GRAV 55 PORTABLE BIDIRECTIONAL FIELD GRAVIMETER
Gravimeters are instruments to measure the Earth’s gravity (g) at the point where the device is installed or in real time mode are called Absolute Gravimeters. Devices that measure the differences in the gravitational field over time or gravity differences between observation sites are called Relative Gravimeters. GRAV-55 can be used in both mode. The range of GRAV-55 sensitivity is more than 5000 square kilometers because it detects variations in the Earth’s core, detects the influence of celestial bodies and planetary alignments, tidal forcing, tidal loading, atmospheric pressure loading, and seasonal changes. Measurements made with GRAV-55 are both gravimetric and electrical.
What is GRAV-55?
GRAV-55 is a bidirectional electromagnetic levitation field gravimeter with a gravitational pendulum function.
On what principle does it work?
The GRAV-55 device works on the principle of measuring compensation currents, gravitational stability and gravitational pendulum. A magnetic field produced by five superconducting coils levitates two spherical proof mass. The spheres tries to move up, down or laterally in response to changes in gravity. A voltage is applied to keep the sphere at it’s equilibrium position. This voltage is proportional to changes in gravity. The principle of the gravimetric pendulum consists in attachment to the levitating sphere of a pendulum whose movement due to the stabilization field and gravitational forces is detected and recorded by CMOS laser sensors.
What sensors does GRAV-55 use?
The device use internal 3-axial magnetic field chipset connected to an integrated oscilloscope, 2 optical laser CMOS sensors for gravitational pendulum mode recoding connected to a portable computing unit.
What software is compatible?
GRAV-55 supports any software for measuring electrical signals and frequencies. The device also uses an dedicated ARC Pendulum software for measurements in gravitational pendulum mode.
The GRAV-55 is an combined bidirectional gravimeter optimized for fast data acquisition and portability in indoor applications. The instrument doesn’t allows operation in harsh field conditions on open outdoor sites in the sun, snow, and wind. The device consists of the gravimetric sensor and the computer unit, respectively power supplies. This device is not made for Geology & mineral resource exploration. This device is an experimental one and is not made for factories production and is not a metrologically declared device. The calibration of the device is performed according to the location where the GRAV-55 works and depends on what the user wants to measure. Annex 1 contains calibration instructions.
Do you need an operational Op-amp to run the device?
GRAV-55 does not use a hardware operational amplifier because its components are already working at high currents and the internal oscillator handles these currents excellently. However, whoever wants can do more hacks to get a signal from the PCB motherboard of the device to connect them to an Op-amp.
For what reason it was created?
GRAV-55 was created for private scientific research under the contract number 544332/2018 in partnership with the company Seicen Soft SRL. The device is intended for private research within the ASAR Seismic Center and its collaborators. The reason is the solid tidal measurement, the measurement of the orbital induction on the solid core of the Earth, Astrophysics Quantum Mechanics.
What are the spheres?
The spheres are composed of magnetic conductive elements in order to be stabilized in the levitation electromagnetic field. The spheres are commercial objects like any other sphere but they have been coated with an outer shell ionized with gold powder to increase the electrical conductivity. Spheres are a handcrafted product that is commercially available but are part of the levitation assembly.
What results have been obtained with the GRAV-55 device?
Amplitude variations near the moments of lunar and solar eclipses, both spherical components support maximum variations in amplitudes depending on the hemispherical location where the eclipse takes place, presenting vertical or horizontal compensation characteristics.
Fig.1.July 16-17, 2019 Measurements by GRAV-55 during the lunar eclipse
Fig.2.July 2, 2019 Measurements by GRAV-55 during the Solar eclipse
One sphere is held in antigravitational compensation against the direction of the gravitational field and the other sphere in the direction of the gravitational field, ie downwards, thus allowing the measurement of pushing or attracting forces. It has been discovered with the help of GRAV-55 that certain phases and orbital locations of the Moon exert measurable forces both attraction and push. Again, with GRAV-55 it has been discovered that celestial bodies designate certain tidal areas in which the forces of attraction overlap with those of thrust. GRAV-55 also measured gravimetric compensation signals at certain orbital geometries of the main celestial bodies in the vicinity of the Earth. However, these signals are less obvious in the linear “classical alignments” of the planets or in elevation azimuth eclipse type alignments and are more often recorded in certain geometric formations of celestial bodies (Fig.3), pressure-generating formations that are explained theoretical by the quantum induction of the geoids and their influence on the thermodynamic processes of the Earth’s core.
| Fig.3 Signal from an orbital induction geometry in the Earth’s core. |
However, the amplitude will vary depending on the location of the measurements toward the target event. Seismic precursor signals were recorded before major earthquakes around the globe but also locally in the vicinity of the device’s location. However, the measurement of electromagnetic compensation fields cannot clearly determine whether these measured forces are strictly gravitational and do not have geomagnetic or electro-elastic elements on the geoid-electrode principle. The device is an experimental one and it is up to the users to discover new measurement methods with the help of GRAV-55, and the results appear depending on the space-time correlation and the individual calibrations of the users.
Precursor electrogravity signals recorded using GRAV-55
Location of recording 47.163 N, 27.582 E. The signals were detected 12 to 2 hours before the earthquake. Measurement type: compensation based on a oscilloscope software to filter natural noises and by the internal hardware oscilloscope for correction. Error <5.0%.
| Magnitude | Mw 6.8 |
| Region | EASTERN TURKEY |
| Date time | 2020-01-24 17:55:14.2 UTC |
| Location | 38.37 N ; 39.22 E |
| Depth | 15 km |
Fig.4 Precursor seismic signal recorded with GRAV-55 2020-01-24 11:13 – 14:25 UTC
| Magnitude | Mw 7.7 |
| Region | CUBA REGION |
| Date time | 2020-01-28 19:10:25.1 UTC |
| Location | 19.37 N ; 78.85 W |
| Depth | 10 km |
Fig.5 Precursor seismic signal recorded with GRAV-55 2020-01-28 16:35 – 17:01 UTC
Because the purpose of this device is scientific research and experimentation, the measurements were made both in the amplitude of the currents and in their frequency.
Stabilized voltage sockets were used and the location chosen for the measurements was one isolated from the high voltage lines and the noise of the city. The measurements interfere quite a lot with the disturbances of the domestic and industrial devices or with its mounting near the lakes and waters.
| Magnitude | Mw 6.5 |
| Region | SOUTHERN IDAHO |
| Date time | 2020-03-31 23:52:31.3 UTC |
| Location | 44.45 N ; 115.14 W |
| Depth | 10 km |
Fig.6 Precursor seismic signal recorded with GRAV-55 2020-03-31 20:22 – 22:05 UTC
In order to use GRAV-55 in both modes and in gravimetric pendulum mode, a very light extension must be attached to each sphere, so that the weight of this extension can be used in subsequent filtering calculations, an extension that has a circle at the end or rectangle passing in front of the laser recording sensor.Below is the diagram of the use of the device in gravimetric pendulum mode. Due to the electro-magnetic compensation field and gravity, the spheres tend to have a rotational motion or the rotation sometimes occurs due to gravitational waves or changes in the magnetic field, for this a pendulum indicator was mounted on each sphere to be measured and recorded. this movement by the CMOS laser sensors and the data is sent to the computer via usb cable or with a remote usb device.
Fig.7 Use of GRAV-55 as a gravimetric pendulum.
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Click here for Annex 2
