Automatic online verification method for foreign matter detection equipment

Abstract

The invention relates to an automatic online verification method for foreign matter detection equipment, which comprises the following steps: a main conveyor belt penetrates through the foreign matter detection equipment, and a product continuously moves on the main conveyor belt and passes through the foreign matter detection equipment to be detected; unqualified products are detected and pushed out of the main conveying belt by the pushing mechanism; an auxiliary conveyor belt is arranged beside the main conveyor belt, and when the foreign matter detection equipment continuously detects products, the auxiliary conveyor belt transports standard samples; before standard samples are conveyed to the main conveying belt, the material moving mechanism moves products reaching the material moving mechanism to the auxiliary conveying belt through the first connecting belt, and then the products move towards the foreign matter detection equipment; the standard sample on the auxiliary conveying belt is moved to the main conveying belt through the second connecting belt and then moved to the foreign matter detection equipment for verification; if the foreign matter detection equipment has no fault, the standard sample is pushed out of the main conveyor belt by the pushing mechanism; the products on the auxiliary conveyor belt are moved to the main conveyor belt for continuous detection; if the foreign matter detection equipment has a fault, the standard sample is not pushed out, and shutdown maintenance is carried out.

Description

Technical Field

[0001] The invention belongs to the technical field of foreign object detection, and in particular relates to an automatic online verification method for foreign object detection equipment. Background Art

[0002] Foreign body detection is mainly used to detect whether the product contains prohibited substances, and is widely used in the fields of food, medicine, biotechnology, etc. At present, foreign body detection is mainly used to detect whether the product contains metal or solid substances. The most widely used are X-ray machines and metal detection equipment. The detection principle of the X-ray machine is that the detection equipment generates X-rays, and uses the penetration ability of X-rays to detect metal foreign bodies mixed in the product and non-metallic foreign bodies with higher density. The principle of the metal detection equipment is to use the principle of electromagnetic induction. The coil with alternating current generates a rapidly changing magnetic field. The magnetic field will induce eddy currents inside the metal object. The eddy current will generate a magnetic field, thereby affecting the original magnetic field and causing the detector to sound an alarm. When the X-ray machine or metal detection equipment detects unqualified products, the production equipment can remove the unqualified products in time. Therefore, whether the X-ray machine or metal detection equipment works normally is related to whether the critical control points (CCP) of physical hazards in the production process can be effectively controlled and whether unqualified products will flow into the market.

[0003] In the prior art, verification of whether foreign object detection equipment is working properly is basically done manually. Sampling management is random, and equipment problems may not be discovered in time due to the time and method of manual operation, resulting in unqualified products leaving the factory, which ultimately leads to product safety issues. Summary of the invention

[0004] In view of the above problems, the present invention provides an automatic online verification method for a foreign body detection device, comprising the following steps:

[0005] S1: The main conveyor belt passes through the foreign object detection device, and the product moves continuously on the main conveyor belt and passes through the foreign object detection device continuously to be detected;

[0006] S2: When the foreign body detection device detects unqualified products, the pushing mechanism on the main conveyor belt pushes the unqualified products out of the main conveyor belt;

[0007] S3: A secondary conveyor belt is provided next to the main conveyor belt. When the foreign body detection device continuously detects the product in steps S1 and S2, the secondary conveyor belt leads the standard sample to be transported toward the foreign body detection device.

[0008] S4: Before the standard sample reaches the main conveyor belt, the material transfer mechanism on the main conveyor belt pushes the products reaching the material transfer mechanism to the first connecting belt in sequence, and the products are then transferred to the auxiliary conveyor belt through the first connecting belt, and then move toward the foreign body detection device on the auxiliary conveyor belt;

[0009] S5: The standard sample on the auxiliary conveyor belt is moved to the main conveyor belt through the second connecting belt, and then transported to the foreign object detection device by the main conveyor belt for testing to verify whether the foreign object detection device has any faults;

[0010] At this time, there is no product on the main conveyor belt behind the standard sample, leaving time for the verification of the foreign body detection equipment;

[0011] S6: When the foreign body detection device is not faulty, the standard sample is pushed out of the main conveyor belt by the pushing mechanism; the product on the auxiliary conveyor belt is moved to the main conveyor belt through the second connecting belt, and the foreign body detection device continues to work; the material transfer mechanism stops working in time, so that the subsequent products are transported along the main conveyor belt again;

[0012] When the foreign object detection device fails, the standard sample is not detected and is carried out of the foreign object detection device by the main conveyor belt. At this time, the main conveyor belt, the auxiliary conveyor belt and the foreign object detection device are stopped and the foreign object detection device is repaired.

[0013] Optionally, a recovery box is provided below the main transmission belt for receiving unqualified products and standard samples that are pushed down; the foreign matter detection device corresponds to the recovery box up and down in the vertical direction.

[0014] Further optionally, the top surface of the recycling box is provided with an opening, and the surface of the opening is provided with a flexible interception net for cushioning the fallen products, and the center of the interception net is provided with an openable and closable through hole, which is retractable and expandable.

[0015] Optionally, the pushing mechanism includes a first hydraulic device, a first pushing rod and a first sensor, and the pushing mechanism is arranged in a detection channel of the foreign object detection device and is located at a downstream side of a detection probe of the foreign object detection device;

[0016] The first hydraulic device is arranged on the side of the main conveyor belt, the telescopic end of the first hydraulic device is perpendicular to the conveying direction of the main conveyor belt, and the telescopic end is connected to the first push rod, driving the first push rod to move in a direction away from or close to the first hydraulic device, thereby pushing the detected unqualified products out of the main conveyor belt;

[0017] The first push rod is parallel to the conveying direction of the main conveyor belt. A first sensor is respectively installed on both sides of the first push rod to sense the products passing by both sides of the first push rod.

[0018] Optionally, step S2 specifically includes: the products on the main conveyor belt pass through the detection probe of the foreign object detection device one by one for detection; the foreign object detection device, the first sensor, and the first hydraulic device are all communicatively connected to the master control device and are controlled by the master control device;

[0019] When the detection probe detects foreign matter inside the product, an alarm is sounded and the alarm signal is transmitted to the main control device, which then transmits the signal to the first hydraulic device, and the first hydraulic device enters a standby state; when the head of the unqualified product passes through the first sensor on the side of the first push rod, the first sensor transmits the sensed signal to the main control device, and when the tail end of the product passes through the same first sensor, the first sensor again transmits the sensed signal to the main control device, and after receiving the second signal from the first sensor, the main control device controls the first hydraulic device to drive the first push rod to move, and pushes the unqualified product off the main conveyor belt.

[0020] Optionally, in step S3, when the foreign object detection device is working normally, the standard sample moves toward the foreign object detection device on the sub-conveyor belt, and according to the verification cycle of the foreign object detection device, the moving speed of the sub-conveyor belt is adjusted so that the time for the standard sample to move from the upstream end of the sub-conveyor belt to the detection probe of the foreign object detection device is equal to the above-mentioned verification cycle.

[0021] Optionally, a verification vacant section is provided on the upstream side of the foreign body detection device, and the verification vacant section is a part of the main conveyor belt. During the verification of the foreign body detection device with a standard sample, it is verified that no product passes through the verification vacant section, so as to reserve time and space for verification;

[0022] The bottom end of the first connecting belt is arranged beside the head of the verified empty section, and the top end of the first connecting belt is close to the upstream end of the auxiliary conveyor belt and above the upstream end of the auxiliary conveyor belt, so as to transfer the products transported to the head of the verified empty section to the upstream side of the auxiliary conveyor belt.

[0023] Optionally, the material shifting mechanism comprises a second hydraulic device, a second push rod and a second sensor, and the material shifting mechanism is arranged at the head of the verification vacant section and corresponds to the position of the transport slot of the first connecting belt;

[0024] The second hydraulic device is arranged on the side of the main conveyor belt away from the first connecting belt. The telescopic end of the second hydraulic device is perpendicular to the conveying direction of the main conveyor belt. The telescopic end is connected to the second push rod, driving the second push rod to move in a direction away from or close to the second hydraulic device, thereby pushing the product that needs to be transferred to the auxiliary conveyor belt during verification into the transport slot of the first connecting belt.

[0025] The second push rod is parallel to the conveying direction of the main conveyor belt. A second sensor is installed on the side of the second push rod facing the first connecting belt to sense the products passing through the second push rod.

[0026] Optionally, in step S4, the second hydraulic device and the second sensor are both communicatively connected to the master control device; before verifying the foreign body detection device, when the standard sample is still moving on the auxiliary conveyor belt, and when the standard sample moves to the tail of the auxiliary conveyor belt, the master control device controls the material transfer mechanism to start working according to a preset time, and pushes the product reaching the second push rod to the transport slot of the first connecting belt;

[0027] When the product reaches the head of the verification empty section and passes through the second sensor, the second sensor transmits the sensed signal to the master control device. After receiving the signal, the master control device controls the second hydraulic device to push the second push rod outward to push the product into the first connecting belt; then, the second push rod is quickly withdrawn to prepare for pushing the next product;

[0028] The first connecting belt transports the carried product to the secondary conveyor belt. Specifically, when the transport slot carrying the product moves up to the top of the first connecting belt, the cover is opened, and the product is ejected onto the secondary conveyor belt. Then, the empty transport slot continues to move to the lower surface of the first connecting belt, and the third push rod pushes the cover back to its original position.

[0029] The material transfer mechanism repeats the above operation to verify that there is no product on the empty section, and the transferred product continues to move on the secondary conveyor belt.

[0030] Optionally, in step S5, the standard sample on the auxiliary conveyor belt is moved to the second connecting belt, and slides down along the second connecting belt to the main conveyor belt, moves along the main conveyor belt and enters the foreign object detection device to verify the foreign object detection device;

[0031] At this time, the products on the auxiliary conveyor belt move forward at a suitable speed. After the foreign object detection equipment verification is completed, the first product on the auxiliary conveyor belt can enter the second connecting belt, minimizing the working hours wasted due to the foreign object detection equipment verification.

[0032] Optionally, in step S6, when the standard sample reaches the main conveyor belt, the main control device controls the material transfer mechanism to stop working, and the product no longer enters the first connecting belt, but continues to be transported along the main conveyor belt; when all the products on the auxiliary conveyor belt slide to the main conveyor belt, the material transfer mechanism stops working and verifies that the first product transported on the empty section is connected to the last product transported by the auxiliary conveyor belt, so as to realize continuous detection of the assembly line. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of the structure of the implementation system of the automatic online verification method (top view);

[0034] Figure 2 for Figure 1 A side view schematic diagram of (omitting the second connecting belt);

[0035] Figure 3A schematic diagram of the transport slot.

[0036] In the accompanying drawings, 1-main conveyor belt, 2-foreign object detection equipment, 3-auxiliary conveyor belt, 4-standard sample, 5-first connecting belt, 6-second connecting belt, 7-material moving mechanism, 8-pushing mechanism, 9-detection channel, 10-recovery box, 11-third pushing rod, 12-resetting device, 13-first hydraulic device, 14-second hydraulic device, 15-first pushing rod, 16-second pushing rod, 17-first sensor, 18-second sensor, 19-detection probe, 20-verification empty section, 21-transport slot, 22-bottom plate, 23-guard plate, 24-chamber, 25-spring, 26-cover. DETAILED DESCRIPTION

[0037] This embodiment provides an automatic online verification method for a foreign body detection device 2, such as Figure 1-Figure 3 As shown, the following steps are included:

[0038] S1: The main conveyor belt 1 passes through the foreign object detection device 2, and the product moves continuously on the main conveyor belt 1 and continuously passes through the foreign object detection device 2 to be detected;

[0039] S2: When the foreign body detection device 2 detects unqualified products, the pushing mechanism 8 on the main conveyor belt 1 pushes the unqualified products out of the main conveyor belt 1;

[0040] S3: A secondary conveyor belt 3 is provided next to the main conveyor belt 1. When the foreign object detection device 2 continuously detects the product in steps S1 and S2, the secondary conveyor belt 3 leads the standard sample 4 to be transported in the direction of the foreign object detection device 2;

[0041] S4: before the standard sample 4 reaches the main conveyor belt 1, the material transfer mechanism 7 on the main conveyor belt 1 pushes the products reaching the material transfer mechanism 7 to the first connecting belt 5 in sequence, and the products are then moved to the auxiliary conveyor belt 3 through the first connecting belt 5, and then move on the auxiliary conveyor belt 3 toward the foreign body detection device 2;

[0042] S5: The standard sample 4 on the auxiliary conveyor belt 3 is moved to the main conveyor belt 1 through the second connecting belt 6, and then transported to the foreign object detection device 2 by the main conveyor belt 1 to be tested to verify whether the foreign object detection device 2 is faulty;

[0043] At this time, there is no product on the main conveyor belt 1 behind the standard sample 4, leaving time for the verification of the foreign body detection device 2;

[0044] S6: When the foreign body detection device 2 has no faults, the standard sample 4 is pushed out of the main conveyor belt 1 by the pushing mechanism 8; the product on the auxiliary conveyor belt 3 is moved to the main conveyor belt 1 through the second connecting belt 6, and the foreign body detection device 2 continues to work; the material transfer mechanism 7 stops working in time, so that the subsequent products are transported along the main conveyor belt 1 again;

[0045] When the foreign object detection device 2 fails, the standard sample 4 is not detected and is carried out of the foreign object detection device 2 by the main conveyor belt 1. At this time, the operation of the main conveyor belt 1, the auxiliary conveyor belt 3 and the foreign object detection device 2 is stopped, and the foreign object detection device 2 is repaired.

[0046] The automatic online verification method of the present invention sets a sub-conveyor belt 3 next to the main conveyor belt 1, and when the foreign object detection device 2 is not detected, the standard sample 4 used to verify the foreign object detection device 2 moves on the sub-conveyor belt 3. The foreign object detection device is an X-ray machine or a metal detection device. When it is necessary to detect the foreign object detection device 2, the standard sample 4 is moved from the second connecting belt 6 to the main conveyor belt 1, and then brought into the foreign object detection device 2 by the main conveyor belt 1. The standard sample 4 is made of metal or a substance that should be detected, and the shape and size of the standard sample 4 are the same as the product. If the standard sample 4 is pushed out of the main conveyor belt 1, it means that the foreign object detection device 2 is working normally. If the standard sample 4 is not pushed out of the main conveyor belt 1, it means that the foreign object detection device 2 has a fault and needs to be shut down for maintenance, and the previously detected products are recovered and re-tested.

[0047] Since the standard sample 4 is used to verify the foreign body detection device 2 online, the probability of failure of the foreign body detection device 2 is not high. If the transportation of the product is stopped every time the verification is performed, the working hours will be extended, which will seriously affect the production of the upstream products and cause a surge in the number of products to be tested. Therefore, the present invention designs a sub-conveyor belt 3. When the standard sample 4 needs to be verified, the subsequent products are diverted to the sub-conveyor belt 3 and continue to move on the sub-conveyor belt 3, without breaking the integrity and fluidity of the overall assembly line and affecting the upstream section. After the standard sample 4 passes through the foreign body detection device 2 and is verified to be fault-free, the products on the sub-conveyor belt 3 enter the main conveyor belt 1 one after another, and the material transfer mechanism 7 also stops working in time, so that the subsequent products can still be transported on the main conveyor belt 1, and the last product transported by the sub-conveyor belt 3 is connected to the main conveyor belt 1, so that the products after the standard sample 4 can still basically maintain the transportation state before verification, which has little impact on the overall assembly line operation.

[0048] Optionally, in step S1, a number of products are arranged in a straight line at equal intervals on the main conveyor belt, and the products move along the main conveyor belt 1 at a certain speed;

[0049] The foreign object detection device 2 has a detection channel 9 or a detection opening, so that the main drive belt can pass through the foreign object detection device 2 and be detected.

[0050] Optionally, a recovery box 10 is provided below the main transmission belt for receiving the unqualified products and standard samples 4 that are pushed down; the foreign matter detection device 2 corresponds to the recovery box 10 up and down in the vertical direction.

[0051] Further optionally, the top surface of the recycling box 10 is provided with an opening, the surface of the opening is provided with a flexible interception net, and the center of the interception net is provided with an openable and closable through hole, which is shrinkable and expandable, such as a through hole surrounding an elastic band. When the elastic band is tightened, the through hole shrinks and closes, and when the elastic band is relaxed, the through hole expands and opens.

[0052] When the product contains liquid, such as beverages or dairy products, it will be pushed off the main conveyor belt 1 and fall directly into the recycling bin 10, where it is likely to break and the liquid will splash. When the product falls directly into the recycling bin 10, it is also easy to bump into the product, affecting product recycling. The interception net intercepts the fallen products, and the elastic bands at the through holes are tightened by other machines, and the through holes are closed to prevent the products from falling directly. The interception net carries unqualified products and bears the gravity of the unqualified products. After the unqualified products are stabilized on the interception net, the tension detector detects that the tension on the interception net remains basically unchanged, and the interception net sags under the pressure of the product's gravity, and the distance from the bottom of the recycling bin 10 becomes smaller. The control machine relaxes the elastic band, the through holes open, and the products continue to fall into the recycling bin 10. The interception net plays a buffering role for the fallen products.

[0053] Optionally, the pushing mechanism 8 includes a first hydraulic device 13, a first pushing rod 15 and a first sensor 17, and the pushing mechanism 8 is arranged in the detection channel 9 of the foreign object detection device 2 and is located at the downstream side of the detection probe 19 of the foreign object detection device 2;

[0054] The first hydraulic device 13 is arranged on the side of the main conveyor belt 1 and is fixed in position and does not move with the main conveyor belt 1; the telescopic end of the first hydraulic device 13 is perpendicular to the conveying direction of the main conveyor belt 1, and the telescopic end is connected to the first push rod 15, driving the first push rod 15 to move in a direction away from or close to the first hydraulic device 13, thereby pushing the detected unqualified products out of the main conveyor belt 1;

[0055] The first push rod 15 is parallel to the conveying direction of the main conveyor belt 1 . A first sensor 17 is respectively installed on both sides of the first push rod 15 for sensing products passing by both sides of the first push rod 15 .

[0056] Further optionally, the telescopic end is a horizontal telescopic rod, and its height is higher than the top height of the product on the main conveyor belt 1 to avoid collision with the product; a gap is left between the bottom of the first push rod 15 and the upper surface of the main conveyor belt 1, and the first push rod 15 stays on one side of a straight line formed by the products when not working; the horizontal distance between the end of the first push rod 15 close to the detection probe 19 of the foreign object detection device 2 and the detection probe 19 is less than the length of a product, so that there is only one product between the detection probe 19 and the first push rod 15 to avoid pushing the product by mistake.

[0057] When in use, when the first push rod 15 moves in a direction away from the first hydraulic device 13, the unqualified product can be pushed off from the side of the main conveyor belt 1 away from the first hydraulic device 13; then, the first push rod 15 stays in place, waiting for the next movement; when the next unqualified product appears, the first push rod 15 moves in a direction close to the first hydraulic device 13, and pushes the unqualified product off from the side of the main conveyor belt 1 close to the first hydraulic device 13, thereby improving the utilization rate of the first push rod 15.

[0058] Optionally, step S2 specifically includes: the products on the main conveyor belt 1 pass through the detection probe 19 of the foreign object detection device 2 one by one for detection; the foreign object detection device 2, the first sensor 17, and the first hydraulic device 13 are all connected to the master control device for communication and are controlled by the master control device;

[0059] When the detection probe 19 detects foreign matter inside the product, it sounds an alarm and transmits the alarm signal to the main control device, which then transmits the signal to the first hydraulic device 13, and the first hydraulic device 13 enters a ready state; when the head of the unqualified product passes through the first sensor 17 on the side of the first push rod 15, the first sensor 17 transmits the sensed signal to the main control device, and when the tail end of the product passes through the same first sensor 17, the first sensor 17 again transmits the sensed signal to the main control device, and after receiving the second signal from the first sensor 17, the main control device controls the first hydraulic device 13 to drive the first push rod 15 to move, so as to push the unqualified product off the main conveyor belt 1.

[0060] Optionally, the auxiliary conveyor belt 3 is parallel to the main conveyor belt 1 and is located above the main conveyor belt 1. The moving direction of the auxiliary conveyor belt 3 is the same as the moving direction of the main conveyor belt 1. The moving speed of the auxiliary conveyor belt 3 can be adjusted automatically to facilitate the transportation of standard samples 4 and products at a suitable speed.

[0061] Optionally, in step S3, when the foreign object detection device 2 works normally, the standard sample 4 moves on the auxiliary conveyor belt 3 toward the foreign object detection device 2, and according to the verification cycle of the foreign object detection device 2, the moving speed of the auxiliary conveyor belt 3 is adjusted so that the time for the standard sample 4 to move from the upstream end of the auxiliary conveyor belt 3 to the detection probe 19 of the foreign object detection device 2 is equal to the above-mentioned verification cycle;

[0062] The moving speed of the main conveyor belt 1 remains unchanged. When the foreign object detection device 2 works normally, the moving speed of the auxiliary conveyor belt 3 is slower than that of the main conveyor belt 1.

[0063] Optionally, a verification vacant section 20 is provided on the upstream side of the foreign object detection device 2, and the verification vacant section 20 is a part of the main conveyor belt 1. During the verification of the foreign object detection device 2 with the standard sample 4, it is verified that no product passes through the verification vacant section 20, so as to reserve time and space for verification and avoid product retention on the main conveyor belt 1 near the foreign object detection device 2 (upstream side);

[0064] The tail of the verification idle section 20 extends to the foreign object detection device 2, and the bottom end of the first connecting belt 5 is set beside the head of the verification idle section 20. The top end of the first connecting belt 5 is close to the upstream end of the sub-conveyor 3 and is above the upstream end of the sub-conveyor 3. It is used to transfer the products transported to the head of the verification idle section 20 to the upstream side of the sub-conveyor 3.

[0065] Further optionally, the first connecting belt 5 is arranged to be inclined upward, and a plurality of outwardly protruding transport slots 21 are evenly provided on the outer surface of the track of the first connecting belt 5. The transport slots 21 are located in the middle of the first connecting belt 5, and all the transport slots are arranged in a straight line for receiving the products pushed by the material transfer mechanism 7. One product enters one transport slot 21 correspondingly, and then moves upward with the first connecting belt 5 (that is, moves toward the secondary conveyor belt 3).

[0066] Further optionally, the transport slot 21 includes a bottom plate 22 and guard plates 23 at both ends of the bottom plate, the bottom plate and the guard plates are perpendicular to the outer surface of the first connecting belt 5, one side of the bottom plate is connected to the outer surface of the first connecting belt 5, and the other side is suspended and points to the outside of the first connecting belt 5;

[0067] The guard plate is perpendicular to the base plate, the bottom edge of the guard plate is connected to one end of the base plate, one side edge is connected to the outer surface of the first connecting belt 5, and the top edge and the other side edge of the guard plate are suspended, so that the transport slot 21 forms a dustpan-like structure that is open upward and to the outside of the first connecting belt 5, which is convenient for receiving products.

[0068] Further optionally, a plurality of chambers 24 are evenly arranged inside the bottom plate of the transport slot 21, a spring 25 is arranged in each chamber 24, the bottom end of the spring 25 is fixedly connected to the bottom of the corresponding chamber 24, a cover 26 is arranged on the top of the spring 25, a plurality of retractable locking tongues are evenly arranged on the side of the cover 26, and a plurality of inwardly concave grooves are arranged on the inner wall at the top opening of the chamber 24, and the locking tongues correspond to the grooves one by one; the locking tongues are communicatively connected to the main control device;

[0069] When the spring 25 is compressed, the spring 25 is completely in the chamber 24, the cover 26 covers the opening at the top of the chamber 24, and the locking tongue extends into the corresponding groove, thereby retracting the spring 25, and the bottom plate of the transport slot 21 is flat, which is convenient for carrying products;

[0070] When the product needs to be moved onto the auxiliary conveyor belt 3 , the main control device controls the locking tongue to retract, and the cover 26 is pushed open by the spring 25 , thereby ejecting the product onto the auxiliary conveyor belt 3 .

[0071] Further optionally, a reset device 12 is provided below the first connecting belt 5, the reset device 12 is communicatively connected to the main control device, the reset device 12 has a plurality of retractable third push rods 11, the third push rods are tilted upward, and preferably parallel to the first connecting belt, and point to a fixed position on the lower surface of the first connecting belt 5, and the third push rods 11 correspond to the cover 26 one by one;

[0072] After the transport slot 21 ejects the product, it continues to move with the first connecting belt 5 to the lower surface of the first connecting belt 5, and the main control device controls the reset device 12 to extend the third push rod 11. The third push rod is perpendicular to the bottom plate of the transport slot 21, and the bottom end of the third push rod pushes the corresponding cover 26 back to the surface of the bottom plate. The main control device controls the lock tongue to extend and push into the groove to retract the cover 26.

[0073] Further optionally, gaps are left between the outer side of the bottom plate of the transport slot 21 (i.e., the side away from the first connecting belt 5) and the side of the main conveyor belt 1 and the side of the auxiliary conveyor belt 3 to avoid affecting the movement of the first connecting belt 5.

[0074] Optionally, the material moving mechanism 7 includes a second hydraulic device 14, a second push rod 16 and a second sensor 18, and the material moving mechanism 7 is arranged at the head of the verification vacant section 20 and corresponds to the position of the transport slot 21 of the first connecting belt 5;

[0075] The second hydraulic device 14 is arranged on the side of the main conveyor belt 1 away from the first connecting belt 5, and is fixed in position and does not move with the main conveyor belt 1; the telescopic end of the second hydraulic device 14 is perpendicular to the conveying direction of the main conveyor belt 1, and the telescopic end is connected to the second push rod 16, driving the second push rod 16 to move in a direction away from or close to the second hydraulic device 14, so as to push the products that need to be transferred to the auxiliary conveyor belt 3 during verification into the transport slot 21 of the first connecting belt 5;

[0076] The second push rod 16 is parallel to the conveying direction of the main conveyor belt 1 . A second sensor 18 is installed on the side of the second push rod 16 facing the first connecting belt 5 for sensing the products passing through the second push rod 16 .

[0077] Preferably, the end of the second push rod 16 close to the foreign object detection device 2 is the tail end, and the second sensor 18 is arranged at a position close to the tail end of the second push rod 16 .

[0078] Optionally, in step S4, the second hydraulic device 14 and the second sensor 18 are both communicatively connected to the master control device; before verifying the foreign body detection device 2, when the standard sample 4 is still moving on the auxiliary conveyor belt 3, and when the standard sample 4 moves to the tail of the auxiliary conveyor belt 3, the master control device controls the material transfer mechanism 7 to start working according to the preset time, and pushes the product reaching the second push rod 16 to the transport slot 21 of the first connecting belt 5;

[0079] When the product reaches the head of the verification empty section 20 and passes through the second sensor 18, the second sensor 18 transmits the sensed signal to the master control device. After receiving the signal, the master control device controls the second hydraulic device 14 to push the second push rod 16 outward to push the product into the transport slot 21; then, the second push rod 16 is quickly withdrawn to prepare for pushing the next product;

[0080] When the transport slot 21 carrying the product moves up to the top of the first connecting belt 5, the cover 26 is opened, and the product is ejected onto the auxiliary conveyor belt 3, and then the empty transport slot 21 continues to move to the lower surface of the first connecting belt 5, and the third push rod pushes the cover 26 back to its original position;

[0081] The material transfer mechanism 7 repeats the above operation to verify that there is no product on the empty section 20 , and the transferred product continues to move on the secondary conveyor belt 3 .

[0082] Optionally, a very small gap is left between the top end of the second connecting belt 6 and the tail end of the auxiliary conveyor belt 3, which does not affect the movement of the auxiliary conveyor belt 3 and enables the top end of the second connecting belt 6 to receive the products transmitted by the auxiliary conveyor belt 3; the width of the top end of the second connecting belt 6 is equal to the width of the auxiliary conveyor belt 3;

[0083] The bottom end of the second connecting belt 6 is close to the main conveyor belt 1, and the bottom end of the second connecting belt 6 is higher than the height of the product on the main conveyor belt 1, so it does not affect the transportation of the product on the main conveyor belt 1; the width of the bottom end of the second connecting belt 6 is slightly larger than the width of the product; the tail part of the second connecting belt 6 is parallel to the moving direction of the main conveyor belt 1. Vertical baffles are respectively provided on both sides of the second connecting belt 6 to prevent the standard sample 4 or the product on the second connecting belt 6 from escaping from the second connecting belt 6.

[0084] Optionally, in step S5, the standard sample 4 on the auxiliary conveyor belt 3 is moved to the second connecting belt 6, and slides down along the second connecting belt 6 to the main conveyor belt 1, moves along with the main conveyor belt 1 and enters the foreign object detection device 2 to verify the foreign object detection device 2;

[0085] At this time, the products on the auxiliary conveyor belt 3 move forward at a suitable speed. After the foreign object detection device 2 completes the verification, the first product on the auxiliary conveyor belt 3 can enter the second connecting belt 6, thereby minimizing the working hours wasted due to the verification of the foreign object detection device 2.

[0086] Optionally, in step S6, when the standard sample 4 reaches the main conveyor belt 1, the main control device controls the material transfer mechanism 7 to stop working, and the product no longer enters the first connecting belt 5, but continues to be transported along the main conveyor belt 1; when all the products on the auxiliary conveyor belt 3 slide to the main conveyor belt 1, the material transfer mechanism 7 stops working and verifies that the first product transported on the empty section 20 is connected to the last product transported by the auxiliary conveyor belt 3, thereby realizing continuous detection of the assembly line.

[0087] The main control device reasonably adjusts the speed of the auxiliary conveyor belt 3, the number of products transferred to the auxiliary conveyor belt 3, and the time when the material transfer mechanism 7 stops working through the total number of products, product spacing, the length of the auxiliary conveyor belt 3, and the length of the verified empty section 20 to achieve the above purpose.

[0088] Optionally, in step S6, if the foreign object detection device 2 fails, the products on the auxiliary conveyor belt 3 and the products on the verification empty section 20 are recovered, and after the foreign object detection device 2 is repaired, the main conveyor belt 1 is moved to the foreign object detection device 2 according to the normal process to be inspected;

[0089] The verification cycles of the foreign object detection device 2 are equal, that is, the time intervals between the two verifications are the same; if the foreign object detection device 2 fails, all products tested after the last verification will be recovered and tested again.

[0090] The main conveyor belt, the auxiliary conveyor belt and the first connecting belt of the present invention are all conventional roller-driven conveyor belts.

Claims

1. An automatic online verification method for a foreign body detection device, characterized in that: The following steps are involved: S1: The main conveyor belt passes through the foreign object detection device, and the product moves continuously on the main conveyor belt and passes through the foreign object detection device continuously to be detected; S2: When the foreign body detection device detects unqualified products, the pushing mechanism on the main conveyor belt pushes the unqualified products out of the main conveyor belt; S3: A secondary conveyor belt is provided next to the main conveyor belt. When the foreign body detection device continuously detects the product in steps S1 and S2, the secondary conveyor belt leads the standard sample to be transported toward the foreign body detection device. S4: Before the standard sample reaches the main conveyor belt, the material transfer mechanism on the main conveyor belt pushes the products reaching the material transfer mechanism to the first connecting belt in sequence, and the products are then transferred to the auxiliary conveyor belt through the first connecting belt, and then move toward the foreign body detection device on the auxiliary conveyor belt; S5: The standard sample on the auxiliary conveyor belt is moved to the main conveyor belt through the second connecting belt, and then transported to the foreign object detection device by the main conveyor belt for testing to verify whether the foreign object detection device has any faults; At this time, there is no product on the main conveyor belt behind the standard sample, leaving time for the verification of the foreign body detection equipment; S6: When the foreign body detection device has no faults, the standard sample is pushed out of the main conveyor belt by the pushing mechanism; the product on the auxiliary conveyor belt is moved to the main conveyor belt through the second connecting belt, and the foreign body detection device continues to work; The material transfer mechanism stops working in time, so that the subsequent products can be transported along the main conveyor belt again; When the foreign object detection device fails, the standard sample is not detected and is carried out of the foreign object detection device by the main conveyor belt. At this time, the main conveyor belt, the auxiliary conveyor belt and the foreign object detection device are stopped and the foreign object detection device is repaired.

2. The automatic online verification method of a foreign body detection device according to claim 1, characterized in that: A recovery box is provided below the main transmission belt to receive the unqualified products and standard samples pushed down; the foreign body detection device corresponds to the recovery box in the vertical direction; The top surface of the recycling box is provided with an opening, and the surface of the opening is provided with a flexible interception net for cushioning the fallen products. A through hole that can be opened and closed is provided in the center of the interception net, and the through hole is retractable and expandable.

3. The automatic online verification method of a foreign body detection device according to claim 1, characterized in that: The pushing mechanism includes a first hydraulic device, a first pushing rod and a first sensor, and the pushing mechanism is arranged in the detection channel of the foreign object detection device and is located at the downstream side of the detection probe of the foreign object detection device; The first hydraulic device is arranged on the side of the main conveyor belt, the telescopic end of the first hydraulic device is perpendicular to the conveying direction of the main conveyor belt, and the telescopic end is connected to the first push rod, driving the first push rod to move in a direction away from or close to the first hydraulic device, thereby pushing the detected unqualified products out of the main conveyor belt; The first push rod is parallel to the conveying direction of the main conveyor belt. A first sensor is respectively installed on both sides of the first push rod to sense the products passing by both sides of the first push rod.

4. The automatic online verification method of a foreign body detection device according to claim 3, characterized in that: Step S2 specifically includes: the products on the main conveyor belt pass through the detection probe of the foreign object detection device one by one for detection; the foreign object detection device, the first sensor, and the first hydraulic device are all connected to the master control device for communication and are controlled by the master control device; When the detection probe detects foreign matter inside the product, an alarm is sounded and the alarm signal is transmitted to the main control device, which then transmits the signal to the first hydraulic device, and the first hydraulic device enters a standby state; when the head of the unqualified product passes through the first sensor on the side of the first push rod, the first sensor transmits the sensed signal to the main control device, and when the tail end of the product passes through the same first sensor, the first sensor again transmits the sensed signal to the main control device, and after receiving the second signal from the first sensor, the main control device controls the first hydraulic device to drive the first push rod to move, and pushes the unqualified product off the main conveyor belt.

5. The automatic online verification method of a foreign body detection device according to claim 1, characterized in that: In step S3, when the foreign object detection device is working normally, the standard sample moves toward the foreign object detection device on the sub-conveyor belt, and according to the verification cycle of the foreign object detection device, the moving speed of the sub-conveyor belt is adjusted so that the time for the standard sample to move from the upstream end of the sub-conveyor belt to the detection probe of the foreign object detection device is equal to the above-mentioned verification cycle.

6. The automatic online verification method of a foreign body detection device according to claim 1, characterized in that: A verification vacant section is set on the upstream side of the foreign body detection device, and the verification vacant section is a part of the main conveyor belt. During the verification of the foreign body detection device with a standard sample, it is verified that no product passes through the verification vacant section, so as to reserve time and space for verification; The bottom end of the first connecting belt is arranged beside the head of the verified empty section, and the top end of the first connecting belt is close to the upstream end of the auxiliary conveyor belt and above the upstream end of the auxiliary conveyor belt, so as to transfer the products transported to the head of the verified empty section to the upstream side of the auxiliary conveyor belt.

7. The automatic online verification method of a foreign body detection device according to claim 6, characterized in that: The material shifting mechanism comprises a second hydraulic device, a second push rod and a second sensor, and the material shifting mechanism is arranged at the head of the verification vacant section and corresponds to the position of the transport slot of the first connecting belt; The second hydraulic device is arranged on the side of the main conveyor belt away from the first connecting belt; the telescopic end of the second hydraulic device is perpendicular to the conveying direction of the main conveyor belt, and the telescopic end is connected to the second push rod to drive the second push rod to move in a direction away from or close to the second hydraulic device; The second push rod is parallel to the conveying direction of the main conveyor belt. A second sensor is installed on the side of the second push rod facing the first connecting belt to sense the products passing through the second push rod.

8. The automatic online verification method of a foreign body detection device according to claim 7, characterized in that: In step S4, the second hydraulic device and the second sensor are both connected to the master control device in communication; before verifying the foreign body detection device, when the standard sample is still moving on the auxiliary conveyor belt, and when the standard sample moves to the tail of the auxiliary conveyor belt, the master control device controls the material transfer mechanism to start working according to the preset time, and pushes the product reaching the second push rod onto the first connecting belt; When the product reaches the head of the verification empty section and passes through the second sensor, the second sensor transmits the sensed signal to the master control device. After receiving the signal, the master control device controls the second hydraulic device to push the second push rod outward to push the product into the first connecting belt; then, the second push rod is quickly withdrawn to prepare for pushing the next product; The first connecting belt transports the carried products to the auxiliary conveyor belt; The material transfer mechanism repeats the above operation to verify that there is no product on the empty section, and the transferred product continues to move on the secondary conveyor belt.

9. The automatic online verification method of a foreign body detection device according to claim 1, characterized in that: In step S5, the standard sample on the auxiliary conveyor belt is moved to the second connecting belt, and slides down along the second connecting belt to the main conveyor belt, moves along the main conveyor belt and enters the foreign object detection device to verify the foreign object detection device; At this time, the products on the auxiliary conveyor belt move forward. After the foreign object detection equipment has completed the verification, the first product on the auxiliary conveyor belt can enter the second connecting belt, minimizing the working hours wasted due to the verification of the foreign object detection equipment.

10. The automatic online verification method of a foreign body detection device according to claim 1, characterized in that: In step S6, when the standard sample reaches the main conveyor belt, the main control device controls the material transfer mechanism to stop working, and the product no longer enters the first connecting belt, but continues to be transported along the main conveyor belt; when all the products on the auxiliary conveyor belt slide to the main conveyor belt, the material transfer mechanism stops working and verifies that the first product transported on the empty section is connected to the last product transported by the auxiliary conveyor belt, so as to realize continuous detection of the assembly line.

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