Human Movement Sensor Toilet
Human movement sensors in toilet scenarios can achieve functions such as lights turning on when a person enters and turning off when they leave. However, there are significant performance differences among various types of sensors, and appropriate solutions need to be selected based on specific needs.
Limitations of Infrared Sensors
Infrared sensors trigger lighting control by detecting changes in infrared radiation caused by human movement and are widely used in toilet scenarios. Their core principle is to perceive temperature differences between the human body and the background environment. When a person enters the detection range, the sensor identifies changes in the infrared signal and triggers the lights to turn on. When human movement stops, if the infrared signal intensity falls below a threshold, the sensor may mistakenly judge the area as unoccupied and automatically turn off the lights. For example, when a person sits on the toilet for an extended period without moving, the infrared sensor may turn off the lights due to its inability to continuously detect movement signals, resulting in a poor user experience. Additionally, the detection range of infrared sensors is greatly affected by ambient temperature, potentially leading to misjudgments in high-temperature or low-temperature environments. Moreover, they have weak penetration capabilities for transparent objects (such as glass doors) and are easily interfered with by obstructions.
Advantages of Microwave Radar Sensors
Microwave radar sensors detect the Doppler effect generated by tiny movements such as chest undulations and heartbeats by emitting microwave signals and receiving reflected waves, thereby perceiving the presence of the human body. Their core advantage lies in their ability to maintain the lights on through vital sign signals even when the human body is completely stationary, effectively solving the misjudgment problem of infrared sensors in static scenarios. Furthermore, microwave radar sensors have strong penetration capabilities and can penetrate non-metallic obstacles (such as thin wooden boards and plastic boards). They are also unaffected by ambient temperature and humidity, with significantly better anti-interference capabilities than infrared sensors. In toilet scenarios, microwave radar sensors can more accurately adapt to the needs of prolonged stillness, enhancing the user experience.
Differentiated Applications of Urinal Sensors
Although urinal sensors operate on a different principle from human movement sensors, they also serve the automation needs of toilet scenarios. Based on infrared sensing principles, they control solenoid valves to achieve automatic flushing by detecting human activity signals. When a user approaches the urinal, the sensor identifies changes in the infrared signal and triggers flushing. After the user leaves, the sensor stops detecting signals, and the solenoid valve closes. This technology adopts a non-contact operation mode, effectively avoiding the risk of cross-infection. It also has a simple structure and low cost, making it widely used in public toilet scenarios. However, it should be noted that urinal sensors are only suitable for flushing control and cannot replace lighting control functions. They need to be used in conjunction with other sensors to achieve a complete automation scenario.
