Platform Screen Doors, the so called PSD is a safety system used mainly in subway to separate subway platforms from the railway track. Sliding doors installed on the subway platform interact with train doors, while opening and closing simultaneously. One of the main tasks of such systems is to prevent passengers from falling on the track and guarantee constant and safe passenger flow between platform and train. Consequently, the safeguarding of the threshold area between the PSD and the train is one of the most important factors.

Task

On automated Platform Screen Doors, the aim of using sensors is :

1) Monitor and detect the presence of passengers in threshold area between platform screen doors and train doors.
2) Detect presence of passengers in the critical area and give signal to the operating system when requested.
3) Prevents passengers from falling on the track and ensure fluid passengers flow between PSD and train doors.
4) Detection of correct train positioning towards PSD is possible as well with LZR®-901 distance measurement model.

Solution

Our LZR® platform, which is based on the time-of-flight technology, offers the possibility to perform such a task, the LZR®-RS310.
The LZR®-RS310 has been designed to safeguard threshold area between the PSD and train door railway doors in 3 dimensions.
One single sensor (emission and receiver are integrated in one housing) can be sufficient to safeguard the area up to 10 meter distance.
For correct train positioning and other raw data measurement linked to PSD systems we offer LZR®-U901 part of the LZR®-range.

Customer benefits

• sophisticated and convenient alternative to light barriers or other standard infrared sensors.
• safe and reliable system with reduced maintenance costs and increased availability of the complete PSD system.

• LZR®-RS310