Steel wire rope core conveying belt joint positioning marking system and positioning marking method

Abstract

The invention relates to the technical field of conveying belt detection, in particular to a steel wire rope core conveying belt connector positioning and marking system and a positioning and marking method. The speed detection unit is used for detecting the running speed of the conveying belt; the electromagnetic detection array is used for detecting the magnetic flux leakage amount of the conveying belt; the paint spraying system is used for spraying paint on the conveying belt according to the joint lap joint type and length of the conveying belt; and the system control unit receives the running speed and the magnetic flux leakage amount of the conveying belt, obtains the position and the type of the joint according to the magnetic flux leakage amount, and then controls the paint spraying system to run according to the running speed of the conveying belt and the position and the type of the joint. Meanwhile, the invention further discloses a positioning and marking method of the positioning and marking system. Based on the size of the leakage magnetic field, the lap joint type and the joint length of the steel wire rope core conveying belt joint are judged according to the relation between the lap joint mode of the conveying belt joint and the leakage magnetic field, the method is simple and reliable, and the recognition rate is high.

Description

Technical Field

[0001] The invention relates to the technical field of conveyor belt detection, and in particular to a steel cord conveyor belt joint positioning marking system and a positioning marking method. Background Art

[0002] During the daily maintenance and use of steel cord conveyor belts, equipment personnel often need to regularly check the quality of the belt joints. However, after the vulcanization treatment, there are no obvious marks and features on the outer surface of the steel cord conveyor belt joints, which requires a lot of time and energy to conduct overall inspections during maintenance, greatly affecting the maintenance efficiency. Designing a system that can locate and mark the joints of steel cord conveyor belts can greatly reduce the time required to find the conveyor belt joints and improve the maintenance efficiency. Summary of the invention

[0003] In order to solve the defects in the prior art, the present invention provides a wire rope core conveyor belt joint positioning marking system and positioning marking method, which are specifically implemented by the following technical solutions: A wire rope core conveyor belt joint positioning marking system, comprising a conveyor belt; A speed detection unit, used to detect the running speed of the conveyor belt; Electromagnetic detection array, used to detect the magnetic flux leakage of the conveyor belt; A paint spraying system is used to spray paint on the conveyor belt according to the type and length of the joint overlap of the conveyor belt; The system control unit is used to receive the running speed and magnetic leakage of the conveyor belt, obtain the position and type of the joint according to the magnetic leakage, and then control the operation of the painting system according to the running speed of the conveyor belt, the position and type of the joint.

[0004] The speed detection unit comprises a photoelectric encoder mounted on the first fixing device, the photoelectric encoder is electrically connected to the system control unit, and a roller is mounted on the input end, and the roller is in rolling cooperation with the conveyor belt.

[0005] The paint spraying system includes a second fixing device, on which a plurality of paint spray guns are installed in a linear array along the width direction of the conveyor belt. The paint spray guns are electrically connected to the system control unit, and the nozzles of the paint spray guns face the outer surface of the conveyor belt.

[0006] The electromagnetic detection array includes a plurality of electromagnetic detection units, which are installed in a linear array along the width direction of the conveyor belt and are located between two layers of the conveyor belt. The electromagnetic detection units are electrically connected to the system control unit.

[0007] The system control unit includes a microprocessor module, which is electrically connected to a speed detection unit interface, an electromagnetic detection array interface, and a paint spraying system interface, respectively. The speed detection unit interface is electrically connected to a photoelectric encoder, the electromagnetic detection array interface is electrically connected to an electromagnetic detection unit, and the paint spraying system interface is electrically connected to a paint spray gun.

[0008] The microprocessor module is also electrically connected to the human-machine interaction unit interface, and the human-machine interaction unit interface is electrically connected to the human-machine interaction unit.

[0009] A positioning marking method based on a steel cord conveyor belt joint positioning marking system comprises the following steps: Step S1, initializing the conveyor belt joint, maximum length , electromagnetic signal sampling period ; Step S2: Detect the running speed of the conveyor belt using the speed detection unit ; Step S3, calculating the discrete value corresponding to the maximum joint length ; Step S4: the system control unit reads the discrete value output by the electromagnetic detection array. , i corresponds to the i-th electromagnetic detection array, and n corresponds to the electromagnetic signal time sampling point; Step S5: Gaussian filtering is performed to obtain a smoothed signal ; Step S6, find signal The coordinate value corresponding to the extreme point of , i is a positive integer, arranged from small to large, forming a set , characterized by the position of each channel joint; Step S7, calculate the set The difference between the element in the set and the first element in the set, and the first element and the difference less than P The elements of the new set are arranged in ascending order. , j is a positive integer, P The number of pulses that the photoelectric encoder should output corresponding to the joint overlap length, and then Delete these elements, increase the value of i by 1, and repeat step S7 until the set If the element in is empty, the algorithm ends; Step S8, according to the set The number of elements and the values ​​of the elements are used to determine the lap type and length of the joint of the steel cord conveyor belt; Step S9, calculate the time it takes for the conveyor belt joint to move to the paint spraying system ,in, is the maximum length of the conveyor belt joint, is the running speed of the conveyor belt, The distance from the paint spraying system to the conveyor belt speed detection unit; Step S10, when the conveyor belt joint moves to the paint spraying system, the paint spraying system is started to spray a corresponding spraying pattern of the joint overlap type and joint length on the conveyor belt (2).

[0010] The step S2 specifically includes the following steps: Step S21, the system control unit 3 reads the pulse signal output by the photoelectric encoder; Step S22, record the number of pulses output by the photoelectric encoder within 100ms ; Step S23: Calculate the conveyor belt speed ,in, is the radius of the roller of the photoelectric encoder 42, is the resolution of the photoelectric encoder.

[0011] The step S5 specifically comprises the following steps: Step S51, calculate when When the Gaussian signal The sampled values ​​are saved as a sequence ,in ; Step S52: Calculation = ;in, is the nth discrete value output by the i-th electromagnetic detection array.

[0012] The specific lap type of the steel cord conveyor belt joint determined in step S8 is: When the number of elements in is X times of 2, it is judged as an X-order overlap; the length of the joint is the set The difference between the largest and smallest elements in .

[0013] The technical solution of the present invention has the following advantages: The present invention uses an electromagnetic detection unit array to detect the size of the leakage magnetic field perpendicular to the conveyor belt direction, and judges the overlap type and joint length of the steel wire core conveyor belt joint according to the relationship between the overlap mode of the conveyor belt joint and the leakage magnetic field. The method is simple and reliable, and the recognition rate is high. The electromagnetic detection unit array used in the present invention is composed of a plurality of independent electromagnetic detection units, and is arranged perpendicular to the direction of movement of the conveyor belt. Each detection unit is responsible for detecting the state of 4-8 steel wire cores, and each detection unit can work independently, which greatly improves the system reliability and detection accuracy. The present invention uses Gaussian filtering to smooth the output signal of the electromagnetic detection unit, which can not only effectively filter out the Gaussian white noise in the signal, but also better retain the edge effect of the signal and improve the detection accuracy. At the same time, the present invention uses a graphical method to identify the overlap type and length of the joint, which is convenient and intuitive. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 Structure diagram of the joint positioning marking system for steel cord conveyor belts; Figure 2 To locate the system controller schematic diagram of the marking system; Figure 3 It is a schematic diagram of first-order overlap; Figure 4 It is a schematic diagram of second-order overlap; Figure 5 It is a schematic diagram of the third-order overlap; Figure 6 This is a schematic diagram of the fourth-order overlap.

[0016] In the figure, 1-driving device, 2-conveyor belt, 3-system control unit, 31-microprocessor module, 32-speed detection unit interface, 33-electromagnetic detection array interface, 34-painting system interface, 35-human-computer interaction unit interface, 4-speed detection unit, 41-first fixing device, 42-photoelectric encoder, 5-electromagnetic detection array, 51-electromagnetic detection unit, 6-painting system, 61-second fixing device, 62-paint spray gun, 7-human-computer interaction unit. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the modules or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0021] As attached Figure 1 As shown, the present invention provides a wire rope core conveyor belt joint positioning marking system, which includes a system control unit 3, a speed detection unit 4, an electromagnetic detection array 5, a paint spraying system 6 and a human-computer interaction unit 7, which are used to detect the joint position and joint type of the conveyor belt 2, and to spray paint and mark the joint position according to the detected joint type.

[0022] The conveyor belt 2 is driven by a driving device 1, which includes at least one guide roller and an active roller driven by a motor. One end of the conveyor belt 2 is sleeved on the guide roller, and the other end is sleeved on the active roller. The motor drives the active roller to rotate, thereby driving the conveyor belt 2 to rotate, thereby realizing the operation of the conveyor belt 2.

[0023] The speed detection unit 4 is used to detect the running speed of the conveyor belt 2. Specifically, in this embodiment, the speed detection unit 4 includes a first fixing device 41 and a photoelectric encoder 42, wherein the first fixing device 41 is used to fix the photoelectric encoder 42 and keep the state of the photoelectric encoder 42 stable; the photoelectric encoder 42 is fixedly installed on the first fixing device 41, and a roller is installed at the input end, and the roller is in rolling cooperation with the conveyor belt 2, so that when the conveyor belt 2 is running, the roller rotates accordingly, so as to realize the measurement of the running speed of the conveyor belt 2.

[0024] Since the conveyor belt 2 is sleeved on the guide roller and the driving roller, that is, the conveyor belt 2 is in an oblong ring shape, the conveyor belt 2 forms an upper belt and a lower belt. The first fixing device 41 can be installed between the upper belt and the lower belt. Figure 1 As shown, the roller preferably rolls with the bottom of the upper belt, but can also roll with the top of the lower belt.

[0025] The first fixing device 41 can also be installed below the conveyor belt 2. In this case, the rollers are in rolling cooperation with the bottom of the lower belt.

[0026] Of course, the speed detection unit 4 can also use laser speed measurement and other methods to measure the running speed of the conveyor belt 2. In this embodiment, a photoelectric encoder 42 is used, which is simple and reliable in structure, high in precision, and lower in cost compared to other methods.

[0027] The paint spraying system 6 includes a second fixing device 61 and a paint spraying gun 62. Figure 1 As shown, the paint spray gun 62 is fixed on the second fixing device 61, which is located above the conveyor belt 2. The detected joint overlap type and length can be sprayed on the conveyor belt 2 to play the role of marking the joint position and overlap type. The second fixing device 61 can be a gantry, which spans above the conveyor belt 2. There are several paint spray guns 62, which are installed at the bottom of the crossbeam of the gantry in a linear array along the width direction of the conveyor belt 2. The nozzle of the paint spray gun 62 faces the conveyor belt 2. The detected joint overlap type and length can be sprayed on the conveyor belt 2 to play the role of marking the joint position and overlap type.

[0028] Of course, the entire gantry can be turned upside down so that the paint spray gun 62 is located below the conveyor belt 2, that is, below the lower belt. That is, it is necessary to ensure that the nozzle of the paint spray gun 62 is always facing the outer surface of the conveyor belt 2 so that the spray pattern sprayed can be found intuitively.

[0029] The electromagnetic detection array 5 includes a plurality of electromagnetic detection units 51, which are installed in a linear array along the width direction of the conveyor belt 2 and are located below the conveyor belt 2, that is, they are installed between the upper belt and the lower belt of the conveyor belt 2 through corresponding mounting seats and maintain a certain safety distance from the conveyor belt 2. The electromagnetic detection unit 51 can detect the magnetic leakage of the steel cord conveyor belt 2, such as by using a magnetic leakage sensor.

[0030] The system control unit 3 includes a microprocessor module 31, a speed detection unit interface 32, an electromagnetic detection array interface 33, a paint spraying system interface 34 and a human-machine interaction unit interface 35, which realize the control of the positioning marking system. The system control unit 3 can judge the overlap type and length of the steel cord conveyor belt joint according to the leakage magnetic characteristics received by the electromagnetic detection array interface 33. Figure 3 As shown, the microprocessor module 31 is electrically connected to the A / D converter and can realize bidirectional communication. The A / D converter is electrically connected to the electromagnetic detection array interface 33 , and the electromagnetic detection array interface 33 is electrically connected to the corresponding electromagnetic detection unit 51 .

[0031] The microprocessor module 31 is connected to the relay unit and can realize two-way communication. The relay unit is electrically connected to the paint spraying system 6 to control the opening and closing of each paint spraying gun 62 and obtain the opening and closing status of the paint spraying gun 62.

[0032] The microprocessor module 31 is also electrically connected to the photoelectric isolator, which is electrically connected to the speed detection unit interface 32. The speed detection unit interface 32 is electrically connected to the photoelectric encoder 42, and the system control unit 3 can calculate the running speed and distance of the conveyor belt by recording the number of pulses output by the photoelectric encoder 42.

[0033] The microprocessor module 31 is also electrically connected to the RS485 interface and can realize two-way communication; the RS485 interface is electrically connected to the human-machine interaction unit interface 35, and the human-machine interaction unit interface 35 is electrically connected to the human-machine interaction unit 7. The human-machine interaction unit 7 is used to view and set operation data.

[0034] The positioning marking method based on the above-mentioned steel cord conveyor belt joint positioning marking system is as follows: Step S1: Initialize conveyor belt joint, maximum length , electromagnetic signal sampling period ; Step S2: Detect the running speed of the conveyor belt 2 using the speed detection unit 4 ; Step S3: Calculate the discrete value corresponding to the maximum joint length ; Step S4: Read the discrete value output by the electromagnetic detection unit 51 through the electromagnetic detection array interface 33 , i corresponds to the i-th electromagnetic detection array, and n corresponds to the electromagnetic signal time sampling point; Step S5: Gaussian filtering is performed to obtain a smoothed signal ; Step S6: Find the signal The coordinate value corresponding to the extreme point of , arranged from small to large, forming a set ; It is characterized by the position of each channel joint; Step S7: Calculate the set in sequence The difference between the element in the set and the first element in the set, and the first element and the difference less than P The elements of the new set are arranged in ascending order. , j is a positive integer, P The number of pulses that the photoelectric encoder should output corresponding to the joint overlap length, and then Delete these elements, increase the value of i by 1, and repeat step S7 until the set If the element in is empty, the algorithm ends; Step S8: According to the set The number of elements in (signal The number of extreme points) and values ​​are used to determine the overlap type and joint length of the steel cord conveyor belt joint according to Table 3; Table 3 Relationship between the type and length of the steel cord conveyor belt joint and the output signal of the electromagnetic detection unit

[0035] From the above table, we can see that the set When the number of elements in is greater than 2 (X-1) and less than or equal to 2X, it is considered as an X-order overlap, where X is a positive integer; the length of the joint is the set The maximum value of X in this embodiment is 4.

[0036] Step S9: Calculate the time it takes for the conveyor belt joint to move to the paint spraying system 6 ,in, is the maximum length of the conveyor belt joint, is the running speed of the conveyor belt, is the distance from the paint spraying system 6 to the conveyor belt speed detection unit 4; Step S10: When the conveyor belt joint moves to the paint spraying system 6, start the paint spraying system 6 to spray the lap type and joint length of the joint on the wire rope core conveyor belt 2. The spraying pattern is shown in Table 4. The starting position of the pattern is consistent with the starting position of the joint, and the length is equal to the joint length.

[0037] Table 4 Spray pattern of steel cord conveyor belt

[0038] The aforementioned step S2 specifically includes the following steps: Step S21: reading the pulse signal output by the photoelectric encoder 42 through the speed detection unit interface 32; Step S22: Record the number of pulses output by the photoelectric encoder 42 within 100ms ; Step S23: Calculate the conveyor belt speed ,in, is the radius of the roller of the photoelectric encoder 42, is the resolution of the photoelectric encoder.

[0039] The aforementioned step S5 specifically includes the following steps: Step S51, calculate when When the Gaussian signal The sampled values ​​are saved as a sequence ,in ; Step S52: Calculation = , It is the nth discrete value output by the i-th electromagnetic detection array 5 .

[0040] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention.

Claims

1. A wire rope core conveyor belt joint positioning marking system, characterized in that: comprising a conveyor belt (2); A speed detection unit (4), used to detect the running speed of the conveyor belt (2); An electromagnetic detection array (5) is used to detect the magnetic flux leakage of the conveyor belt (2); A paint spraying system (6) for spraying paint on the conveyor belt (2) according to the joint overlap type and length of the conveyor belt (2); The system control unit (3) is used to receive the running speed and magnetic flux leakage of the conveyor belt (2), obtain the position and type of the joint according to the magnetic flux leakage, and then control the operation of the painting system (6) according to the running speed of the conveyor belt (2) and the position and type of the joint.

2. The steel cord conveyor belt joint positioning marking system according to claim 1, characterized in that: The speed detection unit (4) comprises a photoelectric encoder (42) mounted on the first fixing device (41), the photoelectric encoder (42) being electrically connected to the system control unit (3), and having a roller mounted on the input end, the roller being in rolling cooperation with the conveyor belt (2).

3. The steel cord conveyor belt joint positioning marking system according to claim 2, characterized in that: The paint spraying system (6) comprises a second fixing device (61), on which a plurality of paint spraying guns (62) are installed in a linear array along the width direction of the conveyor belt (2), the paint spraying guns (62) being electrically connected to the system control unit (3), and the spraying nozzles of the paint spraying guns (62) are directed toward the outer surface of the conveyor belt (2).

4. The steel cord conveyor belt joint positioning marking system according to claim 3, characterized in that: The electromagnetic detection array (5) comprises a plurality of electromagnetic detection units (51), the plurality of electromagnetic detection units (51) being installed in a linear array along the width direction of the conveyor belt (2) and being located between two layers of belts of the conveyor belt (2), the electromagnetic detection units (51) being electrically connected to a system control unit (3).

5. The steel cord conveyor belt joint positioning marking system according to claim 4, characterized in that: The system control unit (3) comprises a microprocessor module (31), wherein the microprocessor module (31) is electrically connected to a speed detection unit interface (32), an electromagnetic detection array interface (33), and a paint spraying system interface (34), respectively; the speed detection unit interface (32) is electrically connected to a photoelectric encoder (42); the electromagnetic detection array interface (33) is electrically connected to an electromagnetic detection unit (51); and the paint spraying system interface (34) is electrically connected to a paint spraying gun (62).

6. The steel cord conveyor belt joint positioning marking system according to claim 5, characterized in that: The microprocessor module (31) is also electrically connected to a human-machine interaction unit interface (35), and the human-machine interaction unit interface (35) is electrically connected to a human-machine interaction unit (7).

7. A positioning marking method for a steel cord conveyor belt joint positioning marking system according to claim 2, characterized in that: The following steps are involved: Step S1, initializing the conveyor belt joint, maximum length , electromagnetic signal sampling period ; Step S2, using the speed detection unit (4) to detect the running speed of the conveyor belt (2) ; Step S3, calculating the discrete value corresponding to the maximum joint length ; Step S4, the system control unit (3) reads the discrete value output by the electromagnetic detection array (5) , i corresponds to the i-th electromagnetic detection array, and n corresponds to the electromagnetic signal time sampling point; Step S5: Gaussian filtering is performed to obtain a smoothed signal ; Step S6, find signal The coordinate value corresponding to the extreme point of , i is a positive integer, arranged from small to large, forming a set , characterized by the position of each channel joint; Step S7, calculate the set The difference between the element in the set and the first element in the set, and the first element and the difference less than P The elements of the new set are arranged in ascending order. , j is a positive integer, P The number of pulses that the photoelectric encoder should output corresponding to the joint overlap length, and then Delete these elements, increase the value of i by 1, and repeat step S7 until the set If the element in is empty, the algorithm ends; Step S8, according to the set The number of elements and the values ​​of the elements are used to determine the lap type and length of the joint of the steel cord conveyor belt; Step S9, calculating the time it takes for the conveyor belt joint to move to the paint spraying system (6) ,in, is the maximum length of the conveyor belt joint, is the running speed of the conveyor belt, is the distance from the paint spraying system (6) to the conveyor belt speed detection unit (4); Step S10, when the conveyor belt joint moves to the paint spraying system (6), the paint spraying system (6) is started to spray a corresponding spraying pattern of the joint overlap type and joint length on the conveyor belt (2).

8. The method for positioning and marking a joint of a steel cord conveyor belt according to claim 7, characterized in that: The step S2 specifically includes the following steps: Step S21, the system control unit (3) reads the pulse signal output by the photoelectric encoder (42); Step S22, recording the number of pulses output by the photoelectric encoder (42) within 100ms ; Step S23: Calculate the conveyor belt speed ,in, is the radius of the roller of the photoelectric encoder 42, is the resolution of the photoelectric encoder.

9. The method for positioning and marking a joint of a steel cord conveyor belt according to claim 7, characterized in that: The step S5 specifically comprises the following steps: Step S51, calculate when When the Gaussian signal The sampled values ​​are saved as a sequence ,in ; Step S52: Calculation = , is the nth discrete value output by the i-th electromagnetic detection array (5).

10. The method for positioning and marking a joint of a steel cord conveyor belt according to claim 7, characterized in that: The specific lap type of the steel cord conveyor belt joint determined in step S8 is: When the number of elements in is greater than 2 (X-1) and less than or equal to 2X, it is considered as an X-order overlap, where X is a positive integer; the length of the joint is the set The difference between the largest and smallest elements in .

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