Tunnel external brightness detector: Made of high-strength and corrosion-resistant materials, it can resist interference from vehicle exhaust, vibration, and other factors. [Model recommendation: TH-DW1, IoT integrated device, customized service supported by Yunjing Tianhe] As an important component of tunnel lighting systems, tunnel external brightness detectors work in complex and harsh environments, requiring long-term exposure to vehicle exhaust, mechanical vibration, and drastic changes in temperature and humidity. To ensure stable operation and data accuracy of the equipment, the use of high-strength, corrosion-resistant materials and optimized structural design have become the key technological path to resist interference. Strong corrosion resistance, especially suitable for humid and salt spray environments (such as tunnels in coastal areas); High mechanical strength, capable of withstanding vehicle impacts or rockfall impacts. The brightness detector outside the tunnel has achieved long-term stable operation in harsh environments through the comprehensive application of high-strength corrosion-resistant materials, anti vibration sealing structures, and intelligent anti-interference technology.

Product Overview:

Highway tunnels are special sections of highways, with narrow spatial environments, large variations in lighting, and unclear visibility as a special tubular structure. Unlike the bright and spacious roads outside the tunnel, the process of vehicles entering and passing through the tunnel is a process of entering from the bright into the black hole, and then moving from the black hole to the bright. The process of transitioning from light to dark or from dark to light requires an adaptation process. During this adaptation process, drivers find it difficult to identify road targets or objects inside the tunnel, resulting in visual psychological barriers or obstacles that make driving appear unsafe. The purpose of tunnel lighting is to create a good working visual environment quality inside the tunnel, ensuring that vehicles traveling during the day and night can safely approach, pass through, and pass through the tunnel at the designed speed.

Tunnel light intensity detector is an efficient lighting control system designed to address visual adaptation issues caused by differences in brightness and darkness inside and outside tunnels. In response to the demand for lighting control in domestic highway tunnels, our company has developed a tunnel illumination detector and an external brightness detector to meet market demands. Its overall design is versatile and can meet the requirements of harsh working environments in the wild. It has high reliability and low maintenance, the latest microprocessor technology, fully digital operation, and easy installation and debugging. This product aims to improve the scientific and energy efficiency of tunnel lighting by accurately measuring the brightness of the tunnel entrance and automatically adjusting the internal lighting, ensuring driving safety requirements and energy-saving effects, while complying with the requirements of the "Design Specification for Highway Tunnel Ventilation and Lighting".

Application Scenario:

1. Monitoring and adjustment: The brightness detector outside the tunnel is used in conjunction with the illuminance detector inside the tunnel. The detector outside the tunnel monitors the real-time changes in the intensity of the light outside the tunnel and adjusts the lighting intensity inside the tunnel to ensure a smooth transition of light inside and outside the tunnel, reducing visual impact for drivers entering and exiting the tunnel and improving driving safety.

2. Energy saving optimization: dynamically adjust the lighting power inside the tunnel based on the natural light intensity outside the tunnel, avoiding excessive lighting during the day or insufficient lighting at night, achieving precise allocation of lighting resources, reducing tunnel operating costs, and achieving energy-saving goals.

3. Safety warning: When severe weather conditions are detected causing a sudden drop in brightness outside the tunnel or other abnormal situations, emergency lighting plans can be activated in advance, and variable information boards and other devices can be used to remind drivers to slow down and ensure driving safety.

Product Features:

1. There is a good linear relationship between brightness and photocurrent, and they can respond promptly to changes in light.

2. According to the CIE specified human visual spectrum curve, a specially designed high-efficiency filter is used for calibration, which conforms to the characteristics of human visual perception

3. The device is equipped with heating elements and cooling fans inside, which keep the device at its optimal operating temperature and minimize the impact of temperature factors on accuracy.

4. Equipped with automatic gain control technology to improve accuracy in low light and strong light environments.

5. The device comes with status display, fault alarm, and data storage functions, making it easy to debug and maintain.

6. A large range, comprehensive and durable optical probe.

7. Multiple output methods, convenient data collection.

8. Low power design ensures sustained performance while saving energy

9. Specially designed for the special harsh environmental conditions of tunnels, ensuring long-term stable operation

10. Lightning protection measures have been taken, and the communication interface and power interface have lightning protection design, greatly reducing the damage that may be caused by lightning strikes

Technical Specifications:

Measurement range: 0-10000 cd/m2

Measurement angle: Vertical ≥ 20 º Horizontal ≥ 20 º

Measurement accuracy: ± 0.1 cd/m2

Communication interface:

1 RS485 digital output interface;

1 channel 4-20mA analog output interface;

1-channel relay switch alarm output interface.

Power consumption: rated 5W, maximum 20W (heating)

Load impedance: ≤ 500 Ω

Supply voltage: 90V-305VAC (47-63Hz)

Working temperature: -50 ℃~+85 ℃

Working humidity: 0-100% RH

Protection level: IP68

Working life: ≥ 50000 hours

Installation method: Column installation