R-sensors LLC
Bldg. 1, 4, Likhachevsky proezd, Dolgoprudny, 141701, Russia
+7 (498) 744-69-95,
NDAS-N. User Manual.
6
1. Introduction
The NDAS-8426N programmable seismic data logger
(hereinafter referred to as the ‘data logger’
or the ‘device’) is designed for 6-channel digitization of the analog signal, filtration, analysis, storage
and transfer of digital seismic information in continuous mode (real time), upon trigger actuation (trigger
mode) or upon operator's request (manual mode).
The data logger is used to record and transfer seismic signals using analog acceleration sensors
(accelerometers) or velocity sensors (velocimeters, geophones). The data logger is compatible with both
passive type sensors (velocimeters, geophones) and active type sensors (velocimeters, accelerometers).
Owing to the available tools of adapting software and hardware to a specific problem, application of
flexible response algorithms to a detected event, the data logger may also be applied to a wide range of
scientific and industrial applications which cover digitization, accumulation, processing and transfer of
the data on slowly changing analog electrical signals generated from physical process sensors including
gravimeters, barometers, low-frequency microphones, thermocouples and so on via communication
networks or to actuators.
The data logger can be integrated with existing engineering systems such as chains of digital sensors
and actuators, in particular, digital accelerometers, fire security and address alarm sensors, actuating
industrial controllers using modifications of the RS-485 half-duplex communication protocol (LanDrive,
Modbus and others). In addition, the RS-485 half-duplex protocol may be used to connect the external
GPS/GLONASS satellite receiver located away from the data logger.
The data logger can be used as part of:
continuous seismic monitoring systems at stationary and mobile observation points;
engineering geophysics systems, seismic exploration and seismic microzoning;
seismic event early warning systems;
seismometric monitoring systems for building and engineering structures, high-rise buildings,
pipelines, tunnels, bridges;
other engineering and industrial applications.
With highly customizable software based on the open UNIX platform, it is possible to create and
install additional software blocks by the user to expand the data logger’s capabilities. The open software
architecture includes a simple data transfer protocol, access to the device’s hardware functions and
integration with the data logger’s web interface.
The data logger’s additional functions are provided through industry-standard Mini PCI-E expansion
cards with the USB interface (including SSD drives, Wi-Fi and Bluetooth adapters, 3G modems) as well
as external devices with the USB interface (including flash drives, RS-485, CAN, Wi-Fi, Bluetooth
adapters, 3G modems and so on).
The data logger utilizes a unified software platform NDAS-RT with a graphical interface for
managing software and hardware functions, selecting and configuring operating modes, synchronization
modes, translation and saving data, as well as viewing incoming information on the fly. The NDAS-RT
software platform allows building combined data acquisition networks both based on analog seismic
sensors paired with an NDAS-N recorder, and CME-ND digital seismic sensor paired with an NDAS-
RT communication module. The use of the NDAS-RT software platform in different types of devices
makes their user interface and software settings the same type, which reduces user training time and
simplifies device replacement.
