• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Anordningsarrangemang för bildning av ett mätparti av kros-sat material eller flis. Anordningsarrangemanget omfattar samlingskärl är anordnad: att samla material somfaller i dett; som ett mätparti. Samlingskärlesflt-fi .~__omfattar ensamlingsdel är öppen ovanifrän och pa undersidan,och i vilken materialet som faller ner kan samlas.Samiingskärleïuífiguræ omfattar ett pä botten av samlingsdelen ____ __placerat spärrdon är anordnat att stängasamlingsdelen _för tiden av insamlingen och att öppnasamlingsdelen när mätpartiet avlägsnas frän .;.ïl.a“.“....- samlingsdelen att det kan falla ned ur samlingsdelen 1 I ett exempel omfattar anordningsarrangemanget ett päneutronmetoden baserad mätdon _____för mätning avfukthalten pä mätpartiet i samlingsdelen__:,t-~ë. Förfarandet för .“2l. bildning av ett mätparti av material i form av krossat materialeller flis utnyttjar sagda anordningsarrangemang. Fig. 4
    公开号:SE538537C2
    申请号:SE1450456
    申请日:2014-04-14
    公开日:2016-09-13
    发明作者:Viik Heli；Silmu Riikka
    申请人:Upm-Kymmene Corp；
    IPC主号:
    专利说明:

    FIELD OF THE INVENTION Object of the Invention The invention relates to a device arrangement for forming a measuring portion of crushed material or chips. The invention also relates to a method for forming a measuring portion of crushed material or chips.
    Background of the invention Wood raw material in the form of crushed material or chips is used as e.g. forest fuel. Forest fuels, such as felling waste, hardwood and stumps or stumps, are crushed or chipped at the place of use in a power plant or delivered in the form of finished crushed material or chips to the power plant. Alternatively, forest fuels are crushed or chipped at the site where the felling waste is collected or the stumps are lifted, in a storage of forest fuel or in facilities for pre-treatment of forest fuel.
    The moisture content is of great importance for the calorific value of the wood raw material that is to be used as forest fuel, which calorific value is used as a basis for, for example, the pricing of the forest fuel. Nowadays, the measurement of the moisture content in forest fuels is based on e.g. sampling and a peripheral kiln drying process per se. It is typical to take several samples of a load and make a mixed sample of these and other samples of loads from the same supplier on the same day, from which mixed sample a value is determined for the moisture content at the end of the day. The process described above for forming a measuring portion is unnecessarily multiphase and slow, with a high risk of errors in sampling, the seam material is inhomogeneous and the moisture is possibly unevenly distributed. lnex accuracy in a moisture content measurement that is based on mixed samples can cause errors in e.g. the determination of a calorific value that can be used i.a. as a basis for pricing.
    For wood raw materials in the form of wood chips, a measuring system has been developed for on-line measurement, ie. for continuous moisture content measurement, which does not require sampling unless mounted on a conveyor that transports crushed material or chips past the measurement system. The measuring system is also suitable for icy wood raw material. Said measuring system applies a neutron absorption method known per se, which is also called a neutron method. This is a method for radiometric measurement of the moisture content, which can also be a so-called combined measurement, as the neutron method usually involves density compensation by using gamma radiation, which improves the measurement result. In the neutron method, either thermal, slow neutrons or fast neutrons are detected, on the basis of which the moisture content of the material can be estimated.
    Measurement methods according to the prior art, e.g. the neutron method, is presented i.a. in the publication "State of art - selvitys puun kostusmittauksesta", Järvi-nen T. et al., Tutkimusraportti, Nro Vl I-R-013325-07, VTT, 2007-05-08.
    The above-mentioned publication also highlights the applicability of the neutron method for measuring the moisture content of chips, e.g. in a silo. For measuring the moisture content of bulk material in a silo, there are known measuring systems, where sensors can be placed in the middle of the bulk material in a silo magazine or attached to the outer surface of the silo magazine, or placed outside the silo magazine, where sensor measures properties of the bulk material within the silo magazine.
    However, the measurement of the moisture content of the crushed material or chips stored in the silo does not describe in detail the moisture content of an individual batch of crushed material or chips which is fed into the silo magazine.
    Brief Summary of the Invention The inventive solution for a device arrangement for forming a measuring portion of crushed material or chips is presented in claim 1. The solution according to the invention for a method for forming a measuring portion of crushed material or chips is presented in claim 13.
    The presented solution for the device arrangement or method enables in particular the measurement of the moisture content in crushed material or wood chip wood material. The presented solution enables the on-line measurement of the dehumidification content in forest fuels, e.g. upon receipt at power plants. The presented solution enables cost-effective measurement even if the crushed material or chips were inhomogeneous and contained ice or snow in the winter.
    The presented solution is suitable for use e.g. in conjunction with silos, for measuring the moisture content of a batch of crushed material or chips, and replacing known measuring systems which are placed on a conveyor.
    The solution presented is particularly suitable for the formation of a single batch of crushed material or chips. The solution presented enables in particular the measurement of the moisture content in the batch. The measurement does not refer to, for example, the amount of dentotal material in the silo magazine, but smaller parts that are measured at the front are placed in the silo magazine. For said measurement, a collecting vessel can be used which is considerably smaller than the silo magazine and in which the material is measured faster than in the silo magazine. Individual batches of crushed material or chips are collected in the collection vessels for measurement one at a time; ie several measuring portions are formed.
    The device arrangement according to the presented solution forms a measuring portion of material which is in the form of crushed material or chips. The device arrangement comprises a collecting vessel arranged for collecting material falling into it in the form of a measuring portion, and to hand over the collected measuring portion by dropping said measuring portion down from the collecting vessels. The collecting vessels comprise a collecting part which is open from above and on the underside, and in which the material falling down can be collected as a measuring portion. At the bottom of the collecting part is placed a locking device which is arranged to close the collecting part when the material is collected in the collecting part, and further to open the collecting part when the measuring portion is removed from the collecting part by dropping it out of the collecting part.
    The presented solution is particularly well suited for measuring devices and methods intended for moisture content measurements.
    The collection vessels enable on-line measurement. The collection vessels are easy to place, as falling material flows occur in places for handling crushed material or chips, e.g. in connection with conveyors for crushed material or chips, or when receiving at power plants. It is easy to install a measuring device in the collecting vessels, and with the help of it several measurements can be made for the material in the same load without causing extra steps in the handling of the material. The device arrangement can t.o.m. is designed as a movable device that enables measurements of the moisture content in varying positions.
    The collecting vessels use gravity in both receiving and removing the material, which makes the construction easier. According to an example, the material which falls down can also be released through the collecting vessels and its collecting part and further out of the collecting vessels, when the locking device is open.
    According to one example, the collecting vessels comprise a support structure, with which the collecting vessels can be transferred from below and back under the material falling, to form a measuring portion. An advantage of this example is that the collecting vessels can be transferred away from the material stream when it is not in use, or the time period for measuring a measuring portion can be extended, since material is not dropped into the collecting part.
    According to a variant, the device arrangement further comprises one or more actuators which are connected to the locking device for opening and closing it, together with an electronic control device for its control. The control device is arranged to close the locking device for collecting a measuring portion in the collecting part. The control device opens the locking device for removing the ifr. the measuring portion from the collecting part and the collecting vessels. The control unit closes the locking device e.g. at predetermined intervals or at the requested time, depending on e.g. signals from various measuring devices.
    According to an example, the device arrangement further comprises a measuring device for measuring the level of the material collected in the collecting part. According to one example, the device arrangement further comprises a measuring device for measuring the weight of the material collected in the collecting part.
    The level meter enables monitoring to prevent overfilling of the collection vessels, and / or an estimate of the amount of material in the collection vessels. A measuring device for weight helps in determining the density of the material.
    The controller is connected to the level meter e.g. so that the control device opens the locking device according to the level of the material has reached a predetermined height.
    According to an example, the device arrangement further comprises a measuring device which is based on the neutron method and with which the moisture content of the measuring portion of the collecting part is measured. The measuring device comprises a sensor which is placed inside the collection vessels, outside the collection vessels or attached to the outer surface of the collection vessels.
    The collecting vessels enable easy and simple placement of the sensor of the measuring device, pre-measuring of a measuring portion in the collecting vessels.
    According to a variant, the collecting vessels are placed in the falling material stream so that at least a part of the material stream or the entire material stream passes through the collecting part.
    According to a second variant, the collecting vessels are placed above a silo magazine storage of material in the form of crushed material or chips. The collecting part is arranged to receive incoming material falling from a conveyor and to drop the material down to the silo magazine.
    According to a third variant, the collecting vessels are placed so that the collecting part is arranged to receive incoming material falling from the conveyor and to release material down from the collecting part.
    Preferably, the shape of the manifold follows the shape of a cylinder, to prevent arching of the material and blockage of the manifold.
    In the method according to the presented solution, a measuring portion of material is formed in the form of crushed material or chips. In said method, falling material is collected by using a device arrangement comprising the collecting vessels described above with a collecting part and a locking device. It is typical in the method that the collecting part is finally opened by opening the latch after collecting the measuring portion, and the measuring portion is removed from the collecting part by lowering.
    According to a further example of the method, the moisture content of the measuring portion of the collecting part is measured by using a measuring device which is based on the neutron method. The measuring device comprises a sensor that is placed inside the collection vessels, outside the collection vessels or attached to the outer surface of the collection vessels.
    According to a further example of the method, the level of the material in the collection part is measured during the collection by using a level meter. The above-mentioned measurement of the moisture content is performed after the level has reached a predetermined height.
    According to a further example of the method, the barrier device and measuring device are controlled for the moisture content with an electronic control device which is arranged to time the mutual function of the barrier device and the measuring device for performing the measurement of the moisture content on-line. In the variants and examples presented above which relate to the device arrangement and the method, the material is preferably wood raw material which is wood chips or alternatively cellulose chips, which is more homogeneous than wood chips.
    In this description, wood chips mean e.g. wood chips and crushed material made from wood obtained from forests, in which case it is a question of e.g. fuel chips and crushed solid fuel made from unprocessed wood obtained directly from forest. Raw materials for wood chips may also include logs, twigs, logs and twigs as well as conifers and leaves in these, whereby all tree biomass above ground is utilized. Raw materials for wood chips also include stumps and rhizomes, and also stumps obtained from the surface of a peat moss. Raw materials also include twigs and crowns that have remained from the operation of utility timber, incl. conifers and leaves in them, or rice sticks formed from these.
    In this description, cellulose chips mean e.g. chips, in which the wood raw material is as fresh and well debarked as possible, and homogeneous chips of softwood and hardwood that have been chipped and sieved to a predetermined size.
    Description of the drawings Figure 1 shows an example of a device arrangement and in particular its collecting vessel which is in accordance with the presented solution, seen in a single cross-sectional view from the side.
    Figure 2 shows the example of figure 1 seen from above.
    Figure 3 shows a second example of the device arrangement with its collecting vessels according to the presented solution, in a principle cross-sectional view of the collecting vessels seen from the side.
    Figure 4 shows a third example of a device arrangement and in particular its collection vessel which is in accordance with the presented solution, in a cross-sectional view with collection silo seen from the side.
    Description of the invention in detail Figure 1 shows a collecting vessel 1 of a device arrangement according to the presented solution, comprising a collecting part 2 and a locking device 3. The collecting part 2 can collect crushed material or chips falling into it. For crushed material or chips is used in this description also term material.
    The collecting part 1 is according to an example a cylinder, e.g. a circular cylinder comprising e.g. a flat or continuous inner surface. The cross section of the cylinder inside is e.g. essentially circular or slightly oval. Regardless of the shape of the cross-section of the inner side of the collecting part 2, it is preferably the case that the horizontal diameter A of the inner side becomes substantially constant or increases when the collecting part is viewed from top to bottom. Preferably, the horizontal cross-sectional area on the inside of the joint part 2 becomes substantially constant or increases the alignment of the joint part 2 from top to bottom. In this case, the collecting part 2 is considered in the position of use according to Figure 1, in which the longitudinal direction X of the collecting part is upright. The purpose of the cross-sectional shape of the inside of the collecting part 2 is to prevent arching of the crushed material or chips.
    In some examples, the geometric cross-sectional shape of the inside of the joint 2 differs particularly clearly from the downwardly tapered shape which is, for example, the shape of an upside-down cone. The shape of the assembly part follows the shape of e.g. a cone that widens downwards, or a straight cone, or a cylinder, or a straight cylinder, or a circular cylinder. The horizontal cross-section of a single cylinder or cone can also be polygonal. The shape can also be a combination of the shapes of a cylinder and a cone which becomes wider downwards, so that said cross-sectional area becomes substantially constant or increases in the direction of the collecting part 2 from top to bottom. The assembly part is tubular and open at the ends.
    The jacket of the collecting part 2 is preferably completely covered. The collecting part 2 can be provided with other parts and structures, but with regard to their shape and placement it must be taken into account that the arching of the collected material is prevented, that the dropping of the material in the collecting part 2 is not prevented or accumulation of material elsewhere than in the collecting part as possible, and that the collecting vessels 1 should not be blocked. At least the collecting part 2 and its inner side, in which material moisture measurement is collected, follows in its form what is described above. The shape of the collecting part 2 follows the shape described above at least in the part which is in contact with the material when the material is accumulated in the collecting part 2 and constitutes a measuring portion. It is especially a question of the lower part of the collecting part 2 from the locking device 3 upwards.
    According to an example, the volume of the collection part 2 is at least 1 m3, which also applies to the measurement method used. The collection part is filled e.g. every 30 sell less often.
    The locking device 3 is located on the bottom of the collecting part 2. The locking device 3 closes the collecting part 2 when material is collected. The detent 3 opens the collecting part 2 when material is removed from the collecting part 2 so that the material can be released from the collecting part 2. The locking device 3 preferably opens the bottom of the collecting part 2 and leaves no steps or planes extending to the cross-sectional area of the collecting part 2 or below the material. get stuck or accumulate.
    The locking device 3 consists of one or more parts which cover the bottom of the collecting part and hold the material in the collecting part 2. Said part is e.g. disc-shaped and forms a flat bottom for the assembly part. According to an example and figure 1, the locking device 3 is pivotally mounted on the collecting vessels 1, e.g. its collection part2.
    In Figure 1, the barrier device swings downwards and releases the measuring portion accumulated on the barrier device from sliding or falling down from the barrier device. One or more pivot shafts of the barrier device are located outside the collecting part 2. According to an example, the barrier device 3 and one or more parts of it are arranged to move the signing thing straight or rotatable in the horizontal direction. In one example, the locking device 3 is controlled to different positions by means of one or more actuators 6, e.g. a cylinder or an engine, according to figure 3. The actuator 6 is connected to the locking means by means of e.g. a joint or a shaft. The actuator is connected e.g. between the locking device and the collecting part.
    According to an example and figure 3, the device arrangement comprises an additional electronic control device 8 which controls the actuator 7. This is a programmable device which, with the aid of signals from measuring devices or different sensors, can control and time the function of measuring devices, actuators, actuators and other components belonging to the device arrangement. The controller 8 sends control signals or commands to other devices, and it can also be connected to a separate process monitoring system. The control device 8 closes and opens the locking device 3.
    According to an example, the device arrangement may further comprise a measuring device 7 for measuring or monitoring the level of the material collected in the collecting part 2. The measuring device 7 comprises a sensor which applies e.g. measurement methods which are known per se and which are based on e.g. capacitive or magnetostrictive measurement, pressure measurement, or use of ultrasound or radar. The measuring device 7 is connected to the control device 8 and states e.g. whether a predetermined amount of material, i.e. a measuring portion, has been collected or the level of the re-material is at such a height that the measurement of the moisture content can begin.
    According to an example, the device arrangement may further comprise a measuring device 12 for measuring or monitoring the weight of the material collected in the collecting part 2. The measuring device 12 comprises a sensor which applies e.g. measurement methods which are known per se and which are based on e.g. measuring forces or using a strain gauge. The measuring device 12 is in communication with the control device 8 and states e.g. the weight of the collected material or collection part contains a predetermined amount of it.
    The measuring device 12 can be placed in e.g. a support structure 13 which holds the collecting vessels and which is attached to the collecting vessels 1 and supports it. The construction 13 may comprise a joint, by means of which the collecting vessels 1 can be moved, e.g. in the horizontal direction, to and from the falling material stream containing crushed material or chips. The support structure 13 comprises e.g. actuators which control the movements of the support structure and which are controlled and monitored by the control device 8.
    According to an example, the collecting vessels 1 are moved in the falling material stream, when the measuring portion is collected or the collecting vessels 1 are emptied. The collecting vessels 1 are moved away from the falling material flow, when the measuring portion is measured or when the collecting vessels 1 are not in use.
    If necessary, the measurements described above can be combined with the aid of the control device 8. For example, on the basis of the weight and the amount, the density of the material can be obtained.
    According to a further example of the device arrangement, a measuring device 4 which is based on the neutron method known per se can be placed in it. collecting part 2. The measuring device 4 measures the moisture content of the material in the collecting part 2 by applying said measuring methods. The measuring device 4 comprises an associated sensor 5 which is located inside the collecting part 2 or outside the collecting part 2 or is attached to the outer surface of the collecting part 2, as in the example of figur3. In the situation of figure 4, material is not collected, but the material is dropped down the collecting part 2 or it is passed through the collecting part 2. To perform the measurement, the barrier device 3 is closed and material is collected according to figure 3 and the collecting part 2 is filled with material.
    According to an example and figure 3, the measuring device 4 can be connected to the control device 8. The measuring device 4 transmits measuring signals to the control device. According to one example, the measuring device transmits measuring signals to a more comprehensive process monitoring system either directly or through the control device 8.
    According to a variant, which is also shown in figure 4, according to the device arrangement, the presented solution is placed in a falling material stream 11 which contains crushed material or chips. The crushed material or chipped bulk material consisting of individual, multi-shaped pieces. The material stream preferably consists entirely of crushed material or chips, and it does not contain e.g. so much liquid that the crushed material or chips would move forward with the liquid. At least a part of the material stream 11 passes through the collecting part 2. Preferably, the material flowing material 11 passes in its entirety through the collecting part 2, according to the example of
    According to a second variant, which is also shown in figure 4, the collecting vessels 1 are placed above a silo magazine 10 for the material. The collecting part 2 receives incoming material falling from a conveyor 9, and further the dropper collecting part 2 the material down to the silo magazine 10, e.g. after a moisture content measurement. When the measurement is not in use or there is a pause, the barrier device 3 is open and the material flow 11 passes through the collecting part 2.
    As the silo magazine 10 can be used per se known silos which are intended for storage of crushed material or chips, above which the presented device arrangement is located. As the conveyor 9, known conveyors which are intended for transporting crushed material or chips, such as belts, scoops or scrap conveyors, under which the presented device arrangement is placed can be used.
    According to a third variant which is also shown in figure 4, the collecting part 2 of the collecting vessels 1 receives incoming material which falls from the conveyor 9 and drags the material down from the collecting part 2. Alternatively, the material is transferred by 12 to the silo magazine 10, a storage container, a second conveyor, a crushing or chipping device, or a screening device.
    The method according to the presented solution for measuring the moisture content of crushed material or chips applies the device arrangement presented above. The procedure works as follows.
    Crushed material or chips that fall are collected by using the above-described device arrangement which comprises at least one collecting vessel and one locking device, which is closed. Materials are collected in a predetermined amount or during a predetermined time, or during a predetermined delay, to form a requested measuring portion. After collection, the moisture content of the material in the collection section is measured by using a measuring device based on the neutron method. Then the collecting part is opened by opening the locking device, and the material is removed by dropping it out of the collecting part.
    According to a further example, the level of the material in the collection part is measured by the sub-collection by using a level meter. With the help of the level measurement, you can find out the amount of material in the collection part or monitor the level of the material to prevent overfilling. The above-mentioned measurement of the moisture content is performed after the level has reached a predetermined height. According to a variant, the weight of the collected material is also determined by using some measuring device.
    According to a variant, the barrier device and the measuring device for the moisture content are controlled by an electronic control device which controls and times the mutual function of the barrier device and the measuring device for performing the measurement of the moisture content on-line.
    In one example, the control unit closes the locking device at predetermined intervals to collect a predetermined portion of crushed material or chips in the assembly part. After the measurement, the control device directs the locking device to an open position and removed portion from the assembly part and the collection vessels. Alternatively, a measuring device which is intended for measuring the level of the material or for determining its weight is used in assembling said measuring portion. According to a variant, material is collected from a falling material flow which consists of crushed material or chips. The material flow goes either partially or in its entirety through the collection part.
    The invention is not limited only to the examples, embodiments and variants presented in the figures or above, and they should not be construed as limiting alternatives. The figures presented above should also not be construed as meaning that all the features shown in them would also appear in the solutions presented. The features presented above can be combined in the device arrangement and in its use.
    The invention can be applied to the extent defined in the appended patent claims.
    权利要求:
    Claims (16)
    [1]
    Device arrangement for forming a measuring portion of material in the form of crushed material or chips, which arrangement arrangement comprises a collecting vessel which is arranged for collecting measuring portion in the falling material in the form of, and to hand over the collected measuring portion by releasing said measuring portion down from the collecting vessels, and which collecting vessel comprises: - a collecting part which is open from above and on the underside, and in which the material falling down can be collected in the form of a measuring portion, and - a barrier placed at the bottom of the collecting part which is arranged to close the collecting part when collecting material in the collecting part, and further to open the collecting part when the measuring portion is removed from the collecting part so that it can fall down from the collecting part.
    [2]
    Device arrangement according to claim 1, wherein the material which falls down can also fall through the collecting vessels and its collecting part and further out of the collecting vessels, when the locking device is open.
    [3]
    Device arrangement according to claim 1 or 2, wherein the collecting vessels comprise a support structure, by means of which the collecting vessels can be transferred from below and back under the material falling, to form the measuring portion.
    [4]
    Device arrangement according to any one of claims 1-3, further comprising: - one or more actuators connected to the locking device for opening and closing it, - an electronic control device for controlling the steel device, which control device is arranged to close the locking device for collection. of a measuring portion in the assembly part and to open the locking device for removal of it ifr. the measuring portion of the collection part and the collection vessels.
    [5]
    Device arrangement according to any one of claims 14, further comprising a measuring device for measuring the level of the material collected in the collecting part.
    [6]
    Device arrangement according to any one of claims 1-5, further comprising a measuring device for measuring the weight of the material collected in the collecting part.
    [7]
    Device arrangement according to any one of claims 1-6, further comprising a measuring device based on the neutron method for measuring the moisture content in a measuring portion in the collecting part, which measuring device comprises a sensor which is placed in the collecting vessels, outside the collection vessels or attached to the outer surface of the collection vessels.
    [8]
    Device arrangement according to any one of claims 1-7, wherein the shape of the collecting part follows the shape of a cylinder or a cone which becomes wider.
    [9]
    Device arrangement according to any one of claims 1-8, wherein the collecting vessels are placed in the falling material stream so that at least a part of the material stream or the entire material stream passes through the collecting part.
    [10]
    Device arrangement according to any one of claims 1-8, wherein the collecting vessels are placed above a silo magazine for storing material in the form of crushed material or chips, the collecting part is arranged to receive incoming material falling from a conveyor and to release the material into the silo magazine.
    [11]
    Device arrangement according to any one of claims 1-8, wherein the collecting vessels are positioned so that the collecting part is arranged to receive incoming material falling from the conveyor and to drop material down the collecting part.
    [12]
    Device arrangement according to any one of claims 11-11, wherein the material is wood raw material, which is wood chips.
    [13]
    A method for forming a measuring portion of material in the form of crushed material or chips, in which method: 16 - falling material is collected by using a device arrangement comprising a collecting vessel which is arranged for collecting in falling material in the form of a measuring portion, and to hand over the collected measuring portion by dropping said measuring portion down from the collecting vessels, and which collecting vessel comprises a collecting part which is open from above and on the underside, and in which the falling material can be collected in the form of a measuring portion, and a barrier arranged at the bottom of the collecting part. the collecting part when the material is collected in the collecting part, and further to open the collecting part local material is removed from the collecting part so that it can fall down the collecting part.
    [14]
    A method according to claim 13, in which method further measures the moisture content of the measuring portion in the collecting part by using a neutron method-based measuring device for measuring the moisture content of a measuring portion in the collecting part, which measuring device comprises a sensor placed in the collecting vessels, the outer collecting vessels or attached .
    [15]
    A method according to claim 14, wherein in the method further: - the barrier device and the measuring device for the moisture content are controlled with an electronic control device which is arranged to time the mutual function of the barrier device and the measuring device for performing the measurement of the moisture content on-line.
    [16]
    A method according to any one of claims 13-15, in which method further: - material is collected from a material stream which falls either partially or in whole through the collecting part.
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    同族专利:
    公开号 | 公开日
    FI20135374A|2014-10-18|
    SE1450456A1|2014-10-18|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CN112462028B|2020-12-15|2021-07-06|电子科技大学|Method for estimating water content of 10-h dead combustible on forest ground surface|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FI20135374A|FI20135374A|2013-04-17|2013-04-17|Arrangement of apparatus for forming a measuring batch of crushed or chipped wood and method|
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