SU1247650A1 - Acoustic hydrostatic level - Google Patents

Abstract

The invention relates to measuring equipment, to devices for measuring the sediment of industrial and special structures. The purpose of the invention is to increase the measurement accuracy. Each sync pulse, produced by synchronizer 8, triggers a probe pulse generator 11, which produces powerful short pulses that excite acoustic transducers 5. A short ultrasound pulse is emitted from the surface of liquid 3, partially reflected from screen 6 and partially from liquid level 3. Received By acoustic transducer 5, echo pulses are transformed into electrical signals and transmitted through amplification (L with ISO 1 Od

Description

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17 to the inputs of the formers 1 of the measuring channels 9 and 10, the pulses from which through the fixing unit 14 of the echo pulses arrive at the block 15 measuring the delay of the echo pulses. Information from measuring channels

The invention relates to a measurement technique, in particular, to devices for determining elevations by means of interconnected vessels filled with a homogeneous liquid, and can be used for systematic measurements of the sediment of industrial and special reconstructions.

The purpose of the invention is to increase the measurement accuracy.

The device (Fig. 1) contains communicating vessels 1 and 2 with working fluid 3, connected by pipe 4, at the ends of which acoustic transducers 5 are installed, at a given distance from which screens 6 with openings 7 are placed. The recording part of the device contains synchronizer 8j connected to the first inputs of two identical measuring channels 9 and 10, each of which contains a series-connected generator 11 probing pulses, the output of which through the first output of the measuring channel 9 (10) is connected to the input of the corresponding the acoustic transducer 5, amplifier 12, driver 13, block 14 for fixing the first and second echo pulses, block 15 for measuring the delay time of the first and second echo pulses and block 16 for counters, the installation input of which is connected to the output of the synchronizer 7, as well as series-connected polling unit 17, whose inputs are connected to the outputs of the first and second measuring channels 9 and 10, the arithmetic unit 18, the indicator 19 and the generator 20 of counting pulses.

The device works as follows.

The reference vessel 1 is installed on the structural element at the point with

9 and 10 from the registers of block 16 are fed to block 17 of the survey, from there they are entered into the arithmetic block 18, and the counting results are displayed by an indicator 19. 1 sludge.

known absolute altitude, and the measuring vessel 2 is placed at a point, the altitude position of which is necessary to determine.

5 After some time, the liquid 3 in the vessels 1 and 2 through the pipe 4 is established at a certain level, i, and the distance from the surface of the level in each vessel to the surface of the corresponding acoustic; Converter 5 will differ by the difference between the elevations of the measuring point and the reference point. points.

five

After turning on the device, the synchronizer 8 begins to produce periodically following short electrical impulses (duty cycle

0 pulses is determined by the speed of a particular type of arithmetic unit 18). Each sync pulse starts the generator 11 with a probe pulse, setting up the initial state of the blocks

14, 15, and 16 in each measuring canape 9 and 10. When each sync pulse arrives, generator 11 produces powerful short pulses that excite the corresponding acoustic transducers 5. As a result, a short ultrasonic pulse is emitted towards the surface of the liquid 3, which is partially reflected from this: : it is 6) a partly (energy relations are determined by the size of the hole 7) from the surface of the liquid level 3. Since it is always the first

to acoustic transducer 5

 .t.T--. . , ..,

an echo impulse reflected from the screen 6 enters, hereinafter, the named impulses will be distinguished by their number-, frames: the first and second echo impulses.

Received echo pulses with the same acoustic transducer 5 are transformed into electrical signals and then transmitted through appropriate amplifiers 17 to the inputs of drivers of each channel 9 and 10. From the outputs of the drivers, pulses go to block 14 for fixing the first and second echo pulses, and then to the unit 15 for measuring the delay time of the first and second echo pulses. Pulses from a generator of 20 counting pulses are fed to the right input of block 15. From block 15, counting pulses are passed to the corresponding outputs of the block

16 during the delay time of the first and second echo pulses. In block 16, counters count the counting pulses, and the counting results are then recorded in the corresponding registers of block 16 (for the first and second echo pulses in a separate register). Recording to the registers is controlled by two buses from block 15. After the second echo pulse arrives, block 15 issues a Disable signal to block 14, prohibiting the passage of subsequent echo pulses to the output of block 14 Information from each measuring channel 9 and 10 from block registers 16 in the form of a parallel binary-decimal code is fed to the inputs of the block.

17 questions, from where they are then entered into the arithmetic unit 18, the results

Editor A.Dolinich

Compiled by V.Yazarov Tehred L.Oleinik

Order 4110/38 Circulation 670 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

displayed iwdikatrr

accounts 9.

Claims (1)

Invention Formula Acoustic hydrostatic level, containing communicating vessels with liquid, connected by pipeline, at the end of which acoustic transducers are installed, two identical measuring channels with blocks measuring the delay time of the first and second echo pulses, syncron, mash, successively connected generator of probe pulses, an amplifier-limiter, as well as a polling unit connected in series and an arithmetic unit with an indicator, characterized in that, in order to improve the measurement accuracy, each A common vessel is provided with a screen with an opening set at a predetermined distance from the acoustic transducer, and between the amplifier output and the input of the interrogation unit sequentially connected shaper, the fixing unit of the first and second echo pulses, the measuring unit of the delay time of the first and second echo pulses and counters, as well as a generator of counting pulses, the output of which is connected to the input of blocks measuring the delay time of the first and second echo pulses of the measuring channel. Proofreader M. Demchik