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Blasting vibrometer L20-X【Online version】 It is a stable and feature-rich network blasting vibrometer designed for remote sensing of blasting vibrations on the Internet. Users only need to install a phone card in the instrument card slot to be in any place with a mobile phone network. Realize remote control instruments and management documents, especially suitable for construction projects that require long-term monitoring such as bridges, tunnels, and ancient buildings. First, the applicable field [1] Items with fixed observation points and long monitoring period and high frequency.For example, the protection object is a monitoring occasion for existing lines, bridges, dams and ancient buildings;
[2] Items that are difficult to reach or non-repeatable at the observation point.Such as: observation points in the operation of subway tunnels, electrified railway tunnels and permanent high-steep slopes;
[3] Items with many observation points and wide distribution.Such as: online vibration monitoring along the railway line and oil pipeline;
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| Second, advantages and characteristics |
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 Legal complianceDirectly measure the vibration velocity value and the main vibration frequency of the three components, so that the test results are more accurate, and the test method fully complies with the regulatory requirements of the public security department and the blasting industry standard; |
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Leading technology Based on 24-bit acquisition technology, the sensors, vibrometer and mobile network are highly integrated into one, which improves the stability and practicability of the instrument. |
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Network Monitoring Built-in 4G network, support Wi-Fi, LAN and other external network access, operators can remotely access the instrument through the Internet anytime, anywhere, for instrument control and file management operations； |
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Alarm warning Support alarm alarm event setting. When the amplitude exceeds the standard or the device is abnormal (power down, offline) and other events occur, the instrument will actively push the alarm message. |
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Do not pick points The square structure of the aluminum alloy shell has the ability of dustproof, waterproof and impact resistant, and can better adapt to the installation of the floor, side wall and top arch;
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Easy to expand Provide a complete communication package protocol, which can be customized not only according to the user's individual needs, but also seamlessly connected to the user's various IoT monitoring systems. |
 First, the function Vibration record
1．Level mode
2．Internet remote access monitoring
data collection
1．LAN access
2．Data center remote download
Remote communication
1．Built-in mobile network to support Telecom, China Unicom, mobile 2, 3, 4G network
2．Support LAN/WAN/ADSL wired network access
3．Support Wi-Fi wireless network access
Signal analysis
1．Frequency spectrum / power spectrum / first order integral / first order differential / high low pass filtering
2．Three vector synthesis calculation
3．Sadowski's empirical formula calculates K andα
Monitoring report
1．Incident report
2．Seismic wave attenuation calculation report
Other functions
1．SMS/email alert when vibration exceeds control value or device is abnormal
2．Remotely calibrate the instrument zero point through the data center
3．Remotely upgrade and maintain the system through the data center
4．Actively synchronize the clock with the network information center
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Second, performance
Performance
aisle: 3 channels, built-in vibration speed sensor Quantity ：0.0017~35cm/s， Resolution：0.0001cm/s Fine degree：±5% Frequency Range：5~500Hz A/D accuracy：0.000021mm (24Bit) Time accuracy：0.01ms (100k sps) Waveform record
Record mode: manual, single, loop Vibrating contact valve：0cm/s~3.5cm/s Record stop: fixed record duration Recording time: 1s~99s, plus 0.25 seconds before the trigger time Storage capacity: 10240 files with a duration of 4 seconds Physical parameter
size：70mm*70mm*70mm， weight：0.56kg Display: 0.96 inch OLED screen, showing working status Button: 4 touch buttons Output interface: USB2.0 interface and Rj45 network port Operating environment: -30~75 °C, 90 % RH Protection level: IP57 Other: standard installation fixtures, equipment Warranty: Warranty period is one year (only change) |
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First, the standard list
L20-X vibration monitor
Power adapter (charger) protection box
One power supply cable, one network cable, and one multi-function data cable
4G antenna, detachable CD or U disk contains client installation package, operation tutorial
One copy of the manual, warranty card, certificate of conformity, and factory inspection report
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| 二、Power supply and communication expansion In the medium and long-term blasting vibration monitoring project, if there is no external power supply at the measuring point or the external power supply wiring is inconvenient, the user can select a large-capacity battery pack or a solar power generating device to supply power to the monitor;If there is no mobile network coverage at the measurement point, the user can extend the communication through wired or wireless relay to realize automatic monitoring of blasting vibration; |
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Blasting vibrometerField of application of L20-X
[1] Items with fixed observation points and long monitoring period and high frequency
For example, the protection object is a monitoring occasion for existing lines, bridges, dams and ancient buildings; [2] Items that are difficult to reach or non-repeatable at the observation point Such as: observation points in the operation of subway tunnels, railway tunnels and permanent high-steep slopes; [3] Items with many observation points and wide distribution Such as: online vibration monitoring along the railway line and oil pipeline; |
Example 1:Special geological disaster emergency rescue project of South Luliangshan Tunnel on Wadi Line L20-X participated in the monitoring of the impact of construction blasting vibration on the operation line of the South Luliangshan tunnel. The length of the tunnel is 22 kilometers. The power supply condition is available in the tunnel, and there is mobile phone signal coverage at the measuring point. Based on the L20-X blasting vibrometer An automated monitoring system was built to achieve simultaneous monitoring of 28 working faces.
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Example 2:Monitoring the Influence of Blasting Construction of Huangpupo Tunnel on the Vibration of Existing Miaoshan Slope Tunnel The L20-X blasting vibrometer is involved in the monitoring of the vibration impact of the newly constructed diversion tunnel on the existing highway tunnel. The existing road tunnel has a good mobile phone signal, and the battery is combined with the low-power L20-X to solve the problem of power supply and transmission. The remote monitoring and blasting vibration of the Internet is realized, and a large amount of monitoring workload is reduced.
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First, installation and use
Before the blasting, install an internet phone card into the instrument, fix the instrument with the clamp, connect the instrument power to leave the site, remotely access the instrument through the client in different places, complete the parameter setting and start the acquisition, and the instrument will enter the work. State; when the vibration signal of each shot comes, the instrument will automatically record and store the vibration signal, and upload the collected dynamic waveform to the data center in real time;A few minutes after each shot is detonated, the user analyzes the uploaded data through the client in a different place, and produces a corresponding type of monitoring report according to the requirements;
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 Side wall mounting1. Select the flat wall as the mounting point to reflect the real vibration. 2. Mark the drilling position and punch with the electric drill.
3. After the instrument and the fixture are assembled, they are fixed on the wall by expansion screws.
4. Connect the antenna to the power supply.
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| Second, measurement and calibration The National Vibration Standards Laboratory of China Testing Technology Research Institute strictly tests and obtains the “Certificate of Verification” or “Calibration Certificate”. The data detected by the L20-X blasting vibrometer is accurate and traceable to the national benchmark; |
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