Proximity sensing technology is primarily used for close-range, non-contact sensing control of biological entities. Common proximity sensing technologies include infrared reflection and radar detection, which can be applied in public equipment, electrical switches, bathroom products, and smart home appliances.

    Infrared reflection technology is suitable for close-range detection; however, it requires openings in the product panel, making it susceptible to interference from light and heat. The production process is relatively complex, necessitating the calibration of the emission and reception angles. Additionally, due to the physical attenuation characteristics of the infrared emitting tube, this technology can result in a shorter product lifespan.

    Radar detection technology offers stable mid- to long-range detection capabilities but tends to be more expensive.

Figure 1: Comparison of the Advantages and Disadvantages of Different Proximity Sensing Solutions

    The SinOne proximity sensing solution is based on the SinOne 95FS series MCU, which features an integrated proximity sensing detection circuit. Utilizing capacitive sensing technology, it enables non-contact human sensing control and supports touch button combinations while maintaining a low-power operating mode. This solution can be widely applied in human-machine interaction and body detection applications.

    The product does not require openings, allowing for an integrated chassis design. The traces on the PCB serve as the sensing circuit, resulting in low costs and a long service life. It is unaffected by light interference, resistant to heat influences, and offers high stability.

Figure 2: Principle of SinOne Proximity Sensing Technology

Advantages of the SinOne Proximity Sensing Solution:

Figure 3: SinOne Three-in-One Full-Function Proximity Sensing Solution

    1、MCU + Proximity Sensing + Touch: A three-in-one solution that integrates screen wake-up on touch and touch display, providing a comprehensive HMI (Human-Machine Interface) solution.

    2、No Openings Required: The product features an integrated body design, eliminating the need for any openings.

    3、Stable and Reliable: Utilizes high-grade industrial MCUs that offer exceptional ESD (Electrostatic Discharge), EFT (Electrical Fast Transient), and CS (Conducted Susceptibility) performance.

Application Products:

• Public Hygiene

• Medical Devices

• Smart Home

• Automotive Electronics

  
  

Typical Application:
Wall Switches: 

    Utilize SinOne proximity sensing technology to achieve a screen wake-up function. When a hand or body approaches the switch, the panel backlight automatically illuminates. Once lit, the user can control the switch. This solution reduces power consumption of the switch and enhances convenience for nighttime operations.

Figure 4: Application of Proximity Sensing Technology in Wall Switches

Foot-Activated Toilet:
    Utilizes SinOne proximity sensing technology to enable foot-activated control. When a foot approaches the sensing area of the toilet, the lid automatically opens or the flushing mechanism activates. This solution enhances the user experience by eliminating the need to bend down for operation, promoting convenience and hygiene.

Figure 5: Application of Proximity Sensing Technology in Smart Toilets

Automotive Door Control:
    Utilizes SinOne proximity sensing technology to control car doors. When a hand approaches the hidden door handle, the handle automatically pops out. This solution enhances the convenience of operating the door handle, allowing users to access the door without needing to press or manipulate the handle physically.

Figure 6: Application of Proximity Sensing Technology in Smart Automotive Door Handles

Gesture Control:
    Utilizes SinOne proximity sensing technology to control the on/off functions or settings of smart devices, such as range hoods, elevators, heaters, tissue dispensers, and hand dryers. This solution facilitates operation with wet hands or enables contactless control, significantly enhancing user experience and convenience.

Figure 7: Application of Proximity Sensing Technology in Gesture-Controlled Products