SU1619056A1

SU1619056A1 - Device for discrete checking of piece material level in underground tanks

Info

Publication number: SU1619056A1
Application number: SU884421474A
Authority: SU
Inventors: Михаил Васильевич Пасичник
Original assignee: Предприятие П/Я А-1811
Priority date: 1988-05-07
Filing date: 1988-05-07
Publication date: 1991-01-07

Abstract

Изобретение относитс к приборостроению и может быть использовано в горнодобывающей , металлургической и др отрасл х промышленности дл автоматического контрол уровн кусковых материалов , например горной массы в подземных емкост х. Изобретение позвол ет повысить помехозащищенность измерений за счег накоплени и обработки данных о параметрах входных сигналов. Сигналы, возникающие от удэров падающего материала в точке А, по вл ютс в отдаленном датчике 7 позже , чем п ближнем датчике 6 Величины данного запаздывани функционально завис т от уровн кускового материала в подземной емкости. Измерительный блок измер ет врем запаздывани и определ ет тем самым уровень Повышение помехозащищенности измерений достигаетс за счет определени коорел ции (осуществл емой цифровым методами) сигнала, пришедего в дальний датчик 7 и задержанного на р д дискретных интервалов сигнала ближнего датчика 6. Коррел ци между данными сигналами наибольша , если врем задержки сигнала датчика 6 равно времени задержки и сигнала датчика 7 Этот момент возникает из-за разницы в акустических пут х Таким образом, осуществл етс повышение помехоустойчивости и измерение времени задержки Новым в устройстве вл етс осуществление задержки и коррел ции . 3 ил С/The invention relates to instrumentation and can be used in the mining, metallurgical and other industries of the industry to automatically control the level of lumpy materials, such as rock mass in underground tanks. The invention allows to increase the noise immunity of measurements due to the accumulation and processing of data on the parameters of the input signals. The signals arising from the uder of falling material at point A appear in remote sensor 7 later than in near sensor 6 The magnitude of this delay is functionally dependent on the level of bulk material in the underground tank. The measuring unit measures the lag time and thus determines the level. The increase in the noise immunity of the measurements is achieved by determining the coordination signal (carried out by digital methods) of the signal sent to the far sensor 7 and delayed by a number of discrete intervals of the signal of the near sensor 6. The signals are greatest if the delay time of the sensor signal 6 is equal to the delay time and the signal of sensor 7 This moment occurs due to the difference in the acoustic paths. Thus, the increase in mechanical stability and measurement of delay time New in the device is the implementation of delay and correlation. 3 silt C /

Description

Фиг. 2FIG. 2

Ю П W 16 78 tYou P W 16 78 t

IV I IL14IV I IL14

Врем запаздывани Lag time

8 Ю П Щ 16 Номера разр дов регистра8 Yu P 16 Number of bits of the register

Фиг.ЗFig.Z

/9/9

Claims

A device for discrete control of the level of bulk materials in underground tanks, containing two seismic vibration sensors connected mechanically through the body of the rock mass to the tank and connected to the measuring unit, characterized in that, in order to increase the noise immunity of the measurements, the sensors are located at different distances from the underground tank, and the measuring unit consists of the first and second pulse formers, the inputs of which are connected through the first and second inputs of the measuring unit to the first and second sensor seismic oscillations, first and second one-shots, two-input inverter, 5 clock pulses, frequency divider, shift register, coincidence elements, the number of which is three more than the number of discrete controlled levels, counters, the number of which is equal to the number of discrete controlled levels, multi-input OR element, a deciding device and a trigger, while the output of the first driver is connected to the information input of the shift register and to the start input of the first one-shot, the output of which is connected to the first mu input of the inverter, the output of the second driver is connected to the start input of the second one-shot, the output of which is connected through the inverter to the first input 20 of the multi-input element OR, the output of which is connected to the input of zeroing the trigger, the installation input of which is connected to the output of the first matching element, the non-inverse output of the trigger is connected to the first equalization of the resolver and to the first input of the third element of matches, the second input of which is connected to the signal output of the resolver, the third input of the third element matches is connected to the output of the first one-shot, the output of the second driver is connected to the second input of the second match and to the first input of the first match 10, and the output of the generator is also connected to the third input of the second match and through the frequency divider to the clock input of the shift register, the outputs which are connected to the first inputs of the remaining elements of matches, the second inputs of which are connected to the output of the second element of matches, and the outputs are connected to the counting inputs of counters, the outputs of The implementations of which are connected to the various inputs of the multi-input OR element, with the information outputs of the counters connected to the information inputs of the resolver, and the output of the third coincidence element connected to the zeroing inputs of the second coincidence element, inverters, and to the second input of the first trigger output connected to the input of the matches.