Model recommendation: TH-DW1Manufacturer of meteorological and environmental monitoring instruments and equipment, Yunjing Tianhe supports customized services for merchants. Choose Shandong Yunjing Tianhe for equipment, and rest assured. Use of tunnel external brightness detector - monitor the automatic adjustment of tunnel external brightness for the lighting system inside the tunnelThe brightness detector outside the tunnel is the core equipment of the tunnel lighting system. It provides accurate data support for the automatic adjustment of the tunnel lighting system by monitoring the natural light brightness outside the tunnel entrance or exit in real time, ensuring smooth transition of light inside and outside the tunnel, improving driving safety, and achieving energy conservation and consumption reduction. Mainly based on the photoelectric effect for work. When external light shines on the sensor of the detector, the photoelectric components inside the sensor (such as silicon photodiodes or phototransistors) will produce changes in current or voltage, which are proportional to the intensity of the light. By measuring the changes in these currents or voltages, the detector can calculate the brightness value outside the tunnel. Detectors typically use special optical filters to separate the visible light band, avoiding interference from infrared or ultraviolet radiation and ensuring the accuracy of measurement data.

The tunnel brightness monitoring instrument meets the requirements of controlling the entire tunnel lighting. The controller with preset control mode automatically switches the lighting switch according to the preset parameters based on the measured value of the light source, providing value 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 Microprocessor technology, digital operation, installation

Easy debugging.

Technical Specifications:

Measurement range: 0-7500 cd/m2; Can measure 10000cd/m2

Measurement accuracy: 0.1cd/m2

Local data storage exceeds 72 hours

Working temperature: -50 ℃~+70 ℃

Working humidity: 0-100% RH

Average time: ≥ 50000 hours

Protection level: IP68

Power supply: 180-265VAC 50Hz

Digital interface: RS485 data bus