SU976300A1 - Discrete loose material level gauge transducer - Google Patents

Description

(B) DISCRETE LEVEL TRANSMITTER

one

The invention relates to instrumentation engineering, in particular to the field of devices for measuring the level of bulk materials.

Known sensitive element of the primary converter of a discrete level gauge, made in the form of an electrical capacitor, one of the electrodes of which has the form of a flat spiral, oriented horizontally 13.

The ability of the specified sensing element to bulk materials is limited by the fundamental possibility of accumulating the monitored bulk material in the area of the sensitive element when large fractions of the material get stuck between the turns of the helix, which leads to the formation of false information about the level of the monitored medium.

The closest to the invention to the technical essence is the BULK MATERIALS

sensor element of the primary converter containing two plastic electrodes located in a common vertical plane on a substrate of insulating material 5 2.

However, the known sensing element, the electrodes of which have the form of concentric rings and a circle, does not provide high accuracy and reliability of the primary level converter of bulk materials with different electrical characteristics.

The aim of the invention is to increase the accuracy and reliability of measuring the level of bulk materials with different electrical characteristics.

This goal is achieved by the fact that the sensing element is equipped with

Claims (2)

20 two additional mutually perpendicular plate electrodes placed between the main electrodes of the sensing element, the first lies in the plane of the main electrodes and equidistant from them, and the second is perpendicular to the first and lies in the vertical plane of the first additional electrode , with both the main and additional electrodes in pairs electrically interconnected. FIG. 1 and 2 depict the proposed design of a sensing element with rectangular electrodes, frontal and side views; in fig. 3 shows section A-A in FIG. one . The device comprises a substrate 1 of an insulating material, the main electrodes 2 and 3 of the sensitive element, additional electrodes A and 5 of the sensitive element. The transducer works as follows 4 The transducer operates as part of a level gauge, made in the form of a discrete set of similar transducers, uniformly distributed over the measuring range of the level of the controlled bulk material. Emptying or filling the bulk material between the electrode space of the converter causes a change in its electrical capacitance, the value of which depends on the linear dimensions of the converter, the level of its filling in the bulk material and the electrical characteristics of the latter. The criterion for the presence of bulk materials with various elektricheskimih. The risks at the level determined by the location of the transducer in the level measurement range are the value of its electrical capacitance equal to or greater than the value of the capacitance of the transducer completely immersed in the bulk material with the minimum acceptable values of its electrical characteristics. At the same time, the proposed converter design allows to obtain high sensitivity to bulk materials with a small value of their electrical characteristics with small linear dimensions of the converter, and also provides enhanced resistance to the effects of dust sedimentary bulk materials on it. DETAILED DESCRIPTION OF THE INVENTION Discrete transducer for bulk solids made in the form of a capacitor containing two plate electrodes placed in one plane on an insulating material substrate, characterized in that, in order to increase the accuracy and reliability of measuring the level of bulk materials with different electrical characteristics provided with two additional mutually perpendicular plate electrodes placed between the main electrodes of the sensing element In this case, the first lies in the plane of the main electrodes and:; is equally flat from THEM, and the second is perpendicular to the first and lies in a vertical plane aligned with the vertical axis of the symmetry of the first additional electrode, and the main and additional electrodes are electrically connected in pairs ., Sources of information taken into account in the examination 1.Viktorov VA Resonant level measurement method. M., Energie, 1969, p. 161. 2.Shvets D.S. and others. Resistor discrete means of controlling the level. Instruments and control systems, 1976. No. 9 (prototype). 2 1 T Fig. / FIG. 2 fig.d ,