CN-121701694-B - Automatic induction faucet and control method thereof

CN121701694BCN 121701694 BCN121701694 BCN 121701694BCN-121701694-B

Abstract

The invention discloses an automatic induction faucet and a control method thereof, which relate to the technical field of intelligent control of water-saving equipment and comprise the following steps: in the automatic induction faucet control process, infrared reflection signals, ambient brightness and decorative surface reflectivity are collected, a reflection distribution diagram is generated according to collected data, a specular reflection concentration area is determined according to the reflection distribution diagram, and an initial induction angle scheme is formed. According to the invention, the infrared signal propagation path is dynamically controlled through the reflection distribution diagram, the synchronous adjustment of the emission angle and the receiving window is combined, the multipath echo interference is effectively restrained, the optical reflection is weakened through the polarization angle control and the anti-reflection coating, the sensitivity and the trigger threshold are adaptively configured, the valve is stable in action and low in energy consumption, and the accurate sensing and energy-saving control under the high-reflection environment are realized.

Inventors

WANG SHAOQUN
LAN DONGSHENG

Assignees

厦门三昌卫浴科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260212

Claims (10)

1. An automatic induction faucet control method is characterized by comprising the following steps: in the automatic induction faucet control process, collecting infrared reflection signals, ambient brightness and decorative surface reflectivity, generating a reflection distribution diagram according to collected data, determining a specular reflection concentration area according to the reflection distribution diagram, and forming an initial induction angle scheme; According to the initial induction angle scheme, synchronous angle adjustment is carried out on the infrared emission range and the infrared receiving window, alternating deflection action is carried out according to the set rhythm, a multipath reflection inhibition scheme is generated, and the corresponding relation between the infrared signal direction distribution and the reflection distribution map is corrected; According to a multipath reflection inhibition scheme, superposing polarization angle control and applying anti-reflection coating adding treatment on a high reflection area to form a reflection signal distribution result after polarization correction, and writing the distribution result back to a reflection distribution diagram to generate an updated echo area diagram; According to the updated echo region diagram, reconfiguring the infrared sensing sensitivity, the delay response time and the water outlet trigger threshold, and generating a valve action sequence table, so that the action time sequence in the valve action sequence table is matched with the signal response rhythm corresponding to the updated echo region diagram; Based on the valve action sequence table, continuously executing infrared emission angle cruising adjustment, polarization angle alternating switching and induction sensitivity refinement adjustment, dynamically correcting a reflection distribution diagram by using an adjustment result, and outputting a stable water outlet time sequence and an energy consumption recording result.
2. The method of claim 1, wherein the initial sensing angle schedule is formed as follows: Aiming at the installation environment of the automatic induction faucet, collecting infrared reflection signals, environment brightness and reflectivity of a decorative surface, recording infrared signal intensity, environment brightness value and reflectivity value under a fixed coordinate system, and generating three-dimensional space reflection data for optical modeling; carrying out normalized mapping and overlapping light energy density fields according to the spatial correspondence of infrared reflection signals, ambient brightness and reflectivity of the decorative surface, and constructing a reflection distribution diagram to express the spatial relationship of infrared emission directions and reflection echoes; Identifying a region with concentrated energy density and continuous echo intensity according to the reflection distribution diagram, and determining a specular reflection concentrated region by combining the ambient brightness distribution and the change trend of the reflectivity of the decorative surface; According to the spatial distribution of the specular reflection concentrated area, an initial induction angle scheme is formed, an optimal angle combination of the infrared emission direction and the infrared receiving direction is determined, and an effective detection boundary of the induction area is defined.
3. The automatic induction faucet control method according to claim 2, wherein the multipath reflection suppressing scheme generating step is as follows: According to the formed initial induction angle scheme, an angle mapping relation between the infrared emission direction and the reflection distribution diagram is established, and an angle section overlapped with a high reflection area in the infrared emission range is determined according to the energy density distribution information; synchronous angle adjustment is carried out on the infrared emission range and the infrared receiving window according to the angle mapping relation, so that a space crossing area is formed between the emission direction and the receiving direction and continuous coverage is maintained; Performing alternating deflection according to a preset angle rhythm, so that the infrared signals form alternating distribution of time and direction in space to weaken multipath overlapping; And carrying out direction distribution correction on the infrared emission direction and the infrared receiving direction, determining a preferred direction combination according to the energy gradient of the reflection distribution diagram, and generating a multipath reflection inhibition scheme.
4. The automatic sensing faucet control method of claim 3, wherein the alternating deflection is performed with an initial sensing angle scheme as a reference starting point, and when the infrared emission direction deflects within a set angle range, the infrared receiving direction is reversely adjusted according to the same deflection amplitude, so that the infrared signals form a continuous coverage sequence in the space path.
5. The automatic induction faucet control method according to claim 3, wherein the updated echo region map generation step is as follows: On the basis of a multipath reflection inhibition scheme, analyzing the relation between the propagation direction and the reflection angle of an infrared signal, and determining a polarization angle control parameter according to reflection characteristics of surfaces made of different materials so as to change the reflected wave energy distribution when the infrared signal is incident on a high-reflection surface; The high reflection area is subjected to anti-reflection coating treatment while the polarization angle control is implemented, and the intensity of reflected light is weakened and the energy transition continuity is maintained by changing the interfacial refraction difference between incident light and the reflection surface; carrying out data recombination on the infrared signal distribution subjected to polarization correction, and generating a new reflected signal distribution result according to the spatial distribution position and the energy density; and (3) writing the reflection signal distribution result after polarization correction back to the reflection distribution diagram, updating the energy layered structure and generating an updated echo region diagram.
6. The method according to claim 5, wherein 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 directional polarization distribution under different incident angles, and the intensity ratio of the parallel component to the vertical component in the reflected light is changed by alternately switching the polarization angles.
7. The method of claim 5, wherein the step of generating the valve actuation sequence table comprises the steps of: after the updated echo region diagram is generated, 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 capacity and the light energy distribution state of the sensing region are kept consistent; resetting delay response time according to the signal return time length and reflection stability of the updated echo region diagram after completing the infrared induction sensitivity configuration, so that the infrared signal trigger and the valve response form time sequence coordination; After the time delay response time configuration is completed, setting a water outlet trigger threshold according to the sensitivity and the time delay result, and enabling the trigger condition to be matched with the space reflection energy distribution; Generating a valve action sequence table according to the reconfigured infrared sensing sensitivity, the delay response time and the water outlet trigger threshold, so that the action time sequence is consistent with the signal response rhythm corresponding to the updated echo region diagram.
8. The method for controlling an automatic induction faucet according to claim 7, wherein in the process of reconfiguring the infrared induction sensitivity and setting the delay response time, the energy density gradient in the updated echo region map is used as a parameter basis, and the optical receiving threshold and the response time are adjusted by partitioning, so that the infrared signal triggering conditions are continuously distributed in different reflection regions.
9. The automatic induction faucet control method according to claim 7, wherein the steps of performing infrared emission angle cruising adjustment, polarization angle alternating switching and induction sensitivity refinement adjustment based on a valve action sequence table, dynamically correcting a reflection distribution map by using the adjustment result, and outputting a water outlet time sequence and an energy consumption recording result are as follows: Cruising adjustment is carried out on the infrared emission angle 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 region map; after the cruise adjustment of the infrared emission angle is completed, the polarization angle is alternately switched, so that the infrared light forms alternate polarization distribution in space to weaken the echo superposition effect; performing induction sensitivity refinement adjustment on the basis of polarization angle alternate switching, so that the induction sensitivity is kept matched with real-time optical feedback and energy distribution is balanced; And dynamically correcting the reflection distribution diagram according to the results of cruise adjustment of the infrared emission angle, alternate switching of the polarization angle and refinement adjustment of the induction sensitivity, and outputting a stable water outlet time sequence and an energy consumption recording result.
10. An auto-induction faucet for implementing the control method of an auto-induction faucet according to any one of claims 1 to 9, comprising a reflection profile generation module, a multi-path 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 is used for collecting infrared reflection signals, ambient brightness and decorative surface reflectivity in the automatic induction faucet control process, generating a reflection distribution map according to collected data, determining a specular reflection concentration area according to the reflection distribution map and forming an initial induction angle scheme; the multi-path reflection suppression module is used for adjusting the synchronous angle of the infrared emission range and the infrared receiving window according to the initial induction angle scheme, executing alternate deflection actions according to the set rhythm, generating a multi-path reflection suppression scheme, and correcting the corresponding relation between the infrared signal direction distribution and the reflection distribution map; The polarization and anti-reflection optimization module is used for superposing polarization angle control and applying anti-reflection coating adding treatment to a high-reflection area according to a multipath reflection inhibition scheme to form a reflection signal distribution result after polarization correction, and writing the distribution result back to a reflection distribution diagram to generate an updated echo area diagram; The sensitivity and valve configuration module is used for reconfiguring the infrared induction sensitivity, the delay response time and the water outlet trigger threshold according to the updated echo region diagram, and generating a valve action sequence table so that the action time sequence in the valve action sequence table is matched with the signal response rhythm corresponding to the updated echo region diagram; And the self-adaptive optimization execution module is used for continuously executing the cruise adjustment of the infrared emission angle, the alternate switching of the polarization angle and the refinement adjustment of the induction sensitivity based on the valve action sequence table, dynamically correcting the reflection distribution diagram by utilizing the adjustment result and outputting a stable water outlet time sequence and an energy consumption recording result.

Description

Automatic induction faucet and control method thereof Technical Field The invention relates to the technical field of intelligent control of water-saving equipment, in particular to an automatic induction faucet and a control method thereof. Background The automatic sensing faucet control is an intelligent control mode for automatically detecting the approaching or leaving state of a user through a sensing element so as to control the water flow to be opened and closed. The system is characterized in that an infrared, ultrasonic or capacitive sensor is used for monitoring the space change in real time, when the human hand or an object is detected to enter the sensing area, the system controls the electromagnetic valve and the waterway accessory to realize the water flow opening, and when a detected object leaves, the system delays to close the electromagnetic valve through the control circuit to stop water outlet. The control process is generally combined with flow monitoring, temperature detection and water saving logic, and the water outlet time, flow and temperature are accurately controlled through the cooperative adjustment of the valve body and the waterway fittings, so that water supply and water stopping actions are completed under the condition of no contact. The technology is widely applied to intelligent bathroom systems in public toilets, hospitals, laboratories and families, and has the characteristics of automation, energy conservation and sanitation and safety. The prior art has the following defects: In the prior art, an automatic sensing faucet generally determines whether a user enters a sensing area by infrared emission and receiving. However, in practical application, when high-reflection decorative materials such as mirror surfaces, stainless steel, glazed tiles and the like exist near the sensing area, the infrared signals are easily reflected for multiple times, and a space echo overlapping phenomenon is generated. At this time, the receiving end may misjudge the multipath reflected signal as a continuously existing target, so that multiple false triggering points occur in the system. Because reflected light forms superposition interference under different angles and distances, the control unit cannot accurately identify the real induction state, and accordingly the problem that the faucet continuously discharges water or is frequently started and stopped is caused. The interference is particularly obvious in the scenes of strong illumination, deviation of installation angles or more environmental reflection surfaces, and serious consequences such as water resource waste, overheating of an electromagnetic valve, abnormality of a control system and the like are easily caused, so that the interference becomes an unavoidable potential stability hazard in the prior art. The above information disclosed in the background section is only for enhancement of understanding of the background of the disclosure and therefore it may include information that does not form the prior art that is already known to a person of ordinary skill in the art. Disclosure of Invention The invention aims to provide an automatic induction faucet and a control method thereof, which are used for solving the problems in the background technology. In order to achieve the above purpose, the invention provides a control method of an automatic induction faucet, comprising the following steps: in the automatic induction faucet control process, collecting infrared reflection signals, ambient brightness and decorative surface reflectivity, generating a reflection distribution diagram according to collected data, determining a specular reflection concentration area according to the reflection distribution diagram, and forming an initial induction angle scheme; According to the initial induction angle scheme, synchronous angle adjustment is carried out on the infrared emission range and the infrared receiving window, alternating deflection action is carried out according to the set rhythm, a multipath reflection inhibition scheme is generated, and the corresponding relation between the infrared signal direction distribution and the reflection distribution map is corrected; According to a multipath reflection inhibition scheme, superposing polarization angle control and applying anti-reflection coating adding treatment on a high reflection area to form a reflection signal distribution result after polarization correction, and writing the distribution result back to a reflection distribution diagram to generate an updated echo area diagram; According to the updated echo region diagram, reconfiguring the infrared sensing sensitivity, the delay response time and the water outlet trigger threshold, and generating a valve action sequence table, so that the action time sequence in the valve action sequence table is matched with the signal response rhythm corresponding to the updated echo region diagram; based on the valve action seq