The 79GHz Anti-smashing Radar, manufactured by Zhejiang Dahua Vision Technology Co., Ltd., is an advanced device designed for monitoring and controlling vehicles in various access scenarios, particularly in conjunction with boom barriers. It leverages high-precision microwave measurement and high-speed digital signal processing, offering high accuracy, stability, and ease of commissioning.
Function Description:
The primary function of the radar is to prevent boom barrier arms from hitting people or vehicles as they fall. It can also work in conjunction with cameras for license plate recognition, providing reliable data for parking management. The radar transmits detection target information to a host computer or central platform via RS-485 communication or Wi-Fi, allowing real-time data display. It can also trigger cameras for snapshots and assist in controlling barrier opening and closing. The device is capable of distinguishing between people and vehicles, enhancing safety and operational efficiency.
Important Technical Specifications:
- Operating Frequency: 79GHz, utilizing monolithic microwave integrated circuit (MMIC) technology for higher resolution and stable detection.
- Detection Technology: Employs MIMO (multiple-input multiple-output) technology to recognize movement directions of targets, suitable for scenes with both vehicles and people.
- Detection Range: Adjustable detection distance and width. The maximum detection range (Max Range) is generally the length of the barrier arm or lane width, with a value range of 0.3–6.0 meters (3.0 meters by default).
- Minimum Range (Min Range): Adjustable from 0.3–6.0 meters (0.3 meters by default) to filter interference near the radar.
- Left/Right Width: Detection width at the left or right side of the radar normal line, adjustable from 0–1.0 meters (1.0 meter by default).
- Falling Time: Set according to the time the barrier arm takes to rise and then fall (6 seconds by default). This parameter does not affect the opening/closing speed of the barrier.
- Power Input: 12V DC.
- Communication: RS-485 communication, Wi-Fi connectivity for mobile app configuration.
- Outputs: Relay output (J1-1 brown, J1-2 yellow) for alarm, program loading control, and barrier closing signal input (J2-1 white, J2-2 purple).
- Indicators: Two LED indicators: solid red for power supply, solid green when a target is detected (turns off when the target leaves).
- Dimensions: Approximately 112 mm (4.4 inches) wide, 136 mm (5.4 inches) high, and 29 mm (1.1 inches) deep.
- Environmental Adaptability: Designed to withstand harsh environments, with detection performance unaffected by electromagnetic interference, light, dust, rain, or snow.
- Service Life: 5–10 years.
Usage Features:
- Installation Flexibility: Can be installed vertically to the lane direction, either on the casing of a boom barrier (for anti-smashing) or on a pole (for triggering snapshots). The lower side of the radar should be 0.6 m (2.0 ft) from the ground (70 cm or 27.6 inches recommended for large trucks).
- Configuration via Mobile App (STJ79):
- Wi-Fi Connection: Connects to the radar's Wi-Fi network (default name: AWHST_DZ_01, password: 123456789).
- Parameter Setting: Allows adjustment of basic and advanced parameters such as Max Range, Falling Time, Mode (anti-smashing or triggering snapshots), Left Width, Right Width, Min Range, Sensitivity, and DPV (distinguishing people and vehicles).
- Firmware Upgrade: Supports firmware upgrades through the app. A "Standby Mode" is available for recovery if the upgrade fails or the radar crashes.
- Wi-Fi Information Modification: Enables viewing and modification of the Wi-Fi account and password.
- Real-time Data Viewing: Displays real-time detection data, showing detected targets as green dots. This feature helps in identifying and filtering out interference by adjusting the Min Range.
- Anti-smashing Functionality: When configured for anti-smashing, the radar detects vehicles and people, preventing the barrier arm from falling on them. It can differentiate between people (no green indicator, barrier arm does not fall) and vehicles (green indicator on, barrier arm falls after vehicle leaves). It ensures the barrier arm does not hit vehicles or people even if they stop within the detection range or pass at low speeds.
- Triggering Snapshot Functionality: When configured for triggering snapshots, the radar detects vehicles (green indicator on, camera captures pictures, barrier opens) but ignores people (no green indicator, camera does not capture, barrier does not open). It prevents multiple snapshots for a single vehicle and maintains a capture position error of less than 1 m (3.3 ft) for vehicles passing at speeds up to 30 km/h.
- Interference Filtering: Uses advanced algorithms to filter interference, making it suitable for various barrier types (advertising, fence arm, straight arm, folding arm).
Maintenance Features:
- Easy Installation: Compared to traditional coils, the radar is installed by tightening screws, eliminating the need for road construction.
- Cleaning: The surface of the radar should be cleaned with a soft dry cloth or a soft cloth dipped in neutral detergent, then dried.
- Firmware Updates: Regular firmware updates are recommended to ensure the system is equipped with the latest security patches and fixes.
- Troubleshooting: The manual provides guidance for common issues, such as the green indicator remaining on after a vehicle leaves (check for metal objects, adjust detection range, or restart the radar) and Wi-Fi connection problems (verify phone's Wi-Fi connection and default credentials).
The device is designed for convenient installation and maintenance, offering a robust solution for intelligent access control and safety in various traffic management scenarios.
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