SU1024718A1 - Device for measurining atmospheric pressure in barometric levelling - Google Patents

Description

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The invention relates to barometric leveling devices for microbarometers and microbarographs, which are designed to record changes in atmospheric pressure and can also be used when conducting depr (& h) shooting in mines in meteorology when performing work on the study of turbulence and gravitational waves.

Instruments for measuring and recording changes in atmospheric pressure are known, comprising a housing in which a sensing element and a recording device 13 connected to it are installed. The disadvantage of these devices is low measurement accuracy due to the presence of periodic fluctuations in pressure. .

The closest in technical essence to {the proposed statement is a device for recording atmospheric pressure, containing a pressurizer with a sensible response

and recorder 23

A disadvantage of the known device for recording atmospheric pressure is the unconditional setting of the pressure recording time. The size of the temporary gate, equal to ZO-tO s, is dictated only by convenience (short pulse counting when measuring frequency) and does not take into account the nature of the pressure change over time. In particular, the duration of measurements and their discreteness do not depend on the periodicity of the copepia of the atmospheric pressure. For example, if the measured atmospheric pressure is dominated by oscillations with a period greater than kQ s, then the pressure averaged over the autonomous component c will be distorted by the influence of low-frequency (with a period greater than tO); In addition, the frequency spectrum of the atmospheric pressure is not equal to | M9 (it obviously changes, but the instrument does not have a device that takes into account these changes,

The purpose of the invention is to apply measurement measurements by eliminating ne5 oflM4eckHX atmospheric pressure fluctuations.

The goal is achieved by the fact that the adder and divider connected in series between the first output are inserted into the device containing a pressure transducer with a sensitive element and a recorder.

the converter and the recorder input, and a sequentially connected correlometer and a driver with two outputs, the input of the correlometer 5 connected to the second output of the converter, and the two outputs of the driver connected to the second inputs of the adder and the Divider,

The drawing shows a block diagram of the proposed device,

Still, it contains atmospheric pressure transducer 1 with a sensitive basis 2, krrel Ometr 3, Shaper 4 durations from: m éreigny, adder 5 divider 6, recorder 7..The accumulator 5 and Divider are connected in series and installed between press 1 and registrar 7, and driver k and correlometer 3 are interconnected. In this case, the correlometer 3 is connected to the output of the converter 1, and the form 1 pin of the k terminal is connected to the inputs of the adder 5 and the splitter 6,

The device works in a shiny manner,. ;

Changes in atmospheric pressure are sensed by sensing element 2 and converted to electrical

0 the signal is proportional to the pressure change, for example, to the frequency of the alternating current f (P), then the signal goes to the inputs of the adder 5 and the correlometer 3. The correlometer 3 determines the parameter of the periodic component of atmospheric pressure fluctuations, the signal proportional to the unit shaper, where 2K is generated (K is the number of periods), From the output of block 4, the signal goes to one input of the adder 5, the second input of which receives a signal proportional to the pressure change from the converter 1, the signal sets for a long time be measured. f (P) (summation) and, thus, on

the input of the adder 5, a signal is generated,

2tK - 9 Z f (P) This signal is applied to

ABOUT -.

one input of the divider 6, the second input of which receives a signal from the output of the forcing device k; In the divider 6, a signal is generated that is proportional to the average value of the measured atmospheric pressure during the time interval 5 times the periodical component i

2tK

I102 7184

The results of the division are fed into the times multiple of the period of the periodic horn 7. component, i.e. atmospheric value. Thus, the device allows a periodic component (since it gets 1 to obtain an average value of the at j, the sum of the periodic function of the pressure system for a time interval that is a multiple of a period is equal to zero).

pressure free of pressure

Claims (1)

DEVICE FOR MEASURING ATMOSPHERIC PRESSURE DURING BAROMETRIC LEVELING, containing series-connected trans a pressure divider with a sensitive element and a recorder, so that with the aim of increasing the measurement accuracy by eliminating periodic fluctuations in atmospheric pressure, an adder and a divider are inserted into it, connected in series between the first output of the converter and a recorder input, and a correlometer and a shaper connected in series with two outputs, the correlometer input being connected to the second output of the converter, and two shaper outputs connected7 respectively to the second inputs of the adder and divider. 81ΖΦΖ0ΐ'Τί ^ Γ ⁶¹ a