Wear detection by transponder destruction

• US 20060226984A1
• Filed: 04/08/2005
• Published: 10/12/2006
• Est. Priority Date: 04/08/2005
• Status: Active Grant

• Current Assignee: Meri Entsorgungstechnik Fuer Die Papierindustrie GmbH (Voith GmbH & Co. KGaA)
• Original Assignee: Meri Entsorgungstechnik Fuer Die Papierindustrie GmbH (Voith GmbH & Co. KGaA)
• Inventors: Menke, Lucas
• Granted Patent: US 7,248,154 B2
• Time in Patent Office: Days
• US Class Current: 340/572.100
• CPC Class Codes: B65G 2207/48 Wear protection or indication features
• CPC Class Codes: B65G 33/24 Details
• CPC Class Codes: B65G 43/02 detecting dangerous physical condition of load carriers, e.g. for interrupting the drive in the event of overheating

Abstract

The invention relates to a system and a method for the detection of the wear state of machine parts which are subject to mechanical wear, by means of an electronic transmitting/receiving device (38) and at least one transponder device (36), which is embedded in the machine part (16) and sends back an acknowledgement signal in response to a transmitted signal which is transmitted by the transmitting/receiving device (38), in which case the reaching of a predetermined wear value can be indicated by the destruction of the transponder device (36) and by the lack of the acknowledgement signal associated with this. The invention is based on the discovery that the arrangement of a transponder device at a specific position which is a measure of a predetermined wear state means that the operational readiness of the transponder device, on the one hand, is indicated in advance by its signal return, and the reaching of the predetermined wear value is indicated by its destruction.

Claims

1. A system for the detection of the wear state of machine parts which are subject to mechanical wear, by means of an electronic transmitting/receiving device (38) and at least one transponder device (36) which is embedded in the machine part (16) and sends back an acknowledgement signal in response to a transmitted signal which is transmitted by the transmitting/receiving device (38), wherein the reaching of a predetermined wear value can be indicated by the destruction of the transponder device (36) and by the lack of the acknowledgement signal associated with this, with the transponder device (36) operating with amplitude modulation (AM) and being inserted in the machine part (16) in a depression (34) which is open in the direction of the transmitting/receiving device (38).

2. The detection system as claimed in claim 1, wherein the transponder device (36) operates on the RFID (radio frequency identification) principle.

3. The detection system as claimed in claim 1, wherein two or more transponder devices (36) are inserted at different wear state positions in the machine part (16), and their respective destruction is a measure of the wear state of the machine part (16).

4. The detection system as claimed in claim 1, wherein the depression, with the transponder device (36) located in it, is filled with synthetic resin (35).

5. The detection system as claimed in claim 4, wherein the synthetic resin (35) has non-metallic filling particles added to it, preferably composed of ceramic.

6. The detection system as claimed in claim 1, wherein the machine part is a rotating component (16), and between 2 and 10 transponder devices (36) are arranged distributed on the circumference, at different radial distances from the rotation point.

7. The detection system as claimed in claim 1, wherein the transponder devices (36) have different identification signals, in order to distinguish between them.

8. The detection system as claimed in claim 1, wherein the machine part is a stamp press.

9. The detection system as claimed in claim 1, wherein the rotating machine part is a worm feed (16) or a worm press.

10. The detection system as claimed in claim 1, wherein the detection system is used in a residual material compression apparatus (10), with two or more radial depressions being incorporated on the external circumference of the worm (16).