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. This signal is then processed digitally, and the location of an intrusion is determined by analyzing the time difference between the transmitted and reflected signals. The strength of the signal corresponds to the amplitude of the vibration. With the help of an intelligent identification algorithm, the system can distinguish between genuine intrusion events—such as cutting or climbing—and environmental disturbances like rain, wind, and vehicle movement. This significantly reduces false alarms. The system is capable of accurately identifying intrusions and pinpointing their exact locations with a positioning accuracy of 1 meter and an error margin of ±2 meters. **Classification of the Role of Grounding** Grounding is typically categorized into two main types: protective grounding and functional grounding. 1. **Protective Earthing** (1) **Earthing Against Electric Shock**: This involves grounding the non-current-carrying conductive parts of electrical equipment to prevent electric shocks in case of insulation failure or leakage current. It also helps limit high voltage caused by surges or accidental contact with high-voltage lines. In the event of an electrical fault, it assists overcurrent protection devices in quickly disconnecting the power supply. This is considered the narrow definition of "protective grounding." (2) **Lightning Protection Grounding**: This type of grounding directs lightning currents safely into the earth, reducing the risk of electric shock or property damage. (3) **Anti-Static Grounding**: It dissipates static electricity to prevent accumulation that could harm people or electronic components. Especially important for sensitive electronics like integrated circuits, which are vulnerable to electrostatic discharge. (4) **Anti-Corrosion Grounding**: By using buried metal structures as sacrificial anodes or cathodes, this grounding method prevents corrosion of cables and metal pipes. 2. **Functional Grounding** (1) **Working Grounding**: Ensures the stability of the power system, prevents system oscillation, and supports reliable relay protection. For AC systems, the neutral point is typically grounded, while DC systems often use the midpoint. (2) **Logic Grounding**: Provides a stable reference potential for electronic equipment. Metal backplanes are commonly used as logic grounds, and this type of grounding is often referred to as DC ground. (3) **Shield Grounding**: Reduces electromagnetic interference by connecting shielding materials to the earth, thus minimizing both external interference and internal noise. (4) **Signal Grounding**: Ensures accurate measurement and detection by providing a stable reference for signals, such as in leakage current detection or impedance measurements. **Classification by Grounding** Grounding electrodes can be classified based on their layout, shape, and structure. They may be either external or loop-type. Common shapes include tubular, strip, and ring-shaped electrodes. Structurally, they can be natural or artificial. Natural grounding electrodes include water pipes, structural metal frameworks, and underground cable sheaths. However, these should not be used if they carry flammable liquids or gases. Artificial grounding electrodes are made from materials like steel, angle iron, flat steel, and round steel. In corrosive soils, galvanized steel or copper electrodes are preferred. After installing a grounding system, electrical equipment becomes much safer. However, if only a single electrode or an external grounding electrode is used, there is still a risk of electric shock due to uneven potential distribution. Additionally, the reliability of such systems is limited. For example, an external grounding electrode is usually connected to the indoor grounding trunk via two main lines. If both lines are damaged, the entire grounding system is disconnected. While simultaneous damage to both lines is rare, it highlights the importance of redundancy in grounding design. The "Kian An" vibration cable alarm system is designed to detect intrusions with high precision. Its operation is akin to radar, where a signal is sent through the cable, and any reflection is analyzed. The system uses digital processing to determine the exact location of an intrusion based on the time delay between the transmitted and received signals. The signal's strength reflects the intensity of the vibration. Advanced algorithms filter out false positives caused by environmental factors, ensuring accurate detection of real threats such as cutting or climbing. The system achieves a positioning accuracy of 1 meter with a maximum error of ±2 meters, making it highly effective for security applications.

Bx Ring Joint Gasket

Bx Ring Joint Gasket ,Bx 155 Ring Gasket,Bx Ring Gasket,Bx 154 Ring Gasket

WENZHOU JINGWEI SEAL TECHNOLOGY CO., LTD , https://www.ringjoint-gasket.com