[Technical Analysis] Unveiling the Second-Level Response Mechanism of Raycada Products from Command to Early Warning

Leikeda staff debugging page

After the engineer outputs the detection command on the console, the radar will enter the " transmit-receive-process-output " completion signal flow process. Each step is technically optimized for offshore environmental characteristics to ensure accurate extraction of target information amid sea wave clutter and electromagnetic interference.

Leikeda staff calibrating radar orientation accuracy

In the midsummer of Wuhan Radar-vision integrated machine At the test site, Leikeda staff will offshore security radar paired with Radar-vision integrated machine After installation, the first step is precise calibration of the radar orientation. This seemingly simple task directly determines the detection accuracy of the entire radar system.

According to testing specifications, the radar's detection power is strongest along the normal direction; detection capability gradually decreases as the elevation/depression angle increases. Therefore, debugging is required to ensure radar coverage of key waters. Then, staff need to input radar orientation 、 monitoring target of distance 、 azimuth 、 latitude and longitude and other basic parameters.

Threshold setting is a key debugging task directly related to the radar's ability to identify targets and resist false alarms. To distinguish real targets from interference signals, the radar system needs to set reasonable detection thresholds. During testing, Leikeda staff set basic thresholds for different types of targets.

Precise confirmation target azimuth 、 speed and navigation path is the core goal for the radar to achieve "effective monitoring."

Leikeda offshore security radar builds a complete target parameter calculation system through directional electronic scanning, Doppler effect dynamic analysis, and continuous multi-dimensional data tracking.

Target azimuth: The radar display, based on monitoring information input by staff, relies on the directional nature of electronic scanning, controls the phase difference of each unit to form a directional beam, and then infers the target azimuth and elevation angle through the correspondence between beam direction and phase difference.

Navigation speed: Based on the Doppler effect, radial velocity is calculated through target echo frequency shift. Meanwhile, space-time adaptive processing filters out false frequency shifts caused by sea wave clutter. Combined with multi-pulse verification to ensure accuracy, the actual navigation speed of the target is finally decomposed.

Navigation path: High-density sampling obtains target azimuth and speed data. AI algorithms predict and correct trajectories, while integrating AIS (Automatic Identification System) data and infrared/optical sensors (excluding birds, clutter, and other false alarms). Ultimately, a continuous trajectory is formed and the future 1-5 minute navigation path is predicted.
 

Radar electromagnetic waves produce reflected echoes when encountering ships, floating objects, and other targets. However, in offshore environments, echoes are often drowned out by sea wave clutter and bird interference. At this time, the "cooperative work" of receiving units becomes critical.

Leikeda offshore security radar Each receiving unit independently captures echo signals. After AI algorithm filters interference, phase calibration circuits correct phase deviations of each unit to ensure "in-phase superposition" of echoes from the same target. This "multi-unit synthetic gain" technology allows the radar to stably output accurate target dynamic information in complex environments, which is its core advantage over traditional radars.

A single radar can detect targets but is limited by lighting conditions, making it difficult to achieve "visual monitoring" in different day and night scenarios.

Therefore, Leikeda innovatively integrates optical sensors to build a multi-dimensional monitoring system of "radar + optical"— radar + optical — Radar-vision integrated machine 。

daytime scenarios : Optical sensors, with high-resolution imaging capabilities, clearly capture details such as ship appearance, hull numbers, and navigation posture, complementing radar-provided azimuth and speed data to accurately identify target types.

Night / low-light scenarios: Infrared sensors use thermal imaging technology, unaffected by light, haze, or sea mist, to clearly capture the engine heat source and hull outline of vessels. Even in pitch-black nights, they can visualize and track target trajectories, completely solving the traditional radar's pain point of "invisibility and unclear details at night."

Addressing offshore fishery disputes, such as fishing boats illegally entering no-fishing zones, aquaculture areas, and unauthorized intrusions, The Leikeda Radar-Visual integrated machine paired with the Leikeda Radar Shield Fishery Protection System, supports a customizable "alert zone" feature to form an active defense mechanism.

Zone demarcation Leikeda staff precisely demarcate No-fishing zone 、 Port control area 、 Aquaculture protection area and other key areas, setting zone boundaries and alert levels.

Real-time comparison: The system compares the target positions captured by radar and electro-optical devices with the defined alert zones in real time. Once an unauthorized target (such as a fishing boat) enters the alert zone, multi-level alarms are immediately triggered.

Alarm response: After the alarm is triggered, the local console issues audible and visual warnings, while pushing real-time target images, navigation trajectories, and alert information to the monitoring center. Staff can observe target details up close through electro-optical/infrared equipment to quickly determine whether to dispatch law enforcement vessels for handling, achieving Detection - Warning - Response closed-loop management.

Behind these test data is a series of advanced technologies working in synergy. The radar's high data refresh rate ensures continuous and stable tracking of fast-moving targets, especially suitable for monitoring high-speed water targets like "large drones" and speedboats. Its flexible range settings (covering  1.2km 、3km、5km、8km and other ranges) enable it to adapt to various application scenarios from nearshore ports to offshore areas.

From traditional radar reception and processing to today's active warning, day-night visibility, and multi-dimensional coordinated intelligent security system, offshore security radar solves the monitoring challenges in complex offshore environments.