System Description

The CLD01 Mobile Photometric Measurement Equipment for AGL integrates multiple advanced technologies, including dynamic light intensity measurement, 3D computer vision measurement, and linear-array scanning with positioning and deviation correction technologies. It enables real-time online monitoring of the light intensity of airfield lighting equipment in full compliance with ICAOAnnex 14 standards. This enhances the efficiency and accuracy of inspections, ensures the reliable operation of the lighting system, and meets the operational requirements of arriving and departing flights.The system imposes no specific requirements on the towing vehicle, is easy to operate, and performs reliably—making it one of the essential intelligent monitoring devices for airport airfield lighting systems.

Main Technical Parameters

Components of the Mobile Photometric System for Airfield Lighting Equipment

Main Features of the System

The system uses a full-range differential PIN-PD illuminance transmitter with fast response to accurately measure illuminance values that match human visual perception, as per the CIE curve, after V(λ) correction. It incorporates a 16-channel self-calibrating programmable gain signal conditioning circuit and a variable-range 16-bit high-speed, high-precision A/D conversion circuit, enabling continuous automatic data acquisition. This ensures the system's adaptability to different airfield lighting intensity measurements while maintaining long-term stable and highly accurate measurements.

Linear Array CCD Scanning Airfield Light Positioning Technology

The system utilizes a high-resolution, high-speed linear array CCD (2K resolution, 18kHz scanning speed) and a photoelectric incremental encoder with a resolution of 1024 pulses per revolution for distance measurement. It quickly detects the moment the inspection vehicle passes over the airfield lighting and the lateral offset distance. This method eliminates the measurement errors caused by discrete sampling and phase lag associated with conventional 11-channel photoelectric detection. It reliably corrects the accumulated measurement errors and lateral displacement of the distance measuring device, thereby improving the uncertainty parameters of the airfield light intensity measurement.

Vehicle Guidance System Based on Centimeter-Level Satellite Positioning Technology

This system is equipped with a satellite navigation-assisted driving system, capable of receiving satellite signals from BDS, GPS, GLONASS, etc. Once the vehicle is started, it displays the positioning coordinates in real-time to the driver, automatically providing centimeter-level precision positioning. The system automatically identifies the measured runway number and the initial airfield light fixture number, and can preset the vehicle's driving trajectory. If the vehicle deviates from the target airfield light, a deviation alert is triggered, displaying the deviation distance and indicating the direction to turn the steering wheel, guiding the driver to align with the measured light fixture. The display screen maintains visibility under strong light backgrounds, allowing the driver to align with the measured light fixture using visual information during photometric testing.

Self-Diagnosis and Automatic Correction Compensation Function with Light History Trend Data Management Technology

The system is equipped with a self-diagnosis function for the sensor and data acquisition system's zero position, ensuring the stability of the sensor and acquisition system. The acquisition system also features a power-on connectivity self-test function, guaranteeing the reliability of the equipment's normal operation. The illuminance measurement system includes cosine correction and testing and correction for stray light (such as skylight and environmental stray light), ensuring the system's adaptability to the environment and consistency of the test data. The system also supports the storage, query, playback, and printing of airfield light history trends, enabling the generation of electronic light intensity test reports. These reports detail the light intensity test results for each fixture, along with summary statistics. They can display the identification and location information of defective fixtures, include manual data entry for retesting or replacing fixtures, and mark the status of fixtures for retesting or replacement.

The light intensity detection software provided with this system is independently developed by our company. All operation interfaces and labels are in Simplified Chinese. The software determines whether the light fixtures meet the required intensity standards based on the latest version of the "Technical Standards for Civil Airport Flight Zones" for light fixtures. When the "Technical Standards for Civil Airport Flight Zones" are updated or new related standards are issued, the embedded criteria for judgment can be updated. Additionally, the software functionality can be adjusted based on the customer's specific usage requirements.