RU158232U1 - DEVICE FOR MEASURING ACCELERATION OF FREE FALL ON THE BASIS OF NANOTUBES - Google Patents

Abstract

A device for measuring the acceleration of gravity of bodies based on nanotubes, characterized in that between the plates of a flat capacitor made of conductive plates, there is a working fluid made of conductive nanotubes, inside which there is a working fluid.

Description

The utility model relates to the field of gravimetry and seismology and is designed to measure the magnitude of the acceleration of gravity with high accuracy. The proposed device can be used to assess changes in the acceleration of gravity when detecting minerals and monitoring seismic activity.

Currently, a known method and device for measuring the acceleration of gravity (Patent 2494405 RF, IPC G01P 15/14, G01V 7/00, 2013). The design of the device includes a solid platform with the possibility of a revolution about a horizontal axis, on which a sensing element is mounted, made in the form of a disk mounted on an axis with through holes through which the light flux from the source passes. The optical information retrieval system consists of two sensors with recounting devices that record the change in light pulses by the number of intersections of the light flux by the top axis. Then the data obtained from the sensors are processed by complex mathematical transformations with the determination of the value of the acceleration of gravity. This device has a number of significant disadvantages, namely:

1) the complexity in automating the process of calculating the magnitude of the acceleration of gravity;

2) the need to place the device on a flat horizontal surface;

3) insufficient reliability of the recorded data due to the appearance of methodological errors;

4) the complexity of the design of the device.

Also known is a method and apparatus for measuring acceleration of gravity (RF Patent 2504803, IPC G01V 7/00, 2014). This device is equipped with a gravimetric sensor containing a test mass and an electromechanical transducer located on a disk with an axis; primary converter; deformation recorder; an amplifier; digital converter; by computer. The rotation of the disk in the forward and reverse directions with a given angular velocity is carried out by a forced rotation drive. The disk is placed in a coordinate device that provides the ability to perform measurements in the selected spatial position of the rotation plane. The device is equipped with a recorder of angular speed of rotation of the disk, for example, a stopwatch.

This device has the following disadvantages: it does not have sufficient reliability of measurements, requires placement on a flat surface and training personnel for measurements.

Closest to the proposed device is a device for implementing the capillary method of measuring the acceleration of gravity (Patent 2527657 of the Russian Federation, IPC G01V 7/00, 2014). The device contains a flat capacitor, between the plates of which there is a working fluid made of a set of thin capillaries, and the plates and the working fluid are placed in a container with a wettable liquid. When the magnitude of the acceleration of gravity changes, the level of liquid rise in the capillaries changes, changing, in turn, the volume of liquid between the plates of the capacitor and the value of its capacity.

The disadvantage of this invention is that the capacitors built on the basis of the proposed method have significant dimensions, which imposes significant restrictions on the possibility of using this device.

The technical result, the achievement of which is proposed by the proposed utility model, is to reduce the size of the device for measuring the acceleration of gravity while ensuring high accuracy of its operation.

The technical result is achieved through the use of nanotubes in the device as a working fluid.

The essence of the proposed device for measuring the acceleration of gravity based on nanotubes is as follows. A nanotube has capillary properties and if you place such a capillary with a working fluid between the plates of a flat capacitor, then the value of the capacitance of the capacitor will be determined by the level of liquid rise in the nanotube, and accordingly depend on the acceleration of gravity.

Description of illustrations:

FIG. 1 - Nanotube-based capacitor;

FIG. 2 - Dependence of the capacitance of a capacitor based on a nanotube C (g) (nF) on the value of the gravitational acceleration of bodies g (Gal).

The proposed device is based on the capillary properties of a conductive nanotube 1, placed between the plates 2 of a flat capacitor made of conductive plates with leads 3. Due to the capillary properties, the working fluid 4 inside the conductive nanotube 1 rises to a height h, which depends on the value of the gravitational acceleration g .

In turn, the working fluid 4, which rises inside the conductive nanotube 1, affects the capacitance of the capacitor. The capacitance of the capacitor C at a constant value of the dielectric constant ε _{2 of the} used working fluid 4, the dielectric constant of air ε ₁ , the dielectric constant of vacuum ε ₀ , the distance a between the plates 2, the height b of the plates 2 and the diameter d of the non-conducting nanotube 1 depends on the acceleration value of the free fall g, and is determined by the formula:

.

.

A distinctive feature of the proposed device is the ability to change its capacitance C by several orders of magnitude when using a capacitor with several hundred current-conducting nanotubes 1 installed between its plates 2.

So, based on the results obtained, a change in the capacitance C of a capacitor based on a current-conducting nanotube 1 with a change in the acceleration of gravity by 1 Gal is several picofarads:

C (981) -C (980) = 3.535 × 10 ^-12 F.

When using a capacitor with 500 current-conducting nanotubes 1 installed between its plates 2, it is possible to obtain a change in capacitance C to a few nanofarads:

C (981) -C (980) = 1.767 · 10 ^-9 F,

what is available for measurement by value.

The use of this device does not require serious preparatory and organizational costs and reduces the number of possible methodological errors on the part of staff. The design of the device has compactness, versatility, significant accuracy and a high degree of possible automation of measurements.

Claims (1)

A device for measuring the acceleration of free fall of bodies based on nanotubes, characterized in that between the plates of a flat capacitor made of conductive plates, there is a working fluid made of conductive nanotubes, inside which there is a working fluid.

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