How it Works: People Counting Configurations
The Video Turnstile people counting system can monitor many doorways, each doorway being single or double in size. By connecting units together, it can also monitor wider entrances or corridors.
Single or Double Doorway | Two Doorways | Wider Entrances and Corridors | Difficult Counting Situations
Single or Double Doorway
Each single or double doorway requires a single entrance people counting package.
The diagram on the left is of a shop with one entrance. A closed-circuit television camera is mounted flush into the false ceiling, just inside the door. The cable runs through the ceiling void to a Logging Video Turnstile (LVT) unit in a back office or store room. The LVT detects people crossing the threshold, counts them and saves the count. The unit is connected either to a PC or to a modem. With a modem data can be collected by a computer in head ofice when the shop is closed.
Windmill software runs on the PC (either in the back office or at head office) and continuously collects two counts: one of people entering the shop and one of people leaving. Alternatively data can be occasionally downloaded, say once a day. For costs see our price list.
Two Doorways
Here there are two separate entrances to the shop. This means that two cameras and two Video Turnstile people detection units are required. However, only one of these needs to be a logging unit. This is because the Logging Video Turnstile unit can save counts from itself and three other people detectors. This elegant design reduces the cost of the system when more than one doorway is being monitored. For costs of a multi-entrance people counting package see our price list. (Note that if the entrances are over 20 m apart, two logging units may be needed. If in doubt contact us.)
Wider Entrances and Corridors
For entrances that are wider than a double-doorway, several CCTV cameras are mounted in a line across the ceiling with the field of view of each camera overlapping with its neighbours. The Video Turnstile detection unit for each camera communicates with adjacent units and tells them of the existence of people at the edge of its field of view. This means that a person in view of two cameras is counted only once.
Video Turnstile also performs well in difficult counting situations. For example, where large numbers of people transit wide entrances into exhibitions and hospitality areas. For a video example of this situation see our videos page.
Difficult Counting Situations
We have videos from Video Turnstile showing how it copes with several difficult counting situations, namely
- Large numbers of people attending exhibitions.
- People turning sharply as they enter a building, or passing under the video camera without leaving.
- Changing light conditions when counting pedestrians outdoors.
- Crowded shopping conditions.
- Groups of visitors entering or leaving a building at once.
- Different clothing styles and colours, different heights of people and differing speeds of transit.
- Distinguishing between people with with prams, buggies or trolleys, and two people following one another closely.
Request a Quote for a People Counting System
To request quote for a people counting system, or to discuss your application, please fill in our on-line questionnaire.