A blockchain technology-based national park sustainable product traceability and certification system and method

Abstract

The application relates to a national park sustainable product traceability and authentication system and method based on a blockchain technology, and belongs to the technical field of product traceability. The national park sustainable product traceability and authentication system comprises a cloud server for maintaining and operating a blockchain network and deploying an intelligent contract, a production information input terminal for uploading production information, an input terminal for uploading quality authentication information, a first mobile terminal for uploading transaction information, and a traceability information query terminal connected for tracing and displaying park product traceability information. The cloud server is used for running and maintaining the blockchain network, the intelligent contracts of production information, quality authentication and transaction information are deployed on the blockchain network, various types of information are uploaded to the blockchain network through the intelligent contracts, complete product life cycle records for sustainable query are formed, and the decentralization and tamper-proof characteristics of the system ensure the safety and reliability of the data.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of product traceability, and specifically relates to a national park sustainable product traceability and certification system and method based on blockchain technology. BACKGROUND

[0002] With the increasing global concern for environmental protection and sustainable development, consumers are increasingly inclined to purchase products with sustainability certification, such as organic food, environmentally friendly handicrafts, and renewable resource products. For national parks and their surrounding areas, such products not only represent high quality and environmental protection, but often contain cultural and ecological value. However, counterfeit and fake products and false propaganda often occur in the market, and consumers have difficulty obtaining reliable information about the origin, production process, and certification of products. This information asymmetry not only harms the interests of consumers, but also creates an unfair competitive environment for businesses and communities that are truly committed to sustainable production.

[0003] Blockchain technology has gained widespread attention in the field of supply chain management and product traceability in recent years due to its decentralized, tamper-proof, and high transparency characteristics. Blockchain technology can establish detailed records for the production, transportation, and sales process of each product, ensuring the authenticity and traceability of information, thereby enhancing consumer trust and satisfaction. SUMMARY

[0004] The purpose of the present application is to provide a national park sustainable product traceability and certification system and method based on blockchain technology to solve the above problems.

[0005] The present application achieves the above-mentioned objectives through the following technical solutions:

[0006] A national park sustainable product traceability and certification system based on blockchain technology, which is used for product traceability according to the markers on park products, the system comprises:

[0007] A cloud server for maintaining and running a blockchain network and deploying a smart contract for traceability information of park products, the traceability information including production information, quality certification information, and transaction information;

[0008] A production information input terminal for uploading production information to the blockchain network;

[0009] An authentication information input terminal for uploading quality certification information to the blockchain network;

[0010] A first mobile terminal for uploading transaction information to the blockchain network;

[0011] The traceability information query terminal is used for scanning the marker on the park product at the exit channel to trace and display the traceability information of the park product.

[0012] The traceability information query terminal is provided with a plurality of groups, and the groups of traceability information query terminals reciprocate along a patrol track.

[0013] As a further optimization scheme of the present application, the traceability information query terminal has at least two working states of tracking mode and traceability mode, and includes a walking mechanism and a bearing mechanism fixed on the walking mechanism; in the tracking mode, the walking mechanism travels along the patrol track, and when the bearing mechanism bears the park product, the traceability information query terminal enters the traceability mode; in the traceability mode, when the trigger assembly is not triggered, the walking mechanism is braked, otherwise, the walking mechanism moves.

[0014] As a further optimization scheme of the present application, the traceability information query terminal further includes a scanning assembly and a trigger assembly provided on the bearing mechanism, the scanning assembly is provided with a display, in the traceability mode, the scanning assembly scans the marker on the park product, and the traceability information is called through the cloud server, the display is used to display the traceability information within a set time, when there is no park product on the bearing mechanism and no traceability information is displayed on the display, the traceability information query terminal enters the tracking mode.

[0015] As a further optimization scheme of the present application, the bearing mechanism includes a support part, a pressure sensor fixed on the top of the support part, and a load plate fixed on the top of the pressure sensor, one side of the support part is provided with a mounting groove corresponding to the trigger assembly, the trigger assembly includes a handle slidingly arranged on the inner side of the mounting groove, a trigger switch fixed on one end of the mounting groove, and a reset piece fixed on the other end of the mounting groove and fixed with the handle, one end of the handle is fixed with a first magnetic part, and the inner side of the mounting groove is provided with a second magnetic part corresponding to the first magnetic part.

[0016] As a further optimization scheme of the present application, the scanning assembly includes a mounting bracket and a first camera fixed on the top of the mounting bracket, the display is provided with a plurality of displays, and the plurality of displays are fixedly connected together with the mounting bracket.

[0017] As a further optimization scheme of the present application, the patrol track includes a first straight section, a second straight section, and two curved sections symmetrically arranged between the first straight section and the second straight section, the first straight section is arranged close to the exit channel, and the set value of the travel speed of the walking mechanism in the first straight section is less than the set value of the travel speed in the second straight section.

[0018] As a further optimization scheme of the present application, the walking mechanism comprises a tracking trolley and a second camera arranged on the front side of the tracking trolley, the second camera is used for identifying a patrol track and a front trace information query terminal, when the second camera on a trace information query terminal identifies that there is another trace information query terminal in front, the trace information query terminal where the second camera is located stops driving.

[0019] As a further optimization scheme of the present application, the transaction information comprises identity information of a product seller, the first mobile terminal is connected with a smart wearable device, the smart wearable device is used for recording and sending the identity information of the product seller, and the first mobile terminal uploads the identity information sent by the smart wearable device to the blockchain network through a smart contract.

[0020] As a further optimization scheme of the present application, the system further comprises a second mobile terminal carried by a visitor, the second mobile terminal is used for scanning a marker on a park product, and tracing and displaying trace information of the park product.

[0021] A national park sustainable product tracing and certification method based on a blockchain technology comprises the following steps:

[0022] S1, a cloud server is used for maintaining and running a blockchain network, and a smart contract of trace information of a park product is deployed, the smart contract comprises a production information smart contract, a quality certification information smart contract and a transaction information smart contract;

[0023] S2, a production information input terminal is connected with the cloud server, and production information is uploaded to the blockchain network through the production information smart contract;

[0024] S3, an authentication information input terminal is connected with the cloud server, and quality certification information is uploaded to the blockchain network through the quality certification information smart contract;

[0025] S4, a first mobile terminal is connected with the cloud server, and transaction information is uploaded to the blockchain network through the transaction information smart contract;

[0026] S5, a trace information query terminal drives along a patrol track on one side of an exit channel, when the trace information query terminal carries a park product, the trace information query terminal scans a marker on the park product and connects with the cloud server, and trace information of the park product is traced and displayed through the blockchain network.

[0027] The present application has the following beneficial effects:

[0028] 1) The application runs through a cloud server and maintains a blockchain network, deploys a traceability information smart contract related to production information, quality certification and transaction information on the blockchain network, and uploads various information to the blockchain network through the smart contract to form a complete product life cycle record that can be queried sustainably, and the decentralized and tamper-proof characteristics of the system ensure the security and credibility of the data;

[0029] 2) The application sets a traceability information query module on one side of the exit channel, and tourists can query the above information through the patrolling and reciprocating traceability information query terminal when queuing to exit the park after purchasing park products, so that tourists can trace the traceability information of park products while queuing, view the certification information, improve the play experience of tourists during the peak period of passenger flow, and effectively protect the consumer rights and interests;

[0030] 3) The traceability information query terminal has two working states of tracking mode and traceability mode, in the tracking mode, the walking mechanism drives along the patrolling track to avoid tourists concentrating on one side of the patrolling track and affecting other tourists, and when the carrying mechanism carries park products, the traceability information query terminal enters the traceability mode, in this mode, when the trigger component is not triggered, the walking mechanism is braked to facilitate tourists to view the traceability information, and when the tourists walk, the trigger component makes the walking mechanism continue to drive to ensure that tourists can have enough time to view the traceability information;

[0031] 4) Two magnetic components are correspondingly arranged on the handle of the trigger mechanism and the mounting groove, when the tourists overcome the spring force to push the handle and press the trigger switch through the handle, the magnetic components provide a pulling force to the handle to avoid frequent state conversion of the trigger switch caused by shaking, and also make the process of tourists operating the trigger mechanism more labor-saving, when the tourists stop walking, the handle is released, at this time, the elastic force of the reset piece is greater than the attractive force of the magnetic component, the handle is automatically reset, and the experience of tourists tracing the product is improved;

[0032] 5) A plurality of displays are arranged on the scanning assembly of the traceability information query terminal, which can display the traceability information of several park products, the traceability information display content disappears after a set time, in the case that there is no traceability information display content on the traceability information query terminal and no park products are carried, the traceability information query terminal reenters the tracking mode, avoids the traceability information query terminal staying at a certain place of the patrolling track, and the traceability information query terminal moves at a high speed on the side of the patrolling track away from the exit channel, and the utilization rate of the traceability information query terminal is improved;

[0033] 6) The first mobile terminal is connected with the smart wearable device in the application, the smart wearable device is used for recording and sending the identity information of product sellers, transaction place information and transaction position information, the first mobile terminal uploads the above information to the blockchain network through the smart contract, and the traceability information query terminal issues a prompt to the tourists when the tourists trace the source, if there is a phenomenon that the traceability information is missing or the predetermined transaction place information and transaction position information do not match, so as to avoid the self-consumer rights and interests of the tourists from being infringed when the tourists purchase the park products. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is the system block diagram of the application;

[0035] Figure 2 is the cloud server structure schematic diagram of the application;

[0036] Figure 3 is the traceability information query terminal structure schematic diagram of the application;

[0037] Figure 4 is Figure 3 is the enlarged view of A in the application;

[0038] Figure 5 is the internal structure schematic diagram of the trigger assembly of the application;

[0039] Figure 6 is the working state schematic diagram of the traceability information query terminal of the application.

[0040] In the figure: 1, walking mechanism;2, bearing mechanism;3, scanning assembly;4, trigger assembly;5, display;6, mounting groove;11, tracking trolley;12, second camera;21, support part;22, pressure sensor;23, carrier plate;24, guide rod;25, limiting cylinder;31, mounting frame;32, first camera;41, handle;42, trigger switch;43, reset piece;44, first magnetic part;45, second magnetic part;46, baffle;T1, first straight section;T2, second straight section. DETAILED DESCRIPTION

[0041] It is necessary to point out here that the following detailed description is only used to further illustrate the application, and cannot be understood as limiting the protection scope of the application, and the skilled in the art can make some non-essential improvements and adjustments to the application according to the above application content.

[0042] First embodiment

[0043] As Figure 1As shown, a national park sustainable product traceability and certification system based on blockchain technology is used for product traceability according to the markers on the park products, which are sustainable traceable certified products sold in the national park and its surrounding areas. The markers on the park products are barcodes, two-dimensional codes or identification layers composed of other graphics. The marker in the embodiment is preferably a two-dimensional code. The national park sustainable product traceability and certification system comprises a cloud server connected with a production information input terminal, an authentication information input terminal, a first mobile terminal and a traceability information query terminal. The cloud server is used to maintain and run a blockchain network and deploy smart contracts of traceability information of park products. The traceability information includes production information, quality certification information and transaction information, which correspond to production information smart contracts, quality certification information smart contracts and transaction information smart contracts respectively.

[0044] Specifically, the production information includes key data collected in each stage of product production, such as raw material source, production process, park product number information, etc. These data are automatically collected by Internet of Things devices (such as radio frequency identification tags, sensors, etc.), ensuring the accuracy and real-time nature of the data. The traceability information query terminal can display these information, which can reduce the false propaganda of park product manufacturers. The quality certification information is product quality certification information collected by a third-party quality inspection agency. The transaction information includes the identity information of the park product seller, the transaction time information, the transaction place information and the transaction location information. Please refer to Figure 2 The cloud server comprises a smart contract management module, a distributed coordination module, a consensus algorithm control module, an on-chain management module, a query management module and a traceability information storage module. The smart contract management module is used to build various smart contracts on the blockchain network. The distributed coordination module is used to maintain the state transition of consensus node leaders, followers and observers. The consensus algorithm control module is used to call the consensus algorithm of the blockchain network. The cloud server is deployed with smart contracts of the main chain, which can index the sub-chains through the main chain. The production information smart contract, the quality certification information smart contract and the transaction information smart contract are the smart contracts of each sub-chain. The on-chain management module is used to call the smart contracts of each sub-chain and perform the on-chain of traceability information. The query management module is used to call the smart contracts of the main chain, thereby tracing the park products. The traceability information storage module is used to store various traceability information. The specific on-chain method of the blockchain network can be referred to the Chinese patent document with publication number CN113506117A.

[0045] The production information input terminal is used for uploading production information to the blockchain network, and the production information input terminal is connected with the Internet of Things device used for collecting key data of each stage of product production. The authentication information input terminal is used for uploading quality authentication information to the blockchain network, and the authentication information input terminal is connected with the Internet of Things device used for product quality inspection in the third-party quality inspection agency. The first mobile terminal is preferably a smart phone carried by a product seller, which is used for uploading transaction information to the blockchain network. The first mobile terminal is connected with a smart wearable device, and the smart wearable device is used for recording and sending the identity information of the product seller. The first mobile terminal uploads the identity information sent by the smart wearable device to the blockchain network through a smart contract. The product seller needs to carry the smart wearable device when selling park products in or around the national park. The smart wearable device in the embodiment is preferably a smart bracelet, and the smart bracelet stores the identity information of the product seller and transaction location information, which is collected by a locator in the smart bracelet.

[0046] In the production process of the park product, the production information input terminal uploads the production information to the blockchain network through a production information smart contract. After the park product is produced, the park product is inspected by a third-party quality inspection agency. The authentication information input terminal uploads the quality authentication information to the blockchain network through a quality authentication information smart contract. After the product seller obtains the park product, the product seller registers the identity information and transaction location information at the national park staff and wears the smart bracelet storing the above identity information and transaction location information. Then, the product seller sells the park product at the transaction location registered by the product seller. The smart bracelet can send the identity information of the product seller and the transaction location information to the first mobile terminal when the park product is traded. When a tourist purchases the park product, the first mobile terminal sends a calling information instruction to the smart bracelet. After receiving the instruction, the smart bracelet sends the identity information of the product seller and the transaction location information, as well as the transaction location information acquired by the smart bracelet in real time, to the first mobile terminal. The first mobile terminal uploads the above information and transaction time information to the blockchain network.

[0047] The traceability information query terminal has at least two working states of a trace mode and a traceability mode, and the traceability information query terminal includes a walking mechanism 1 and a bearing mechanism 2 fixed on the walking mechanism 1. The exit of the national park has an exit channel. Please refer to Figure 3 and Figure 6The traceability information query terminal is used for scanning the marker on the park product at the exit channel to trace and display the traceability information of the park product. The traceability information query terminal is provided with a plurality of groups, and the number of groups of the traceability information query terminal corresponds to the number of exit channels. The grouped traceability information query terminals reciprocate along a patrol track. The patrol track is provided on one side of the exit channel. The patrol track includes a first straight section T1, a second straight section T2, and two curved sections symmetrically arranged between the first straight section T1 and the second straight section T2. Different marks are provided on the first straight section T1 and the second straight section T2 to distinguish the sections where the traceability information query terminal travels. The first straight section T1 is arranged close to the exit channel, and the travel speed set value of the walking mechanism 1 on the first straight section T1 is less than that on the second straight section T2. The walking mechanism 1 includes a tracking trolley 11 and a second camera 12 arranged on the front side of the tracking trolley 11. The second camera 12 is used to identify the patrol track and the traceability information query terminal in front. Through the cooperation of the second camera 12 and the control module inside the tracking trolley 11, the patrol track is identified by image recognition, and the moving direction and speed of the tracking trolley 1 are adjusted according to the identification result. The above image recognition is a known skill and will not be described in detail.

[0048] In the tracking mode, the walking mechanism 1 travels along the patrol track. When the carrying mechanism 2 carries the park product, the traceability information query terminal enters the traceability mode. In the traceability mode, when the trigger assembly 4 is not triggered, the walking mechanism 1 is braked, otherwise, the walking mechanism 1 moves. The travel speed set values on the first straight section T1 and the second straight section T2 are respectively the preset uniform travel speeds of the walking mechanism 1 on the first straight section T1 and the second straight section T2. In the embodiment, the travel speed set value on the first straight section T1 is preferably 1.5 km / h, and the travel speed set value on the second straight section T2 is preferably 20 km / h. When the second camera 12 on a traceability information query terminal identifies that there is another traceability information query terminal in front, the traceability information query terminal where the second camera 12 is located stops traveling.

[0049] As Figures 3-5As shown, the bearing mechanism 2 comprises a support component 21, a pressure sensor 22 fixed on the top of the support component 21, and a carrier plate 23 fixed on the top of the pressure sensor 22, the bottom of the carrier plate 23 is provided with a plurality of guide rods 24, and the top of the support component 21 is provided with a limiting cylinder 25 corresponding to the guide rod 24, the support component 21 is a box structure, and a power supply and a controller are arranged in the box structure, the box structure covers a large area of the tracking trolley 11, so as to avoid that tourists carry articles carried by tourists by using the tracking trolley 11. One side of the support component 21 is provided with a mounting groove 6 corresponding to the trigger assembly 4, the trigger assembly 4 comprises a handle 41 slidingly arranged in the inner side of the mounting groove 6, a trigger switch 42 fixed on one end of the mounting groove 6, and a reset member 43 fixed on the other end of the mounting groove 6 and fixed with the handle 41, the reset member 43 in the embodiment is preferably a spring, and the two ends of the spring are fixedly connected with one side of the handle 41 extending into the mounting groove 6 and the end of the mounting groove 6 respectively, one end of the handle 41 is fixedly provided with a first magnetic component 44, and the inner side of the mounting groove 6 is provided with a second magnetic component 45 corresponding to the first magnetic component 44.

[0050] The traceability information query terminal further comprises a scanning assembly 3 and a trigger assembly 4 arranged on the bearing mechanism 2, the scanning assembly 3 is provided with a display 5, the scanning assembly 3 comprises a mounting frame 31 and a first camera 32 fixed on the top of the inner side of the mounting frame 31, the display 5 is provided with a plurality of displays 5, and the plurality of displays 5 are fixedly connected with the mounting frame 31, and the traceability information query terminal further has a loudspeaker. The loudspeaker can be integrated on the display 5 or arranged separately from the display 5, and the loudspeaker in the embodiment is arranged on the mounting frame 31. When the traceability information is missing, the park product purchased by the tourist may be a fake and inferior product, and the loudspeaker issues a voice prompt to remind the tourist to pay attention to protecting the consumer rights and interests. In the traceability mode, the scanning assembly 3 scans the marker on the park product, and the traceability information is called through the cloud server, the display 5 is used for displaying the traceability information within a set time length, when the park product does not exist on the bearing mechanism 2 and the display 5 does not display the traceability information, the traceability information query terminal enters the tracking mode.

[0051] When the tourists are in the exit channel of the park, they can place the park products they have purchased on the loading plate 23, and the park products are detected by the pressure sensor 22. The pressure sensor 22 transmits the collected pressure information to the controller in the support component 21, which is connected to the track trolley 11, the second camera 12, the first camera 32 and the display 5. When the pressure exceeds the pressure setting value, the controller sends a control instruction to the track trolley 11, so that the traceability information query terminal enters the traceability mode. At the same time, the controller scans the two-dimensional code on the park product through the first camera 32. According to the scanning result, the controller obtains the number of the park product, and retrieves the product traceability information from the blockchain network through the number. The traceability information of the park product is displayed through the display 5. When the traceability information is missing, or the transaction place information does not match the transaction location information, a voice prompt is issued through the loudspeaker, and the tourists can return to the transaction location to negotiate with the product seller, or find the monitoring according to the transaction location information and the transaction time information, so as to facilitate the tourists to maintain their own rights and interests when they purchase fake and inferior products.

[0052] When the tourists are in the exit channel of the park and need to queue, when the exit team advances and the tourists do not check the traceability information clearly, the tourists can pull the handle 41 to press the trigger switch 42 against the spring force. The trigger switch 42 is connected to the controller in the support component 21. After the trigger switch 42 is pressed, the controller makes the track trolley 11 continue to travel. When the travel speed reaches the travel speed setting value of the first straight section T1, the track trolley 11 travels at a constant speed. When the trigger switch 42 is pressed, the second magnetic component 45 provides an attractive force to the first magnetic component 44 to pull the handle 41, so that the tourists' operation process is more labor-saving. After the tourists release the handle 41, the spring force is greater than the attractive force between the second magnetic component 45 and the first magnetic component 44, and the handle 41 is reset by the spring. In addition, the handle 41 is L-shaped, an opening corresponding to the handle 41 is formed in the mounting groove 6, and two symmetrical baffles 46 are fixed on one side of the handle 41. The two baffles 46 are attached to the inner wall of the mounting groove 6 to close the opening of the mounting groove 6 when the handle 41 moves. The above-mentioned queuing condition is often seen in national parks with high peak tourist flow, and national parks that need to exchange tickets or other rental items when exiting. In addition, the box-shaped support component 21 can cover a large part of the upper surface of the track trolley 11, which not only protects the internal control equipment, but also prevents tourists from placing their own items on the track trolley 11. When the controller detects that the loading plate 23 is loaded with items for a long time, that is, the duration of the condition that the pressure measured by the pressure sensor 22 exceeds the pressure setting value exceeds the threshold value, the loudspeaker issues a voice warning to remind the tourists to take the items placed on the loading plate 23 for a long time.

[0053] As Figure 1As shown, the system also includes a second mobile terminal carried by the visitor, which is used to scan the marker on the park product, trace and display the traceability information of the park product. The second mobile terminal is preferably a smart phone carried by the visitor. The visitor can trace the park product through the smart phone, and the working mode is similar to the scanning assembly 3 and the display 5 of the traceability information query terminal, so it will not be described in more detail. In addition, in some other embodiments, fixed-point query terminals are arranged at other locations in the national park and around the national park. The fixed-point query terminal is different from the traceability information query terminal in that the fixed-point query terminal does not have a walking mechanism 1. In addition to using the traceability information query terminal at the exit of the national park to trace the park product, the visitor can also check the traceability information of the park product through the fixed-point query terminal. In addition, in some other embodiments, for the distribution and marketing process of the park product, a corresponding smart contract can also be deployed on the blockchain network, so as to trace the transportation process of the park product. In some other embodiments, the system also deploys a smart contract for automatically processing transactions and payments on the blockchain network. During the transaction process, the second mobile terminal calls the quality certification information through the blockchain network, and when the park product has corresponding quality certification information, the smart contract automatically triggers the payment process to ensure the efficiency and security of the transaction. Smart contracts for various application scenarios such as product recall management and reward points can also be deployed on the blockchain network.

[0054] Second embodiment

[0055] The present embodiment relates to a national park sustainable product traceability and certification method based on blockchain technology, which can be used in the national park sustainable product traceability and certification system of the first embodiment, and specifically includes the following steps:

[0056] S1, maintain and run the blockchain network through the cloud server, and deploy the smart contract of the traceability information of the park product, which includes the production information smart contract, the quality certification information smart contract and the transaction information smart contract;

[0057] S2, the production information input terminal is connected to the cloud server, and the production information is uploaded to the blockchain network through the production information smart contract, the production information including key data collected in each stage of product production, such as raw material source, production process, park product number information, etc.;

[0058] S3, the authentication information input terminal is connected to the cloud server, and the quality certification information is uploaded to the blockchain network through the quality certification information smart contract, the quality certification information being the product quality certification information collected by the third-party quality inspection agency;

[0059] S4, the first mobile terminal connects the cloud server, and uploads the transaction information to the blockchain network through the transaction information smart contract, the transaction information including the identity information of the park product seller, the transaction time information, the transaction place information and the transaction location information;

[0060] S5, the traceability information query terminal drives along the patrol track on one side of the park exit channel, when the traceability information query terminal carries the park product, the traceability information query terminal scans the marker on the park product and connects the cloud server, and traces and displays the traceability information of the park product through the blockchain network.

[0061] The above-mentioned embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application.

Claims

1. A blockchain-based traceability and certification system for sustainable products in national parks, wherein the system is used for product traceability based on markings on park products, characterized in that, The system includes: A cloud server is used to maintain and run the blockchain network and deploy smart contracts for the traceability information of park products, which includes production information, quality certification information, and transaction information. A production information input terminal is used to upload production information to the blockchain network; An authentication information input terminal is used to upload quality authentication information to the blockchain network; The first mobile terminal is used to upload transaction information to the blockchain network; The traceability information query terminal is used to scan the markers on park products at the exit passage to trace and display the traceability information of the park products; Among them, the traceability information query terminal is set in several groups, and the group of traceability information query terminals moves back and forth along a circulation track, which is set on one side of the exit passage; The traceability information query terminal has at least two working states: tracking mode and traceability mode. The traceability information query terminal includes a walking mechanism (1) and a carrying mechanism (2) fixed on the walking mechanism (1), as well as a scanning component (3) and a triggering component (4) set on the carrying mechanism (2). In the tracking mode, the walking mechanism (1) travels along the circumvention track. When the carrying mechanism (2) carries the park product, the traceability information query terminal enters the traceability mode. In the traceability mode, when the triggering component (4) is not triggered, the walking mechanism (1) brakes; otherwise, the walking mechanism (1) moves. The scanning component (3) is equipped with a display (5). In the traceability mode, the scanning component (3) scans the markers on the park products and retrieves the traceability information through the cloud server. The display (5) is used to display the traceability information within a set time period. When there are no park products on the carrier (2) and the traceability information is not displayed on the display (5), the traceability information query terminal enters the tracking mode. The bearing mechanism (2) includes a support component (21), a pressure sensor (22) fixed on the top of the support component (21), and a carrier plate (23) fixed on the top of the pressure sensor (22). The support component (21) has a mounting groove (6) corresponding to the trigger assembly (4) on one side. The trigger assembly (4) includes a handle (41) slidably disposed inside the mounting groove (6), a trigger switch (42) fixed at one end of the mounting groove (6), and a reset component (43) fixed at the other end of the mounting groove (6) and fixed to the handle (41). A first magnetic component (44) is fixed at one end of the handle (41), and a second magnetic component (45) corresponding to the first magnetic component (44) is disposed inside the mounting groove (6). When the trigger switch (42) is pressed, the second magnetic component (45) provides attraction to the first magnetic component (44) to pull the handle (41). After the handle (41) is released, the spring force is greater than the attraction between the second magnetic component (45) and the first magnetic component (44), and the handle (41) is reset by the spring.

2. The national park sustainable product traceability and certification system according to claim 1, characterized in that: The scanning component (3) includes a mounting bracket (31) and a first camera (32) fixed on the top of the mounting bracket (31). Multiple displays (5) are provided, and the multiple displays (5) are fixedly connected to the mounting bracket (31).

3. The national park sustainable product traceability and certification system according to claim 1, characterized in that: The circulation trajectory includes a first straight section, a second straight section, and two curved sections symmetrically arranged between the first straight section and the second straight section. The first straight section is located near the exit passage. The travel speed setting of the walking mechanism (1) in the first straight section is less than the travel speed setting in the second straight section.

4. The national park sustainable product traceability and certification system according to claim 3, characterized in that: The walking mechanism (1) includes a tracking trolley (11) and a second camera (12) set in front of the tracking trolley (11). The second camera (12) is used to identify the patrol track and the traceability information query terminal in front. When the second camera (12) on a traceability information query terminal identifies that there is another traceability information query terminal in front, the traceability information query terminal where the second camera (12) is located stops moving.

5. The national park sustainable product traceability and certification system according to claim 1, characterized in that: The transaction information includes the identity information of the product seller. The first mobile terminal is connected to a smart wearable device, which is used to record and send the identity information of the product seller. The first mobile terminal uploads the identity information sent by the smart wearable device to the blockchain network through a smart contract.

6. The national park sustainable product traceability and certification system according to claim 1, characterized in that: The system also includes a second mobile terminal carried by visitors, which is used to scan markers on park products to trace and display the product's origin information.

7. A method for traceability and certification of sustainable products in national parks based on blockchain technology, characterized in that: The national park sustainable product traceability and certification system based on any one of claims 1-6 includes the following steps: S1. Maintain and run the blockchain network through a cloud server, and deploy smart contracts for the traceability information of park products, including smart contracts for production information, smart contracts for quality certification information, and smart contracts for transaction information. S2. The production information input terminal connects to the cloud server and uploads production information to the blockchain network through the production information smart contract. S3. The authentication information input terminal connects to the cloud server and uploads quality authentication information to the blockchain network through the quality authentication information smart contract. S4. The first mobile terminal connects to the cloud server and uploads transaction information to the blockchain network through the transaction information smart contract; S5. The traceability information query terminal travels along a patrol track on one side of the exit passage. When the traceability information query terminal carries park products, it scans the markers on the park products and connects to the cloud server to trace and display the traceability information of the park products through the blockchain network.

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