ГЭТ 159-2011 (НИО 253)
Standard name:
- ГЭТ 159-2011 State primary special standard of units of length, velocity, acceleration and plane angle for seismometry in the frequency range of 0.001...30 Hz
Type of measurement:
- Measurements of mechanical quantities
Structural division: name НИО\НИЛ:
- Research Department of Standards in the Fields of Measurement of Motion Parameters, Torque, Force and Gravimetry
Guardian Scientist:
- Yankovsky Alexander Anatolyevich
Year of creation:
- 1997
Year of re-confirmation:
- 2012
Operating principle:
- The USV-2 vertical seismometer reproduces units of length, velocity, and acceleration in the vertical direction using the linear vertical displacement method;
- The USG-3M horizontal seismometer reproduces units of length, velocity, and acceleration in the horizontal direction and the unit of plane angle using the methods of tilting the measuring instruments in the Earth's gravitational field and the method of linear horizontal displacement;
- The USG-G horizontal gravity seismometer reproduces units of length, velocity, and acceleration in the horizontal direction and the unit of plane angle using the dynamic gravitational field method.
Composition of the standard:
- Ustanovka seysmometricheskaya vertikal'naya USV-2, zav. № 01;
- Ustanovka seysmometricheskaya gorizontal'naya USG-3M, zav. № 01;
- Ustanovka seysmometricheskaya gorizontal'naya gravitatsionnaya USG-G, zav. № 01; komplekt komparatorov:
- Preobrazovatel' diffuzionnyy gorizontal'nyy seysmicheskiy PDGS-18 zav. № 5, 7;
- Preobrazovatel' diffuzionnyy vertikal'nyy seysmicheskiy PDVS-9 zav. № 1, 9;
- Akselerometr Bryul' i K'yer model' 8306 zav. № 1195920;
- Seysmometr v sostave: shirokopolosnyy trekhkomponentnyy akselerometr s analogovym vykhodom DS.431410.520 (CMG-5TC), zav.№ T5KZ7, registrator seysmicheskikh signalov «Baykal», zav.№ 00CB001B/
- USV-2 vertical seismometric unit, serial number 01;
- USG-3M horizontal seismometric unit, serial number 01;
- USG-G horizontal gravity seismometric unit, serial number 01; set of comparators:
- PDGS-18 horizontal seismic diffusion transducer, serial numbers 5, 7;
- PDVS-9 vertical seismic diffusion transducer, serial numbers 1, 9;
- Brüel & Kjaer accelerometer model 8306, serial number 1195920;
- Seismometer consisting of: broadband three-component accelerometer with analog output DS.431410.520 (CMG-5TC), serial number T5KZ7, seismic signal recorder "Baikal", serial number 00CB001B/
Main metrological characteristics
| Name of unit |
Range | Error | Uncertainty | ||||
|---|---|---|---|---|---|---|---|
| S 0 | q 0 | u 0A | u 0B | u 0С | U 0 | ||
| Length | 5·10-7 — 1·10-2 m | 0,1 – 0,2 % | 0,2 – 10 % | 0,1 – 0,2 % | 0,1 – 5 % | 0,1 – 5 % | 0,2 – 10 % |
| Speed | 1·10-7 — 1 m/s | 0,1 – 0,2 % | 0,2 – 10 % | 0,1 – 0,2 % | 0,1 – 5 % | 0,1 – 5 % | 0,2 – 10 % |
| Acceleration | 5·10-9 — 10 m/s2 | 0,1 – 0,2 % | 0,2 – 10 % | 0,1 – 0,2 % | 0,1 – 5 % | 0,1 – 5 % | 0,2 – 10 % |
| Flat angle | 2,5·10-10 — 1·10-3 rad | 0,1 – 0,2 % | 0,2 – 4 % | 0,1 – 0,2 % | 0,1 – 2 % | 0,1 – 2 % | 0,2 – 4 % |
Verification diagram:
- Heads the state verification scheme for measuring instruments of length, velocity, acceleration and plane angle for seismometry
Scope of application:
Seismometry, including:
- Measurements of the power of remote seismic sources, including nuclear explosions;
- Research into the Earth's internal structure and earthquake prediction;
- Prevention and mitigation of damage caused by earthquakes and accompanying phenomena;
- Environmental monitoring;
- Seismic zoning and earthquake-resistant construction;
- Seismic exploration of mineral resources.
Results of applying the standard:
- Transferring units to working standards and high-precision measuring instruments in accordance with the verification scheme;
- Ensuring the functioning of seismic monitoring systems for hazardous facilities, primarily nuclear power plants, dams, etc.;
- Ensuring seismic monitoring at locations of high-precision mechanical, microelectronics, and optical manufacturing facilities.
The total number of measuring instruments traceable to ГЭТ 159-2011:
Tens of thousands
Ensuring the uniformity of measurements, participation in the CIPM MRA program:
No comparisons were conducted
Unique technical installations as part of the standard:
The USG-G horizontal gravity seismometer installation has no analogues worldwide
The setup reproduces units using a fundamentally new method—the dynamic gravitational field method. Its essence lies in the effect of a gravitational field source (GFS) on a stationary measuring instrument under study. The proposed GFS design provides a uniform, flat gravitational field with a specified strength in a given spatial region. This makes it possible to determine the field's effect on measuring instruments with any sensing element configuration. Rotation of the source ensures the reproduction of variable linear acceleration along a given direction at the rotation frequency. The amplitude of the reproduced acceleration is determined by calculation based on the law of universal gravitation in a form applicable to the proposed form of the IGP.
The immobility of the instrument under study during the transmission of the acceleration unit eliminates its angular oscillations and the error component due to the projection of the gravity vector. This eliminates the main error component associated with the unexcluded effect of gravity acceleration on the instrument under study, which, under terrestrial conditions, exceeds the reproduced value by many orders of magnitude.
The range of acceleration amplitudes reproduced using the USG-G system is 10-9 - 10-7 m/s2 (the capabilities of the method are significantly broader).
Dostizheniye stol' malykh parametrov obespechivayet vosproizvedeniye i peredachu razmerov yedinits parametrov seysmokolebaniy v diapazonakh malykh znacheniy i reshayet problemu metrologicheskogo obespecheniya naiboleye chuvstvitel'nykh i tochnykh seysmopreobrazovateley. Vo-vtorykh, eto ekvivalentno vosproizvedeniyu uglovykh peremeshcheniy v pole sily tyazhesti v diapazone 10-10 - 10-8 rad (2·10-5 -2·10-3 ugl.s). V dannom diapazone yedinitsa ploskogo ugla s pomoshch'yu komparatora mozhet byt' peredana ustanovkam, realizuyushchim metody peremeshcheniya issleduyemogo pribora. Eto pozvolyayet s sootvetstvuyushchey tochnost'yu opredelyat' uglovyye peremeshcheniya trayektorii SI v protsesse issledovaniy.
Achieving such small parameters ensures the reproduction and transmission of seismic parameter unit sizes in small ranges and solves the problem of metrological support for the most sensitive and accurate seismic transducers. Secondly, this is equivalent to reproducing angular displacements in a gravity field in the range of 10-10 - 10-8 rad (2 10-5 -2 10-3 arcsec). In this range, the unit of plane angle can be transferred, using a comparator, to installations implementing methods for moving the device under study. This allows for the angular displacements of the measuring instrument's trajectory to be determined with appropriate accuracy during research.
PHOTO:
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/Установка сейсмометрическая вертикальная УСВ-2.png)
USV-2 vertical seismometric installation
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/Установка сейсмометрическая горизонтальная гравитационная УСГ-Г.png)
USG-G horizontal gravity seismometer installation
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/Установка сейсмометрическая горизонтальная УСГ-3М.png)
Horizontal seismometric installation USG-3M