On-Site Visualization (OSV), as its name suggests, is a real-time data processing technology used to check safety levels at Construction sites.
A device with built-in LEDs is attached to walls and pillars at the building site and measures any irregularities or tilting. The LEDs light up like traffic lights to indicate the danger level with different colors: blue for "no irregularities," and yellow and red for "danger of collapse." This clear method of representation is important in countries with low literacy rates.

A Monitoring method, called on-site visualization (OSV), has been developed in Japan. It has already been applied successfully at construction sites of slope excava-tion, tunnel excavation, concrete pressure monitoring and bridge construction in Japan. The core concept of the OSV as a new form of engineering monitoring is that the sensors used have a newly added function of emitting measured information as the colour of an LED or another form of light-emitting device. Therefore, as the changes in monitored displacement, strain, inclination, etc. occur, they are processed instantaneously and emitted as the colour of, for example, LED lamps to people nearby.

The speed required for another monitoring system to give an emergency warning signal or message to nearby citizens and construction workers, might be greater than the capa-bility even for a very advanced monitoring system. The monitoring by OSV makes real-time ‘monitoring and disclosure of measured data’ possible.

Read more about implementation of OSV:

OSV in Delhi metro project