Textile product having an integrated sensor for measuring pressure and temperature

• US 20050109587A1
• Filed: 08/13/2004
• Published: 05/26/2005
• Est. Priority Date: 08/13/2003
• Status: Active Grant

• Current Assignee: Heimbach GmbH (Albany International Corporation)
• Original Assignee: Heimbach GmbH (Albany International Corporation)
• Inventors: Gerundt, Sebastian, Best, Walter
• Granted Patent: US 7,276,137 B2
• Time in Patent Office: Days
• US Class Current: 198/810.10
• CPC Class Codes: D21F 1/0027 Screen-cloths
• CPC Class Codes: D21F 7/08 Felts
• CPC Class Codes: G01L 1/16 using properties of piezoelectric devices
• CPC Class Codes: H10N 30/302 Sensors
• CPC Class Codes: Y10S 162/90 Papermaking press felts
• CPC Class Codes: Y10S 162/902 Woven fabric for papermaking drier section
• CPC Class Codes: Y10S 162/903 Paper forming member, e.g. fourdrinier, sheet forming member

Abstract

The invention concerns a textile product (6) for use in a paper machine, having a monofilament or a profiled structure as support element (1) on which is arranged a layered sensor for measuring pressure and/or temperature, and is characterized in that the sensor is constituted from at least three layers (2, 3, 4), the second layer (3) having piezoelectric properties and the layers (2, 4) in contact against the second layer (3) forming electrodes that are couplable or coupled to an analysis device. The invention further concerns a method for producing such a textile product.

Claims

1. A textile product (6) for use in a paper machine, having a monofilament or a profiled structure as support element (1) on which is arranged a layered sensor for measuring pressure and/or temperature,

wherein the sensor is constituted from at least three layers (2, 3, 4), the second layer (3) having piezoelectric properties and the layers (2, 4) in contact against the second layer (3) forming electrodes that are couplable or coupled to an analysis device.

2. The textile product as defined in claim 1, wherein the second layer (3) is polarized.

3. The textile product as defined in claim 1 wherein the thickness of the second layer (3) is 10 μ

m to 50 μ

m.

4. The textile product as defined in claim 1, wherein the second layer (3) is constituted from a polyvinylidene fluoride copolymer.

5. The textile product as defined in claim 1, wherein the layers (2, 4) in contact against the second layer (3) are constituted by surface metallization.

6. The textile product as defined in claim 1, wherein one or both of the layers (2, 4) in contact against the second layer (3) are interrupted in certain segments.

7. The textile product as defined in claim 6, wherein where only one of the layers (2, 4) is interrupted, the other continues to function as the ground electrode.

8. The textile product as defined in claim 1, wherein a further layer (5) in the form of an electrically insulating and/or moisture-insulating layer is arranged on the support element (1).

9. The textile product as defined in claim 1, wherein an analysis device is arranged, in addition to the sensor, on the support element (1).

10. The textile product as defined in claim 1, wherein in a context of dynamic loading, the analysis device is operable by way of the current generated at the sensor.

11. The textile product as defined in claim 1, wherein the support element (1) is a monofilament that is arranged on the textile product or an extruded profiled structure, extruded in particular in the form of strips, that is arranged on the textile product.

12. The textile product as defined in claim 1, wherein the support element (1) has a round, flat, or rectangular cross section.

13. The textile product as defined in claim 1, wherein the support element (1) is incorporated in the longitudinal and/or transverse direction of the textile product.

14. The textile product as defined in claim 1, wherein the sensor layers at least partially surround the surface of the support element (1).

15. The textile product as defined in claim 1, wherein the analysis device encompasses a signal processing electronics system and/or transmission electronics system.

16. The textile product as defined in claim 15, wherein the signal processing electronics system comprises at least one transistor having an organic semiconductor, or one transistor manufactured by means of semiconductor technology.

17. The textile product as defined in claim 15, wherein the transmission electronics system is embodied as an RFID tag or SW component.

18. The textile product as defined in claim 1, wherein the static and dynamic measurement of pressure and/or temperature is read out by means of ideal voltage measurement.

19. A method for producing a textile product as defined in claim 1,

wherein in a first step a metallization layer (2) is arranged on a support element (1), in a further step there is arranged above the metallization layer (2) a lacquer layer (3) having piezoelectric properties that is polarized in a next step, and in a further step a further metallization layer (4) is arranged above the layer (3) having piezoelectric properties.

20. The method as defined in claim 19, wherein in a further step, an electrically insulating and/or moisture-insulating layer (5) is arranged on the support element (1).

21. The method as defined in claim 19, wherein in a further step, an analysis electronics system according to any of the foregoing claims is additionally arranged on the support element (1).

22. The method of monitoring a preselected parameter of a paper machine clothing operating in a paper-making machine, comprising the steps of:

a) providing a paper machine clothing having a piezoelectric sensor incorporated into the clothing, the sensor including a wireless transmitter;

b) operating the clothing in a paper-making machine and thereby subjecting the clothing to a load acting upon the sensor;

c) sensing with the sensor in response to the applied load the preselected parameter;

d) transmitting with the transmitter a signal indicative of the preselected parameter; and

e) analyzing the signal and thereby monitoring the preselected parameter.