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B7 series embedded Linux positioning vibration fiber optic system debugging

System Introduction

B7 series embedded Linux positioning vibration fiber optic system is a positioning vibration fiber optic product using embedded Linux system.

It is composed of a linux positioning vibration optical fiber host (hereinafter referred to as the optical fiber host) and a sensor optical cable.

1.1 System Structure

1.2 Working Principle

B7 embedded Linux positioning vibration fiber optic system uses a customized Linux system and industrial-grade dedicated chips to improve system security and reliability.

At the same time, it achieves low false alarm and low power consumption.

Optical fiber vibration sensing uses the principle of "photoelastic effect" and adopts ÿ-OTDR technology (backward Rayleigh scattering). The laser signal travels along the 1-core sensor optical fiber.

The phase of the scattered light with one thousandth of vibration in the outside world changes and returns along the sensing optical cable. After photoelectric conversion, collection and analysis, the

It can detect effective intrusion signals and calculate the transmission time of one thousandth of the scattered light multiplied by the propagation speed of light in the optical fiber to achieve precise positioning.

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1.3 Parameters

5km single channel: ±1 meter

5km dual channel: ±1 meter

15km single channel: ±1 meter

15km dual channel: ±1 meter

Model, positioning accuracy

25km single channel: ±2 meters

25km dual channel: ±2 meters

60km single channel: ±4 meters

60km dual channel: ±4 meters

Operating Voltage AC100-240V (50-60Hz) or DC18~36V

2~15km single and dual channels: 30W

25km single and dual channels: 60W

Power consumption

60km single channel: 60W+20W (Raman)

60km dual channel: 60W+20W*2 (Raman)

Operating temperature Host: -20ÿ~60ÿ, Sensor cable: -40ÿ ~ 70ÿ

Working humidity 0~95%R.H

Power output interface 1 way DC12V 1A

2 RJ45 network ports 100M/1000M adaptive, 1 RS485 communication port

Communication Interface

mouth

Extension ports 3 USB3.0 interfaces, 1 DP interface, 1 audio input interface

Alarm input interface 4-way split-line alarm input

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Fiber Optic Interface 1 FC/APC/Channel

1-way intrusion alarm switch output interface, 1-way fault alarm output interface,
Alarm output interface
Contact capacity DC12V 1A

Alarm response time: intrusion alarm ÿ 2S, fiber break alarm ÿ 1S

Frequency response range 0~20kHz

size Size: 548*428*90mm, including handle 580*488*90mm

1.4 Fiber host indicator lights and interfaces

1.4.1 Indicator Lights

Front Panel

POWER Power indicator light, the detector is normally powered on and always on

OK Working indicator light, the detector is normally on and all defense zones are disarmed

After extinguishing

Fence Zone alarm indicator light, zone alarm indicator light is always on

ERROR Fault indicator light, detector fault indicator light is always on

1.4.2 Interface

Back panel

Power switch AC220V power switch

AC220V Main power interface, AC220V power supply

DC24V Backup power supply interface, DC18~36V power supply

DP Display interface, external display for local display

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Audio output interface, external speaker to realize local alarm prompt sound

Usb3.0 interface, external mouse, U disk

100M/1000M adaptive network interface

1ÿ2

CH1 Channel 1 optical signal input interface, interface type: FC/APC

CH2 Channel 2 optical signal input interface, interface type: FC/APC

Weak current terminal blocks

Intrusion alarm Intrusion alarm switch output interface, normally open, common, normally closed

NOT LIKE NC Contact capacity: DC12V/1A

error alarm Fault alarm switch output interface, normally open, common, normally closed

NOT LIKE NC Contact capacity: DC12V/1A

AB RS485 bus interface, external address code and other peripherals

N 1~4 GND Local branch line interface

12V GND DC 12V output interface, output current <1A

Two applicable scenarios

Protection requirements fence Installation Precautions

1. Wave-type installation, sensor optical cable left

The sensor optical cable is directly tied to the elastic

Elastic isolation net Right spacing ÿ 0.5 meters.

Isolation Net

2. It must be laid evenly.

Add a buckle net on the top of the fence to pass

Hard iron fence 1. A buckle net must be installed.

The photosensitive cable is tied to the buckle net

Anti-intrusion

The sensor cable is tied in the barbed wire net 1. Must be tied to the thorn net bracket
Barbed wire on top of fence
On the wire superior.

Wall top covered with buckle net, sensor optical cable

a 1. A buckle net must be installed on the top of the wall.

Installed on buckle net

Anti-chisel wall solid wall Installation of sensor optical cable on the wall 1. Install close to the wall.

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1. The foundation for laying vibration optical cables needs to be stable

Solid, not soft soil.

2. It is recommended to lay a layer of sand first.

Anti-digging, anti-

Soil and lawn sensor optical cable buried installation Stone (stone diameter < 1 cm), then

Crossing

Lay soil lawn etc on the surface.

3. The entire covering layer must be controlled within

3-5 cm.

2.1 Elastic isolation net to prevent climbing

2.1.1 Installation method

Two fences can be laid in an S shape, with the left and right spacing controlled within 0.5 meters. (As shown below)

2.2 Hard iron mesh to prevent climbing

2.2.1 Construction auxiliary materials

Buckle net, elastic accessories:

Requirements for buckle mesh customization: The hole diameter is 6cm X 6cm (customizable size) (wire diameter 3mm). And the buckle mesh has a unit grid at the upper and lower ends

The wires at the width and the wires in the middle must be parallel double tracks with a spacing of 5-6mm to achieve a tight fixation between the gasket and the spring. The style is as follows:

Buckle net diagram:

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Elastic accessories structure

picture:

Installation diagram:

2.2.2 Fence installation

Since the iron fence is relatively strong and the vibration effect is not good, in order to better realize the detection alarm, it is necessary to use additional buckle nets or wire meshes.

Increase sensitivity. Add a medium above the fence, 40cm~50cm in height, and lay the optical cable on the medium. (As shown below)

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2.2.3 Treatment methods of cement columns

Install elastic buckle net on the cement column, and lay the sensor optical cable on the buckle net. (As shown below)

2.3 Barbed wire to prevent overturning

2.3.1 Installation method

The sensor optical cable is laid in a straight line and installed on the barbed wire support. (As shown below)

2.4 Anti-climbing of solid walls

2.4.1 Construction Auxiliary Materials

See 4.3.1.

2.4.2 Installation method

First, use elastic fittings to fix the buckle net on the top of the wall, and lay the sensor optical cable in an S shape on the elastic net. (As shown below)

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2.5 Solid wall anti-chisel wall

2.5.1 Installation method

Place the vibration optical cable close to the wall to facilitate vibration transmission. (As shown below)

2.6 Underground installation of anti-penetration and digging

2.6.1 Soil quality requirements

ÿ Foundation: The foundation for laying vibration optical cables needs to be stable and cannot be soft soil. If it is soft soil, sand and stone need to be laid on the foundation before laying.

Install optical cable.

ÿ Covering: It is recommended to first lay a layer of sand and gravel (gravel diameter <1 cm) as the covering layer, and then lay soil, lawn, etc. on the surface.

ÿ Note: The entire covering layer needs to be controlled within 3-5 cm.

2.6.2 Construction requirements

Burying method:

The following layers are laid on the foundation in order: plastic grid ÿ vibration optical cable ÿ geotextile ÿ covering (camouflage) layer.

ÿ The foundation needs to be strong and not soft;

ÿ The thickness of the topmost covering layer should not exceed 5 cm;

ÿ Be careful when using tools such as shovels during landfill to avoid damaging the optical cable;

ÿ If the optical cable is broken, the splice package needs to be buried deep in the foundation.

Wiring method:

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ÿ The sensor optical cable is tied to the plastic grid using cable ties and the optical cable is laid in a sinusoidal wave pattern;

ÿ a. Do not bend the optical cable too much when fixing it;

ÿ b. The spacing d should be less than 30 cm.

2.7 Anti-destruction of pipeline installation

2.7.1 Installation method

The sensor optical cable is laid in a straight line directly above the pipeline, 1.5 meters above the ground. (As shown below)

3. Installation and debugging

3.1 Installation of sensor optical cable

ÿ One-line laying: simple laying, saving optical cables, small prevention and control area, and may cause missed reports. (As shown below)

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ÿ Wave-type laying: The control area is large, the left and right spacing of the sensor optical cable is ÿ0.5m, and the laying height is ÿ70% of the protection height. It must be even.

Laying. (As shown below)

3.1.1 Installation Notes

ÿ The internal alarm buzzer of the fiber host must be turned off (off by default).

ÿ The fiber optic host must be kept away from warning lights/horns, intercoms and other devices with strong audio signals.

ÿ It must be placed in an environment without strong vibration.

ÿ The on-site sensor optical cable must be laid smoothly and reasonably, and any entanglement, knotting and other problems must not be allowed to occur.

ÿ The welding quality is high (the welding machine display loss must be ÿ0.02dB), and the on-site welding points must all be welded according to the requirements.

Direct connection with flange head is adopted.

ÿ Cable ties must be made of UV-resistant material or metal wire, and the ties must be securely tied to avoid false alarms caused by shaking.

ÿ The sensor optical cable is tied every 30cm;

ÿ The bending diameter of the optical cable at the corner should be ÿ30cm.

ÿ If the defense zone length is greater than 500 meters, reserve 5 meters of sensing optical cable every 100 meters for fiber breakage/fiber melting (reserved optical cable coil diameter ÿ

30cmÿÿ

3.1.2 Notes on fiber splicing (important)

The following standards are based on the communication welding standards, and can be achieved by regular fiber fusion.

Simple parameters:

ÿ n Total average loss <0.4dB/km (25km corresponds to 10dB);

ÿ n Single point <0.3dB (also applicable to F5);

ÿ n Optical fiber <0.25dB/km (no splice, F5 also applies);

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ÿ n It is preferred to use 2km optical cable in a reel to reduce the number of splicing points.

specification:

Fiber attenuation constant:

ÿ 1310nm band: maximum ÿ0.36dB/Km, average ÿ0.35dB/Km;

ÿ 1550nm band: maximum ÿ0.25dB/Km, average ÿ0.22dB/Km.

3.1.3 Connection loss

The splicing loss is the average value of the loss measured from two directions using an OTDR after the optical fiber is fused, fixed, coiled, and the optical cable sealing box is tightened.

The fiber splicing points in the optical cable line are required to meet the following requirements:

ÿ 1310nm band single connection point connection loss 0.1dB (inclusive) ÿ 70%, single connection point connection loss: 0.2dB (inclusive) ÿ

90%, the maximum connection loss of a single connection point ÿ 0.30dB;

ÿ 1550nm band single connection point connection loss: 0.1dB (inclusive) or less ÿ70%, single connection point connection loss: 0.2dB (inclusive) or less

ÿ90%, the maximum connection loss of a single connection point ÿ0.30dB.

3.2 Connection between optical fiber host and communication optical cable

CH1 and CH2 correspond to the optical cable access of channel 1 and channel 2 of the optical fiber host respectively.

The optical cable is routed around to the optical cable flange joint. When winding the cable, the corner should be as large as possible, and the arc radius should not be less than 10 times the diameter of the optical cable.

3.3 On-site debugging

After the vibration optical fiber system is installed, turn on the host power switch and deploy the corresponding defense zone through the host computer. The green light of the corresponding defense zone will turn on.

If the corresponding zone sensor cable is vibrated, the corresponding zone alarm will be triggered. If the red light of the corresponding zone is not on or the green light keeps flashing, please recheck the wiring, software, and other aspects.

The device parameter settings or whether there is light returning to the host.

3.4 Common tools usage

3.4.1 Optical Power Meter

An optical power meter is an instrument used to measure the absolute optical power or the relative optical power loss through a section of optical fiber.

The following figure)

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Precautions:

ÿ The laser wavelength of our fiber optic products is 1550nm. Click "ÿ" to select

ÿ The optical fiber connector needs to be tightened during measurement

ÿ Optical power is usually expressed in dBm, and the calculation formula is: 10 lg (power value/1mW). The conversion is as follows:

ÿ 1mWÿÿ10 lg( 1mW/1mW )= 0dBm

ÿ 2mW ÿ ÿ 10 lg(2mW/1mW )= 3dBm

ÿ 10mWÿÿ10 lg( 10mW/1mW )=10dBm

3.4.2 Red light pen

Red light pen is also called light pen, pen-type red light source, visible light detection pen, fiber optic fault detector, fiber optic fault locator, etc. Most of them are used for detection

Fiber breakpoints are generally classified according to their detection distance length: 5Km, 10Km, 15Km, 20Km, 25Km, 30Km, 35Km, 40Km

Etc. Generally, there are three levels: CW (continuous light), OFF (switch), and GLINT (flash light). (As shown below)

When the line is blocked, you can use a red light pen to detect the breakpoint. GLINT detection is often used. When a breakpoint is encountered, there will be strong leakage light.

The following figure)

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Precautions:

ÿ The red light pen has high power, so do not look directly into the light outlet.

ÿ There will be some light leakage at each welding point of the heat shrink tubing. As long as it is not too strong, there is no need to re-weld the point.

3.4.3 Fiber Optic Cleaner

Fiber optic cleaners, also known as fiber optic interface cleaners, are used to clean the end faces of various fiber optic interfaces in fiber optic communication transmission networks.

Precautions:

ÿ The fiber optic tip needs to be cleaned vertically with the cloth.

ÿ Wipe in one direction only, never wipe back and forth.

ÿ The internal cleaning cloth moves in a single direction, one less time is pressed.

3.4.4 Fiber Optic Patch Cord Types

There are many types of fiber optic patch cords. According to the packaging type, there are: FC, SC, LC, ST, E2000, etc.; according to the port type, there are: PC, UPC, APC

Etc. (As shown below)

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Our F series products use FC/APC single-mode patch cords, which are easily confused with FC/UPC patch cords in actual use.

The difference between the two types of jumpers.

Type Fiber end face Return loss Exterior picture

FC/APC 8° contact surface 55dBm green

FC/UPC curved contact surface 50dBm black

Four system configurations

4.1 Debugging device connection

ÿ Use network port 1 to connect to the switch, and the debugging computer and network port 1 are in the same network segment;

Network port 1 (default)

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IP address 192.168.9.170

Subnet Mask 255.255.255.0

Default Gateway 192.168.9.1

4.2 Login to the Fiber Host

The fiber host B/S architecture uses a browser (Google Chrome is recommended) to access the fiber host IP, enter the login interface, and log in using different users.

The default administrator username is admin, and the default administrator password is 123456.

: Displayed when the connection with the host computer platform is successful

: Current date and time in the fiber host

: Current logged in user name

4.3 Adding Users

ÿ System Configuration->User Management menu;

ÿ By default, there is 1 administrator user, and all new users are operators;

ÿ Administrator rights: map operation, alarm record, parameter setting;

ÿ Operator authority: map operation, alarm record.

4.4 Configure Fiber Host Network

ÿ System Configuration->Basic Configuration Menu;

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ÿ Fiber local network configures the network and saves it.

Note: It is recommended to use network card 1 and avoid using network card 2.

4.5 Fiber Optic Host Time Synchronization

ÿ System Configuration->Basic Configuration Menu;

ÿ Synchronize PC time: Select Manual setting, check Synchronize with computer time, and click Synchronize now;

ÿ You can choose to automatically synchronize with the cloud platform and NTP time server.

4.6 Connecting to the management platform (taking sam200 and sa200 as examples)

ÿ System Configuration->Basic Configuration Menu;

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ÿ Select sam200 for the center address, fill in sam200 for the platform IP, leave the port number as default, and save.

Note: The fiber host must be restarted after setting up.

4.7 Configure SMS sending

ÿ The optical fiber host is connected to the external network;

ÿ System Configuration->User Management: Fill in the mobile phone number and check Send SMS;

ÿ System Configuration->Basic Configuration: Check Send alarm SMS and save.

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4.8 Add external devices

ÿ System Configuration->External Devices->Device List Menu;

ÿ Add device: The added device is the fiber host RS485 bus, network external devices, such as address code, light control module, electronic map video

Linkage module;

ÿ Add device: Select the registration method and enter the corresponding IP and address, then click Save;

Note: The IP and address of the device must be correct and the communication must be normal, otherwise it will be displayed as offline in the list.

ÿ Synchronize external device defense zone: Check the defense zone that needs to be synchronized to the fiber host in the list, click Synchronize, and only the synchronized defense zone will be in the defense zone list.

The table will show;

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ÿ Output list: If the added external device is a lighting control module or a video linkage module, it will be displayed in the output list;

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4.9 Configure vibration fiber channel information

Configure vibration fiber channel information.

ÿ Parameter configuration->Basic parameter configuration menu;

ÿ Fill in the perimeter starting point and the optical cable location;

ÿ Check the channel to be used and automatically obtain the optical cable length and save it.

4.10 Fiber Optic Host Zone Initialization

Initialize the fiber host local zone.

ÿ System coordination->Zone configuration->Zone initialization menu;

ÿ Enter the total length of the perimeter and the number of defense zones;

ÿ Check the local branch line system zone to be used.

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4.11 Defense zone information editing

ÿ System Configuration->Zone Configuration->Zone List Menu;

ÿ Click the edit button in the defense zone list to modify the defense zone information;

ÿ After the defense zone is automatically generated, you can export an excel sheet and modify it in the sheet before importing it into B7.

4.12 Zone linkage output

ÿ System Configuration->Defense Zone Configuration->Linkage Output Menu;

ÿ Add external devices such as lighting control module and video linkage module to the optical fiber host;

ÿ Select Batch Add and click Settings to add defense zones;

ÿ Select the output port number that needs to be linked. A single zone can link multiple output ports and save them.

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4.13 Defense Zone Customization Plan

ÿ System Configuration->Zone Configuration->Timer Plan Menu;

ÿ Select batch add and select scheduled arming and disarming time.

4.14 Electronic map editing

ÿ System Configuration->Map Configuration menu;

ÿ Electronic map images support jpg format, with a resolution of no less than 1024*768;

ÿ Add electronic map pictures: Add map button or modify map button, select pictures in the local folder;

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ÿ Select a channel and click Draw to draw the defense zone line on the image;

ÿ Draw the defense zone line: Place the mouse on the map to select the location and click the left button to enter the perimeter length. After drawing, click Pause Drawing;

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ÿ After the electronic map editing is completed, it will be automatically saved when switching to other interfaces.

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4.15 Fiber Host Program Upgrade

ÿ System Configuration->Upgrade & Maintenance menu;

ÿ The upgrade file is stored locally;

ÿ Select the upgrade file package and click Upgrade. After the upgrade is complete, the fiber host will automatically restart.

4.16 Fiber Host Data Backup and Recovery

ÿ System Configuration->Upgrade & Maintenance menu;

ÿ Fiber host backup data is stored locally;

4.17 Check the fiber host version

ÿ System Configuration->Version Information menu.

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4.18 Threshold Configuration

ÿ System Configuration->Threshold Configuration;

ÿ Set the threshold according to the actual use of the defense zone;

ÿ The threshold supports channel and segment settings, and the alarm signal threshold is specified for each point of the optical cable;

ÿ The threshold value needs to be adjusted on site. When setting, conduct an on-site knock test to observe the signal value generated by the vibration, and then set it slightly lower than the signal value.

The threshold value of

ÿ In theory, the threshold should be higher than the noise when stationary and lower than the signal value when intrusion occurs (knocking on the fiber fence).

Combine false positives and missed positives and make adjustments;

ÿ Threshold setting reference value: signal value - (signal value - noise value)/3;

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ÿ Threshold setting method (phase):

1) Absolute value: Specify the starting and ending thresholds within the selected distance range, and draw a diagonal line as the threshold line

2) Relative value: Enlarge/reduce the threshold value within the selected distance range proportionally

3) Manual drawing: Double-click the chart area within the selected distance range to start or end drawing.

ÿ Threshold setting method using reference (phase):

1) Draw a line to set the benchmark using the "absolute value" method;

2) Fine-tune using the “relative value” method;

3) "Manual drawing" to handle complex threshold settings;

ÿ Threshold setting method using reference (amplitude):

1) Usually select "Automatic calculation" and "Multiplier 1", click "Calculate", and save;

2) If there are frequent false alarms at a certain location, you can double-click the location in the chart to view the real-time amplitude and adjust the threshold based on the real-time amplitude.

3) "Manual drawing" to handle complex threshold settings;

4.19 Alarm filtering scheme settings

ÿ System Configuration->Channel Details;

ÿ The alarm filtering scheme is a judgment scheme for whether to give an alarm after the signal exceeds the threshold, thereby filtering out false alarms;

ÿ The specific value is adjusted according to the on-site situation

ÿ Parameter meaning:

Spatial filtering: This is only effective if the spatial scope of the event is within this range, and can filter out occasional small events and strong winds.

Time filter: If the event duration is less than this time, it will be filtered.

Spatial merging: If two events are smaller than the spatial merging distance, the two events are merged into one.

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Lifecycle: Time merging. If an event remains dormant for a long time (not exceeding the threshold), the event will be deleted.

ÿ “Event” logical judgment process

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4.20 Basic debugging process

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