From "press once" to "sweep one foot" - Decrypting the intelligent toilet laser foot sensation application
UVLEDTEK Laser Foot Sensing Module Products Help Intelligent Toilets Achieve User Experience Upgrades
A real awkward moment
In the early morning, half asleep and half awake, you entered the bathroom in the dark, kicked the trash can with your foot, and touched the wet buttons with your hand; In public restrooms, you tiptoe to avoid getting dirty, but you have to bend down and flush the water. These scenarios occur 4.7 billion times a day globally (Statista, 2024). 62% of users expressed concern about cross infection, and 38% gave up using the sensing function due to "accidental touch or no response
With the rapid development of technology, smart homes have become inseparable from people's daily lives. The so-called "intelligence" refers to the addition of many "intelligent" functions on the basis of tradition, allowing users to personalize settings according to their usage habits and increase the comfort of use
As one of the core components of smart toilets, the application of sensing technology is crucial. Although traditional physical buttons or remote controls can meet basic usage requirements, they have contact hygiene issues. The application of laser foot sensing technology turns "light" into "buttons", completely freeing hands and making it more hygienic and safe
1、 What is laser foot sensation
The laser continuously scans with 940nm invisible light, forming a "light curtain" of 6mm × 20mm. When the foot is obstructed for ≥ 2 consecutive scanning cycles (≈ 60 ms), it is judged as a valid trigger; The chip synchronously records the slope of the change in occlusion area, achieving the dual instruction of "scan over vs stay". When the detected signal changes conform to the preset foot movement instructions, the chip immediately sends instructions to perform corresponding functions: opening the lid, flipping the circle, flushing, closing the lid, etc
Laser turns on the 'invisible switch
- Transmitting end: 940 nm invisible laser, safety level IEC-60825-1 Class 1, continuous power consumption of only 0.3 W
- Receiver: ToF sensor (Time of Flight), detects optical path difference every 30 ms, with an accuracy of 0.8 mm
- Algorithm layer: The machine learning model distinguishes between "toe scan" (<0.3 s) and "full foot rest" (>1.2 s), with a false triggering rate of<0.5%
2、 Parameters of laser foot sensor
Wuhan UVLEDTEK focuses on innovative research and industrialization of ultraviolet LED technology. As the only enterprise in China that covers the full spectrum of UVA/UVB/UVC and has core technology in the entire industry chain, it continues to empower industrial upgrading with leading technology and is committed to providing efficient and environmentally friendly optical solutions for various industries
| picture | project | parameter |
 |
working voltage | 5V DC |
| rated power | 0. 1-0. 2W | |
| Maximum current | 38mA | |
| Standby current | 5±2mA | |
| protection grade | IP67 | |
| operation temperature | -10~60℃ | |
| Working humidity | ≤95%RH |
3、 Comparison of different sensing technology parameters
Due to the extremely thin laser beam, the sensing area can be precisely defined, greatly reducing the probability of accidental contact. Accurately identifying feet is to "scan" or "stay" in specific areas, thereby achieving different functional distinctions; At the same time, lasers are not affected by environmental temperature, light brightness, heat sources, etc., and their stability is much higher than infrared and other methods
| Induction technology | Induction accuracy | Error rate | Environmental anti-interference capability | response speed | Applicable scenarios |
| Laser foot sensation | millimeter-scale | <0. 5% | Not affected by temperature, light, or heat sources | ≤ 0.3 seconds | Various types of households and public places |
| Infrared induction | Centimeter level | 5-8% | Highly affected by strong light and high-temperature objects | 0.5-1 second | Stable lighting in a home environment |
| Wave induction | Centimeter level | 8-12% | Greatly affected by the amplitude and distance of hand movements | 0.8-1.2 seconds | Scenes with convenient hand operation |
| Physical buttons | not have | 0 | not have | Manual pressing is required, taking 0.5-2 seconds | Scenarios with low hygiene requirements |
At night, all the lights go out. When you step into the bathroom, your toes lightly sweep 8 cm away from the toilet. After 0.22 seconds, the lid quietly rises 75 ° without noise. A soft light automatically lights up at 20% brightness, illuminating a safe area 1.5 meters ahead. Zero contact, zero accidental contact, and zero bending throughout the entire process. From 'press' to' sweep ', the laser foot sensation makes late night toileting as natural as breathing
