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Blasting vibrometer L20-N【Universal】 L20-N blasting vibrometer is a simple operation simple vibration meter, which can be well qualified for all kinds of conventional blasting vibration testing tasks. It is also a feature-rich network vibrometer capable of independently implementing blasting vibration. Internet remote access monitoring is a special vibrometer for the needs of users. It can be customized for user testing and office needs.。 First, the applicable field [1] Vibration monitoring of blasting construction in underground, open air, demolition, etc.Such as: subway tunnel drilling and blasting, urban shallow hole blasting, cooling tower blasting demolition and other construction blasting vibration monitoring;
[2] Vibration detection items with fixed observation points, long monitoring period, high frequency or difficult to reach.Such as: adjacent railway existing lines, bridges, dams, ancient buildings, high steep slopes, etc.Engineering construction project，
[3] Detection items with wide distribution of observation points and many points.Such as: monitoring the impact of vibration on the construction project along the railway passenger line and oil pipeline;
[4] Continuous vibration monitoring induced by other activities.Such as: the impact of vibration induced by activities such as strong smashing, piling, heavy machinery transportation on nearby buildings;
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| Second, the advantages and characteristics of L20-N |
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 Do not pick up the source It provides three trigger modes with any combination of level and sampling, which not only meets the vibration test of blasting construction, but also can be used for continuous vibration test caused by construction such as strong boring, piling and drilling.task; |
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Do not pick points Support Wi-Fi, LAN and 4G communication, whether the measurement point is near the town, remote mountainous area, or super long tunnel, can quickly set up the detection network; |
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Do not pick people Support mobile phone, tablet and other mobile device clients, system management and maintenance anytime, anywhere, the interface is simple, clear structure, so that any operator can quickly grasp; |
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Ultra low power consumption The power consumption of the instrument is only 10mA in the sleep state. By setting the working period of the instrument, the remote access wakes up the instrument, and under the condition of no external power supply, it can meet the detection in the tunnel for several months; |
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Ultra high configuration Support U disk batch or single export data, automatically obtain GPS coordinate information of measuring points, use version upgrade of data center, can complete zero calibration independently; |
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Multi-level alarm Support remote active time reporting, the user only needs to set the corresponding report event type, and the instrument can actively send an alarm to the user when the event occurs or ends; |
 First, the function Vibration record
1．Waveform recording (conventional blasting occasion)
2．Histogram recording (strong, piling, drilling, heavy transport, etc.)
data collection
1．Instrument connected to computer
2．On-site U disk high-speed access
3．LAN access
4．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．Point report, source report (phased or completed report)
3．Seismic wave attenuation calculation report
Other functions
1．SMS/email alert when vibration exceeds control value or device is abnormal
2．Built-in GPS, automatic reading of position coordinates
3．Set working hours, turn the instrument on and off periodically
4．Support local and remote calibration of instrument zeros
5．Remotely upgrade and maintain the system through the data center
6．Actively synchronize the clock with the network information center
7．The instrument can store information such as users and measuring points
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Second, performance
Performance
Channel: 3 channels, standard vibration speed sensor (optional acceleration)
Range：0.0017~35cm/s，
Resolution：0.0001cm/s
Precision：±2%
Frequency Range：2~450Hz(Ideal smooth response between 1-500Hz)
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: Recording continues until the set length is stopped
Recording time: 1s~99s, 1 second step can be set continuously
Negative delay time: 0 s~0.25s, continuous setting
Storage capacity: 10240 files with a duration of 4s
Histogram recording
Record mode: sampling, sampling + (when the histogram is recorded, the trigger waveform is acquired at the same time)
Recording interval: 2s, 10s, 30s, 60s, 720s
Record stop: automatic segmentation after automatic stop or full interval
Storage capacity: 43200 intervals, 2 second interval (1 day), 720 second interval (360 days)
Physical parameter
size：175mm*108mm*72mm
weight：1.50kg
Display: 3.5 inch LCD screen, feature value, waveform display;
Battery: 7.2V lithium battery, working continuously for 3 days;
Button: 8 touch buttons,
Output interface: USB2.0 interface and Rj45 network port
Use environment：-30~75 ℃，90 ％ RH
Protection level：IP57
Warranty: Warranty period is one year (only change)
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First, the standard list
L20-N vibration monitor
TT-3/1-500HzThree-component speed sensor Power adapter (charger) protection box
Shield signal line, network cable, multi-function data cable, and USB cable
WI-FI antenna, 4G antenna, one 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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| two、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 use a large-capacity battery pack or solar power generating device to supply power to the monitor; If there is no movement at the measuring point When the network is covered, 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-N
[1] Vibration monitoring of blasting construction in underground, open air, demolition, etc.
Such as: subway tunnel drilling and explosion, urban shallow hole blasting, cooling tower blasting demolition and other construction blasting vibration monitoring;
[2] Vibration detection items with fixed observation points, long monitoring period, high frequency or difficult to reach
Such as: adjacent to existing lines, bridges, dams, ancient buildings, high-steep slopes and other engineering construction projects,
[3] Detection items with wide distribution of observation points and many points
Such as: railway passenger transport line, oil pipelines and other lines along the impact of monitoring the vibration of the construction project;
[4] Continuous vibration monitoring induced by other activities
Such as: vibration monitoring induced by activities such as strong smashing, piling, heavy machinery transportation; |
| Example 1: Monitoring of the impact of the blasting operation of Jiahua Cement Yard in Kunming Iron and Steel Group on the pipeline connecting the China-Myanmar oil pipeline
In December 2016, entrusted by China National Petroleum Corporation Southwest Pipeline Co., Ltd., our company undertook the monitoring of the impact of the blasting operation of the Kunhua Jiahua Cement Yard on the adjacent China-Myanmar oil pipeline. As the project is monitored in the field, the pipeline is located on the mountain, which is inconvenient to maintain. The solar power supply system and the L20-N network blasting vibrometer are used for continuous testing.
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Example 2: Monitoring the vibration impact of the drilling and blasting construction vibration of the newly built Huying Xishan tunnel on the existing Liuzhangzi tunnel
In November 2016, commissioned by the Beijing Railway Bureau, our equipment L20-N participated in the vibration detection of the existing Liuzhangzi tunnel in the construction of the newly built Huying Xishan tunnel. Because there is no mobile phone network signal in the existing tunnel, special The 4G signal of the tunnel port is introduced into the measuring point by using the optical fiber, so that the instrument can realize the online function, thereby realizing real-time network monitoring and greatly reducing the monitoring workload.
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Side wall mounting
1. 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. Fix the sensor to the wall with a clamp.
4. Connect the sensor cable, antenna and power supply.
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Platform
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