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Seismic survey

microtremor

microtremor array measurement
and vibration monitoring.

　
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McSEIS-MT NEO

Data logger for microtremor array

McSIES-MT NEO is the data acquisition station with the 3-component-accelerometer sensor and GPS clock receiver having the function of continuous recording and time synchronization for microtremor array measurement and vibration monitoring.
McSEIS-MT NEO does not require any artificial seismic source such as hammering or weight dropping but acquire vibration propagated in the surface of ground, that is surface wave, generated by traffic noises and industrial vibration, natural phenomena such as ocean waves at seashore and winds, then analyze its phase velocity to produce
S-wave velocity structure of the ground.
The investigation from several ten meters to several thousand meters is possible by the triangle microtremor array with four (4) McSEIS-MT NEO or more.

This McSEIS-MT NEO is also used for the study of vibration characteristics of the ground and structures.

● Four (4) units of McSEIS-MT NEO allow Vs measurement with triangle array for a different depth.

● The measurement is possible without using artificial seismic source at noisy sites where the human
　activity is overcrowded.

● The Vs structural survey is possible for the depth of several ten meters to several thousand meters.

● Uploading of measurement parameters from the SD memory card makes it possible to start recording
　without any difficulties.

● GPS clock in each station allows synchronizing all recordings.

● The data processing software for microtremor array measurement is available.

■	System components

	System components	Main station (All-in-one) + Application Software Main station is including 3D sensor, function of data acquisition, GPS module, I/F Connector for data communication, Internal battery, Application Software works in Note PC Data processing, Interchange data format Making setting file of the Main station

■	Sensor
	3 Servo-Accelerometers
	Resolution Sensitivity Range	：1μG ：1.9V/G : ：+/-4G

■	Data Acquisition

	Number of channel Input Impedance Maximum input Signal voltage Frequency Response A/D Converter Sample Time 　 Data Recoding Mode Data Record Length Data Media Data Format I/F Operation Setting	：Selectable (Internal 3ch, External 3ch) ：1MΩ (Typical) ：+/-5V (Set up at internal amplifier ×1, 1/2 attenuator) ：0.1 – 200Hz ：32bits (S/N ratio on 130db 250sps, 127db 500sps) ：4, 8, 16, 32msec (LPF 103Hz Fixed) ：2, 4, 10, 20, 50msec (LPF 206Hz Fixed) ：Continuous Mode, Time Mode ：10 hours (max) ：SD memory Card 2GB, SDHC memory Card 2GB, 4GB, 8GB, 16GB ：Binary in the internal memory. ：USB port ×1、RS232C port ×1, SD memory Card I/F ：Display, Keypad ：Uploading a setting file in a SD memory card.

■	System Case

	Level adjustment Size Weight Case protection	：Bubble level adjustment by locking leveling feet ：220mm(W) ×245mm(D) ×250mm (H) ：7.5kg (Including internal battery) ：dustproof, defend water　(IP43

■	System

	Power source Power consumption Temperature Humidity	：Internal Battery +12V, 7.2Ah External (DC +19V to 20V) ：600mW (Without wireless module) , 1270mW(With wireless module) ：-20 to 55 degree C (operating) ：10 to 90 % (operating)

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	E-mail ：seihin@oyo.jp