SEISMIC EQUIPMENT
Seismometers, geophones and dataloggers
Innovative molecular-electronic sensors of linear and angular motion and measuring systems
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SEISMIC EQUIPMENT Seismometers, geophones and dataloggers Innovative molecular-electronic sensors of linear and angular motion and measuring systems |
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Autonomous wireless data logger module NDAS-8224.
Autonomous wireless data logger NDAS-8226.
The renewed CME-6211 low noise broadband seismometer.
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TECHNOLOGY NEWS
August 2017: An article by our colleagues.
The Journal of Atmospheric and Oceanic Technology
of the AMERICAN METEOROLOGICAL SOCIETY has published an article
"Low-frequency seismic node based on molecular-electronic transfer sensors for marine and transition zone exploration."
This paper reports on a field-testing of the self-contained seismic station NDAS-8224,
which has a modular structure allowing for operations under different environmental conditions, like onshore,
offshore to 500 meters depth and at transition zones. The station operation frequency
band is 300 Hz, which is wider than that of the majority of seismic stations based on
standard (10 Hz) geophones.
August, 2017: An article is published.
An amazing presentation "APEX
Asteroid Probe Experiment" given at The Small Satellite Conference by our colleagues from
Johns Hopkins University, University of Maryland and Arizona State University describing the possible planting
of a molecular-electronic seismometer on the surface of Apophis asteroid.
The
original presentation's link.
August, 2017: Presenting NDAS data loggers.
The data loggers' product line has been enriched by the products of
the NordLab LLC - an R-sensors and MIPT joint enterprise. The new data loggers
are named NDAS. They exploit the
latest ARM architecture Texas Instruments' controller and a multichannel ADC from Analog
devices. Low power consumption and wireless Wi-Fi interface for setup and
signal quality control are but two distinctive features of NDAS.
A GPS/GloNass combined receiver provides coordinates and clock synchronization.
The current product line is constituted by 4 channel low power autonomous
data logger NDAS-8224 and 6 channel multi-purpose
data logger NDAS-8226. The 12 and 48 channel versions
are under development. The data loggers can be equipped by accelerometer and magnetic compass
which make possible the determination of azimuthal orientation and tilt with respect to
vertical direction, as well as by temperature, pressure and humidity sensors for
checking the working conditions and impermeability in case of a submerged deployment.
All auxiliary information from sensors is available in telemetric transfer from the logger,
as well as it is stored along with the registered signal.
The full compatibility with the R-sensors' seismic sensors was of most importance
during the development of the loggers. Now a joint project of R-sensors and NordLab
for the design of seismographs - a seismic sensors with integrated data logger is undergo.
February 2017: An article by our colleagues.
The journal "IEEE Sensors Journal"
published an article
"Design and Self-Noise of MET Closed-Loop Seismic Accelerometers".
This paper reports on the development of the feedback system for an MET seismic accelerometer,
a feedback stability analysis, and an optimization of the signal conditioning feedback electronics
to get the highest dynamic range. The article is focused on the principles of operation of the
MTSS-1033A seismic accelerometer and contains
the latest comprehensive analysis of the noise generation mechanisms which occur in
molecular-electronic transducers.
February 2017: An article is published.
The The Journal of seismology published
an article "New seismic array solution for earthquake observations
and hydropower plant health monitoring".
Some unique data was aсquired by the rotational seismometer METR-03.
Rotation oscillation sensor is named as a substantial asset, which is installed in conjunction with accelerometer in
the turbine hall, can bring the efficiency of cavitation hazard detection to a new level.
October 2016: Two articles by our colleagues.
The journal "Sensors — Open Access Journal"
published an article
"Molecular Electronic Angular Motion Transducer Broad Band Self-Noise".
And the journal
IEEE SENSORS JOURNAL published
an article "Experimental Studies of Temperature Dependence of Transfer
Function of Molecular Electronic Transducers at High Frequencies".
Both articles were written by our colleagues and are presenting the
latest results of the MET sensors' studies obtained in MIPT laboratories
in 2015 - 2016.
The first article can be downloaded from our site:
July, 2016: The strong motion modification of METR-01.
The modification of the one-component rotational sensor
METR-01 was designed and successfully tested.
The modified sensor has a 1 rad/sec input signal range. To comply with
the output voltage range, the sensitivity was reduced ten times down to 5 V/rad/sec. In order
to do this, an additional thin ceramic paper was placed inside the sensing channel.
Follow the link for a
METR-01LS sensor tests' presentation.
March, 2016: The renewal of Baykal-CME seismic station.
The components of seismic station
Baykal-CME were renewed.
The new DSP of Baykal-8 (BY-8)
seismic station allowed for recording the same signal at different sample rates simultaneously.
The recording of signal with reduced sampling permits a quick amplitude analysis to be
performed on a long-term recording, which is highly demanded by seismologists. Apart from
this, the output for applying periodical test signals to sensors was introduced.
The modification of seismic sensor CME-6211
allowed for wide power supply options to be offered, namely from +5 to +36V DC, which
were earlier available only for CME-6111
seismic sensor. Besides, the self calibration circuits were modified so the response
curves for all three channels can be obtained. The circuits were optimized for interaction
with Baykal-8 seismic recorder.
March, 2016: A book has been published.
Springer Publishing House published
a second edition of the book
Instrumentation in Earthquake Seismology. The chapter "Some New Trends in Seismic Sensors" contains
a description of modern electrochemical transducers of linear and angular motion.
The CME-6211 - a top model among the seismometers produced by R-sensors is listed in the summary table
"Overview of some active sensors available on the market".
The Preliminary version of the first edition, June 2002, is available at the
link.
March, 2016: A book has been published.
Springer Publishing House published
a second edition of the book
Instrumentation in Earthquake Seismology. The chapter "Some New Trends in Seismic Sensors" contains
a description of modern electrochemical transducers of linear and angular motion.
The CME-6211 - a top model among the seismometers produced by R-sensors is listed in the summary table
"Overview of some active sensors available on the market".
The Preliminary version of the first edition, June 2002, is available at the
link.
December, 2015: An article by our colleagues.
A paper "Low-noise Linear and
Angular Motion Sensors for Vibration Monitoring" was presented in the
Third International Conference on Advances in Civil, Structural and Construction
Engineering - CSCE 2015 held by The Institute
of Research Engineers and Doctors in Rome, Italy.
This article reviews on the development of a new category motion sensors for vibration
monitoring including linear and angular accelerometers based on molecular electronic
transducer (MET) technology.
November, 2015: A book has been published.
Encyclopedia of Earthquake Engineering has been published and is available on
SpringerLink with an article by our colleagues
Electrochemical Seismometers of Linear and Angular Motion .
This article is a complete description of the state-of the art in the electrochemical
motion sensors. It covers all related aspects - electrochemical basics, mechanical features
of different types of sensors, signal amplification and introducing a force-feedback
into the system. The work also includes an overview and comparison tables of modern
commercial seismometers, compact seismic sensors - both accelerometers and geophones
along with a unique family of rotational electrochemical sensors.
August, 2015: The production of OEM sensing modules.
R-sensors have launched the production of sensing modules for third party seismic
systems. The three component sensing modules designed for installation into an external
protective case can be based on a broadband seismometer CME-4211
or on a high-sensitive geophone MTSS-2003.
These modules provide a cost-effective solution for customized digital seismic stations
and can be used with most analog-to-digital converters. The circuitry enables self-calibration
by means of an external DAC for MTSS-2003 or self-testing for CME-4211. The parameters of
the modules are similar to those of conventional sensors. The sensing modules based
on a seismic accelerometer MTSS-1043A
are also available.
December, 2014: An article by our colleagues.
The "Sensors — Open Access Journal"
published on the 26th of December, 2014 an article
A Low-Noise DC Seismic Accelerometer Based on a Combination of MET/MEMS Sensors .
The article explores a possible approach to the construction of a hybrid seismic accelerometer
combining the superb performance of a MET sensor in the middle and high frequency range with a
conventional on chip MEMS accelerometer covering the lower frequencies and gravity.
Apart from R-sensors, our colleagues from CME and NordLab LLC contributed to this
article. The described principles give the basis for a construction of a new commercial
DC seismic accelerometer.
The local copy of the article is available on our site:
April, 2014: A new СМЕ-6111 seismometer.
The newly designed version of СМЕ-6111
force feedback seismometer has been introduced.
Among the advantages to say but two are wide input voltage range
( 9-36 V DC, isolated) as well as the operability from low voltage power source (single +5 V DC or
dual ± 5 V DC non-isolated).
February, 2014 Redesigned compact size sensing element.
Testing of a renewed compact size sensing element for MTSS-1033A accelerometer
has been finished.
The newly designed sensing element has smaller size, higher frequency cut-off and
wider dynamic range. The redesigned MTSS-1033A accelerometer has also been
successfully tested and is currently ready for production.
June, 2014: Renovation of the СМЕ/Baykal seismic station.
The test on a redesigned CME/Baykal seismic station
consisting of a seismometer CME-4311/CME-6011 and a seismic recorder Baykal-8
has been successfully finished.
October, 2013: Low power version of СМЕ-6011.
A low power version for the СМЕ-6011 has
been designed. The typical current consumption for the sensor is 10 mA.
April, 2013: An article by our colleagues.
A "Sensors — Open Access Journal" has
published on 8 April 2013 a comprehensive review on modern state of
Molecular Electric Transducers as Motion Sensors .
This article contains theoretical part of transducing motion to a current flow, overview
of up-to-date sensors techniques as well as perspectives of rotational sensors application.
The article contributed by our colleague Dr. Vadim Agafonov. The local copy of
the article is available on our site:
February, 2013: The renovation of the 4011/4111 sensor family.
The CME-4011 & CME-4111 models, known as the first sensors based on MET-technology,
have been produced by our company since it's establishing. From this time on, the construction has
been optimised and revised for several times. By now we have acquired a considerable experience
of using these models especially under severe field conditions. The newly designed devices
named CME-4211 and CME-4311 are thoroughly re-designed versions of CME-4011 & CME-4111
respectively. During 2012, both families were produced at the same time, and from
2013 the new models will replace the old ones entirely.
Along with improving durability, changes were made in vertical channel and output filters.
The new CME-4211 and CME-4311 families feature drastically more stable newly designed
vertical transducer with force feedback. Output filters have 2nd order low-frequency slope lowering the
DC drift and shortening settling time after power on. Besides, the input power supply range has been
extended to 10.5 - 30 VDC. The case design and output connectors remain as in previous models. The
renewed low-power versions are also available.
July, 2012: A brand new СМЕ-6011 seismometer.
The engineering department of our company
has developed a new broadband seismometer СМЕ-6011 .
The instrument has passed comprehensive testing studies and soon will be ready for serial production.
The seismometer extends the family of high sensitive broadband force feedback seismometers started
by CME-6211, having but lighter weight and being more adapted for field conditions. The amplification
stages anf supply curcuitry have been significanly modified, which resulted in improving overall
characteristics of the sensor.
March, 2012: An article is published.
The Journal of seismology puplished an article "Rotational sensors —
a comparison of different sensor types". The article decribes the parameters of three different
rotational type sensors, including molecular-electronic ones.
May, 2011: Tests of the MTSS-1033A accelerometer.
The seismic accelerometer MTSS-1033A has been tested at the
Institute of Geosphere Dynamics
of Russian Academy of Sciences (IDG RAS) and at the
National Metrological Institute of Russia (VNIIFTRI).
The characteristics of the accelerometer have been confirmed on the certified shake table.
January, 2011: A newly designed shake table has been set in operation.
A new wide dynamic range shake table has been set in operation at R-sensors facility.
The newly designed shake table is intended for high precision seismic sensors calibration
within 0.001 to 300Hz frequency range.
The instrument has enriched the calibration means which are in use by R-sensors for tests and
adjustment of linear and rotational seismic sensors.
2010: The Baykal seismic station.
A new portable autonomous seismic station CME/Baykal based on broadband molecular-electronic
seismometers CME-4111/CME-6211 and self-contained high-resolution digital recorders Baykal-7HR/Baykal-ACN
have been tested and now ready for sale.
The CME/Baykal seismic stations are currently in use by oil exploration companies
and geophysical research institutes in severe field conditions in Siberia and in the Arctic regions.
November, 2009: A new combined gyro sensor.
A low-noise subminiature angular rate sensor MTRS-614A has been developed on the base of
the molecular-electroniс rotational microsensor.
The latest development of molecular-electronic technologies gave rise to the ultra small and lightweight yaw rate sensor,
comparable with the microelectromechanical gyros in size, weight and power consumption.
Unlike the MEMS gyros, the new MET sensor is characterized by a significantly higher sensitivity and very low intrinsic noise level.
However, the bandwidth of this sensor is limited in low frequencies by a value of ~0.02 Hz due to the physical operating principles.
In MTRS-614A, the signal from the MET sensor is complemented by the low-frequency component of the ADXRS614
(Analog Devices MEMS gyro) signal.
This solution allows to extend the range of application to zero frequency maintaining extremely low noise
of molecular electronic sensors.
September, 2009: High rise building vibrations studies.
Studies of the seismic vibrations of a 44-storeyed building using the commercially available angular velocity
sensors METR-03 have been carried out.
The presence of a rotational vibration mode, that prevoiusly was beyond registration by means of linear sensors -
the rotational vibration at 0.7Hz around the vertical axis in particular, has been established.
September, 2009: Limbs motion parameters sensors.
A prototype of the device for measuring the motion parameters of a moving man's body and his lower extremities
has been developed and successfully tested. The development is made on the base of the very compact molecular-electronic
sensors of the linear and rotational motion. The application fields of the development are: sports medicine, orthopedics.
The patent for the development is obtained.
The development is made under supporting of The Russian Federal Agency for Science and Innovations
(www.fasi.gov.ru ).
May, 2009: An article is published.
The "Journal of Seismology"
published an article "Seismicity at the convergent
plate boundary offshore Crete, Greece, observed by an amphibian network". The
data were retrieved by means of Ocean-bottom seismometers CME-4111-OBS.
May, 2009: A prototype of the Nord seeking device.
A prototype of the North seeking device, a geographic north direction seeker, based on the rotational
molecular-electronic sensors has been developed and tested in cooperation with The Center for Molecular
Electronics (MIPT, Moscow, Russia). The precision of the azimuth detection for the newly developed device
is better than 0.1°·sec(φ).
The device is insensitive to magnetic fields, has very compact size, low consumption and cost.
It can be used in high-precision autonomous portable navigation systems. This development may have a significant
potential as an advantageous alternative to the gyro-compass systems.
2009: An updated case design for CME-4111/4011 seismometers.
An improved external case for the compact broadband seismometers CME-4111/4011 has been developed.
The case is equipped with adjusted legs, a bubble level for precise leveling, a handle for carrying
and a bayonet connector for faster cable connection.
The seismometers CME-4111, 4011, 3111, 3011 can now be supplied with this optional
external case instead of a standard simplified case.
December, 2008: An article is published.
The "Bulletin of the Seismological Society of America"
published an article "A Comparison of Sea-Floor and On-Land Seismic
Ambient Noise in the Campi Flegrei Caldera, Southern Italy". The data were retrieved by means of
Ocean-bottom seismometers CME-4011-OBS.
2008: A unique six components sensor.
A high-performance 6-component velocimeter has been developed.
The device has 3 linear and 3 rotational sensitivity axes.
The possible applications of the sensor lie in engineering geophysics, exploration seismology, industrial
vibration monitoring, seismic monitoring of the high-rise buildings and various constructions.
The standard passband of the sensor is 0.5-100 Hz.
August, 2007: A new prototype of the Area protection system.
The prototype of an intrusion protection system based on compact-size molecular-electronic
seismic sensors has been developed.
The system successfully passed the field tests in detecting the steps of a walker.
The prototype detects a moving man from a 50-100 meters distance (depending on the type of the soil),
as well as locates the direction towards the moving person with high precision.
The system offers a cost-effective solution for the area security applications.
July, 2007: An article is published.
A special issue of Measurement Science and Technology
published an article "Vibration diagnostics
instrumentation for ILC". The article describes the possible solutions for vibration control
of the e-e+ 500 GeV International Linear Collider. The sensors should be able to operate under
the unprecedently strong magnetic fields. Molecular electronic sensors are listed among other possible
options.
January, 2006: An article is published.
The Institute of Navigation
published an article "Small, Low-Power, Low-Cost sensors for
Personal Navigation and Stabilization Systems". The article describes the current progress
in development the molecular electronic sensors and their possible applications in navigation.
The rotational type of sensors was mentioned as well.
September, 2004: An article by our colleagues.
Phys.Org site published
an article "Tablet-Size Seismometer"
about the founder of the
Center for Molecular Electronics of MIPT Dr. V.A. Kozlov and the prospects of a brand new
molecular-electronic seismic sensors.
1999: An article by our colleagues.
The Seismic instruments journal
published an article "The development
of seismic sensors based on novel priciples (molecular electronics)" (in Russian).
The article describes the hystory, the principles of operation and contains the detailed
description of the CME-4011 seismometer.
October, 1995: Two articles by our colleagues.
The Seismological research letters -
a journal of Seismological Society of America published two abstracts
"Broadband molecular electronic
seismometers" and "Rocking platform for wide band calibration of seismometers".
These are the abstracts of the summary reports to the Eastern Section Meeting of
the Seismological Society of America. The reports show the up-to-date progress in development
of the molecular electronic seismometers and the means of their calibration.
Spring, 1993: An article is published.
The IRIS Newsletters published
an article "A Volksseismometer ?" by Guust Nolet
of Priceton University which refers to the 'first prototypes of a molecular seismometer' presented by
PMD Engineering in collaboration with the Institute of Physics of the Earth in Moscow.
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March 18, 2024
The hosting of the main site is currently being changed. You can still contact us by phones on the Contacts page or by e-mail at r-sensors@mail.ru September 2-7, 2018
R-sensors will represent new products: a broadband digital seismometer, a digital data logger as well as a self-contained wireless seismic station for the transition land-sea zones. We pleasantly welcome you at our booth #3! May 8-10, 2018
April 23-27, 2018
December, 2017 The Seismic Instruments published an article by our colleagues from Schmidt Institute of Physics of the Earth on the application of our seismometers in the passive seismic prospecting.
Presenting our partner:
Arman Fanavaran Zamin Co. November 5-9, 2017
August, 2017 The "Journal of Atmospheric and Oceanic Technology" published an article by our colleagues "Low-frequency seismic node based on molecular-electronic transfer sensors for marine and transition zone exploration".
August, 2017
Presenting brand-new wireless data loggers NDAS from R-sensors Group. |
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"R-sensors" LLC 8A Zhukovskogo St., Dolgoprudny, Moscow region, 141701, Russia tel./fax: +7-499-707-7657,+7-498-744-6995 web: www.r-sensors.ru, e-mail: r-sensors@mail.ru
(с) 2018, R-sensors LLC
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