WO2012080817A2 - Sistema de monitoreo en tiempo real del desgaste de nervios de parrillas de molinos semiautógenos, de detección de condiciones de cegado de parrillas durante la operación y detección de condiciones de trabajo con golpe directo de bolas en las parrillas - Google Patents
Sistema de monitoreo en tiempo real del desgaste de nervios de parrillas de molinos semiautógenos, de detección de condiciones de cegado de parrillas durante la operación y detección de condiciones de trabajo con golpe directo de bolas en las parrillas Download PDFInfo
- Publication number
- WO2012080817A2 WO2012080817A2 PCT/IB2011/003039 IB2011003039W WO2012080817A2 WO 2012080817 A2 WO2012080817 A2 WO 2012080817A2 IB 2011003039 W IB2011003039 W IB 2011003039W WO 2012080817 A2 WO2012080817 A2 WO 2012080817A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- signal
- grill
- mill
- monitoring system
- sensor
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/1805—Monitoring devices for tumbling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/22—Lining for containers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/12—Analysing solids by measuring frequency or resonance of acoustic waves
Definitions
- the present invention relates to a real-time monitoring system of the thickness of the nerves, the detection of undesirable impacts on a grill and the obstruction of the grooves of a grill of a semi-autogenous mill (SAG) for mineral grinding, while it is running.
- SAG semi-autogenous mill
- the operation of this system has as its main base, the detection and analysis of the frequency of natural vibration of the nerves of the grill and its relationship with the thickness of the nerves and the condition of rigidity that generates the obstruction of the slots with the grinding media
- the system consists basically: by a vibration sensor; by a wireless data transmission module; and a module for receiving this signal. Because the vibration sensor is introduced into the SAG mill to obtain the measurements, this fact results in that this sensor must have certain characteristics both in frequency and maximum impact resistance.
- This system also allows to detect conditions of direct hit of balls on the grills, with which actions can be taken to eliminate this working condition or minimize it to avoid the fracture of the grills.
- the grills suffer wear due to the movement of the internal load that generates abrasive actions on the linings and direct blows generated by the grinding elements, steel balls .
- variations in the internal load content due to granulometry effects of the feed ore or mineral hardness, cause variations in the composition of the internal load.
- Naps Variations mean a decrease in the proportion of mineral inside, there is a greater proportion of grinding balls in the mill, which increases the mechanical requirement of the components, especially the grills that suffer an excess of blows of elements that are intended to hit the ore. This condition can cause the blows of the balls against the grills to generate greater wear than they normally have, or they reach the levels of structural resistance causing the fracture of these elements, especially in the last stage of their useful life.
- the control of the conditions in which the components of the coatings of a mill are found is done by stopping the mill for inspection, generating a significant loss of production. In these arrests, the condition of these elements is visually checked and the thickness of the grill nerves is measured to establish the remaining useful life.
- the wave receiving means are arranged rotating around the longitudinal axis of the envelope in an angular sector greater than the angular sector that encompasses ⁇ and Q>. 3.
- the emitter is arranged on the longitudinal axis of the envelope, said emitter being a gamma photon emitter.
- the electronic circuit for determining the amount of balls comprises, for each generatrix (Ib, Ib), a converter and a linearizer, the signals of each linearizer being associated to calculate the amount of balls.
- the electronic circuit of Determination of the wear of the envelope comprises a converter associated with a device for reading the degree of wear.
- the noise analysis system forms a noise spectrum and contains a fast Fourier transformation device. It also contains a device that forms the average of the spectrum over a long period of time. This system allows to determine the mill performance, especially stone mill, to be optimized and improve the quality of the material produced.
- the objective of this invention is to provide a monitoring system, which allows determining: the thickness of the ribs, conditions of unwanted impacts on the grills and the obstruction of the slots of a grill for a SAG mill for mineral grinding, while it is in operation.
- Another objective of this invention is to be able to detect conditions of direct hitting balls on the grills, whereby actions can be taken to eliminate this working condition or minimize it.
- Figure 1 shows a perspective view of a grill with the face of the front surface or presentation surface of the ore in this component, which is directly in contact with the internal load of ore and moving balls.
- Figure 2 shows a perspective view of a grill on its rear face, which is in contact with the mineral that has managed to pass through the grill slots and accumulates in the drawer (pulp lifter) to later be evacuated from inside the mill.
- Figure 3 shows an enlarged view of Figure 2, illustrating the preferred location of the sensor of the monitoring system of the present invention.
- Figure 4 shows a half-cut view of a mill, illustrating the lid and the fastening bolts thereof.
- Figure 5 shows a schematic view of a grill and the cover of a semi-autogenous mill for grinding minerals, with a perforation of one of the fastening bolts of said lid.
- Figure 6 shows a block diagram of the monitoring system of the present invention.
- Figure 7 shows a schematic view of a first sensor location of the monitoring system of the present invention.
- Figure 8 shows a schematic view of a first sensor location of the monitoring system of the present invention.
- Figure 9 shows a schematic perspective of the installation of the accelerometer on the grill.
- Figure 10 shows a perspective of a grid subject to calibration, and then be installed in the mill.
- the present invention relates to a real-time monitoring system of the thickness of the ribs of a grill for a SAG mill, the detection of unwanted impacts during operation and the obstruction of its grooves, while the mill is in operation.
- the operation of this system has as the main basis, the relationship between the thickness of the nerves and their natural vibration.
- a grill (1) which has a screening surface (2) that has a central lifter (3).
- On the screening surface there is a plurality of grooves (4) that have a rib that conforms them, with sufficient structural strength to contain the moving internal load and allow the ore that reaches the size of the opening to exit the mill towards the discharge drawer.
- the ribs (5) are generated which are subject to abrasive wear mainly.
- the grinding elements which are usually large steel balls (up to 6 inches [equivalent to 15.3 centimeters] currently), on the surface of the nerves (5) causing their fracture on certain occasions.
- obstruction can occur due to balls that get stuck between them, so that the mineral is not discharged from inside the mill.
- FIG. 2 shows a rear view of the grill (1), where the outer surface (7) of the grill is illustrated, not exposed to shocks.
- these grills have a central channel (6) where the support elements fit and allow the grill to be attached to the inside of the mill, using fastening bolts.
- the principle of this invention is based on the fact that if a nerve (5) having a certain thickness is hit by a steel ball, it vibrates with its natural frequency. If the thickness changes, that natural frequency will also change.
- an accelerometer In order to detect the vibration frequency of a nerve, an accelerometer is used as a vibration sensor.
- the accelerometer is a transducer that It measures the acceleration with which it is affected by some force and its movement of effect.
- accelerometers are specially made to measure types of vibration in objects to which it is attached and not of all the signals around it, as would be the case with a microphone and, with the acceleration having the same frequencies as the movement that the produce, it can deliver accurate results and varied characteristics depending on factors such as vibration intensity and vibration frequencies.
- the vibration sensor cannot be located directly on the nerve, because any work done on it, for example a perforation, to locate said sensor there, would affect the structural resistance of the nerve (5), causing the weakening of this one.
- FIG. 3 This figure is an enlarged view of Figure 2 showing the outer surface (7) of the grill (1).
- the sensor is located in a perforation (8) that is at the base of the nerve (5), close to the central channel (6) that fits with the support elements (22), and which, through bolts, allow the grill to be attached to the inside of the mill.
- a mill (9) is shown in half cut, in whose interior (10) are the linings and lifting elements, also subject to wear, allowing the mineral together with the balls, to rotate, rise and fall , producing the grinding of the mineral that enters through the opening (14) and exits through the exit (15).
- the mill (9) has a cover (11) attached to the support elements (22), which allow the grill (1) to be held by bolts (12).
- the modules of the monitoring system of the present invention are shown in Figure 6, wherein an accelerometer (16) is connected to an accelerometer adapter unit (17) and a wireless transmitter (18), which are connected to a timer (19).
- the wireless transmitter (18) emits a signal that is received by a wireless receiver (20), connected to a signal acquirer (21), which is usually a PC with acquisition software.
- the function of the timer is to define the time interval for the transmitter's signal emission, since it is not required to emit 100% of the mill's working time, but only a specified time interval in defined periods (one per day , every two days, every three days, etc.).
- the accelerometer signal (16) is conducted by a wiring (23) located on the outer surface (7) of the grill (1), said said wiring (23) to the channel (6) of the grill, and then entering the cavity (15) of the support elements (22), said wiring (23) being connected to the wireless transmitter (18) located in a bolt (12) of the cover (11) of the mill (9), the wireless signal being transmitted to the wireless receiver (20), wherein said signal is processed by a signal acquirer (21), which is normally a PC with acquisition software.
- the wireless receiver (20) can be installed in some secure sector outside the SAG mill, with a distance of about 20 meters.
- the accelerometer signal (16) is conducted by a wiring (23) located on the outer surface (7) of the grill (1), said wiring arriving (23) towards the channel (6) of the grill, where the wireless transmitter (18) is located, the wireless signal being transmitted directly to the wireless receiver (20), wherein said signal is processed by a signal acquirer (21), which It is usually a PC with purchasing software.
- the wireless receiver (20) can also be installed in some secure sector outside the SAG mill, with a maximum distance of about 20 meters.
- the wireless signal of the transmitter (18) can be emitted directly from the grill (1).
- this second embodiment represents a much simpler embodiment of the invention for sending the wireless signal, however, said signal requires a greater amount of tests on the ground and within the mill, to perform the correlation between the received vibration and the thickness.
- the accelerometer (16) is installed directly in contact with the outer surface (7) of the grill (1), when it receives the blows, it can become saturated, leaving its scale, resulting in a measurement impossible.
- the accelerometer is mounted on the grill on an elastomeric material, such as a rubber.
- a perforation (8) is made whose depth is sufficient so that a magnet (24) is placed in its bottom, and on this, a rubber (25) that allows the magnetic conduction, and therefore, the adhesion of the accelerometer to the magnet (24) that allows a secure connection of the grill to the accelerometer.
- an accelerometer has been used as a sensor, whose signal correlates with the thickness, it is possible to use other types of sensors that allow the same function to be performed, such as for example an extensometric tape ( strain gage).
- extensometric tape strain gage
- This calibration consists of:
- step (a) Correlate said signal with the thickness of the nerve (5).
- This procedure can be carried out with the grill inside the mill, and alternatively, outside the mill.
- a tube (25) is used, preferably of plastic, of a diameter slightly larger than that of the ball (26), as shown in Figure 10.
- This tube (25) is located vertically, where the lower part of said tube (25) touches or is located slightly above the surface of the nerve and the ball (26) is dropped from the top, where the vibration of the The stroke is captured by the sensor (16), which can be an accelerometer or strain gage, transmitting the signal to the sensor adapter unit (17) and the wireless transmitter (18), where the latter emits the signal that is received by the wireless receiver (20), connected to a signal acquirer (21).
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR112013015054-8A BR112013015054B1 (pt) | 2010-12-14 | 2011-12-14 | Sistema de monitoraqao em tempo real para determinar o desgaste de barras de grelha em moinhos semi-autogenos a fim de detectar as condiqoes de emperramento de grelhas durante a operaqao, e a fim de detectar condiqoes de trabalho sob impacto direto das esferas sobre as grelhas |
US13/916,302 US9527087B2 (en) | 2010-12-14 | 2013-06-12 | Real-time monitoring system to determine wear of grate ribs in semi-autogenous mills, to detect clogging conditions of the grates during the operation and to detect working conditions under direct impact of the balls on the grates |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CL1433-2010 | 2010-12-14 | ||
CL2010001433A CL2010001433A1 (es) | 2010-12-14 | 2010-12-14 | Sistema para monitorizar en tiempo real el desgaste del espesor de los nervios de una parrilla de un molino sag, producido por la acción abrasiva de la pulpa del mineral y de los elementos de la molienda durante la operación; y método de calibración del sistema. |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/916,302 Continuation US9527087B2 (en) | 2010-12-14 | 2013-06-12 | Real-time monitoring system to determine wear of grate ribs in semi-autogenous mills, to detect clogging conditions of the grates during the operation and to detect working conditions under direct impact of the balls on the grates |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2012080817A2 true WO2012080817A2 (es) | 2012-06-21 |
WO2012080817A3 WO2012080817A3 (es) | 2012-08-09 |
Family
ID=45757739
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2011/003039 WO2012080817A2 (es) | 2010-12-14 | 2011-12-14 | Sistema de monitoreo en tiempo real del desgaste de nervios de parrillas de molinos semiautógenos, de detección de condiciones de cegado de parrillas durante la operación y detección de condiciones de trabajo con golpe directo de bolas en las parrillas |
Country Status (5)
Country | Link |
---|---|
US (1) | US9527087B2 (es) |
BR (1) | BR112013015054B1 (es) |
CL (1) | CL2010001433A1 (es) |
PE (1) | PE20131410A1 (es) |
WO (1) | WO2012080817A2 (es) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9527087B2 (en) | 2010-12-14 | 2016-12-27 | Universidad De Santiago De Chile | Real-time monitoring system to determine wear of grate ribs in semi-autogenous mills, to detect clogging conditions of the grates during the operation and to detect working conditions under direct impact of the balls on the grates |
US9636685B2 (en) * | 2014-04-28 | 2017-05-02 | Outotec (Finland) Oy | Method and an arrangement for determining a degree of fullness of a large grinding mill drum, and a large grinding mill drum |
CN109406083A (zh) * | 2018-11-08 | 2019-03-01 | 国网新疆电力有限公司电力科学研究院 | 一种悬垂金具串风激励振动磨损模拟试验平台 |
CN110860344A (zh) * | 2019-11-18 | 2020-03-06 | 陈国才 | 一种水性涂料制备预分散处理装置及处理方法 |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10682649B2 (en) * | 2013-04-09 | 2020-06-16 | Esco Group Llc | Discharge grates for reduction mills |
US10668478B2 (en) | 2013-09-11 | 2020-06-02 | Distron Manufacturing Co. | Multi directional rifling and multi flow variable speed rifling for liner segments for crushers, reclaimers, separators and cleaners for products |
US9757731B2 (en) * | 2013-09-11 | 2017-09-12 | Didion Manufacturing Company | Interlocking liner segments for a tumbling unit |
MX353448B (es) * | 2014-12-18 | 2018-01-09 | Electro Controles Del Noroeste S A De C V | Sistema analizador de sonido generado en molinos basado en sistemas embebidos y un arreglo de micrófonos. |
CL2015001220A1 (es) * | 2015-05-07 | 2015-10-09 | Univ Técnica Federico Santa María | Un sistema y método para la estimación en linea del nivel de llenado de bolas y nivel de carga en un molino rotatorio |
CN105013575B (zh) * | 2015-08-07 | 2017-10-27 | 南京西普水泥工程集团有限公司 | 具有筛分功能的磨机衬板 |
WO2019159119A1 (en) | 2018-02-15 | 2019-08-22 | Flsmidth A/S | Comminution device feed mechanism and method |
MX2020013516A (es) * | 2018-06-18 | 2021-04-28 | Compania Electro Metalurgica S A | Ensamble de revestimiento mejorado para molino de mineral. |
CL2018003351A1 (es) * | 2018-11-23 | 2019-05-10 | Alvaro Gonzalo Pinto Galleguillos | Conjunto de placa de desgaste para monitorear remotamente el desgaste en placas de desgaste de maquinaria; sistema y métodos asociados. |
PE20211723A1 (es) | 2018-12-26 | 2021-09-03 | Viwek Vaidya | Dispositivo y sistema para monitorear desgaste de elevadores montados en una trituradora de minerales |
CN111623701A (zh) * | 2020-04-27 | 2020-09-04 | 洛阳矿山机械工程设计研究院有限责任公司 | 一种球磨机衬板底板磨损在线检测方法 |
CN113843007A (zh) * | 2021-08-13 | 2021-12-28 | 安徽金日晟矿业有限责任公司 | 一种球磨机用螺旋型衬板 |
CN114308287B (zh) * | 2021-12-30 | 2023-02-03 | 洛阳山盾机械科技有限公司 | 一种解决自磨机和半自磨机变形或开裂的衬板结构 |
CN114618791A (zh) * | 2022-01-26 | 2022-06-14 | 中国恩菲工程技术有限公司 | 铁矿石半自磨顽石的除铁方法及装置 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4215455A1 (de) | 1992-05-11 | 1993-11-18 | Franc Godler | Vorrichtung und Verfahren zur Bestimmung des Füllstandes von Mühlen |
US5698797A (en) | 1995-06-01 | 1997-12-16 | Gec Alsthom Stein Industrie | Device for monitoring a ball grinder |
US6874364B1 (en) | 1999-07-09 | 2005-04-05 | Commonwealth Scientific And Industrial Research Organisation | System for monitoring mechanical waves from a moving machine |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3033575A1 (de) * | 1980-09-06 | 1982-05-06 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Verfahren und vorrichtung zur leistungsregelung einer muehle |
US5264368A (en) * | 1990-10-10 | 1993-11-23 | Boston Advanced Technologies, Inc. | Hydrocarbon leak sensor |
US5159312A (en) * | 1991-04-01 | 1992-10-27 | Engle Edgar R | Double switch safety system and signaling device for a trailer hitch coupling |
US6252334B1 (en) * | 1993-01-21 | 2001-06-26 | Trw Inc. | Digital control of smart structures |
US6390401B1 (en) * | 1999-08-18 | 2002-05-21 | Servicios Y Consultorias Hendaya S.A. | Liner segment locator/retainer for ORE grinding mills |
CA2456608C (en) * | 2003-01-31 | 2009-01-06 | Universidad Tecnica Federico Santa Maria | A system to determine and analyze the dynamic internal load in revolving mills, for mineral grinding |
KR100704484B1 (ko) * | 2005-05-04 | 2007-04-09 | 엘지전자 주식회사 | 로봇 청소기의 먼지통 감지장치 |
US7172144B1 (en) * | 2006-03-09 | 2007-02-06 | Dennis Slater | System for measuring wear in a grinding mill |
CL2010001433A1 (es) | 2010-12-14 | 2012-10-05 | Univ Santiago Chile | Sistema para monitorizar en tiempo real el desgaste del espesor de los nervios de una parrilla de un molino sag, producido por la acción abrasiva de la pulpa del mineral y de los elementos de la molienda durante la operación; y método de calibración del sistema. |
-
2010
- 2010-12-14 CL CL2010001433A patent/CL2010001433A1/es unknown
-
2011
- 2011-12-14 WO PCT/IB2011/003039 patent/WO2012080817A2/es active Application Filing
- 2011-12-14 PE PE2013001415A patent/PE20131410A1/es active IP Right Grant
- 2011-12-14 BR BR112013015054-8A patent/BR112013015054B1/pt active IP Right Grant
-
2013
- 2013-06-12 US US13/916,302 patent/US9527087B2/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4215455A1 (de) | 1992-05-11 | 1993-11-18 | Franc Godler | Vorrichtung und Verfahren zur Bestimmung des Füllstandes von Mühlen |
US5698797A (en) | 1995-06-01 | 1997-12-16 | Gec Alsthom Stein Industrie | Device for monitoring a ball grinder |
US6874364B1 (en) | 1999-07-09 | 2005-04-05 | Commonwealth Scientific And Industrial Research Organisation | System for monitoring mechanical waves from a moving machine |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9527087B2 (en) | 2010-12-14 | 2016-12-27 | Universidad De Santiago De Chile | Real-time monitoring system to determine wear of grate ribs in semi-autogenous mills, to detect clogging conditions of the grates during the operation and to detect working conditions under direct impact of the balls on the grates |
US9636685B2 (en) * | 2014-04-28 | 2017-05-02 | Outotec (Finland) Oy | Method and an arrangement for determining a degree of fullness of a large grinding mill drum, and a large grinding mill drum |
CN109406083A (zh) * | 2018-11-08 | 2019-03-01 | 国网新疆电力有限公司电力科学研究院 | 一种悬垂金具串风激励振动磨损模拟试验平台 |
CN109406083B (zh) * | 2018-11-08 | 2023-12-05 | 国网新疆电力有限公司电力科学研究院 | 一种悬垂串金具风激励振动磨损模拟试验平台 |
CN110860344A (zh) * | 2019-11-18 | 2020-03-06 | 陈国才 | 一种水性涂料制备预分散处理装置及处理方法 |
Also Published As
Publication number | Publication date |
---|---|
BR112013015054A2 (pt) | 2016-08-09 |
CL2010001433A1 (es) | 2012-10-05 |
US9527087B2 (en) | 2016-12-27 |
US20140150524A1 (en) | 2014-06-05 |
WO2012080817A3 (es) | 2012-08-09 |
PE20131410A1 (es) | 2014-01-19 |
BR112013015054B1 (pt) | 2020-11-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2012080817A2 (es) | Sistema de monitoreo en tiempo real del desgaste de nervios de parrillas de molinos semiautógenos, de detección de condiciones de cegado de parrillas durante la operación y detección de condiciones de trabajo con golpe directo de bolas en las parrillas | |
US11666922B2 (en) | Liner assembly for ore grinding mill | |
Xu et al. | Development of rapeseed cleaning loss monitoring system and experiments in a combine harvester | |
KR101174794B1 (ko) | 콘크리트 비파괴 검사를 위한 탄성파 측정 장치 | |
CN101617207A (zh) | 超低速旋转设备的异常诊断方法及装置 | |
CN108698766A (zh) | 用于调节在输送带处的刮除装置的工作方式的方法和装置 | |
JP3770668B2 (ja) | 構造物の内部欠陥の検知方法 | |
KR101358177B1 (ko) | 골프공 검사장치 | |
US7549336B2 (en) | Harmonic fatigue evaluation | |
AU2011249642A1 (en) | Method and apparatus for opening threaded joints of drilling equipment | |
Itakura et al. | Basic characteristics of ground vibration sensors for the detection of debris flow | |
US20040045378A1 (en) | Measurements of particle size in pneumatic flows | |
Spencer et al. | Acoustic emissions monitoring of SAG mill performance | |
US5951292A (en) | Method of detecting periodontal disease by detecting the natural frequency of a tooth. | |
CN109142096A (zh) | 应用于极地圈附近海洋探测船舶用钢强度检测装置 | |
WO2012090173A1 (es) | Sistema y método de medición en tiempo real del flujo de material de descarga de un molino para la molienda de minerales | |
US4534219A (en) | Acoustic detection of cracks in metal pieces | |
US4024768A (en) | Determination of particle sizes | |
CA1157141A (en) | Grain sensor | |
Xie et al. | Seismic‐acoustic sensing of sea ice wave mechanical properties | |
JP2008506967A (ja) | 地震を測定するための高効率可搬式地震計 | |
CN108286250A (zh) | 一种深层动力触探能量测试装置及其测试方法 | |
CN213682058U (zh) | 一种多功能的水利工程地基检测装置 | |
AU2021303294A1 (en) | Monitoring liner wear in industrial mills | |
JP7175861B2 (ja) | タイル健全性判定装置及び方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11820865 Country of ref document: EP Kind code of ref document: A2 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 001415-2013 Country of ref document: PE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 11820865 Country of ref document: EP Kind code of ref document: A2 |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112013015054 Country of ref document: BR |
|
ENP | Entry into the national phase |
Ref document number: 112013015054 Country of ref document: BR Kind code of ref document: A2 Effective date: 20130617 |