Seismometers

Miniseis 24A/48A Integrated Seismograph

( Overview

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The Miniseis 24A/48A Integrated Seismograph is an integrated seismic surveying system with built-in lithium ion battery and 24A/48A high precision data channels. The built-in high performance computer is used for data collecting and processing while still retaining all the capabilities of a personal computer. The Miniseis 24A/48A Integrated Engineering Surveying Equipment uses ΔΣ24 bit high precision, high speed analog to digital converters, and can operate with sampling periods as low as 25 microseconds and dynamic range of 131 dB.

At 4.5 kg, the Miniseis 24A/48A is portable, has an easy to use fully Chinese user interface, can be widely used in areas such as engineering geological surveying, dike surveying, and geological investigations, and is at present the world's smallest engineering seismic surveying equipment.

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( Main Function

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1. Shallow reflected wave surveying
2. Shallow refracted wave surveying
3. Transient Rayleigh wave surveying
4. Wave speed testing
5. Microtremor testing
6. Pile foundation small strain integrity testing
7. Elastic wave CT (computed tomography)
8. Seismic imaging
9. Parametric testing of foundation forces
 
 

( Main Features

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1. Built-in lithium ion battery with 8 hour battery life
2. Light and portable (central unit weighs 4.5 kg)
3. Built-in scroll wheel for ease of data viewing
4. Contains all shallow seismic surveying functionality
5. Windows 2000 operating system
6. Chinese user interface
7. water-tight keyboard and mouse buttons
8. 2 standard USB ports
9. Signal edge trigger, TTL trigger synchronization
 
 

( Pictures

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( Technical Specifications

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Acquisition System:
Number of Channels: 24/48
Sampling Rate: 25 us - 10 ms, mode selectable
Bandwidth: 0.1 Hz - 5000 Hz
Programmable Analog Filter  
High pass filter: 10-200 Hz programmable
Low pass filter: 500-2000 Hz programmable
Band stop filter: 50/60Hz
A/D (IFP) precision: ΔΣ24bit
Computational precision: 32 bit
Equivalent noise: 1uV, RFI (at 2.0ms sampling rate)
Cross-channel interference: >80 dB
harmonic distortion: -114 dB (at 2.0ms sampling rate)
Data Display and Recording:
Main processor: Intel Pentium 500 MHz processor
RAM: 118 MB
Internal hard drive: 10GB
Monitor: 1024×512 8" SVGA
Data transfer: USB
Data storage: SEG2, SEGY, and GeoPen data format
System diagnostics criteria:
static noise cross-channel consistency cross-channel isolation
Main unit size and weight:
size: 330×180×100 mm
weight: 4.5 Kg
environmental tolerances:
operating temperature: -20℃ ~ +50℃
storage temperature: -40℃ ~ +70℃
operating humidity:: 0~95%
 
 
Seismic Data Acquisition Software:
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Software Features
Data acquisition of shallow-depth reflected wave surveying, shallow-depth refracted wave surveying, transient Rayleigh wave surveying, seismic layer imaging, and foundation dynamics parameter testing.

Software Features
Fully Chinese interface; real-time on-site static noise monitoring; multiple Rolling Acquisition and data superposition functionality; measure nodes for geophone resistance; gains of each channel adjustable in real-time; arbitrary usage of data acquisition channels.



System Diagnostics Software:
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Software Functionality
static noise, cross-channel consistency, cross-channel isolation

Software Features
Fully Chinese interface; Diagnostics data stored separately; automatic display of diagnostics results; diagnostics results saved as text or Excel format on hard drive.



microtremor data acquisition software/ wave speed (P and S wave testing) data acquisition software/ single channel equal offset seismic reflection data acquisition software:
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microtremor data acquisition software features:
Fully Chinese interface; real-time frequency spectrum display; data storage format supports SEG2, SEGY

wave speed (P and S wave testing) data acquisition software features:
Dual wave overlay display useful for identifying S waves; data storage format supports SEG2, SEGY; orthogonal wave superpositioning.

seismic reflection data acquisition software features:
Fully Chinese interface; real-time static noise monitoring; supports single or multiple channels; one-click data acquisition; one-click recording; manual orthogonal superpositioning and automatic superpositioning.

 
 

( Expandable Peripherals

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24 channels expandable to 48 channels:
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1. number of acquisition channels increases from 24 to 48, doubling data collecting rate.
2. uses built-in "rolling technique" for extremely simple seismic refraction data acquisition
3. channels 1-48 can be arbitrarily set, allowing for multiple ways to use the system
4. the world's smallest 48-channel full-functionality seismic instrument to date.


random spike seismic emitter and man-made seismic emitter:
1. companion random impulse seismic emitter and man-made seismic emitter
2. can use impulse signal to conduct time-shift for superpositioning
3. can use relevant filter to conduct real-time superpositioning
4. includes real-time data amelioration for greatly increased robustness against noise.
5. includes all methodologies for shallow layer seismic surveying
6. includes built-in "rolling switch" functionality for simultaneous operation of multiple-region refracted wave surveying



BS600 Mechanical Seismic Impulse Emitter primary technical specifications:
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Seismic Impulse Emitter real-time superpositioning and data acquisition software:
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software functions
this software is used for random seismic impulse real-time superpositioning and data acquisition. Uses man-made seismic waves to conduct reflection wave and shallow-layer refraction wave 4-wave surveying.
Relevant channels can use any data recording channel, or can use dedicated instruments, freeing up the device's recording channels.

Software features
real-time on-site static noise monitoring; measuring nodes for geophone resistance ; real-time adjustment of data, data format in SEG2、SEGY



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◆using a mechanical seismic emitter to collect data. emitter has poor stochastic characteristics, appearance of correlated noise data recorded during period where emitter shows good stochastic characteristics
(superpositioned 10 times, gain of -60 dB) (observation system as above, recording time 16s, display gain -90dB) system as above, recording time 16s, display gain -90dB)


 
 
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seismic cables surface wave cables sensors microtremor probe
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electric spark seismic emitter downhole sensor series wave speed probe
 
 

( Suggested Components

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Suggested Components (24 channel):
IndexProduct NameModelAmount
1Main station (24 channel)Miniseis241
2AC power supply adapterAC-M241个
3Trigger plugTG-11
4Trigger switchHS-12
5Equipment caseBY-11
6Explosive coordinator unit 1
7Seismic cables (5m separation)ASC-12-52
8Surface wave cables (2m separation)ASC-12-21
9Seismic sensor(60Hz)PS-60A24
10Surface wave sensor(4.5Hz)PS-4.5B12
11Transient surface wave processing softwareGEORWA4.01
12Shallow-depth refection wave processing softwareGPSEIS1
13Microtremor testing equipment and softwareGEOPULSATE1
14Wave speed testing equipment and softwareGEOPILE1
15Pile foundation testing equipment and softwareGEOPILE1
16Single channel equal offset seismic reflection testing equipment and softwareGEOPULSATE1
17Accessory caseBB-12
Miniseis24 Seismic Instrument Additional Component List:
IndexProduct NameModelAmount
1Seismic cables(10m)ASC-12-102
2Seismic Sensor (100 Hz)PS-100A24
3Random Seismic Data Expansion ModuleEX-R1
4Random Seismic Emitter德国威克1
524 to 48channel upgrade moduleEX-241
6Remote explosive unitBOMTEX 21
7Electric Spark Seismic Emitter (2000 J)PS-100A1
8Downhole CT sensor series (12 channels, 2m separation between channels)CTC-12-21
9Seismic CT processing software 1
suggested components (48 channel):
IndexProduct NameModelAmount
1Main station (48 channel)Miniseis481
2AC power supply adapterAC-M481
3Trigger plugTG-11
4Trigger switchHS-12
5Equipment caseBY-11
6Explosive unit 1
7Seismic cables (10m channel separation, 50 pin plug)ASC-24-10A4
8Surface wave cables (2m separation)ASC-24-22
9Seismic sensor(60Hz)PS-60A48
10Surface wave sensor(4.5Hz)PS-4.5B24
11Transient surface wave processing softwareGEORWA4.01
12Shallow-depth refection wave processing softwareGPSEIS1
13Accessory caseBB-14
Additional Components:
IndexProduct NameModelAmount
1Microtremor testing equipment and softwareGEOPULSATE1
2Wave speed testing equipment and softwareGEOVEL1
3Pile foundation testing equipment and softwareGEOPILE1
4Seismic imaging testing equipment and softwareGEOPULSATE1
5Seismic cable (5m separation, 50 pin plug)ASC-24-52
6Random Seismic Data Expansion ModuleEX-R1
7Random Seismic Emitter德国威克1
8Remote explosive unitBOMTEX 21
9Electric Spark Seismic Emitter (2000 J)PS-100A1
10Seismic Sensor (100 Hz)PS-100A48
11Downhole CT sensor series (12 channels, 2m separation between channels)CTC-12-21
12Seismic CT processing software 1