Brightness monitoring instrument outside the tunnel

The brightness monitor outside the tunnel is a key equipment to ensure the safety of tunnel driving. It is based on photoelectric conversion technology and uses high-precision sensors such as silicon photodiodes to capture real-time changes in natural light brightness outside the tunnel entrance. The measurement range is 0-7500 cd/m ², with an accuracy of 0.1 cd/m ² and a response time of less than milliseconds. The device has an IP68 protection level and can adapt to environments ranging from -50 ℃ to+70 ℃. It supports digital interfaces such as RS485 and can achieve remote monitoring and data storage. The lighting can be dynamically adjusted to eliminate the "black hole effect" and "white hole effect".

Brightness monitoring instrument outside the tunnelThe controller with preset control mode can meet the requirements of the entire tunnel lighting control. It automatically switches the lighting switch according to the preset parameters based on the measured value of the light source, providing excellent values for tunnel lighting. Its design complies with CIE's requirements for tunnel lighting measurement and can meet the "Design Specification for Ventilation and Lighting of Highway Tunnels". Moreover, its overall design can meet the requirements of harsh outdoor working environments.

Installation method:

The tunnel light intensity monitor is installed on the walls of the designated area inside the tunnel. In order to avoid damage caused by accidents or car debris, it needs to be installed at a height of about 4 meters and at an appropriate position greater than 10 meters from the tunnel entrance. The tunnel brightness monitoring device is installed at a suitable position outside the tunnel, about 4m from the road surface and 120-200m from the tunnel entrance. Has high reliability and low maintenance Latest microprocessor technology, digital operation, installationEasy debugging.

The tunnel portal brightness monitor is a key device to ensure traffic safety in tunnels. It is based on photoelectric conversion technology and uses high-precision sensors as silicon photodiodes to capture real-time changes in the brightness of natural light outside the tunnel portal. The measuring range reaches 0 to 7500 cdm², with an accuracy of 0.1 cd/m² and a response time below the millisecond level. The equipment has an IP68 protection grade, can to extreme environments from -50℃ to 70℃, supports digital interfaces such as RS485, and can achieve remote monitoring and data storage. It dynamically adjust lighting to eliminate the 'black hole effect' and 'white hole effect'.