Mantex AB Patent applications |
Patent application number | Title | Published |
20130195243 | METHOD AND APPARATUS FOR ESTIMATING THE ASH CONTENT OF A BIOLOGICAL MATERIAL - A method for measuring ash content in a biological material in an automated or semi-automated procedure is disclosed. The method includes the steps of scanning the biological material with electromagnetic radiation of at least two different energy levels, determining the amount of radiation transmitted through the sample of the biological material at the energy levels and estimating the moisture content in the biological material based on a relationship between the determined amount of radiation transmitted through the biological material. Thereafter, the ash content in the biological material is estimated, based on the estimated moisture content in the biological material, and average attenuation coefficients for the biological material without moisture, attenuation coefficients for a combustible part of the biological material and attenuation coefficients for ash of the biological material at the energy levels. A corresponding apparatus is also disclosed. | 08-01-2013 |
20130036831 | METHOD AND APPARATUS FOR ESTIMATING THE DRY MASS FLOW RATE OF A BIOLOGICAL MATERIAL - A method and an apparatus for measuring dry mass flow rate for a biological material.—The method steps include conveying the biological material through a measuring station, scanning the biological material with electromagnetic radiation of at least two different energy levels, determining the amount of radiation transmitted through the biological material at said two energy levels, and summing, for each of sad two energy levels, the radiation transmission values over a time frame to summed radiation transmission values. Further, a wet dry mass flow rate is estimated based on the summed radiation transmission values for said two energy level. The moisture content of the biological material is estimated based on the amounts of radiation transmitted through the biological material. The estimated wet dry mass flow rate is scaled in accordance with the estimated moisture content of the biological material, thereby providing an estimate of the dry mass flow rate. | 02-14-2013 |
20130003925 | DETECTION OF AN ANOMALY IN A BIOLOGICAL MATERIAL - A method for detecting an anomaly in a biological material is disclosed, including the steps of: irradiating the biological material with electromagnetic radiation of at least two different energy levels; measuring the amount of radiation transmitted through the biological material; and determining, for each energy level, a transmission value. Before or after irradiation of the biological material, a reference material of a predetermined thickness is irradiated and the amount of radiation transmitted is determined. For each energy level, a transmission calibration reference value is determined and a calibrated transmission value is determined for the biological material and the calibration reference. A material value based on a relationship between the calibrated transmission value and the presence of an anomaly in the biological material is determined by comparing the determined and expected material values for the biological material. A corresponding apparatus is also disclosed. | 01-03-2013 |
20110176658 | METHOD AND APPARATUS FOR MEASURING MOISTURE CONTENT IN A BIOLOGICAL MATERIAL - A method for measuring moisture content in a biological material in an automated procedure is disclosed. The method comprises the step of: providing a reference database for a plurality of different material types with known moisture content. Further, a sample of biological material, such as chips of wood, pulp, grain, crop or sugar canes, are scanned with electromagnetic radiation of at least two different energy levels and the amount of radiation transmitted through the sample of the biological material is determined at said two energy levels. Subsequently, a material type in the reference database most resembling the biological material of the biological material of the sample is identified, and the moisture content of the sample of biological material is determined based on the identified material type and the determined amounts of radiation transmitted through the sample. | 07-21-2011 |