Measuring device and a measuring method for determining parameters of flat hygiene paper and textile-like or textile sheet materials
AssigneeEmtec Electronic GmbH
InventorGiselher Gruener
Life of this patent
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Abstract
The invention relates to a measuring device (100, 100′) for determining individual parameters of sheet materials, such as flat hygiene paper and flat, textile-like or textile materials. Methods are described for determining the individual parameters by means of the measuring device (100, 100′).
Claims19
A measuring device (100, 100′) for determining individual parameters of sheet materials, such as flat hygiene paper and flat, textile-like or textile materials, wherein the measuring device (100, 100′) comprises a measuring head (108A) and a measuring housing (108), wherein a scraper element (106) is arranged on the measuring head (108A), which element is movably arranged relative to a positionally fixed, at least single-layer sample (P) of the sheet material arranged on the measuring housing (108) and is arranged to be adjustable relative to the sample (P) according to a predetermined pressing force (F) acting on the sample (P), characterized in that a first microphone (116A) is arranged inside the measuring housing (108), which forms in its interior an enclosed measuring chamber (110) underneath the sample (P), and a second microphone (116B) is arranged outside the measuring housing (108), which together or independently of each other record noises produced by the relative movement of the scraper element (106) acting on the sample (P).
A method for determining individual parameters of sheet materials, such as flat hygiene paper and flat, textile-like or textile materials, by means of the measuring device (100, 100′), wherein in one method step (V-12) a movable scraper element (106) is moved in translation relative to a positionally fixed, at least single-layer sample (P) of the sheet material with a predeterminable pressing force (F) onto the sample (P), while simultaneously rotating said scraper element (106), and makes contact with and acts on said sample (P), whereby a noise is produced, received and recorded in a predetermined measuring period, characterized in that the vibrations generated are detected by means of a vibration analysis to determine a sound spectrum or a frequency band by a first microphone (116A) arranged inside a measuring housing (108), which forms in its interior an enclosed measuring chamber (110) underneath the sample (P), and by a second microphone (116B) arranged outside the measuring housing (108), wherein a specific softness (P1) and a specific roughness (P2) are assigned to the sheet material as individual parameters of the sample (P) of the sheet material by applying a calculation algorithm based on specific peaks determined in the sound spectrum or frequency band.
A method for determining individual parameters of sheet materials, such as flat hygiene paper and flat, textile-like or textile materials, by means of the measuring device (100, 100′), wherein in one method step (V-3) the scraper element (106) or a movable vibration element (150′) is moved in translation relative to a positionally fixed, at least single-layer sample (P) of the sheet material with a predeterminable pressing force (F) onto the sample (P) and makes contact with and acts on said sample (P), whereby a noise is produced, received and recorded in a predetermined measuring period, characterized in that, in the predetermined measuring period, a vibration generator (140) causes the scraper element (106) or the vibration element (150′) to vibrate, wherein the vibrations generated thereby on the sample side are detected by means of an additional vibration analysis to determine an additional sound spectrum or a frequency band by the first microphone arranged inside the measuring housing (108), which forms in its interior the enclosed measuring chamber (110) underneath the sample (P), wherein a detected specific peak and its position in the additional sound spectrum or frequency band is a variable the measure of which characterizes a porosity (P3) of the sheet material, wherein the variable is also determined using a calculation algorithm.
A method for determining individual parameters of sheet materials, such as flat hygiene paper and flat, textile-like or textile materials, by means of the measuring device (100, 100′), wherein in one method step (V-4) a movable scraper element (106) is moved in translation relative to a positionally fixed, at least single-layer sample (P) of the sheet material with a predeterminable pressing force (F) onto the sample (P), while simultaneously rotating the scraper element (106), and makes contact with and acts on said sample (P), characterized in that, during the generated rotational movement of the scraper element (106), in a predetermined measuring period, a current curve and/or a torque and/or a power consumption of a first motor (134) that causes the rotational movement is/are determined and recorded, so that, depending on the respective measurement result, a specific frictional force (P4) is indirectly derived as an individual parameter and assigned to the sample (P), which frictional force is generated by the contact between the sample (P) and the scraper element (106) during the rotational movement.
A method for determining individual parameters of sheet materials, such as flat hygiene paper and flat, textile-like or textile materials, by means of the measuring device (100), characterized in that, in one method step (V-5), a movable temperature generation and measuring device (106) is moved in translation relative to a positionally fixed, at least single-layer sample (P) of the sheet material with a predeterminable pressing force (F) onto the sample (P) and makes contact with and acts on a surface of said sample (P), wherein the sheet material is either heated to a specific predetermined temperature by means of the temperature generation and measuring device (106) in a predetermined measuring period and the temperature change of the sample (P) per unit of time is simultaneously recorded in the predetermined measuring period, or a specific heating current is applied to the temperature generation and measuring device (106A) for a predeterminable time, after which the temperature curve is determined during this time, so that, depending on the measurement results, a specific surface thermal conductivity (P5) is derived as an individual parameter and assigned to the sample (P).
A method for determining individual parameters of sheet materials, such as flat hygiene paper and flat, textile-like or textile materials, by means of the measuring device (100′), characterized in that, in one method step (V-5′), a specific heating current is applied to a movable temperature generation and measuring device (106A′) for a predeterminable time and the temperature generation and measuring device is then is moved in translation relative to a positionally fixed, at least single-layer sample (P) of the sheet material with a predeterminable pressing force (F) onto the sample (P) and makes contact with and acts on a surface of said sample (P) for a predeterminable time period, wherein the sheet material is heated to a specific predetermined temperature by means of the temperature generation and measuring device (106A′) in a predetermined measuring period and the temperature generation and measuring device (106A′) is then removed from the sample (P) so that contact is broken, after which a thermal imaging camera (106.1A′) is used to determine a temperature curve of the sheet material of the sample (P) so that, depending on the measurement results, a specific surface thermal conductivity (P5) is derived as an individual parameter and assigned to the sample (P).
A method for determining individual parameters of sheet materials, such as flat hygiene paper and flat, textile-like or textile materials, by means of the measuring device (100, 100′), characterized in that, in one method step (V-6), a movable temperature generation and measuring device (106A, 106A′) is moved in translation relative to a positionally fixed, at least single-layer sample (P) of the sheet material with a predeterminable pressing force (F) onto the sample (P) and makes contact with and acts on a surface of said sample (P), wherein the sheet material is heated to a specific predetermined temperature by means of the temperature generation and measuring device (106A, 106A′) in a predetermined measurement period, wherein a temperature sensor (142, 142′) is arranged underneath the sample (P), on a side of the sample (P) opposite the temperature generation and measuring device (106A, 16A′), at a predetermined distance from the sample (P), which temperature sensor detects a temperature, wherein the detected temperature is recorded and registered in a characteristic curve over time, so that, depending on the measurement results, a specific thermal insulation capacity (P6) is derived as an individual parameter and assigned to the sample (P).
A method for determining individual parameters of sheet materials, such as flat hygiene paper and flat, textile-like or textile materials, by means of the measuring device (100, 100′), wherein in one method step (V-7) a movable scraper element (106) is moved in translation relative to a positionally fixed, at least single-layer sample (P) of the sheet material with a predeterminable pressing force (F) onto the sample (P) and makes contact with and acts on said sample (P), characterized in that, in a predetermined measurement period, a displacement differential (Δs) covered by the scraper element (106) when pressing the scraper element (106) onto the sample (P) is determined and recorded, so that, depending on the measurement results, a specific lateral flexibility (P7) is derived as an individual parameter and assigned to the sample (P).
A method for determining individual parameters of sheet materials, such as flat hygiene paper and flat, textile-like or textile materials, by means of the measuring device (100, 100′), wherein in one method step (V-8) a movable scraper element (106) is moved in translation relative to a positionally fixed sample (P) of the sheet material with a predeterminable pressing force (F) onto the sample (P) and makes contact with and acts on said sample (P), characterized in that the pressing force (F) is a predetermined test force which moves the sample (P) from its rest position into a deflected deformation position in at least one measurement cycle, wherein, in the at least one measurement cycle, a speed at which the predetermined test force is to be reached is predetermined, wherein the sample (P) returns to its final deformation position or its original rest position at a predetermined relief time point in the at least one measurement cycle, at which relief time point the test force is withdrawn, wherein, in a predetermined measurement period of the measurement cycle, a displacement differential (Δs) covered by the sample (P) and a time period in which the sample (P) returns from the deflected deformation position to the final deformation position or the original rest position are determined and recorded, so that, depending on the measurement results, a resilience (P8) of the sample (P) is derived as an individual parameter and assigned to the sample (P), wherein furthermore a number of measurement cycles and/or the speed at which the sample (P) is deformed and/or the relief time point at which the test force is withdrawn and/or the test force, at which the resilience is determined, can be predetermined.
A method for determining individual parameters of sheet materials, such as flat hygiene paper and flat, textile-like or textile materials, by means of the measuring device (100, 100′), characterized in that, in one method step (V-9), the surface structure of the sample (P) is photographed by a high-resolution camera (138), so that visual image documentation (P9) of the sample (P) is available as an individual parameter, wherein further individual parameters are verified as a function of the photographic reproduction of the surface structure.
Dependencies are inferred from the claim text.