SU909672A1

SU909672A1 - Electroconductive liquid leakage indicator

Info

Publication number: SU909672A1
Application number: SU802961504A
Authority: SU
Inventors: Николай Дмитриевич Кондаков; Сергей Александрович Попов
Original assignee: Предприятие П/Я Р-6805
Priority date: 1980-07-16
Filing date: 1980-07-16
Publication date: 1982-02-28

Description

1one

Изобретение относитс к приборостроению и может быть использовано дл обнаружени затекани электропровод щей жидкости, например морской воды.The invention relates to instrumentation engineering and can be used to detect the leakage of electrically conductive liquid, such as seawater.

Известен датчик наличи }ШдкосЕИ, использующий изменение сопротивлени междуэлектродного промежутка при попадании в него жидкости l .The presence sensor is known} which uses a change in the resistance of the interelectrode gap when liquid enters it.

Однако в данном датчике отсутствуют средства, контролирующие состо ние его цепей, что снижает надежность контрол наличи воды.However, in this sensor there are no means of monitoring the state of its circuits, which reduces the reliability of monitoring the presence of water.

Наиболее близким, к предлагаемому вл етс датчик наличи электропровод щей жидкости, который содержит ва электрода, соединенные через Линию св зи с резисторным делителем напр жени и источником питани t2.The closest to the present invention is a sensor for the presence of an electrically conductive fluid, which contains all the electrodes connected through a communication line to a resistor voltage divider and a power source t2.

При обрыве линии св зи в указанном устройстве результаты контрол будут недостоверными, так как в нем отсутствует индикаци обрьгаа.If the communication line is broken in the specified device, the control results will be unreliable, as there is no indication of fault in it.

Цель изобретени - повьшение достоверности контрол .The purpose of the invention is to increase the reliability of the control.

Поставленна цель достигаетс тем, что сигнализатор затекани жидкости снабжен резистором, включенным параллельно электродам, четырьм инверторами и двум элементами И-НЕ, при этом входы трех подключены к средней точке делител напр жени , вход четвертого инвер10 тора и первый вход первого элемента И-НЕ соединены с входом делител напр жени , второй вход первого элемента И-НЕ соединен с выходом второго инвертора, а входы второго элеи мента И-НЕ - с шлходамитретьего и четвертого инверторов.The goal is achieved by the fact that the liquid leak detector is equipped with a resistor connected in parallel to the electrodes, four inverters and two AND-NOT elements, while the three inputs are connected to the midpoint of the voltage divider, the fourth inverter input and the first input of the first AND-NO element are connected The input of the voltage divider, the second input of the first NAND element is connected to the output of the second inverter, and the inputs of the second element of the NAND input are connected to the third and fourth inverters.

На чертеже представлена функциональна схема сигнализатора.The drawing shows the functional diagram of the detector.

Сигнализатор затекани жидкости Fluid Flow Detector

Claims

20 contains contact electrodes I, resistor 2, connecting line 3, source; power supply nick 4, voltage divider 5, inverters 6–9, AND – NE elements 10 and II, break indicators 12, norm 13, leakage 14. Liquid leak detector works as follows. In the absence of leakage, the current from the power source 4 flows through a circuit of resistor 2 - connecting line 3 - voltage divider 5. The output of the divider creates a voltage level corresponding to the logic level O, and at its input a logical 1, At the same time, at the inputs of the AND-NE element 10 there will be a level corresponding to logical 1, and at its output, the voltage level corresponding to the logical O. Level logical o the indicator is on. At the outputs of elements 6 and IG, the level of logical 1 is maintained, which prevents the indication from being turned on. In the presence of liquid flowing, the current from the power source flows through the resistor 2, filled electrodes 1, line 3, creating input and output divider 5 voltage levels corresponding to logical 1, and at the output of inverter 6 there will be a level of logical O causing the operation indicator wicking. When line 3 is broken, the input voltage and voltage divider 5 will be the logic level O, the inputs of the AND-NE element 11 will be the logic level 1, and the output level will be the logic level O that will trigger the break indicator. 2 4 The use of continuous monitoring of the integrity of the connecting line allows to increase the reliability of control of the object, especially with a significant length of the line. DETAILED DESCRIPTION OF THE INVENTION Electroconductive liquid leakage detector containing two electrodes connected via a communication line with a resistor voltage divider and a power source, which is characterized by the fact that it is equipped with a resistor, including, to increase the reliability of the controller. electrodes in parallel, four inverters and two IS-NOT elements, while the inputs of three inverters are connected to the midpoint of the voltage divider, the input of the fourth inverter and the first input of the first element AND-NOT are connected to the input of the voltage divider, the second input of the first AND element connected to the output of the second inverter, and the inputs of the second element AND-NOT to the outputs of the third and fourth inverters. Sources of information taken into account in the examination 1. US patent number 3889247, cl. 340-244 C. 1975.

2. US patent number 3790936, cl. 340-244 E, 1974 (prototype). Wet g) / 1 „Ofpbfi If