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PMT Optical Passenger Sensor

PMT’s all-new Optical Passenger Sensor (OPS) is specifically designed for the latest-technology “Low-Floor” transit buses, where a Treadle Switch interface cannot be employed. The Optical Passenger Sensors are the input devices for the PMT Automatic Passenger Counting (APC) System, taking the place of stepwell Treadle Switches used on buses with traditional floors.

Features

  • Input Device for Real Time Passenger Counting System
  • No Moving or Mechanical Parts Virtually Eliminates Maintenance 
  • Single Overhead Sensor per Doorway Offers Easy Installation
  • Image-based System Handles Multiple Passenger Streams
For buses with stepwells, the PMT Automatic Passenger Counting System uses Treadle Switches in the stepwells to determine passenger presence. What about buses without stepwells? The Optical Passenger Sensor (OPS) is the solution. The OPS is a non-contact vision system designed expressly for the vast growing Low-Floor bus industry. As the name implies, the OPS detects passengers optically, and, with no moving parts, it offers superior reliability. 

To develop a sensor technology that equaled the accuracy and quality of the proven Treadle Switch technology, PMT’s highly-skilled and dedicated R&D team explored several other strategies including Active and Passive IR, both from overhead and from side crossing beams. However, these break-the-beam type technologies didn't count crush or simultaneous bi-directional passenger flows with any kind of accuracy at all. Only the OPS can accurately detect crush and simultaneous bi-directional passenger flows.

APC System with Optical Passneger Sensors Diagram
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Updated 08 Feb 2002
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