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Title:
PROTECTION DEVICE WITH A PRESSURE-SENSITIVE SENSOR FOR MONITORING AN INDUSTRIAL PLANT
Document Type and Number:
WIPO Patent Application WO/2018/024838
Kind Code:
A3
Abstract:
The present invention relates to a protection device (10, 12) with a pressure-sensitive sensor (22) comprising a plurality of first electrodes (46) and a plurality of second electrodes (48). Each of the first electrodes (46a-46h) overlaps one of the second electrodes (48a-48e) in a corresponding coupling site (50), and each of the first electrodes (46a-46h) is spaced apart from the corresponding second electrode by a pressure-sensitive material (56) at the corresponding coupling site (50), in such a way that when a force is applied to the coupling site (50) an electrical resistance (58) between the corresponding first electrode (46g, 52) and the corresponding second electrode (48d, 54) changes. An electronic measurement unit coupled to the plurality of first electrodes (46) and to the plurality of second electrodes (48) is designed to determine successively the electrical resistance (58) at the corresponding coupling sites (50). An evaluation unit (90) is designed to provide an output signal depending on the measured electrical resistances (58), the electronic measurement unit being designed, in order to determine the electrical resistance (58) at a coupling site (50) via the corresponding first electrode (46g, 52) and the corresponding second electrode (48d, 54), to connect the other first electrodes and second electrodes to a connection for receiving a defined potential (72), allowing an isolated measurement of the electrical resistance (58) at the coupling site (50).

Inventors:
HART FABIAN (DE)
IBROCEVIC ONEDIN (DE)
KUCZERA MATTHIAS (DE)
SCHWEIKER MATTHIAS (DE)
NEUSCHWANDER BERND (DE)
TEKDAL FABIAN (DE)
CHERAY PHILIPPE (DE)
Application Number:
PCT/EP2017/069699
Publication Date:
March 29, 2018
Filing Date:
August 03, 2017
Export Citation:
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Assignee:
PILZ GMBH & CO KG (DE)
International Classes:
G01L1/20; G01R27/14
Foreign References:
DE10303409A12004-09-09
DE20014200U12000-12-14
Attorney, Agent or Firm:
WITTE, WELLER & PARTNERPATENTANWÄLTE MBB (DE)
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