Hello everyone, I'm Brother Xue. Recently, I was consulted about how to design the electronic fence system? Let's take a closer look today.
First of all, let's take a look at the topology diagram of the electronic fence system
First of all, look at the CAD format
Let's look at the topology diagram again
Design example of pulsed electronic fence system
Perimeter Overview:
The total length of the perimeter of a community is about 1,300 meters, surrounded by solid walls, basic rules of terrain, and the perimeter prevention level is average.
Design Essentials
Degree of precaution
When designing a pulsed electronic fence, the protection level is usually divided into three levels:
(1) General prevention, the four-wire system is adopted, and the section of the defense zone is not more than 400 meters.
(2) Medium prevention, using a four-wire system or a six-wire system, and the section of the defense zone is not more than 200 meters.
(3) High prevention, using four-wire system or six-wire system, the section of the defense zone is not more than 100 meters. (Note: The above classification is suitable for the electronic fence system installed on the fence or fence, and the design of the floor-mounted electronic fence prevention level can be implemented with reference).
Preliminary design:
Number of defense zones: 6 defense zones, with an average length of 216 meters each.
Electronic fence line system: 4 wire system, installed on the top of the fence wall, inclined outward at an angle of 30 degrees.
Alloy wire: special alloy wire for high-strength and low-resistance stainless steel is used.
Stress column: install 1 at the beginning of each defense zone (the stress column of the defense section, the adjacent defense area can share 1 stress column), and install 1 stress column at each right angle and acute angle.
Load-bearing column: install 1 load-bearing column every 20 meters in the straight section of the defense area, install 1 load-bearing column at the obtuse angle of the defense area, and install 2 load-bearing columns at the height difference (the drop is less than 0.5 meters).
Intermediate columns: 1 intermediate column is installed every 5 meters
Installation location of the main engine of the electronic fence: installed at the beginning of each defense area, on the inside of the fence, must be equipped with a rainproof box, at least 1 meter from the ground.
Power supply: It can be divided into 2 ways from the central control room to the main box of the electronic fence in each defense area, or it can be taken from the nearest site, and the power line must be set with PVC pipe or special threading pipe (iron color tube).
Alarm signal line: from the central control room using RVVP2*1.5 cable to lay into each electronic fence main chassis, the alarm signal line must be set with PVC pipe or special threading pipe (iron color tube).
The sound and light warning light and lightning arrester are installed on the nearest stress column from the main engine of the electronic fence.
Electronic fence system networking mode selection: you can choose the general alarm host/electronic fence special alarm control host/computer alarm software management, choose any of the three ways to network, you can.
General alarm host networking: in the monitoring center using a bus system of alarm host, and the corresponding operation keyboard, in each electronic fence host in the rainproof box to install 1 address coding module (if the perimeter is also equipped with infrared radiation equipment, can be configured for each pair of infrared radiation 1 address coding module, access to the alarm signal line of the electronic fence system, form a unified alarm system), the general alarm host receives, processes and displays the alarm signal of each electronic fence host, and the operation keyboard can be disarmed/armed.
Dedicated alarm control host networking: set up 1 electronic fence special alarm control host in the monitoring center, one end of the alarm signal line is connected to the RS485 terminal of the alarm control host, and the other end of the alarm signal line adopts the hand-in-hand mode, and is connected to the RS485 port in each electronic fence host in turn (if there is infrared radiation at the perimeter, it can not be connected to this alarm signal line).
The alarm control host can be remotely controlled by the electronic fence at the front end in the central control room, that is, by disarming and arming the electronic fence host, the high/low voltage (for example, set to low pressure during the day, set to high voltage at night) working mode can be adjusted to the electronic fence host. It can also display alarm categories (i.e., disconnection, short circuit, or tamper-evident), as well as alarm recovery, password setting, and other functions.
Alarm management software networking: Alarm management software is used to remotely manage 6 electronic fence alarm defense areas. Connect an RS232/RS485 conversion module on the RS232 serial port of the computer, and then access one end of the alarm signal line, and the other end of the alarm signal line adopts the hand-in-hand mode, and is connected to the RS485 port in each electronic fence host in turn (if there is infrared radiation around the perimeter, it can not be connected to this alarm signal line).
The high/low voltage (e.g., low voltage set to low pressure during the day, high voltage set to high voltage at night) working mode can be set by the alarm management software, and the electronic fence host can be remotely armed/disarmed, and the alarm signal is reset, and there is a patrol window in the software, which always displays the number of the defense area, the status of the defense area, the geographical location, the total number of defense areas, the number of armed, and the number of unarmed; Built-in electronic map, automatic pop-up electronic map when there is an alarm, can clearly display the alarm situation of the defense area (alarm area, alarm mode, alarm time), and with alarm sound; There are four alarm modes for the host: disconnection, short circuit, anti-demolition, and communication failure; The alarm software has the function of retaining information, which can be queried and printed; You can set a username and password, a general user and a super user, to prevent unnecessary misoperation.
A standard method for calculating the number of electronic fence accessories
| The name of the accessory | function | Order standard quantity |
| Pulse electronic fence host | Generate high-voltage and low-energy impulse voltages, and distinguish whether the alarm is or not. | Generally, it is decided according to customer requirements and the number of defense areas. |
| Passive Pillar | Provides tension support for electronic cables | One is used at the beginning and end of the electronic fence, as well as at each right and acute angle, and two at the height of the fence greater than 0.5 meters. |
| Load-bearing columns | Ensure the strength of the long-distance electronic fence when used. | Use 1 for every 25 meters of straight lines and at each obtuse angle, and 2 for walls with a drop of less than 0.5 meters. |
| Intermediate columns | Maintain a standard spacing between the supporting electronic cables to avoid two adjacent wires from touching. | Generally, it is required not to use 1 piece of 5 meters, (the number is calculated according to the standard 5 meters of 1 piece), the number of intermediate columns = perimeter length / intermediate column spacing - the number of stressed columns - the number of load-bearing columns. |
| Wire tighteners | It is used to tighten the alloy wire of the electronic fence | Number of wire tighteners = perimeter length / 100 meters * electronic fence alloy wire system. |
| Wire connectors | A joint for connecting alloy wires | Number of wire connectors = number of stressed columns * alloy wire system * 2 |
| Stressed post insulators | It is used for insulating alloy wires and stress columns | The number of insulators in the stressed column = the number of stressed columns * alloy wire system |
| Load-bearing column insulators | It is used for insulating alloy wires and load-bearing columns | The number of load-bearing column insulators = the number of load-bearing columns * alloy wire system |
| Intermediate post insulators | It is used for insulating alloy wires and intermediate columns | The number of insulators in the middle column = the number of intermediate columns * alloy wire system |
| Alloy wire | Carries high voltage impulse voltage | Number of alloy wires = perimeter length * alloy wire system * 1.05 |
| High-voltage insulated wire | It is used to connect the pulse electronic fence host and the front end of the electronic fence | The number of high-voltage insulated wires = the number of defense areas × the distance between the main host of the electronic fence and the alloy wire at the top of the electronic fence * the alloy wire system. (Number of standard schemes = number of defense zones * 30 meters) |
| Surge arrester | Protects the pulse electronic fence host from lightning strikes. | Lightning arrester quantity = Prevention zone quantity |
| Warning signs | Warning and informing. | Number of warning signs = perimeter length / 10 meters. |
| Grounding piles | It is used for the grounding of the main engine of the pulse electronic fence and the grounding of the arrester. | Number of grounding piles = number of defense areas * 2 |
| Universal stress column base | It is used to fix the stressed column to the top of the fence wall. | The number of universal stress column bases = the number of stress columns |
| Universal load-bearing column base | It is used to fix the load-bearing column to the top of the fence wall. | The number of bases of universal load-bearing columns = the number of load-bearing columns |
| Universal intermediate column base | It is used to fix the intermediate column to the top of the fence. | The number of bases of the universal intermediate columns = the number of intermediate columns |
| Intermediate column base fixing clip | It is used to fix the intermediate column to the base of the intermediate column. | Number of clamps at the base of the intermediate column = Number of intermediate columns * 2 |
| Terminal stress post insulator fixing clip | It is used to connect the insulator of the stressed column to the stressed column. | Terminal stress column insulator fixing clip = number of stress columns * alloy wire system |
| Sound and light alarms | Audible and visual indication of the alarm signal for each defense zone. | Number of sound and light alarms = number of defense zones |
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