CN103472066A - Full-automatic detection system and full-automatic detection method for sustainability of RFID (radio frequency identification device) logistic flat trays - Google Patents

Abstract

The invention relates to an automatic detection system and method for the reusability of RFID logistics flat pallets. The conveyor belt, the first elimination position, the second detection position, the second two-way ninety-degree rotating conveyor belt, the second elimination position, the stacking machine, the expandable detection position, and the pallet detection management system; Fully automatic inspection, the starting point and end point of the inspection line can be connected to the automatic elevated three-dimensional warehouse to reduce manual intervention; the palletizer and stacker are used to stack pallets to reduce the storage pallet space; the machine vision method is used to detect the damage of pallets, and the speed is fast , High accuracy; using clearing, reading and writing verification methods to detect the reliability of the RFID tag data embedded in the tray; each inspection item is uniformly dispatched and carried out in parallel according to the inspection management system.

Description

An automatic detection system and method for the reusability of RFID logistics flat pallets

technical field

The invention relates to a system and method for detecting the reusability of RFID logistics flat pallets, in particular to a system and method for fully automatic detection of the damage of circulating RFID logistics flat pallets and the reliability of RFID data, and belongs to the technical field of logistics detection equipment .

Background technique

Logistics flat pallet is an important carrier of modern logistics standardization. It is widely used in logistics processes such as cargo storage, handling, and transportation. Especially in fully automatic elevated three-dimensional storage, logistics flat pallet has the characteristics of high efficiency, safety and reliability.

As the carrier of cargo handling, the logistics flat pallet has mechanical strength and shape parameters that are crucial to its normal circulation in the storage system. In the modern intelligent warehousing system, in order to improve the digital and visual management of the logistics flat pallet, RFID tags are added to store the identity information of the logistics flat pallet itself and the data of the cargo. Therefore, the effectiveness and reliability of the RFID tag storage data It is also very important for the normal use of logistics flat pallets.

At present, there are multiple inspection items for the quality inspection of logistics flat pallets, including: appearance inspection, drop test, stacking test, lifting test, dimensional deviation test, dynamic load test, static load test, top deck edge impact test, compression test , bending test, drop test, vibration test, etc., the corresponding testing has more detailed verification standards at home and abroad, such as:

Standards ISO 8611-1-2004, ISO/TS 8611-2-3005, and ISO/TS 8611-3-2005 respectively stipulate the test methods and performance requirements of flat pallets for material handling; ISO 8611-1991 stipulates general intermodal transport Test methods for flat pallets, etc.

However, these logistics flat pallet inspection items and methods are all aimed at the newly produced logistics flat pallets, that is, whether they are qualified in quality and whether they can enter the logistics warehousing, transportation and circulation system. Since the new products are mass-produced, the materials and molds used are the same, and the quality of the new products is almost the same. Therefore, this kind of pallet inspection is carried out by a professional inspection organization with metrological verification qualification.

On the other hand, logistics flat pallets have multiple testing items, and each testing item needs to be completed with a separate testing site and special professional equipment, so the testing cycle is long and the cost is high.

During normal use, due to various reasons such as wear, mechanical collision, drop accidents, overweight and pressure, high temperature and high pressure, etc., the logistics flat pallets are gradually aging and damaged, and cannot meet the requirements of sustainability, so they need to be eliminated.

The simplest elimination rule is to stipulate the service life, and when the service life is reached, it will be eliminated uniformly. However, due to the aging and damage of logistics flat pallets in the process of use, the situation varies. If the service life is too long, a large number of aging pallets will be used beyond the time limit, which will cause potential safety hazards; if the service life is too short, pallets with acceptable quality will be forced to be eliminated, resulting in waste. Therefore, it is necessary to conduct a general inspection of each logistics flat pallet on a regular basis.

The difference between the general inspection of the sustainability of logistics flat pallets and the random inspection of new product access is that the purpose of the new product random inspection is to determine whether the quality of the entire batch of products meets the requirements through the inspection of the quality of the samples. Therefore, there are many inspection items and the inspection content In detail, the testing indicators are relatively strict; while the purpose of the general inspection of reusability is to determine whether each pallet can continue to be used, so the testing items that affect the main functions of the pallet are the main testing items, and the testing indicators can be appropriately relaxed.

However, since each logistics flat pallet needs to be inspected regularly, it is necessary to simplify the inspection method, improve inspection speed and inspection automation.

Notification number: CN2681129Y's utility model "pallet detection device" discloses a kind of through-beam photoelectric cell to detect the deformation of pallets, but the device can only detect specific wooden pallets, and it is used in the production line of pallets. Inspection can only be said to be a simple screening of whether pallets can enter the assembly line, not a systematic and independent inspection of pallets in circulation.

Contents of the invention

The purpose of the present invention is to provide a fully automatic detection system for the reusability of RFID logistics flat pallets. Rotary conveyor belt, first elimination position, second detection position, second two-way 90-degree rotary conveyor belt, second elimination position, stacking machine, expandable detection position, pallet detection management system;

The fully automatic elevated three-dimensional warehouse is used to store pallet stacks. The so-called pallet stacks are formed by vertically stacking a certain number of pallets of the same size. use pallet stacks of ten or twelve pallets;

The fully automatic elevated three-dimensional warehouse uses a fully automatic stacker to perform pallet storage/retrieval operations. The stacker has a programmable function. According to the detection task setting, undetected pallets are taken out and sent to the detection line, and stored in the detected stack of pallets;

The manual stacking position is connected by a conveyor belt, a 90-degree rotating conveyor belt, and a fully automatic elevated three-dimensional warehouse, and is used to send scattered pallet stacks to the detection assembly line. These pallet stacks are temporary insertion detection tasks, and the pallet detection management system is responsible for dispatching labor The order in which the pallets of the upper stack and the fully automatic elevated three-dimensional warehouse enter the inspection line;

The depalletizer disassembles the stack of pallets, and sends a single pallet to the subsequent detection position one by one;

The first detection position adopts machine vision method to detect the damage of the four sides of the tray. The industrial camera A and the industrial camera B are installed on both sides of the first detection position perpendicular to the detection line, and the acquisition tray is perpendicular to the two sides of the detection line. The image does not block the movement of the pallet on the detection line; industrial camera C and industrial camera D collect images of the two sides of the pallet along the direction of the detection line. In order not to block the movement of the pallet, install an industrial For camera C and industrial camera D, the collected images are first corrected by affine transformation and then detected;

After being detected by the first detection position and the first two-way 90-degree rotating conveyor belt, the pallets that meet the requirements of reusability enter the next detection position to continue testing, and the unsatisfactory pallets are sent to the first elimination position to be rejected;

The second detection bit adopts the RFID reader to clear the RFID tag, read and write verification operations, and detect the reliability of the RFID tag data embedded in the tray. After passing through the second two-way 90-degree rotating conveyor belt, the data reliability of the RFID tag is satisfied. The required pallets enter the next detection position to continue testing, and the unsatisfactory pallets are sent to the second elimination position;

The expandable detection bit is used to detect other items, for example: mechanical strength test;

The stacking machine will stack the pallets that have been inspected and meet the requirements of reusability one by one, and finally accumulate to the entire pallet stack, and send it into the fully automatic elevated three-dimensional warehouse;

Each detection position and elimination position of the detection system is connected by an automatic conveyor belt, and the pallet is automatically sent to the next position on the conveyor belt according to the detection result;

Each detection position of the detection system adopts a standard modular design. The pallet detection items can be increased or decreased, and the pallet detection order can be interchanged. The order of the detection items is arranged according to the elimination rate, that is, the detection items with a higher elimination rate are detected first;

The pallet detection management system controls the pallet movement sequence and time between each detection position of the detection system to achieve parallel detection, reduce the average detection cycle, and improve detection efficiency.

Using this detection system, the present invention also provides a fully automatic detection method for the reusability of RFID logistics flat pallets. The specific steps include:

1. Parallel execution unit 1:

Step 1: Manually load the pallet stack or transfer the pallet stack in the elevated warehouse;

Step 2: Pallet stacks are sent to the depalletizer;

Step 3: Remove a single tray;

Step 4: The tray is sent to the first detection position;

Step 5: Detect the damage of the pallet. Four industrial cameras collect images of the four sides of the pallet and evaluate the damage level: no obvious damage, slight damage, surface damage, structural damage, and serious damage; pallets with no obvious damage, slight damage, and surface damage can be Continue to use and enter the next inspection item; pallets with structural damage and serious damage are eliminated, and the pallets are sent to the first elimination position;

2. Parallel execution unit 2:

Step 6: The pallet is sent to the second detection position;

Step 7: Detect the reliability of the RFID tag;

Step 8: The RFID reader performs clearing operations and read-write inspection operations on the RFID tags embedded in the tray;

Step 9: Evaluate the reliability level: there are errors, operation delays, and no errors; pallets with errors are eliminated, and the pallets are sent to the second elimination position; pallets with operation delays and no errors can continue to be used, and enter the next inspection item;

3. Parallel execution unit 3:

Step 10: The tray is sent to the third detection position;

Step 11: The pallets are sent to the stacker, and after the entire pallet stack is stacked, the pallet stack is sent back to the high-bay warehouse.

To sum up, the obvious technical effect of the present invention lies in: realizing the automatic detection of flat pallets in RFID logistics intermodal transport, the detection items can be individually modularized, and the priority of the detection items can be adjusted according to the elimination rate, and the detection items can be increased or decreased. Expansion; both the starting point and the end point of the inspection line can be connected to the fully automatic elevated three-dimensional warehouse to reduce manual intervention; the palletizer and stacker are used to stack pallets to reduce the storage pallet space; the machine vision method is used to detect pallet damage, which is fast and accurate The accuracy is high; the data reliability of the RFID tag embedded in the tray is detected by the method of clearing and reading and writing verification; each inspection item is uniformly scheduled and carried out in parallel according to the inspection management system. The system has a high degree of automation, high detection efficiency, and high accuracy. It provides a technical means for the continuous usability detection of large-scale RFID logistics intermodal pallets in circulation, and has broad application prospects.

Description of drawings

Fig. 1 is the system structural diagram of a kind of RFID logistics flat tray sustainability detection system of the present invention;

Fig. 2 is a structural diagram of the unstacking machine and the stacking machine of an RFID logistics flat pallet reusability detection system of the present invention;

Fig. 3 is a flow chart of a method for detecting the reusability of an RFID logistics flat pallet according to the present invention.

Detailed ways

Referring to the accompanying drawings, the present invention will be described in detail below.

As shown in Fig. 1, a kind of RFID logistics flat pallet reusability detection system structural diagram of the present invention, the system structure consists of a fully automatic elevated three-dimensional warehouse 100, a manual stacking position 101, a depalletizing machine 104, a first detection position 105, The first two-way ninety-degree rotary conveyor belt 110, the first elimination position 111, the second detection position 112, the second two-way ninety-degree rotary conveyor belt 113, the second elimination position 114, the stacker 115, the expandable detection position 116, and the pallet The detection management system 117 is composed;

The fully automatic elevated three-dimensional warehouse 100 is used to store pallet stacks; a fully automatic stacker is used to perform pallet stacking/retrieval operations, and the stacker has a programmable function. According to the detection task setting, undetected pallet stacks are taken out and sent to detection Assembly line, and stored in the detected pallet stack;

The manual stacking position 101 is connected to the fully automatic elevated three-dimensional warehouse 100 through a conveyor belt 102, a ninety-degree rotating conveyor belt 103, and is used to send scattered pallet stacks to the detection assembly line. These pallet stacks are temporarily inserted detection tasks, pallet detection management The system 117 is responsible for scheduling the order in which the pallet stacks of the manual stacking position 101 and the fully automatic elevated three-dimensional warehouse 100 enter the inspection line;

The depalletizer 104 disassembles the stack of pallets, and sends a single pallet to the subsequent detection position one by one;

The first detection position 105 uses a machine vision method to detect damage to the four sides of the tray. The industrial camera A106 and the industrial camera B107 are installed on both sides of the first detection position 105 perpendicular to the detection line, and the collection tray is perpendicular to the two sides of the detection line. A side image does not block the movement of the pallet on the inspection line;

Industrial camera C108 and industrial camera D109 collect images of the two sides of the pallet along the detection line. In order not to block the movement of the pallet, the industrial camera C108 and industrial camera D109 are installed at an angle with the detection line. The collected images are first simulated. After the radiation transformation is corrected, the detection is carried out again;

After being detected by the first detection position 105 and passing through the first two-way 90-degree rotating conveyor belt 110, the trays that meet the requirements of reusability enter the next detection position to continue testing, and the unsatisfactory pallets are sent to the first elimination position 111 to be rejected;

The second detection position 112 uses an RFID reader to clear the RFID tag, read and write verification operations, detect the reliability of the RFID tag data embedded in the tray, and pass the second two-way ninety-degree rotating conveyor belt 113 to meet the requirements of the RFID tag data. Trays with reliability requirements enter the next detection position to continue detection, and pallets that do not meet the requirements are sent to the second elimination position 114;

The expandable detection position 116 is used to detect other items, for example: mechanical strength test;

The stacking machine 115 will stack the pallets that have been detected and meet the requirements of reusability one by one, and finally accumulate to the entire pallet stack, and send them into the fully automatic elevated three-dimensional warehouse 100;

The pallet detection management system 117 controls the pallet movement sequence and time between each detection position of the detection system, so as to realize parallel detection, reduce the average detection cycle, and improve detection efficiency.

As shown in FIG. 2 , the unstacking machine and the stacking machine are composed of a box body 200 , a tray locking mechanism 202 , and a tray lifting mechanism 203 .

The box body 200 is above the conveyor belt 204, and the tray 201 is sent to the right below the box body 200 by the conveyor belt 204. The tray lifting mechanism 203 lifts the tray 201 upwards, and the tray 201 pushes away the tray locking mechanism 202. The tray 201 is integrated with the existing tray stack. Moving upward, the pallet lifting mechanism 203 resets downward, and the pallet clamping mechanism 202 prevents pallets from falling to the conveyor belt 204, thus completing the stacking function.

When unstacking, the pallet elevating mechanism 203 lifts the entire pallet stack, the pallet clamping mechanism 202 pops up, releases the pallet stack, the pallet lifting mechanism 203 resets, the pallet stack moves down, releases the bottom pallet 201, and the pallet clamping mechanism 202 resets , to prevent the entire stack of pallets from falling onto the conveyor belt 204 , and the lowest pallet 201 falls onto the conveyor belt 204 .

As shown in Figure 3, a flow chart of a method for detecting the sustainability of an RFID logistics flat pallet according to the present invention, the specific steps include:

1. Parallel execution unit 1:

Step 1: Manually load the pallet stack 300 or transfer the pallet stack 301 in the elevated warehouse;

Step 2: the pallet stack is sent to the depalletizer 302;

Step 3: Take out the single tray 303;

Step 4: The pallet is sent to the first detection position 304;

Step 5: Detect pallet damage 305, four industrial cameras collect images of four sides of the pallet 306, and evaluate the damage level 307: no obvious damage 310, slight damage 311, surface damage 312, structural damage 308, serious damage 309, no obvious damage 310 , Slightly damaged 311 , and surface damaged 312 pallets can continue to be used and enter the next inspection item; structurally damaged 308 , severely damaged 309 pallets are eliminated, and the pallets are sent to the first elimination position 313 ;

2. Parallel execution unit 2:

Step 6: The tray is sent to the second detection position 314;

Step 7: Detect RFID tag reliability 315;

Step 8: The RFID reader performs a reset operation 316 and a read-write inspection operation 317 on the RFID tag embedded in the tray;

Step 9: Evaluate the reliability level 318: error exists 319, operation delay 320, no error 321, error exists 319 tray is eliminated, the tray is sent to the second elimination position 322; operation delay 320 and no error 321 tray can continue to be used, enter The next test item;

3. Parallel execution unit 3:

Step 10: The tray is sent to the third detection position 323;

Step 11: The pallets are sent to the stacker 324 , and after the entire pallet stack is stacked, the pallet stack is sent back to the high-bay warehouse 325 .

Claims (5)

1. a RFID logistics flat pallet can continue the property used automatic detection system, it is characterized in that: system architecture by full-automatic overhead stereo garage, artificial upper buttress position, unstacker, the first detecting position, the first two-way 90 degree carousels, first eliminate that position, the second detecting position, the second two-way 90 degree carousels, second are eliminated, the base stack machine, can expand detecting position, pallet detection management system forms;

Described full-automatic overhead stereo garage is for the storage tray buttress, adopt full-automatic piler to carry out stack of trays storage/access operation, piler has programmable functions, according to Detection task, sets, take out and not detect stack of trays and send into the detection streamline, and deposit in and detect stack of trays;

Described artificial upper buttress position is connected with full-automatic overhead stereo garage by travelling belt, 90 degree carousels, for to detecting streamline, sending into scattered stack of trays, these stack of trays are the interim Detection task inserted, and the stack of trays that pallet detection management system is responsible for scheduling artificial upper buttress position and full-automatic overhead stereo garage enters the order that detects streamline;

Described unstacker is disassembled stack of trays, successively to follow-up detecting position, sends single pallet;

The machine vision method that adopts described the first detecting position detects the damaged situation in four sides of pallet, industrial camera A and industrial camera B are arranged on the both sides perpendicular to the detection streamline of the first detecting position, gather the image of pallet perpendicular to two sides detecting streamline, do not stop that pallet is in the movement detected on streamline; Industrial camera C and industrial camera D gather the image of pallet along two sides detecting the streamline direction, in order not stop that pallet moves, with detect streamline position mounting industrial camera C and industrial camera D in an angle, after institute's image that gathers first passes through the affined transformation correction, then detected;

Detect through the first detecting position, through the first two-way 90 degree carousels, meet the pallet that can continue with the property requirement and enter next detecting position continuation detection, ungratified pallet is sent to first and eliminates position, is rejected;

Described the second detecting position adopts rfid interrogator to carry out zero clearing, read-write check operation to the RFID label, detect the embedded RFID label data of pallet reliability, through the second two-way 90 degree carousels, the pallet that meets RFID label data reliability requirement enters next detecting position to be continued to detect, and ungratified pallet is sent to second and eliminates position;

The described project of detecting position for detection of other of expanding;

Described base stack machine will detect, and meet can continue with the pallet of property requirement stacking one by one, final tired be laminated to whole stack of trays after, send into full-automatic overhead stereo garage.

2. a kind of RFID logistics flat pallet can continue the property used automatic detection system as claimed in claim 1, it is characterized in that: between each detecting position of detection system, superseded position, all adopt automatic conveying belt to connect, pallet according to testing result, automatically is sent to next position on travelling belt.

3. a kind of RFID logistics flat pallet can continue the property used automatic detection system as claimed in claim 1 or 2, it is characterized in that: each detecting position of detection system adopts the design of standard modularity, pallet test item changeable, the pallet detection order is interchangeable, the precedence of test item is just arranged by mortality, that is: the test item that mortality is higher more first detects.

4. a kind of RFID logistics flat pallet can continue the property used automatic detection system as claimed in claim 1, it is characterized in that: control pallet by pallet detection management system between each detecting position of detection system and move order and time, to realize paralleled detection, reduce the average detected cycle, improve detection efficiency.

5. a RFID logistics flat pallet can continue by the full-automatic detection method of property, and it is characterized in that: concrete steps comprise:

One, parallel execution unit one:

Step 1: artificial top tray buttress or shelf magazine are adjusted stack of trays;

Step 2: stack of trays is sent into unstacker;

Step 3: split out single pallet;

Step 4: pallet send the first detecting position;

Step 5: detect the damaged situation of pallet, four industrial cameras gather pallet four side images, assess damaged grade: without obvious damaged, slight breakage, surface fracture, structural failure, serious damage; Can continue use without obviously breakage, slight pallet damaged, surface fracture, enter next test item; The pallet of structural failure, serious damage is eliminated, and pallet send first to eliminate position;

Two, parallel execution unit two:

Step 6: pallet send the second detecting position;

Step 7: detect the RFID reliability;

Step 8:RFID read write line is carried out clear operation, read-write check operation to the embedded RFID label of pallet;

Step 9: assessment reliability grade: have mistake, operation delay, inerrancy; Exist wrong pallet to eliminate, pallet send second to eliminate position; Operation delay and faultless pallet can continue use, enter next test item;

Three, parallel execution unit three:

Step 10: pallet send the 3rd detecting position;

Step 11: pallet is sent into the base stack machine, tired be laminated to whole stack of trays after, stack of trays is sent shelf magazine back to.

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