CN118062520A - Detection system for longitudinal tear crack of mineral conveyor belt - Google Patents
Detection system for longitudinal tear crack of mineral conveyor belt Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 158
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 37
- 239000011707 mineral Substances 0.000 title claims abstract description 37
- 239000000523 sample Substances 0.000 claims abstract description 238
- 238000010586 diagram Methods 0.000 claims abstract description 36
- 230000005540 biological transmission Effects 0.000 claims abstract description 33
- 238000012545 processing Methods 0.000 claims abstract description 12
- 238000004458 analytical method Methods 0.000 claims abstract description 7
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- 238000009434 installation Methods 0.000 claims description 34
- 238000012937 correction Methods 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 abstract description 28
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- 239000000463 material Substances 0.000 description 6
- 238000009825 accumulation Methods 0.000 description 4
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- 230000003321 amplification Effects 0.000 description 3
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 239000004696 Poly ether ether ketone Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920002530 polyetherether ketone Polymers 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Abstract
The invention relates to a detection system for a longitudinal tear seam of a mineral conveyor belt, which is characterized in that an ultrasonic detector is arranged on the lower surface of a conveyor section of the conveyor belt, so that the transmission range of ultrasonic waves emitted by a transmitting probe wheel covers the width direction of the conveyor section of the conveyor belt, a receiving probe wheel continuously acquires echoes in at least one conveying length period of the conveyor belt, the conveying mileage of the conveyor belt is coded and recorded in real time through an encoder, and the longitudinal tear seam of the conveyor belt is effectively detected in the process of conveying operation; and then the receiving condition of each receiving probe wheel and the mileage record of the encoder are obtained through the data reading processing analysis equipment, and a waveform envelope diagram of 'the highest wave amplitude of the conveying mileage-ultrasonic wave' is drawn so as to present the transmission condition of the ultrasonic wave on the conveying belt, and then whether the conveying belt has a longitudinal tear crack or not is judged according to the shape of the waveform envelope diagram, so that the detection efficiency and the detection accuracy are improved.
Description
Technical Field
The invention relates to the technical field of ultrasonic detection, in particular to a detection system for a longitudinal tear seam of a mineral conveyor belt.
Background
Conveyor belts are life lines of the mining industry for conveying and transporting various minerals. Minerals are stacked on the conveyor belt during the handling process, and can cause great wear on the upper surface of the conveyor belt, even with the occurrence of longitudinal tear seams. If the operation is continued without timely finding the longitudinal tearing seam, the longitudinal tearing seam can be gradually torn and finally lead to the tearing of the conveying belt, and the whole conveying belt and on-board equipment can be lifted by strong elastic force during the tearing, so that serious production safety accidents are caused.
At present, the technology blank still exists in the aspect of ultrasonic detection for a mineral conveying belt in China, and the upper surface of the conveying belt is mainly photographed and identified through a high-speed intelligent camera. Because the longitudinal tear seam is hidden and difficult to identify, and only occurs on the upper surface of the conveying section of the conveying belt, when the conveying belt is in the operation process of conveying minerals, the minerals are very likely to cover the whole longitudinal tear seam on the outer surface of the conveying belt, so that the high-speed intelligent camera cannot timely detect the longitudinal tear seam, and the detection result of the conveying belt is greatly influenced.
In addition, in the detection process of the longitudinal tear seam, besides the detection precision of the longitudinal tear seam can be influenced by mineral stacking, the positioning precision of the position of the conveyor belt joint can also influence the detection precision of the longitudinal tear seam. In the actual detection process, as the conveyor belt for the mine site can be as long as more than 20km, the conveyor belt is provided with a joint every 200m, the joint part can generate false alarm for the identification of the longitudinal tear seam, and the detection precision of the longitudinal tear seam is seriously affected by multiple false alarms, so that the joint part of the conveyor belt needs to be accurately positioned in the detection process of the longitudinal tear seam, and the shutdown inspection workload generated by the false alarm of the detection of the longitudinal tear seam is reduced.
On the other hand, since the conveyor belt is a circulating conveyor job, it is necessary to record the real-time position of the conveyor belt by an encoder during the detection. However, the existing encoder cannot completely eliminate errors after calibration, although the encoder calibration method in the related industry standard can calibrate errors within 1% within 500m, the length of a mineral conveyor belt is within 20-40 km, the mineral conveyor belt does not stop for multiple circle circulation operation, the encoder errors can be accumulated and amplified, position information coding records are invalid due to accumulation and accumulation of daily periods, moreover, the mineral conveyor belt vibration can be caused in the conveying process, the coding wheel of the encoder is suspended instantaneously, coding information errors are further increased, and the detection efficiency and detection precision of longitudinal tear cracks are further affected.
Disclosure of Invention
The invention aims to solve the problem that the detection system for the longitudinal tear seam of the mineral conveyor belt can effectively detect the longitudinal tear seam of the conveyor belt in the transportation operation process, and improves the detection efficiency and the detection accuracy. The technical scheme adopted is as follows:
a detection system for a mineral conveyor belt longitudinal tear seam, comprising:
The ultrasonic detector is arranged on the lower surface of the conveying section of the conveying belt and comprises at least two detection wheels, each detection wheel comprises at least one emission detection wheel and at least one receiving detection wheel, each detection wheel is contacted with the lower surface of the conveying section of the conveying belt, the transmission range of ultrasonic waves emitted by the emission detection wheel covers the width direction of the conveying section of the conveying belt, and the conveying belt keeps downward pressure on the wheel surface of each detection wheel during detection; the transmitting probe wheel transmits ultrasonic waves, and the receiving probe wheel continuously acquires echoes in at least one conveying length period of the conveying belt;
The encoder is used for carrying out real-time coding recording on the conveying mileage of the conveying belt and carrying out self-calibration and correction when the conveying mileage of the conveying belt is recorded in a real-time coding manner;
the data reading, processing and analyzing equipment is used for acquiring the receiving condition of each receiving detection wheel and the mileage record of the encoder, drawing a waveform envelope diagram of 'the highest wave amplitude of the conveying mileage-ultrasonic waves' so as to present the transmission condition of the ultrasonic waves on the conveying belt, and judging whether the conveying belt has a longitudinal tear crack according to the shape of the waveform envelope diagram.
The number of the transmitting probe wheels and the receiving probe wheels of the ultrasonic detector is determined according to actual requirements, so long as the transmission range of ultrasonic waves sent by the transmitting probe wheels can cover the width direction of the conveying section of the conveying belt, and the conveying belt is ensured to be in the receiving range of the receiving probe wheels in the circulating conveying process. Since the conveyor belt is circularly and continuously conveyed, the detection period needs to be at least one detection time of the conveying length period, and the whole conveyor belt is detected at one time.
The encoder is used for carrying out real-time coding record on the conveying mileage of the conveying belt, and because the existing encoder cannot completely eliminate errors after calibration, although the encoder calibration method in the related industry standard can calibrate the errors within 1% within 500m, the length of the mineral conveying belt is within 20-40 km, the encoder does not stop for multiple-circle circulating operation, the encoder errors can be accumulated and amplified, the position information coding record is disabled under the accumulation of daily accumulation, and the encoder carries out self calibration and correction when carrying out real-time coding record on the conveying mileage of the conveying belt.
The data reading processing analysis equipment acquires the receiving condition of each receiving detection wheel and the mileage record of the encoder, draws a waveform envelope diagram of 'the highest wave amplitude of the conveying mileage-ultrasonic waves' to present the transmission condition of the ultrasonic waves on the conveying belt, and judges whether the conveying belt has a longitudinal tear crack according to the shape of the waveform envelope diagram.
As a preferable scheme of the invention, the transmitting probe wheel is internally provided with a probe with transmitting and receiving functions, and the receiving probe wheel is internally provided with a probe with receiving functions; when the detection is carried out, the transmitting probe wheel transmits low-frequency ultrasonic waves with strong penetrating power to the receiving probe wheel, and the low-frequency ultrasonic waves are received by the receiving probe wheel after being transmitted along the width direction of the conveying belt; meanwhile, the transmitting probe wheel transmits low-frequency ultrasonic waves of 0 degrees towards the conveying belt, and the low-frequency ultrasonic waves are transmitted in the thickness direction of the conveying belt and then reflected at the interface to be received by the transmitting probe wheel.
In the actual detection process, the joint part of the conveyor belt can generate false alarm for the identification of the longitudinal tear seam, and the detection precision of the longitudinal tear seam is seriously influenced by multiple false alarms, so that the joint part of the conveyor belt is required to be accurately positioned in the longitudinal tear seam detection process, and the shutdown inspection workload generated by the false alarm of the longitudinal tear seam detection is reduced. Because the joint part and the non-joint part of the conveying belt are different in materials and welding process parts, the joint part and the non-joint part of the conveying belt have different acoustic characteristics, the attenuation of ultrasonic waves passing through the joint part is larger than that of the non-joint part under the same ultrasonic detection sensitivity, and the ultrasonic waves can be received differently and different receiving waveforms can be displayed when passing through the non-joint part, the joint part and the longitudinal tear seam. Therefore, the transmitting probe wheel simultaneously transmits the low-frequency ultrasonic wave with strong penetrating power and the low-frequency ultrasonic wave with 0 degree, the low-frequency ultrasonic wave with strong penetrating power passes through the conveying belt and is received by the receiving probe wheel, the low-frequency ultrasonic wave with 0 degree passes through the thickness direction of the conveying belt and is automatically received by the transmitting probe wheel, and whether the transmitting probe wheel and the receiving probe wheel are positioned at the joint part of the conveying belt at the moment is judged according to the difference of waveform envelope diagrams.
As a further preferable scheme of the invention, the data reading processing analysis equipment carries out the following judgment according to the drawn waveform envelope diagrams of the transmission mileage-ultrasonic highest amplitude of the transmission probe wheel and the receiving probe wheel:
(1) When the oscillograms of the transmitting probe wheel and the receiving probe wheel are stable and have high amplitude, the transmitting probe wheel and the receiving probe wheel are regarded as the transmitting probe wheel and the receiving probe wheel to pass through the non-joint part of the conveying belt, and no longitudinal tearing crack exists on the passing conveying belt;
(2) When the waveform diagram of the transmitting probe wheel is stable and high-amplitude, and the waveform diagram of the receiving probe wheel is low-amplitude, the transmitting probe wheel and the receiving probe wheel are regarded as passing through the non-joint part of the conveying belt, and a longitudinal tearing seam exists on the passing conveying belt;
(3) When the oscillograms of the transmitting probe wheel and the receiving probe wheel are low in amplitude, the transmitting probe wheel and the receiving probe wheel are regarded as passing through the joint part of the conveying belt.
When the waveform diagrams of the transmitting probe wheel and the receiving probe wheel are stable and have high amplitude, the transmitting probe wheel and the receiving probe wheel can normally receive ultrasonic waves, and the transmitting probe wheel and the receiving probe wheel pass through the non-joint part and the conveying belt is normal. When the waveform diagram of the transmitting probe wheel is stable and high in amplitude, and the waveform diagram of the receiving probe wheel is low in amplitude, the transmitting probe wheel can normally receive ultrasonic waves, the receiving probe wheel cannot receive the ultrasonic waves, the receiving probe wheel receives the low-frequency ultrasonic waves with strong penetrating power after the transmitting probe wheel transmits the ultrasonic waves to pass through the conveying belt, if the receiving probe wheel cannot receive the ultrasonic waves, the receiving probe wheel indicates that a longitudinal tearing seam exists at a corresponding position on the conveying belt, and the longitudinal tearing seam blocks the ultrasonic waves transmitted by the transmitting probe wheel to the receiving probe wheel. When the wave patterns of the transmitting probe wheel and the receiving probe wheel are low-amplitude, the transmitting probe wheel and the receiving probe wheel can not receive ultrasonic waves, and the transmitting probe wheel can not normally receive echo no matter the transmitting probe wheel transmits high-penetrating-force low-frequency ultrasonic waves towards the receiving probe wheel or transmits 0-degree low-frequency ultrasonic waves towards the conveying belt under the same ultrasonic detection sensitivity, and the displayed wave amplitude is lower than that of the transmitting probe wheel and the receiving probe wheel, so that the transmitting probe wheel and the receiving probe wheel can be judged to pass through the joint part of the conveying belt.
As a preferred embodiment of the present invention, the encoder includes the following steps when performing self-calibration and correction:
(a) Recording the positions of the transmitting probe wheel and the receiving probe wheel when passing through the joint part each time;
(b) Recording the pulse number of the encoder when the transmitting detecting wheel and the receiving detecting wheel pass through the adjacent joint parts twice;
(c) Dividing the joint spacing by the number of pulses to obtain a distance represented by each pulse of the encoder;
(d) And (3) collecting and metering the pulse number of the encoder, and when the pulse number is in a specified proportion, transmitting the probe wheel and receiving the probe wheel to pass through the next joint part, recording the position information of the conveying mileage and automatically rounding according to a multiple of the joint spacing.
In general, the distance between two adjacent joint parts of the conveyor belt (i.e. the joint distance) is constant (typically 200 m), the transmission mileage of the transmitting probe wheel and the receiving probe wheel in one joint distance is passed, and the pulse number of the encoder is basically fixed, so that the distance represented by each pulse of the encoder can be obtained through the joint distance and the pulse number. On the basis, the pulse number of the encoder is acquired and measured, when the conveying belt is uneven or idle running is caused by suspension of vibration of the encoding wheel, the pulse number of the encoder is lost, when the pulse number is lost to reach a specified proportion, when the transmitting detecting wheel and the receiving detecting wheel pass through the next joint part, the position information of the recorded conveying mileage is automatically rounded according to a multiple of the joint distance, and self-calibration and correction are automatically completed once.
Because the operation environment of the conveying belt is very noisy, the ultrasonic attenuation is too large, and in order to improve the energy of the ultrasonic waves, the ultrasonic waves can be normally transmitted and received, and as a preferable scheme of the invention, the detection probe wheel amplifies the power of the ultrasonic waves when transmitting or receiving the ultrasonic waves. When the power of the ultrasonic wave is amplified, the pre-amplifier is combined with the power amplifying host to amplify the transmitted or received ultrasonic wave, so that the accuracy of detection and the drawing effect of a waveform envelope graph are ensured.
As a preferred scheme of the invention, the ultrasonic detector comprises a main frame body and at least two sub-frame bodies which can adjust the distance between the lower surface of the conveying section of the conveying belt and the detection wheel, wherein the sub-frame bodies are fixedly arranged on the main frame body, the main frame body comprises a supporting part, a horizontal installation part and two inclined installation parts, the horizontal installation part is arranged on the supporting part, the horizontal installation part is arranged between the two inclined installation parts, and the two inclined installation parts incline upwards from the middle to two sides; the sub-frame body is arranged on the horizontal installation part or the inclined installation part, and each detection wheel is respectively arranged on the corresponding sub-frame body.
Because the conveying belt is in the conveying operation, the mineral is mainly placed in the middle of the conveying belt, and the pressure of bearing the mineral on the upper surface of the conveying section of the conveying belt is gradually reduced from the middle to two sides, so that the upper surface of the conveying section of the conveying belt is deformed to form an inverted trapezoid structure. Because the longitudinal tearing seam of the conveying belt occurs on the upper surface of the conveying section of the conveying belt, the detection wheel is required to be contacted with the lower surface of the conveying section of the conveying belt during detection, and therefore, the main frame body provided with the detection wheel adopts a structure with the middle horizontal and two inclined sides, so that the shape of the whole main frame body is matched with that of the conveying section of the conveying belt in the mineral conveying process.
In a specific scheme, the main frame body comprises two support columns, two inclined mounting columns and a horizontal mounting column, wherein the two support columns are used as the support parts together, the two inclined mounting columns are respectively used as the inclined mounting parts correspondingly, and the horizontal mounting column is used as the horizontal mounting part; the two support columns are oppositely arranged, the two inclined mounting columns are oppositely inclined, the upper ends of the two inclined mounting columns are respectively connected with the upper ends of the corresponding support columns, the two ends of the horizontal mounting column are respectively connected with the lower ends of the corresponding inclined mounting columns, and the horizontal mounting column and the two inclined mounting columns are positioned in the same length direction. The main frame body is formed by two support columns, two inclined mounting columns and a horizontal mounting column and is similar to an M-shaped frame body structure, and when the main frame body is mounted, the main frame body is mounted between a conveying section and a return section of a conveying belt, and the plane of the whole frame body structure is perpendicular to the conveying direction of the conveying section.
The separation frame body is provided with the distance between the lower surface of the conveying section of the conveying belt and the detection wheel, and a proper adjusting mode can be selected according to actual requirements. As a further preferable scheme of the invention, the sub-frame body comprises a fixed seat, a clamping assembly, a height adjusting assembly, a self-adjusting swinging assembly and a detection wheel bracket; the fixed seat is fixed on the horizontal installation part or the inclined installation part through the clamping component, the height adjusting component is movably matched with the corresponding horizontal installation part or the inclined installation part, and the adjusting end of the height adjusting component is connected with the fixed seat; the fixed end of the self-adjusting swinging component is arranged on the fixed seat, and the detection wheel bracket is arranged on the movable end of the self-adjusting swinging component. According to the detection requirement, the fixing seat is fixedly arranged on the horizontal installation part or the inclined installation part through the clamping component, the detection wheel is arranged on the corresponding detection wheel support, and then the height of the fixing seat is adjusted through the height adjusting component, so that the detection wheel is in contact fit with the lower surface of the conveying section of the conveying belt. In the detection process, the conveying belt drives the detection wheel to rotate, the conveying belt applies downward pressure to the detection wheel, and the self-adjustment swinging assembly carries out self adjustment, so that the detection wheel and the lower surface of the conveying section of the conveying belt keep certain pressure.
As a preferable scheme of the invention, the probe in the detection wheel is provided with a convex detection surface, the inner side surface of the wheel skin of the detection wheel is provided with an annular concave surface matched with the detection surface along the circumferential direction of the detection surface, a gap exists between the detection surface and the annular concave surface, and the outer side surface of the wheel skin of the detection wheel is provided with an annular convex surface matched with the annular concave surface; the wheel skin of the detection wheel is hard skin. In the conveying operation process, the acoustic attenuation of the mineral conveying belt is overlarge, so that the detection surface of the probe is designed to be convex, ultrasonic waves can be focused, the detection wheel is used for transmitting or receiving, the energy transfer of the ultrasonic waves between the detection surface of the probe and the surface of the conveying section of the conveying belt is improved, and the detection efficiency and the detection precision of the detection wheel are improved. Correspondingly, an annular concave surface matched with the detection surface is arranged on the inner side surface of the wheel skin of the detection wheel along the circumferential direction of the inner side surface of the wheel skin of the detection wheel, an annular convex surface matched with the annular concave surface is arranged on the outer side surface of the wheel skin of the detection wheel, a gap exists between the detection surface and the annular concave surface, and friction between the wheel skin of the detection wheel and the detection surface in the rolling process of the detection wheel is avoided.
Because the detection wheel keeps long-time friction with the lower surface of the conveying section of the conveying belt in the conveying operation process of the conveying belt, in order to ensure the detection effect, the service life of the detection wheel is prolonged, and the wheel skin of the detection wheel is hard, so that the wear resistance of the wheel skin is improved. In a specific scheme, polyether-ether-ketone can be selected as a material of the wheel cover, and has good acoustic performance and wear resistance. Of course, other materials with high sound velocity, low attenuation, corrosion resistance, radiation resistance and the like can also be used as materials of the wheel cover.
The gap width between the detection surface and the annular concave surface is preferably set to be 0.43-0.6 mm, so that the detection surface of the probe is close to the annular concave surface as much as possible.
Compared with the prior art, the invention has the following advantages:
According to the detection system for the longitudinal tear seam of the mineral conveyor belt, the ultrasonic detector is arranged on the lower surface of the conveying section of the conveyor belt, so that the transmission range of ultrasonic waves emitted by the emission probe wheel covers the width direction of the conveying section of the conveyor belt, the receiving probe wheel continuously acquires echoes in at least one conveying length period of the conveyor belt, the conveying mileage of the conveyor belt is coded and recorded in real time through the encoder, and the longitudinal tear seam of the conveyor belt is effectively detected in the conveying operation process; and then the receiving condition of each receiving probe wheel and the mileage record of the encoder are obtained through the data reading processing analysis equipment, and a waveform envelope diagram of 'the highest wave amplitude of the conveying mileage-ultrasonic wave' is drawn so as to present the transmission condition of the ultrasonic wave on the conveying belt, and then whether the conveying belt has a longitudinal tear crack or not is judged according to the shape of the waveform envelope diagram, so that the detection efficiency and the detection accuracy are improved.
Drawings
FIG. 1 is a schematic diagram of a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating the operation of an ultrasonic detector in accordance with a preferred embodiment of the present invention;
FIG. 3 is a schematic view showing the structure of an ultrasonic detector according to a preferred embodiment of the present invention;
FIG. 4 is a schematic view of the split frame in FIG. 3;
FIG. 5 is a side view of FIG. 4;
FIG. 6 is an internal cross-sectional view of the inspection probe wheel of FIG. 4;
FIG. 7 is a flow chart of the operation of the preferred embodiment of the present invention;
FIG. 8 is a schematic diagram showing the propagation of ultrasonic waves from the transmitting probe wheel to the receiving probe wheel when the transmitting probe wheel and the receiving probe wheel normally pass through the non-joint part of the conveying belt;
FIG. 9 is a schematic diagram showing the propagation of ultrasonic waves emitted from the emitting probe wheel to the thickness direction of the conveyor belt when the emitting probe wheel and the receiving probe wheel normally pass through the non-joint part of the conveyor belt;
FIG. 10 is a waveform envelope diagram of the "transmission mileage-ultrasonic highest amplitude" of the transmitting probe wheel when the transmitting probe wheel and the receiving probe wheel normally pass through the non-joint part of the transmission belt;
FIG. 11 is a waveform envelope diagram of the "transmission mileage-ultrasonic highest amplitude" of the receiving probe wheel when the transmitting probe wheel and the receiving probe wheel normally pass through the non-joint part of the transmission belt;
FIG. 12 is a schematic diagram showing the propagation of ultrasonic waves emitted from the emitting probe wheel to the receiving probe wheel and the thickness direction of the conveyor belt when the emitting probe wheel and the receiving probe wheel pass through the non-joint part of the conveyor belt and a longitudinal tear crack exists on the passing conveyor belt;
FIG. 13 is a waveform envelope of the "transmission mileage-ultrasonic highest amplitude" of the transmitting probe wheel when the transmitting probe wheel and the receiving probe wheel pass through a non-joint portion of the conveyor belt and a longitudinal tear crack exists on the conveyor belt passing through;
FIG. 14 is a waveform envelope of the "transmission mileage-ultrasonic highest amplitude" of the receiving probe wheel when the transmitting probe wheel, the receiving probe wheel passes through a non-joint portion of the conveyor belt and a longitudinal tear crack exists on the conveyor belt passing through;
FIG. 15 is a schematic diagram showing the propagation of ultrasonic waves emitted from the transmitting probe wheel to the receiving probe wheel and the thickness direction of the conveying belt when the transmitting probe wheel and the receiving probe wheel pass through the joint part of the conveying belt;
FIG. 16 is a waveform envelope of the "transmission mileage-ultrasonic highest amplitude" of the transmitting probe wheel as the transmitting probe wheel and the receiving probe wheel pass through the joint portion of the transmission belt;
FIG. 17 is a waveform envelope of the "maximum amplitude of ultrasonic waves" of the receiving probe wheel as the transmitting probe wheel and the receiving probe wheel pass through the joint portion of the conveyor belt;
FIG. 18 is an illustration of an encoder undergoing self-calibration and correction;
Wherein each of the marks is as follows: the device comprises a 1-ultrasonic detector, a 2-encoder, a 3-data reading, processing and analyzing device, a 4-conveyor belt, a 5-preamplifier, a 6-power amplifying host and a 7-ultrasonic host; 11-a main frame body, 111-a supporting column, 112-an inclined mounting column and 113-a horizontal mounting column; the device comprises a 12-split frame body, 121-fixed seats, 122-clamping assemblies, 1221 front clamping plates, 1222 rear clamping plates, 1223 locking bolts, 1224 locking nuts, 1225 long strip-shaped through holes, 123-height adjusting assemblies, 1231-threaded connecting sleeves, 1232-adjusting bolts, 124-self-adjusting swinging assemblies, 1241-tension springs, 1242-first swinging arms, 1243-second swinging arms, 1244-connecting arms and 125-detection wheel brackets; 1 a-transmitting probe wheel, 1 b-receiving probe wheel, 100 probe faces, 101 annular concave faces, 102 annular convex faces and 103 gaps.
Detailed Description
The preferred embodiments of the present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, a detection system for a longitudinal tear seam of a mineral conveyor belt comprises an ultrasonic detector 1, an encoder 2 and a data reading processing analysis device 3; as shown in fig. 2 and 3, in the present embodiment, the detection probe of the ultrasonic detector 1 includes a transmission probe 1a and two reception probe 1b, the transmission probe 1a is disposed in the middle of the lower surface of the conveying section of the conveying belt 4, the two reception probe 1b are disposed on the lower surface of the conveying section of the conveying belt 4 and are located at two sides of the transmission probe 1a, and the transmission probe 1a and the two reception probe 1b are located in the width direction of the conveying belt 4, so that the ultrasonic waves emitted by the transmission probe 1a cover the width direction of the conveying belt 4 when the reception probes 1b at two sides receive the ultrasonic waves, thereby improving the transmission efficiency of the ultrasonic waves.
As shown in fig. 3, the present embodiment provides a specific structure of the ultrasonic detector 1, including a main frame 11, three sub-frames 12, one transmitting probe wheel 1a and two receiving probe wheels 1b (the number of sub-frames 12 matches the total number of detecting probe wheels); the main frame 11 comprises two support columns 111, two inclined mounting columns 112 and a horizontal mounting column 113, wherein the two support columns 111 are oppositely arranged, the two inclined mounting columns 112 are oppositely inclined, the upper ends of the two inclined mounting columns 112 are respectively connected with the upper ends of the corresponding support columns 111, the two ends of the horizontal mounting column 113 are respectively connected with the lower ends of the corresponding inclined mounting columns 112, and the horizontal mounting column 113 and the two inclined mounting columns 112 are positioned in the same length direction; the sub-frame 12 for mounting the transmitting probe wheel 1a is mounted on a horizontal mounting column 113, and the sub-frame 12 for mounting the receiving probe wheel 1b is mounted on two inclined mounting columns 112 inclined in opposite directions. In the conveying operation of the conveying belt 4, minerals are mainly placed in the middle of the conveying belt 4, and the pressure of bearing the minerals on the upper surface of the conveying section of the conveying belt 4 is gradually reduced from the middle to two sides, so that the upper surface of the conveying section of the conveying belt 4 is deformed, and an inverted trapezoid structure is formed. Because the vertical tear seam of the conveying belt 4 occurs on the upper surface of the conveying section of the conveying belt 4, when in detection, the detection wheel is required to be contacted with the lower surface of the conveying section of the conveying belt 4, therefore, the main frame 11 for installing the detection wheel adopts a structure with middle horizontal and two inclined sides, and the two support columns 111, the two inclined mounting columns 112 and the horizontal mounting column 113 form a frame structure similar to an M shape, when in installation, the main frame 11 is installed between the conveying section and the return section of the conveying belt 4, and the plane of the whole frame structure is vertical to the conveying direction of the conveying section, so that the shape of the whole main frame 11 is matched with the shape of the conveying section of the conveying belt 4 in the mineral conveying process.
As shown in fig. 3 to 5, the present embodiment also provides a specific structure of the sub-frame 12, where the sub-frame 12 includes a fixing base 121, a clamping assembly 122, a height adjusting assembly 123, a self-adjusting swing assembly 124, and a probe wheel support 125; the clamping assembly 122 comprises a front clamping plate 1221, a rear clamping plate 1222, and a plurality of sets of matched locking bolts 1223 and locking nuts 1224 (four sets are adopted in the embodiment), wherein the front clamping plate 1221 and the rear clamping plate 1222 are respectively provided with a corresponding strip-shaped through hole 1225 for the locking bolts 1223 to pass through, the strip-shaped through holes 1225 are formed along the length direction of the front clamping plate 1221, the front clamping plate 1221 and the rear clamping plate 1222 are respectively positioned on the front side and the rear side of the corresponding horizontal mounting column 113 or the inclined mounting column 112, and are locked by the locking bolts 1223 and the locking nuts 1224, and at least one locking bolt 1223 is respectively locked on the upper side and the lower side of the horizontal mounting column 113 or the inclined mounting column 112; the height adjusting assembly 123 comprises a threaded connecting sleeve 1231 and an adjusting bolt 1232, wherein the threaded connecting sleeve 1231 is fixedly arranged on the front clamping plate 1221, a threaded section of the adjusting bolt 1232 is in threaded connection with the threaded connecting sleeve 1231, the lower end of the adjusting bolt 1232 is in contact fit with the corresponding horizontal mounting column 113 or the inclined mounting column 112, and the length direction of the adjusting bolt 1232 is perpendicular to the length direction of the corresponding horizontal mounting column 113 or the inclined mounting column 112; the fixed seat 121 is fixedly arranged on the front clamping plate 1221, the self-adjusting swing assembly 124 comprises a swing frame and a tension spring 1241, the swing frame comprises a first swing arm 1242, a second swing arm 1243 and a connecting arm 1244, the first swing arm 1242 and the second swing arm are arranged in up-down parallel, the fixed end of the first swing arm 1242 and the fixed end of the second swing arm can be both installed on the fixed seat 121 in a swinging way, and the movable end of the first swing arm 1242 and the movable end of the second swing arm are both hinged with the connecting arm 1244; one end of a tension spring 1241 is connected to the fixed seat 121 and corresponds to the fixed end of the first swing arm 1242, and the other end of the tension spring 1241 is connected to a connecting arm 1244 and corresponds to the movable end of the second swing arm; the probe wheel support 125 is mounted on a connecting arm 1244.
When the split frame body 12 is installed, the front clamping plate 1221 and the rear clamping plate 1222 are respectively positioned on the front side and the rear side of the corresponding horizontal installation column 113 or the inclined installation column 112 according to detection requirements, the fixing seat 121 is fixed on the horizontal installation column 113 or the inclined installation column 112 through locking bolts 1223 and locking nuts 1224, the detection wheel is installed on the corresponding detection wheel support 125, then the adjusting bolts 1232 are rotated to adjust the height, the lower ends of the adjusting bolts 1232 are abutted against the corresponding horizontal installation column 113 or the inclined installation column 112, and the threaded connecting sleeves 1231 correspondingly ascend or descend along the adjusting bolts 1232, so that the detection wheel is in contact fit with the lower surface of the conveying section of the conveying belt 4. In the detection process, the conveying belt 4 drives the detection wheel to rotate, the downward pressure applied to the detection wheel by the conveying belt 4 is self-regulated by the self-regulating swinging assembly 124, and the detection wheel is kept in contact with the lower surface of the conveying section of the conveying belt 4. In the detection process, the conveying belt 4 drives the detection wheel to rotate, and a certain weight of mineral is applied to the downward pressure of the detection wheel through the conveying belt 4, so that the first swing arm 1242 and the second swing arm swing downwards and pull the tension spring 1241 downwards; when the weight of the mineral is lighter, the tension spring 1241 resets under the action of self elasticity to drive the first swing arm 1242 and the second swing arm to swing upwards, so that the detection wheel support 125 is self-adjusted under the action of the swing frame and the tension spring 1241 in the whole mineral transportation process of the conveying belt 4, and the detection wheel is kept in contact with the lower surface of the conveying section of the conveying belt 4.
As shown in fig. 3 and 6, in the present embodiment, the probes in the transmitting probe wheel 1a and the receiving probe wheel 1b each have a convex detection surface 100 (as a corresponding transmitting surface and receiving surface), so that the ultrasonic wave can be focused, thereby improving the transmission energy of the ultrasonic wave and further improving the detection precision; correspondingly, an annular concave surface 101 matched with the detection surface 100 is arranged on the inner side surface of the detection wheel skin along the circumferential direction of the detection wheel skin, an annular convex surface 102 matched with the annular concave surface 101 is arranged on the inner side surface of the detection wheel skin along the circumferential direction of the detection wheel skin, a gap 103 exists between the detection surface 100 and the annular concave surface 101, the width of the gap 103 is 0.4-0.6 mm, the detection surface 100 of the probe is enabled to be as close to the annular concave surface 101 as possible, and friction between the inner side surface of the wheel skin of the detection wheel and the detection surface 100 in the process of rolling of the detection wheel is avoided; in the embodiment, the wheel skin of the detection wheel is made of polyether-ether-ketone, has good acoustic performance and wear resistance, and can be made of other materials with high sound velocity, low attenuation, corrosion resistance, radiation resistance and the like.
As shown in fig. 1 and 7, the working process of the detection system for the longitudinal tear seam of the mineral conveyor belt of the present invention is as follows:
(1) The encoder 2 carries out real-time coding recording on the conveying mileage of the conveying belt 4, and the encoder 2 carries out self-calibration and correction when the conveying mileage of the conveying belt 4 is recorded in real-time coding;
(2) Adjusting the installation condition of the sub-frame body 12 on the main frame body 11, arranging the transmitting probe wheel 1a and the receiving probe wheel 1b for detection on the lower surface of the conveying section of the conveying belt 4 in parallel, so that the transmitting probe wheel 1a and the receiving probe wheel 1b are in contact fit with the lower surface of the conveying section of the conveying belt 4 and are positioned in the width direction of the conveying belt 4; wherein, the transmitting probe wheel 1a is provided with a probe which has the functions of transmitting and receiving at the same time, and the receiving probe wheel 1b is provided with a probe which has the function of receiving only;
(3) Starting a conveying belt 4, wherein the conveying belt 4 drives a transmitting detecting wheel 1a and a receiving detecting wheel 1b to rotate, the lower surface of a conveying section of the conveying belt 4 keeps a certain pressure with the wheel surfaces of all detecting wheels in the transportation operation process, the coupling between the conveying belt 4 and the wheel surfaces of the detecting wheels is ensured, the transmitting detecting wheel 1a and the receiving detecting wheel 1b scan the conveying belt 4, and the scanning process comprises the following steps:
(3-1) the transmitting probe wheel 1a transmits the low-frequency ultrasonic wave with strong penetrating power towards the receiving probe wheel 1b, and the low-frequency ultrasonic wave is received by the receiving probe wheel 1b after being transmitted along the width direction of the conveying belt 4;
(3-2) the transmitting probe wheel 1a transmits the low-frequency ultrasonic wave of the degree towards the conveying belt 4, and the low-frequency ultrasonic wave is received by the transmitting probe wheel 1a after being transmitted in the thickness direction of the conveying belt 4 and reflected at the interface;
In the step (3-1) and the step (3-2), when the transmitting probe wheel 1a transmits and receives the low-frequency ultrasonic waves, and when the receiving probe wheel 1b receives the echo waves, the low-frequency ultrasonic waves are amplified through the pre-amplifier 5 and the power amplification host 6; during processing, the low-frequency ultrasonic wave is firstly processed by the receiving pre-amplifier 5, then the processed receiving signal is simultaneously transmitted to the power amplification host 6 and the ultrasonic host 7, and the power amplification host 6 and the ultrasonic host 7 are processed in a combined way;
(4) The data reading processing analysis device 3 obtains the ultrasonic wave receiving information which has completed the combined processing in the step (3-1) and the step (3-2), obtains the conveying mileage of the conveying belt 4 from the encoder 2, respectively draws the waveform envelope diagrams of the conveying mileage-the highest wave amplitude of the ultrasonic wave, and judges the waveform envelope diagrams according to the different wave amplitudes of the waveform envelope diagrams presented by the transmitting probe wheel 1a and the receiving probe wheel 1 b:
(4-1) when the waveforms of the transmitting probe wheel 1a and the receiving probe wheel 1b are stable and have high amplitude, the transmitting probe wheel 1a and the receiving probe wheel 1b are regarded as passing through the non-joint part of the conveying belt 4, and no longitudinal tear crack exists on the passing conveying belt 4;
(4-2) when the waveform of the transmitting probe wheel 1a is stable and high-amplitude, and the waveform of the receiving probe wheel 1b is low-amplitude, the transmitting probe wheel 1a and the receiving probe wheel 1b are regarded as passing through the non-joint part of the conveying belt 4, and a longitudinal tearing seam exists on the passing conveying belt 4;
(4-3) when the waveforms of the transmitting probe wheel 1a and the receiving probe wheel 1b are low-amplitude, the transmitting probe wheel 1a and the receiving probe wheel 1b are regarded as passing through the joint part of the conveying belt 4.
Because the joint part and the non-joint part of the conveying belt 4 are different in materials and welding process parts, the joint part and the non-joint part of the conveying belt 4 have different acoustic characteristics, the attenuation of ultrasonic waves passing through the joint part is larger than that of the non-joint part under the same ultrasonic detection sensitivity, and the ultrasonic waves can have different receiving conditions and different receiving waveforms when passing through the non-joint part, the joint part and the longitudinal tear seam. Therefore, the transmitting probe wheel 1a transmits the low-frequency ultrasonic wave with strong penetrating power and the low-frequency ultrasonic wave with degree at the same time, the low-frequency ultrasonic wave with strong penetrating power passes through the conveying belt 4 and is received by the receiving probe wheel 1b, the low-frequency ultrasonic wave with degree is received by the transmitting probe wheel 1a after passing through the thickness direction of the conveying belt 4, and whether the transmitting probe wheel 1a and the receiving probe wheel 1b are positioned at the joint part of the conveying belt 4 at the moment is judged according to the difference of waveform envelope diagrams, specifically:
(1) When the transmitting probe wheel 1a and the receiving probe wheel 1b pass through the non-joint part and the conveying belt 4 is normal, as shown in fig. 8 and 9, the transmitting probe wheel 1a and the receiving probe wheel 1b can normally receive ultrasonic waves; at this time, as shown in fig. 10 and 11, the waveform envelope diagrams of the "transmission mileage-ultrasonic highest amplitude" of the transmitting probe wheel 1a and the receiving probe wheel 1b are both stable and high-amplitude;
(2) When the transmitting probe wheel 1a and the receiving probe wheel 1b pass through the non-joint part but the conveying belt 4 has a longitudinal tear crack, as shown in fig. 12, the transmitting probe wheel 1a can normally receive ultrasonic waves, and the waveform envelope diagram of the transmission mileage-ultrasonic highest amplitude of the transmitting probe wheel 1a is stable and high-amplitude, as shown in fig. 13; the receiving probe wheel 1b receives the low-frequency ultrasonic wave with strong penetrating power sent by the transmitting probe wheel 1a through the conveying belt 4 by the receiving probe wheel 1b, and as the longitudinal tearing seam exists at the corresponding position on the conveying belt 4 at this time, the longitudinal tearing seam blocks the ultrasonic wave sent by the transmitting probe wheel 1a to the receiving probe wheel 1b, so as to be shown in fig. 14, the receiving probe wheel 1b cannot receive the ultrasonic wave at this time, and the waveform envelope diagram of the 'conveying mileage-ultrasonic wave highest amplitude' of the receiving probe wheel 1b has a low amplitude;
(3) When the transmitting probe wheel 1a and the receiving probe wheel 1b pass through the joint portion, as shown in fig. 15, the attenuation of the ultrasonic wave at the joint portion is larger than that at the non-joint portion under the same ultrasonic detection sensitivity, and therefore, the transmitting probe wheel 1a and the receiving probe wheel 1b cannot receive the ultrasonic wave, and as shown in fig. 16 and 17, the waveform envelope diagrams of the "transmission mileage-ultrasonic highest amplitude" of the transmitting probe wheel 1a and the receiving probe wheel 1b are lower than that at normal.
While the encoder 2 performs self-calibration and correction, it includes the following steps:
(a) Recording the positions of the transmitting probe wheel 1a and the receiving probe wheel 1b when passing through each joint part;
(b) Recording the pulse number of the encoder 2 when the transmitting probe wheel 1a and the receiving probe wheel 1b pass through the joint parts twice;
(c) Dividing the joint spacing by the number of pulses to obtain the distance represented by each pulse of the encoder 2;
(d) The pulse number of the encoder 2 is collected and measured, and when the pulse number is missing to reach a specified proportion, the transmitting probe wheel 1a and the receiving probe wheel 1b pass through the next joint part, the position information of the recorded conveying mileage is automatically rounded according to a multiple of the joint distance.
In general, the distance between two adjacent joint portions (i.e., joint pitch) of the conveyor belt 4 is constant (typically 200 m), and as shown in fig. 18, the transmitting probe wheel 1a and the receiving probe wheel 1B reach the joint portion B from the joint portion a, and the number of pulses of the encoder 2 is basically constant through the conveying mileage within one joint pitch, so that the distance represented by each pulse of the encoder 2 can be obtained by the joint pitch and the number of pulses. On the basis, the pulse number of the encoder 2 is collected and measured, when the conveying belt 4 is uneven or idle running is caused by suspension of vibration of the encoding wheel, the pulse number of the encoder 2 is lost, when the pulse number is lost to reach a specified proportion (such as 10%), the position information of the recorded conveying mileage is automatically rounded according to a multiple of the joint spacing when the transmitting probe wheel 1a and the receiving probe wheel 1b pass through the next joint position, and self-calibration and correction are automatically completed.
In addition, it should be noted that, in the specific embodiments described in the present specification, names of various parts and the like may be different, and all equivalent or simple changes of the structures, features and principles described in the conception of the present invention are included in the protection scope of the present invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions in a similar manner without departing from the scope of the invention as defined in the accompanying claims.
Claims (8)
1. A detection system for a mineral conveyor belt longitudinal tear seam, comprising:
The ultrasonic detector is arranged on the lower surface of the conveying section of the conveying belt and comprises at least two detection wheels, each detection wheel comprises at least one emission detection wheel and at least one receiving detection wheel, each detection wheel is contacted with the lower surface of the conveying section of the conveying belt, the transmission range of ultrasonic waves emitted by the emission detection wheel covers the width direction of the conveying section of the conveying belt, and the conveying belt keeps downward pressure on the wheel surface of each detection wheel during detection; the transmitting probe wheel transmits ultrasonic waves, and the receiving probe wheel continuously acquires echoes in at least one conveying length period of the conveying belt;
The encoder is used for carrying out real-time coding recording on the conveying mileage of the conveying belt and carrying out self-calibration and correction when the conveying mileage of the conveying belt is recorded in a real-time coding manner;
The data reading, processing and analyzing equipment is used for acquiring the receiving condition of each receiving detection wheel and the mileage record of the encoder, drawing a waveform envelope diagram of 'the highest wave amplitude of the conveying mileage-ultrasonic waves' so as to present the transmission condition of the ultrasonic waves on the conveying belt, and judging whether the conveying belt has a longitudinal tear crack according to the shape of the waveform envelope diagram.
2. The detection system for a mineral conveyor belt longitudinal tear seam of claim 1, wherein: the transmitting probe wheel is internally provided with a probe with transmitting and receiving functions, and the receiving probe wheel is internally provided with a probe with receiving functions; when the detection is carried out, the transmitting probe wheel transmits low-frequency ultrasonic waves with strong penetrating power to the receiving probe wheel, and the low-frequency ultrasonic waves are received by the receiving probe wheel after being transmitted along the width direction of the conveying belt; meanwhile, the transmitting probe wheel transmits low-frequency ultrasonic waves of 0 degrees towards the conveying belt, and the low-frequency ultrasonic waves are transmitted in the thickness direction of the conveying belt and then reflected at the interface to be received by the transmitting probe wheel.
3. The detection system for a mineral conveyor belt longitudinal tear seam of claim 2, wherein: the data reading processing analysis equipment carries out the following judgment according to the drawn waveform envelope diagrams of the transmission mileage-ultrasonic highest amplitude of the transmission probe wheel and the receiving probe wheel:
(1) When the oscillograms of the transmitting probe wheel and the receiving probe wheel are stable and have high amplitude, the transmitting probe wheel and the receiving probe wheel are regarded as the transmitting probe wheel and the receiving probe wheel to pass through the non-joint part of the conveying belt, and no longitudinal tearing crack exists on the passing conveying belt;
(2) When the waveform diagram of the transmitting probe wheel is stable and high-amplitude, and the waveform diagram of the receiving probe wheel is low-amplitude, the transmitting probe wheel and the receiving probe wheel are regarded as passing through the non-joint part of the conveying belt, and a longitudinal tearing seam exists on the passing conveying belt;
(3) When the oscillograms of the transmitting probe wheel and the receiving probe wheel are low in amplitude, the transmitting probe wheel and the receiving probe wheel are regarded as passing through the joint part of the conveying belt.
4. A detection system for a mineral conveyor belt longitudinal tear seam according to any of claims 1 to 3, characterized in that: the encoder comprises the following steps when performing self-calibration and correction:
(a) Recording the positions of the transmitting probe wheel and the receiving probe wheel when passing through the joint part each time;
(b) Recording the pulse number of the encoder when the transmitting detecting wheel and the receiving detecting wheel pass through the adjacent joint parts twice;
(c) Dividing the joint spacing by the number of pulses to obtain a distance represented by each pulse of the encoder;
(d) And (3) collecting and metering the pulse number of the encoder, and when the pulse number is in a specified proportion, transmitting the probe wheel and receiving the probe wheel to pass through the next joint part, recording the position information of the conveying mileage and automatically rounding according to a multiple of the joint spacing.
5. A detection system for a mineral conveyor belt longitudinal tear seam according to any of claims 1 to 3, characterized in that: and when the detection probe wheel transmits or receives ultrasonic waves, the power of the ultrasonic waves is amplified.
6. A detection system for a mineral conveyor belt longitudinal tear seam according to any of claims 1 to 3, characterized in that: the ultrasonic detector comprises a main frame body and at least two sub-frame bodies which can adjust the distance between the lower surface of a conveying section of the conveying belt and the detection wheel, wherein the sub-frame bodies are fixedly arranged on the main frame body, each main frame body comprises a supporting part, a horizontal installation part and two inclined installation parts, the horizontal installation parts are arranged on the supporting parts, the horizontal installation parts are arranged between the two inclined installation parts, and the two inclined installation parts incline upwards from the middle to two sides; the sub-frame body is arranged on the horizontal installation part or the inclined installation part, and each detection wheel is respectively arranged on the corresponding sub-frame body.
7. The detection system for a mineral conveyor belt longitudinal tear seam of claim 6, wherein: the sub-frame body comprises a fixed seat, a clamping assembly, a height adjusting assembly, a self-adjusting swinging assembly and a detection wheel bracket; the fixed seat is fixed on the horizontal installation part or the inclined installation part through the clamping component, the height adjusting component is movably matched with the corresponding horizontal installation part or the inclined installation part, and the adjusting end of the height adjusting component is connected with the fixed seat; the fixed end of the self-adjusting swinging component is arranged on the fixed seat, and the detection wheel bracket is arranged on the movable end of the self-adjusting swinging component.
8. A detection system for a mineral conveyor belt longitudinal tear seam according to any of claims 1 to 3, characterized in that: the probe in the detection wheel is provided with a convex detection surface, an annular concave surface matched with the detection surface is arranged on the inner side surface of the wheel skin of the detection wheel along the circumferential direction of the detection surface, a gap exists between the detection surface and the annular concave surface, and an annular convex surface matched with the annular concave surface is arranged on the outer side surface of the wheel skin of the detection wheel; the wheel skin of the detection wheel is hard skin.
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| CN202410501903.1A CN118062520B (en) | 2024-04-25 | 2024-04-25 | Detection system for longitudinal tear crack of mineral conveyor belt |
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| CN202410501903.1A CN118062520B (en) | 2024-04-25 | 2024-04-25 | Detection system for longitudinal tear crack of mineral conveyor belt |
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|---|---|---|---|---|
| KR20010081358A (en) * | 2000-02-14 | 2001-08-29 | 전정욱 | detector of conveyor belt rip |
| WO2018032040A1 (en) * | 2016-08-18 | 2018-02-22 | Technological Resources Pty. Limited | A belt rip detection system |
| CN114674929A (en) * | 2022-05-27 | 2022-06-28 | 南京富岛数字化检测技术有限公司 | Small-angle flaw detection device and method based on double-probe-wheel structure |
| CN114751138A (en) * | 2022-03-09 | 2022-07-15 | 国家能源集团国源电力有限公司 | Belt longitudinal tearing monitoring system and conveying equipment |
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2024
- 2024-04-25 CN CN202410501903.1A patent/CN118062520B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010081358A (en) * | 2000-02-14 | 2001-08-29 | 전정욱 | detector of conveyor belt rip |
| WO2018032040A1 (en) * | 2016-08-18 | 2018-02-22 | Technological Resources Pty. Limited | A belt rip detection system |
| CN114751138A (en) * | 2022-03-09 | 2022-07-15 | 国家能源集团国源电力有限公司 | Belt longitudinal tearing monitoring system and conveying equipment |
| CN114674929A (en) * | 2022-05-27 | 2022-06-28 | 南京富岛数字化检测技术有限公司 | Small-angle flaw detection device and method based on double-probe-wheel structure |
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