WO2023074497A1 - Dispositif de calcul de stock et procédé de calcul de stock - Google Patents

Dispositif de calcul de stock et procédé de calcul de stock Download PDF

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Publication number
WO2023074497A1
WO2023074497A1 PCT/JP2022/038931 JP2022038931W WO2023074497A1 WO 2023074497 A1 WO2023074497 A1 WO 2023074497A1 JP 2022038931 W JP2022038931 W JP 2022038931W WO 2023074497 A1 WO2023074497 A1 WO 2023074497A1
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WO
WIPO (PCT)
Prior art keywords
powder
distance
inventory
storage tank
inventory amount
Prior art date
Application number
PCT/JP2022/038931
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English (en)
Japanese (ja)
Inventor
憲吾 古澤
金姫 朴
啓介 小舟
信一 境田
俊和 松尾
Original Assignee
株式会社Ye Digital
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 株式会社Ye Digital filed Critical 株式会社Ye Digital
Publication of WO2023074497A1 publication Critical patent/WO2023074497A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
    • G01F11/28—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with stationary measuring chambers having constant volume during measurement
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/284—Electromagnetic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/284—Electromagnetic waves
    • G01F23/292—Light, e.g. infrared or ultraviolet

Definitions

  • the disclosed embodiment relates to an inventory amount calculation device and an inventory amount calculation method.
  • a storage tank is known as a storehouse for storing powders such as raw materials, products, grains, feed, etc., and has a cylindrical silo part and a funnel-shaped discharge part.
  • the powder stored in such a storage tank behaves like a fluid as an aggregate, although individual particles are solid. For this reason, it is known that the powder has a "mountain” surface shape as an aggregate when put into a tank, and changes to a "mortar” shape as it is discharged.
  • the length of this depression extends to the discharge port of the tank, and for this reason, there are cases where the powder is not discharged even though there is inventory, which is an operational issue. .
  • mash-type feed which is the most consumed in the livestock industry, tends to collapse during operation. It is mandatory, and it is a big burden for producers.
  • One aspect of the embodiment has been made in view of the above, and aims to provide an inventory amount calculation device and an inventory amount calculation method that can improve the accuracy of calculating the inventory amount.
  • An inventory quantity calculation device includes a first displacement gauge, a second displacement gauge, and a calculation unit.
  • the first displacement gauge is provided on the top of the storage tank so as to be able to vertically measure a first distance, which is the distance to the center of the surface of the powder contained in the storage tank, by means of measurement waves.
  • the second displacement meter is provided so as to be able to measure a second distance, which is a distance to the powder surface at a predetermined angle with respect to the vertical direction, by means of the measurement wave.
  • the calculation unit determines that the surface shape of the powder surface is a concave shape based on the measurement result of the first displacement gauge, the measurement result of the second displacement gauge, and the type of powder stored in the storage tank. Calculate the inventory quantity of the powder including the case.
  • FIG. 1 is a perspective view of a storage tank
  • FIG. FIG. 2 is a schematic sectional view (Part 1) of a storage tank containing powder.
  • FIG. 3 is a schematic cross-sectional view (2) of the storage tank containing powder.
  • FIG. 4 is a schematic explanatory diagram (Part 1) of the existing technology.
  • FIG. 5 is a schematic explanatory diagram (Part 2) of the existing technology.
  • FIG. 6 is a schematic sectional view (No. 3) of the storage tank containing the powder.
  • FIG. 7 is a diagram showing a configuration example of an inventory amount calculation system according to the embodiment.
  • FIG. 8 is a block diagram of the inventory amount calculation device according to the embodiment.
  • FIG. 9 is a diagram showing an example of powder-specific information.
  • FIG. 10 is an explanatory diagram of a calculation method when the powder has a mountain-like surface shape.
  • FIG. 11 is an explanatory diagram of the calculation method when the surface shape of the powder is mortar-shaped.
  • FIG. 12 is an explanatory diagram of the calculation method when the surface shape of the powder is a depressed shape.
  • FIG. 13 is an explanatory diagram of a method of determining the attachment angle of the second displacement gauge that measures the second distance.
  • FIG. 1 is a perspective view of a storage tank 10.
  • FIG. 1 is a perspective view of a storage tank 10.
  • the storage tank 10 has a silo portion 11, a funnel portion 12, and an upper surface portion 13.
  • the silo part 11 is formed in a cylindrical shape.
  • the funnel portion 12 is formed in a funnel shape and connected to the lower portion of the silo portion 11 .
  • a discharge port (not shown) is formed at the bottom of the funnel portion 12 .
  • a discharging device such as a vacuum feeder or a rotary feeder is usually connected to the discharge port, and the powder stored in the storage tank 10 is discharged as required.
  • the upper surface portion 13 is connected to the upper portion of the silo portion 11 and has an opening portion 13a.
  • the powder contained in the storage tank 10 is fed through the opening 13a by opening the hatch provided at the top of the tank.
  • the contained powder is conveyed to the next process of the line from the outlet at the bottom of the funnel 12 using a cutting device or the like based on the production plan.
  • FIG. 2 is a schematic cross-sectional view (part 1) of the storage tank 10 in which powder is stored.
  • FIG. 3 is a schematic cross-sectional view (No. 2) of the storage tank 10 in which powder is stored.
  • the powder contained in the storage tank 10 is solid as an individual particle, but behaves like a fluid as an aggregate. 2, the surface profile is "mountain-shaped", as shown in FIG. Further, as the powder is discharged, the surface shape changes to a mortar shape as shown in FIG.
  • a displacement meter is used to measure multiple points on the slope, and the angle of repose of each mountain shape and mortar shape is calculated each time, and mathematical calculations are performed to calculate the inventory amount.
  • FIG. 4 is a schematic explanatory diagram (part 1) of the existing technology.
  • FIG. 5 is a schematic explanatory diagram (Part 2) of the existing technology.
  • the inventory quantity calculation system 1' includes one measurement unit 5 installed above the storage tank 10, and a mirror unit 9 movably provided near the measurement unit 5. including.
  • the measurement unit 5 is, for example, a non-contact type displacement meter using a laser, and measures a plurality of points on the mountain-shaped surface of the powder while moving the mirror unit 9 . Then, the inventory quantity calculation system 1 ′ calculates the angle of repose ⁇ a based on the multiple points measured by the measurement unit 5 .
  • the measurement unit 5 similarly measures a plurality of points on the mortar-shaped surface of the powder. Then, the inventory quantity calculation system 1 ′ calculates the angle of repose ⁇ b based on the multiple points measured by the measurement unit 5 .
  • the angle of repose ⁇ a will be referred to as the “angle of repose (mountain)”
  • the angle of repose ⁇ b will be referred to as the “angle of repose (valley)”.
  • FIG. 6 is a schematic cross-sectional view (No. 3) of the storage tank 10 in which powder is stored.
  • the center of the bottom of the mortar often collapses as shown in FIG. For this reason, it is not possible to accurately calculate the inventory amount simply by obtaining the angles of repose ⁇ a and ⁇ b as in the existing technology.
  • the length of this recession may extend to the discharge port of the storage tank 10, and for this reason, an event may occur in which the powder is not discharged even though there is inventory. is an operational issue.
  • the powder is a mash-type feed, grains, nutritional supplements, oil components, etc. are combined, and the powder tends to be difficult to be discharged.
  • the first distance which is the distance to the center of the surface of the powder contained in the storage tank 10
  • the measurement wave provided in the upper part of the storage tank 10.
  • a second displacement meter 5b capable of measuring a second distance, which is the distance to the surface of the powder at a predetermined angle with respect to the vertical direction, by the measurement wave.
  • FIG. 7 is a diagram showing a configuration example of the inventory amount calculation system 1 according to the embodiment. Specifically, as shown in FIG. 7, in the inventory amount calculation method according to the embodiment, first, a measurement unit 5 having two displacement gauges is provided near the opening 13a of the storage tank 10. . As shown in FIG. 7, the measurement unit 5 according to the embodiment has a first displacement gauge 5a and a second displacement gauge 5b.
  • the first displacement gauge 5a measures the vertical distance to the center of the powder surface
  • the second displacement gauge 5b measures the angle with respect to the vertical direction. Measure the distance to the powder surface in the opposite direction.
  • the inventory amount calculation device 100 calculates the inventory amount based on the measurement result of the measuring unit 5.
  • the inventory quantity calculation device 100 holds parameters for calculating the inventory quantity for each powder type, which are set by actual measurement in advance. select.
  • the inventory amount calculation device 100 calculates the inventory amount of the powder in the storage tank 10 using the two distances measured by the measuring unit 5, the parameter for each selected powder type, and the calculation formula stored in advance. calculate.
  • the inventory amount calculation device 100 determines the vertical distance to the center of the powder surface, which is one of the two distances measured by the measuring unit 5, based on which the powder is hard to be discharged even if there is inventory. to detect.
  • FIG. 8 is a block diagram of the inventory amount calculation device 100 according to the embodiment.
  • constituent elements necessary for explaining the features of the present embodiment are represented by functional blocks, and descriptions of general constituent elements are omitted.
  • each component illustrated in FIG. 8 is functionally conceptual and does not necessarily need to be physically configured as illustrated.
  • the specific forms of distribution and integration of each functional block are not limited to those shown in the figure, and all or part of them can be functionally or physically distributed in arbitrary units according to various loads and usage conditions. ⁇ It is possible to integrate and configure.
  • the inventory quantity calculation device 100 includes a storage unit 101 and a control unit 102.
  • the input unit 3, the measurement unit 5, and the output unit 7 are connected to the inventory amount calculation device 100.
  • the input unit 3 is realized by a keyboard, mouse, touch panel, etc.
  • the measurement unit 5 is provided near the opening 13a of the storage tank 10 .
  • the measuring unit 5 has a first displacement gauge 5a and a second displacement gauge 5b, which are two non-contact type displacement gauges using radio waves or lasers as measurement waves.
  • the first displacement gauge 5a is provided so as to be able to measure the first distance l1, which is the vertical distance to the center of the surface of the powder stored in the storage tank 10.
  • the second displacement meter 5b is provided so as to be able to measure a second distance l2, which is the distance to the powder surface in the direction at an angle ⁇ c with respect to the vertical direction. That is, ⁇ c corresponds to the mounting angle of the second displacement meter 5b. It is desirable that the mounting angle ⁇ c is set to an angle that does not interfere with the occurrence of recession. A method for determining the mounting angle ⁇ c will be described later with reference to FIG. 13 .
  • the measurement unit 5 periodically measures the first distance l1 and the second distance l2 according to production activities, and transmits the measured values to the calculation unit 102c, which will be described later.
  • the output unit 7 is implemented by a display or the like.
  • the storage unit 101 is implemented by, for example, a semiconductor memory device such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, or a storage device such as a hard disk or optical disk.
  • the storage unit 101 stores tank information 101a, powder-specific information DB (data base) 101b, and calculation formula information 101c.
  • the tank information 101a is information in which various dimensions and the like regarding the storage tank 10 are set. Various dimensions include the tank length of the storage tank 10, the tank diameter, the distance from the first displacement meter 5a to the discharge port, and the like.
  • the powder-specific information DB 101b is a database that stores powder-specific information, which is information for each powder type including parameters for calculating the inventory amount for each powder type, which is set by actual measurement in advance.
  • FIG. 9 is a diagram showing an example of powder-specific information.
  • the powder-specific information includes, for example, a “powder type” item, an “angle of repose (mountain)” item, an “angle of repose (valley)” item, and a “cavity diameter” item. include.
  • the "powder type” item stores the identifier of the powder type.
  • the "angle of repose (mountain)” item stores the angle of repose (mountain) set by actual measurement in advance for each powder type.
  • the “angle of repose (valley)” item stores the angle of repose (valley) for each powder type set by actual measurement in advance.
  • the “sinking diameter” item stores the sinking diameter at the time of sinking for each powder type, which is set by actual measurement in advance.
  • the calculation formula information 101c is information including a calculation formula used to calculate the inventory amount. Such a calculation formula is registered in advance for each case, for example, when the powder is in the shape of a mountain, when the powder is in the shape of a mortar, and when the powder is in the shape of a depression. In addition to each case, the calculation formula may be registered for each powder type based on the above-described powder-specific information. In this case, the calculation formula information 101c may be included in the powder-specific information DB 101b.
  • the control unit 102 is a controller. For example, various programs (not shown) stored in the storage unit 101 are executed by a CPU (Central Processing Unit), MPU (Micro Processing Unit), etc., using RAM as a work area. It is realized by being Also, the control unit 102 can be realized by an integrated circuit such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array).
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • the control unit 102 has a setting unit 102a, an acquisition unit 102b, a calculation unit 102c, a detection unit 102d, and a notification unit 102e, and implements or executes the information processing functions and actions described below.
  • the setting unit 102a sets various types of information such as the tank information 101a, the powder-specific information DB 101b, and the calculation formula information 101c based on the user's input via the input unit 3 before the actual operation of the inventory calculation device 100. Set in advance.
  • the setting unit 102a may set the tank information 101a, the powder-specific information DB 101b, and the calculation formula information 101c based on information received from an external device via a network. Further, the setting unit 102a may appropriately update the powder-specific information DB 101b and the like based on the measurement result of the measurement unit 5 acquired by the acquisition unit 102b during the actual operation of the inventory amount calculation device 100.
  • FIG. 1 A block diagram illustrating an exemplary embodiment
  • the acquisition unit 102b acquires the powder type of the powder actually stored in the storage tank 10 during the actual operation of the inventory amount calculation device 100 based on the user's input via the input unit 3. In addition, the acquisition unit 102b acquires the powder type of the powder each time the powder stored in the storage tank 10 is changed. The acquisition unit 102b also outputs the acquired powder type to the calculation unit 102c.
  • the acquisition unit 102b acquires the measurement result of the measurement unit 5 as needed.
  • the acquisition unit 102b also outputs the acquired measurement result to the calculation unit 102c.
  • the acquisition unit 102b also outputs the acquired measurement result to the calculation unit 102c.
  • the acquisition unit 102b also outputs the acquired measurement result to the setting unit 102a, and causes the setting unit 102a to update the powder-specific information DB 101b and the like as appropriate.
  • the calculation unit 102c selects a corresponding parameter from the powder-specific information DB 101b according to the powder type acquired by the acquisition unit 102b. Further, the calculation unit 102c inputs the selected parameter, the information included in the tank information 101a, and the measurement result acquired by the acquisition unit 102b into the corresponding calculation formula of the calculation formula information 101c, and calculates the powder inventory amount. calculate. A specific inventory amount calculation method will be described later with reference to FIGS. 10 to 12. FIG. Further, the calculation unit 102c outputs the calculated calculation result to the notification unit 102e.
  • the detection unit 102d detects the vertical distance to the center of the powder surface measured by the first displacement meter 5a and the distance from the first displacement meter 5a to the discharge port, which are included in the measurement results obtained by the obtaining unit 102b. If the distances are compared and approximately equal, it detects that a cave-in has occurred that could prevent the inventory from being discharged. Further, the detection unit 102d outputs the detected result to the notification unit 102e.
  • the notification unit 102e notifies the user by outputting to the output unit 7 the calculation result calculated by the calculation unit 102c and the detection result detected by the detection unit 102d.
  • FIG. 10 is an explanatory diagram of a calculation method when the powder has a mountain-like surface shape.
  • FIG. 11 is explanatory drawing of the calculation method when the surface shape of powder is a mortar shape.
  • FIG. 12 is an explanatory diagram of a calculation method when the surface shape of the powder is a depressed shape.
  • ⁇ a indicates an angle of repose (mountain) corresponding to the type of powder.
  • ⁇ b indicates the angle of repose (valley) according to the type of powder.
  • ⁇ c indicates the mounting angle of the second displacement meter 5b.
  • L indicates the tank length of the storage tank 10 .
  • R indicates the tank diameter of the storage tank 10 .
  • Va indicates the volume of the conical portion, which is the conical portion, of the entire shape of the powder stored in the storage tank 10 .
  • Vb similarly indicates the volume of the cylindrical portion, which is the cylindrical portion of the entire shape of the powder.
  • Vc similarly indicates the volume of the recessed portion, which is the recessed portion, in the entire shape of the powder.
  • V1 indicates the volume of the known funnel portion 12.
  • Rh indicates the depression diameter corresponding to the type of powder.
  • l1 indicates the measured value of the first distance measured by the first displacement meter 5a.
  • l2 indicates the measured value of the second distance measured by the second displacement meter 5b.
  • the straight line SL1 in the drawing is expressed by the following formula (1) in the xy coordinate system with the measurement position of the first distance l1 as the origin. be able to.
  • straight line SL2 can be expressed by the following equation (2).
  • straight line SL3 can be expressed by the following equation (3).
  • xp and yp can be expressed by the following equation (4).
  • the volume Vmou of the entire powder in the storage tank 10 in the case of FIG. 10 can be obtained by the following formula (5).
  • volume Va of the conical portion can be obtained by the following formula (6) using the above formulas (1) to (4).
  • volume Vb of the cylindrical portion can be obtained by the following formula (7).
  • the volume Vmou of the powder in the case of FIG. 10 can be calculated by substituting the calculation results from the equations (6) and (7) into the above equation (5).
  • the straight line SL3 can be represented by the following equation (8).
  • volume Vmor of the entire powder in the storage tank 10 in the case of FIG. 11 can be obtained by the following formula (10).
  • the volume Va of the conical portion can be obtained by the following formula (11) using the above formulas (1), (2), (8) and (9).
  • volume Vb of the cylindrical portion can be obtained by the following formula (12).
  • straight line SL4 can be expressed by the following equation (13).
  • volume Vdep of the entire powder in the storage tank 10 in the case of FIG. 12 can be obtained by the following formula (15).
  • the volume Vc of the depressed portion can be obtained by the following equation (16) using the above equations (8), (13) and (14).
  • volume Vdep of the powder in the case of FIG. 12 can be calculated by substituting the calculation result of the formula (16) into the above formula (15).
  • FIG. 13 is an explanatory diagram of a method of determining the mounting angle ⁇ c of the second displacement meter 5b for measuring the second distance l2.
  • the upper limit distance Lmax to be measured can be determined by adjusting the attachment angle ⁇ c of the second displacement meter 5b that measures the second distance l2.
  • the point at which the measurement wave emitted by the second displacement gauge 5b hits the side surface of the storage tank 10 is the upper limit distance Lmax.
  • FIG. 13 shows the upper end of the funnel portion 12 as the upper limit of measurement
  • the upper limit of measurement distance may be set in the funnel portion 12 .
  • the inventory quantity calculation device 100 includes the first displacement gauge 5a, the second displacement gauge 5b, and the calculation unit 102c.
  • the first displacement meter 5a is provided at the top of the storage tank 10, and is provided so as to be able to measure a first distance l1, which is the distance to the center of the surface of the powder stored in the storage tank 10, in the vertical direction by the measurement wave.
  • the second displacement gauge 5b is provided so as to be able to measure a second distance l2, which is the distance to the powder surface at a predetermined angle ⁇ c with respect to the vertical direction, by means of the measurement wave.
  • the calculation unit 102c determines that the surface shape of the powder surface is a depressed shape. Calculate the powder inventory, including the case.
  • the inventory amount calculation device 100 According to the inventory amount calculation device 100 according to the embodiment, it is possible to improve the calculation accuracy of the inventory amount.
  • the user can plan or instruct the addition of powder. It is possible to greatly save labor from inventory management to be done. In addition, it is possible to recognize depressions that may prevent the powder from being discharged, and to take prompt countermeasures.
  • the inventory quantity calculation device 100 may be configured as a server device that integrates a plurality of storage tanks 10 via a network.
  • the calculation unit 102c acquires the first distance l1 and the second distance l2 for the plurality of storage tanks 10, and based on the acquired first distance l1 and the second distance l2 for each storage tank 10, The amount of powder in stock in each of the storage tanks 10 may be calculated.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

Selon l'invention, un dispositif de calcul de stock (100) selon un aspect d'un mode de réalisation comprend une première jauge de déplacement (5a), une seconde jauge de déplacement (5b), et une unité de calcul (102c). La première jauge de déplacement (5a) est ménagée dans une partie supérieure d'un réservoir de stockage (10), et est ménagée d'une manière telle qu'elle est apte à mesurer, dans une direction verticale au moyen d'ondes de mesure, une première distance (I1), qui est une distance jusqu'à une partie centrale d'une surface de poudre logée dans le réservoir de stockage (10). La seconde jauge de déplacement (5b) est ménagée d'une manière telle qu'elle est apte à mesurer, au moyen d'ondes de mesure, une seconde distance (I2), qui est une distance jusqu'à la surface de la poudre selon un angle prescrit (θc) par rapport à la direction verticale. L'unité de calcul (102c) calcule un stock de la poudre, même dans un cas dans lequel une géométrie de surface de la surface de poudre est une géométrie évidée, sur la base du résultat de mesure provenant de la première jauge de déplacement (5a), du résultat de mesure provenant de la seconde jauge de déplacement (5b), et d'un type de la poudre logée dans le réservoir de stockage (10).
PCT/JP2022/038931 2021-11-01 2022-10-19 Dispositif de calcul de stock et procédé de calcul de stock WO2023074497A1 (fr)

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JP2021178687A JP7026285B1 (ja) 2021-11-01 2021-11-01 在庫量算出装置および在庫量算出方法

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005147847A (ja) * 2003-11-14 2005-06-09 Mitsubishi Heavy Ind Ltd 灰溶融炉ホッパの灰レベル計測法及び計測装置
JP2010196027A (ja) * 2009-02-27 2010-09-09 Nippon Steel Engineering Co Ltd コークス乾式消火設備におけるコークスレベルの計測方法
US20190107427A1 (en) * 2017-10-06 2019-04-11 Vega Grieshaber Kg Radar fill level measurement device comprising radar chips on different planes of a circuit board
US20210140811A1 (en) * 2017-06-08 2021-05-13 Joint Stock Company "Limaco" Radar level gauge for measuring the volume of bulk products in tanks

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005147847A (ja) * 2003-11-14 2005-06-09 Mitsubishi Heavy Ind Ltd 灰溶融炉ホッパの灰レベル計測法及び計測装置
JP2010196027A (ja) * 2009-02-27 2010-09-09 Nippon Steel Engineering Co Ltd コークス乾式消火設備におけるコークスレベルの計測方法
US20210140811A1 (en) * 2017-06-08 2021-05-13 Joint Stock Company "Limaco" Radar level gauge for measuring the volume of bulk products in tanks
US20190107427A1 (en) * 2017-10-06 2019-04-11 Vega Grieshaber Kg Radar fill level measurement device comprising radar chips on different planes of a circuit board

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JP2023067445A (ja) 2023-05-16

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