An automatic sensor faucet and its control method

Abstract

This invention discloses an automatic sensor faucet and its control method, relating to the field of intelligent control technology for water-saving equipment. The method includes the following steps: during the automatic sensor faucet control process, infrared reflection signals, ambient brightness, and the reflectivity of the decorative surface are collected. A reflection distribution map is generated based on the collected data. The concentrated area of ​​specular reflection is determined based on the reflection distribution map, and an initial sensing angle scheme is formed. This invention dynamically controls the infrared signal propagation path through the reflection distribution map, and effectively suppresses multipath echo interference by synchronously adjusting the emission angle and receiving window. It also weakens optical reflection through polarization angle control and anti-reflection coating, and adaptively configures sensitivity and trigger threshold, resulting in stable valve operation and reduced energy consumption, achieving precise sensing and energy-saving control in high-reflection environments.

Description

Technical Field

[0001] This invention relates to the field of intelligent control technology for water-saving equipment, specifically to an automatic sensor faucet and its control method. Background Technology

[0002] Automatic sensor faucet control is an intelligent control method that automatically detects the approach or departure of a user, thereby controlling the water flow on and off. Its core principle lies in using infrared, ultrasonic, or capacitive sensors to monitor spatial changes in real time. When a human hand or object is detected entering the sensing area, the system controls a solenoid valve and water circuit components to open the water flow; when the detected object leaves, the system closes the solenoid valve after a delay via a control circuit, stopping the water flow. This control process typically combines flow monitoring, temperature detection, and water-saving logic. Through the coordinated adjustment of the valve body and water circuit components, precise control of water flow time, flow rate, and temperature is achieved, thus completing water supply and shut-off actions without contact. This technology is widely used in public restrooms, hospitals, laboratories, and home smart bathroom systems, combining automation, energy saving, and hygiene safety features.

[0003] The existing technology has the following shortcomings:

[0004] In existing technologies, automatic sensor faucets typically determine whether a user has entered the sensing area by transmitting and receiving infrared signals. However, in practical applications, when highly reflective decorative materials such as mirrors, stainless steel, or glazed tiles are present near the sensing area, the infrared signal is easily reflected multiple times, resulting in overlapping spatial echoes. In this case, the receiver may misinterpret the multipath reflected signals as a continuously present target, leading to multiple false trigger points in the system. Because the reflected light creates superimposed interference at different angles and distances, the control unit cannot accurately identify the true sensing state, causing the faucet to continuously dispense water or frequently start and stop. This type of interference is particularly noticeable in scenarios with strong lighting, incorrect installation angles, or numerous reflective surfaces, easily leading to serious consequences such as water waste, solenoid valve overheating, and control system malfunctions, becoming a stability vulnerability that is difficult to avoid in existing technologies.

[0005] The information disclosed in the background section is only intended to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide an automatic sensor faucet and its control method to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an automatic sensor faucet control method, comprising the following steps:

[0008] During the automatic sensor faucet control process, infrared reflection signals, ambient brightness, and reflectivity of decorative surfaces are collected. A reflection distribution map is generated based on the collected data. The concentrated area of ​​mirror reflection is determined based on the reflection distribution map, and an initial sensing angle scheme is formed.

[0009] Based on the initial sensing angle scheme, the infrared emission range and infrared receiving window are synchronously adjusted, and alternating deflection actions are executed according to the set rhythm to generate a multipath reflection suppression scheme, so that the correspondence between the infrared signal direction distribution and the reflection distribution map is corrected.

[0010] Based on the multipath reflection suppression scheme, polarization angle control is superimposed and anti-reflection coating is applied to the high reflection area to form a polarization-corrected reflection signal distribution result. This distribution result is then written back to the reflection distribution map to generate an updated echo region map.

[0011] Based on the updated echo region map, the infrared sensor sensitivity, delay response time and water outlet trigger threshold are reconfigured to generate a valve action sequence table, so that the action timing in the valve action sequence table matches the signal response rhythm corresponding to the updated echo region map.

[0012] Based on the valve action sequence table, the system continuously performs infrared emission angle cruise adjustment, polarization angle alternation switching, and sensor sensitivity fine adjustment. The adjustment results are used to dynamically correct the reflection distribution map and output a stable water output time series and energy consumption record, thereby achieving stable control of the automatic sensor faucet in a high-reflection environment.

[0013] The preferred initial sensing angle formation process is as follows:

[0014] For the installation environment of automatic sensor faucets, infrared reflection signals, ambient brightness and reflectivity of decorative surfaces are collected, and the infrared signal intensity, ambient brightness value and reflectivity value are recorded in a fixed coordinate system to generate three-dimensional spatial reflection data for optical modeling.

[0015] Based on the spatial correspondence between infrared reflection signals, ambient brightness, and reflectivity of decorative surfaces, a normalized mapping is performed and a light energy density field is superimposed to construct a reflection distribution map to express the spatial relationship between the infrared emission direction and the reflected echo.

[0016] Based on the reflection distribution map, identify areas with concentrated energy density and sustained echo intensity, and combine the ambient brightness distribution and the trend of reflectivity variation of the decorative surface to determine the concentrated areas of specular reflection.

[0017] Based on the spatial distribution of the concentrated area of ​​specular reflection, an initial sensing angle scheme is formed, the optimal angle combination of infrared emission direction and infrared reception direction is determined, and the effective detection boundary of the sensing area is defined.

[0018] The preferred steps for generating a multipath reflection suppression scheme are as follows:

[0019] Based on the initial sensing angle scheme, an angle mapping relationship between the infrared emission direction and the reflection distribution map is established, and the angle segment overlapping with the high reflection area in the infrared emission range is determined according to the energy density distribution information.

[0020] Based on the angle mapping relationship, the infrared emission range and the infrared receiving window are synchronously adjusted to make the emission direction and the receiving direction form a spatial intersection area and maintain continuous coverage.

[0021] The infrared signal is distributed alternately in time and direction in space according to a preset angle and rhythm to reduce multipath overlap.

[0022] The infrared emission and reception directions are corrected for directional distribution. Based on the energy gradient of the reflection distribution map, the optimal directional combination is determined, and a multipath reflection suppression scheme is generated.

[0023] Preferably, the execution of the alternating deflection action takes the initial sensing angle scheme as the reference starting point. When the infrared emission direction deflects within the set angle range, the infrared receiving direction is adjusted in the opposite direction according to the same deflection amplitude, so that the infrared signal forms a continuous coverage sequence in the spatial path, so as to ensure that the energy change of the infrared signal direction distribution and the reflection distribution map remain synchronized during the multipath reflection suppression process.

[0024] Preferably, the steps for generating the updated echo region map are as follows:

[0025] Based on the multipath reflection suppression scheme, the relationship between the propagation direction of the infrared signal and the reflection angle is analyzed, and the polarization angle control parameters are determined according to the reflection characteristics of different material surfaces, so that the infrared signal changes the energy distribution of the reflected wave when incident on a highly reflective surface.

[0026] While implementing polarization angle control, an anti-reflection coating is applied to the high-reflection area to reduce the intensity of reflected light and maintain continuous energy transition by changing the refractive difference at the interface between the incident light and the reflecting surface.

[0027] The polarization-corrected infrared signal distribution is reconstructed, and a new reflected signal distribution result is generated based on the spatial distribution location and energy density.

[0028] The polarization-corrected reflected signal distribution results are written back to the reflection distribution map, the energy layer structure is updated, and an updated echo region map is generated.

[0029] Preferably, the polarization angle is synchronously adjusted according to the spatial combination of the infrared emission direction and the receiving direction, so that the infrared signal forms a directional polarization distribution under different incident angle conditions. By alternating the polarization angle, the intensity ratio of the parallel component and the perpendicular component in the reflected light is changed, thereby achieving the dispersion and attenuation of reflected energy in the high reflection area and improving the stability of the updated reflection distribution map.

[0030] Preferably, the steps for generating the valve action sequence table are as follows:

[0031] After generating the updated echo region map, the infrared sensing sensitivity is reconfigured according to the infrared signal energy distribution and time response characteristics of each sensing region, so that the response capability of the sensing region is consistent with the light energy distribution state.

[0032] After completing the infrared sensor sensitivity configuration, the delay response time is reset based on the signal return time and reflection stability of the updated echo region map to ensure that the infrared signal triggering and valve response are coordinated in timing.

[0033] After configuring the delay response time, set the water discharge trigger threshold based on the sensitivity and delay results to match the triggering conditions with the spatial reflection energy distribution.

[0034] Based on the reconfigured infrared sensing sensitivity, delay response time, and outlet trigger threshold, a valve action sequence table is generated to ensure that the action timing is consistent with the signal response rhythm corresponding to the updated echo area map.

[0035] Preferably, during the reconfiguration of infrared sensing sensitivity and the setting of delay response time, the energy density gradient in the updated echo region map is used as a parameter. The optical receiving threshold and response time are adjusted by partitioning to make the infrared signal triggering conditions continuously distributed in different reflection regions, so that the action sequence in the valve action sequence table and the energy change of the infrared signal propagation path remain dynamically consistent.

[0036] Preferably, based on the valve action sequence table, the following steps are taken to perform infrared emission angle cruise adjustment, polarization angle alternating switching, and sensor sensitivity fine adjustment, and to dynamically correct the reflection distribution map using the adjustment results, outputting the effluent time series and energy consumption record results:

[0037] The infrared emission angle is adjusted by cruise control according to the time sequence of the valve action sequence table, so that the infrared emission direction forms continuous coverage in space and corresponds to the updated echo area map.

[0038] After completing the cruise adjustment of the infrared emission angle, the polarization angle is switched alternately to make the infrared light form an alternating polarization distribution in space to weaken the echo superposition effect.

[0039] Based on the alternating switching of polarization angles, the sensing sensitivity is finely adjusted to keep the sensing sensitivity matched with the real-time optical feedback and balance the energy distribution;

[0040] The reflection distribution map is dynamically corrected based on the results of infrared emission angle cruise adjustment, polarization angle alternation switching and sensor sensitivity refinement adjustment, and a stable water output time series and energy consumption record results are output.

[0041] An automatic sensor faucet includes a reflection distribution map generation module, a multipath reflection suppression module, a polarization and anti-reflection optimization module, a sensitivity and valve configuration module, and an adaptive optimization execution module.

[0042] The reflection distribution map generation module collects infrared reflection signals, ambient brightness, and reflectivity of decorative surfaces during the automatic sensor faucet control process. Based on the collected data, it generates a reflection distribution map, determines the concentrated area of ​​mirror reflection based on the reflection distribution map, and forms an initial sensing angle scheme.

[0043] The multipath reflection suppression module adjusts the infrared emission range and infrared receiving window synchronously according to the initial sensing angle scheme, and performs alternating deflection actions according to the set rhythm to generate a multipath reflection suppression scheme, thereby correcting the correspondence between the infrared signal direction distribution and the reflection distribution map.

[0044] The polarization and anti-reflection optimization module, based on the multipath reflection suppression scheme, superimposes polarization angle control and applies anti-reflection coating treatment to the high reflection area to form a polarization-corrected reflection signal distribution result. This distribution result is then written back to the reflection distribution map to generate an updated echo region map.

[0045] The sensitivity and valve configuration module reconfigures the infrared sensing sensitivity, delay response time and water outlet trigger threshold according to the updated echo area map, and generates a valve action sequence table so that the action timing in the valve action sequence table matches the signal response rhythm corresponding to the updated echo area map.

[0046] The adaptive optimization execution module, based on the valve action sequence table, continuously performs infrared emission angle cruise adjustment, polarization angle alternating switching, and sensor sensitivity fine adjustment. It uses the adjustment results to dynamically correct the reflection distribution map and output a stable water output time series and energy consumption record results, thereby achieving stable control of the automatic sensor faucet in a high-reflection environment.

[0047] The technical effects and advantages provided by the present invention in the above technical solution are as follows:

[0048] This invention constructs a dynamic sensing control mechanism based on a reflection distribution map, continuously correcting the propagation path of infrared signals under different reflection environments, effectively reducing multipath echo interference caused by highly reflective materials. By synchronously adjusting the infrared emission angle and the receiving window, the directional distribution of the infrared signal maintains a real-time correspondence with the spatial reflection characteristics, thereby avoiding false triggering and delayed triggering problems, ensuring the continuity and accuracy of sensing judgment, and enabling the faucet to maintain a stable water flow response even in complex lighting and reflective environments.

[0049] This invention weakens optical interference in high-reflection areas through polarization angle control and anti-reflection coating. Combined with adaptive configuration of sensitivity, delay response, and water outlet trigger threshold, it ensures coordinated valve action and signal feedback. During operation, the system automatically adjusts control parameters based on echo changes, achieving a smooth transition between water flow opening and closing, reducing energy consumption fluctuations and solenoid valve load, and improving the water-saving performance and reliability of automatic sensor faucets over long-term operation. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0051] Figure 1 This is a flowchart of an automatic sensor faucet control method according to the present invention.

[0052] Figure 2 This is a schematic diagram of an automatic sensor faucet according to the present invention. Detailed Implementation

[0053] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that the description of this disclosure will be more complete and fully convey the concept of the exemplary embodiments to those skilled in the art.

[0054] This invention provides, for example Figure 1 An automatic sensor faucet control method is shown, comprising the following steps:

[0055] During the automatic sensor faucet control process, infrared reflection signals, ambient brightness, and reflectivity of decorative surfaces are collected. A reflection distribution map is generated based on the collected data. The concentrated area of ​​mirror reflection is determined based on the reflection distribution map, and an initial sensing angle scheme is formed.

[0056] To achieve accurate identification and optical characteristic modeling of the reflective environment, a reflection distribution map is constructed by collecting infrared reflection signals, ambient brightness, and the reflectivity of the decorative surface. Based on this map, the concentrated areas of specular reflection are determined, and an initial sensing angle scheme is formed. The specific implementation steps are as follows:

[0057] A multi-dimensional reflection data acquisition process was established for the installation environment of automatic sensor faucets. In this process, an infrared transmitter emits infrared signals within the sensing area at a fixed angle sequence, and the receiver simultaneously records the infrared echo intensity under different incident and reflection angles. Simultaneously, a photosensitive element measures the ambient brightness distribution in real time, and light density changes under different illumination conditions are distinguished by brightness levels. Furthermore, during the data acquisition phase, the reflectivity of decorative surfaces within the sensing area is collected. The reflectivity data originates from the light reflection characteristics of the surface materials, including stainless steel, mirrored glass, and glazed ceramics. By simultaneously recording the infrared signal intensity, ambient brightness value, and reflectivity value at each detection point in space under a fixed coordinate system, a complete three-dimensional spatial reflection data matrix is ​​obtained, providing the input basis for the subsequent generation of a reflection distribution map.

[0058] After acquiring raw data on infrared reflection signals, ambient brightness, and the reflectivity of the decorative surface, the data is normalized and mapped according to spatial coordinates to establish a spatial correlation of environmental optical characteristics. This step involves superimposing the infrared signal intensity distribution with the ambient brightness gradient distribution to form a light energy density field within the sensing area. In this light energy density field, each coordinate point contains both infrared signal intensity and ambient brightness components, reflecting the coupling relationship between light propagation and reflection in a local area. Subsequently, the reflectivity parameter of the decorative surface is introduced into this distribution field, making the light energy reflection path more concentrated in areas with high reflectivity. By spatially layering and mapping these multidimensional parameters, a reflection distribution profile representing the trend of reflected energy variation is obtained. This profile identifies the reflection characteristics of each surface within the sensing area in the form of different color levels or intensity gradients, clearly expressing the spatial correspondence between the infrared emission direction and the reflected echo. This process ensures that each reflection feature point has a traceable energy distribution trajectory in space, providing data support for subsequent identification of areas with concentrated specular reflection.

[0059] After generating the reflection distribution map, regions with significantly concentrated energy density and consistently high echo intensity are identified to determine the spatial location of specular reflection concentration areas. Specifically, by comparing the continuity of infrared echo signal intensity variations in space across different regions, it can be determined which locations meet the specular reflection conditions. Specular reflection concentration areas are typically characterized by high energy reflection density, where the reflection angle of the infrared signal strongly correlates with the incident angle. To further ensure accuracy, the ambient brightness distribution and surface reflectivity variation trends are considered simultaneously when identifying specular reflection concentration areas, fully reflecting the stable reflection characteristics of infrared signals under varying illumination conditions. This comprehensive approach clearly defines the areas prone to multipath reflection within the sensing region, and their location and orientation attributes are marked in the spatial model, providing a clear reference for subsequent sensing angle planning.

[0060] Based on the identified areas of concentrated specular reflection, an initial sensing angle scheme is formulated. This scheme uses the reflection distribution map as a core reference, analyzing the spatial gradient direction of the reflected energy distribution to determine the optimal combination of the infrared emitting angle and the infrared receiving angle. This ensures that the infrared signal propagation path avoids areas of high reflectivity, thereby reducing the formation of multipath echoes. When formulating the initial sensing angle scheme, the geometry of the sensing area, the installation height of the infrared emitting device, and the average distribution of ambient brightness are also considered to ensure a stable balance in the optical relationship between the infrared emission direction, the receiving direction, and the reflection path. This sensing angle scheme not only defines the infrared signal emission range and receiving window but also determines the effective detection boundary of the sensing area, thus providing the foundation for reflection suppression, sensitivity adjustment, and valve response control in subsequent control steps.

[0061] Based on the initial sensing angle scheme, the infrared emission range and infrared receiving window are synchronously adjusted, and alternating deflection actions are executed according to the set rhythm to generate a multipath reflection suppression scheme, so that the correspondence between the infrared signal direction distribution and the reflection distribution map is corrected.

[0062] To ensure the infrared signal transmission direction corresponds to the energy distribution of each reflection region in the reflection map and to establish a stable directional control process along the optical path, the infrared transmission range and infrared receiving window are synchronously adjusted at different angles, and alternating deflection actions are performed according to a set rhythm, thereby generating a multipath reflection suppression scheme. This process, through dynamic coordination of angles and correction of the signal path's directional distribution, ensures that the optical channels for infrared transmission and reception match the spatial energy distribution of the reflection map, reducing interference caused by multipath echoes. The specific implementation steps are as follows:

[0063] Based on the initial sensing angle scheme, an angular mapping relationship between the infrared emission direction and the reflection distribution map is established. In this stage, by reading the energy density distribution information in the reflection distribution map, the light energy intensity of the reflection region corresponding to each emission angle is determined. For regions with high energy density, the spatial coordinates and corresponding reflection directions of these regions are determined. Combined with the infrared emission direction in the initial sensing angle scheme, the angular difference between the infrared emission path and the concentrated reflection energy region is calculated, thus identifying the angular segments in the infrared emission range that may overlap with high-reflection regions. In this way, an angular matching relationship between the emission direction and the reflection region can be established in the spatial model, providing a precise basis for subsequent emission range adjustments. In this stage, the boundaries of the infrared emission range and the opening range of the infrared receiving window are both based on the reflection distribution map, ensuring that subsequent adjustments are guided by actual reflection characteristics.

[0064] After obtaining the correspondence between the emission direction and the reflection area, the infrared emission range and the infrared receiving window are adjusted synchronously at different angles. The core of this synchronous angle adjustment lies in maintaining coordinated angular deflection between the transmitter and receiver, ensuring a stable spatial intersection zone for the infrared signal along the emission and reception paths. During the adjustment process, the transmitter uses the initial sensing angle scheme as a reference and gradually changes the emission direction of the infrared light through minute angular offsets. The receiver, in turn, adjusts its angle synchronously according to the emission angle offset, ensuring that the coverage area of ​​the receiving window along the emission path remains within the target sensing area. Through multiple synchronous adjustments, the infrared emission beam and the receiving channel can form a continuous overlapping band in space, thereby achieving stable transmission of the infrared signal path. This synchronous adjustment not only eliminates angular deviations between the emission and reception directions but also avoids reflection concentration at fixed angles through continuous angular changes, resulting in a more balanced spatial distribution of infrared light energy.

[0065] After synchronizing the transmission range and receiving window angles, an alternating deflection action is executed according to a preset angle rhythm. The alternating deflection action refers to the periodic deflection of the infrared transmission and receiving directions according to a set angle variation pattern, allowing the infrared signal to scan at different angles, thereby effectively reducing multipath overlap caused by specular reflection. The execution of the alternating deflection action uses the initial sensing angle scheme as a reference starting point and allocates the angle rhythm according to the spatial reflection characteristics in the reflection distribution map. Each deflection aims to avoid high-reflection areas. When the transmission direction deflects within a certain angle range, the receiving direction adjusts in the opposite direction with the same deflection amplitude, creating an alternating distribution of the infrared signal in time and direction across different spatial paths. Through the periodic deflection rhythm, the infrared signal forms a continuous coverage sequence in space, thereby reducing reflection overlap at fixed angles. The continuous execution of the alternating deflection action ensures that the infrared signal avoids high-energy reflection areas in each transmission cycle, thus achieving dispersion and energy equalization of the reflection path.

[0066] After completing the alternating deflection maneuver, the signal paths formed in space by the transmission and reception directions are corrected in terms of directional distribution to generate a multipath reflection suppression scheme. This correction process determines the optimal combination of each transmission and reception direction by comparing the differences in the distribution of infrared signals in the spatial path before and after deflection, ensuring that the main reflection path of the infrared signal avoids areas of concentrated specular reflection. By comparing the adjusted directional distribution results with the energy gradient in the reflection distribution map, it can be identified which directional combinations have lower echo energy density, thus determining these directions as preferred sensing direction combinations. Then, based on these preferred directions, a new directional distribution relationship is formed, making the spatial relationship between the infrared transmission range and the infrared reception window more reasonable. The result of this directional distribution correction constitutes the core of the multipath reflection suppression scheme, signifying that the correspondence between the infrared signal direction and the reflection distribution map has been corrected. Through this process, the energy distribution in space of the infrared signal transmission and reception directions tends to be uniform, the high-energy overlapping areas in the reflection path are weakened, and the sensing judgment in faucet control becomes more stable.

[0067] Based on the multipath reflection suppression scheme, polarization angle control is superimposed and anti-reflection coating is applied to the high reflection area to form a polarization-corrected reflection signal distribution result. This distribution result is then written back to the reflection distribution map to generate an updated echo region map.

[0068] After establishing the multipath reflection suppression scheme, to further reduce energy echo interference of infrared signals in high-reflection areas and optimize the light propagation direction, polarization angle control and anti-reflection coating are superimposed to induce directional attenuation and reflection suppression of the infrared signal along the propagation path, resulting in a polarization-corrected reflection signal distribution. Subsequently, the corrected signal distribution is written back to the reflection distribution map to generate an updated echo region map, enabling subsequent sensing control to dynamically adapt to the updated optical environment model. The specific implementation steps are as follows:

[0069] Based on the multipath reflection suppression scheme, the relationship between the propagation direction and reflection angle of the infrared signal in space is re-analyzed to determine the initial parameters for polarization angle control. This stage uses the spatial combination of the infrared emission and reception directions formed in previous steps as a reference. By analyzing the energy echo characteristics of each emission path in the high-reflection region, the polarization state of the light wave at a specific reflection angle is extracted. For different surface materials, such as metal surfaces, glazed ceramic surfaces, and glass surfaces, the intensity ratio of the parallel and perpendicular components in their reflected light is determined. After understanding these ratios, a specific polarization angle is set for the infrared signal, causing the infrared light to carry directional polarization properties during emission, thereby changing the energy distribution of the reflected wave when incident on a high-reflection surface. In this way, the concentration of reflected energy after the infrared signal comes into contact with the mirror area is controlled, avoiding the formation of strong echo paths.

[0070] During polarization angle control, antireflective coatings are applied to high-reflection areas to physically reduce the optical reflectivity of the reflective surface. The treatment area of ​​the antireflective coating is selected based on the distribution range of high-reflection areas determined in the multipath reflection suppression scheme, focusing on areas with high specular reflectivity. The coating material is a transparent medium with a specific refractive index, which attenuates the intensity of reflected light by changing the refractive difference at the interface between the incident light and the reflective surface. During the coating process, the transmission characteristics of the infrared band are considered, so that the reflected energy of the infrared signal is weakened while the transmitted portion is enhanced when passing through the antireflective surface, thereby reducing the energy of the echo signal. The coating thickness is controlled in layers according to the optical characteristics of the reflective surface, keeping the surface reflectivity changes in different areas in a continuous transition state to prevent local energy abrupt changes. Through this coating treatment, the energy reflection distribution of the infrared signal in the propagation path is more balanced, which, combined with polarization angle control, forms a dual reflection suppression at the optical level.

[0071] After completing polarization angle control and anti-reflection coating treatment, the polarization-corrected infrared signal distribution is reorganized to generate a new reflection signal distribution. In this stage, the intensity data of the infrared reflection signal after polarization and anti-reflection processing is reacquired, and a new energy distribution map is formed based on its spatial distribution location and energy density. This map is based on the original reflection distribution map, but its energy gradient is redistributed in the high-reflection region. High-energy points originally concentrated in the mirror area are weakened and diffused to the surrounding area, resulting in a smooth transition in the overall energy density field. Simultaneously, the introduction of the polarization angle causes intensity attenuation of the reflected light in a specific direction, thereby reducing the original multipath echo superposition phenomenon. This distribution result allows for a visual observation of the spatial variation trend of the polarization-corrected reflected energy, providing fundamental data for subsequent sensitivity adjustment of sensor control and valve response setting.

[0072] The polarization-corrected reflection signal distribution is written back to the reflection distribution map to generate an updated echo region map. This step, based on the correction results from the previous stage, updates the energy layering structure of the original reflection distribution map, reflecting the energy changes after polarization angle control and anti-reflection coating treatment into the overall reflection model. By comparing the distribution maps before and after the update, regions with reduced reflection intensity and regions with balanced energy can be clearly identified. During the update process, the original high-energy reflection areas are relabeled as low-interference areas, and the energy distribution change trend is recorded as a dynamic parameter, providing a basis for subsequent sensitivity adjustment and valve action sequence setting. The generated echo region map not only reflects the directional characteristics of infrared signal propagation in space but also retains the corresponding parameters of polarization angle and anti-reflection coating, enabling the sensor control to achieve synergy between optics and control logic in the subsequent dynamic optimization stage. This updated echo region map serves as a new round of reflection environment reference, providing a stable optical response model for the automatic sensor faucet control process, making the propagation path of infrared signals in complex environments more controllable.

[0073] Based on the updated echo region map, the infrared sensor sensitivity, delay response time and water outlet trigger threshold are reconfigured to generate a valve action sequence table, so that the action timing in the valve action sequence table matches the signal response rhythm corresponding to the updated echo region map.

[0074] To ensure consistency in the response rhythm of infrared sensing and water flow control, and to establish matching action logic guided by the updated echo region map, the infrared sensor sensitivity, delay response time, and outlet trigger threshold are reconfigured to generate a valve action sequence table. This ensures that the timing of actions in the valve action sequence table is coordinated with the spatial variation of the infrared signal. The specific implementation steps are as follows:

[0075] After generating the updated echo region map, the infrared signal energy distribution and time response characteristics of each sensing region in the map are analyzed to establish the basic data for sensitivity reconfiguration. This stage identifies the signal energy density variation trend at different locations in the echo region map, mapping the infrared signal intensity and time response relationship of each sensing region, enabling the system to adjust the sensing sensitivity according to the reflection characteristics of different regions. During the infrared sensing sensitivity reconfiguration process, using the energy distribution of high-reflection areas as a reference, the response threshold of the optical receiving unit is adjusted to ensure that the sensing area's response capability to reflected signals is consistent with the light energy distribution. This reduces the trigger threshold sensitivity in areas with high reflected energy, maintains moderate sensitivity in areas with uniform energy distribution, and increases the receiving response capability in areas with relatively weak reflected energy. This ensures that the infrared received signal maintains a relatively stable trigger state under different reflection environments, thereby achieving matching between sensing sensitivity and spatial optical characteristics. This sensitivity adjustment establishes a hierarchical response relationship for the infrared signal during spatial propagation, providing a reliable triggering basis for subsequent action delay settings.

[0076] After completing the sensitivity configuration, the delay response time is reset to establish a timing coordination between the infrared signal triggering and the valve response. The delay response time setting is based on the updated echo region map. By analyzing the signal return time and reflection stability of each reflection region, the delay triggering characteristics of different regions are determined. For regions with short signal propagation paths and stable reflections, the delay response time is kept short to quickly trigger water flow after a target enters the sensing zone. For regions with longer signal paths or weak reflections, the delay response time is appropriately extended to avoid false triggering caused by instantaneous reflection signals. The delay response time reconfiguration process is interrelated with the sensitivity configuration. By coordinating the parameter settings of both, the infrared sensing device can accurately identify the entry and exit of target objects under different reflection conditions. Through reasonable adjustment of the delay response time, the valve opening and closing rhythm can be synchronized with the dynamic changes of the reflected signal, thereby avoiding frequent start-stop phenomena during water discharge and improving the stability of the entire sensing control.

[0077] After reconfiguring the sensitivity and delay response time, the water outlet trigger threshold is set to match the water outlet signal triggering conditions with the optical response characteristics. The water outlet trigger threshold is the criterion for controlling valve action after the sensed signal reaches a specific intensity; this threshold value is set based on the sensitivity and delay configuration. To ensure that the water outlet triggering conditions are consistent with the distribution of spatial reflected energy, the updated echo region map is used as a spatial reference model during the setting process. Weights are allocated to the signal response intensity in different regions, allowing the trigger threshold to dynamically adjust with changes in reflected energy distribution. For high-reflection regions, due to the higher signal intensity, the water outlet trigger threshold is appropriately increased to prevent false triggering, ensuring that the valve action is only triggered when the target object is stably stationary in the sensing area. For low-reflection regions, to ensure sensitive response, the trigger threshold is set to a lower value, allowing the system to reliably respond to target actions even when light energy is weak. In this way, the water outlet trigger threshold and the spatial energy gradient of the infrared signal are matched, ensuring that the sensing triggering conditions maintain stable response characteristics under different environments, avoiding false actions and response delays.

[0078] After reconfiguring the infrared sensor sensitivity, delay response time, and water outlet trigger threshold, a valve action sequence table is generated based on these parameters. This ensures that the timing of actions in the valve action sequence table corresponds to the signal response rhythm in the updated echo region diagram. This stage integrates the temporal logic of sensitivity, delay, and trigger threshold, mapping the trigger sequence of each sensing region to the propagation path of the infrared signal, thus giving the valve actions spatial sequence and temporal coherence. In the valve action sequence table, opening time, closing time, and water outlet duration are set for different sensing regions, ensuring that the valve response rhythm perfectly matches the dynamic changes of the sensing signal. This timing arrangement allows the opening and closing actions of the water flow to accurately correspond to the entry and exit of target objects, preventing accidental water outlets or delayed water cut-offs caused by signal fluctuations. Simultaneously, the valve action sequence table also records the correspondence between energy consumption and water outlet duration, enabling the system to dynamically adjust based on energy distribution and response timing during subsequent operation. The generated valve action sequence table not only realizes the synchronous control of infrared signal response and valve action, but also enables the automatic sensor faucet to have a stable water output control rhythm in complex reflective environments.

[0079] Based on the valve action sequence table, the system continuously performs infrared emission angle cruise adjustment, polarization angle alternation switching, and sensor sensitivity fine adjustment. The adjustment results are used to dynamically correct the reflection distribution map and output a stable water output time series and energy consumption record results, thereby achieving stable control of the automatic sensor faucet in a high-reflection environment.

[0080] To achieve long-term stable control of infrared signals in complex reflection environments, maintain a dynamic balance between the infrared emission angle, polarization angle direction, and sensing sensitivity, and ensure coordination between water flow rhythm and energy consumption response, a dynamic adjustment mechanism based on the valve action sequence table is employed. This mechanism continuously performs infrared emission angle cruise adjustment, polarization angle alternating switching, and fine-tuning of sensing sensitivity, thus forming a real-time optical and motion feedback loop throughout the entire sensing control process. This stage achieves dynamic mapping between the infrared signal propagation path and the reflection distribution map through continuous parameter fine-tuning and distribution correction, keeping the water flow time series stable and accompanied by synchronous output of energy consumption data, thereby maintaining the stability of faucet control in high-reflection environments. The specific implementation steps are as follows:

[0081] Based on the time sequence of valve action sequence, the infrared emission angle is adjusted by cruise control to ensure uniform spatial coverage of the infrared emission direction and correspondence with the updated echo area map. This stage uses the timing of each action recorded in the valve action sequence as a reference, comparing and analyzing the infrared sensing state and infrared signal propagation path corresponding to each water discharge action to identify the energy distribution trend of the infrared signal in different time periods. Based on these trends, the angle of the infrared emitter is gradually adjusted to cruise around the reference emission direction by a small angle within a specific time period. Through continuous angle cruise control, the infrared light can form a continuous scanning coverage within the sensing area, enabling the system to obtain dynamic feedback of reflected signals under different incident directions. The cruise adjustment process is synchronized with the valve action rhythm. When the valve is in the opening phase, the scanning range of the infrared emission angle is relatively concentrated to ensure the detection accuracy of the water flow trigger area; when the valve is in the closing phase, the scanning range of the infrared emission angle is appropriately expanded to obtain reflection change data of the surrounding environment. Through this coordinated control of time and angle, the directional distribution of the infrared emission path dynamically corresponds to the reflection environment, providing continuous optical input for subsequent polarization control and sensitivity refinement.

[0082] Based on the cruise adjustment of the infrared emission angle, alternating polarization angle switching is performed to form an alternating polarization distribution of light waves in space, further reducing the echo superposition effect in high-reflection areas. The implementation of alternating polarization angle switching is rhythmic with the cycle of cruise angle changes. By alternating the polarization direction of infrared light during continuous angle changes, the infrared waves received at different times along the same spatial path have different polarization characteristics, thus dispersing the directional concentration of reflected light at the optical level. In high-reflection areas, the alternating polarization direction switching can attenuate some polarization components of reflected light, thereby weakening the originally concentrated reflection energy peak. The alternating polarization angle switching acts not only on the emission direction but also on the receiving direction. Through polarization recognition at the infrared receiver, the system can distinguish signal components under different polarization states, thereby further optimizing the accuracy of signal recognition. The continuous execution of this alternating switching creates a dual distribution characteristic of temporal and polarization separation in the infrared signal in space, effectively suppressing multipath interference caused by specular reflection during the sensing stage. The optical feedback results after the alternating polarization angle switching are recorded in real time, providing a basis for subsequent sensitivity refinement based on light energy distribution.

[0083] Based on the alternating polarization angle switching, the sensitivity of the sensing unit is refined to further improve its response accuracy to infrared signals and maintain match with real-time optical feedback. This refined sensitivity adjustment uses the polarization-controlled infrared signal feedback as a reference, analyzing the rate of change of signal intensity in different directions within the sensing area to adjust the sensitivity in layers. Specifically, in directions where the infrared signal energy is stable, the baseline sensitivity response is maintained to ensure the continuity of valve operation; in directions with strong signal fluctuations, the sensitivity response threshold is appropriately reduced to prevent false triggering caused by transient signal interference; and in signal attenuation regions, the sensitivity response is increased so that the system can still detect the weak reflected signals of the target. This refined sensitivity adjustment is combined with the timing in the valve operation sequence table to ensure that the sensitivity state corresponding to each valve operation cycle matches the real-time reflected signal distribution. Through this dynamic sensitivity control method, the infrared sensor maintains stable recognition accuracy at different times and angles, ensuring the continuity and stability of water discharge triggering. This sensitivity refinement process is also correlated with energy distribution data, enabling the system to automatically balance the relationship between sensing sensitivity and energy consumption during operation.

[0084] After completing the infrared emission angle cruise adjustment, polarization angle alternation switching, and sensor sensitivity refinement, the reflection distribution map is dynamically corrected using the above adjustment results, and a stable water output time series and energy consumption record are output. The dynamic correction process uses real-time acquired optical feedback and action data as input, synchronously writing the energy distribution changes, polarization direction distribution, and sensitivity response adjustment results of the infrared signal within the cruise cycle into the reflection distribution map. The corrected reflection distribution map updates the energy gradient relationship of each reflection region in space, ensuring a continuous correspondence between the infrared signal propagation path and the reflection response mode in the time dimension. The updated distribution map is used in the sensing control of the next cycle, thereby achieving an immediate response to environmental changes. After dynamic correction, the system outputs a stable water output time series according to the valve action sequence table. This time series reflects the duration and rhythm of water flow opening and closing, ensuring consistency between water flow action and infrared sensing feedback. Simultaneously, during each water output process, the corresponding energy consumption data is recorded, forming an energy consumption record. This record is used for subsequent energy optimization and water-saving strategy adjustments in the control process. By synchronizing the energy consumption record with the water output time series, the infrared sensing control process forms a coordinated feedback loop among optics, motion, and energy, thereby ensuring long-term stable control of the automatic sensor faucet in a high-reflection environment.

[0085] This invention constructs a dynamic sensing control mechanism based on a reflection distribution map, continuously correcting the propagation path of infrared signals under different reflection environments, effectively reducing multipath echo interference caused by highly reflective materials. By synchronously adjusting the infrared emission angle and the receiving window, the directional distribution of the infrared signal maintains a real-time correspondence with the spatial reflection characteristics, thereby avoiding false triggering and delayed triggering problems, ensuring the continuity and accuracy of sensing judgment, and enabling the faucet to maintain a stable water flow response even in complex lighting and reflective environments.

[0086] This invention weakens optical interference in high-reflection areas through polarization angle control and anti-reflection coating. Combined with adaptive configuration of sensitivity, delay response, and water outlet trigger threshold, it ensures coordinated valve action and signal feedback. During operation, the system automatically adjusts control parameters based on echo changes, achieving a smooth transition between water flow opening and closing, reducing energy consumption fluctuations and solenoid valve load, and improving the water-saving performance and reliability of automatic sensor faucets over long-term operation.

[0087] This invention provides, for example Figure 2 An automatic sensor faucet, as shown, includes a reflection distribution map generation module, a multipath reflection suppression module, a polarization and anti-reflection optimization module, a sensitivity and valve configuration module, and an adaptive optimization execution module.

[0088] The reflection distribution map generation module collects infrared reflection signals, ambient brightness, and reflectivity of decorative surfaces during the automatic sensor faucet control process. Based on the collected data, it generates a reflection distribution map, determines the concentrated area of ​​mirror reflection based on the reflection distribution map, and forms an initial sensing angle scheme.

[0089] The multipath reflection suppression module adjusts the infrared emission range and infrared receiving window synchronously according to the initial sensing angle scheme, and performs alternating deflection actions according to the set rhythm to generate a multipath reflection suppression scheme, thereby correcting the correspondence between the infrared signal direction distribution and the reflection distribution map.

[0090] The polarization and anti-reflection optimization module, based on the multipath reflection suppression scheme, superimposes polarization angle control and applies anti-reflection coating treatment to the high reflection area to form a polarization-corrected reflection signal distribution result. This distribution result is then written back to the reflection distribution map to generate an updated echo region map.

[0091] The sensitivity and valve configuration module reconfigures the infrared sensing sensitivity, delay response time and water outlet trigger threshold according to the updated echo area map, and generates a valve action sequence table so that the action timing in the valve action sequence table matches the signal response rhythm corresponding to the updated echo area map.

[0092] The adaptive optimization execution module, based on the valve action sequence table, continuously performs infrared emission angle cruise adjustment, polarization angle alternating switching, and sensor sensitivity fine adjustment. It uses the adjustment results to dynamically correct the reflection distribution map and output a stable water output time series and energy consumption record results, thereby achieving stable control of the automatic sensor faucet in a high-reflection environment.

[0093] The present invention provides an automatic sensor faucet control method, which is implemented by the above-mentioned automatic sensor faucet. For details of the specific method and process of the automatic sensor faucet control method, please refer to the above-mentioned embodiment of the automatic sensor faucet control method, which will not be repeated here.

[0094] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An automatic sensor faucet control method, characterized in that, Includes the following steps: During the automatic sensor faucet control process, infrared reflection signals, ambient brightness, and reflectivity of decorative surfaces are collected. A reflection distribution map is generated based on the collected data. The concentrated area of ​​mirror reflection is determined based on the reflection distribution map, and an initial sensing angle scheme is formed. Based on the initial sensing angle scheme, the infrared emission range and infrared receiving window are synchronously adjusted, and alternating deflection actions are executed according to the set rhythm to generate a multipath reflection suppression scheme, so that the correspondence between the infrared signal direction distribution and the reflection distribution map is corrected. Based on the multipath reflection suppression scheme, polarization angle control is superimposed and anti-reflection coating is applied to the high reflection area to form a polarization-corrected reflection signal distribution result. This distribution result is then written back to the reflection distribution map to generate an updated echo region map. Based on the updated echo region map, the infrared sensor sensitivity, delay response time and water outlet trigger threshold are reconfigured to generate a valve action sequence table, so that the action timing in the valve action sequence table matches the signal response rhythm corresponding to the updated echo region map. Based on the valve action sequence table, the system continuously performs infrared emission angle cruise adjustment, polarization angle alternation switching, and sensor sensitivity fine adjustment. The adjustment results are used to dynamically correct the reflection distribution map and output a stable water output time series and energy consumption record results.

2. The automatic sensor faucet control method according to claim 1, characterized in that, The initial sensing angle scheme is formed as follows: For the installation environment of automatic sensor faucets, infrared reflection signals, ambient brightness and reflectivity of decorative surfaces are collected, and the infrared signal intensity, ambient brightness value and reflectivity value are recorded in a fixed coordinate system to generate three-dimensional spatial reflection data for optical modeling. Based on the spatial correspondence between infrared reflection signals, ambient brightness, and reflectivity of decorative surfaces, a normalized mapping is performed and a light energy density field is superimposed to construct a reflection distribution map to express the spatial relationship between the infrared emission direction and the reflected echo. Based on the reflection distribution map, identify areas with concentrated energy density and sustained echo intensity, and combine the ambient brightness distribution and the trend of reflectivity variation of the decorative surface to determine the concentrated areas of specular reflection. Based on the spatial distribution of the concentrated area of ​​specular reflection, an initial sensing angle scheme is formed, the optimal angle combination of infrared emission direction and infrared reception direction is determined, and the effective detection boundary of the sensing area is defined.

3. The automatic sensor faucet control method according to claim 2, characterized in that, The steps for generating a multipath reflection suppression scheme are as follows: Based on the initial sensing angle scheme, an angle mapping relationship between the infrared emission direction and the reflection distribution map is established, and the angle segment overlapping with the high reflection area in the infrared emission range is determined according to the energy density distribution information. Based on the angle mapping relationship, the infrared emission range and the infrared receiving window are synchronously adjusted to make the emission direction and the receiving direction form a spatial intersection area and maintain continuous coverage. The infrared signal is distributed alternately in time and direction in space according to a preset angle and rhythm to reduce multipath overlap. The infrared emission and reception directions are corrected for directional distribution. Based on the energy gradient of the reflection distribution map, the optimal directional combination is determined, and a multipath reflection suppression scheme is generated.

4. The automatic sensor faucet control method according to claim 3, characterized in that, The alternating deflection action is executed with the initial sensing angle scheme as the reference starting point. When the infrared emission direction deflects within the set angle range, the infrared receiving direction is adjusted in the opposite direction according to the same deflection amplitude, so that the infrared signal forms a continuous coverage sequence in the spatial path.

5. The automatic sensor faucet control method according to claim 3, characterized in that, The updated echo region map generation steps are as follows: Based on the multipath reflection suppression scheme, the relationship between the propagation direction of the infrared signal and the reflection angle is analyzed, and the polarization angle control parameters are determined according to the reflection characteristics of different material surfaces, so that the infrared signal changes the energy distribution of the reflected wave when incident on a highly reflective surface. While implementing polarization angle control, an anti-reflection coating is applied to the high-reflection area to reduce the intensity of reflected light and maintain continuous energy transition by changing the refractive difference at the interface between the incident light and the reflecting surface. The polarization-corrected infrared signal distribution is reconstructed, and a new reflected signal distribution result is generated based on the spatial distribution location and energy density. The polarization-corrected reflected signal distribution results are written back to the reflection distribution map, the energy layer structure is updated, and an updated echo region map is generated.

6. The automatic sensor faucet control method according to claim 5, characterized in that, The polarization angle is synchronously adjusted according to the spatial combination of the infrared emission direction and the receiving direction, so that the infrared signal forms a directional polarization distribution under different incident angle conditions. The intensity ratio of the parallel component and the perpendicular component in the reflected light is changed by alternating the polarization angle.

7. The automatic sensor faucet control method according to claim 5, characterized in that, The steps for generating the valve action sequence table are as follows: After generating the updated echo region map, the infrared sensing sensitivity is reconfigured according to the infrared signal energy distribution and time response characteristics of each sensing region, so that the response capability of the sensing region is consistent with the light energy distribution state. After completing the infrared sensor sensitivity configuration, the delay response time is reset based on the signal return time and reflection stability of the updated echo region map to ensure that the infrared signal triggering and valve response are coordinated in timing. After configuring the delay response time, set the water discharge trigger threshold based on the sensitivity and delay results to match the triggering conditions with the spatial reflection energy distribution. Based on the reconfigured infrared sensing sensitivity, delay response time, and outlet trigger threshold, a valve action sequence table is generated to ensure that the action timing is consistent with the signal response rhythm corresponding to the updated echo area map.

8. The automatic sensor faucet control method according to claim 7, characterized in that, During the reconfiguration of infrared sensing sensitivity and the setting of delay response time, the energy density gradient in the updated echo region map is used as a parameter. The optical receiving threshold and response time are adjusted by partitioning to make the infrared signal triggering conditions form a continuous distribution in different reflection regions.

9. The automatic sensor faucet control method according to claim 7, characterized in that, Based on the valve action sequence table, the following steps are performed: infrared emission angle cruise adjustment, polarization angle alternation switching, and sensor sensitivity refinement adjustment. The reflection distribution map is dynamically corrected using the adjustment results, and the output water effluent time series and energy consumption record results are generated: The infrared emission angle is adjusted by cruise control according to the time sequence of the valve action sequence table, so that the infrared emission direction forms continuous coverage in space and corresponds to the updated echo area map. After completing the cruise adjustment of the infrared emission angle, the polarization angle is switched alternately to make the infrared light form an alternating polarization distribution in space to weaken the echo superposition effect. Based on the alternating switching of polarization angles, the sensing sensitivity is finely adjusted to keep the sensing sensitivity matched with the real-time optical feedback and balance the energy distribution; The reflection distribution map is dynamically corrected based on the results of infrared emission angle cruise adjustment, polarization angle alternation switching and sensor sensitivity refinement adjustment, and a stable water output time series and energy consumption record results are output.

10. An automatic sensor faucet, used to implement the automatic sensor faucet control method according to any one of claims 1-9, characterized in that, It includes a reflection distribution map generation module, a multipath reflection suppression module, a polarization and anti-reflection optimization module, a sensitivity and valve configuration module, and an adaptive optimization execution module. The reflection distribution map generation module collects infrared reflection signals, ambient brightness, and reflectivity of decorative surfaces during the automatic sensor faucet control process. Based on the collected data, it generates a reflection distribution map, determines the concentrated area of ​​mirror reflection based on the reflection distribution map, and forms an initial sensing angle scheme. The multipath reflection suppression module adjusts the infrared emission range and infrared receiving window synchronously according to the initial sensing angle scheme, and performs alternating deflection actions according to the set rhythm to generate a multipath reflection suppression scheme, thereby correcting the correspondence between the infrared signal direction distribution and the reflection distribution map. The polarization and anti-reflection optimization module, based on the multipath reflection suppression scheme, superimposes polarization angle control and applies anti-reflection coating treatment to the high reflection area to form a polarization-corrected reflection signal distribution result. This distribution result is then written back to the reflection distribution map to generate an updated echo region map. The sensitivity and valve configuration module reconfigures the infrared sensing sensitivity, delay response time and water outlet trigger threshold according to the updated echo area map, and generates a valve action sequence table so that the action timing in the valve action sequence table matches the signal response rhythm corresponding to the updated echo area map. The adaptive optimization execution module, based on the valve action sequence table, continuously performs infrared emission angle cruise adjustment, polarization angle alternation switching, and sensor sensitivity fine adjustment. It uses the adjustment results to dynamically correct the reflection distribution map and output stable water output time series and energy consumption record results.

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