Corrosion detection apparatus for monitoring a state of corrosion

• US 9,097,745 B2
• Filed: 04/08/2011
• Issued: 08/04/2015
• Est. Priority Date: 04/14/2010
• Status: Active Grant

• Current Assignee: EADS Deutschland GmbH (Airbus SE)
• Original Assignee: EADS Deutschland GmbH (Airbus SE)
• Inventors: Steinwandel, Juergen, Hack, Theo, Heckenberger, Ulrike
• Primary Examiner(s): Nguyen, Hoai-An D
• Application Number:
  US13/640,931
• Publication Number:
  US 20130069676A1
• Time in Patent Office: 1,579 Days
• Field of Search: 324/700, 324/699, 324/693, 324/691, 324/649, 324/600
• US Class Current: 1/1
• CPC Class Codes: G01N 17/043 Coupons
• CPC Class Codes: G01R 27/02 Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant by measuring phase angle only G01R25/00

Abstract

A corrosion detection apparatus for permanently and integrally monitoring a state of corrosion of a component is provided. The corrosion detection apparatus makes it possible to use the change in electrical conductivity to detect corrosion of a component to be monitored. A corrosion-sensitive bridging element that establishes an electrical connection between a first electrical line section and a second electrical line section of a sensor circuit is used to change certain electrical properties of the sensor circuit. On account of the corrosion-sensitive property of the bridging element, the latter changes its electrical conductivity when corrosion starts. This makes it possible to use the sensor circuit to detect corrosion of the bridging element and thus of the component to be monitored.

Claims

1. A corrosion detection apparatus for permanently and integrally monitoring a state of corrosion of a component, wherein the corrosion detection apparatus comprises:

a sensor circuit configured to detect corrosion on the component, wherein the sensor circuit includes

a first electrical line section;

a second electrical line section; and

a corrosion-sensitive bridging element having a first end and a second end,

wherein, in a initial state, the first end is in electrical connection with the first line section and the second end is in contact with the second line section,

wherein the corrosions-sensitive bridging element has a first electrical conductivity in the initial state and a second electrical conductivity in a corrosion state such that the sensor circuit detects corrosion on the basis of the change from the first to the second electrical conductivity,

wherein the first electrical line section is a first electrode of a condenser and the second electrical line section is a second electrode of the condenser,

wherein the condenser is an interdigital condenser and the corrosion-sensitive bridging element is a thin layer between two electrodes of the interdigital condenser.

2. The corrosion detection apparatus according to claim 1, wherein the condenser is short-circuited in the initial state.

3. The corrosion detection apparatus according to claim 2, wherein the sensor circuit is an RFID resonant circuit.

4. The corrosion detection apparatus according to claim 3, wherein the RFID resonant circuit comprises:

an antenna configured to send and receive electromagnetic signals and an analog circuit with an electrical capacitance and an electrical inductivity,

wherein the corrosion-sensitive bridging element is configured to electrically bridge the RFID resonant circuit in the initial state.

5. The corrosion detection apparatus according to claim 4, wherein the sensor circuit is configured such that a read-out is possible selected from the group consisting of reverse phase reflecting of a field that is created by a read-out device, weaknesses of a field created by the read-out device, read-out by means of load modulation, and any combination thereof.

6. The corrosion detection apparatus according to claim 2, wherein the sensor circuit includes a plurality of parallel-connected corrosion-sensitive bridging elements, which are dimensioned in relation to each other such that they correspond to a preset characteristic of corrosion over time.

7. The corrosion detection apparatus according to claim 2, wherein the corrosion detection apparatus further comprises:

a read-out device configured to measure electrical properties of an apparatus comprising the first line section, the second line section and the corrosion-sensitive bridging element.

8. An aircraft, comprising:

a corrosion detection apparatus configured to permanently and integrally monitor a state of corrosion of a component, wherein the corrosion detection apparatus comprises

a sensor circuit configured to detect corrosion on the component, wherein the sensor circuit includes

a first electrical line section;

a second electrical line section; and

a corrosion-sensitive bridging element having a first end and a second end,

wherein, in a initial state, the first end is in electrical connection with the first line section and the second end is in contact with the second line section,

wherein the corrosions-sensitive bridging element has a first electrical conductivity in the initial state and a second electrical conductivity in a corrosion state such that the sensor circuit detects corrosion on the basis of the change from the first to the second electrical conductivity,

wherein the first electrical line section is a first electrode of a condenser and the second electrical line section is a second electrode of the condenser,

wherein the condenser is an interdigital condenser and the corrosion-sensitive bridging element is a thin layer between two electrodes of the interdigital condenser.

9. The aircraft according to claim 8, wherein the condenser is short-circuited in the initial state.

10. The aircraft according to claim 9, wherein the corrosion detection apparatus further comprises:

a read-out device configured to measure electrical properties of an apparatus comprising the first line section, the second line section and the corrosion-sensitive bridging element.

11. The aircraft according to claim 9, wherein the sensor circuit is an RFID resonant circuit.

12. The aircraft according to claim 11, wherein the RFID resonant circuit comprises:

an antenna configured to send and receive electromagnetic signals and an analog circuit with an electrical capacitance and an electrical inductivity,

wherein the corrosion-sensitive bridging element is configured to electrically bridge the RFID resonant circuit in the initial state.

13. The aircraft according to claim 12, wherein the sensor circuit is configured such that a read-out is possible selected from the group consisting of reverse phase reflecting of a field that is created by a read-out device, weaknesses of a field created by the read-out device, read-out by means of load modulation, and any combination thereof.

14. The aircraft according to claim 9, wherein the sensor circuit includes a plurality of parallel-connected corrosion-sensitive bridging elements, which are dimensioned in relation to each other such that they correspond to a preset characteristic of corrosion over time.