SU65161A1 - Gas barometer - Google Patents

Description

Aneroid heights applied up to icerol time provide heights with insufficient accuracy for a number of practical purposes. In addition, the aneroid is unstable. In 1CD € a solution of mechanical devices. ;

Differential height meter

Mendeleev (-Modernized TsNIIGA and K, GUGSK) is rather sensible to changes in atmospheric pressure, “in terms of the construction of thunder electrons and requires very great“ O1ga with nnm & In the xipyinKOCTH parts,

Working with well-known methods: with the help of numerous first and third observations of altitudes in the field — their measurement of air and instrument temperature, water mixing, oil settling, alternating wings, etc., and bulky 1 hours.

Ta1YuI | M way, in addition to practical disabilities, there is no confidence in the results of height measurements due to; | possible errors in field observations and digital camera calculations.

Therefore, it is important to consider portable and reliable in

action (altimeter, providing the necessary accuracy.

The present invention is based on the creation of such an altimeter by the well-known pelvic floor heat meters, which compensate for the effect of temperature changes on their readings. In order to keep the pressure in the gas chamber constant, my from the change in air temperature, ha: call, according to the invention, formed by two concentric cylinders. These cylinders include a D2a piston connected by a rod, one of which is under the (Medium environment, with a coefficient (expansion, different from the coefficient of expansion of the medium filling the gas chamber). Due to this, when the outside temperature changes (air car; match © The volume of the gas chamber varies.

In FIG. 1 shows a longitudinal section of np “i6op and FIG. 2 - side view.

In concentric cylinders 1 and

2g can be moved in the yusevom direction of the port 3 And- 4. Piston

3. The inside is hollow, and the outside ends with a cylindrical rod for guiding the spring (5.

The piston 4 ends with a rod 13, diving (piston 13.

 6 is filled with oil, detached from the air chamber 7 by the piston 4.

Gas chamber 7 is connected to a manometry tube (glass) 8. In this tube is a liquid | (| quadrooin) column 9, which isolates the air that is IB KaiMepe 7 from the outside and hassled it through the tube in case of changes in external air pressure.

The end of the tube, exit w, s out, open. The device eliminates errors from changing the air temperature inside the gas chamber 7, because with this external pressure. The primary air pressure in the chamber 7 is maintained, motr. “A change in the temperature of this air.

This is achieved by an automatic change in the volume of 1kA (measure 7 when the piston 3 is displaced in connection with I13 by changing the volume of the oil 1 in chamber 6 under (temperature).

The movement of pistons S and 4 (up occurs when the volume of oil increases, i.e. when: its temperature rises. In the opposite case, the pistons will move downwards with the action: springs 5. In other cases, the increase in the volume of air calgers stabilizes her initial pressure i

The temperature correction is known. The (1 + K) IB barometric formula to the instruments is also automatically taken into account due to the volume of air in the manometric tube.

The increment of this volume with the change in height above the level of the sea and temperature changes in the chamber ne) the initial pressure by) the value corresponding to the said correction.

By turning Wimta 10, the piston 3 is displaced longitudinally. Through the oil in chamber 6 and the piston

4, in varying with which the volume of gas: the base pressure and the pressure in it change.

Therefore, the liquid column 9 can be set at the expense corresponding to (geodetic mark at the initial point. At the last, it is necessary to conduct an observation and a reference height in order to take into account the measured pressure and the atmospheric pressure during the production.

The device is mounted in a metal box 12, filled with solid iron (| ma | scrapping). On the front side (the device has a glass (transparent) to the market 11. The scale is calculated according to 1 according to the corresponding calculation and is applied directly to the tube OR; the metallic plastic under the tube .;

Calculated for: mula1 altimeter:

(t-)

/ g icda

where h - | (: length 1 уу6кк), V is the volume of the gas cylinder (corresponding to the normal pressure “at the sea level); d is the inner diameter of 1Mano; a Metriche tube, P is the average height of the mercury column above the sea level, and the average BbBcoTai of the mercury column at this point of earth's surface (above the sea level).

Subject invention

The gas gauge is an altimeter with the impact of temperature on the display, which differs from Ci in that, in order to keep the pressure in the gas chamber constant, regardless of the change in temperature of the outside air, the gas chamber 7 is formed by two concentric cylinders. I and 2 for pistons 13 and 3 connected by means of brushes, of which piston 4 is under the influence of the medium by a spreading factor that differs from (coefficient: expansion of the medium filling the gas KaiMepy) in order to change the volume of the valve Pelvic chamber when BSMeHeHiHHi te.teratures outside air.I

FIG. one

FIG. 2

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