Automatically measure the illuminance in the tunnel during normal driving

1. Improve efficiency of cleaning/replacement judgment with automatic measurement
2. Measurement by vehicle does not require regulation inside the tunnel
   (Significantly reduces risk of danger)
3. Prevents the illuminance of other vehicles (general vehicles)
4. Achieves high accuracy by measuring horizontal plane illuminance with 3 lines

♦ The illuminance meter light-receiving surface 1/2 is covered with a special hood to eliminate the effects of the vehicle's shadow and headlights.
♦ Highly accurate road surface illuminance measurement is achieved by measuring separately with two-division illuminance sensors in front of and behind the vehicle.

♦ High-precision illuminance measurements possible at high speeds without traffic restrictions
♦ Measurements can be taken in the presence of other vehicles as it is not affected by headlights of other vehicles.
♦ Measures horizontal illuminance along up to three measurement lines in the direction of travel in one run
♦ Identify the lighting status (faults/deterioration) on both sides of the vehicle and the passing vehicle in one run
♦ Measurements can be made regardless of the power frequency of the lighting fixture
♦ Measurement data can be recorded and analyzed at high speed using a PC
♦ Patented

1. Two-division light receiving type illuminance sensor: 4 (2 line specifications) 6 (3 line specifications)
2. Defect detection dedicated sensor: 1 (one side illumination detection) 2 (both sides illumination detection)
3. Dedicated amplifier (data recording section)
4. Measurement software (alarm function when there is no signal, simple data display)
5. Analysis software (illumination graph display of arbitrary section)
6. Form output function (section average illuminance, astigmatism)
7. Laptop is not included