Seismometers

SE2404NTn Remote Seismic Data Acquisition System

( Overview

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The SE2404NTN Seismic Data Acquisition Systemis a portable wired telemetry seismic data acquisition system. This system uses advanced networking technology for distributed real-time data acquisition and display. The system is composed of the SE2404NTN main control unit, a data acquisition station (RSU), a central hub (CSU), digital transmission composite cables, and remote detonation decoder. It can be widely applied wherever high precision two or three dimensional seismic surveying is required, such as surveying for engineering, coal, minerals, and/or hydroelectric power.

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( Main Function

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1. Using networking and control technology, the system can be extended with up to 2048 sensor modules.
2. The main control unit is equipped with two data transmission ports and built-in remote detonation encoder.
3. Real time data display, storage, and playback.
4. Data acquisition modules use true 24 bit high precision analog to digital converters and non-addressed linking technique, and have large dynamic ranges, low power consumption, and are easy to use.
5. Data acquisition modules each has 12 channels, a water-proof cast-aluminum shell, and are small, lightweight and easy to maintain.
6. The central hub has a 10Mbps transmission speed and can support up to 256 modules, and is small, lightweight and easy to maintain.
7. The transmission range between the remote control encoder and decoder is 10 km on open ground. The system uses protocol-based security to raise its reliability and safety. The design includes two high precision auxiliary channels.
8. The system is developed using Windows, field usage is simple and quick. The system is designed for both oil surveying seismic technology and engineering seismic surveying.
 
 

(Pictures

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(Technical Specifications

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Main Control Unit (SE2404NTn): Windows 7 operating system Intel (R) Atom (TM) CPU N570 1.66GHz, 1.67GHz RAM 2.00 GB 250 GB HD 12 inch, 1366x768
Data flow ports: 1 (10 Mbps)
Built-in remote detonation encoder: 433-435 MHz, 1W, 8 channels
Built-in timing GPS (optional): 15 meter positional accuracy, 0.5 microsecond timing accuracy
Built-in auxiliary channel: time break and reference channels
Printer and tape drives (optional): PC compatible USB printer and tape drive
Control software: Monitoring system, Seismic data acquisition, data quality control, Real-time noise monitoring, data display and recording
Acquisition Unit
A/D Converter: △Σ24bit
Localisation: automatic self-localisation
Data filtering: linear filter
Number of channels: 12
Sampling frequency: 0.025 - 10 ms (selectable)
Longest length: 31 kB/channel
Frequency response range: 1-1500Hz
Cross-channel suppression: <-100dB
Dynamic range: 120dB
Harmonic distortion: -114 dB
Largest input signal: 1.6 Vrms
Noise level: <1 μVrms
Power usage: 2.5 W / unit
Operating temperature: -40 to 80 degrees C
Storage temperature: -40 to 70 degrees C
Weight: 1.6Kg
Size: 200×90×180 mm
Power source: built-in lithium battery, 18 hours battery life
Hub
Transmission Rate: 4Mbps
max number of stations: 256
size: 250×100×200 mm
weight: 2.0Kg
power supply: built-in lithium battery (18h operation time)
digital transmission cable
pins: 16
max number of channels: 12
transmission rate: 4Mbps
cable diameter: 7mm
weight: 5Kg / 100m
plug: 16 pin, water-tight high-speed plug
Remote Detonator Decoder
Remote control distance: 2 km (open ground)
Frequency range: 433 - 435 MHz / 1 W / 8 channels
Timing GPS (optional): 15 meter positional accuracy, 0.5 microsecond timing accuracy
Detonation voltage: 500V
Detonation interval: 20S
Trigger error: <100 microseconds
Trigger error calibration: time break and reference channels
Battery life on standby mode: 36 hours
Operating temperature: -40 to 80 degrees C
Storage temperature: -40 to 70 degrees C
 
 

 

monthly check-up maintenance software:
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software function

static noise monitoring; cross-channel consistency; cross-channel isolation

Software features

independent storage of test data, automatic display of test results, test results stored in hard drive (supports Excel format)




daily check maintenance system:
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system function

acquisition station impulse test; sensor impulse test; environmental noise level test

software features

independent test data storage; automatic display of test results; test results saved in hard disk (supports Excel format)




2D monitoring system design software:
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software function

2D seismic surveying design; monitoring of seismic data; automatic generation of log reports. Excel format.

software features

supports central-positioned explosives, end-positioned observer systems. All parameters support fast manual input and independent adjustment




2D seismic data acquisition software/ 3D seismic monitoring system design and data acquisition software/ 3D seismic data acquisition software
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2D seismic data acquisition software: 3D seismic monitoring system design and data acquisition software: 3D seismic data acquisition software:

2D seismic data acquisition software - software features

real-time monitoring of environmental noise; real-time monitoring of acquisition stations and central hub; receiver resistance testing (for cable testing); automatic saving and display of seismic data; arbitrary data ordering

software features

supports multiple explosives units in one work-site; data saved in SEG2, SEGY format



3D seismic monitoring system design and data acquisition software - software function

design 3D seismic monitoring system



3D seismic data acquisition software - software function

3D seismic surveying data acquisition software used for saving and handling of 3D seismic surveying monitoring system documents and test data. has real-time environment noise monitoring. automatic storage of data.

software features

can choose any arbitrary ordering of inputs to undergo data acquisition. supports multiple remote explosives units in one worksite. data format supports SEG2 and SEGY.


 

 
 

(worksite layout

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2D layout (no central hub)



2D layout (with central hub)



3D layout
 
 

(Suggested Components

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SE2404NTn Seismograph Recommended Setup:
Index Product Name Identifier Qty
1 Main Unit SE2404NTN 1
2 Acquisition Stations(12ch/stn) RSU-2 10
3 Central Hub(supports up to 256 stations) CUS256 1
4 Remote explosives unit BOMTEX 2 1
5 Main Unit/ explosives unit chargers DC-M/B-1 2
6 Acquisition station/ central hub chargers DC-R/C-1 11
7 Equipment case BY-2 4
8 Digital seismic cable(12m) DSC-12 11
9 Main connector cable(100m) DSMC-100 1
10 Central hub connector cable DCCL-1 1
11 Trigger plug TG-1 1
12 Trigger switch HS-1 2
13 Sensor 60Hz PS-60A 150
14 Remote telemetry seismic 2D acquisition software 1
15 Remote telemetry seismic monitoring system software 1
16 Accessory case 8
SE2404NTn Seismograph - Other Peripherals:
Index Product Name Identifier Qty
1 Remote telemetry seismic 3D acquisition software 1
2 Digital seismic cable(10m) DSC-10 11
3 Digital seismic cable(15m) DSC-15 11
4 Digital seismic cable(22m) DSC-22 11
5 Sensor 100Hz(single) PS-100A 150
6 Sensor 60Hz/100Hz(3S) PS-60A/100A 150
7 Sensor 60Hz/100Hz(3S2P) PS-60A/100A 150
8 Sensor 60Hz/100Hz(3S3P) PS-60A/100A 150