WO2011058755A1 - コンベアベルト摩耗検出装置 - Google Patents
コンベアベルト摩耗検出装置 Download PDFInfo
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- WO2011058755A1 WO2011058755A1 PCT/JP2010/006643 JP2010006643W WO2011058755A1 WO 2011058755 A1 WO2011058755 A1 WO 2011058755A1 JP 2010006643 W JP2010006643 W JP 2010006643W WO 2011058755 A1 WO2011058755 A1 WO 2011058755A1
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- Prior art keywords
- conveyor belt
- magnet
- front side
- wear
- rubber magnet
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- 238000001514 detection method Methods 0.000 claims description 37
- 239000000463 material Substances 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 239000011159 matrix material Substances 0.000 claims description 4
- 239000006247 magnetic powder Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 description 12
- 238000005299 abrasion Methods 0.000 description 8
- 239000012779 reinforcing material Substances 0.000 description 8
- 230000007423 decrease Effects 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 5
- 238000013459 approach Methods 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 1
- PRQMIVBGRIUJHV-UHFFFAOYSA-N [N].[Fe].[Sm] Chemical compound [N].[Fe].[Sm] PRQMIVBGRIUJHV-UHFFFAOYSA-N 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
- B65G43/02—Control devices, e.g. for safety, warning or fault-correcting detecting dangerous physical condition of load carriers, e.g. for interrupting the drive in the event of overheating
Definitions
- the present invention relates to a rubber magnet embedded in a conveyor belt, a magnetic sensor that is disposed in proximity to a front side surface that constitutes an outer peripheral surface of the conveyor belt, and detects a magnetic field from the rubber magnet, and the magnetic sensor
- the present invention relates to a conveyor belt wear detection device comprising a calculation unit for estimating the wear amount of the front side surface of the conveyor belt based on the signal of the conveyor belt, and in particular, accurately detects the wear amount even when the wear amount approaches the wear limit. It is related with the conveyor belt abrasion detection apparatus which can do.
- the conveyor belt 2 has a rubber magnet 91 embedded in the conveyor belt 2 and a front surface 2 a of the conveyor belt 2.
- a magnetic sensor 4 for detecting the magnetic field of the motor
- a calculation unit for estimating the wear amount of the front side surface 2a of the conveyor belt 2 based on a signal from the magnetic sensor 4 (for example, Patent Document 1). reference).
- a plate-like inclined magnet 92 that is inclined with respect to the front side surface 2a and linearly extends from the outer end on the side close to the front side surface 2a to the inner end on the far side in the longitudinal section of the conveyor belt.
- a stepped magnet 93 in which a plurality of plate-like magnets parallel to the front side surface 2a are arranged stepwise is used.
- This apparatus is configured to estimate the wear amount based on the time-varying pattern of the magnetic field by the gradient magnet 92 until the wear amount becomes D1 and the stepped magnet is exposed to the front side surface 2a.
- the time T from the time t1 corresponding to the peak of the magnetic field to the time t0 when the magnetic field becomes zero decreases by a length proportional to the wear amount.
- the wear amount is calculated as (1 ⁇ Tx / T0) times D, that is, D * (1 ⁇ Tx / T0).
- the wear amount is estimated based on the magnetic force pattern from the stepped magnet 93. This is because the stepped magnet 93 has a large magnet volume and a strong magnetic force with respect to the distance extending in the conveyor belt thickness direction. In the case of the stepped magnet 93, the time-varying pattern of the magnetic field appears in a step shape according to the shape of the stepped magnet 93, and it is possible to know how much the wear has occurred depending on the number of steps.
- the stepped magnet 93 has the following problems. That is, in addition to the magnet material being easily worn compared to the surrounding rubber portion, in particular, the stepped magnet 93 has a wide surface parallel to the front side surface of the conveyor belt, so that the stepped magnet 93 is on the front side surface. When exposed, the stepped magnet 93 wears more intensively than the surrounding rubber part, and as a result, the time-varying pattern of the magnetic field by the stepped magnet 93 may not accurately represent the rubber part wear. It has been understood.
- the present invention has been made in view of such problems, and the amount of wear of the conveyor belt is determined from the time-varying pattern of the magnetic field when the rubber magnet embedded in the conveyor belt decreases with wear of the conveyor belt.
- An object of the present invention is to provide a conveyor belt wear detecting device capable of accurately estimating the wear amount even when wear increases.
- a conveyor belt wear detecting device includes a rubber magnet embedded in a conveyor belt and the rubber magnet disposed in the vicinity of a front side surface constituting an outer peripheral surface of the conveyor belt.
- the conveyor belt wear detection device comprising: a magnetic sensor that detects a magnetic field from the magnetic sensor; and a calculation unit that estimates a wear amount on the front side surface of the conveyor belt based on a signal from the magnetic sensor.
- a plate-like inclined portion extending in the conveyor belt width direction and inclined linearly from the outer end on the side close to the front side to the inner end on the far side in the cross section in the conveyor belt length direction; It is composed of a plate-like parallel portion that is continuous with the inner end of the inclined portion and is arranged in parallel with the front side surface, and both the inclined portion and the parallel portion are magnetized in the thickness direction. It is set to.
- the conveyor belt wear detecting device is characterized in that the inclined portion is arranged such that the inner end is on the front side in the conveyor belt traveling direction from the outer end.
- a waveform width at a threshold set in advance as a specific sensor output value of the time change pattern of the magnetic field detected by the magnetic sensor by the arithmetic unit That is, when the waveform detection time is Rx and the initial waveform width at the threshold value of the time change pattern when the conveyor belt is not worn, that is, the initial waveform detection time is R0, the initial waveform width of the waveform width Rx. Based on the ratio (Rx / R0) to R0, the wear amount of the conveyor belt at the time of magnetic field detection is estimated.
- the conveyor belt abrasion detection apparatus which concerns on the other aspect of this invention is for correcting the waveform width
- a conveyor belt wear detecting apparatus is characterized in that the rubber magnet is formed by dispersing and magnetizing magnetic powder in a rubber material matrix.
- the rubber magnet extends in the conveyor belt width direction, and is inclined with respect to the front side surface in the cross section in the conveyor belt length direction, and is on the outer end on the side close to the front side surface.
- a plate-like inclined portion linearly extending to the inner end on the far side from the plate and a plate-like parallel portion arranged in parallel to the front side and continuing to the inner end of the inclined portion.
- the magnetic volume can generate a magnetic field that can be detected by the magnetic sensor just before the inclined portion disappears. Therefore, even if wear progresses greatly, the progress of wear can be accurately estimated.
- the inclined portion is disposed such that the inner end is on the front side in the conveyor belt traveling direction from the outer end.
- the peeling range can be reduced.
- the calculation unit has a waveform at a threshold value preset as a specific sensor output value of the time change pattern of the magnetic field detected by the magnetic sensor.
- the width is Rx and the initial waveform width at the threshold of the time change pattern when the conveyor belt is not worn is R0
- the ratio of the waveform width Rx to the initial waveform width R0 Rx / R0
- D f (Rx / R0) of the thickness D of the conveyor belt and the ratio (Rx / R0) obtained by experiment in advance, wear from the front side surface at the time of magnetic field detection is achieved.
- the thickness of the advanced conveyor belt can be estimated with high accuracy.
- the waveform width of the output waveform detected by the rubber magnet is corrected on the front side or the rear side of the rubber magnet in the traveling direction of the conveyor belt. Therefore, the reference magnet can correct the waveform width of the output waveform detected from the rubber magnet, and the accuracy of the measurement result is ensured and the measurement accuracy is not lowered.
- the rubber magnet is formed by dispersing and magnetizing magnetic powder in a rubber material matrix, so that the conveyor is used by being deformed.
- the belt can be flexibly followed according to the deformation of the belt, and durability can be ensured while maintaining a high magnetic force.
- FIG. 3 is a side view of the conveyor belt of the conveyor belt wear detecting device according to the first embodiment of the present invention
- FIG. 4 is an enlarged cross-sectional view of a portion b in FIG. 3
- FIG. It is an arrow view corresponding to an arrow view.
- the wear detection device includes a rubber magnet 3 embedded on the front side surface 2a of the conveyor belt 2 wound around the pulley 1, and a magnet that is disposed close to the front side surface 2a and detects a magnetic field from the rubber magnet 3. And a sensor 4.
- the rubber magnet 3 extends in the conveyor belt width direction, is inclined with respect to the front side surface 2a in a section in the conveyor belt length direction, and linearly extends from the outer end 3b on the side close to the front side surface 2a to the inner end 3a on the far side.
- the plate-like inclined portion 21 extends and the plate-like parallel portion 22 that is continuous with the inner end 3a of the inclined portion 21 and is arranged in parallel with the front side surface 2a. Both the inclined portion 21 and the parallel portion 22 are thick. Magnetized in the vertical direction.
- the inclined portion 21 is disposed such that the outer end 3b is in front of the inner end 3a in the conveyor belt traveling direction (see the arrow in the figure). And the rubber magnet 3 is embed
- the outer end 3 b of the inclined portion 21 of the rubber magnet 3 is exposed to the front side surface 2 a from the beginning of use, and the parallel portion 22 of the rubber magnet 3 is in contact with the reinforcing material 5 of the conveyor belt 2. Therefore, the degree of wear can be detected over a wide range from the initial stage of wear.
- a magnet obtained by magnetizing a bonded magnet formed by dispersing and mixing magnet powder in a rubber matrix into a sheet shape in the thickness direction is preferably used.
- Such a bonded magnet can be formed thin, but also has a high flexibility and can easily follow the deformation of the conveyor belt 2.
- the magnet powder is generally ferrite, but a strong magnetic force can be imparted by using a rare earth magnet such as neodymium iron boron or samarium iron nitrogen, or an arco magnet.
- a rare earth magnet such as neodymium iron boron or samarium iron nitrogen, or an arco magnet.
- the magnetic sensor 4 can be a gauss meter, a loop coil, an MI sensor, or the like, and is arranged as close as possible to the passing position of the rubber magnet 3.
- the mounting position of the magnetic sensor 4 is preferably on the return side of the conveyor belt 2 as shown in FIGS. Thereby, the conveyed product conveyed by the conveyor belt 2 can be detected at a clean location after being scraped off by the scraper 6.
- a width direction guide 7 is provided near the magnetic sensor 4 to regulate the position in the width direction of the conveyor belt 2 passing through the magnetic sensor 4.
- a thickness direction guide 8 for keeping the relationship between the belt 2 and the magnetic sensor 4 constant is provided.
- FIG. 6 is an example of the calculation unit 20 of the wear detection device for the conveyor belt 2.
- the calculation unit 20 receives the detection signal from the magnetic sensor 4, calculates the degree of wear of the belt and transmits it from the transmission unit 9, and the transmitted signal Is received by the receiving unit 11, the calculation result is output to the output terminal 12, and an alarm is issued when the degree of wear exceeds a predetermined threshold, or the operation of the belt conveyor 2 is stopped.
- a central control unit 13 for processing.
- FIG. 7 is a cross-sectional view along the belt longitudinal direction of the conveyor belt according to the second embodiment of the present invention.
- the conveyor belt 30 is configured such that the trigger magnet 31 and the reference magnet 32 are in close contact with the reinforcing material 5 that is the belt core on both sides of the rubber magnet 3 in the longitudinal direction of the belt.
- the conveyor belt 2 has the same configuration as the conveyor belt 2 (see FIG. 4) according to the first embodiment except that the conveyor belt 2 is embedded in the state.
- the trigger magnet 31 is disposed in front of the rubber magnet 3 in the traveling direction of the conveyor belt so that, for example, the front in the belt traveling direction is the S pole and the rear in the belt traveling direction is the N pole. During the travel, the trigger magnet 31 passes through a position facing the magnetic sensor 4 as a magnetic field detection region by the magnetic sensor 4 before the rubber magnet 3. The trigger magnet 31 functions as a trigger for the magnetic sensor 4 to start detecting the magnetic field of the rubber magnet 3 by detecting its own magnetic field by the magnetic sensor 4.
- the reference magnet 32 is disposed behind the rubber magnet 3 in the direction of travel of the conveyor belt, and the reference magnet 32 is positioned behind the rubber magnet 3 when the conveyor belt 30 travels.
- the magnetic sensor 4 passes through a position facing the magnetic sensor 4 as a magnetic field detection region.
- the rubber is easily affected and varied by various factors such as the separation distance between the magnetic sensor 4 and the rubber magnet 3 and the running speed of the conveyor belt 30 at the time of waveform detection.
- the waveform width as exemplified in FIG. 8 of the output waveform from the magnet 3 can be corrected, and thereby the measurement accuracy can be improved.
- the waveform width of the sensor output value detected from the rubber magnet 3 by the magnetic sensor 4 using the reference magnet 32 it is embedded in the conveyor belt 30 every time the magnetic field of the rubber magnet 3 is detected.
- the first measurement of the waveform width of the rubber magnet 3 in a new state in which the rubber magnet 3 is not yet worn is detected.
- the waveform width of the reference magnet 32 is measured, and after a certain amount of time from the first waveform width measurement, the second time the rubber magnet 3 and the reference are measured while the conveyor belt 30 is worn.
- the waveform width of each of the magnets 32 is measured, and the waveform width measurement for the third and subsequent times is performed in the same manner as the wear of the conveyor belt 30 progresses thereafter.
- the waveform width at an arbitrary sensor output value C in the output waveform from the reference magnet 32 at the time of the first measurement is used as a reference
- the ratio of the change of the same waveform width of the reference magnet 32 to the first waveform width is defined as the waveform width retention rate
- the output waveform from the rubber magnet 3 at the second measurement is based on this waveform width retention rate.
- the waveform width of the rubber magnet 3 can be corrected by correcting the waveform width.
- the third and subsequent times can be corrected by calculating the waveform width retention rate based on the first waveform width of the reference magnet 32.
- the corrected waveform width of the rubber magnet 3 can be calculated by the following equation.
- Waveform width of rubber magnet 3 after correction Waveform width of rubber magnet 3 before correction / Waveform retention rate of reference magnet 32
- the waveform width of the rubber magnet 3 can be corrected based on the waveform width retention rate of the reference magnet 32, so the distance between the magnetic sensor 4 and the rubber magnet 3 at the time of measurement, Even when the waveform width of the sensor output fluctuates due to a change in the belt running speed of the conveyor belt 30 or the like, the error in the output waveform due to the fluctuation is corrected as described above, so that accurate measurement is always performed. A result can be obtained and the possibility of a decrease in measurement accuracy can be advantageously eliminated.
- the reference magnet 32 needs to be arranged at a certain distance from each of the rubber magnet 3 and the trigger magnet 31 so as not to interfere with the magnetic field of the rubber magnet 3 and the magnetic field of the trigger magnet 31.
- illustration is omitted, it is also possible to arrange the reference magnet on the front side of the rubber magnet in the traveling direction of the conveyor belt.
- the reference magnet 32 is not limited to being embedded in the front side surface 30a side where the trigger magnet 31 and the rubber magnet 3 are arranged, and is opposite to the trigger magnet 31 and the rubber magnet 3 with the reinforcing material 5 interposed therebetween. It may be embedded in close contact with the reinforcing material surface on the inner peripheral side (upper side in the figure) of the conveyor belt 30.
- the reference magnet 32 is preferably formed to be thinner than the rubber magnet 3 so that the volume is not reduced by wear until reaching the belt wear limit when the conveyor belt 30 is replaced. By reducing the thickness, the reference magnet 32 is covered with the rubber portion constituting the conveyor belt 30 even when the inclined portion 21 of the rubber magnet 3 is all removed and the parallel portion 22 begins to be removed. As a result, it is possible to prevent the reference magnet 32 itself from being worn. That is, when the thickness (for example, 1 mm) of the reference magnet 32 is t, for example, the thickness of the rubber magnet 3 is preferably 1.5 t. In this case, the thickness of the trigger magnet 31 can be set to 3.0 t.
- the cross section along the belt traveling direction is an upper opening.
- the reinforcing material 5 is exposed by peeling off so as to form a concave portion that expands toward the diameter, and the trigger magnet 31 and the reference magnet 32 are integrally formed with the unvulcanized rubber together with the rubber magnet 3 in accordance with the shape of the concave portion.
- the unvulcanized conveyor belt can be vulcanized together with the magnet placement rubber parts fitted in the recesses.
- the rubber magnet 3, the trigger magnet 31, and the reference magnet 32 may be disposed in at least one place in the circumferential direction of the conveyor belt 30 as a set.
- FIG. 9 is an explanatory diagram showing a schematic configuration in the belt width direction of the conveyor belt wear detecting device using the conveyor belt of FIG.
- the conveyor belt wear detection device shown in FIG. 9 is based on the rubber magnet 3 disposed on the conveyor belt 30, the magnetic sensor 4 for detecting the magnetic field from the rubber magnet 3, and the belt wear based on the sensor output input from the magnetic sensor 4.
- a calculation unit 33 for calculating the quantity a plurality of magnetic sensors 4 are attached at substantially equal intervals (for example, 50 mm pitch) in the belt width direction to a sensor fixing frame 34a provided at a lower portion of the conveyor frame 34 that supports the conveyor belt 30 so that the belt can run freely.
- twelve magnetic sensors 4 are arranged to face the front side surface 30a and be separated from the front side surface 30a by a predetermined distance d (for example, 60 mm).
- the calculating part 33 can be set as the structure similar to the calculating part 20 described in 1st Embodiment.
- the trigger magnet 31 passes over the magnetic sensor 4, and the detection of the magnetic field of the rubber magnet 3 by the magnetic sensor 4 is started.
- the magnet 3 passes over the magnetic sensor 4, the magnetic sensor 4 detects the magnetic field generated by the rubber magnet 3, and then the reference magnet 32 passes over the magnetic sensor 4.
- the wear of the conveyor belt 30 starts to progress from the front side surface 30a on which the object to be conveyed is placed during the conveyor conveyance by the belt traveling, the direction from the reinforcing material 5 side to the front side surface 30a along the belt traveling direction.
- the rubber magnet 3 that is inclined is scraped from the outer end 3b located on the front side surface 30a side, so that the distance between the inclined portion 21 of the rubber magnet 3 and the magnetic sensor 4 gradually increases with time. Accordingly, the strength of the magnetic field that changes depending on the distance between the rubber magnet 3 and the magnetic sensor 4 gradually decreases.
- FIG. 10 is an explanatory diagram that graphically represents changes in sensor output values over time when the conveyor belt of FIG. 7 is used.
- the horizontal axis represents time [S] when the magnetic field is detected
- the vertical axis represents sensor output [V].
- the illustrated graph shows a wear determination portion of the sensor output value from the magnetic sensor 4 disposed 60 [mm] away from the front side surface 30a of the conveyor belt 30 in the conveyor belt 30 traveling at a speed of 20 [m / min]. Is an output waveform.
- the detection of the magnetic field by the magnetic sensor 4 can be performed every time the rubber magnet 3 passes the magnetic sensor 4, or can be performed once every plural times. Further, when the outer end 3b of the rubber magnet 3 is not exposed on the front side surface 30a of the conveyor belt 30, the detection of the magnetic field may be started after the front side surface 30a is worn by a certain amount and the outer end 3b is exposed. preferable.
- the output waveform from the magnetic sensor 4 starts to rise when the parallel part 22 of the rubber magnet 3 approaches the magnetic sensor 4, and detects the magnetic field of the entire rubber magnet 3 as it approaches the inclined part 21.
- the outer end 3 b approaches the magnetic sensor 4 it rises in a curved shape due to a decrease in the distance between the outer end 3 b and the magnetic sensor 4, and the maximum magnetic force is reached when the outer end 3 b passes the magnetic sensor 4.
- the outer end 3b moves away from the magnetic sensor 4, so that the outer end 3b descends in a curved shape due to an increase in the distance between the magnetic sensor 4 and the rubber magnet 3 facing the magnetic sensor 4.
- the output waveform s indicates a state in which the rubber magnet 3 including the inclined portion 21 and the parallel portion 22 is almost worn out
- the output waveform c from the output waveform a is a state in which the inclined portion 21 is not worn
- Each of the three output waveforms detected from the output waveform a) to the state where the wear of the inclined portion 21 has greatly progressed (output waveform c) is shown, and a specific sensor output value larger than the sensor output value of the output waveform s t indicates a preset threshold value.
- the threshold value t is within the range of 3.0 V to 4.0 V in the case of the reinforcing material 5 made of steel cord with the sensor output value 2.5 V as a reference.
- the output value can be set in the range of 2.7 V to 3.0 V.
- the waveform width Rx at a preset threshold value t that is, the output waveform b
- the waveform detection time from the time when the gradually increasing output value exceeds the threshold t to the time when the output value gradually decreasing after the peak falls below the threshold t is measured.
- the ratio (Rx / R0) of the waveform width Rx described above to the initial waveform width R0 at the threshold value t of the output waveform a when the conveyor belt 30 is not worn is calculated.
- a function D f (Rx / Rx) of the conveyor belt thickness D and the ratio of the waveform width Rx to the initial waveform width R0 (Rx / R0) obtained by conducting an abrasion test or the like in advance.
- R0 is used to calculate the thickness of the conveyor belt 30 corresponding to the specific value of the ratio (Rx / R0) calculated from the actual measurement value, so that the conveyor belt when the magnetic sensor 4 detects the magnetic field.
- a wear amount of 30 can be estimated.
- the conveyor belt length direction of the inclined portion 21 extending in an inclined posture from the outer end 3b to the inner end 3a due to the wear of the inclined portion 21 accompanying the wear of the conveyor belt 30 on the front side surface 30a.
- the shortening of the extension length of the waveform appears as the waveform width Rx of the waveform detected by the magnetic sensor 4, that is, the shortening of the waveform detection time. Therefore, the waveform width Rx as described above with respect to the initial waveform width R0 is displayed.
- the wear of the conveyor belt 30 can be predicted with sufficiently high accuracy.
- the rubber magnet 3 is provided with the parallel portion 22 continuous to the inclined portion 21, so that the wear of the rubber magnet 3 proceeds and the inclined portion 21 is almost eliminated. Even so, since the magnetic field from the parallel portion 22 extending in the length direction of the conveyor belt can be reliably detected in the close contact posture with the reinforcing member 5, the magnetic field due to disappearance of the rubber magnet cannot be detected. Can be effectively prevented.
- the magnetic field detection by the magnetic sensor 4 is automatically performed by the rubber magnet 3 passing through the magnetic sensor 4, so the traveling of the conveyor belt 30 is stopped and the conveyor belt 30 is stopped. It is possible to know the thickness of the conveyor belt 30 and thus the wear state of the conveyor belt 30 without interrupting the conveyance work by the belt 30.
- the abrasion detection method demonstrated here is applicable similarly about the conveyor belt 2 of 1st Embodiment.
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Abstract
Description
また、この発明の他の態様に係るコンベアベルト摩耗検出装置は、前記ゴム磁石が、磁性粉をゴム材料マトリックス内に分散させて磁化させて形成されていることを特徴としている。
以下、本発明の実施形態を、図面を参照して説明する。図3は、本発明の第1の実施形態に係るコンベアベルト摩耗検出装置のコンベアベルトの側面図、図4は、図3のb部分の拡大断面図、図5は、図3のC-C矢視に対応する矢視図である。
図7は、本発明の第2の実施形態によるコンベアベルトのベルト長手方向に沿う断面図である。図7に示すように、コンベアベルト30は、ゴム磁石3の、ベルト長手方向の両側にそれぞれ、トリガ磁石31と基準磁石32を、ベルト芯体である補強材5に密着させて表側面30a側に埋設した状態で配置したことを除いて、第1の実施形態によるコンベアベルト2(図4参照)と同様の構成を有する。
かかるトリガ磁石31は、磁気センサ4による自身の磁界検出をもって、磁気センサ4がゴム磁石3の磁界の検出を開始するきっかけとして機能する。
なお、3回目以降も同様にして、1回目の、基準磁石32の波形幅を基準として、波形幅保持率を算出することにより補正することができる。
補正後のゴム磁石3の波形幅
=補正前のゴム磁石3の波形幅 / 基準磁石32の波形幅保持率
また、基準磁石32は、トリガ磁石31及びゴム磁石3が配置された表側面30a側に埋設される場合に限るものではなく、トリガ磁石31及びゴム磁石3とは補強材5を挟んで反対側となる、コンベアベルト30の内周側(図では上側)の補強材表面に密着させて埋設しても良い。
つまり、基準磁石32の厚み(例えば、1mm)をtとした場合、例えば、ゴム磁石3の厚みは1.5tとすることが好ましい。なお、この場合、トリガ磁石31の厚みは3.0tとすることができる。
なお、ゴム磁石3、トリガ磁石31及び基準磁石32は、これらを一組として、コンベアベルト30の周方向の少なくとも一箇所に配置されていれば良い。
図9は、図7のコンベアベルトを用いたコンベアベルト摩耗検出装置の、ベルト幅方向の概略構成を示す説明図である。図9に示すコンベアベルト摩耗検出装置は、コンベアベルト30に配置されたゴム磁石3と、ゴム磁石3からの磁界を検出する磁気センサ4と、磁気センサ4から入力したセンサ出力に基づいてベルト摩耗量を演算する演算部33とを具える。
ここで、磁気センサ4は、コンベアベルト30をベルト走行自在に支持するコンベアフレーム34の下部に設けたセンサ固定フレーム34aに、ベルト幅方向に略等間隔(例えば、50mmピッチ)で複数個取り付けられており、ここでは12個とした磁気センサ4は何れも、表側面30aに対向させるとともに、表側面30aから所定距離d(例えば、60mm)で離隔させて配置されている。
なお、演算部33は、第1の実施形態で述べた演算部20と同様の構成とすることができる。
ここで、ベルト走行によるコンベア搬送時に被搬送物が載置される表側面30aからコンベアベルト30の摩耗が進行し始めると、ベルト走行方向に沿い補強材5側から表側面30aへと向かうように傾斜配置されたゴム磁石3は、表側面30a側に位置する外側端3bから削られて行くので、時間の経過に伴って、ゴム磁石3の傾斜部21と磁気センサ4との距離が徐々に長くなり、それによって、ゴム磁石3と磁気センサ4との距離に依存して変化する磁界の強さも徐々に弱くなる。
図示のグラフは、速度20[m/min]で走行するコンベアベルト30において、コンベアベルト30の表側面30aから60[mm]離間させて配置した磁気センサ4からのセンサ出力値の、摩耗判定部分の出力波形である。
なお、この磁気センサ4による磁界の検出は、ゴム磁石3が磁気センサ4を通過する度に毎回行うことができる他、複数回に1回行うことも可能である。また、コンベアベルト30の表側面30aにゴム磁石3の外側端3bが露出していない場合は、表側面30aが一定量摩耗して外側端3bが露出した後に、磁界の検出を開始することが好ましい。
次いで、コンベアベルト30に摩耗が生じていない状態での出力波形aの、閾値tにおける初期波形幅R0に対する、上述した波形幅Rxの比(Rx/R0)を算出する。
しかる後は、たとえば、予め摩耗試験等を実施して得た、コンベアベルトの厚さDと、波形幅Rxの、初期波形幅R0に対する比(Rx/R0)との関数D=f(Rx/R0)を用いて、実測値から算出した前記比(Rx/R0)の具体的数値に対応する、コンベアベルト30の厚さを算出することで、磁気センサ4が磁界を検知した際のコンベアベルト30の摩耗量を推定することができる。
なお、ここで説明した摩耗検出方法は、第1の実施形態のコンベアベルト2についても同様に適用することができる。
2,30 コンベアベルト
2a,30a コンベアベルトの表側面
3 ゴム磁石
3a 傾斜部の内側端
3b 傾斜部の外側端
4 磁気センサ
5 コンベアベルトの補強材
6 スクレーパ
7 幅方向ガイド
8 厚さ方向ガイド
9 送信部
10 現場演算制御部
11 受信部
12 出力端末
13 中央制御部
20 演算部
21 ゴム磁石の傾斜部
22 ゴム磁石の平行部
31 トリガ磁石
32 基準磁石
33 演算部
34 コンベアフレーム
34a センサ固定フレーム
33a センサケーブル
s,a,b,c 出力波形
Claims (5)
- コンベアベルトに埋設されたゴム磁石と、該コンベアベルトの外周側の面を構成する表側面に近接して配置され前記ゴム磁石からの磁界を検知する磁気センサと、該磁気センサからの信号に基づいて前記コンベアベルトの表側面の摩耗量を推定する演算部とを具えた、コンベアベルト摩耗検出装置において、
前記ゴム磁石は、コンベアベルト幅方向に延在し、コンベアベルト長さ方向断面において前記表側面に対して傾斜し前記表側面に近い側の外側端から遠い側の内側端まで直線的に延びる板状の傾斜部と、該傾斜部の前記内側端に連続し前記表側面と平行に配置された板状の平行部とよりなり、前記傾斜部と前記平行部とはともに厚さ方向に磁化されていることを特徴とするコンベアベルト摩耗検出装置。 - 前記傾斜部は、前記内側端が前記外側端よりコンベアベルト進行方向前側となるように配置されていることを特徴とする請求項1に記載のコンベアベルト摩耗検出装置。
- 前記演算部は、前記磁気センサが検知する磁界の時間変化パターンの、特定のセンサ出力値として予め設定した閾値での波形幅をRxとし、コンベアベルトの未摩耗状態における前記時間変化パターンの、前記閾値での初期波形幅をR0とした場合に、前記波形幅Rxの、初期波形幅R0に対する比(Rx/R0)に基き、磁界検知時のコンベアベルトの摩耗量を推定することを特徴とする請求項1もしくは2に記載のコンベアベルト摩耗検出装置。
- 前記ゴム磁石の、コンベアベルト進行方向の前方側もしくは後方側に、前記ゴム磁石が検知した出力波形の波形幅を補正するための基準磁石を配置したことを特徴とする請求項1から3のいずれか一項に記載のコンベアベルト摩耗検出装置。
- 前記ゴム磁石は、磁性粉をゴム材料マトリックス内に分散させて磁化させて形成されていることを特徴とする請求項1から4のいずれか一項に記載のコンベアベルト摩耗検出装置。
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JP2011540417A JP5693464B2 (ja) | 2009-11-11 | 2010-11-11 | コンベアベルト摩耗検出装置 |
AU2010318459A AU2010318459B2 (en) | 2009-11-11 | 2010-11-11 | Conveyor belt wear detection apparatus |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015111418A1 (ja) | 2014-01-27 | 2015-07-30 | 株式会社ブリヂストン | センサー及びモニタリングシステム |
US9950484B2 (en) * | 2013-02-27 | 2018-04-24 | Bridgestone Corporation | Manufacturing method of finite conveyor belt, joining method of finite conveyor belt, manufacturing method of endless conveyor belt, and conveyor belt apparatus |
US10377574B2 (en) | 2015-04-30 | 2019-08-13 | The Yokohama Rubber Co., Ltd. | Conveyor belt wear monitoring system |
US10829310B2 (en) | 2016-02-29 | 2020-11-10 | Bridgestone Corporation | Wear detection device for conveyor belt |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITMI20111537A1 (it) * | 2011-08-12 | 2013-02-13 | Rexnord Marbett Srl | Sistema di monitoraggio per catene di trasporto di trasportatori di articoli |
JP5957215B2 (ja) * | 2011-12-02 | 2016-07-27 | 株式会社ブリヂストン | コンベヤベルト装置 |
CN102991935B (zh) * | 2012-10-05 | 2015-05-20 | 昆山特力伯传动科技有限公司 | 输送带的磨损指示器 |
CN103913540A (zh) * | 2013-01-04 | 2014-07-09 | 黄平 | 输送带异常磨损定量分析法 |
CN103938329A (zh) * | 2014-04-22 | 2014-07-23 | 湖州申祥丝织有限责任公司 | 一种自动监测的导纱机构 |
US10648554B2 (en) * | 2014-09-02 | 2020-05-12 | Polaris Industries Inc. | Continuously variable transmission |
JP6432291B2 (ja) * | 2014-11-10 | 2018-12-05 | 横浜ゴム株式会社 | コンベヤベルトの摩耗モニタリングシステム |
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CN111392364B (zh) * | 2020-03-23 | 2021-03-23 | 武汉理工大学 | 一种循环式多功能带式输送机测试平台 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007029698A (ja) | 2005-07-21 | 2007-02-08 | Michiko Wakui | お尻の床ずれ防止クッション |
WO2009028667A1 (ja) * | 2007-08-31 | 2009-03-05 | Kabushiki Kaisha Bridgestone | コンベヤベルトの摩耗状態検出装置 |
JP2009258101A (ja) | 2008-03-28 | 2009-11-05 | Osaka City Univ | 二次元分布を測定する方法及び装置 |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU455679B2 (en) * | 1970-09-07 | 1974-11-21 | Bando Kagaku Co. Ltd. | Conveyor belt apparatus |
GB1487978A (en) * | 1974-09-12 | 1977-10-05 | Bando Chemical Ind | Safety device for conveyor belt |
JPH1025658A (ja) * | 1996-05-10 | 1998-01-27 | Ykk Corp | 非磁性製品中の磁性体の検知方法及び検知装置 |
CN2309319Y (zh) * | 1997-10-27 | 1999-03-03 | 刘士一 | 带式输送机横向断带监测装置 |
JP2004035115A (ja) * | 2002-06-28 | 2004-02-05 | Yazaki Corp | 送りベルト |
US6715602B1 (en) * | 2002-11-15 | 2004-04-06 | The Goodyear Tire & Rubber Company | Sensor system for conveyor belt |
JP2006156423A (ja) * | 2003-07-09 | 2006-06-15 | Bridgestone Corp | ゴム磁石シートおよびゴム磁石シートの製造方法 |
WO2005005292A1 (ja) * | 2003-07-09 | 2005-01-20 | Bridgestone Corporation | コンベアベルトの伸び測定方法および伸び測定装置、コンベアベルトの摩耗度合測定方法およびコンベアベルト摩耗度合測定装置、コンベアベルトの温度測定方法およびコンベアベルト温度測定装置、ならびに、ゴム磁石シートおよびゴム磁石シートの製造方法 |
JP4512694B2 (ja) * | 2004-12-16 | 2010-07-28 | 伊東電機株式会社 | コンベアユニットおよびゾーン制御式コンベアシステム |
JP4932222B2 (ja) * | 2005-04-13 | 2012-05-16 | 株式会社ブリヂストン | コンベヤベルトの摩耗検出装置 |
CN101277882B (zh) * | 2005-09-07 | 2011-06-01 | 株式会社普利司通 | 传送带的磨损检测装置 |
US7494004B2 (en) * | 2006-06-23 | 2009-02-24 | Siemens Energy & Automation, Inc. | Method and apparatus for monitoring conveyor belts |
JP5358438B2 (ja) * | 2007-07-18 | 2013-12-04 | 株式会社ブリヂストン | コンベアベルトのモニタリングシステム |
JP5258306B2 (ja) * | 2008-01-16 | 2013-08-07 | 株式会社ブリヂストン | ベルトモニタリングシステム |
US7810634B2 (en) * | 2008-08-04 | 2010-10-12 | Veyance Technologies Inc. | Sensor system for a conveyor belt |
WO2010033526A1 (en) * | 2008-09-19 | 2010-03-25 | Fenner Dunlop Americas, Inc. | Conveyor belt rip panels and belt rip monitoring |
-
2010
- 2010-11-11 JP JP2011540417A patent/JP5693464B2/ja not_active Expired - Fee Related
- 2010-11-11 EP EP10829715.1A patent/EP2500295B1/en not_active Not-in-force
- 2010-11-11 US US13/509,202 patent/US8991594B2/en not_active Expired - Fee Related
- 2010-11-11 WO PCT/JP2010/006643 patent/WO2011058755A1/ja active Application Filing
- 2010-11-11 CN CN201080058015.3A patent/CN102666319B/zh not_active Expired - Fee Related
-
2012
- 2012-05-10 CL CL2012001224A patent/CL2012001224A1/es unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007029698A (ja) | 2005-07-21 | 2007-02-08 | Michiko Wakui | お尻の床ずれ防止クッション |
WO2009028667A1 (ja) * | 2007-08-31 | 2009-03-05 | Kabushiki Kaisha Bridgestone | コンベヤベルトの摩耗状態検出装置 |
JP2009258101A (ja) | 2008-03-28 | 2009-11-05 | Osaka City Univ | 二次元分布を測定する方法及び装置 |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9950484B2 (en) * | 2013-02-27 | 2018-04-24 | Bridgestone Corporation | Manufacturing method of finite conveyor belt, joining method of finite conveyor belt, manufacturing method of endless conveyor belt, and conveyor belt apparatus |
WO2015111418A1 (ja) | 2014-01-27 | 2015-07-30 | 株式会社ブリヂストン | センサー及びモニタリングシステム |
CN105934397A (zh) * | 2014-01-27 | 2016-09-07 | 株式会社普利司通 | 传感器和监测系统 |
EP3100965A1 (en) * | 2014-01-27 | 2016-12-07 | Bridgestone Corporation | Sensor, and monitoring system |
JPWO2015111418A1 (ja) * | 2014-01-27 | 2017-03-23 | 株式会社ブリヂストン | センサー及びモニタリングシステム |
EP3100965A4 (en) * | 2014-01-27 | 2017-04-05 | Bridgestone Corporation | Sensor, and monitoring system |
US9766208B2 (en) | 2014-01-27 | 2017-09-19 | Bridgestone Corporation | Sensor, and monitoring system |
AU2015210253B2 (en) * | 2014-01-27 | 2017-10-19 | Bridgestone Corporation | Sensor and monitoring system |
US10377574B2 (en) | 2015-04-30 | 2019-08-13 | The Yokohama Rubber Co., Ltd. | Conveyor belt wear monitoring system |
US10829310B2 (en) | 2016-02-29 | 2020-11-10 | Bridgestone Corporation | Wear detection device for conveyor belt |
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EP2500295B1 (en) | 2017-08-02 |
EP2500295A4 (en) | 2015-05-27 |
US20120306481A1 (en) | 2012-12-06 |
CN102666319B (zh) | 2014-07-30 |
US8991594B2 (en) | 2015-03-31 |
JP5693464B2 (ja) | 2015-04-01 |
AU2010318459A1 (en) | 2012-05-31 |
CL2012001224A1 (es) | 2012-12-14 |
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