Device and method for recording contaminations in a hydraulic system
First Claim
1. A contamination recording apparatus for recording contaminations in a hydraulic fluid to be examined flowing in a hydraulic system of an aircraft, having at least one conveying device, integratable in the hydraulic system, for conveying the flowing hydraulic fluid, having at least one light source for exposing the hydraulic fluid flowing in the conveying device to light, and having at least one detection device for recording a fraction of the light absorbed by the exposed hydraulic fluid, the at least one light source being formed in order to emit light having a wavelength in a near-infrared range;
- wherein at least one first light source is formed in order to expose the hydraulic fluid to light in a wavelength range of alcohol absorptions from 2020 nm to 2075 nm, and at least one second light source is formed in order to expose the hydraulic fluid to light in a wavelength range of water absorptions from 1880 nm to 2000 nm, and at least one third light source is formed in order to expose the hydraulic fluid to light in a reference wavelength range in which neither alcohol absorptions nor water absorptions occur from 1820 nm to 1840 nm, and a detection device is assigned to each light source, andwherein the apparatus is configured to use recorded absorptions in the reference wavelength range for normalizing recorded absorptions in the other wavelength ranges, andwherein each of the at least one first, second and third light source is respectively assigned to a separate detection device which is arranged opposite the respective light source on the conveying device.
1 Assignment
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Accused Products
Abstract
The invention relates to a contamination recording apparatus (12) for recording contaminations in a flowing hydraulic fluid (10) to be examined in aircraft (11a), which comprises a conveying device (14) for conveying the flowing hydraulic fluid (10), a light source (34) for exposing the hydraulic fluid (10) flowing in the conveying device (14) to light (46), and a detection device (36) for recording a fraction of the light (46) absorbed by the exposed hydraulic fluid (10), the light source (34) being formed in order to emit light (46) having a wavelength in the near-infrared range. The invention furthermore relates to a hydraulic system (11) equipped with such a contamination recording apparatus (12) and to an aircraft (11a), and also to a method for recording contaminations in a hydraulic fluid (10) flowing in a hydraulic system (11) of an aircraft (11a).
32 Citations
11 Claims
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1. A contamination recording apparatus for recording contaminations in a hydraulic fluid to be examined flowing in a hydraulic system of an aircraft, having at least one conveying device, integratable in the hydraulic system, for conveying the flowing hydraulic fluid, having at least one light source for exposing the hydraulic fluid flowing in the conveying device to light, and having at least one detection device for recording a fraction of the light absorbed by the exposed hydraulic fluid, the at least one light source being formed in order to emit light having a wavelength in a near-infrared range;
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wherein at least one first light source is formed in order to expose the hydraulic fluid to light in a wavelength range of alcohol absorptions from 2020 nm to 2075 nm, and at least one second light source is formed in order to expose the hydraulic fluid to light in a wavelength range of water absorptions from 1880 nm to 2000 nm, and at least one third light source is formed in order to expose the hydraulic fluid to light in a reference wavelength range in which neither alcohol absorptions nor water absorptions occur from 1820 nm to 1840 nm, and a detection device is assigned to each light source, and wherein the apparatus is configured to use recorded absorptions in the reference wavelength range for normalizing recorded absorptions in the other wavelength ranges, and wherein each of the at least one first, second and third light source is respectively assigned to a separate detection device which is arranged opposite the respective light source on the conveying device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for recording contaminations in a hydraulic fluid flowing in a hydraulic system of an aircraft, comprising:
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a) providing at least one hydraulic fluid line for conveying the hydraulic fluid in the hydraulic system; b) coupling a contamination recording apparatus which comprises a conveying device for conveying the flowing hydraulic fluid, a light source for exposing the hydraulic fluid flowing in the conveying device to light, and a detection device for recording a fraction of the light absorbed by the exposed hydraulic fluid; c) exposing the flowing hydraulic fluid to light having a wavelength in a near-infrared range; d) recording a fraction of the light absorbed by the exposed hydraulic fluid; e) repeating steps a) to d) and comparing the absorbed light fractions; wherein the absorbed fraction of the light in a range of alcohol absorptions, in a wavelength range from 2020 nm to 2075 nm, and in a range of water absorptions, in a wavelength range from 1880 nm to 2000 nm, and in a reference range, in a wavelength range from 1820 nm to 1840 nm, is recorded; wherein the hydraulic fluid flowing in the conveying device is exposed by at least a first light source that emits light in the wavelength range from 2020 nm to 2075 nm, a second light source that emits light in the wavelength range from 1880 nm to 2000 nm and a third light source that emits light in the wavelength range from 1820 nm to 1840 nm;
wherein each of the at least one first, second and third light source is respectively assigned to a separate detection device which is arranged opposite the respective light source on the conveying device; andwherein the recorded absorbed fractions in the reference range are used for normalizing the recorded absorbed fractions in the other ranges. - View Dependent Claims (10, 11)
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Specification