Automobile crane counterweight identification system and method based on radio frequency identification technology

Abstract

The invention discloses an automobile crane counterweight identification system and method based on the radio frequency identification technology, radio frequency tags are attached to balancing weights in advance, the tags are in one-to-one correspondence with the balancing weights, and the weights, models, identification information and redundant data of the balancing weights are recorded; the radio frequency reader-writer and the antenna are used for reading the EPC code of the label on the balancing weight and transmitting data to a control system of the crane; and the control system analyzes the obtained EPC code, verifies the format and data integrity of the EPC code, and calculates the total balance weight of the balancing weight according to the label information. When the balancing weight is not used, the metal protective shell can shield radio frequency signals, and the tag without the balancing weight is prevented from being misread. According to the method, the balancing weights can be automatically recognized, the total balance weight can be calculated, the balance weight recognition accuracy is improved, the balance weight management problem caused by human errors is avoided, and the operation safety and the working efficiency are remarkably improved.

Description

Technical Field

[0001] This patent relates to the field of crane technology, and in particular to a counterweight identification system for truck cranes based on radio frequency identification (RFID) technology and its working method. Background Technology

[0002] In heavy machinery, the installation and management of counterweights are crucial for equipment stability and operational safety. Current counterweight identification methods primarily rely on manual measurement and recording, but these methods are susceptible to human error, inefficiency, and operational complexity. Therefore, there is an urgent need for an automated, efficient, and accurate counterweight identification method to optimize counterweight management.

[0003] Radio Frequency Identification (RFID) technology has been widely used in areas such as item tracking and identification due to its advantages such as non-contact identification, adjustable reading distance, and fast response speed. Based on this technology, this invention proposes a system and method for automatic identification of counterweights, aiming to improve the accuracy and efficiency of counterweight identification. Summary of the Invention

[0004] The purpose of this invention is to provide a counterweight identification system for truck cranes based on radio frequency identification (RFID) technology and its working method, which solves the defects of traditional counterweight identification methods, enables intelligent counterweight management, avoids human intervention, and improves the accuracy and efficiency of counterweight identification.

[0005] The technical solution adopted in this invention is: This solution employs Radio Frequency Identification (RFID) technology for the automatic identification and management of counterweights. Based on the requirements of truck cranes, a highly efficient, accurate, and scalable counterweight identification system has been designed. This system comprises several key components, including RFID tags, readers, antennas, and a controller system. The system can acquire information about the items in real time, enabling automated management.

[0006] The technical solution adopted in this invention is: A counterweight identification system for a truck crane based on radio frequency identification (RFID) technology, the system comprising RFID tags, RFID readers, antennas, a controller system, and an interference protection module; The RFID tag is used to store the electronic product code of the counterweight, which includes a weight indication area, a counterweight identification area, a redundant tag identification area, and a blank area. The radio frequency reader, in conjunction with multiple external antennas, reads the electronic product code of the radio frequency tag affixed to the counterweight by transmitting radio frequency signals; The controller system verifies the format and data integrity of the received electronic product code. The system merges redundant information based on the data in the redundant tag identification area to ensure the accuracy of RFID tag reading, and calculates the weight of the counterweight and the total counterweight. The interference signal protection module includes a metal protective shell, which is used to block the RFID tag when the counterweight is not in use, so as to shield the RFID signal and thus prevent the RFID tag without the counterweight from being misread.

[0007] Furthermore, the RFID tag is an anti-metal tag and has long-distance identification capability, high temperature resistance, and impact resistance.

[0008] Furthermore, the RF reader is connected to the controller system via an RS485 cable.

[0009] Furthermore, the radio frequency reader adopts a split design that is waterproof, dustproof, surge-resistant, and shock-resistant.

[0010] A method for identifying the counterweight of a truck crane based on radio frequency identification (RFID) technology, implemented through the system described in this invention, involves using an RFID reader to read the electronic product code from the RFID tag affixed to the counterweight block, transmitting the reading / writing result to the controller system, and calculating the weight of the counterweight block and the total counterweight using the RFID code parsed by the controller system. The method includes the following steps: Step 1: Attach the corresponding RFID tag to the counterweight. The RFID tag stores an electronic product code, which includes a weight indication area, a counterweight identification area, a redundant tag identification area, and a blank area. Step 2: Read the electronic product code of the RFID tag using an RFID reader and antenna, and transmit the electronic product code to the controller system; Step 3: The controller system performs format and data integrity checks on the electronic product code and merges redundant information based on the data in the redundant tag identification area; Step 4: Calculate the weight of the counterweight and its total counterweight value based on the information in the electronic product code.

[0011] Furthermore, it also includes the following steps: Step 5: When the counterweight is not in use, shield the radio frequency signal with a metal protective shell to avoid misreading RFID tags that do not have a counterweight installed; Step 6: If the system detects an abnormality in the counterweight or a reading failure, it will issue an alarm signal to remind the user.

[0012] The beneficial effects of this invention are: 1. Improve the accuracy of counterweight identification. Traditional counterweight management methods often rely on manual measurement and recording. In complex working environments, manual counting can lead to misreading and omissions. By employing radio frequency identification (RFID) technology, this invention significantly improves the accuracy of counterweight identification. Each counterweight in the RFID system is affixed with an independent RFID tag, and each tag contains a unique Electronic Product Code (EPC) containing key information such as the counterweight's weight. The contactless nature of RFID technology makes the identification process not only fast but also avoids errors caused by contact or environmental factors.

[0013] 2. Improve work efficiency and save time and costs. When dealing with a large number of counterweights in complex terrain, manual operation requires drivers or other engineers to travel to specific locations for observation and counting, which is inefficient and unsafe. Radio Frequency Identification (RFID) systems can automatically read the information of each counterweight, requiring only commands via the control panel. This reduces human error, and the system can automatically scan and identify all counterweights within seconds, significantly increasing work speed. Furthermore, by reducing manual operation, the system also lowers labor costs and mitigates potential risks associated with manual work, improving overall efficiency and economic benefits.

[0014] 3. Strong anti-interference ability and adaptable to complex environments. In real-world working environments, RFID technology faces numerous challenges, including metal obstruction, electromagnetic interference, and improper tag angles. The counterweight identification system of this invention possesses strong anti-interference capabilities and can operate stably in complex environments. First, the RFID tag design fully considers the issues of metal interference and obstruction. In this system, the tags are made of anti-metal materials, and during installation, the system optimizes the antenna position and angle to avoid interference from metal objects. The RFID tags exchange data via electromagnetic coupling, ensuring stable communication between the tags and the reader. Furthermore, the system employs redundant tag technology. If some tags fail to be read due to obstruction or improper placement, redundant tags provide additional protection, preventing the counterweight from being missed due to tag reading failures. Through the redundant tag design, the system ensures accurate identification of each counterweight, thereby enhancing the system's reliability in complex environments.

[0015] 4. System scalability and flexibility The counterweight identification system of this invention not only exhibits strong adaptability to existing application environments but also good scalability. The system configuration can be flexibly adjusted according to the needs of different models and environments. For example, due to differences in truck crane models and tonnage, the placement of counterweights may vary. Parameters such as the placement of RFID tags, the number and position of antennas, etc., can be adjusted to ensure efficient counterweight identification in various working scenarios. Furthermore, the system design possesses strong modular characteristics. In the future, with technological advancements and changing demands, the system can be easily upgraded and expanded. For example, the system's functionality can be expanded by adding new sensors or devices, or the system can be customized to meet the diverse needs of different users. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the weight identification system of the present invention.

[0017] Figure 2 This is a flowchart of the counterweight identification system of the present invention.

[0018] Figure 3 This is a schematic diagram of the EPC code division of the radio frequency tag of the present invention. Detailed Implementation

[0019] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0020] The truck crane counterweight identification system based on radio frequency identification technology provided by this invention is shown in the appendix. Figure 1 The system of this invention includes RFID tags, RFID readers, antennas, a controller system, and an interference protection module. The system is connected via a feeder with an aviation interface, wherein the RFID reader is connected to the controller system using an RS485 cable. The configuration and implementation of the system are described in detail below.

[0021] 1. Selection and configuration of RFID tags Radio frequency tags (RFID) are a core component of RFID systems, primarily used to store and transmit information about the counterweight. RFID tags on the counterweights should possess high stability, durability, and strong anti-interference capabilities, enabling them to operate stably for extended periods in complex environments. Based on the operational characteristics of heavy-duty cranes, anti-metal tags are selected, featuring anti-metal properties, long-distance identification capabilities, and high-temperature and impact resistance. To prevent RFID tags from becoming unreadable due to obstruction or improper placement, redundant tags are added to each counterweight. When a particular RFID tag becomes unreadable, the redundant tag ensures the counterweight can still be accurately identified.

[0022] 2. RF Reader and Antenna Design The RFID reader is responsible for communication and data exchange with the RFID tags. Based on the specific requirements of the working environment, a separate RFID reader with separate antennas was selected, featuring waterproof, dustproof, surge-resistant, and shock-resistant characteristics. This reader can be configured with multiple external antennas, enabling effective reading of RFID tags within a 20-meter range. It reads the EPC code of the RFID tags affixed to the counterweight by transmitting radio frequency signals.

[0023] By strategically arranging the antennas, metal obstruction can be minimized, thus improving the recognition rate of the counterweights. This system employs standard RFID protocols for data transmission. The reader exchanges data with the RFID tag via radio frequency signals, reading the counterweight's identification information in real time. The reader communicates with the controller system via serial or Ethernet ports, ensuring stable data transmission.

[0024] 3. Data Processing and Calculation Module The controller system parses the EPC code data read by the RFID reader, verifies the format and data integrity of the received EPC code, merges redundant information based on the data in the redundant tag identification area, and extracts the specific information of the counterweight to ensure the accuracy of RFID tag reading. The system can calculate the weight of each counterweight based on the read EPC code and summarize the total counterweight.

[0025] Each counterweight is affixed with an RFID tag, which stores a unique Electronic Product Code (EPC code). See appendix. Figure 3 A schematic diagram of the EPC code division of the RFID tag shows that the EPC code is divided into a weight indication area, a counterweight identification area, a redundant tag identification area, and a blank area.

[0026] Weight indication area: Used to identify the specific weight of the counterweight, usually in 4-digit hexadecimal code. For example, "1001" represents a 5kg counterweight, "1002" represents a 10kg counterweight, "1000" represents a 30kg counterweight, etc.

[0027] Counterweight identification area: A unique code that identifies each counterweight.

[0028] Redundant tag identification area: Used to identify the redundant tags on the redundant blocks.

[0029] Blank area: Reserved space for future expansion.

[0030] First, the received EPC code undergoes format verification. The EPC code should conform to the predetermined length (16 bits), and the length and content of each part should comply with the specified rules. In actual working environments, there may be some interference sources, such as radio frequency signals from other devices, unauthorized RFID tags, etc. These interference signals can affect the accuracy of RFID. The system will filter the received EPC codes, automatically identifying and rejecting non-standard RFID tag data.

[0031] Secondly, the received EPC code undergoes data integrity verification. Because RFID tags incorporate redundant information, if a portion of the RFID tag fails to be read, the redundant tag distinguishing code will compensate. Therefore, the system first checks for valid redundant tags; if found, the information from the redundant tags is merged to ensure that data is not counted repeatedly.

[0032] Finally, by parsing the EPC code, the system can identify the weight of each counterweight. For example, if the read EPC code "1001" corresponds to a 5kg counterweight, the system will convert it into the corresponding weight value. Based on the read EPC code of each counterweight, the system counts the number of counterweights in each weight category, performs a weighted sum of these data, and finally calculates the total counterweight of the equipment.

[0033] 4. Interference signal protection module Radio frequency (RF) signals are easily affected by environmental factors, especially in working environments with complex magnetic fields, where interference signals may occur. This system can automatically identify and eliminate interference signals from other interfering RF tags, preventing them from affecting the weight reading results.

[0034] To prevent misreading of RFID tags without counterweights, this system adds a metal protective shell to the RFID tag. The metal protective shell is a metal protective device installed on top of the tag, and its protection is achieved through a sliding mechanism. The metal protective shell can be opened or closed to shield the RFID tag from receiving and returning radio frequency signals, preventing misreading when the counterweight is not in use.

[0035] 5. System Integration and User Interface The system displays the quantity of counterweights for each weight category and their corresponding EPC codes through a graphical user interface (GUI) or console, facilitating user viewing and verification. Simultaneously, the system displays the calculated total equipment counterweight data, helping operators understand the current counterweight status. If the counterweight does not meet safety requirements or an anomaly occurs (such as missing counterweights, reading failure, etc.), the system will automatically issue an alarm and alert the user through audible and visual alarms or on-screen prompts.

[0036] Appendix Figure 2The present invention illustrates a method for identifying the counterweight of a truck crane based on radio frequency identification (RFID) technology, comprising the following steps: Step 1: Install the antenna and attach the corresponding RFID tag to the counterweight. The RFID tag stores the EPC code, which includes a weight indication area, a counterweight identification area, a redundant tag identification area, and a blank area. Step 2: Read the EPC code of the RFID tag using an RFID reader and transmit the EPC code to the controller system; Step 3: The controller system performs format and data integrity checks on the EPC code and merges redundant information based on the data in the redundant tag identification area; Step 4: Calculate the weight of the counterweight and its total counterweight value based on the information in the EPC code; Step 5: Return the calculated weight of the counterweight and its total counterweight value to the GUI interface for the user to view and verify.

[0037] Based on the above methods, the present invention further includes the following steps: Step 6: When the counterweight is not in use, shield the radio frequency signal with a metal protective shell to avoid misreading RFID tags that do not have a counterweight installed; Step 7: If the system detects an abnormality in the counterweight or a reading failure, it will issue an alarm signal to remind the user.

[0038] The counterweight identification system and method for truck cranes based on radio frequency identification (RFID) technology provided by this invention can not only accurately identify counterweights in complex environments, but also ensure data accuracy and stability through redundant tag design and interference shielding measures. This system can significantly improve the safety and efficiency of truck crane operations, and has broad application prospects and commercial value. It should be further noted that the above embodiments are merely for understanding the technical solution of this invention and are not intended to limit the scope of protection of this invention. Any obvious adjustments and modifications made to the technical solution of this invention that fall within the inventive concept should also be within the scope of protection of this invention.

Claims

1. A counterweight identification system for a truck crane based on radio frequency identification (RFID) technology, characterized in that, The system includes RFID tags, RFID readers, antennas, a controller system, and an interference protection module; The RFID tag is used to store the electronic product code of the counterweight, which includes a weight indication area, a counterweight identification area, a redundant tag identification area, and a blank area. The radio frequency reader, in conjunction with multiple external antennas, reads the electronic product code of the radio frequency tag affixed to the counterweight by transmitting radio frequency signals; The controller system verifies the format and data integrity of the received electronic product code. The system merges redundant information based on the data in the redundant tag identification area to ensure the accuracy of RFID tag reading, and calculates the weight of the counterweight and the total counterweight. The interference signal protection module includes a metal protective shell, which is used to block the RFID tag when the counterweight is not in use, so as to shield the RFID signal and thus prevent the RFID tag without the counterweight from being misread.

2. The truck crane counterweight identification system based on radio frequency identification technology according to claim 1, characterized in that, The RFID tag is an anti-metal tag and has long-distance identification capability, high temperature resistance, and impact resistance.

3. The truck crane counterweight identification system based on radio frequency identification technology according to claim 1, characterized in that, The RF reader is connected to the controller system via an RS485 cable.

4. The truck crane counterweight identification system based on radio frequency identification technology according to claim 1, characterized in that, The radio frequency reader adopts a split design that is waterproof, dustproof, surge-resistant, and shock-resistant.

5. A method for identifying the counterweight of a truck crane based on radio frequency identification (RFID) technology, characterized in that, Implemented by the system according to any one of claims 1-4, the method reads the electronic product code in the RFID tag affixed to the counterweight by an RFID reader and transmits the reading and writing results to the controller system; The weight of the counterweight and the total counterweight are calculated using the electronic product code parsed by the controller system; this includes the following steps: Step 1: Attach the corresponding RFID tag to the counterweight. The RFID tag stores an electronic product code, which includes a weight indication area, a counterweight identification area, a redundant tag identification area, and a blank area. Step 2: Read the electronic product code of the RFID tag using an RFID reader and antenna, and transmit the electronic product code to the controller system; Step 3: The controller system performs format and data integrity checks on the electronic product code and merges redundant information based on the data in the redundant tag identification area; Step 4: Calculate the weight of the counterweight and its total counterweight value based on the information in the electronic product code.

6. The method for identifying the counterweight of a truck crane based on radio frequency identification technology according to claim 5, characterized in that, It also includes the following steps: Step 5: When the counterweight is not in use, shield the radio frequency signal with a metal protective shell to avoid misreading RFID tags that do not have a counterweight installed; Step 6: If the system detects an abnormality in the counterweight or a reading failure, it will issue an alarm signal to remind the user.

Images