公开(公告)号：US10533887B2

公开(公告)日：2020-01-14

申请号：US15511401

申请日：2015-09-14

Applicant: ELTEK S.p.A.

Inventor： Matteo Rondano ,  Enrico Chiesa ,  Mauro Zorzetto ,  Domenico Cantarelli

IPC: G01F23/26

Abstract: A sensor for detecting the level of a medium contained in a container, in particular a tank, comprises: an array of capacitive elements designed to be associated to the container (1), in particular so as to extend according to an axis of detection (X) of the level of the medium (L), the array of capacitive elements comprising a plurality of electrodes (Ji-Jn), in particular on a face of an electrically insulating substrate (20) having a generally elongated shape, the electrodes (Ji-Jn) being spaced apart from one another, in particular along the detection axis (X), and being preferably substantially coplanar with one another; at least one insulation layer (16) for insulating electrically the electrodes (Ji-Jn) with respect to the inside of the container (1); and a controller (24) having a plurality of inputs. Each capacitive element comprises at least one of a single electrode and a set of electrodes connected together in common, in particular in parallel, the single electrode or the set of electrodes being connected to a respective input of the plurality of inputs. The controller (24) is pre-arranged for discriminating a value of capacitance associated to each electrode (Ji-Jn) in order to deduce the level of the medium present container.

公开(公告)号：US11002586B2

公开(公告)日：2021-05-11

申请号：US16065571

申请日：2016-12-23

Applicant: ELTEK S.P.A.

Inventor： Matteo Rondano ,  Mauro Zorzetto ,  Enrico Chiesa

IPC: G01F23/26 ,  G01F25/00 ,  G01F23/00

Abstract: A capacitive level-sensor device, for detecting the level of at least one medium contained in a container comprises: a detection part that includes an array of capacitive elements, the array of capacitive elements comprising at least one set of electrodes on a substrate, the electrodes being set at a distance from one another according to a level-detection axis, the detection part including at least one insulating layer for electrically insulating the electrodes with respect to the medium; and a control circuit having a plurality of first inputs, electrically connected to which are the electrodes. The control circuit is prearranged for carrying out a sequential sampling of the inputs of the plurality of first inputs and for comparing a value representing the capacitance associated to each electrode with at least one corresponding reference threshold.
The detection part further comprises at least one temperature sensor, connected to at least one respective second input of the control circuit.
The control circuit is moreover prearranged for carrying out a compensation of at least one of the following: the value representing electrical capacitance associated to each electrode; a value indicating the medium facing each electrode and the at least one reference threshold, according to information representing at least one temperature value acquired on the at least one second input.

公开(公告)号：US10422681B2

公开(公告)日：2019-09-24

申请号：US15315225

申请日：2015-05-28

Applicant: ELTEK S.p.A.

Inventor： Matteo Rondano ,  Enrico Chiesa ,  Mauro Zorzetto ,  Domenico Cantarelli

IPC: G01F23/26

Abstract: A level sensor for detecting the level of a medium contained in a vessel comprises: an array of capacitive elements designed to be associated with the vessel (1), comprising a plurality of electrodes (J1-Jn), spaced apart from each other along an axis of detection (X), an insulation layer (16) for electrically insulating the electrodes (J1-Jn) with respect to the inside of the vessel (1), a controller (24) having a plurality of inputs. Each capacitive element comprises at least one of a single electrode and a group of electrodes connected in common to each other, the single electrode or the group of electrodes being connected to a respective input of the plurality of inputs.The controller (24) is prearranged for discriminating a value of electrical capacitance associated with each electrode (J1-Jn) to deduce the level of the medium present in the vessel.

公开(公告)号：US10578477B2

公开(公告)日：2020-03-03

申请号：US15511482

申请日：2015-09-14

Applicant: ELTEK S.p.A.

Inventor： Matteo Rondano ,  Enrico Chiesa ,  Mauro Zorzetto ,  Domenico Cantarelli

IPC: G01F23/26

Abstract: A sensor for detecting the level of a medium contained in a container, in particular a tank, comprises: an array of capacitive elements designed to be associated to the container (1), in particular so as to extend according to an axis of detection (X) of the level of the medium (L), the array of capacitive elements comprising a plurality of electrodes (J1-Jn), in particular on a face of an electrically insulating substrate (20) having a generally elongated shape, the electrodes (J1-Jn) being spaced apart from one another, in particular along the detection axis (X), and being preferably substantially coplanar with one another; at least one insulation layer (16) for insulating electrically the electrodes (J1-Jn) with respect to the inside of the container (1); and a controller (24) having a plurality of inputs. Each capacitive element comprises a set of electrodes connected together in common, in particular in parallel, each set of electrodes being connected to a respective input of the plurality of inputs. The controller (24) is pre-arranged for discriminating a value of capacitance associated to each electrode (J1-Jn) in order to deduce the level of the medium present container.