Smart restrooms at Guangdong Science Center

Project overview

In 2024 Tongwei supplied the smart-restroom scheme for Guangdong Science Center. The venue is open to the public, with several themed galleries, special-effect cinemas and an outdoor science area. Visitors move between exhibits, cinemas and public areas, and study seasons or holidays can reach tens of thousands of people in a day. Restrooms are not on one floor, so cleaners have to judge across levels which room to visit first. The first phase connects seven restrooms: wireless sensors for occupied or free, a red or green indicator outside the stall, ammonia and hydrogen sulphide for odour, and infrared matrix counters at the entrance that do not film faces. Each restroom has a management host; ceiling presence sensors and input-output modules interlock lighting and similar loads. All seven share one platform, with a venue-specific interface. A later restroom uses the door-lock state for occupancy, senses temperature, humidity, ammonia, hydrogen sulphide and illuminance, and adds a 50-inch entrance guide screen plus water metering. The accessible room has its own presence sensor. Entrance screens, including the one on level 3, show free stalls for the men's and women's rooms, temperature, humidity, ammonia, hydrogen sulfide, footfall and water use before entry. Its host keeps acquiring and interlocking if the platform link drops, and it joins the existing platform.

On site

Main functions delivered

1. Stall guidance: 152 wireless sensors and 159 indicators in phase one, so occupancy is visible outside; the later restroom uses 31 door locks
2. Odour: phase one senses ammonia and hydrogen sulphide in each restroom; the new one adds temperature, humidity and illuminance, and breaches drive cleaning
3. Footfall: infrared matrix counts at the entrance, without filming faces. Twenty-one counters across the first seven restrooms, and one for the new room
4. Interlock: ceiling presence sensors and input-output modules switch lighting and similar loads by occupancy
5. Guidance and water for the new restroom: a 50-inch screen at the door shows free stalls, air and footfall; meters show consumption and abnormal water use
6. One platform for the venue: the first seven restrooms use a custom interface, and the new restroom joins it; its host still works locally if the platform link is down