Metal foreign matter positioning and marking system and metal foreign matter positioning and marking method for sealing-tape machine

Abstract

The invention discloses a sealing-tape machine metal foreign matter positioning and marking system and a sealing-tape machine metal foreign matter positioning and marking method, and relates to the technical field of foreign matter detection.The sealing-tape machine metal foreign matter positioning and marking system comprises a metal detector, a positioning system controller, a position detecting device and a position indicating device; the position detection device comprises a fixing device, a steering engine and an elastic connecting rod, one end of the elastic connecting rod is hinged to the fixing device, the steering engine is located on the side, away from the fixing device, of the elastic connecting rod, and a distance measuring roller is rotationally installed at the other end of the elastic connecting rod. An acceleration sensor is further installed on the side, away from the photoelectric encoder, of the elastic connecting rod. Therefore, under normal work, the position detection device keeps a certain safe distance from the adhesive tape and does not make contact with the adhesive tape, and the service life of the position detection device is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of foreign body detection, and in particular to a metal foreign body positioning marking system and a metal foreign body positioning marking method for a belt conveyor. Background Art

[0002] The tape conveyor is a universal material conveying tool. Various impurities, especially metal foreign matter, should be avoided as much as possible in the materials conveyed by the tape conveyor. Because metal foreign matter can not only damage the equipment, but also scratch the tape, or even tear the tape, thus affecting production, metal detectors are generally installed on the tape conveyor.

[0003] However, after completing the detection, traditional metal detectors cannot locate the location of metal foreign bodies, or can only give an approximate range, with an error of up to 3-5 meters. It is time-consuming and laborious to find small metal foreign bodies in such a large area, and the efficiency is low. In some sites, there have even been cases where foreign bodies were not found after the metal foreign body alarm, and production accidents occurred after the tape machine was restarted. Therefore, how to use the positioning device in conjunction with the metal detector to accurately locate the location of the metal foreign body is the main problem currently faced. Summary of the invention

[0004] In view of the above defects, the purpose of the present invention is to provide a metal foreign body positioning marking system and a metal foreign body positioning marking method for a tape conveyor, aiming to solve the problem that it is difficult for existing tape conveyors to accurately locate the position of metal foreign bodies.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: The invention discloses a metal foreign body positioning and marking system for a tape conveyor, comprising a metal detector, a positioning system controller, a position detection device and a position indicating device, wherein the metal detector, the positioning system controller, the position detection device and the position indicating device are all electrically connected, the tape is located between the metal detector and the position detection device, the position detection device comprises a fixing device, a steering gear and an elastic connecting rod, one end of the elastic connecting rod is hinged to the fixing device, the steering gear is located on a side of the elastic connecting rod away from the fixing device, a distance measuring roller is rotatably installed on the other end of the elastic connecting rod, a photoelectric encoder is arranged between the distance measuring roller and the elastic connecting rod, and an acceleration sensor is also installed on a side of the elastic connecting rod away from the photoelectric encoder.

[0006] The positioning system controller includes a single chip microcomputer, a metal detection interface, a position detection interface and a position indication interface, and the metal detection interface, the position detection interface and the position indication interface are all electrically connected to the single chip microcomputer.

[0007] Wherein, the metal detector is electrically connected to the metal detection interface, the position detection device is electrically connected to the position detection interface, and the position indication device is electrically connected to the position indication interface.

[0008] The photoelectric encoder is installed in the central area of ​​the distance measuring roller, and the output end of the photoelectric encoder is electrically connected to the position detection interface.

[0009] Wherein, the position indicating device comprises a display screen, and the display screen is electrically connected to the position indicating interface.

[0010] A method for positioning and marking metal foreign bodies in a tape conveyor comprises the following steps: Step 1: Under normal circumstances, the metal detector starts the position detection signal and the foreign body shape indicator output are both 0. When the metal detector detects a metal foreign body, the start position detection signal is set to 1, and the type of metal foreign body is output by setting the corresponding metal foreign body indicator position to 1; Step 2: When the start position detection signal changes from 1 to 0, on the one hand, a stop signal is sent to the belt conveyor controller, and on the other hand, the position detection device is started to measure the displacement of the belt; Step 3: After receiving the start signal, the position detection device starts the servo to make the distance measuring roller close to the tape; Step 4: When the distance measuring roller is close to the tape, on the one hand, start the acceleration sensor and calculate the normalized mean square error of the acceleration sensor , is the maximum value of the acceleration sensor output, The smaller the value, the closer the contact between the distance measuring roller and the tape of the detection system is, and the more accurate the measurement accuracy is. When the value is greater than a certain threshold, it indicates that the position detection device is in poor contact with the tape, and an alarm is issued; on the other hand, the photoelectric encoder rigidly connected to the distance measuring roller outputs a distance measuring pulse; Step 5: Calculate the distance between the end of the metal foreign body and the metal detector ,in is the number of ranging pulses, is the radius of the distance measuring roller, is the resolution of the photoelectric encoder, is the speed of the tape, The start time of the position detection device; Step 6: Use data fusion technology to revise the distance between the end of the metal foreign body and the metal detector ,in, is the speed of the tape, The time from detecting the metal foreign object to stopping the vehicle; Step 7: Calculate the location of the center of the metal foreign body ,in is the speed of the tape, The time when the start position detection signal is 1; Step 8: Calculate the length and range of the metal foreign body; Step 9: Send the test results to the position indicating device to display the position and size of the metal foreign body.

[0011] The steps of calculating the length and range of the metal foreign body in step 8 are as follows: Step 11: Get the high level duration of the start position detection signal and tape running speed ; Step 12: Calculate the length of the metal foreign body ; Step 13: Calculate the extent of metallic foreign matter .

[0012] After adopting the above technical solution, the beneficial effects of the present invention are: (1) Under normal working conditions, the position detection device maintains a certain safe distance from the tape and does not contact the tape, thereby increasing the service life of the position detection device; (2) A working status detection circuit of the position detection device is added to monitor the contact performance between the position detection device and the tape in real time, and promptly detect system failures; (3) According to the working status of the position detection device, data fusion technology is used to fuse the measured data of the position detection device and the motion data of the tape conveyor to improve positioning accuracy. (4) In addition to providing the position information of the metal foreign body, the positioning system controller can also use the output of the metal detector to estimate the length and size of the metal foreign body, making it more convenient for workers to find metal foreign bodies. In short, the metal foreign body detection device proposed in the present invention has the advantages of long service life and accurate positioning, which can greatly reduce the time workers spend looking for metal foreign bodies, reduce the downtime of the tape conveyor, and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the metal foreign body positioning and marking system of the belt conveyor; Figure 2 Flow chart of metal foreign body positioning marking system for belt conveyor; Figure 3 This is the schematic diagram of the positioning system controller.

[0014] In the figure: 1-metal detector, 11-start position detection signal, 12-bar foreign body indication position, 13-large foreign body indication position, 14-small foreign body indication position, 2-material, 3-metal foreign body, 4-tape, 5-positioning system controller, 51-single chip microcomputer, 52-metal detection interface, 53-position detection interface, 54-acceleration sensor interface, 55-servo engine interface, 56-position indication interface, 6-position detection device, 61-fixing device, 62-servo engine, 63-elastic connecting rod, 64-distance measuring roller, 65-photoelectric encoder, 66-acceleration sensor, 7-position indication device. DETAILED DESCRIPTION

[0015] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0016] Example: like Figure 1-3 As shown, the metal foreign body positioning marking system of the tape conveyor includes a metal detector 1, a positioning system controller 5, a position detection device 6, and a position indicating device 7. The metal detector 1, the position detection device 6 and the position indicating device 7 are all electrically connected to the positioning system controller 5. The tape 4 is located between the metal detector 1 and the position detection device 6. The position detection device 6 includes a fixing device 61, a steering gear 62 and an elastic connecting rod 63. One end of the elastic connecting rod 63 is hinged to the fixing device 61, and the steering gear 62 is located on the side of the elastic connecting rod 63 away from the fixing device 61. The other end of the elastic connecting rod 63 is rotatably installed with a distance measuring roller, and a photoelectric encoder 65 is arranged between the distance measuring roller and the elastic connecting rod 63. An acceleration sensor 66 is also installed on the side of the elastic connecting rod 63 away from the photoelectric encoder 65.

[0017] The position detection device 6 is located below the tape 4 and maintains a certain safety distance from the tape 4. When the metal detector 1 detects the metal foreign body 3, the servo 62 controls the elastic connecting rod 63 of the position detection device 6 to rotate. At this time, the ranging roller will move toward the tape 4 with the rotation of the elastic connecting rod 63 until the ranging roller is close to the tape 4, and then start measuring the position.

[0018] The positioning system controller 5 includes a single-chip microcomputer 51, a metal detection interface 52, a position detection interface 53, a position indication interface 56, an acceleration sensor interface 54, and a servo interface 55. The metal detection interface 52, the position detection interface 53, the position indication interface 56, the acceleration sensor interface 54, and the servo interface 55 are all electrically connected to the single-chip microcomputer 51.

[0019] The metal detector 1 is electrically connected to the metal detection interface 52 , the position detection device 6 is electrically connected to the position detection interface 53 , the position indication device 7 is electrically connected to the position indication interface 56 , the acceleration sensor 66 is electrically connected to the acceleration sensor interface 54 , and the steering gear 62 is electrically connected to the steering gear interface 55 .

[0020] The photoelectric encoder 65 is installed in the central area of ​​the distance measuring roller, and the output end of the photoelectric encoder 65 is electrically connected to the position detection interface 53 .

[0021] The position indicating device 7 includes a display screen, which is electrically connected to the position indicating interface 56 and is used to display the position of the metal foreign body 3 .

[0022] In this solution, when the metal foreign body positioning marking system of the tape conveyor is working normally, the position detection device 6 does not contact the tape 4, and the photoelectric encoder 65 has no output at this time. When the metal detector 1 finds the metal foreign body 3, the metal detector 1 sends the shape of the metal foreign body 3 (bar foreign body indication position 12, large foreign body indication position 13, small foreign body indication position 14) to the single-chip microcomputer 51, and starts the position detection signal 11; when the positioning system controller 5 receives the start position detection signal 11, it starts the servo 62, and the servo 62 drives the elastic connecting rod 63 to move, so that the ranging roller is close to the tape 4, and the photoelectric encoder 65 starts to work and outputs a pulse signal proportional to the displacement of the tape 4. The pulse signal is sent to the counting pin of the single-chip microcomputer 51 through the position detection interface 53 to start counting, and the distance of the tape 4 is calculated according to the count value. The position indicating device 7 displays the shape and movement trajectory of the metal foreign body 3 in real time.

[0023] A method for positioning and marking metal foreign bodies in a tape conveyor comprises the following steps: Step 1: Under normal circumstances, the metal detector 1 starts the position detection signal 11 and the foreign body shape indicator (bar-shaped foreign body indicator 12, large foreign body indicator 13, small foreign body indicator 14) outputs are all 0. When the metal detector 1 detects a metal foreign body 3, the position detection signal 11 is started to output 1, and the foreign body shape is outputted at the corresponding position 1 of the bar-shaped foreign body indicator 12, the large foreign body indicator 13, and the small foreign body indicator 14; Step 2: When the start position detection signal 11 changes from 1 to 0, on the one hand, a stop signal is sent to the belt conveyor controller, and on the other hand, the position detection device 6 is started to start measuring the displacement of the belt 4; Step 3: After receiving the start signal, the position detection device 6 starts the steering gear 62 to make the distance measuring roller 64 close to the tape 4; Step 4: When the distance measuring roller 64 is in close contact with the tape, on the one hand, the acceleration sensor 66 is started to calculate the normalized mean square error of the acceleration sensor 66 , is the maximum value output by the acceleration sensor 66, The smaller the value, the closer the contact between the distance measuring roller 64 and the tape 4 of the detection system is, and the more accurate the measurement accuracy is. When the value is greater than a certain threshold, it indicates that the position detection device 6 is in poor contact with the tape 4, and an alarm is issued; on the other hand, the photoelectric encoder 65 rigidly connected to the distance measuring roller 64 outputs a distance measuring pulse; Step 5: Calculate the distance between the end of the metal foreign body 3 and the metal detector 1 ,in is the number of ranging pulses, is the radius of the distance measuring roller 64, is the resolution of the photoelectric encoder 65, is the speed of tape 4, is the start time of the position detection device 6; Step 6: Use data fusion technology to revise the distance between the end of the metal foreign body 3 and the metal detector 1 ,in, is the speed of tape 4, The time from detection of the metal foreign body 3 to parking; Step 7: Calculate the position of the center of the metal foreign body 3 ,in is the speed of tape 4, The time when the start position detection signal 11 is 1; Step 8: Calculate the length and range of the metal foreign body 3; Step 9: Send the detection result to the position indicating device 7 to display the position and size of the metal foreign body 3.

[0024] The steps of calculating the length and range of the metal foreign body 3 in step 8 are as follows: Step 11: Get the high level duration of the start position detection signal 11 and tape 4 running speed ; Step 12: Calculate the length of the metal foreign body 3 ; Step 13: Calculate the range of metal foreign matter 3 ; In summary, the advantages of this solution are as follows: (1) Under normal working conditions, the position detection device 6 maintains a certain safe distance from the adhesive tape 4 and does not contact the adhesive tape 4, thereby increasing the service life of the position detection device 6; (2) A working state detection circuit of the position detection device 6 is added to monitor the contact performance between the position detection device 6 and the adhesive tape 4 in real time, and timely discover system failures; (3) According to the working state of the position detection device 6, data fusion technology is used to fuse the measured data of the position detection device 6 and the motion data of the adhesive tape 4 machine to improve positioning accuracy. (4) In addition to providing the position information of the metal foreign body 3, the positioning system controller 5 can also use the output of the metal detector 1 to estimate the length and size of the metal foreign body 3, making it more convenient for workers to find the metal foreign body 3. In short, the metal foreign body 3 detection device proposed by the present invention has the advantages of long service life and accurate positioning, which can greatly reduce the time workers spend looking for metal foreign bodies 3, reduce the downtime of the adhesive tape 4 machine, and improve production efficiency.

[0025] The present invention is not limited to the above-mentioned specific implementation modes. Various changes made by ordinary technicians in this field based on the above-mentioned concepts without creative work are all within the protection scope of the present invention.

Claims

1. A metal foreign body positioning and marking system for a tape conveyor, comprising a metal detector (1), a positioning system controller (5), a position detection device (6), and a position indication device (7), wherein the metal detector (1), the positioning system controller (5), the position detection device (6), and the position indication device (7) are all electrically connected, and characterized in that: The adhesive tape (4) is located between the metal detector (1) and the position detection device (6); the position detection device (6) comprises a fixing device (61), a steering gear (62) and an elastic connecting rod (63); one end of the elastic connecting rod (63) is hinged to the fixing device (61); the steering gear (62) is located on a side of the elastic connecting rod (63) away from the fixing device (61); a distance measuring roller is rotatably mounted on the other end of the elastic connecting rod (63); a photoelectric encoder (65) is arranged between the distance measuring roller and the elastic connecting rod (63); and an acceleration sensor (66) is also mounted on a side of the elastic connecting rod (63) away from the photoelectric encoder (65).

2. According to the metal foreign body positioning marking system of the tape conveyor according to claim 1, it is characterized in that: The positioning system controller (5) comprises a single-chip microcomputer (51), a metal detection interface (52), a position detection interface (53) and a position indication interface (56); the metal detection interface (52), the position detection interface (53) and the position indication interface (56) are all electrically connected to the single-chip microcomputer (51).

3. According to claim 2, the metal foreign body positioning marking system for a belt conveyor is characterized in that: The metal detector (1) is electrically connected to the metal detection interface (52), the position detection device (6) is electrically connected to the position detection interface (53), and the position indication device (7) is electrically connected to the position indication interface (56).

4. The metal foreign body positioning marking system for a belt conveyor according to claim 2, characterized in that: The photoelectric encoder (65) is installed in the central area of ​​the distance measuring roller, and the output end of the photoelectric encoder (65) is electrically connected to the position detection interface (53).

5. The metal foreign body positioning marking system for a belt conveyor according to claim 3, characterized in that: The position indicating device (7) comprises a display screen, and the display screen is electrically connected to the position indicating interface (56).

6. A method for positioning and marking metal foreign bodies in a tape conveyor, characterized in that: The following steps are involved: Step 1: Under normal circumstances, the metal detector starts the position detection signal (11) and the foreign body shape indicator output are both 0. When the metal detector (1) detects a metal foreign body (3), the start position detection signal (11) outputs 1, and the type of the metal foreign body (3) is output by setting the corresponding metal foreign body (3) indicator position 1; Step 2: When the start position detection signal (11) changes from 1 to 0, on the one hand, a stop signal is sent to the belt conveyor controller, and on the other hand, the position detection device (6) is started to start measuring the displacement of the belt (4); Step 3: After receiving the start signal, the position detection device (6) starts the steering gear (62) to make the distance measuring roller (61) close to the tape (4); Step 4: When the distance measuring roller (64) is in close contact with the tape (4), on the one hand, the acceleration sensor (66) is started, and the normalized mean square error of the acceleration sensor (66) is calculated. , is the maximum value output by the acceleration sensor (66), The smaller the value, the closer the contact between the distance measuring roller (64) of the detection system and the adhesive tape (4) is, and the more accurate the measurement precision is. When the value is greater than a predetermined threshold value, it indicates that the position detection device (6) is in poor contact with the adhesive tape (4), and an alarm is issued; on the other hand, the photoelectric encoder (65) rigidly connected to the distance measuring roller (64) outputs a distance measuring pulse; Step 5: Calculate the distance between the end of the metal foreign body (3) and the metal detector (1) ,in is the number of ranging pulses, is the radius of the distance measuring roller (64), is the resolution of the photoelectric encoder (65), is the speed of the tape (4), is the start time of the position detection device (6); Step 6: Use data fusion technology to revise the distance between the end of the metal foreign body (3) and the metal detector (1). ,in, is the speed of the tape (4), is the time from detection of the metal foreign body (3) to parking; Step 7: Calculate the position of the center of the metal foreign body (3) ,in is the speed of the tape (4), The time when the start position detection signal (11) is 1; Step 8: Calculate the length and range of the metal foreign body (3); Step 9: Send the detection result to the position indicating device (7) to display the position and size of the metal foreign body (3).

7. The method for positioning and marking metal foreign bodies in a tape conveyor according to claim 6, characterized in that: The steps for calculating the length and range of the metal foreign body (3) in step 8 are as follows: Step 11: Get the high level duration of the start position detection signal (11) and the running speed of the tape (4) ; Step 12: Calculate the length of the foreign metal object (3) ; Step 13: Calculate the extent of the metallic foreign body (3) .

Images