Grounding classification of vibration cable alarm system

The "Kian An" vibration cable alarm system operates on a principle similar to radar technology. A detection signal is sent along the vibration cable, and at the same time, a reflected signal is captured. Through digital signal processing, the system calculates the location of an intrusion based on the time difference between the transmitted and reflected signals. The strength of the signal corresponds to the amplitude of the vibration, allowing the system to detect different types of disturbances. Advanced intelligent algorithms are used to distinguish between actual intrusions—such as cutting or climbing—and false triggers caused by environmental factors like rain, wind, or passing vehicles. This significantly reduces the rate of false alarms. The system is capable of accurately identifying intrusion events and pinpointing their exact locations with a positioning accuracy of 1 meter and a tolerance of ±2 meters. **A) Classification of Grounding Roles** Grounding is generally categorized into two main types: protective grounding and functional grounding. 1. **Protective Earthing** - **Earthing against Electric Shock**: This type of grounding is used to prevent electric shocks from exposed conductive parts that may become energized due to insulation failure or leakage. By grounding these parts, the risk of electric shock is minimized, and it also helps in limiting high voltages caused by surges or lightning. - **Lightning Protection Grounding**: Designed to safely direct lightning currents to the earth, reducing the risk of injury or property damage. - **Anti-Static Grounding**: Used to dissipate static electricity, preventing damage to sensitive equipment such as integrated circuits in electronic devices. - **Anti-Corrosion Grounding**: Involves using sacrificial anodes or cathodes to protect buried metal structures, cables, and pipes from electrochemical corrosion. 2. **Functional Grounding** - **System Grounding**: Ensures stable operation of power systems and improves the reliability of protection devices. Typically involves grounding the neutral point in AC systems or the midpoint in DC systems. - **Logic Grounding**: Provides a stable reference potential for electronic systems, often implemented through metal backplanes. - **Shield Grounding**: Reduces electromagnetic interference by grounding shielding layers, improving signal integrity. - **Signal Grounding**: Ensures accurate measurement and detection by providing a stable reference point for signals. **B) Classification by Grounding Type** Grounding electrodes can be classified based on their layout, shape, and structure. They may be either external or loop-type, and come in forms such as rods, bands, or rings. Grounding electrodes can also be natural (e.g., metal water pipes, structural steel) or artificial (e.g., galvanized steel, copper). Natural grounding is typically used where metal structures are already connected to the earth, while artificial grounding is employed when natural options are not available or unsuitable, especially in corrosive environments. After installation, grounding systems significantly enhance electrical safety. However, if the grounding setup consists of a single electrode or an external ground, there may still be risks due to uneven voltage distribution across the ground. Additionally, the reliability of a single or externally connected grounding electrode is limited. For example, if the two main lines connecting the external grounding pole to the indoor system are damaged, the entire grounding system could fail. While simultaneous damage to both lines is rare, it highlights the importance of redundant grounding methods to ensure continuous protection. The "Kian An" vibration cable alarm system is designed to operate with high precision and reliability. Its radar-like detection mechanism allows for real-time monitoring and accurate localization of intrusions. By combining signal analysis with intelligent filtering, the system effectively distinguishes between genuine threats and environmental noise. This makes it ideal for securing perimeters in areas where false alarms must be minimized, and accurate location tracking is essential. Whether used for security fencing, industrial sites, or critical infrastructure, the system offers a robust solution for detecting unauthorized access.

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