Circuit arrangement and method for monitoring a hazardous device by evaluating the acceleration

US9168655B2 · kind B2 · utility

Assignee

• PHOENIX CONTACT GMBH & CO. KG · DE

Inventors

• Markus Rohs · Steinheim, DE
• Juergen Teutenberg · Ottobeuren, DE
• Celarie Marceraus Donbou Kenfouet · Bad Pyrmont, DE

Key dates

• Filing date: Apr 12, 2012
• Grant date: Oct 27, 2015
• Expiry date: Dec 22, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G05B2219/49138
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A circuit arrangement which comprises at least two acceleration sensors for measuring an acceleration of at least one part of the hazardous device, at least one logic circuit for evaluating measured values of the at least two acceleration sensors, at least one memory for storing a comparison value, and at least one safety device controlled by an output of the logic circuit. The safety device is adapted to bring the hazardous device into a safe state in response to a switching command received via the output of the logic circuit. The logic circuit transmits the switching command to the safety device when the measured acceleration of the part of the hazardous device or a value derived from the measured acceleration has a predetermined ratio to the stored comparison value. Furthermore, a method for monitoring a hazardous device is also disclosed.