Electric Motor Application in Under Vehicle Surveillance System (UVSS)

1. Component Composition

The Under Vehicle Surveillance System (UVSS) is primarily used for real-time imaging and threat detection of vehicle undercarriages. It is widely applied in high-security locations such as customs, military bases, government buildings, and critical factories. The system typically consists of the following core components:

• Vehicle Guidance System: Guides vehicles through the inspection area at a reasonable speed, assisted by speed limit signs and lane guidance devices.
• Undercarriage Imaging System: Includes high-definition industrial cameras, line-array scanning modules, supplementary lighting, and image synthesis systems.
• Embedded Tracks/Lifting Platforms: Equipped with motor control modules to drive the scanning device’s vertical, lateral, and rotational movements.
• Image Analysis and Recognition System: Uses image stitching and AI recognition techniques to detect modifications, mounted foreign objects, etc.
• Communication and Control System: Connects the front-end recognition terminals with the backend security platform for unified control and alarm triggering.
• Protection and Structural Support: Ensures the equipment’s resistance to pressure, corrosion, and adapts to all-weather outdoor operating environments.

2. Working Principle

When a vehicle enters the inspection area, the guidance system controls its speed and ensures it is centered. At this point, the line-array camera system or scanning device located on the ground is driven by motors to perform precise vertical, lateral, or automatic obstacle avoidance movements. The lighting system is also activated to ensure image clarity. The motor control module must respond quickly to ensure precise movement of the camera or imaging system, preventing blurry images or missed scans. The acquired images are processed by an image processing system and stitched together to form a complete image of the undercarriage. These images are uploaded to the security terminal for analysis. If non-original parts or suspicious devices are detected, an alarm is triggered for manual review by security personnel.

3. Role of Motors in the System

The motor's performance requirements are high in the Under Vehicle Surveillance System, with key roles including:

• Platform Lifting and Positioning Control: Stepper or servo motors precisely drive the camera platform for height adjustment, accommodating different vehicle undercarriage heights (millimeter-level precision).
• Lateral Movement and Scanning Synchronization: High-torque motors drive the scanning module’s lateral movement, ensuring full coverage of the undercarriage without any blind spots.
• Automatic Reset and Obstacle Avoidance: The system incorporates encoder motors for automatic reset, path memory, and obstacle detection, enhancing the system's intelligence.
• All-Weather Adaptation: The motors must be waterproof, dustproof, and oil-resistant, typically requiring an IP67 protection level, and must also withstand high temperatures and corrosion.
• High-Frequency Start/Stop and Reliability: With frequent vehicle entries at the security checkpoint, the motors must support high-frequency starts and stops, with an average mean time between failures (MTBF) of over 30,000 hours.
• Vibration and Shock Resistance: Motors positioned at the bottom must withstand significant impact loads, with reinforced structures and shock-resistant bearings.

4. Customized Motor Solutions

To meet the various requirements of UVSS for outdoor use, high-frequency start/stop, and intelligent motion control, we recommend the GPG-IM42 integrated servo stepper motor solution. This motor series integrates high-resolution magnetic encoders, providing precise displacement control with ±0.05mm accuracy. It enables precise coordination of multi-axis movements, such as lifting, translation, and positioning of the undercarriage imaging platform. To handle the complex conditions of dust, water, and oil beneath vehicles, the motor adopts an IP67 fully sealed structure and includes corrosion-resistant fluororubber seals at the shaft seal area to ensure continuous operation in rain, snow, mud, and oil-contaminated environments.

For the lateral movement and image stitching system, the solution uses the GPG-SD60 DC brushless geared motor, offering high torque output and low noise operation. It supports the CANopen bus protocol, facilitating integration with the main PLC control system. Paired with high-precision ball screw or rack and pinion drive systems, the motor ensures stable movement of the camera platform for seamless image coverage. Given the system’s high start frequency, we equip it with long-life imported bearings and temperature-controlled air-cooling structures, ensuring stable performance during 24-hour, high-intensity operations. This solution has been successfully deployed in border inspection stations, nuclear power plants, and military security systems, validating its superior environmental adaptability and system integration capabilities.