray hood 53 is provided on the outer wall of the curtain 51. The spray area of the outer spray hood 53 is located in the middle of the outer wall of the curtain 51. The curtain 51 is an opaque flexible plastic structure. The inner spray hood 52 is connected to the gas-liquid control component through the adapter tube 3, and a temperature and humidity sensor model SHT35 is provided on the outer edge of the curtain. A flow sensor for monitoring the flow of disinfectant is installed in the flow channel formed by the connection between the storage box and the adapter tube.

[0046] It is understood that when the curtain 51 is pulled outward to form a closed disinfection area, the two sets of inner spray hoods 52 spray disinfectant or introduce air into the closed area. The outer spray hoods 53 are positioned outside the curtain 51. During disinfection, the inner spray hoods 52 spray disinfectant inside the curtain 51, while the outer spray hoods 53 spray disinfectant outside the curtain 51. This allows for complete disinfection of the entire ward, eliminating the need to disinfect each ward separately. Furthermore, the outer spray hoods 53 spray only in the middle of the curtain 51. This ensures that the disinfectant sprays outward, rather than toward the target beds on either side, thereby preventing it from affecting patients in other areas.

[0047] In one embodiment of the present invention, Figure 4 As shown, the proposed bedside contactless disinfection device also includes:

[0048] The operating component 2 is arranged at the outer edge of the curtain body 51, and the box body 1 is installed on the outer top of the operating component 2. During implementation, the operating component 2 positions the retracted curtain body 51, and with the help of the retracted characteristics of the curtain body 51, the operating component 2 quickly squeezes out the residual liquid in the inner spray cover 52 and the outer spray cover 53, thereby avoiding liquid residue. If the squeezed liquid adheres to the curtain body 51, the operating component 2 heats the curtain body 51 to make the liquid evaporate quickly.

[0049] As a technical concept and understanding of the present invention, it can be understood that the various defects of traditional disinfection methods affect the daily operation efficiency of hospitals and pose a threat to the health and safety of patients and medical staff.

[0050] Therefore, the present invention proposes that the processor be electrically connected to the temperature and humidity sensor, UV intensity sensor, infrared thermal imaging array, millimeter-wave radar, flow sensor, liquid level sensor, liquid supply pump, and UV disinfection module via an integrated Modbus / Profinet industrial bus interface. This enables switching between the target area's enclosure, daily ventilation, and unmanned disinfection modes. This automated control allows for rapid and precise disinfection operations, improving work efficiency while also ensuring the safety of patients and medical staff. In unmanned disinfection mode, high-intensity disinfection is performed when no one is present in the area, preventing harm to the human body from UV rays and disinfectant.

[0051] Based on the above technical concept, the specific implementation steps are as follows:

[0052] The processor initially electrically controls the operating component to slide along the upper and lower guide rails, driving the curtain to pull outward to form a closed area. This completes the enclosure closed mode and switches to the daily mode. In this daily mode, ventilation is achieved through the coordinated use of the air duct, fan and three-way valve.

[0053] The infrared thermal imaging array is set to collect the thermal radiation characteristics of the target area at a specific frame rate to obtain a sequence-level grayscale image representing the thermal imaging data of the personnel. The collected grayscale image is preprocessed and 64 key pixels are selected from the image as the region of interest (ROI). The average grayscale value of the key pixels is calculated. If the average grayscale value of a certain area is close to 1, it is considered that there is a thermal radiation characteristic of the personnel in the target area, and the thermal imaging detection probability is generated. At the same time, the instantaneous speed of each person detected by the millimeter-wave radar is extracted, the average speed of all people is calculated, and the radar detection probability is generated by comparing the absolute deviation between the instantaneous speed of each person and the average speed. , where the smaller the deviation value is, the higher the probability that people exist in the target area;

[0054] Construct a weighted fusion model: , generate the probability of people appearing in the target area , where is the thermal imaging weight coefficient, is the radar weight coefficient, η is the motion compensation factor, is the motion compensation probability, It is a Sigmoid function used to highlight the detection results of high-probability areas of thermal imaging to reduce false positives in low-grayscale areas. It is a square root function used to suppress misjudgments caused by occasional high-speed motion (such as device movement) and enhance sensitivity to regular human motion. is a hyperbolic tangent function, which is used to limit the range of the compensation term to avoid the interference of the above-mentioned occasional high-speed motion on the overall probability.

[0055] Among them, when When the decision threshold is greater than or equal to the threshold, the processor triggers the safety mechanism (e.g., the safety mechanism is triggered within 200 milliseconds), immediately cuts off the power supply of the UV disinfection module (e.g., the response time is set to ≤50ms), and simultaneously turns off the power supply of the liquid supply pump to stop spraying the disinfectant. Conversely, the disinfection operation is performed according to the disinfection parameters, and event details are written to the system log (e.g., current environmental parameters, probability of personnel presence, etc.). value and response timestamp) to ensure that the disinfection operation is terminated immediately when the presence of a person is detected, avoiding harm to the human body caused by ultraviolet rays or disinfectant.

[0056] As can be understood, by detecting the presence of people in an area, the present invention can avoid initiating UV disinfection and disinfectant disinfection in the presence of people, thereby protecting the safety of medical staff and patients. The combined use of an infrared thermal imaging array and millimeter-wave radar can detect the presence of people in an area. The infrared thermal imaging array detects the thermal radiation characteristics of the human body, while the millimeter-wave radar detects subtle movements of the human body, such as movement speed. By combining these two sets of detection data, false positives are reduced and detection reliability is improved.

[0057] When the probability of personnel existence P h When the decision threshold is calibrated by the clinical scenario experiment, the processor switches from the daily mode to the unmanned disinfection mode: the processor controls the inner spray hood and / or outer spray hood and the UV disinfection module of the enclosure mechanism to perform disinfection work in the closed area simultaneously; when the probability of personnel being present is P h When the decision threshold is reached, the processor switches from unmanned disinfection mode back to daily mode, awaiting the next disinfection command to ensure a safe and effective disinfection process. In unmanned disinfection mode, ultraviolet light and disinfectant spraying are used to thoroughly kill pathogens within the enclosed area, improving disinfection effectiveness. UV light and disinfectant can more comprehensively cover all surfaces within the enclosed area, including hard-to-reach corners, ensuring no blind spots are reached.

[0058] In one embodiment of the present invention, since environmental conditions (such as temperature and humidity) significantly impact the disinfection effectiveness during medical disinfection, increased temperature typically accelerates chemical reaction rates, thereby enhancing the disinfectant's bactericidal efficacy. For example, common chemical disinfectants (chlorine-containing disinfectants) react more quickly with pathogens at higher temperatures, destroying their cellular structures. However, disinfectants decompose or volatilize at high temperatures, reducing their effective ingredients and thus their disinfection effectiveness. For example, hydrogen peroxide readily decomposes into water and oxygen at high temperatures, losing its disinfecting power. Furthermore, in low-humidity environments, water evaporates rapidly from the surface of the disinfectant, preventing the disinfectant from fully penetrating and acting on pathogens before the surface dries, thus affecting disinfection effectiveness. Furthermore, the output intensity of ultraviolet lamps is also affected by temperature. Within an appropriate temperature range, ultraviolet lamps have a higher luminous efficiency and provide a stronger bactericidal effect. Excessively high or low temperatures reduce the output intensity of the ultraviolet lamp, further affecting its bactericidal ability.

[0059] Based on this, in order to ensure the stability and reliability of the disinfection effect, during the disinfection operation, it is necessary to dynamically adjust the disinfection parameters according to the actual environmental conditions to ensure that efficient and reliable disinfection effects can be achieved under different environmental conditions. In specific implementation, the environmental judgment conditions set are:

[0060]

[0061] Based on the determined environmental conditions, the specific process of adjusting the disinfectant spray flow rate is as follows:

[0062] A representative basic spray flow rate Q is set based on the target area and basic disinfection requirements base The standard value is in ml / m², with the basic spray flow rate Q base As a benchmark, adjust the disinfectant spray flow rate:

[0063]

[0064] That is, under low temperature and high humidity conditions, increase the spray flow rate by 20%, that is, 1.2×Q base , to cope with the dilution and reduced activity of disinfectants caused by high humidity; in normal temperature and humidity mode, keep the basic spray flow unchanged; in high temperature and low humidity mode, reduce the spray flow to 85% of the basic value, that is, 0.85×Qbase, to prevent high temperature from accelerating the volatilization of disinfectants and causing waste. In practice, basic disinfection requirements are based on industry standards.

[0065] In one embodiment of the present invention, in order to avoid waste of resources and spraying interruptions, during the disinfection process of the above-mentioned medical environment, it is also necessary to dynamically adjust the disinfectant spray flow rate according to the actual environmental conditions and the disinfectant liquid level. The principle is as follows: the disinfectant liquid level L and the spray flow rate Q in the storage tank are obtained according to the liquid level sensor and the flow sensor, and the disinfectant liquid level L and the spray flow rate Q are coordinated and controlled to ensure that the contactless disinfection device dynamically coordinates and / or controls the supply and spraying of the disinfectant, avoiding spraying interruptions due to insufficient disinfectant liquid level or waste of resources due to excessive flow. The specific process is as follows:

[0066] First, the preset liquid level threshold L th , such as the liquid level threshold L th =20%; if the current liquid level L is less than the liquid level threshold L th , then let the liquid level influence factor αL=0, trigger the refill alarm based on the processor, remind the maintenance personnel to replenish the disinfectant in time, and suspend the spraying operation at the same time to prevent the disinfection interruption or poor effect caused by insufficient liquid level; if the current liquid level L≥the liquid level threshold L th , then let αL=1, which means the liquid level is sufficient and the disinfectant spraying can be carried out normally;

[0067] Secondly, based on the liquid level influence factor αL and the adjusted spray flow Q under the current environmental conditions calc , calculate the expected spray flow Q rel :

[0068]

[0069] Where αL is the liquid level influencing factor, which is used to determine whether spraying is allowed based on whether the current liquid level is lower than the liquid level threshold. It is the ratio of the current liquid level to the liquid level threshold, which is used to further adjust the spray flow according to the current liquid level value. The current liquid level L≥the liquid level threshold L th When the ratio is 1, the spraying flow rate is not affected; the current liquid level L is less than the liquid level threshold L th When the ratio is less than 1, the expected spray flow rate Q is reduced. rel , until the liquid level in the storage tank is replenished to above the liquid level threshold;

[0070] Again, to ensure that the expected spraying flow rate is consistent with the target flow rate, it is preferred to use a PID control algorithm to adjust the speed of the liquid supply pump: Calculate the expected spraying flow rate Q rel During the disinfection process, the actual spray flow Q is obtained in real time based on the flow sensor act Error e: e=Q rel -Q act It can be understood that the error value reflects the deviation between the current actual spraying flow rate and the expected value, which is the basis for subsequent adjustments. The expected spraying flow rate Q rel and the actual spraying flow Q act Ideally, it should be consistent, but there are deviations in actual operation. Therefore, the PID control algorithm is used to adjust the speed of the liquid supply pump so that the actual spraying flow rate Q act As close as possible to the desired spray flow rate Q rel , can achieve precise flow control;

[0071] Finally, according to the error e, the adjustment amount Δu is calculated based on the PID control formula. According to the adjustment amount Δu, the speed of the liquid supply pump is adjusted accordingly through the processor to achieve precise control of the disinfectant flow rate. Among them, the speed of the liquid supply pump is positively correlated with the disinfectant flow rate. The higher the speed, the greater the flow rate.

[0072] In specific implementation, the PID control formula is calculated as follows:

[0073]

[0074] Where, is the integral variable, representing each time point from time 0 to the current time t, Kp=0.8, Ki=0.05, Kd=0.1, Kp, Ki, Kd are the proportional, integral and differential parameters of the PID controller respectively, so that the actual spraying flow Q act Close to the expected spray flow Q rel , thereby achieving precise flow control. The purpose of this process is to ensure efficient and reliable disinfection effects under different environmental conditions through automated and intelligent control methods, while optimizing resource utilization and reducing unnecessary waste.

[0075] In one embodiment of the present invention, the specific process of adjusting the power of the ultraviolet disinfection module is as follows:

[0076] First, to meet the basic disinfection requirements and have the minimum effective intensity, set a basic ultraviolet intensity I base The standard value of the basic ultraviolet intensity I baseThe standard value refers to the ultraviolet intensity output by the ultraviolet lamp under the condition of meeting the basic disinfection requirements and having the minimum effective intensity, and the unit is μW / cm². base As a benchmark, the expected UV intensity I is calculated based on the UV intensity adjustment formula under the current environmental conditions. target :I target =γ×I base , where γ is the environmental state correction coefficient, 低温高湿状态 =1.15,γ 常温常湿状态 =1.0,γ 高温低湿状态 =0.90, take I base 90μW / cm²;

[0077] Next, calculate the required disinfection time:

[0078]

[0079] Where D t The minimum value of ultraviolet energy that the target area needs to receive per unit area during the disinfection process, in μJ / cm 2 , which represents the minimum energy standard that needs to be achieved during the disinfection process to ensure that the killing rate of target pathogens (such as bacteria and viruses) reaches the expected effect. The target dose D is commonly used. t =3600μJ / cm2, e -0.015(H-55） This is the humidity correction term H, which adjusts for the effect of humidity on UV penetration. Humidity affects the spread of UV rays and the survival of pathogens. For example, high humidity increases the scattering and absorption of UV rays, reducing the disinfection effect.

[0080] So far, in the disinfection process of the medical environment, the present invention achieves efficient, safe and reliable disinfection effects through mode switching and parameter adjustment. In the enclosure closed mode, a relatively independent space is created to prevent the spread of pathogens, and on this basis, it switches to the daily mode to achieve daily ventilation. In the unmanned disinfection mode, the disinfection effect is further enhanced. At the same time, the entire process dynamically coordinates the supply and spraying of disinfectant to avoid interruptions in spraying due to insufficient liquid level or waste of resources caused by excessive flow, so as to achieve the expected disinfection standards under different environmental conditions and maintain the sanitation and safety of the ward environment.

[0081] As an embodiment of the present invention, the principle of spraying disinfectant is as follows: through the C-shaped inner spray hood 52 integrated above and below the inner wall of the plastic curtain 51, the gas-liquid control component can export the disinfectant into the inner spray hood 52, and then the inner spray hood 52 can spray the disinfectant into the enclosed area from the top and bottom. The disinfectant sprayed from the top can fall from top to bottom for three-dimensional disinfection, and finally fall on the target bed to disinfect the surface of the bed. The disinfectant sprayed from the bottom can be sprayed to the ground and the bottom of the target bed, thereby achieving comprehensive disinfection.

[0082] like Figure 7 As shown, the proposed gas-liquid control component includes a three-way valve 13, an air duct 15 and a liquid supply pump 14. The upper cover body 12 is arranged inside the storage box 11. The three-way valve 13 has three openable and closable joints, which are customized as a first joint, a second joint and a third joint. The first joint of the three-way valve 13 is plugged into the adapter tube 3 to transport the disinfectant to the inner spray cover, the second joint is connected to the liquid supply pump 14 to extract the disinfectant in the storage box, and the third joint is connected to the air duct 15. The outer end of the air duct 15 is connected to the fan 16. In specific implementation, the fan 16, liquid supply pump 14, and three-way valve 13 are all installed within the upper housing 12. The first connector protrudes from the outer edge of the upper housing after connecting to the transfer tube. The purpose of the first connector being reserved on the top surface of the upper housing 12 is to facilitate docking and connection between the first connector and the transfer tube 3 when the box body 1 rises to the top. The output end of the transfer tube 3 is sequentially provided with a first valve body 31 and a second valve body 32. The second valve body 32 is connected to the inner spray hood 52, and the first valve body 31 is connected to the outer spray hood 53. It can be understood that the C-shaped inner spray hood 52 and the outer spray hood 53 can adapt to the storage and expansion of the curtain body 51, and the deformation effect is better. The working process of the first valve body 31 and the second valve body 32 cooperating to connect the outer spray hood 53 and the inner spray hood 52 can be independently controlled by the processor to achieve independent internal or external output of the medium, or simultaneous output of the medium. The outer surfaces of the inner spray hood 52 and the outer spray hood 53 are both embedded with atomizing nozzles.

[0083] The three-way valve 13 implements the following control: in the unmanned disinfection mode, the first connector and the second connector are opened, and the liquid supply pump 14 draws disinfectant from the storage box 11, and outputs it through the first connector and the adapter tube 3 for spraying disinfection; in the daily mode, the first connector and the third connector are opened, and the fan 16 sends air into the air duct 15, and then outputs it through the first connector and the adapter tube 3 to realize air transportation.

[0084] In one embodiment of the present invention, Figure 8 - Figure 11 As shown, the proposed bedside contactless disinfection device also includes:

[0085] The mobile disinfection component 4 includes a mobile vertical plate 41 and a flip plate 42. The mobile vertical plate 41 is slidably mounted on the top of the upper guide rail 54. A first avoidance groove 411 for the curtain body 51 to pass through is provided inside the mobile vertical plate 41. The top of the flip plate 42 is rotatably connected to the top of the inner side of the mobile vertical plate 41. A UV intensity sensor is installed on the side of the flip plate. A UV disinfection module and a storage component are installed on the outside of the flip plate 42. Among them, the UV disinfection module is used to perform UV disinfection treatment in the enclosed area. When it is necessary to close and stop UV disinfection, the mobile disinfection component 4 can be moved to the appropriate position alone, and the flip plate 42 can be rotated upward to unfold for UV disinfection. When it is not necessary to disinfect bacteria, the storage component on the flip plate 42 is used to facilitate medical staff to place nursing items when performing bedside care.

[0086] During specific implementation, the top of the movable vertical plate 41 is symmetrically provided with a guide wheel 47, and the bottom surface of the upper guide rail 54 is symmetrically provided with a running groove 541 for the guide wheel 47 to be embedded. The rotation connection between the flip plate 42 and the movable vertical plate 41 is provided with a first motor 422, and an accommodating cavity is provided inside. The proposed storage component includes a storage plate 44, a UV disinfection module is installed on one side of the flip plate 42, and a groove 421 is provided on the other side. The storage plate 44 is embedded in the groove 421 to damp the rotation. When the flip plate 42 is not flipped, the movable vertical plate 41 and the flip plate 42 are L-shaped. At this time, the storage plate 44 rotates inward and unfolds. When the flip plate 42 flips upward to a horizontal position, the UV disinfection module faces downward. The medical staff pushes the movable vertical plate 41 to move the guide wheel 47 in the running groove 541. In this way, when it is necessary to place items nearby, the movable vertical plate 41 can be pushed to the nearest position, and the storage plate 44 can be rotated downward to place items such as trays on the storage plate 44. During closed disinfection, the first motor 422 drives the flip plate 42 to rotate upward to a horizontal position, so that the ultraviolet disinfection module faces downward.

[0087] In one embodiment of the present invention, to fully achieve ultraviolet disinfection, the proposed ultraviolet disinfection module includes a first ultraviolet lamp 43, a second ultraviolet lamp 452, a second motor 46, and an expansion rack 45, each having the same output power. In specific implementation, the expansion rack 45 slides into the accommodating cavity of the flip plate 42, defining the expansion rack 45 as a U-shaped cross-sectional structure. A tooth groove 451 is provided on the top surface of the expansion rack 45, and the second ultraviolet lamp 452 is mounted on the bottom surface. The first ultraviolet lamp 43 and the second motor 46 are mounted on the side of the flip plate 42, and the output end gear of the second motor 46 is meshed with the tooth groove 451.

[0088] When UV disinfection is required, the first motor 422 drives the flip plate 42 to rotate upward, causing the first UV lamp 43 to face downward. At the same time, the second motor 46 drives the expansion rack 45 to extend outward through the engagement of its output gear with the tooth groove 451 on the top surface of the expansion rack 45. The extension of the expansion rack 45 drives the second UV lamp 452 to move downward. At this time, the first UV lamp 43 and the second UV lamp 452 work synchronously to jointly perform UV disinfection on the enclosed area. As the expansion rack 45 further extends, the coverage area of the second UV lamp 452 continues to expand, effectively increasing the UV disinfection area and improving the disinfection efficiency and effectiveness.

[0089] It should be noted that in order to achieve flexible adjustment and efficient disinfection function of the ultraviolet disinfection module, the working status (output power) of the first ultraviolet lamp and the second ultraviolet lamp are uniformly managed by the control system (ARM Cortex-A72 architecture, processor with a main frequency of 2.0GHz). According to the disinfection requirements and preset programs, signals are sent to the first motor and the second motor to drive the flipping of the flip plate and the extension and retraction of the expansion rack, thereby controlling the working position and coverage range of the first ultraviolet lamp and the second ultraviolet lamp to achieve precise disinfection of the enclosed area.

[0090] In one embodiment of the present invention, Figure 5 - Figure 6 As shown, the main purpose of the operating component 2 is to constrain and position the curtain body 51 in the folded state, squeeze and dry the inner spray cover 52, and assist in the unfolding and use of the curtain body 51, thereby improving the use efficiency and operational convenience of the entire disinfection device.

[0091] During specific implementation, it includes an end plate 21, a first vertical slot 211, a second vertical slot 212 and a positioning socket 221. The top of the end plate 21 slides and is embedded in the upper guide rail 54, and the bottom slides and is embedded in the lower guide rail 55. The curtain extends outward from the end plate to form a closed area around the bed; a first vertical slot 211 is provided on one side of the outer wall of the end plate 21, and a second vertical slot 212 is provided on the other side. The second vertical slot 212 is located in the first vertical slot 211, and the first moving block 22 is slidably embedded in the first vertical slot 211. The outer wall of the first moving block 22 is provided with a positioning socket 221, and the inner wall is provided with a positioning slot 222. The internal thread of the second moving block 25 is penetrated by a second screw 26, and the second screw 26 is installed on the side wall of the end plate 21. A storage box 27 is vertically provided on the inner wall of the second moving block 25. A strap 29 is stored inside the storage box 27, and a positioning column 291 is provided at the end of the strap 29. A telescopic assembly rod 24 is provided on the inner wall of the second movable block 25. A vertical partition 28 is provided in the middle of the outer side of the end plate 21. A stopper plate 281 is perpendicularly provided at the outer end of the vertical partition 28. The end of the curtain body 51 is connected to the stopper plate 281. The stopper plate 281 is located outside the first movable block 22 and the second movable block 25. A second avoidance slot 282 is provided inside the vertical partition 28 for the telescopic assembly rod 24 to pass through. A heating wire is embedded in the inner wall of the tie band 29. When the curtain body 51 is retracted, the tie band 29 is pulled outward to restrain the exterior of the retracted curtain body 51. The positioning pin 291 is inserted into the positioning socket 221, and the end of the telescopic assembly rod 24 is inserted into the positioning slot 222. The tie band 29 moves up and down to squeeze out the liquid in the inner and outer spray hoods 52 and 53 and dry the curtain body 51.

[0092] Based on the above technical concept, it can be understood that the first movable block 22 and the second movable block 25 are usually placed at the bottom end of the end plate 21 to facilitate the binding operation. When the curtain body 51 is retracted, the curtain body 51 passes through the first avoidance groove 411 and then retracts in front of the stopper vertical plate 281. When retraction is completed, the medical staff inserts the positioning pin 291 of the strap 29 into the positioning socket 221 and then pushes the telescopic assembly rod 24 outward to insert it into the positioning slot 222. In this way, the strap 29, the first movable block 22, and the second movable block 25 form a ring-shaped whole. When the second screw 26 rotates, it drives the second movable block 25 upward along the second vertical groove 212, and then simultaneously drives the first movable block 22 and the strap 29 upward along the retracted curtain body 51. As the strap 29 moves upward, it squeezes the retracted curtain body 51, squeezing out the liquid in the inner spray hood 52 and the outer spray hood 53. After vertical lifting, the heating wire is energized, and the strap 29 generates heat, drying the curtain body 51.

[0093] In one embodiment of the present invention, to facilitate refilling of the storage box 11, the present invention further proposes providing a first screw 23 on the outside of the first vertical slot 211, a first movable block 22 vertically slidingly mounted on the first screw 23, a third movable block 231 threadedly mounted on the outer wall of the first screw 23, the third movable block 231 slidably mounted in the first vertical slot 211 and positioned above the first movable block 22, a side wall of the storage box 11 provided with an assembly block 111, the assembly block 111 being inserted into the outside of the third movable block 231 and the two being fixed by bolts, the first screw 23 being used to drive the third movable block 231 to move up and down, at which time, the refill valve 17 provided at the bottom of the storage box 11 is opened to achieve refilling of the storage box 11. In specific implementation, when the first screw 23 rotates, it does not drive the first movable block 22 to move, but only drives the third movable block 231 to move up and down. When refilling is required, the first screw 23 drives the third movable block 231 to descend, and the first connector is separated from the transfer tube 3. When it descends to the bottom, refilling is completed.

[0094] As an embodiment of the present invention, the probability P of a person appearing in the target area is calculated. h It is understood that the grayscale value of each pixel in the sequence-level grayscale image representing the thermal imaging data of the person reflects the thermal radiation intensity of the corresponding area.

[0095] In specific implementation, calculate the probability of thermal imaging detection The formula is: , where The value represents the normalized grayscale value of the i-th pixel in the sequential grayscale image, ranging from [0, 1]. 64 is the number of pixels in the region of interest (ROI) selected based on the processor's performance. The probability of a person's presence in the thermal image is measured by calculating the average pixel grayscale value in the sequential grayscale image. The higher the grayscale value, the greater the probability of a person's presence. A preferred approach is to use an ARM Cortex-A72 architecture (2.0 GHz) processor, using an embedded Linux system to call the OpenCV library for real-time image processing. The thermal imager outputs the raw grayscale image, which is then normalized (linearly mapped to the [0, 1] range) to eliminate ambient brightness differences. A Gaussian filter is then used to remove noise. Sixty-four key pixels are selected from the image as the region of interest (ROI) using either a fixed coordinate method or a dynamic thresholding method. For example, a thermal radiation intensity threshold (e.g., >0.7) is used to automatically locate high-probability areas. The summation and mean calculation of the grayscale values of the 64 pixels are then accelerated using the NEON instruction set.

[0096] Calculating radar detection probability The formula is: , where N is the number of people detected, is the instantaneous speed of the kth person, is the average speed of all personnel, is the set maximum speed threshold. At this point, by calculating the deviation between the instantaneous speed of each target and the average speed, and normalizing it to the maximum speed threshold, the stability of the movement of people detected by the radar can be measured. The smaller the deviation, the higher the probability of the presence of people. It should be noted that the instantaneous speed proposed in this embodiment reflects the actual movement state of a single target (person) at a certain moment, which is directly derived from the real-time measurement data of the radar, while the average speed is used to characterize the overall movement trend of all targets (persons) in the current area / detection scene. The calculation of the speed deviation is to measure the degree of deviation of the speed of a single target (person) from the overall trend. Generally speaking, the smaller the deviation, the more consistent the target movement pattern (such as the regularity of human gait), thereby improving the calculated confidence of the probability of the presence of people.

[0097] Example: If the radar detects three targets (people) with instantaneous speeds of 1.2m / s, 1.5m / s, and 1.8m / s (data taken from the typical walking speed range of a human body), the average speed is 1.5m / s. The absolute deviations of the speeds of each target (person) from the average speed are 0.3m / s, 0m / s, and 0.3m / s, respectively, normalized to the preset maximum speed threshold. After that, the radar detection probability calculation result is As it approaches a low value (small deviation), the system determines that the probability of human presence increases.

[0098] Generate the probability of personnel existence In the process, α is the thermal imaging weight coefficient set according to the importance of infrared thermal imaging array in personnel detection, β is the radar weight coefficient set according to the importance of millimeter wave radar in detecting personnel movement, and η is the motion compensation factor that compensates for the impact of personnel movement on the detection results. imu The intensity of a person's movement is measured by calculating the root mean square value of their movement speed and acceleration, and then normalized using the radar detection angle compensation coefficient to obtain the motion compensation probability.

[0099] Among them, calculate the motion compensation probability The specific process is:

[0100] Collect acceleration data of people's movements at a high sampling rate and store it as a time series array , and then use MATLAB or Python software to calculate the root mean square (RMS) value of acceleration: , to quantify the intensity of the person's movement, and then combine the radar detection angle compensation coefficient , through the normalization formula , which is converted into a compensation probability in the range of 0 to 1, where RMS maxIt is the preset maximum RMS value. In specific implementation, it is preferred to use the NumPy library to calculate the RMS value, use Pandas to process the data, and finally use the Matplotlib library to visualize the results to assist in analyzing the impact of personnel movement on detection.

[0101] In one embodiment of the present invention, the determination of the aforementioned thermal imaging weight coefficient α, radar weight coefficient β, and motion compensation factor η requires comprehensive consideration of sensor performance, environmental conditions, and actual application requirements. Generally, the values of α and β are based on the effectiveness and reliability of the sensor in personnel detection and are optimized through experimental calibration and data analysis. When detecting static personnel, the thermal imaging weight α is set to 0.6, highlighting its advantage in identifying stationary targets; when detecting moving personnel, the radar weight β is set to 0.5, highlighting its ability to capture motion information. The motion compensation factor η is dynamically adjusted based on the intensity of the person's movement and the compensation requirements for the radar detection angle. The value generally ranges from 0.1 to 0.3. It is used to correct the impact of motion on the detection results and improve detection accuracy.

[0102] Table 1 shows experimental data on the impact of weight coefficients on the probability of person presence detection. The experimental data acquisition process is as follows: a. A dataset consisting of 200 clinical scenario data sets (static and dynamic people, equipment interference, and rapid motion); b. Evaluation metrics: detection probability (Ph ≥ 0.3 for effective detection), false alarm rate (false trigger rate when no person is present), and missed detection rate (missed detection rate when a person is present); c. A grid search was performed using the parameters α∈[0.5, 0.7], β∈[0.2, 0.6], and η∈[0.1, 0.3] to identify the optimal combination for overall performance. Conclusion: Experimental data validates that the optimal weight configuration is α = 0.6, β = 0.5, and η = 0.2. The synergistic effect of static person detection (α-dominated) and regular motion (β-dominated) is significant. The compensation factor η effectively compensates for rapid motion interference. Calibration using multi-scenario data balances sensor performance with environmental interference, ensuring both detection accuracy and safety.

[0103] Table 1

[0104]

[0105] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0106] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A bedside contactless disinfection device, characterized in that: include: The box has a built-in liquid supply pump for delivering disinfectant, and is integrated with a processor, millimeter-wave radar and infrared thermal imaging array; The enclosure mechanism includes a curtain body and an embedded atomizing nozzle and a UV disinfection module connected to the curtain body; An operating assembly is provided at the outer edge end of the curtain, and the operating assembly includes an end plate, a first vertical slot, a second vertical slot and a positioning socket, wherein the curtain body extends outward from the end plate to form a closed area surrounding the bed, the top of the end plate is slidably embedded in the upper guide rail, and the bottom is slidably embedded in the lower guide rail, one side of the outer wall of the end plate is provided with a first vertical slot, and the other side is provided with a second vertical slot; the second vertical slot is located inside the first vertical slot, and a first moving block is slidably embedded inside the first vertical slot, the outer wall of the first moving block is provided with a positioning socket, and the inner wall is provided with a positioning slot, the internal thread of the second moving block is penetrated by a second screw, the second screw is installed on the side wall of the end plate, a storage box is vertically provided on the inner wall of the second moving block, and a strap is stored inside the storage box; The end of the strap is provided with a positioning pin, the inner wall of the second moving block is also provided with a telescopic assembly rod, a vertical partition is provided in the middle of the outer side of the end plate, the outer end of the vertical partition is vertically provided with a stop vertical plate, the end of the curtain body is connected to the stop vertical plate, the stop vertical plate is located on the outer side of the first moving block and the second moving block, and a second avoidance groove for the telescopic assembly rod to pass through is opened inside the vertical partition; when the curtain body is folded, the strap is pulled outward and constrained to the outside of the curtain body in the folded state, the positioning pin is inserted into the positioning socket, and the end of the telescopic assembly rod is inserted into the positioning slot, and the strap is lifted and lowered to squeeze out the disinfectant in the inner spray cover and the outer spray cover; The processor is connected to the infrared thermal imaging array, millimeter wave radar, liquid supply pump and ultraviolet disinfection module to ensure the safety and effectiveness of the disinfection process. The process is as follows: The infrared thermal imaging array is set to collect the thermal radiation characteristics of the target area at a specific frame rate to obtain a sequence-level grayscale image representing the thermal imaging data of the personnel. The collected grayscale image is preprocessed, and 64 key pixels are selected from the grayscale image as the region of interest. The average grayscale value of the key pixels is calculated. If the average grayscale value of a certain area is close to 1, it is considered that there is a thermal radiation characteristic of the personnel in the target area, and the thermal imaging detection probability P is generated. th ; Extract the instantaneous speed of each person detected by the millimeter-wave radar, calculate the average speed of all people, and generate the radar detection probability P by comparing the absolute deviation between the instantaneous speed of each person and the average speed. rd , where the smaller the deviation value is, the higher the probability that people exist in the target area; Construct a weighted fusion model: , generate the probability P of people appearing in the target area h , where α is the thermal imaging weight coefficient, β is the radar weight coefficient, η is the motion compensation factor, P imu is the motion compensation probability, is the Sigmoid function; when P h When the value exceeds the decision threshold, the processor triggers the safety mechanism, immediately cuts off the power supply of the UV disinfection module, and simultaneously turns off the power supply of the liquid supply pump to stop spraying the disinfectant. Otherwise, the disinfection operation is performed according to the disinfection parameters.

2. A bedside contactless disinfection device according to claim 1, characterized in that: Calculate the motion compensation probability P imu The specific process is as follows: First, the acceleration data of personnel movement is collected at a high sampling rate and stored as a time series array. ; Secondly, use MATLAB or Python software to calculate the root mean square value of acceleration: ; Finally, combined with the radar detection angle compensation coefficient , through the normalization formula , convert it into a compensation probability in the range of 0 to 1, where is the preset maximum RMS value.

3. The bedside contactless disinfection device according to claim 1, characterized in that: The enclosure mechanism further includes: an upper guide rail and a lower guide rail respectively connected to the upper and lower ends of the curtain body in a sliding manner, wherein an inner spray cover is provided on the inner wall of the curtain body, and the inner spray cover is connected to the gas-liquid control component through a transfer pipe; A movable vertical plate is slidably installed on the top of the upper guide rail, and the inner side of the movable vertical plate is rotated to connect a flip plate for installing the ultraviolet disinfection module; The top of the movable vertical plate is symmetrically provided with a guide wheel, and the bottom surface of the upper guide rail is symmetrically provided with a walking groove for the guide wheel to be embedded; a first motor is provided at the rotation connection between the flip plate and the movable vertical plate to drive the flip plate to flip, thereby realizing the deployment and folding of the ultraviolet disinfection module; The ultraviolet disinfection module includes a first ultraviolet lamp, a second ultraviolet lamp, a second motor and an expansion frame. The expansion frame is slidably embedded in the accommodating cavity opened inside the flip plate. A tooth groove is opened on the top surface of the expansion frame, and the second ultraviolet lamp is installed on the bottom surface. The first ultraviolet lamp, the second motor and the ultraviolet intensity sensor are respectively installed on the side of the flip plate. The output end gear of the second motor is engaged with the tooth groove to adjust the working range and disinfection coverage area of the ultraviolet disinfection module; The ultraviolet intensity sensor is electrically connected to the processor.

4. A bedside contactless disinfection device according to claim 3, characterized in that: The gas-liquid control component includes a three-way valve and an air duct. Three connectors are installed at the ports of the three-way valve, which are customized as the first connector, the second connector, and the third connector. The first connector is plugged into the adapter tube to deliver the disinfectant to the inner spray cover. After the first connector is connected to the adapter tube, it protrudes from the outer edge of the upper cover body provided on the top of the box body. The output end of the adapter tube is sequentially provided with a first valve body and a second valve body. The second valve body is connected to the inner spray cover, and the first valve body is connected to the outer spray cover provided on the outside of the curtain body. The second connector is connected to the liquid supply pump to pump out the disinfectant; The third joint is connected to the air duct to realize air transportation. A liquid level sensor for monitoring the liquid level of the disinfectant is installed inside the box, and a flow sensor for monitoring the spray flow of the disinfectant is installed in the flow channel formed by connecting with the transfer pipe; The liquid level sensor and the flow sensor are electrically connected to the processor.

5. The bedside contactless disinfection device according to claim 1, characterized in that: The outer edge of the curtain is provided with a temperature and humidity sensor electrically connected to the processor. During the disinfection operation, the processor obtains the temperature T and humidity H data of the target area in real time through the temperature and humidity sensor, determines the current environmental state based on the preset environmental judgment conditions, dynamically adjusts the disinfection parameters, and then performs the disinfection operation to ensure that the disinfection effect is optimal; The preset environmental judgment conditions are: .

6. The bedside contactless disinfection device according to claim 5, characterized in that: The disinfection parameters include the disinfectant spray flow rate and the UV disinfection module power; wherein, the specific process of adjusting the disinfectant spray flow rate is: Set a representative basic spray flow rate Q base The standard value is used as a benchmark to adjust the spray flow rate of the disinfectant: ; The specific process of adjusting the power of the UV disinfection module is as follows: First, set a basic UV intensity I base The standard value of the basic ultraviolet intensity I base As a benchmark, the expected UV intensity I is calculated based on the UV intensity adjustment formula under the current environmental conditions. target :I target =γ×I base , where γ is the environmental state correction coefficient, 低温高湿状态 =1.15,γ 常温常湿状态 =1.0,γ 高温低湿状态 =0.90, take I base 90μW / cm²; Next, calculate the required disinfection time: , where D t The minimum value of ultraviolet energy that needs to be received per unit area during the disinfection process, in μJ / cm 2 , e -0.015(H-55） It is the humidity H correction item of the current environment, which is used to adjust the effect of humidity on ultraviolet penetration.

7. A bedside contactless disinfection device according to claim 4 or 6, characterized in that: In the specific process of adjusting the disinfectant spray flow rate, it is necessary to complete the coordinated control constraints of the disinfectant liquid level L and the spray flow rate Q. The specific process is as follows: First, the preset liquid level threshold L th , if the current liquid level L<the liquid level threshold L th , then let the liquid level influence factor αL=0, trigger the liquid replenishment alarm based on the processor, and suspend the spraying operation at the same time; if the current liquid level L≥liquid level threshold L th , then let αL=1 and spray the disinfectant normally; Secondly, based on the liquid level influence factor αL and the adjusted spray flow Q under the current environmental conditions calc , calculate the expected spray flow Q rel : , where is the ratio of the current liquid level to the liquid level threshold, the current liquid level L≥the liquid level threshold L th When the ratio is 1, the current liquid level L is less than the liquid level threshold L. th When the ratio is less than 1, the expected spray flow rate Q is reduced. rel , until the tank liquid level is replenished to above the liquid level threshold; Again, calculate the expected spray flow rate Q rel During the disinfection process, the actual spray flow Q is obtained in real time based on the flow sensor act Error e between: e=Q rel -Q act ; Finally, according to the error e, the adjustment amount Δu is calculated based on the PID control formula, and according to the adjustment amount Δu, the speed of the liquid supply pump is adjusted by the processor.

8. The bedside contactless disinfection device according to claim 1, characterized in that: A first screw is provided on the outer side of the first vertical slot, and the first moving block is vertically slidably sleeved on the first screw; The outer wall of the first screw is threadedly sleeved with a third moving block, which is slidably installed in the first vertical groove and is located above the first moving block. The side wall of the box is provided with an assembly block, which is inserted into the outer side of the third moving block and the two are fixed by bolts; the first screw drives the third moving block to move up and down to facilitate fluid replenishment in the box.

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