The network system is composed of a detector host and a specialized sensing cable. The sensing cable is installed in a serpentine pattern to maximize its sensitivity and coverage. One end of the cable is connected to the detector via a feeder, which has a standard length of 3 meters. Each sensing cable can extend up to a maximum of 400 meters, depending on the application requirements.
**Working Principle**
The sensing cable features a core wire, a sound-absorbing film, a shielding layer, and an outer jacket. Its main function is to detect surface acoustic waves. When properly buried underground according to design specifications, it can pick up even the slightest vibrations or sound waves from the ground surface. If these waves meet specific amplitude and frequency thresholds, the detector sends an alarm signal to the control host—typically a zone alarm system—triggering an alert.
**Installation Precautions for Vibration Cables**
1. Avoid installation during thunderstorms to prevent electrical damage.
2. Do not place the detector in areas with high humidity.
3. Workers must receive proper safety training and technical instructions before installation.
4. In case of any malfunction, disconnect the power first before performing inspections to avoid further damage.
5. Ensure that cables do not cross each other and are laid tightly without overlapping. Any excess should be cut and reinstalled.
6. All bends in the cable and feeders must follow smooth curves, avoiding sharp angles.
7. Keep the sensing cable at least 10 meters away from roads and 3 meters from sidewalks to avoid interference from vehicles and pedestrians.
8. Maintain a minimum distance of 20 cm between the sensing cable and power or signal cables.
9. All connectors must be waterproofed. The resistance between the core and shield should be infinite, the core resistance should not exceed 50 ohms, and the shield resistance should be less than 100 ohms. Record the orientation of all joints for future maintenance.
**Laying the Vibration Cable**
In areas with good soil conditions, direct burial is recommended.
1. Dig a rectangular trench in the protected area. The depth should be 15 cm, and the width 100 cm.
2. Ensure the bottom of the trench is compacted and level.
3. Lay the cable in a serpentine pattern at the bottom of the trench, with a spacing of 30 cm and a width of 80 cm. Before laying, check and test all cable joints with a multimeter, and record their positions for maintenance. Use fine soil to fill the trench and ensure it is level.
4. In sandy, sloped, or rocky areas, consider additional measures such as using wire mesh between the cable and grass to prevent damage from animals or people. Regular checks for rodents are also advised.
**Operation Steps for Installation**
1. Carefully strip 7 cm of the outer jacket of the sensor cable using a utility knife. Remove 4 cm of the shielding layer using a non-metallic tool like a toothpick, being careful not to damage the sound-absorbing film. Tin the shield’s end. Strip 1 cm of the feeder’s core and tin it.
2. Solder the core wires of the cable and the feeder. Ensure the soldering is secure but avoid overheating to prevent damage to the sound film.
3. Cover the soldered joint with thin insulation tape, making sure it is smooth and does not touch the sound film.
4. Solder the shield of the cable to the shield of the feeder, keeping the soldering time short.
5. Wrap the joint with high-pressure self-adhesive waterproof tape, starting from the outer jacket. Smooth it carefully and keep your hands clean to avoid dirt.
6. Apply a layer of regular waterproof tape over the high-pressure tape to increase durability.
7. Ensure all connectors remain dry and soldered securely.
8. The feeder itself does not generate a detection signal and can be embedded within a protective pipe for added protection.
The classification of electric vehicles is as follows:
Electric vehicles can be divided into electric bicycles, electric motorcycles, electric unicycles, electric quadricycles, electric tricycles, and electric scooters based on the number of tires and structural types.
Electric Bicycles, Electric Motorcycles, Adult Electric Vehicles, Children's Electric Toy Cars, Electric Trucks, Electric 3-Wheelers, Electric 4-Wheelers.
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